Electronic device

Abstract

An electronic device. The electronic device comprises a first housing (3), a second housing (4), a third housing (5), a first rotating shaft mechanism (1) and a second rotating shaft mechanism (2), wherein the first housing (3) and the second housing (4) are rotatably connected by means of the first rotating shaft mechanism (1), and the second housing (4) and the third housing (5) are rotatably connected by means of the second rotating shaft mechanism (2). When the electronic device is used, the first housing (3) and the second housing (4) can rotate towards or away from each other under the action of the first rotating shaft mechanism (1), and the second housing (4) and the third housing (5) can rotate towards or away from each other under the action of the second rotating shaft mechanism (2), so that the electronic device can be folded and unfolded according to different use scenarios. In addition, in the process of folding the electronic device, the first rotating shaft mechanism (1) can limit the movement distances of the first housing (3) and the second housing (4) relative to a main shaft (102), and the second rotating shaft mechanism (2) can form a screen accommodating space meeting the bending requirement of a flexible display screen (6), thereby reducing stretching or compression on the flexible display screen (6), and thus improving the structural reliability of the electronic device.

Description

An electronic device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on January 3, 2024, with application number 202410025001.5 and application name "An Electronic Device", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of foldable electronic devices, and in particular to an electronic device. Background Art

[0004] As flexible display technology matures, the display methods of electronic devices have undergone significant changes. Foldable flexible screen mobile phones, foldable flexible screen tablets, and wearable electronic devices with foldable flexible screens are a major evolutionary direction for future smart electronic devices. To meet users' demands for large displays and portability, tri-foldable devices are gradually being used in people's daily lives.

[0005] The hinge mechanism is a key component for a foldable electronic device to achieve the folding function. During the process of unfolding and closing the electronic device, it can drive the flexible display screen of the electronic device to flatten or bend. A three-fold electronic device usually includes three shells arranged side by side, and two adjacent shells are rotatably connected by a hinge mechanism to enable the three-fold electronic device to switch between different folding forms. In addition, the flexible display screen of the three-fold electronic device is continuously covered by the three shells. During the process of unfolding and closing the three-fold electronic device, the hinge mechanism can drive the flexible display screen to flatten or bend. Since the flexible display screen in the three-fold electronic device is larger in size and has more folding positions, it has higher requirements for reliability.

[0006] Based on this, how to design the hinge mechanism in the tri-fold electronic device to ensure the structural reliability of the flexible display during the folding process has become a difficult problem that needs to be solved urgently by technical personnel in this field.

[0007] Summary of the Invention

[0008] The present application provides an electronic device to reduce the risk of damage to a flexible display screen and improve the structural reliability of the electronic device.

[0009] The present application provides an electronic device, which includes a first shell, a second shell, a third shell, a first rotating shaft mechanism and a second rotating shaft mechanism. The first shell and the second shell are rotationally connected via the first rotating shaft mechanism, and the second shell and the third shell are rotationally connected via the second rotating shaft mechanism. The first rotating shaft mechanism is arranged opposite to a bendable part of the flexible display screen of the electronic device. When the first rotating shaft mechanism is specifically arranged, it may include a first shell fixing frame, a second shell fixing frame, a main shaft and a first rotating module. The first shell fixing frame and the second shell fixing frame are respectively arranged on opposite sides of the main shaft. 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 first rotating module includes a first rotating assembly and a second rotating assembly. The first rotating assembly is located between the first shell fixing frame and the second shell fixing frame, and the second rotating assembly is located between the first shell fixing frame and the second shell fixing frame. The first rotating assembly may include a first swing arm, a first support arm, and a first connecting member, wherein the first swing arm is rotationally connected to the main shaft, the first swing arm is slidably connected to the first housing fixing frame, the first support arm is rotationally connected to the second housing fixing frame, the first connecting member is located between the first swing arm and the first support arm, the first connecting member is rotationally connected to the first swing arm, and the first connecting member is rotationally connected to the first support arm. In addition, the main shaft is provided with a first trajectory groove, the first connecting member can move along the first trajectory groove to limit the movement trajectory of the first connecting member, thereby limiting the trajectory of the first swing arm pulling the first support arm through the first connecting member. The second rotating assembly may include a second swing arm, a second support arm, and a second connecting member, wherein the second swing arm is rotationally connected to the main shaft, the second swing arm is slidably connected to the second housing fixing frame, the second support arm is rotationally connected to the first housing fixing frame, the second connecting member is located between the second swing arm and the second support arm, the second connecting member is rotationally connected to the second swing arm, and the second connecting member is rotationally connected to the second support arm. In addition, the main shaft is also provided with a second track groove, and the second connecting member can move along the second track groove to limit the movement track of the second connecting member, thereby limiting the movement track of the second swing arm pulling the second support arm through the second connecting member.

[0010] Based on the above-mentioned rotating shaft mechanism of the present application, when the electronic device moves from an expanded 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 clockwise 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 counterclockwise around the main axis; when the second shell fixing frame drives the second swing arm to rotate counterclockwise 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 clockwise around the main axis. When the electronic device moves from a closed state to an 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 within the first track groove of the main axis toward the first support arm, 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 within the second track groove of the main axis toward the second support arm, thereby driving the second support arm to rotate counterclockwise around the main axis. This realizes the folding and unfolding functions of the hinge mechanism.

[0011] In some existing hinge mechanisms, in order to ensure the stability of the mechanism, it is necessary to increase the thickness of the rotating assembly connected to the main shaft. This will make the main shaft and the hinge mechanism very thick. If the thickness is forcibly reduced, the strength of the rotating assembly will be weakened, which will greatly affect the reliability of the hinge mechanism and thus reduce the life of the electronic device. The first hinge mechanism of the present application has a streamlined 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 and cross-section of the first connecting member and the second connecting member do 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 (second swing arm) and the first support arm (second support arm), the first connecting member (second connecting member) has a sufficient length extending in the direction perpendicular to the axis, thus having sufficient strength to ensure the reliability of the hinge mechanism. In this way, the thickness of the main shaft and the thickness of the entire device can be reduced while maintaining the reliability of the hinge mechanism, making the entire hinge mechanism light and reliable.

[0012] In addition, since the first connecting member can move along a set trajectory within the first track groove, and the second connecting member can move along a set trajectory within the second track groove, uncontrolled movement of the first connecting member and the second connecting member can be avoided throughout the 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 movement stability of the entire hinge mechanism. In some cases, through reasonable design of the first track groove and the second track groove, the outer tangent of the hinge mechanism can also maintain a constant length throughout the folding and unfolding process, thereby allowing the flexible display covering the surface of the hinge mechanism to basically maintain a constant length. In this way, squeezing or pulling of the flexible display can be effectively avoided, thereby improving the structural reliability of the flexible display, and thus improving the structural reliability of the electronic device.

[0013] In a possible implementation of the present application, the main shaft includes a first base and a first cover plate, the first cover plate is covered on the first base, the first base is provided with a first arcuate groove, and the first cover plate includes a first protrusion arranged toward the first arcuate groove, and the gap between the surface of the first protrusion and the groove surface of the first arcuate groove can serve as a first track groove. In addition, the first connecting member may include a first arcuate surface and a second arcuate surface, and when the first shell and the second shell are in the expanded state and the closed state, the first arcuate surface abuts the surface of the first protrusion, and the second arcuate surface abuts the groove surface of the first arcuate groove. As a result, the surface of the first protrusion and the groove surface of the first arcuate groove limit the first connecting member to the first track groove, so that the position of the first connecting member is relatively stable when the first rotating shaft mechanism is in the expanded state and the closed state, and no virtual position shaking occurs, thereby improving the reliability of the first rotating shaft mechanism in the above two states.

[0014] In addition, the first base may also be provided with a third arcuate groove, and the first cover plate may further include a third protrusion provided toward the third arcuate groove. The gap between the surface of the third protrusion and the groove surface of the third arcuate groove serves as a second track groove. The second connecting member may include a third arcuate surface and a fourth arcuate surface. When the first shell and the second shell are in the expanded state and the 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. Thus, the surface of the third protrusion and the groove surface of the third arcuate groove restrict the second connecting member to the second track groove, so that the position of the second connecting member is relatively stable when the first rotating shaft mechanism is in the expanded state and the closed state, without any virtual position shaking, thereby improving the reliability of the first rotating shaft mechanism in the above two states.

[0015] In one possible implementation of the present application, when the first and second shells move from an expanded state to a closed state, the first curved surface abuts the surface of the first protrusion, and a gap exists between the second curved surface and the groove surface of the first curved groove. However, when the first and second shells move from a closed state to an expanded state, the second curved surface abuts the groove surface of the first curved groove, and a gap exists between the first curved surface and the surface of the first protrusion. This results in the movement trajectory of the first connecting member within the first trajectory groove during the movement of the first and second shells from an expanded state to a closed state being different from the movement trajectory of the first connecting member within the first trajectory groove during the movement of the first and second shells from a closed state to an expanded state, which helps to enhance the flexibility of the design of the first rotating shaft mechanism.

[0016] Furthermore, when the first and second shells move from an expanded state to a closed state, the third curved surface abuts the surface of the third protrusion, and a gap exists between the fourth curved surface and the groove surface of the third curved groove. However, when the first and second shells move from a closed state to an expanded state, the fourth curved surface abuts the groove surface of the third curved groove, and a gap exists between the third curved surface and the surface of the third protrusion. This results in the second connecting member's movement trajectory within the second trajectory groove during the process of the first and second shells moving from an expanded state to a closed state being different from the movement trajectory of the second connecting member within the second trajectory groove during the process of the first and second shells moving from a closed state to an expanded state, which helps enhance the flexibility of the first hinge mechanism design.

[0017] In the present application, the movement trajectory of the first connecting member within the first trajectory groove during the process of the first and second shells moving from the expanded state to the closed state can also be made the same as the movement trajectory of the first connecting member within the first trajectory groove during the process of the first and second shells moving 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 arcuate groove is equal at all locations. In this case, the first trajectory groove is a groove of equal width. During the process of the first and second shells moving from the expanded state to the closed state and from the closed state to the expanded state, the first arcuate surface abuts the surface of the first protrusion, and the second arcuate surface abuts the groove surface of the first arcuate groove. This can help improve the stability of the movement of the first connecting member within the first trajectory groove. Similarly, the distances between the surface of the third protrusion and the groove surface of the third arcuate groove at all locations can also be equal, so that the second trajectory groove is a groove of equal width. In addition, in the process of the first shell and the second shell moving 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, so that the movement trajectory of the second connecting member in the second trajectory groove in the process of the first shell and the second shell moving from the expanded state to the closed state is the same as the movement trajectory of the second connecting member in the second trajectory groove in the process of the first shell and the second shell moving from the closed state to the expanded state, thereby improving the stability of the second connecting member moving in the second trajectory groove.

[0018] In a possible implementation of the present application, 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.

[0019] Similarly, the third arc surface of the second connecting member can be a circular arc surface, and the fourth arc surface can also be a circular 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.

[0020] In the present application, a first swing arm is rotationally connected to the spindle. The first base is provided with a second arcuate slot, and the first swing arm includes a first arcuate rotating block. The first arcuate rotating block is accommodated in the second arcuate slot and can slide along the groove surface of the second arcuate slot to achieve the rotational connection between the first swing arm and the spindle. This allows the first swing arm to be rotationally connected to the spindle via a virtual axis, which helps reduce the space occupied by the first swing arm on the spindle, thereby facilitating a miniaturized design of the first rotating shaft mechanism.

[0021] The second swing arm is also rotationally connected to the main shaft. The first base is further provided with a fourth arcuate slot. The second swing arm includes a second arcuate rotating block, which is accommodated in the fourth arcuate slot and slides along the slot surface of the fourth arcuate slot to achieve the rotational connection between the second swing arm and the main shaft. This ensures that the second swing arm and the main shaft are rotationally connected via a virtual axis, which helps reduce the space occupied by the second swing arm on the main shaft, thereby facilitating a miniaturized design of the first rotating shaft mechanism.

[0022] It is understood that in the present application, when the first and second housings are connected in an outwardly folding manner, when the first swing arm is rotationally connected to the main shaft via a virtual shaft or a solid shaft, the axis of rotation of the first swing arm about the main shaft is located on the side of the main shaft facing away from the flexible display screen. Furthermore, when the second swing arm is rotationally connected to the main shaft via a virtual shaft or a solid shaft, the axis of rotation of the second swing arm about the main shaft is located on the side of the main shaft facing away from the flexible display screen.

[0023] In order to improve the reliability of the connection between the first swing arm and the main shaft, in the present application, the first 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 is limited to the main shaft by the second protrusion and the second arc-shaped groove, thereby preventing the first swing arm from falling out of the second arc-shaped groove.

[0024] In addition, the first cover plate also includes a fourth protrusion arranged toward the fourth arc-shaped groove, and at least a portion of the second arc-shaped rotating block is located between the fourth protrusion and the fourth arc-shaped groove, so that the second swing arm is limited to the main shaft through the fourth protrusion and the fourth arc-shaped groove, thereby preventing the second swing arm from falling out of the fourth arc-shaped groove.

[0025] In a possible implementation of the present application, the first connecting member includes a first rotating shaft and a second rotating shaft. The first connecting member and the first swing arm are rotationally connected through the first rotating shaft, and the first connecting member and the first support arm are rotationally connected through the second rotating shaft. The axis of the first rotating shaft is parallel to the axis of the second 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.

[0026] The second connecting member includes a third rotating shaft and a fourth rotating shaft. The second connecting member and the second swing arm are rotationally connected through the third rotating shaft. The second connecting member and the second support arm are rotationally connected through the fourth rotating shaft. The axis of the third rotating shaft is parallel to the axis of the fourth 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.

[0027] When the first swing arm and the first connecting member are rotationally connected via the first rotating shaft, the first arcuate rotating block can be provided with a first mounting groove, with the opening of the first mounting groove facing the second arcuate groove. The first rotating shaft is mounted in the first mounting groove, with a portion of the first rotating shaft surface contacting the groove surface of the first mounting groove, and a portion of the first rotating shaft surface contacting the groove surface of the second arcuate groove. By mounting the first rotating shaft in the open first mounting groove of the first arcuate rotating block so as to contact the groove surface of the second arcuate groove, the size of the first arcuate rotating block can be effectively reduced, eliminating the need to increase the thickness of the first mounting groove due to the size of the first rotating shaft, thereby facilitating a miniaturized design of the first rotating shaft mechanism.

[0028] In addition, the groove surface of the first mounting groove includes a first arc surface, and the surface of the first 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, when the first arc rotating block slides along the groove surface of the second arc groove, the first rotating shaft can rotate relative to the first arc rotating block to realize the rotational connection between the first swing arm and the first rotating shaft.

[0029] The groove surface of the second arc groove is the third arc surface, and the surface of the first 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 first rotating shaft slides along the groove surface of the second arc groove with the first arc rotating block, the first 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.

[0030] Similarly, the second arc-shaped rotating block is provided with a second mounting slot, the opening of which faces the fourth arc-shaped slot. The third rotating shaft is mounted in the open second mounting slot so as to contact the slot surface of the fourth arc-shaped slot. A portion of the third rotating shaft's surface contacts the slot surface of the second mounting slot, and a portion of the third rotating shaft's surface contacts the slot surface of the fourth arc-shaped slot. By mounting the third rotating shaft in the second mounting slot of the second arc-shaped rotating block, the size of the second arc-shaped rotating block can be effectively reduced, eliminating the need to increase the thickness of the second mounting slot due to the size of the third rotating shaft, thereby facilitating a miniaturized design of the first rotating shaft mechanism.

[0031] The second mounting groove may include a fifth arcuate surface, the surface of the third rotating shaft that contacts the groove surface of the second mounting groove may be a sixth arcuate surface, and the center of the fifth arcuate surface coincides with the center of the sixth arcuate surface. Alternatively, the groove surface of the fourth arcuate groove may be a seventh arcuate surface, and the surface of the third rotating shaft that contacts the groove surface of the fourth arcuate groove may be an eighth arcuate surface, and the center of the seventh arcuate surface coincides with the center of the eighth arcuate surface. Thus, while the third rotating shaft slides along the groove surface of the fourth arcuate groove with the second arcuate rotating block, it can also rotate relative to the second arcuate rotating block and the fourth arcuate groove, thereby facilitating movement of the second connecting member relative to the main shaft.

[0032] In one possible implementation of the present application, the first connecting member may include a plurality of first sub-connecting members that are sequentially rotatably connected. Furthermore, the plurality of first sub-connecting members may be located between the first swing arm and the first support arm, such that the first swing arm can be rotatably connected to adjacent first sub-connecting members, and the first support arm can be rotatably connected to adjacent first sub-connecting members. The connection between the first swing arm and the first support arm via the plurality of first sub-connecting members can effectively improve the speed uniformity of the first swing arm and the first support arm during rotation about the main axis, thereby enhancing the smoothness of the mutual pulling motion between the first swing arm and the first support arm.

[0033] Additionally, the second connecting member may include multiple second sub-connecting members that are sequentially rotatably connected. These multiple second sub-connecting members may be located between the second swing arm and the second support arm, allowing the second swing arm to be rotatably connected to adjacent second sub-connecting members, and the second support arm to be rotatably connected to adjacent second sub-connecting members. The connection between the second swing arm and the second support arm via the multiple second sub-connecting members effectively improves the speed uniformity of the second swing arm and the second support arm during rotation about the main axis, thereby enhancing the smoothness of the mutual pulling movement of the second swing arm and the second support arm.

[0034] In a possible implementation of the present application, the first rotating shaft mechanism also includes a first synchronization component, the first synchronization component includes a first gear connecting rod and a second gear connecting rod, the first gear connecting rod includes a first gear and a first connecting rod, the first gear is rotatably connected to the main shaft, and the first connecting rod is slidably connected to the first shell fixing frame. The second gear connecting rod includes a second gear and a second connecting rod, the second gear is rotatably connected to the main shaft, the second connecting rod is slidably connected to the second shell fixing frame, and the first gear and the second gear are transmission-connected. In this way, during the process of the first shell and the second shell moving from the expanded state to the closed state, or from the closed state to the expanded state, the synchronous reverse movement of the first shell fixing frame and the second shell fixing frame can be achieved, which is conducive to improving the stability of the movement of the first rotating shaft mechanism and can effectively reduce the risk of the flexible display screen of the electronic device being subjected to instantaneous compression or pulling stress, thereby improving the structural reliability of the flexible display screen.

[0035] In the present application, the first gear can be rotatably connected to the main shaft via the fifth rotating shaft, and the second gear can be rotatably connected to the main shaft via the sixth rotating shaft to improve the stability of the first gear connecting rod and the second gear connecting rod rotating around the main shaft.

[0036] In addition, in order to achieve a sliding connection between the first connecting rod and the first shell fixing frame, the first shell fixing frame can be further provided with a third sliding groove, and the first connecting rod can be installed in the third sliding groove and can slide in the third sliding groove relative to the first shell fixing frame in a direction toward or away from the base.

[0037] When the second connecting rod is slidably connected to the second housing fixing frame, the second housing fixing frame is further provided with a fourth sliding groove. The second connecting rod is installed in the fourth sliding groove and can slide relative to the second housing fixing frame in the fourth sliding groove toward or away from the base.

[0038] In one possible implementation of the present application, the second rotating shaft mechanism includes a second base and a second rotating module. The second rotating module may include a third rotating assembly and a fourth rotating assembly, with the third rotating assembly and the fourth rotating assembly being located on opposite sides of the second base. The third rotating assembly includes a third support arm, a third swing arm, and a third housing mounting bracket. The fourth rotating assembly includes a fourth support arm, a fourth swing arm, and a fourth housing mounting bracket. The third and fourth support arms are each rotationally connected to the second base, and the third and fourth swing arms are each rotationally connected to the base. The rotation axis of the third support arm and the rotation axis of the third swing arm are parallel but not coincident, while the rotation axis of the fourth support arm and the rotation axis of the fourth swing arm are parallel but not coincident. Furthermore, the third housing mounting bracket is fixedly connected to the second housing and is provided with a fifth slide extending in a first direction and a sixth slide extending in a second direction. This allows the third support arm to slide in the first direction within the fifth slide, and the third swing arm to slide in the sixth slide. Furthermore, the projection of the first direction onto the first cross-section is non-parallel to the projection of the second direction onto the first cross-section. The first cross-section serves as a reference plane perpendicular to the rotational axes of the third support arm and the third swing arm. Similarly, the fourth housing mounting frame is provided with a seventh slot extending along the third direction and an eighth slot extending along the fourth direction, such that the fourth support arm can slide within the seventh slot and the fourth swing arm can slide within the eighth slot. Furthermore, the projection of the third direction on the second cross-section is not parallel to the projection of the fourth direction on the second cross-section. The second cross-section serves as a reference plane perpendicular to the rotational axes of the fourth support arm and the fourth swing arm.

[0039] In the second hinge mechanism provided in the present application, by making the rotation axes of the third support arm and the third swing arm non-coincidental, and the rotation axes of the fourth support arm and the fourth swing arm non-coincidental, a phase difference in the axis of rotation between the support arm and the swing arm provided on the same side can be achieved during the rotation of the second hinge mechanism, thereby achieving the telescopic movement of the two rotating components, so that the second hinge mechanism can stably support the flexible display screen of the electronic device when in the extended state, and can form a teardrop-shaped screen-accommodating space that meets the bending requirements of the flexible display screen when the second hinge mechanism is in the closed state. In addition, in the present application, by rationally designing the opening directions of the fifth and sixth slide slots of the third shell fixing frame, and the opening directions of the seventh and eighth slide slots of the fourth shell fixing frame, the rotation angle of the third and fourth swing arms relative to the second base can be reduced. This allows the wall thickness design of the local structure of the third and fourth swing arms to meet the strength requirements, thereby improving the structural reliability of the third and fourth swing arms. When this second hinge mechanism is applied to electronic devices, it effectively avoids the need for thinning components within the electronic device to accommodate the rotation of the third and fourth swing arms, thereby improving the reliability of the overall structure of the electronic device. Furthermore, it reduces the risk of the third and fourth swing arms squeezing the flexible display screen of the electronic device, thereby reducing the risk of damage to the flexible display screen and extending its service life.

[0040] As can be seen from the above description of the rotational principle of the second rotating shaft mechanism provided by this application, by rationally designing the orientations of the fifth and sixth slots of the third housing mounting bracket, the rotational angles of the third support arm and the third swing arm relative to the second base can be adjusted. For example, the rotational angles of the third support arm and the third swing arm relative to the second base can be adjusted to no more than 90°. Similarly, by rationally designing the orientations of the seventh and eighth slots of the second housing mounting bracket, the rotational angles of the fourth support arm and the fourth swing arm relative to the second base can be adjusted to no more than 90°. This reduces the rotational angles of the third and fourth swing arms relative to the second base, thereby preventing other components of the second rotating shaft mechanism from compromising their rotation. This can facilitate increasing the wall thickness of local structures of the third and fourth swing arms, thereby improving the structural reliability of the third and fourth swing arms.

[0041] In the present application, various methods are available for the rotational connection of the third and fourth swing arms to the second base. For example, a fifth and sixth arcuate slots can be provided on the second base, and a third arcuate rotation block can be provided at one end of the third swing arm for rotational connection with the second base. The third arcuate rotation block can be accommodated in the fifth arcuate slot and can rotate along the arcuate surface of the fifth arcuate slot. Furthermore, a fourth arcuate rotation block can be provided at one end of the fourth swing arm for rotational connection with the second base. The fourth arcuate rotation block can be accommodated in the sixth arcuate slot and can rotate along the arcuate surface of the sixth arcuate slot. In this way, the third and fourth swing arms can be rotationally connected to the second base by accommodating the arcuate rotation blocks in the corresponding arcuate slots and rotating the arcuate rotation blocks along the arcuate surfaces of the arcuate slots. This allows the third and fourth swing arms to be rotationally connected to the second base via a virtual axis, effectively reducing the space occupied by the third and fourth swing arms on the second base, thereby facilitating a compact design of the second rotating shaft mechanism.

[0042] In one possible implementation of the present application, the sixth chute is provided with a second slideway, and the third swing arm is provided with a second slider. The second slider is engaged with the second slideway and can slide along the second slideway. This prevents the third swing arm from falling off the third housing mounting bracket, and the second slideway can provide guidance for the sliding of the third swing arm, thereby improving the reliability of the third swing arm sliding along the third housing mounting bracket.

[0043] Furthermore, the eighth chute is provided with a fourth slideway, and the fourth swing arm is provided with a fourth slider, which is engaged with the fourth slideway and can slide along the fourth slideway. This prevents the fourth swing arm from falling off the fourth housing mounting bracket, and the fourth slideway provides guidance for the sliding of the fourth swing arm, thereby improving the reliability of the fourth swing arm sliding along the fourth housing mounting bracket.

[0044] In one possible implementation of the present application, the third housing mount includes a first surface, which is a side surface of the third housing mount facing the flexible display screen of the electronic device. The second slider may be a linear slider. In this case, the second slideway can be adaptively configured as a linear slideway, with the linear slideway having an opening located on the first surface. In this case, when the second and third housings are in a flattened state, the linear slideway can extend from the opening toward the second base. This can improve the smoothness of the second slider sliding along the second slideway and effectively reduce interference with the movement of the third swing arm by other structures of the second hinge mechanism, thereby facilitating an increase in the wall thickness of the third swing arm. In another possible implementation of the present application, the linear slideway can also extend from the opening away from the second base. Alternatively, when the third housing mount also includes a second surface disposed opposite the first surface, the linear slideway can also extend from the opening toward a direction perpendicular to the second surface, thereby providing greater flexibility in the configuration of the second slideway.

[0045] In addition, the fourth shell fixing frame includes a third surface, which is the side surface of the fourth shell fixing frame facing the flexible screen. The fourth slider can be a linear slider. In this case, the fourth slide can be adaptively set as a linear slide, and the linear slide has an opening located on the third surface. In this case, when the second shell and the third shell are in the unfolded state, the linear slide can be extended from the opening toward the second base. This can help improve the smoothness of the sliding of the fourth slider along the fourth slide and effectively reduce the interference of other structures of the second rotating shaft mechanism on the movement of the fourth swing arm, thereby facilitating the increase of the wall thickness of the fourth swing arm. In another possible implementation of the present application, the linear slide can also be extended from the opening in a direction away from the second base; or, when the fourth shell fixing frame also includes a fourth surface disposed opposite to the third surface, the linear slide can also be extended from the opening in a direction perpendicular to the fourth surface, so that the setting of the fourth slide is more flexible.

[0046] In some possible implementations, the second slider may be configured as a curved slider, and the second slide may be adaptively configured as a curved slide, which can reduce the risk of the second slider escaping from the second slide, thereby facilitating improved reliability of the cooperation between the second slider and the second slide. In addition, the fourth slider may be configured as a curved slider, and the fourth slide may be adaptively configured as a curved slide, which can reduce the risk of the fourth slider escaping from the fourth slide, thereby facilitating improved reliability of the cooperation between the fourth slider and the fourth slide. It is understandable that the second slider may also be other shapes that are adapted to the curved slide, such as a slider that is integrally curved with a hollowed-out or spaced middle portion, or a slider of a special shape, as long as it can fit the shape of the curved slide and slide.

[0047] In addition, when the second and third shells are in a flattened state, the axis of the curved slide can be located on the side of the curved slide facing away from the second base. This can help improve the smoothness of the second slider sliding along the second slide, as well as the smoothness of the fourth slider sliding along the fourth slide, and can effectively reduce the interference of other structures of the second rotating shaft mechanism with the movement of the third and fourth swing arms, thereby facilitating an increase in the wall thickness of the third and fourth swing arms. In another possible implementation of the present application, when the second and third shells are in a flattened state, the axis of the curved slide can be located on the side of the curved slide facing the second base, thereby making the arrangement of the second and fourth slides more flexible.

[0048] In the present application, the second rotation module may further include a first drive link and a second drive link. The first drive link is disposed between the third support arm and the third swing arm, and the first drive link includes a first connecting portion and a second connecting portion, and the first connecting portion is rotationally connected to the third support arm via the third connecting portion, and the second connecting portion is rotationally connected to the third swing arm via the fourth connecting portion, wherein the axes of the third connecting portion and the fourth connecting portion do not overlap. Furthermore, the second drive link includes a third connecting portion and a fourth connecting portion, and the third connecting portion is rotationally connected to the fourth support arm via the fifth connecting portion, and the fourth connecting portion is rotationally connected to the fourth swing arm via the sixth connecting portion, wherein the axes of the fifth connecting portion and the sixth connecting portion do not overlap.

[0049] In this way, the degree of engagement between the third support arm and the third swing arm, as well as the fourth support arm and the fourth swing arm, and the corresponding slide slots can be effectively improved, thereby improving the consistency of the movement of the third support arm and the third swing arm, as well as the fourth support arm and the fourth swing arm, and making the movement of the third support arm and the third swing arm, as well as the fourth support arm and the fourth swing arm smoother. In addition, when an electronic device using the second rotating shaft mechanism falls in a closed state, the third support arm and the third swing arm can jointly support the corresponding housing of the electronic device, and the fourth support arm and the fourth swing arm can jointly support the corresponding housing of the electronic device, thereby preventing the two housings from moving relative to the second rotating shaft mechanism, thereby improving the reliability of the overall structure of the electronic device.

[0050] In addition to the above-described arrangement of the first and second drive links, in another possible implementation, the first drive link is located between the third support arm and the third swing arm, and includes a first connecting portion and a second connecting portion. The first connecting portion is slidably connected to the third swing arm via the third connecting portion, and the second connecting portion is fixedly connected to the third support arm. Furthermore, the second drive link is located between the fourth support arm and the fourth swing arm, and includes a third connecting portion and a fourth connecting portion. The third connecting portion is slidably connected to the fourth swing arm via a fifth connecting portion, and the fourth connecting portion is fixedly connected to the fourth support arm.

[0051] In order to achieve a sliding connection between the third connecting rod and the third swing arm, a first guide groove can be provided at the end of the third swing arm facing the third support arm, so that the third connecting rod can be inserted into the first guide groove and can slide along the groove surface of the first guide groove. In addition, the first driving connecting rod can be an integrally formed structure with the third support arm, thereby simplifying the structure of the second rotating module. Similarly, in order to achieve a sliding connection between the fifth connecting rod and the fourth swing arm, a second guide groove can be provided at the end of the fourth swing arm facing the fourth support arm, so that the fifth connecting rod can be inserted into the second guide groove and can slide along the groove surface of the second guide groove. In addition, the second driving connecting rod can be an integrally formed structure with the second support arm to simplify the structure of the second rotating module.

[0052] The first drive link and the second drive link adopt the setting method provided by this implementation method. By reasonably designing the first guide groove and the second guide groove, the degree of connection between the third support arm and the third swing arm, as well as the fourth support arm and the fourth swing arm and the corresponding slide groove can be improved, thereby improving the consistency of the movement of the third support arm and the third swing arm, as well as the fourth support arm and the fourth swing arm, and making the movement of the third support arm and the third swing arm, as well as the fourth support arm and the fourth swing arm smoother. In addition, when the electronic device using the second rotating shaft mechanism falls in a closed state, the third support arm, the third swing arm and the first drive link can jointly support the corresponding shell in the electronic device, and the fourth support arm, the fourth swing arm and the second drive link can jointly support the corresponding shell in the electronic device, thereby avoiding causing the two shells to have a large instantaneous displacement relative to the second rotating shaft mechanism, thereby improving the reliability of the overall structure of the electronic device.

[0053] In one possible implementation of the present application, the second hinge mechanism may further include a first support plate and a second support plate, the first support plate and the second support plate being disposed on either side of the second base. The first support plate is rotatably connected to the third housing mount, and the first support plate is slidably connected to the third support arm and / or the third swing arm. The second support plate is rotatably connected to the fourth housing mount, and the second support plate is slidably connected to the fourth support arm and / or the fourth swing arm. Furthermore, when the third and fourth housing mounts rotate toward each other, the end of the first support plate proximate the second base moves away from the second base, and the end of the second support plate proximate the second base moves away from the second base, thereby forming a triangular screen-holding space between the two support plates and the second base. Thus, when the second hinge mechanism is used in an electronic device and the electronic device is closed, the curved portion of the flexible display can be accommodated in the screen-holding space and assume a teardrop-like shape, which prevents pulling or squeezing of the flexible display, thereby reducing the risk of damage to the flexible display.

[0054] To enable the first support plate to rotate about the third housing fixing frame, a first rotation groove can be provided on the third housing fixing frame, and a first rotation portion can be provided on the first support plate. Thus, the first rotation portion can be mounted in the first rotation groove and can rotate along the groove surface of the first rotation groove. Similarly, to enable the second support plate to rotate about the fourth housing fixing frame, a second rotation groove can be provided on the fourth housing fixing frame, and a second rotation portion can be provided on the second support plate. Thus, the second rotation portion can be mounted in the second rotation groove and can rotate along the groove surface of the second rotation groove.

[0055] From the above introduction to the second rotating shaft mechanism, it can be known that when the two shell fixing frames rotate toward each other, the two support plates rotate around the corresponding shell fixing frames to form a screen space. In order to form a screen space between the two support plates that meets the bending requirements of the flexible display screen, the movement trajectory of the support plates can be reasonably designed. In one possible implementation of the present application, the first support plate can be provided with a first guide portion, and a third track groove is provided on the first guide portion. In addition, the third swing arm can be provided with a first guide structure, which can be inserted into the third track groove and can slide along the third track groove. And / or, the first guide structure is provided on the third support arm, and the first guide structure is inserted into the third track groove and can slide along the third track groove. Therefore, during the process of the third swing arm and / or the third support arm rotating around the second base, the first support plate can be driven to rotate around the third shell fixing frame, and the movement trajectory of the first support plate can be adjusted by sliding the first guide structure in the third track groove.

[0056] Similarly, the second support plate may be provided with a second guide portion, and a fourth track groove may be provided on the second guide portion. In addition, the fourth swing arm may be provided with a second guide structure, and the second guide structure may be inserted into the fourth track groove and may slide along the fourth track groove. And / or, the second guide structure is provided on the fourth support arm, and the second guide structure is inserted into the fourth track groove and may slide along the fourth track groove. Thus, in the process of the fourth swing arm and / or the fourth support arm rotating around the second base, the second support plate can be driven to rotate around the fourth shell fixing frame, and the movement trajectory of the second support plate can be adjusted by sliding the second guide structure in the fourth track groove. Thus, a screen space that meets the screen requirements can be formed between the two support plates.

[0057] In one possible implementation of the present application, the electronic device further includes a flexible display screen, which continuously covers the first housing, the first hinge mechanism, the second housing, the second hinge mechanism, and the third housing, and the flexible display screen is fixedly connected to the first housing, the second housing, and the third housing. When the electronic device provided by the present application is in a flattened state, the first housing, the first hinge mechanism, the second housing, the second hinge mechanism, and the third housing can jointly support the flexible display screen, thereby ensuring the integrity of the electronic device in the unfolded state and improving the light and shadow of the flexible display screen. During the process of the electronic device moving from the flattened state to the closed state, the first housing and the second housing rotate toward each other, driving a portion of the flexible display screen to rotate, and the second housing and the third housing rotate toward each other, driving another portion of the flexible display screen to rotate. The tendency of the stack of layers of the flexible display screen to shift under the action of the first and second housings is consistent with the tendency of the stack of layers of the flexible display screen to shift under the action of the second and third housings. This is conducive to balancing the amount of shift of the stack of layers of the flexible display screen, thereby reducing the risk of failure of the flexible display screen due to stack shift, thereby extending the service life of the flexible display screen and improving the structural reliability of the entire electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] FIG1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application in a flattened state;

[0059] FIG2 is a simplified diagram of a cross-sectional view of the electronic device shown in FIG1 taken along line AA;

[0060] FIG3 is a schematic structural diagram of the electronic device shown in FIG1 in a closed state;

[0061] FIG4 is a schematic structural diagram of an electronic device in an intermediate state provided by an embodiment of the present application;

[0062] FIG5 is another structural schematic diagram of an electronic device in an intermediate state provided by an embodiment of the present application;

[0063] FIG6 is another structural schematic diagram of an electronic device in an intermediate state provided by an embodiment of the present application;

[0064] FIG7 is another structural schematic diagram of an electronic device in an intermediate state provided by an embodiment of the present application;

[0065] FIG8 is a schematic diagram showing a connection relationship between the first housing, the second housing, and the first rotating shaft mechanism provided in an embodiment of the present application;

[0066] FIG9 is a schematic diagram of a partial structure of a first rotating shaft mechanism provided in an embodiment of the present application;

[0067] FIG10 is an exploded view of the first rotating shaft mechanism shown in FIG9 ;

[0068] FIG11 is a cross-sectional view of the first connecting member of the first rotating shaft mechanism provided by an embodiment of the present application when the electronic device is in an unfolded state;

[0069] FIG12 is a schematic structural diagram of a main shaft provided in an embodiment of the present application;

[0070] FIG13 is a schematic structural diagram of the first base of the main shaft shown in FIG12 ;

[0071] FIG14 is a schematic structural diagram of the first cover plate of the main shaft shown in FIG12 ;

[0072] FIG15 is a cross-sectional view of the first connecting member of the first rotating shaft mechanism provided by an embodiment of the present application when the electronic device is in a closed state;

[0073] FIG16 is a schematic structural diagram of a first connecting member provided in an embodiment of the present application;

[0074] FIG17 is a schematic diagram of the assembly structure of the first connecting member and the main shaft provided in an embodiment of the present application;

[0075] FIG18 is a BB cross-sectional view of the structure shown in FIG9 ;

[0076] FIG19 is a cross-sectional view of the first swing arm of the first rotating shaft mechanism provided by an embodiment of the present application when the first housing and the second housing are in a closed state;

[0077] FIG20 is a schematic structural diagram of a first rotating assembly provided in an embodiment of the present application;

[0078] FIG21 is a schematic structural diagram of a first swing arm provided in an embodiment of the present application;

[0079] FIG22 is a schematic diagram of the motion mechanism of the first rotating shaft mechanism provided in an embodiment of the present application;

[0080] FIG23 is a schematic diagram of a partial structure of a first rotating shaft mechanism provided in an embodiment of the present application;

[0081] FIG24 is a cross-sectional view of the synchronization assembly of the first rotating shaft mechanism provided by an embodiment of the present application when the first housing and the second housing are in an unfolded state;

[0082] FIG25 is a cross-sectional view of the synchronization assembly of the first rotating shaft mechanism provided by an embodiment of the present application when the first housing and the second housing are in a closed state;

[0083] FIG26 is a schematic diagram illustrating another connection relationship among the first housing, the second housing, and the first rotating shaft mechanism provided in an embodiment of the present application;

[0084] FIG27 is a schematic structural diagram of the structure shown in FIG26 in a closed state;

[0085] FIG28 is a schematic diagram of an exploded structure of a second rotating shaft mechanism provided in an embodiment of the present application;

[0086] FIG29 is an exploded view of a partial structure of a second rotating shaft mechanism provided in an embodiment of the present application;

[0087] FIG30 is a schematic diagram of a partial structure of a second rotating shaft mechanism provided in an embodiment of the present application;

[0088] FIG31 is a schematic structural diagram of a third swing arm provided in an embodiment of the present application;

[0089] FIG32 is a schematic diagram of a partial structure of a second rotating shaft mechanism provided in an embodiment of the present application;

[0090] FIG33 is a schematic structural diagram of a third housing fixing frame provided in an embodiment of the present application;

[0091] FIG34a is a schematic structural diagram of a second rotating shaft mechanism provided in an embodiment of the present application in a flattened state;

[0092] FIG34 b is a schematic diagram of a first cross section provided in an embodiment of the present application;

[0093] FIG34c is a schematic structural diagram of the second housing and the third housing provided in an embodiment of the present application in an intermediate state;

[0094] FIG34d is a schematic structural diagram of the second housing and the third housing provided in an embodiment of the present application in a closed state;

[0095] FIG35 is a schematic diagram of a mechanism in which a third support arm and a third swing arm slide relative to a third housing fixing frame according to an embodiment of the present application;

[0096] FIG36 is another structural schematic diagram of the third swing arm provided in an embodiment of the present application;

[0097] FIG37a is a schematic structural diagram of the second housing and the third housing provided in an embodiment of the present application when they are in a flattened state;

[0098] FIG37 b is another schematic diagram of the first cross section provided in an embodiment of the present application;

[0099] FIG37 c is another schematic diagram of the first cross section provided in an embodiment of the present application;

[0100] FIG37 d is another schematic diagram of the first cross section provided in an embodiment of the present application;

[0101] FIG38 is a schematic structural diagram of the second housing and the third housing provided in an embodiment of the present application when they are in an intermediate state;

[0102] FIG39 is a schematic structural diagram of the second housing and the third housing provided in an embodiment of the present application when they are in a closed state;

[0103] FIG40 a is a schematic diagram of the connection structure between the third support arm and the third swing arm provided in an embodiment of the present application;

[0104] FIG40 b is a schematic structural diagram of a first driving connecting rod provided in an embodiment of the present application;

[0105] FIG40c is a schematic structural diagram of a third support arm provided in an embodiment of the present application;

[0106] FIG41 is a cross-sectional view of the structure shown in FIG40a at CC;

[0107] FIG42 is a cross-sectional view at DD of the structure shown in FIG40a;

[0108] FIG43 is another schematic structural diagram of the third swing arm provided in an embodiment of the present application;

[0109] FIG44 a is a schematic diagram of another connection structure between the third support arm and the third swing arm provided in an embodiment of the present application;

[0110] FIG44 b is another structural schematic diagram of the third swing arm provided in an embodiment of the present application;

[0111] FIG44c is a schematic diagram of the structure of the connection between the first driving link and the third support arm provided in an embodiment of the present application;

[0112] FIG45 is a schematic structural diagram of a first support plate provided in an embodiment of the present application;

[0113] FIG46 is a schematic structural diagram of a first support plate supporting a flexible display screen according to an embodiment of the present application;

[0114] FIG47 is a cross-sectional view of a second rotating shaft mechanism provided in an embodiment of the present application;

[0115] FIG48 is a cross-sectional view of the second housing and the third housing provided in an embodiment of the present application in a closed state;

[0116] FIG49 is another partial structural diagram of the second rotating shaft mechanism provided in an embodiment of the present application;

[0117] FIG50 is a cross-sectional view of the second rotating shaft mechanism 2 at EE shown in FIG49;

[0118] FIG51 is a simplified structural diagram of an electronic device provided by an embodiment of the present application, in which the second housing and the third housing are in a flattened state;

[0119] FIG52 is a schematic structural diagram of the structure shown in FIG51 in a closed state;

[0120] FIG53 is a schematic diagram illustrating another connection relationship between the second housing, the third housing, and the second rotating shaft mechanism provided in an embodiment of the present application;

[0121] FIG54 is a schematic diagram of the structure shown in FIG53 when it is in a closed state;

[0122] FIG55 a is a simplified diagram of another cross-sectional view of the electronic device shown in FIG1 taken at AA;

[0123] FIG55 b is a schematic diagram of the stacked structure of the flexible display screen of the electronic device shown in FIG55 a ;

[0124] FIG56 a is a cross-sectional view of the electronic device shown in FIG3 at position FF;

[0125] FIG56 b is a schematic diagram of the stacked structure of the flexible display screen of the electronic device shown in FIG56 a ;

[0126] FIG57 a is a cross-sectional view of the electronic device shown in FIG4 at position GG;

[0127] FIG57 b is a schematic diagram of the stacked structure of the flexible display screen of the electronic device shown in FIG57 a ;

[0128] FIG58 a is a cross-sectional view of the electronic device shown in FIG5 at position II;

[0129] FIG58 b is a schematic diagram of the stacked structure of the flexible display screen of the electronic device shown in FIG58 a ;

[0130] FIG59 a is a cross-sectional view of the electronic device shown in FIG6 at JJ;

[0131] FIG59 b is a schematic diagram of the stacked structure of the flexible display screen of the electronic device shown in FIG59 a ;

[0132] FIG60 a is a schematic diagram of a laminated structure of a flexible display screen when an existing electronic device is in a closed state;

[0133] FIG60 b is a schematic diagram of another laminated structure of a flexible display screen when an existing electronic device is in a closed state.

[0134] Reference numerals:

[0135] 1-first rotating shaft mechanism; 1a-supporting surface of the first rotating shaft mechanism; 101-first rotating module; 1011-first rotating assembly;

[0136] 10111-first swing arm; 101111-first arc-shaped rotating block; 1011111-first recessed portion; 1011112-first mounting slot;

[0137] 10111121-first arc surface; 10112-first support arm; 10113-first connecting member; 101131-first rotating shaft;

[0138] 1011311-second arc surface; 1011312-fourth arc surface; 101132-second rotation axis; 101133-first arc surface;

[0139] 101134-second curved surface;

[0140] 1012-second rotating assembly; 10121-second swing arm; 101211-second arc-shaped rotating block; 1012111-second recessed portion;

[0141] 1012112 - second mounting slot; 10121121 - fifth arc surface; 10122 - second support arm; 10123 - second connecting member;

[0142] 101231-third rotation axis; 1012311-sixth arc surface; 1012312-eighth arc surface; 101232-fourth rotation axis;

[0143] 101233-third curved surface; 101234-fourth curved surface;

[0144] 1013-first housing fixing frame; 10131-first slide groove; 10132-first mounting portion; 10133-third slide groove;

[0145] 1014-second housing fixing frame; 10141-second slide groove; 10142-second mounting portion; 10143-fourth slide groove;

[0146] 102-main shaft; 1021-first base; 10211-first arcuate groove; 102111-groove surface of the first arcuate groove;

[0147] 10212 - second arcuate groove; 102121 - third arcuate surface; 10213 - third arcuate groove; 102131 - groove surface of the third arcuate groove;

[0148] 10214-fourth arc groove; 102141-seventh arc surface;

[0149] 1022 - first cover plate; 10221 - first protrusion; 102211 - surface of the first protrusion; 10222 - second protrusion;

[0150] 102221 - surface of the second protrusion; 10223 - first plug-in portion; 10224 - third protrusion; 102241 - surface of the third protrusion;

[0151] 10225- fourth protrusion; 102251- surface of the fourth protrusion;

[0152] 1023 - first track slot; 1024 - second track slot;

[0153] 103-first synchronization assembly; 1031-first gear connecting rod; 10311-first gear; 10312-first connecting rod;

[0154] 10313 - fifth rotating shaft; 1032 - second gear connecting rod; 10321 - second gear; 10322 - second connecting rod;

[0155] 10323 - sixth rotating shaft; 104 - first under-screen support member; 105 - second under-screen support member;

[0156] 2-second rotating shaft mechanism; 2a-supporting surface of the second rotating shaft mechanism; 201-second rotating module; 201a-third rotating assembly;

[0157] 201b-fourth rotating assembly; 2012-third supporting arm;

[0158] 20121-first slider; 20122-first mounting hole; 2013-third swing arm; 20131-third arc-shaped rotating block;

[0159] 20132 - second slider; 20133 - first guide structure; 20134 - first guide groove; 20135 - second mounting hole;

[0160] 2014-second cover plate; 20141-first arc-shaped protrusion; 20142-second arc-shaped protrusion;

[0161] 2015-third housing fixing frame; 2015a-first surface; 2015b-second surface; 20151-fifth slide groove;

[0162] 201511-first slide; 20152-sixth slide; 201521-second slide; 20153-first rotating slot;

[0163] 2016a - first driving link; 20161 - first connecting portion; 20162 - second connecting portion; 20163 - third connecting rod;

[0164] 20164-fourth connecting rod; 2016b-second driving connecting rod;

[0165] 2017-second synchronization assembly; 20171a-first driving gear; 20171b-second driving gear; 20172-driven gear;

[0166] 20173-intermediate shaft;

[0167] 2018-Damping assembly; 20181-Elastic member; 20182-Conjoined cam; 20183-Block;

[0168] 20184-circlip; 2019-fourth housing fixing frame; 2019a-third surface; 2019b-fourth surface; 20191-seventh slide;

[0169] 201911-third slide; 20192-eighth slide; 201921-fourth slide; 20193-second rotating slot;

[0170] 2020-fourth support arm; 202001-third slider; 2021-fourth swing arm; 202101-fourth arc-shaped rotating block;

[0171] 202102-fourth slider; 202103-second guide structure;

[0172] 202-first support plate; 202a-first plate surface; 202b-second plate surface; 20201-first rotating part;

[0173] 20202-first guide portion; 202021-third track groove;

[0174] 203 - second support plate; 2031 - second rotating portion; 2032 - second guide portion; 20321 - fourth track groove;

[0175] 204-screen space; 205-end cover; 206-second base;

[0176] 2061-pin; 2062-damping bracket;

[0177] 2063-fifth arc groove; 2064-sixth arc groove;

[0178] 3-first shell; 3a-support surface of the first shell;

[0179] 4-second shell; 4a-support surface of the second shell;

[0180] 5-third shell; 5a-support surface of the third shell;

[0181] 6-Flexible display screen; 601-First part; 602-Second part; 7-Camera module. DETAILED DESCRIPTION

[0182] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments 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 explained using 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 in the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0183] It should be noted that the following description sets forth specific details to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotations of the embodiments of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0184] The electronic device provided in the embodiment of the present application includes a mobile phone, a personal digital assistant (PDA), a tablet computer or other devices with a foldable function. In order to facilitate understanding of the electronic device provided in the embodiment of the present application, reference may first be made to FIG1 , which is a schematic structural diagram of an electronic device provided in the embodiment of the present application in a flattened state. In the embodiment shown in FIG1 , the electronic device is described as a tri-fold mobile phone as an example, and in other embodiments of the present application, the electronic device can also be set to a four-fold, five-fold or more folded form, and its specific setting method is similar to that of the tri-fold electronic device.

[0185] Continuing with FIG1 , the electronic device may include three housings, two hinge mechanisms, and a flexible display screen 6. For ease of explanation, the two hinge mechanisms are named the first hinge mechanism 1 and the second hinge mechanism 2, and the three housings are named the first housing 3, the second housing 4, and the third housing 5. The first hinge mechanism 1 is located between the first housing 3 and the second housing 4, and the first housing 3 and the second housing 4 are rotationally connected via the first hinge mechanism 1. The second hinge mechanism 2 is located between the second housing 4 and the third housing 5, and the second housing 4 and the third housing 5 are rotationally connected via the second hinge mechanism 2. When the electronic device is in use, the first housing 3 and the second housing 4 can rotate toward or away from each other under the action of the first hinge mechanism 1, and the second housing 4 and the third housing 5 can rotate toward or away from each other under the action of the second hinge mechanism 2, thereby enabling the electronic device to be closed and unfolded according to different usage scenarios.

[0186] As shown in FIG1 , when the electronic device is in a flat state, the first housing 3 , the first hinge mechanism 1 , the second housing 4 , the second hinge mechanism 2 , and the third housing 5 are sequentially arranged side by side.

[0187] Referring to Figure 2, Figure 2 is a simplified cross-sectional view taken at AA of the electronic device shown in Figure 1. In this electronic device, the first housing 3, second housing 4, third housing 5, and first hinge mechanism 1 and second hinge mechanism 2 each have a support surface facing a flexible display 6. The flexible display 6 can continuously cover the support surface 3a of the first housing, the support surface 1a of the first hinge mechanism, the support surface 4a of the second housing, the support surface 2a of the second hinge mechanism, and the support surface 5a of the third housing. The first hinge mechanism 1 and the second hinge mechanism 2 are each positioned corresponding to a bendable portion of the flexible display 6, and the flexible display 6 is fixedly connected to the support surface 3a of the first housing, the support surface 4a of the second housing, the support surface 2a of the second hinge mechanism, and the support surface 5a of the third housing, respectively, by methods including, but not limited to, adhesive bonding. When the electronic device is flattened, the support surface 3a of the first housing, the support surface 1a of the first hinge mechanism, the support surface 4a of the second housing, the support surface 2a of the second hinge mechanism, and the support surface 5a of the third housing can be connected to form a flat support surface, thereby providing a flat support for the flexible display 6.

[0188] It can be understood that when the electronic device is in a flat state, the flexible display screen 6 is completely exposed on the outside of the electronic device, and since the entire flexible display screen 6 is in a flat state at this time, the electronic device can meet the user's needs for large-screen display in this flat state.

[0189] Referring to Figure 3, Figure 3 is a schematic structural diagram of the electronic device shown in Figure 1 in a closed state. In an embodiment of the present application, when the electronic device is in a closed state, the first shell 3 and the third shell 5 can be folded on both sides of the second shell 4, respectively. This folding method can be regarded as a "Z"-shaped folding or an "S"-shaped folding. At this time, the portion of the flexible display 6 corresponding to the first shell 3 can be exposed on the folded outer side of the electronic device, while the portion of the flexible display 6 corresponding to the second shell 4 and the third shell 5 is hidden on the folded inner side of the electronic device. That is, the portion of the flexible display 6 corresponding to the first shell 3 can serve as an exterior surface of the electronic device in a closed state.

[0190] In the electronic device provided in the embodiment of the present application, the sizes of the first shell 3, the second shell 4 and the third shell 5 can be adjusted so that when the electronic device is in a closed state, a larger area of ​​the flexible display screen 6 can still be exposed to the outside of the electronic device, so that the electronic device can still perform multiple functions in the folded state. This can effectively reduce unnecessary folding operations of the electronic device, thereby helping to extend the service life of the flexible display screen 6 and each hinge mechanism.

[0191] Figure 4 is a schematic diagram of the electronic device shown in Figure 1 in an intermediate state. In this state, the flexible display 6 is completely exposed to the outside of the electronic device. However, the portion of the flexible display 6 corresponding to the first housing 3 faces away from the portions of the flexible display 6 corresponding to the second housing 4 and the third housing 5. This allows the electronic device to display on one side or both sides, depending on the user's needs.

[0192] In addition, referring to Figure 5, Figure 5 is another schematic diagram of the structure of the electronic device shown in Figure 1 in an intermediate state. Unlike Figure 4 above, in the electronic device shown in Figure 5, the first shell 3 and the second shell 4 are in a flattened state, and the third shell 5 is in a closed state relative to the second shell 4. In this state, the portion of the flexible display 6 corresponding to the first shell 3 is exposed to the outside of the electronic device, while the portion of the flexible display 6 corresponding to the second shell 4 and the third shell 5 is hidden inside the folded electronic device. In other words, the portion of the flexible display 6 corresponding to the first shell 3 and the side of the third shell 5 facing away from the flexible display 6 are facing the same side of the electronic device.

[0193] The electronic device provided in the embodiment of the present application further includes a camera module 7, which can be disposed in the third housing 5, with the main camera of the camera module 7 exposed on the side of the third housing 5 facing away from the flexible display screen 6. Based on this, when the electronic device is in the state shown in FIG5 , the user can activate the camera through the portion of the flexible display screen 6 corresponding to the first housing 3 and use the main camera to take a selfie, which can improve the convenience of the user taking a selfie with the main camera, thereby improving the user experience.

[0194] Figure 6 is a schematic diagram of another structure of the electronic device shown in Figure 1 in an intermediate state. In the state shown in Figure 6, the first shell 3 and the second shell 4 are in a flattened state, the third shell 5 is in an intermediate state relative to the second shell 4, and the angle between the support surface 300a of the third shell 5 and the support surface of the second shell 4 is greater than or equal to 90°. In this state, the flexible display 6 is completely exposed outside the folded outer side of the electronic device. Because the three shells of the electronic device form a triangular support structure, the three shells can form a bracket to provide stable support for the entire electronic device.

[0195] It can be understood that when the electronic device is in the state shown in Figure 6, the part of the flexible display screen 6 corresponding to the first shell 3 and the second shell 4 and the part of the flexible display screen 6 corresponding to the third shell 5 can display the same content at the same time, so that the electronic device can be displayed synchronously for different users in face-to-face positions, which is conducive to improving the user experience.

[0196] Referring to Figure 7, Figure 7 is another schematic diagram of the structure of the electronic device provided by an embodiment of the present application in an intermediate state. In this state, the angle between the support surface of the first shell 3 and the support surface of the second shell 4 is greater than or equal to 90°, and the angle between the support surface of the third shell 5 and the support surface of the second shell 4 is greater than 90°. At this point, the flexible display 6 is completely exposed outside the electronic device, and because a triangular support structure is formed between the second shell 4 and the third shell 5, it can provide stable support for the entire electronic device.

[0197] When the electronic device is in the state shown in Figure 7, the portion of the flexible display 6 corresponding to the first housing 3 and the portion of the flexible display 6 corresponding to the second housing 4 can simultaneously display the same content, allowing the electronic device to display content synchronously to different users facing each other. The portion of the flexible display 6 corresponding to the third housing 5 can serve as a keyboard area, allowing the user on one side of the electronic device to use the keyboard for input operations, which is conducive to improving the user experience.

[0198] From the above introduction to the application of the electronic device provided by this application in different scenarios, it can be understood that the electronic device can meet the application needs of users in various scenarios, which can help improve the user experience and further enhance the market competitiveness of the electronic device.

[0199] It is understandable that whether an electronic device can meet the folding requirements in different application scenarios depends largely on the structural design of the first hinge mechanism 1 and the second hinge mechanism 2. In this application, the specific design of the first hinge mechanism 1 and the second hinge mechanism 2 is not limited. As long as the first hinge mechanism 1 can realize the movement of the first shell 3 and the second shell 4 toward or away from each other, and the second hinge mechanism 2 can realize the movement of the second shell 4 and the third shell 5 toward or away from each other, and can ensure the uniformity of the force applied to the flexible display screen 6, it is within the scope of the embodiments of this application.

[0200] Next, an exemplary design of the first rotating shaft mechanism 1 of the electronic device provided in an embodiment of the present application is described in detail.

[0201] Referring to Figure 8, Figure 8 is a schematic diagram illustrating a connection relationship between the first housing 3, the second housing 4, and the first hinge mechanism 1 of the electronic device provided in the flattened state according to an embodiment of the present application. The first hinge mechanism 1 includes a first housing fixing frame 1013, a second housing fixing frame 1014, and a main shaft 102. The first housing fixing frame 1013 and the second housing fixing frame 1014 are respectively arranged on opposite sides of the main shaft 102. The first housing fixing frame 1013 is rotationally connected to the main shaft 102, and the second housing fixing frame 1014 is rotationally connected to the main shaft 102. The first housing fixing frame 1013 is fixedly connected to the first housing 3, and the second housing fixing frame 1014 is fixedly connected to the second housing 4, thereby realizing a rotational connection between the first housing 3 and the first hinge mechanism 1, and a rotational connection between the second housing 4 and the first hinge mechanism 1.

[0202] In order to realize the rotational connection between the first shell fixing frame 1013 and the second shell fixing member 1014 and the main shaft 102, the first rotating shaft mechanism 1 also includes a first rotating module 101. In the specific implementation, reference may be made to Figure 9, which is a schematic diagram of a partial structure of the first rotating shaft mechanism 1 provided in an embodiment of the present application. In the present application, the first rotating shaft mechanism 1 may include a first rotating module 101. The number of first rotating modules 101 in the first rotating shaft mechanism 1 is not limited in the present application. The first rotating shaft mechanism 1 may include only one first rotating module 101 or may include multiple first rotating modules 101. When the first rotating shaft mechanism 1 includes multiple first rotating modules 101, the multiple first rotating modules 101 may be arranged at intervals along the length direction of the first rotating shaft mechanism 1. In the present application, the length direction of the first rotating shaft mechanism 1 is the extension direction of the axis about which the first shell 3 and the second shell 4 rotate around the first rotating shaft mechanism 1. It can be understood that the first housing 3 and the second housing 4 are rotatably connected via the plurality of first rotating modules 101 , which can effectively improve the stability of the first housing 3 and the second housing 4 of the electronic device in rotation relative to the first rotating shaft mechanism 1 .

[0203] To facilitate understanding of the structure of the first rotating module 101, reference is made to FIG10 , which is an exploded view of the first rotating shaft mechanism 1 shown in FIG9 . The first rotating module 101 may include a first rotating assembly 1011 and a second rotating assembly 1012. Furthermore, in this application, the main shaft may serve as a supporting member for the first rotating assembly 1011 and the second rotating assembly 1012.

[0204] It is worth mentioning that in the embodiment of the present application, when there are multiple first rotating modules 101, the first rotating components 1011 and second rotating components 1012 of the multiple first rotating modules 101 can all use the same main shaft as the bearing component to improve the integration level of the first rotating shaft mechanism 1. In other possible embodiments of the present application, the first rotating shaft mechanism 1 can be provided with a main shaft corresponding to each first rotating module 101, so that the first rotating component 1011 and second rotating component 1012 of each first rotating module 101 use the corresponding main shaft as the bearing component.

[0205] Continuing with FIG10 , 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 are pulled against each other via the first connecting member 10113. 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.

[0206] In the present application, the first connecting member 10113 is movable relative to the main shaft 102. For a specific implementation, refer to Figure 11, which shows a cross-sectional view of the first connecting member 10113 of the first rotating shaft mechanism 1 provided in an embodiment of the present application, when the first and second housings are in a flattened state. The main shaft 102 may be provided with a first track groove 1023, along which the first connecting member 10113 can move, thereby limiting the movement trajectory of the first connecting member 10113.

[0207] Referring to FIG12 , FIG12 is a schematic diagram of the structure of a spindle 102 provided in an embodiment of the present application. The spindle may include a first base 1021 and a first cover plate 1022. The first cover plate 1022 is disposed on the first base 1021, and the outer surface of the first cover plate 1022 may serve as the exterior surface of the first rotating shaft mechanism 1. Referring to FIG13 , FIG13 is a schematic diagram of the structure of the first base 1021 of the spindle 102 shown in FIG12 . The first base 1021 may be provided with a first arcuate groove 10211. Referring to FIG11 and FIG13 , a first connecting member 10113 is received in the first arcuate groove 10211, and the first connecting member 10113 may slide along the groove surface 102111 of the first arcuate groove. Furthermore, referring to FIG14 , FIG14 is a schematic diagram of the structure of the first cover plate 1022 of the spindle 102 shown in FIG12 , and FIG14 is used to illustrate the structure of the first cover plate 1022 facing the first base 1021. The first cover plate 1022 includes a first protrusion 10221 , as shown in FIG11 . The first protrusion 10221 may be disposed toward the first arc-shaped groove 10211 . A gap exists between the surface 102211 of the first protrusion and the groove surface 102111 of the first arc-shaped groove. The gap serves as the first track groove 1023 .

[0208] Figure 15 is a cross-sectional view of the first connecting member 10113 of the rotating shaft mechanism provided in an embodiment of the present application when the first shell and the second shell are in a closed state. Reference can be made to Figures 11 and 15 together. In the process of the first shell and the second shell moving from a flattened 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 in the process of moving from a closed state to a flattened 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 shaft 102 according to the set trajectory.

[0209] 11 and 15 , it can be seen that when the first and second housings move from the flattened state to the closed state, or vice versa, the first swing arm 10111 and the first support arm 10112 can rotate about the main axis 102. Furthermore, because the first swing arm 10111 and the first support arm 10112 are mutually pulled by the first connecting member 10113, the first connecting member 10113 can also rotate relative to the first protruding surface 102211 and the groove surface 102111 of the first arcuate groove during its movement within the first track groove 1023, thereby improving the smoothness of the movement of the first rotating assembly 1011.

[0210] Referring to Figure 16 , Figure 16 is a schematic diagram of the structure of a 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 curved surface 101133 and a second curved surface 101134. To enable the first connecting member 10113 to rotate relative to the first raised surface 102211 and the groove surface 102111 of the first curved groove, the first curved surface 101133 and the second curved surface 101134 may be arcuate surfaces, with the center of the first curved surface 101133 coinciding with the center of the second curved surface 101134. The radii of the first curved surface 101133 and the second curved surface 101134 may be equal or different, and are not limited thereto 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 be rotated relative to the first raised surface 102211 and the groove surface 102111 of the first arc groove.

[0211] 11 and 15 , when the first shell and the second shell are in the flattened state as shown in FIG11 and the closed state as shown in FIG15 , the first curved surface 101133 of the first connecting member 10113 can abut against the surface 102211 of the first protrusion, and the second curved surface 101134 abuts against the groove surface 102111 of the first curved groove, so that the surface 102211 of the first protrusion and the groove surface 102111 of the first curved groove limit the first connecting member 10113 to the first track groove 1023, so that when the rotating shaft mechanism 1 is in the flattened state and the closed state, the position of the first connecting member 10113 is relatively stable and no virtual shaking occurs, thereby improving the reliability of the rotating shaft mechanism 1 in the above two states.

[0212] In this application, when the electronic device is in the flattened state as shown in FIG11 , the distance between the point where the first raised surface 102211 abuts the first curved surface 101133 and the point where the groove surface 102111 of the first arcuate groove abuts the second curved surface 101134 can be recorded as d1. When the electronic device is in the closed state as shown in FIG15 , the distance between the point where the first raised surface 102211 abuts the first curved surface 101133 and the point where the groove surface 102111 of the first arcuate groove abuts the second curved surface 101134 can be recorded as d2. Since the first curved surface 101133 of the first connecting member 10113 can abut against the surface 102211 of the first protrusion, and the second curved surface 101134 abuts against the groove surface 102111 of the first curved groove when the electronic device is in the flattened state and the closed state, when the first curved surface 101133 and the second curved surface 101134 are both circular arc surfaces, it can be concluded that d1=d2.

[0213] In the present application, the specific configuration of the first protruding surface 102211 and the groove surface 102111 of the first arcuate groove is not limited. For example, the first protruding surface 102211 can be a circular arc surface, and the groove surface 102111 of the first arcuate groove can be a circular arc surface. In addition, the center of the first protruding surface 102211 coincides with the center of the groove surface 102111 of the first arcuate groove. In other possible embodiments of the present application, the first protruding surface 102211 and the groove surface 102111 of the first arcuate groove can also be set as planes, so that the first track groove 1023 is a straight groove; or the first protruding surface 102211 and the groove surface 102111 of the first arcuate groove can also be curved surfaces of other shapes, so that the first track groove 1023 is a curved groove of any shape, all of which should be understood to fall within the scope of protection of the present application.

[0214] Continuing with FIG. 11 , in the present application, the spacing between the first raised surface 102211 and the groove surface 102111 of the first arcuate groove can be made equal at all locations, so that the first trajectory groove 1023 is a uniformly wide groove. In this case, during the transition between the first and second housings from a flattened state to a closed state, and vice versa, the first raised surface 102211 and the first arcuate surface 101133, as well as the groove surface 102111 of the first arcuate groove and the second arcuate surface 101134, are always in contact. This ensures that the motion trajectory of the first connecting member 10113 is consistent during the transition between the first and second housings from a flattened state to a closed state, and vice versa. This helps improve the stability of the movement of the first connecting member 10113, thereby improving the stability of the movement of the first rotating assembly 10111.

[0215] Referring to Figure 17 , Figure 17 is a schematic diagram of the assembly structure of the first connecting member 10113 and the main shaft 102 provided in an embodiment of the present application. In the present application, when the first track groove 1023 is a groove of equal width, and the first curved surface 101133 and the second curved surface 101134 are circular arc surfaces, the sum of the radius R1 of the first curved surface 101133 and the radius R1 of the second curved surface 101134 is equal to the distance D between the first raised surface 102211 and the groove surface 102111 of the first curved groove. Furthermore, to ensure smooth movement of the first connecting member 10113 within the first track groove 1023, a certain design gap may be retained between the first curved surface 101133 and the first raised surface 102211, and / or between the second curved surface 101134 and the groove surface 102111 of the first curved groove.

[0216] In some other possible embodiments of the present application, the motion trajectory of the first connecting member 10113 during the transition from the flattened state to the closed state between the first and second shells can be different from the motion trajectory of the first connecting member 10113 during the transition from the closed state to the flattened state between the first and second shells. Specifically, during the transition from the flattened state to the closed state between the first and second shells, the first curved surface 101133 abuts against the first raised surface 102211, and a gap exists between the second curved surface 101134 and the groove surface 102111 of the first curved groove. Furthermore, during the transition from the flattened state to the closed state between the first and second shells, the second curved surface 101134 abuts against the groove surface 102111 of the first curved groove, and a gap exists between the first curved surface 101133 and the first raised surface 102211. In this embodiment, the gaps between the surface 102211 of the first protrusion and the groove surface 102111 of the first arc-shaped groove may be different at different locations, so the first track groove 1023 may be a groove of non-uniform width.

[0217] As can be seen from the above description, 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. This 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 first rotating module 101, so as to facilitate the miniaturization of the rotating shaft mechanism 1. In addition, it can be understood that in the embodiment of the present application, when the first swing arm 10111 and the main shaft 102 are rotatably connected 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.

[0218] It is worth mentioning that in this application, a virtual axis refers to the axis of an arc-shaped structure, and two rotatably connected components can rotate relative to the virtual axis, and the position of the virtual axis is fixed as the two rotatably connected components rotate relative to each other. For example, as shown in Figure 18, Figure 18 is a BB cross-sectional view of the structure shown in Figure 9. The end of the first swing arm facing the first base 1021 can be provided with a first arc-shaped rotating block 101111. In addition, referring to Figure 13, the first base 1021 can be provided with a second arc-shaped groove 10212. The first arc-shaped rotating block 101111 can be accommodated in the second arc-shaped groove 10212, and the first arc-shaped rotating block 101111 can slide along the groove surface of the second arc-shaped groove 10212, thereby achieving the rotation of the first swing arm 10111 around the main shaft 102 by sliding the first arc-shaped rotating block 101111 along the arc surface of the second arc-shaped groove 10212. In addition, in the present application, the first arc-shaped rotating block 101111 can be, but is not limited to, a circular arc-shaped rotating block, and the second arc-shaped groove 10212 can be, but is not limited to, a circular arc-shaped groove. It is 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 can also be a circular arc surface, with the centers of the two circular arc surfaces coinciding.

[0219] Referring to Figures 14 and 18 together, the first cover plate 1022 may include a second protrusion 10222 arranged toward the second arc groove 10212, and 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, thereby limiting the first arc-shaped rotating block 101111 between the first cover plate 1022 and the first base 1021, which can effectively improve the stability of the first arc-shaped rotating block 101111 relative to the first base 1021.

[0220] It's worth noting that when the second arcuate groove 10212 is formed as an arc, the portion of the second protrusion's surface 102221 that contacts the first arcuate rotating block 101111 can also be an arc, with the centers of the two arcs coinciding. Furthermore, the surface of the first arcuate rotating block 101111 facing the second protrusion 10222 can be either flat or arcuate, as long as the first arcuate rotating block 101111 can rotate relative to the second protrusion 10222.

[0221] Reference may be made to Figure 19, which is a cross-sectional view of the first swing arm 10111 of the first rotating shaft mechanism 1 provided in an embodiment of the present application, when the first and second housings are in a closed state. In the present application, the first arcuate rotating block 101111 may also be provided with a first recessed portion 1011111, the opening of which is disposed toward the first cover plate 1022. Furthermore, the end of the first cover plate 1022 facing the first swing arm 10111 may be provided with a first plug-in portion 10223. In this 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 arcuate groove 10212 abuts against at least a portion 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 first base 1021, and improving the structural reliability of the entire rotating shaft mechanism 1.

[0222] It is worth mentioning that, in the present application, in addition to being rotatably connected to the main shaft 102 via a virtual shaft, the first swing arm 10111 can also be rotatably connected via a solid shaft, which can make the connection between the first swing arm 10111 and the main shaft 102 more reliable. It is understandable that when the first swing arm 10111 is rotatably connected to the main shaft 102 via 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 facing away from the flexible display screen.

[0223] In the present application, when the first swing arm 10111 is rotatably connected to the first connecting member 10113, reference can continue to be made to Figure 16. The first connecting member 10113 may include a first rotating shaft 101131 and a second rotating shaft 101132. The axis of the first rotating shaft 101131 is parallel to the axis of the second rotating shaft 101132 and does not overlap.

[0224] In addition, referring to Figure 20, Figure 20 is a schematic structural diagram of the first rotating assembly 1011 provided in an embodiment of the present application. The first connecting member 10113 is rotationally connected to the first swing arm 10111 via a first rotating shaft 101131, and the first connecting member 10113 is rotationally connected to the first support arm 10112 via a second rotating shaft 101132. This allows the first swing arm 10111 and the first support arm 10112 to engage in mutual pulling motion via the first connecting member 10113.

[0225] Referring to FIG. 21 , FIG. 21 is a schematic structural diagram of a first swing arm 10111 provided in an embodiment of the present application. The first arcuate rotating block 101111 of the first swing arm 10111 is provided with a first mounting groove 1011112. Referring to FIG. 18 and FIG. 21 , the notch of the first mounting groove 1011112 is disposed toward the second arcuate groove 10212, so that the first rotating shaft 101131 can be mounted in the first mounting groove 1011112. A portion of the surface of the first rotating shaft 101131 can contact the groove surface of the first mounting groove 1011112, and a portion of the surface of the first rotating shaft 101131 can contact the groove surface of the second arcuate groove 10212, thereby confining the first rotating shaft 101131 in the first mounting groove 1011112.

[0226] Continuing with reference to Figures 18 and 21 , the groove surface of the first mounting groove 1011112 may include a first arcuate surface 10111121, while the surface of the first rotating shaft 101131 that contacts the groove surface of the first mounting groove 1011112 is a second arcuate surface 1011311, and the center of the first arcuate surface 10111121 coincides with the center of the second arcuate surface 1011311. Furthermore, referring to Figure 13 , the groove surface of the second arcuate groove 10212 may be a third arcuate surface 102121. As shown in Figure 18 , the surface of the first rotating shaft 101131 that contacts the groove surface of the second arcuate groove 10212 may be a fourth arcuate surface 1011312, and the center of the third arcuate surface 102121 coincides with the center of the fourth arcuate surface 1011312. In this way, referring to Figures 18 and 19 together, while the first rotating shaft 101131 slides along the groove surface of the second arc-shaped 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.

[0227] In the present application, when the first connecting member is rotatably connected to the first support arm, as shown in FIG20 , the second rotating shaft 101132 can be simultaneously provided through the first connecting member 10113 and the first support arm 10112. This simplifies the connection between the first connecting member 10113 and the first support arm 10112, which helps simplify 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 curved surface 101133 and the second curved surface 101134 of the first connecting member 10113 are both circular arc surfaces, the center of the first curved surface 101133, the center of the second curved surface 101134, and the axis of the second rotating shaft 101132 coincide with each other.

[0228] It is understandable that in the first rotating shaft mechanism 1 provided in the embodiment of the present application, the first connecting member 10113 may include a plurality of first sub-connecting members that are rotatably connected in sequence. In addition, the plurality of first sub-connecting members may be located between the first swing arm 10111 and the first support arm 10112, so that the first swing arm 10111 can be rotatably connected to the adjacent first sub-connecting members, and the first support arm 10112 can be rotatably connected to the adjacent first sub-connecting members. The manner in which the first swing arm 10111 is rotatably connected to the adjacent first sub-connecting members, and the manner in which the first support arm 10112 is rotatably connected to the adjacent first sub-connecting members, can be specifically set with reference to the above description of the rotatable connection between the first swing arm 10111 and the first support arm 10112 and the first connecting member 10113, and will not be elaborated on here. In the present application, by setting the first connecting member 10113 as a plurality of first sub-connecting members that are connected in rotation 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 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.

[0229] Continuing with FIG. 10 , in the present application, the first swing arm 10111 is slidably connected to the first housing mounting bracket 1013. Specifically, the first housing mounting bracket 1013 is provided with a first slide groove 10131. The first slide groove 10131 extends in a first direction, and the first swing arm 10111 can be mounted in the first slide groove 10131 and slide within the first slide groove 10131 in the first direction. The first direction can be the direction in which the first housing mounting bracket 1013 moves toward or away from the first base 1021. Furthermore, to prevent the first swing arm 10111 from falling out of the first slide groove 10131, a first slideway can be provided on the wall of the first slide groove 10131, and a first slider can be provided on the first swing arm 10111. This allows the first slider to be engaged with the first slideway and slide along the first slideway, thereby limiting the position of the first swing arm 10111 within the first slide groove 10131. In addition, by arranging a first slideway on the groove wall of the first slide groove 10131, it can provide guidance for the sliding of the first swing arm 10111 along the first slide groove 10131, thereby improving the stability of the movement of the first swing arm 10111.

[0230] In the present application, the first support arm 10112 can be rotatably connected to the second housing fixing frame 1014. In a specific implementation, referring to Figure 10 , 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.

[0231] In the embodiment of the present application, the specific manner in which the end portion 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. For example, with continued reference to FIG10 , the second mounting portion 10142 may be provided with a first mounting hole, and the end portion of the first support arm 10112 facing the second housing fixing frame 1014 may be provided with a second mounting hole. Then, the end portion of the first support arm 10112 facing the first housing 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.

[0232] Referring to Figure 22, Figure 22 is a schematic diagram of the motion mechanism of the first rotating shaft mechanism provided in an embodiment of the present application. Based on the first rotating shaft mechanism 1 provided in the above embodiment of the present application, when the first shell and the second shell move from the flattened state to the closed state, the first shell fixing frame 1013 and the second shell fixing frame 1014 move toward each other. 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-shaped groove 10212, thereby driving the first connecting member 10113 to move toward the first swing arm 10111 within 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 the closed state to the flattened state, the first housing fixing frame 1013 and the second housing fixing frame 1014 move in opposite directions. When the first housing 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 within 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. The second housing fixing frame 1014 can then be driven to rotate clockwise around the main axis 102 via the first support arm 10112. This achieves the folding and unfolding functions of the hinge mechanism 1.

[0233] In order to ensure the stability of some existing hinge mechanisms, it is necessary to increase the thickness of the rotating assembly connected to the main shaft. This will make the main shaft and the hinge mechanism very thick. If the thickness is forcibly reduced, the strength of the rotating assembly will be easily weakened, which will greatly affect the reliability of the hinge mechanism and thus reduce the life of the electronic device. The above-mentioned first hinge mechanism 1 of the present application has a streamlined structure. Through the above-mentioned structural relationship, the cross-section of the first connecting member 10113 can be made smaller to shuttle through the first track groove 1023 of the main shaft 102. At the same time, because the first connecting member 10113 has a sufficient length to extend in the vertical axial direction and is connected to the first swing arm 10111 and the first support arm 10112 respectively, the reliability of the hinge mechanism 1 can be guaranteed. In this way, the thickness of the main shaft 102 and the thickness of the entire device can be reduced while maintaining the reliability of the first hinge mechanism 1, making the entire first hinge mechanism 1 light, thin and reliable.

[0234] Furthermore, since the first connecting member 10113 can move along a predetermined trajectory within the first trajectory groove 1023, it can prevent uncontrolled movement of the first connecting member 10113 during the entire folding and unfolding process, thereby preventing 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 first hinge mechanism 1. In some cases, through reasonable design of the first trajectory groove 1023, the outer tangent of the first hinge mechanism 1 can also maintain a constant length throughout the entire folding and unfolding process, thereby ensuring that the portion of the flexible display covering the surface of the first hinge mechanism 1 can also maintain a substantially constant length. This effectively prevents squeezing or pulling of the flexible display, thereby improving the structural reliability of the flexible display, and thereby improving the structural reliability of the electronic device.

[0235] Continuing with FIG. 10 , similar to the structure of the first rotating assembly 1011, when the second rotating assembly 1012 is specifically configured, the second rotating assembly 1012 is located between the first housing fixing frame 1013 and the second housing fixing frame 1014. Furthermore, the second rotating assembly 1012 may include a second swing arm 10121, a second support arm 10122, and a second connecting member 10123. The second connecting member 10123 is located between the second swing arm 10121 and the second support arm 10122, and is rotationally connected to the second swing arm 10121 and 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, the configuration may be similar to the above-described configuration of the first connecting member 10113 rotationally connected to the second swing arm 10121 and the second support arm 10122. For example, reference may be made to FIG16 , which may also be used to illustrate the structure of the second connecting member 10123 provided in an embodiment of the present application. The second connecting member 10123 may include a third rotating shaft 101231 and a fourth rotating shaft 101232, wherein the axis of the third rotating shaft 101231 is parallel to and does not overlap with the axis of the fourth rotating shaft 101232. The second connecting member 10123 and the second swing arm 10121 may be rotatably connected via the third rotating shaft 101231, and the second connecting member 10123 and the second support arm 10122 may be rotatably connected via the fourth rotating shaft 101232, thereby allowing the second swing arm 10121 and the second support arm 10122 to perform a pulling motion with each other via the second connecting member 10123.

[0236] In addition, referring to Figure 12 , the spindle 102 may be provided with a second trajectory groove 1024, along which the second connecting member 10123 can move, thereby limiting the movement trajectory of the second connecting member 10123. Specifically, referring to Figure 13 , the first base 1021 may be provided with a third arcuate groove 10213, in which the second connecting member 10123 is accommodated and can slide along the groove surface of the third arcuate groove 10213. Furthermore, referring to Figure 14 , the first cover plate 1022 includes a third protrusion 10224, which may be positioned toward the third arcuate groove 10213 of the first base 1021 in Figure 13 . A gap is formed between the surface 102241 of the third protrusion and the groove surface 102131 of the third arcuate groove, serving as the second trajectory groove 1024.

[0237] In the present application, as shown in FIG16 , the second connecting member 10123 may include a third curved surface 101233 and a fourth curved surface 101234. When the first shell and the second shell are in the flattened state and the closed state, the third curved surface 101233 of the second connecting member 10123 may abut against the surface 102241 of the third protrusion, and the fourth curved surface 101234 may abut against the groove surface 102131 of the third curved groove, so that the surface 102241 of the third protrusion and the groove surface 102131 of the third curved groove restrict the second connecting member 10123 to the second track groove 1024. This ensures that the position of the second connecting member 10123 is relatively stable when the rotating shaft mechanism 1 is in the flattened state and the closed state, and does not cause virtual position shaking, thereby improving the structural reliability of the first rotating shaft mechanism 1 in the above two states.

[0238] In the embodiment of the present application, the third curved surface 101233 of the second connecting member 10123 can be configured with reference to the first curved surface 101133 of the first connecting member 10113, and the fourth curved surface 101234 can be configured with reference to the second curved surface 101134 of the first connecting member 10113, which will not be described in detail herein. Furthermore, the second track groove 1024 can be configured with reference to the first track groove 1023. In short, the spacing between the third raised surface 102241 and the groove surface 102131 of the third curved groove is equal at all locations, so that the second track groove 1024 is a groove of uniform width. In this case, during the process of the electronic device moving from a flattened state to a closed state, and vice versa, the third raised surface 102241 and the third curved surface 101233, as well as the groove surface 102131 of the third curved groove and the fourth curved surface 101234, are always in contact. Thus, when the first and second housings move from a flattened state to a closed state, and vice versa, the second connecting member 10123 follows the same motion trajectory within the second trajectory groove 1024. Alternatively, when the first and second housings move from a flattened state to a closed state, the third curved surface 101233 abuts against the third raised surface 102241, and a gap exists between the fourth curved surface 101234 and the groove surface 102131 of the third curved groove. Furthermore, when the first and second housings move from a closed state to a flattened state, the fourth curved surface 101234 abuts against the groove surface 102131 of the third curved groove, and a gap exists between the third curved surface 101233 and the third raised surface 102241. This ensures that the motion trajectory of the second connecting member 10123 when the electronic device moves from a flattened state to a closed state is different from the motion trajectory of the second connecting member 10123 when the electronic device moves from a closed state to a flattened state.

[0239] 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. In a specific implementation, as shown in FIG13 , the first base 1021 can be provided with a fourth arcuate groove 10214. In addition, referring to FIG10 and FIG21 , FIG21 can also be used to illustrate the structure of the second swing arm 10121. A second arcuate rotating block 101211 is provided at one end of the second swing arm 10121 facing the first base 1021. The second arcuate rotating block 101211 can be, but is not limited to, a circular arcuate rotating block, and the fourth arcuate groove 10214 can be, but is not limited to, a circular arcuate 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, thereby achieving the rotation of the second swing arm 10121 about the first base 1021 through the sliding of 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 first rotating module 101, thereby facilitating the miniaturization of the hinge mechanism 1. It will be understood that in the embodiment of the present application, 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 about the main shaft 102 is located on the side of the first hinge mechanism 1 facing away from the flexible display screen.

[0240] Furthermore, in the present application, the second arc-shaped rotating block 101211 may be, but is not limited to, a circular arc-shaped rotating block, and the fourth arc-shaped groove 10214 may be, but is not limited to, a circular arc-shaped groove. It is understood that when the second arc-shaped rotating block 101211 is a circular arc-shaped rotating block, its surface for contact with 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 may also be a circular arc surface, with the centers of the two circular arc surfaces coinciding.

[0241] In the present application, in order to improve the stability of the second swing arm 10121 rotating about the main axis 102, as shown in FIG14 , the first cover plate 1022 further includes a fourth protrusion 10225 disposed toward the fourth arc-shaped 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-shaped 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, thereby confining the second arc-shaped rotating block 101211 between the first cover plate 1022 and the first base 1021. This can effectively improve the stability of the second arc-shaped rotating block 101211 rotating relative to the first base 1021. Furthermore, when the groove surface of the fourth arcuate groove 10214 is an arcuate surface, the portion of the surface 102251 of the fourth protrusion that contacts the second arcuate rotating block 101211 may also be an arcuate surface, with the centers of the two arcuate surfaces coinciding. In the present application, the surface of the second arcuate rotating block 101211 facing the fourth protrusion 10225 may be a flat surface or an arcuate surface, as long as the second arcuate rotating block 101211 can rotate relative to the fourth protrusion 10225 while sliding along the groove surface of the fourth arcuate groove 10214.

[0242] To enhance the reliability of the connection between the second swing arm 10121 and the first base 1021, the second arcuate rotating block 101211 may also be provided with a second recessed portion 1012111, the opening of which faces the first cover plate 1022. Furthermore, the end of the first cover plate 1022 facing the second housing fixing frame 1014 may be provided with a second plug-in portion. In the closed state, the second plug-in portion may be inserted into the second recessed portion 1012111, with the surface of the second plug-in portion facing the fourth arcuate slot 10214 abutting at least partially against the surface of the second recessed portion 1012111. This limits the rotational position of the second arcuate rotating block 101211, thereby preventing the second arcuate rotating block 101211 from dislodging from the fourth arcuate slot 10214.

[0243] It is worth mentioning that, in the present application, in addition to being rotatably connected to the main shaft 102 via a virtual shaft, the second swing arm 10121 can also be rotatably connected via a solid shaft, which can provide a more reliable connection between the first swing arm 10111 and the main shaft 102. In the embodiment of the present application, when the second swing arm 10121 is rotatably connected to the main shaft 102 via 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 first rotating shaft mechanism 1 facing away from the flexible display screen.

[0244] When the second connecting member 10123 is rotatably connected to the second swing arm 10121 through the third rotating shaft 101231, reference can be continued to Figure 15. The 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 set toward the fourth arc-shaped groove 10214. Then the third rotating shaft 101231 can be installed in the second mounting groove 1012112, and part of the surface of the third rotating shaft 101231 can contact the groove surface of the second mounting groove 1012112, and part of the surface of the third rotating shaft 101231 is in contact with 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.

[0245] As shown in FIG21 , in the present application, the groove surface of the second mounting groove 1012112 may include a fifth arcuate surface 10121121, and as shown in FIG16 , the surface of the third rotating shaft 101231 that contacts the groove surface of the second mounting groove 1012112 is a sixth arcuate surface 1012311, and the center of the fifth arcuate surface 10121121 coincides with the center of the sixth arcuate surface 1012311. Furthermore, the groove surface of the fourth arcuate groove 10214 is a seventh arcuate surface 102141, and the surface of the third rotating shaft 101231 that contacts the groove surface of the fourth arcuate groove 10214 may be an eighth arcuate surface 1012312, and the center of the seventh arcuate surface 102141 coincides with the center of the eighth arcuate 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 be rotated 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.

[0246] In the embodiment of the present application, when the second connecting member 10123 and the second support arm 10122 are rotatably connected through 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. Then, 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.

[0247] It is understandable that in the first 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, so that the second swing arm 10121 can be rotatably connected to the adjacent second sub-connecting member, and the second support arm 10122 can be rotatably connected to the adjacent second sub-connecting member. The manner in which the second swing arm 10121 is rotatably connected to the adjacent second sub-connecting member, and the manner in which the second support arm 10122 is rotatably connected to the adjacent second sub-connecting member, can be specifically set with reference to the above description of the rotatable connection between the second swing arm 10121 and the second support arm 10122 and the second connecting member 10123, and will not be elaborated on 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 the 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, thereby improving the smoothness of the mutual pulling movement of the second swing arm 10121 and the second support arm 10122.

[0248] In the present application, the second swing arm 10121 can be slidably connected to the second housing fixing frame 1014. In a 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 of the first rotating shaft mechanism 1. The second slide groove 10141 extends along a second direction. The second swing arm 10121 can be mounted in the second slide groove 10141 and can slide within 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 first base 1021. In addition, to prevent the second swing arm 10121 from falling out of 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 locked in the second slideway and slide along the second slideway to limit the second swing arm 10121 in the second slide groove 10141. In addition, by providing 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.

[0249] In addition, the second support arm 10122 can be rotatably connected to the first housing fixing frame 1013. In a specific embodiment, the first housing fixing frame 1013 has a first mounting portion 10132, which is spaced apart from the first slide groove 10131 along the length of the first rotating shaft mechanism 1. 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.

[0250] In the embodiment of the present application, the specific manner in which the end portion 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. For example, with continued reference to FIG10 , the first mounting portion 10132 may be provided with a third mounting hole, and the end portion of the second support arm 10122 facing the first housing fixing frame 1013 may be provided with a fourth mounting hole. Then, the end portion of the second support arm 10122 facing the first housing fixing frame 1013 may be rotatably connected to the first mounting portion 10132 via a rotating shaft that passes through both the third mounting hole and the fourth mounting hole.

[0251] Based on the first rotating shaft mechanism 1 provided in the above embodiment of the present application, when the first and second housings move from the flattened state to the closed state, the first housing fixing frame 1013 and the second housing fixing frame 1014 move toward each other. 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 within the second track groove 1024 of the main shaft 102. Because the second connecting member 10123 is rotationally connected to the second support arm 10122, when the second connecting member 10123 moves toward the second swing arm 10121 within the second track groove 1024 of the main shaft 102, it can drive the second support arm 10122 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. During the process of the first and second shells moving from the closed state to the flattened state, the first shell fixing frame 1013 and the second shell fixing frame 1014 move in opposite directions. When the second shell fixing frame 1014 drives the second swing arm 10121 to rotate clockwise around the main shaft 102, the second swing arm 10121 can drive the second connecting member 10123 to move in the second track groove 1024 of the main shaft 102 toward the second support arm 10122, thereby driving the second support arm 10122 to rotate counterclockwise around the main shaft 102. The second support arm 10122 drives the first shell fixing frame 1013 to rotate counterclockwise around the main shaft 102, thereby realizing the folding and unfolding functions of the first rotating shaft mechanism 1.

[0252] In order to ensure the stability of some existing hinge mechanisms, it is necessary to increase the thickness of the rotating assembly connected to the main shaft. This makes the main shaft and the hinge mechanism very thick and heavy. If the thickness is forcibly reduced, the strength of the rotating assembly will be easily weakened, which will greatly affect the reliability of the hinge mechanism and thus reduce the life of the electronic device. The above-mentioned first hinge mechanism 1 of the present application has a streamlined structure. Through the above-mentioned structural relationship, the cross-section of the second connecting member 10123 can be made smaller to shuttle through the second track groove 1024 of the main shaft 102. At the same time, because the second connecting member 10123 has a sufficient length extending in the direction perpendicular to the axis and is respectively connected to the second swing arm 10121 and the second support arm 10122, the reliability of the first hinge mechanism 1 can be guaranteed. In this way, the thickness of the main shaft 102 and the thickness of the entire device can be reduced while maintaining the reliability of the first hinge mechanism 1, making the entire first hinge mechanism 1 light, thin and reliable.

[0253] Since the second connecting member 10123 can move along a set trajectory, it can prevent the second connecting member 10123 from moving uncontrollably during the entire folding and unfolding process, thereby preventing the first shell fixing frame 1013 and the second shell fixing frame 1014 from moving randomly, thereby ensuring the structural and motion stability of the entire first hinge mechanism 1. In some cases, through the reasonable design of the second trajectory groove 1024, the outer tangent of the first hinge mechanism 1 can also maintain a constant length throughout the entire folding and unfolding process, thereby ensuring that the flexible display covering the surface of the first hinge mechanism 1 can also maintain a substantially constant length. In this way, squeezing or pulling of the flexible display can be effectively avoided, thereby improving the structural reliability of the flexible display, and thus improving the structural reliability of the electronic device.

[0254] Referring to Figure 23, Figure 23 is a schematic diagram of the partial structure of the first rotating shaft mechanism 1 provided in an embodiment of the present application, and the main shaft 102 is omitted in Figure 13 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, and the first support arm 10112 is rotatably connected to the second shell fixing frame 1014. 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, and the second support arm 10122 is rotatably connected to the first shell fixing frame 1013. The second swing arm 10121 can pull the second support arm 10122 to move along a set trajectory through the two connecting members 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 the distance between the first shell fixing frame 1013 and the second shell fixing frame 1014 and the main shaft 102 is equal when the first shell and the second shell are in any folded state. In addition, in the process of the first shell and the second shell moving from the flattened state to the closed state, and from the closed state to the flattened state, the distance of movement of the first shell fixing frame 1013 relative to the main shaft 102 can be equal, and the distance of movement of the second shell fixing frame 1014 relative to the main shaft 102 can be equal. Therefore, when the first hinge mechanism 1 is applied to an electronic device, the extension length of the support surface formed by the first shell 3, the second shell 4 and the first hinge mechanism 1 in the flattened state can be adapted to the flattened length of the corresponding part of the flexible display screen, and when the first shell and the second shell are in the closed state, the folding requirements of the part of the flexible display screen corresponding to the first hinge mechanism can be met, thereby avoiding deformation of the flexible display screen and reducing the extrusion 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.

[0255] It can be understood that, during the process of unfolding and closing the first shell and the second shell, by making the first shell 3 and the second shell 4 move synchronously, the risk of the flexible display screen being subjected to instantaneous squeezing or pulling stress can be effectively reduced. Based on this, the first hinge mechanism 1 provided in the embodiment of the present application may also include a first synchronization component 103. In specific implementation, refer to Figure 24, which is a cross-sectional view of the first hinge mechanism 1 provided in the embodiment of the present application at the first synchronization component 103 when the first shell and the second shell are in a flattened state. Among them, the first synchronization component 103 may include a first gear connecting rod 1031 and a second gear connecting rod 1032, and the first gear connecting rod 1031 and the second gear connecting rod 1032 are rotationally connected to the main shaft 102. In a specific implementation, the first gear connecting rod 1031 includes a first gear 10311 and a first connecting rod 10312. The first gear 10311 can be rotatably connected to the main shaft 102 via a fifth rotating shaft 10313 to enhance the stability of the first gear connecting rod 1031's rotation about the main shaft 102. The axis of the fifth rotating shaft 10313 extends in the same direction as the length of the rotating shaft mechanism 1. Furthermore, the first housing mount 1013 is further provided with a third sliding groove 10133, which is spaced apart from the first sliding groove 10131. The first connecting rod 10312 is mounted in the third sliding groove 10133 and can slide within the third sliding groove 10133 relative to the first housing mount 1013 in a direction toward or away from the first base 1021, thereby achieving a sliding connection between the first connecting rod 10312 and the first housing mount 1013.

[0256] Similarly, the second gear connecting rod 1032 may include a second gear 10321 and a second connecting rod 10322. The second gear 10321 may be rotatably connected to the main shaft 102 via a sixth rotating shaft 10323 to enhance the stability of the second gear connecting rod 1032's rotation about the main shaft 102. The axis of the sixth rotating shaft 10323 is parallel to the axis of the fifth rotating shaft 10313. In the present application, the second gear 10321 is in transmission connection with the first gear 10311. In the present application, the transmission connection between the second gear 10321 and the first gear 10311 may be achieved by meshing the second gear 10321 with the first gear 10311. Alternatively, an intermediate gear may be provided between the first gear 10311 and the second gear 10321, thereby achieving a transmission connection between the first gear 10311 and the second gear 10321 by meshing the first gear 10311 and the second gear 10321 with adjacent intermediate gears.

[0257] In addition, the second shell fixing frame 1014 is also provided with a fourth slide groove 10143, which is spaced apart from the second slide groove 10141. The second connecting rod 10322 is installed in the fourth slide groove 10143 and can slide in the fourth slide groove 10143 relative to the second shell fixing frame 1014 in the direction toward or away from the first base 1021, thereby realizing the sliding connection between the second connecting rod 10322 and the second shell fixing frame 1014.

[0258] Based on the above description of the structure of the first synchronizer assembly 103, reference may be made to Figures 24 and 25. Figure 25 is a cross-sectional view of the first synchronizer assembly 103 of the first rotating shaft mechanism 1 provided in an embodiment of the present application, when the first and second housings are in a closed state. When the first and second housings move from a flattened state to a closed state, the rotation of the first housing mount 1013 drives the first gear connecting rod 1031 to rotate about the first base 1021. Furthermore, because the first gear 10311 of the first gear connecting rod 1031 is in transmission connection with the second gear 10321 of the second gear connecting rod 1032, the rotation of the first gear connecting rod 1031 drives the second gear connecting rod 1032 to rotate in the same direction. The sliding of the second gear connecting rod 1032 along the fourth slot 10143 of the second housing mount 1014 drives the second housing mount 1014 to rotate in the same direction, thereby achieving synchronous, opposite-direction rotation of the first and second housing mounts 1013 and 1014. In addition, when the first shell and the second shell move from a closed state to a flattened state, the movement direction of each structure is opposite to the movement direction of the first shell 3 and the second shell 4 from a flattened state to a closed state in the above text, which will not be repeated here, thereby realizing the synchronous opposite rotation of the first shell fixing frame 1013 and the second shell fixing frame 1014.

[0259] The first rotating shaft mechanism 1 provided in the present application can realize its rotation function by pulling the connecting rods together, and can realize the synchronous rotation of the two housing fixing frames in the direction or opposite directions by setting the first synchronization component 103. In addition, since the structures of the mechanism for realizing the rotation function and the mechanism for realizing the synchronization function of the first rotating shaft mechanism 1 are relatively simple, it can effectively simplify the structure of the entire first rotating shaft mechanism 1, thereby facilitating the miniaturization design of the first rotating shaft mechanism 1 and reducing the cost of the first rotating shaft mechanism 1. Furthermore, since the mechanism for realizing the rotation function and the mechanism for realizing the synchronization function of the first rotating shaft mechanism 1 are two independent mechanisms, the failure of any one mechanism will not affect the realization of the function of the other mechanism, which can effectively improve the reliability of the first rotating shaft mechanism 1.

[0260] Some possible design methods of the first hinge mechanism 1 of the electronic device provided in the embodiment of the present application are introduced in detail above. On the basis of the design principle of the first hinge mechanism 1 mentioned above, some adaptive deformations can be made to the specific structure of the first hinge mechanism 1 according to actual applications. For example, referring to Figure 26, Figure 26 is a schematic diagram of another connection relationship between the first shell 3, the second shell 4 and the first hinge mechanism 1 of the electronic device provided in the embodiment of the present application in the flattened state. In the electronic device shown in Figure 26, the first hinge mechanism 1 also includes a first under-screen support 104 and a second under-screen support 105. The first under-screen support 104 is located between the first shell fixing frame 1013 and the main shaft 102, and the second under-screen support 105 is located between the second shell fixing frame 1014 and the main shaft 102. When the electronic device is in the flattened state shown in Figure 26, the first under-screen support 104 and the second under-screen support 105 are used to achieve flat support for the flexible display screen 6.

[0261] In addition, referring to Figure 27, Figure 27 is a schematic diagram of the structure shown in Figure 26 when it is in a closed state. With reference to Figures 26 and 27 together, it can be understood that when the first shell 3 and the second shell 4 are in the process of changing from the flattened state to the closed state, the first under-screen support member 104 and the second under-screen support member 105 rotate toward each other around the main axis 102. When the first shell 3 and the second shell 4 are in the closed state shown in Figure 27, the first under-screen support member 104 and the second under-screen support member 105 can be used to support the bent portion of the flexible display screen 6, which is conducive to improving the support reliability of the first hinge mechanism 1 for the flexible display screen 6.

[0262] It should be understood that in order to realize the form of the above-mentioned electronic device, in the present application, the design of the first rotating shaft mechanism 1 is not limited to that mentioned in the above embodiment, and any first rotating shaft mechanism 1 that can realize the following states is acceptable, namely:

[0263] When the first and second shells 3 and 4 are in the flattened state, the support surface 1a of the first hinge mechanism, the support surface 3a of the first shell, and the support surface 4a of the second shell work together to provide a smooth support for the flexible display 6. As the first and second shells 3 and 4 move from the flattened state to the closed state, they rotate toward each other, causing the flexible display 6 to bend. Furthermore, as the first and second shells 3 and 4 move from the closed state to the flattened state, they rotate away from each other, causing the flexible display 6 to unfold.

[0264] The exemplary design of the first hinge mechanism 1 of the electronic device provided in the embodiment of the present application has been described above. Next, the exemplary design of the second hinge mechanism 2 of the electronic device provided in the embodiment of the present application will be described in detail.

[0265] Referring to Figure 28, Figure 28 is a schematic diagram of an exploded structure of the second rotating shaft mechanism 2 provided in an embodiment of the present application. In the present application, the second rotating shaft mechanism 2 may include one second rotating module 201, or may include multiple second rotating modules 201. Exemplarily, the second rotating shaft mechanism 2 shown in Figure 28 includes three second rotating modules 201, and the three second rotating modules 201 may be arranged at intervals along the length direction of the second rotating shaft mechanism 2. In the present application, the length direction of the second rotating shaft mechanism 2 is the extension direction of the axis around which the second shell 4 and the third shell 5 rotate around the second rotating shaft mechanism 2. The second shell 4 and the third shell 5 can be rotatably connected through the multiple second rotating modules 201, which can effectively improve the stability of the second shell 4 and the third shell 5 of the electronic device in rotation relative to the second rotating shaft mechanism 2.

[0266] When specifically configuring the second rotating module 201, reference may be made to FIG29, which is an exploded view of a partial structure of the second rotating shaft mechanism 2 according to a possible embodiment of the present application. Referring to FIG28 and FIG29 together, in the present application, the second rotating module 201 may include a third rotating assembly 201a and a fourth rotating assembly 201b.

[0267] Referring to Figure 30 , Figure 30 is a schematic diagram of a partial structure of a second rotating shaft mechanism 2 provided in a possible embodiment of the present application. In the present application, the second rotating shaft mechanism 2 may further include a second base 206. Furthermore, referring to Figures 29 and 30 , the second base 206 may serve as a supporting component for the third rotating assembly 201a and the fourth rotating assembly 201b. The third rotating assembly 201a and the fourth rotating assembly 201b are disposed on either side of the second base 206, and the third rotating assembly 201a and the fourth rotating assembly 201b may be symmetrically arranged relative to the second base 206. For ease of description, in the following embodiments of the present application, the second rotating module 201 will be primarily described using the specific configuration of the third rotating assembly 201a and the connection relationship between the third rotating assembly 201a and the second base 206 as an example. The configuration of the fourth rotating assembly 201b may be similar to that of the third rotating assembly 201a.

[0268] It is worth mentioning that in one possible embodiment of the present application, when there are multiple second rotating modules 201, the third rotating components 201a and the fourth rotating components 201b of the multiple second rotating modules 201 can all use the same second base 206 as a supporting component, thereby improving the integration level of the second rotating shaft mechanism 2. In other possible embodiments of the present application, the second rotating shaft mechanism 2 can be provided with a second base 206 corresponding to each second rotating module 201, so that the third rotating component 201a and the fourth rotating component 201b of each second rotating module 201 use the corresponding second base 206 as a supporting component.

[0269] Continuing with FIG. 30 , in the present application, the third rotating assembly 201a may include a third support arm 2012, which may be rotatably connected to the second base 206. For example, the third support arm 2012 may be rotatably connected to the second base 206 via a pin 2061. In a specific implementation, the second base 206 may be provided with a damping bracket 2062, and the pin 2061 may be simultaneously provided through the damping bracket 2062 and the third support arm 2012, thereby enabling the third support arm 2012 to be rotatably connected to the second base 206 via the pin 2061.

[0270] It is worth mentioning that, in the present application, in addition to using the pin 2061 to achieve a rotational connection between the third support arm 2012 and the damping bracket 2062, in some possible embodiments, the third support arm 2012 can also use a virtual axis to achieve a rotational connection between the third support arm 2012 and the damping bracket 2062. For example, an arcuate groove can be provided on the damping bracket 2062, and an arcuate rotating block can be provided on the third support arm 2012, so that the arcuate rotating block slides along the groove surface of the arcuate groove to achieve rotation of the third support arm 2012 and the damping bracket 2062.

[0271] In the present application, the third rotating assembly 201a may further include a third swing arm 2013, which is rotatably connected to the second base 206. In one possible embodiment of the present application, the third swing arm 2013 and the second base 206 may be rotatably connected via a virtual axis. For example, see FIG31 , which is a schematic structural diagram of the third swing arm 2013 according to one possible embodiment of the present application. A third arc-shaped rotating block 20131 may be provided at one end of the third swing arm 2013 for connection to the second base 206.

[0272] In addition, reference can be made to FIG32, which is a schematic diagram of a partial structure of the second rotating shaft mechanism. The second base 206 may be provided with a fifth arcuate groove 2063. The third arcuate rotating block 20131 of the third swing arm 2013 shown in FIG31 may be accommodated in the fifth arcuate groove 2063 and rotate along the arcuate surface of the fifth arcuate groove 2063, thereby enabling the third swing arm 2013 to rotate about the second base 206. By rotatably connecting the third swing arm 2013 and the second base 206 via a virtual axis, it is possible to reduce the space occupied by the third swing arm 2013 on the second base 206, thereby reducing the volume of the second rotating module 201 and facilitating a miniaturized design of the second rotating shaft mechanism 2. It is worth noting that, in the present application, the third arcuate rotating block 20131 may be, but is not limited to, a circular arc-shaped rotating block, and the fifth arcuate groove 2063 may be, but is not limited to, a circular arc-shaped groove.

[0273] Continuing with FIG. 32 , the second rotating shaft mechanism 2 may further include a second cover plate 2014, which may be positioned over the second base 206 to form a housing space between the second cover plate 2014 and the second base 206. It is worth noting that, in the present application, a separate second cover plate 2014 may be provided for each second rotating module 201, providing greater structural flexibility. Alternatively, multiple second rotating modules 201 may share a single second cover plate 2014, simplifying the structure of the second rotating shaft mechanism 2. Furthermore, as shown in FIG. 32 , the surface of the second cover plate 2014 facing the fifth arcuate groove 2063 may be provided with a first arcuate protrusion 20141. The third arcuate rotating block 20131 of the third swing arm 2013 shown in FIG. 31 may be inserted between this first arcuate protrusion 20141 and the fifth arcuate groove 2063. Thereby, the first arc-shaped protrusion 20141 limits the third arc-shaped rotating block 20131 of the third swing arm 2013 to the fifth arc-shaped groove 2063 of the second base 206, so as to reduce the risk of the third swing arm 2013 falling off from the second base 206, thereby improving the reliability of the movement of the third swing arm 2013.

[0274] In another possible embodiment of the present application, the fifth arcuate groove 2063 can be an integrated channel structure directly formed on the second base 206. This allows for an integrated design of the second base 206, improving the structural reliability of the rotating shaft mechanism. Furthermore, the number of fifth arcuate grooves 2063 can be, but is not limited to, at least two. These at least two fifth arcuate grooves 2063 can be spaced apart along the length of the second base 206. These at least two fifth arcuate grooves 2063 can also limit the third arcuate rotating block 20131, thereby improving the reliability of the connection between the third arcuate rotating block 20131 and the second base 206.

[0275] In other embodiments of the present application, the third swing arm 2013 and the second base 206 may also be rotationally connected via a physical axis. For example, the third swing arm 2013 may be rotationally connected to the second base 206 via a pin. Thus, when the hinge mechanism includes multiple second rotating modules 201, the third swing arm 2013 of at least one of the multiple second rotating modules 201 may be rotationally connected to the second base 206 via a virtual axis, and the third swing arm 2013 of at least one second rotating module 201 may be rotationally connected to the second base 206 via a solid axis. In this case, the third swing arm 2013 of the second rotating module 201 positioned opposite the flexible display 6 of the electronic device may be rotationally connected to the second base 206 via a virtual axis, while the third swing arm 2013 of the main shaft assembly 101 located at both ends of the hinge mechanism in the longitudinal direction may be rotationally connected to the second base 206 via a physical axis.

[0276] 30 , in the present application, the third rotating assembly 201a may further include a third shell fixing frame 2015 , which is fixedly connected to the second shell 4 , and the third shell fixing frame 2015 may be connected to the third support arm 2012 and the third swing arm 2013 .

[0277] When specifically configuring the third housing mounting bracket 2015, reference may be made to FIG33 , which is a schematic structural diagram of the third housing mounting bracket 2015 according to a possible embodiment of the present application. In this embodiment, the third housing mounting bracket 2015 may be provided with a fifth chute 20151 extending along a first direction A. Referring to FIG30 and FIG33 , the third support arm 2012 may be mounted in and slide within the fifth chute 20151. The first direction A may be the direction in which the third housing mounting bracket 2015 moves toward or away from the second base 206. Furthermore, to prevent the third support arm 2012 from falling out of the fifth chute 20151, a first slideway 201511 may be provided on the wall of the fifth chute 20151, and a first slider 20121 may be provided on the third support arm 2012. In this way, the first slider 20121 can be locked in the first slide 201511 and can slide along the first slide 201511 to limit the position of the third support arm 2012 in the fifth slide groove 20151. In addition, by providing the first slide 201511 on the groove wall of the fifth slide groove 20151, it can provide a guide for the sliding of the third support arm 2012 along the fifth slide groove 20151, thereby improving the stability of the movement of the third support arm 2012.

[0278] Continuing with FIG33 , the third housing mount 2015 may further include a sixth slot 20152. The sixth slot 20152 may extend along the second direction B, with the fifth slot 20151 and the sixth slot 20152 spaced apart along the length of the third housing mount 2015. Referring also to FIG31 and FIG33 , the end of the third swing arm 2013 facing the third housing mount 2015 may be mounted in the sixth slot 20152, and the third swing arm 2013 may slide within the sixth slot 20152. It should be noted that, in the present application, the third housing mount 2015 may include a first surface 2015a and a second surface 2015b disposed opposite each other. The first surface 2015a may be the side surface of the third housing mount 2015 facing the flexible display 6 when the second hinge mechanism 2 is applied to the electronic device. The second direction B can be from the first surface 2015a to the second surface 2015b, or from the second surface 2015b to the first surface 2015a. In addition, the projection of the second direction B on the first section may not be parallel to the projection of the first direction A on the first section, wherein the first section may be a reference plane perpendicular to the rotation axis of the third support arm 2012 and the rotation axis of the third swing arm 2013.

[0279] 33 , in the present application, a second slideway 201521 may be provided within the sixth chute 20152, and a second slider 20132 may be provided on the third swing arm 2013 shown in FIG31 . In this manner, the second slider 20132 may be engaged with the second slideway 201521 and slidable within the second slideway 201521 along the second direction B, thereby limiting the position of the third swing arm 2013 within the sixth chute 20152 and preventing the third swing arm 2013 from falling out of the sixth chute 20152. Furthermore, by providing the second slideway 201521 on the wall of the sixth chute 20152, the second slideway 201521 may provide guidance for the sliding of the third swing arm 2013 along the sixth chute 20152, thereby improving the stability of the movement of the third swing arm 2013.

[0280] As can be seen from the above, in this application, the fourth rotating assembly 201b can be symmetrically arranged with the third rotating assembly 201a relative to the second base 206. In a specific implementation, referring to Figures 28 and 30, the fourth rotating assembly 201b may include a fourth housing fixing frame 2019, a fourth support arm 2020, and a fourth swing arm 2021. The fourth housing fixing frame 2019 is fixedly connected to the third housing 5 and has a third surface 2019a and a fourth surface 2019b disposed opposite each other. When the second hinge mechanism is used in an electronic device, the third surface 2019a is the side surface of the fourth housing fixing frame 2019 facing the flexible display 6. In addition, the fourth shell fixing frame 2019 may include a seventh slide groove 20191 extending along the third direction C and an eighth slide groove 20192 extending along the fourth direction D. The fourth support arm 2020 can slide in the seventh slide groove 20191, and the fourth swing arm 2021 can slide in the eighth slide groove 20192. The projection of the third direction C on the second section is not parallel to the projection of the fourth direction D on the second section. The second section is a reference plane perpendicular to the rotation axis of the fourth support arm 2020 and the rotation axis of the fourth swing arm 2021.

[0281] 29 , the seventh chute 20191 may be provided with a third slide 201911, the fourth support arm 2020 may be provided with a third slider 202001, the eighth chute 20192 may be provided with a fourth slide 201921, and the fourth swing arm 2021 may be provided with a fourth slider 202102. The configuration of the third slide 201911 may refer to the configuration of the first slide 201511, the configuration of the third slider 202001 may refer to the configuration of the first slider 20121, the configuration of the fourth slide 201921 may refer to the configuration of the second slide 201521, and the configuration of the fourth slider 202102 may refer to the configuration of the second slider 20132, which will not be described in detail herein.

[0282] In the present application, the fourth swing arm 2021 can be configured similarly to the third swing arm 2013 shown in FIG31 . To achieve a rotational connection between the fourth swing arm 2021 and the second base 206, the second base 206 includes a sixth arcuate groove 2064, and the fourth swing arm 2021 is provided with a fourth arcuate rotating block 202101 (see FIG29 ). Furthermore, with continued reference to FIG32 , the surface of the second cover plate 2014 facing the sixth arcuate groove 2064 can also be provided with a second arcuate protrusion 20142. The sixth arcuate groove 2064 can be configured similarly to the fifth arcuate groove 2063. The fourth arcuate rotating block 202101 can be configured similarly to the third arcuate rotating block 20131. The second arcuate protrusion 20142 can be configured similarly to the first arcuate protrusion 20141. Details thereof will not be further described herein.

[0283] After understanding the connection between the third rotating assembly 201a and the fourth rotating assembly 201b and the second base 206 provided in the above embodiment of the present application, the movement of the rotating shaft mechanism will be described below. First, reference may be made to Figure 34a, which illustrates a schematic structural diagram of the second rotating shaft mechanism in a flattened state. At this point, the edge of the third housing mounting bracket 2015 facing the second base 206 is closest to the second base 206, and the second slider 20132 of the third swing arm 2013 is closest to the first surface 2015a of the third housing mounting bracket 2015.

[0284] As can be seen from the above embodiment, when the second housing 4 and the third housing 5 rotate from the flat state to the closed state, the third support arm 2012 can slide in the first direction A within the fifth slide groove 20151, and the third swing arm 2013 can slide in the second direction B within the sixth slide groove 20152. Similarly, the fourth support arm 2020 can slide in the third direction C within the seventh slide groove 20191, and the fourth swing arm 2021 can slide in the fourth direction D within the eighth slide groove 20192.

[0285] In addition, reference may be made to FIG34b, which illustrates a schematic diagram of a first cross-section provided by a possible embodiment. Within this first cross-section, the first direction A and the second direction B intersect, and the angle of intersection between the first and second directions A and B may be an acute angle as shown, or may be another possible angle, such as a right angle or an obtuse angle. Furthermore, within the second cross-section, the positional relationship between the third direction C and the fourth direction D may be symmetrical with the positional relationship between the first and second directions A and B shown in FIG34b, which will not be further described here.

[0286] Referring to Figure 34c, Figure 34c illustrates the structure of the second housing 4 and the third housing 5 in an intermediate state. Comparing Figure 34c with Figure 34a, it can be seen that during this process, the third housing mounting bracket 2015 can move relative to the third support arm 2012 in a direction away from the second base 206, driving the third support arm 2012 and the third swing arm 2013 to rotate about the second base 206. The third arcuate rotating block 20131 of the third swing arm 2013 moves in a direction to slide out of the corresponding fifth arcuate slot 2063, thereby reducing the portion of the third arcuate rotating block 20131 accommodated within the corresponding fifth arcuate slot 2063. Simultaneously, the second slider 20132 of the third swing arm 2013 slides within the second slideway 201521 from the first surface 2015a of the third housing mounting bracket 2015 toward the second surface 2015b. Similarly, the fourth shell fixing frame 2019 can drive the fourth support arm 2020 and the fourth swing arm 2021 to rotate around the base. Its specific movement process is similar to the movement process of the third shell fixing frame 2015 driving the third support arm 2012 and the third swing arm 2013 to rotate around the second base 206, and will not be repeated here.

[0287] In addition, referring to Figure 34d, Figure 34d is a schematic diagram of the structure when the second housing 4 and the third housing 5 are in a closed state. During the transition from Figure 34c to Figure 34d, the third housing mounting frame 2015 continues to move relative to the third support arm 2012 in a direction away from the second base 206, driving the third support arm 2012 to rotate about the second base 206. The third arcuate rotating block 20131 of the third swing arm 2013 continues to move in a direction to slide out of the corresponding fifth arcuate slot 2063, thereby further reducing the portion of the third arcuate rotating block 20131 accommodated within the corresponding fifth arcuate slot 2063. Simultaneously, the second slider 20132 of the third swing arm 2013 continues to slide within the sixth slide slot 20152 in a direction toward the second surface 2015b of the third housing mounting frame 2015. Similarly, the fourth shell fixing frame 2019 can drive the fourth support arm 2020 and the fourth swing arm 2021 to continue rotating around the base. Its specific movement process is similar to the movement process of the third shell fixing frame 2015 driving the third support arm 2012 and the third swing arm 2013 to rotate around the second base 206, and will not be repeated here.

[0288] It can be understood that when the second shell 4 and the third shell 5 rotate from the closed state shown in Figure 34d to the flattened state shown in Figure 34a, the third shell fixing frame 2015, the third support arm 2012 and the third swing arm 2013, and the fourth shell fixing frame 2019, the fourth support arm 2020 and the fourth swing arm 2021 can respectively move in the opposite direction to the above-mentioned rotation process from Figure 34a to Figure 34d, which will not be repeated here.

[0289] Referring to Figure 35 , Figure 35 is a schematic diagram illustrating the mechanism for sliding the third support arm 2012 and the third swing arm 2013 relative to the third housing mounting bracket 2015, according to one embodiment of the present application. As can be seen from Figure 35 , with the second rotating shaft mechanism 2 provided herein, the rotational axes of the third support arm 2012 and the third swing arm 2013 do not coincide when they rotate about the second base 206. This allows for phase differentiation of the axes between the third support arm 2012 and the third swing arm 2013. Furthermore, by rationally designing the orientations of the fifth and sixth chute 20151 and 20152, the rotational angles of the third support arm 2012 and the third swing arm 2013 relative to the second base 206 can be maintained at no greater than 90°. Compared to existing solutions, this can effectively reduce the rotation angle of the third swing arm 2013. This allows the wall thickness design of the local structure of the third swing arm 2013 (e.g., the structure at position H of the third swing arm 2013 shown in FIG31 ) to meet strength requirements, thereby improving the structural reliability of the third swing arm 2013. It is understood that FIG35 can also be used to illustrate the mechanism principle of the sliding of the fourth support arm 2020 and the fourth swing arm 2021 relative to the fourth housing fixing frame 2019. From the above analysis, it can be seen that in this application, by rationally designing the opening directions of the seventh chute 20191 and the eighth chute 20192, the rotation angles of the fourth support arm 2020 and the fourth swing arm 2021 relative to the second base 206 can be no greater than 90°, thereby reducing the rotation angle of the fourth swing arm 2021 and allowing the wall thickness design of the local structure of the fourth swing arm 2021 to meet strength requirements, thereby improving the structural reliability of the fourth swing arm 2021. In addition, when the second rotating shaft mechanism 2 is used in an electronic device, it can also effectively avoid thinning the components in the electronic device to avoid the rotation of the third swing arm 2013 and the fourth swing arm 2021, which can improve the reliability of the overall structure of the electronic device.

[0290] 34d , when the second housing 4 and the third housing 5 are in the closed state, the third support arm 2012 and the third swing arm 2013 each exert a supporting force on the third housing fixing frame 2015 in the Z direction shown in FIG34d , which effectively improves the degree of motion coupling between the third support arm 2012, the third swing arm 2013, and the third housing fixing frame 2015, and serves as a stop in this direction for the third housing fixing frame 2015. Similarly, the fourth support arm 2020 and the fourth swing arm 2021 can also exert a supporting force on the fourth housing fixing frame 2019 in the Z direction, which effectively improves the degree of motion coupling between the fourth support arm 2020, the fourth swing arm 2021, and the fourth housing fixing frame 2019, and serves as a stop in this direction for the fourth housing fixing frame 2019. In this way, even if the electronic device using the hinge mechanism falls in the closed state, the risk of the third shell fixing frame 2015 and the fourth shell fixing frame 2019 undergoing instantaneous large displacement relative to the hinge mechanism in this state can be effectively reduced, thereby ensuring the reliability of the overall structure of the electronic device.

[0291] In the present application, the second slider 20132 of the third swing arm 2013 can be a linear slider as shown in Figure 31. In this case, the second slide 201521 can also be adaptively configured as a linear slide as shown in Figure 34a. In addition, the linear slide has an opening located on the first surface 2015a. When the rotating shaft mechanism is in the flattened state as shown in Figure 34a, the linear slide extends from the opening toward the second base 206. This improves the smoothness of the sliding of the second slider 20132 along the second slide 201521 and reduces interference with other structures of the rotating shaft mechanism on the third swing arm 2013, thereby facilitating an increase in the wall thickness of the third swing arm 2013 and improving the structural reliability of the third swing arm 2013. In other possible implementations of the present application, the linear slide can also extend from the opening in a direction away from the base, or can also extend from the opening in a direction perpendicular to the second surface 2015b, thereby making the configuration of the second slide 201521 more flexible. It is worth mentioning that in the present application, the second slider 20132 can also be other shapes that are adapted to the linear slide. For example, it can be a slider in an overall straight form with a hollowed-out, spaced, etc. design in the middle part, or it can be some special-shaped sliders. As long as the slider can fit the shape of the linear slide and slide, it can be any slider.

[0292] In the present application, the fourth slide 201921 can be symmetrically arranged with the second slide 201521. The specific arrangement thereof can be referred to that of the second slide 201521 and will not be described in detail here. In addition, the fourth slider 202102 can be a linear slider or any other shape that is compatible with a linear slide. For example, it can be an overall linear slider with a hollowed-out or spaced portion in the middle, or it can be any special-shaped slider. Any slider that can slide in the shape of a linear slide can be used.

[0293] In addition to the linear structure described above, the second slider 20132 of the third swing arm 2013 can also be designed as other possible structures. For example, referring to FIG. 36 , FIG. 36 is a schematic diagram of another structural embodiment of the third swing arm 2013 provided in the present application. In this embodiment, the second slider 20132 of the third swing arm 2013 can also be designed as a curved slider, which can be, for example, a circular arc. Furthermore, to enable the curved slider of the third swing arm 2013 to slide within the second slideway 201521 of the sixth chute 20152 of the third housing fixing frame 2015, the second slideway 201521 can also be adapted from the linear slideway shown in FIG. 34a to a curved slideway, which can be, for example, a circular arc. When the rotating shaft mechanism is in the flattened state, the axis of the curved slideway is located on the side facing away from the second base 206 of the curved slideway. This can help improve the smoothness of the sliding of the second slider 20132 along the second slideway 201521, and can achieve a 90° rotation angle of the third swing arm 2013 relative to the second base 206, thereby effectively reducing the interference of other structures of the rotating shaft mechanism on the movement of the third swing arm 2013, thereby facilitating the increase of the wall thickness of the third swing arm 2013. In addition, Figure 36 also shows the structure of the fourth swing arm 2021, and its specific configuration can refer to the above description of the third swing arm 2013, and will not be repeated here.

[0294] In this embodiment, the sliding of the third swing arm 2013 within the sixth chute 20152 and the sliding of the fourth swing arm 2021 within the eighth chute 20192 are equivalent to the sliding of the curved slider within the curved slideway. For specific implementation, reference may first be made to FIG37a, which illustrates the structure of the second housing 4 and the third housing 5 in a flattened state. At this point, the edge of the third housing mounting bracket 2015 facing the second base 206 is closest to the second base 206, and the second slider 20132 of the third swing arm 2013 is closest to the first surface 2015a of the third housing mounting bracket 2015.

[0295] As can be seen from the description of the above embodiment, when the second housing 4 and the third housing 5 rotate from the flattened state to the closed state, the third support arm 2012 can slide in the first direction within the fifth chute 20151, and the third support arm 2012 can slide in the second direction within the sixth chute 20152. Similarly, the fourth support arm 2020 can slide in the third direction within the seventh chute 20191, and the fourth swing arm 2021 can slide in the fourth direction within the eighth chute 20192. In Figure 37a, the first and third directions are indicated by solid arrows, respectively, and the second and fourth directions are indicated by dashed arrows. In addition, Figure 37b shows another schematic diagram of a first cross-section provided by an embodiment of the present application, in which the first and second directions intersect. Furthermore, in the second cross-section, the positional relationship between the third and fourth directions can be symmetrical with the positional relationship between the first and second directions shown in Figure 37b, which will not be further described here.

[0296] It should be noted that, in the present application, the projection of the second direction on the first section is not parallel to the projection of the first direction on the first section, and the projection of the fourth direction on the second section is not parallel to the projection of the third direction on the second section. In addition to referring to the intersection of the two as shown in Figures 34b and 37b, it can also refer to the two being in a tangent relationship as shown in Figure 37c, or a phase-separated relationship as shown in Figure 37d, which is not specifically limited in the present application.

[0297] As the second housing 4 and the third housing 5 rotate from the flattened state to the closed state, the third support arm 2012 can slide within the first chute in the first direction shown in FIG37a , and the third swing arm 2013 can slide within the second chute in the second direction shown in FIG37a . Furthermore, referring to FIG38 , FIG38 is a schematic diagram of the structure of the second housing 4 and the third housing 5 in an intermediate state. Comparing FIG38 with FIG37a , it can be seen that during this process, the third housing mounting bracket 2015 can move relative to the third support arm 2012 in a direction away from the second base 206 , driving the third support arm 2012 and the third swing arm 2013 to rotate about the second base 206 . The third arcuate rotating block 20131 of the third swing arm 2013 moves in a direction to slide out of the corresponding fifth arcuate slot 2063 , thereby reducing the portion of the third arcuate rotating block 20131 accommodated within the corresponding fifth arcuate slot 2063 . At the same time, the second slider 20132 of the third swing arm 2013 slides within the second slideway 201521 from the first surface 2015a of the third housing fixing frame 2015 toward the second surface 2015b. Similarly, the fourth housing fixing frame 2019 can drive the fourth support arm 2020 and the fourth swing arm 2021 to rotate about the base. The specific movement process is similar to the movement process of the third housing fixing frame 2015 driving the third support arm 2012 and the third swing arm 2013 to rotate about the second base 206, and will not be further described here.

[0298] Referring to Figure 39 , FIG39 is a schematic diagram illustrating the structure of the second housing 4 and the third housing 5 in a closed state. During the transition from FIG38 to FIG39 , the third housing mounting frame 2015 continues to move relative to the third support arm 2012 away from the second base 206, driving the third support arm 2012 and the third swing arm 2013 to continue rotating about the second base 206. The third arcuate rotating block 20131 of the third swing arm 2013 continues to move out of the corresponding fifth arcuate slot 2063, thereby further reducing the portion of the third arcuate rotating block 20131 accommodated within the corresponding fifth arcuate slot 2063. Simultaneously, the second slider 20132 of the third swing arm 2013 continues to slide within the second slideway 201521 toward the second surface 2015b of the third housing mounting frame 2015. Similarly, the fourth shell fixing frame 2019 can drive the fourth support arm 2020 and the fourth swing arm 2021 to continue rotating around the base. Its specific movement process is similar to the movement process of the third shell fixing frame 2015 driving the third support arm 2012 and the third swing arm 2013 to rotate around the second base 206, and will not be repeated here.

[0299] It can be understood that when the rotating shaft mechanism rotates from the closed state shown in Figure 39 to the flattened state shown in Figure 37a, the third shell fixing frame 2015, the third support arm 2012 and the third swing arm 2013, and the fourth shell fixing frame 2019, the fourth support arm 2020 and the fourth swing arm 2021 can respectively move in the opposite direction to the above-mentioned rotation process from Figure 37a to Figure 39, which will not be repeated here.

[0300] In some other possible embodiments of the present application, when the hinge mechanism is in the flattened state, the axis of the curved slideway may also be located on the side of the curved slideway facing the second base 206. Thus, during the rotation of the hinge mechanism from the flattened state to the closed state, the second slider 20132 of the third swing arm 2013 slides within the second slideway 201521 from the second surface 2015b of the third housing fixing frame 2015 in a direction toward the first surface 2015a. Furthermore, during the rotation of the hinge mechanism from the closed state to the flattened state, the second slider 20132 of the third swing arm 2013 slides within the second slideway 201521 from the first surface 2015a of the third housing fixing frame 2015 in a direction toward the second surface 2015b.

[0301] It is worth mentioning that, in the present application, when the second slide 201521 is an arc-shaped slide, the second slider 20132 can also be other shapes that adapt to the arc-shaped slide, for example, it can be an overall arc-shaped slider with a hollowed-out or spaced middle portion, or it can be some special-shaped slider, as long as it can slide in the shape of the arc-shaped slide. In addition, when the second slide 201521 is an arc-shaped slide, the sliding of the second slider 20132 within the second slide 201521 can also be understood as the second slider 20132 rotating around the third shell fixing frame 2015 via the arc-shaped slide.

[0302] In the present application, the fourth slide 201921 can be symmetrically arranged with the second slide 201521. The specific arrangement can refer to the second slide 201521 and will not be described in detail here. In addition, the fourth slider 202102 can be an arc-shaped slider or other shapes that are adapted to the arc-shaped slide. For example, it can be an overall arc-shaped slider with a hollowed-out, spaced, or other designed middle portion. It can also be some special-shaped sliders. As long as it can slide in the shape of the arc-shaped slide, it can be any slider. In addition, when the fourth slide 201921 is a circular arc-shaped slide, the sliding of the fourth slider 202102 in the fourth slide 201921 can also be understood as the fourth slider 202102 rotating around the fourth shell fixing frame 2019 through the circular arc-shaped slide.

[0303] In various embodiments of the present application, in order to improve the consistency and smoothness of the movement of the third support arm 2012 and the third swing arm 2013 located on the same side, as well as the degree of integration of the third support arm 2012 and the third swing arm 2013 with the corresponding chute, reference may be made to FIG40a, which shows a schematic diagram of the connection structure of the third support arm 2012 and the third swing arm 2013 provided in an embodiment of the present application. A first drive link 2016a may be provided between the third support arm 2012 and the third swing arm 2013, and the first drive link 2016a may be rotatably connected to the third support arm 2012 and the third swing arm 2013, respectively. For specific implementation, reference may be made to FIG40b, which shows a schematic diagram of the structure of the first drive link 2016a provided in a possible embodiment of the present application. The first drive link 2016a may include a first connecting portion 20161 and a second connecting portion 20162.

[0304] Referring to FIG40c , FIG40c illustrates a schematic structural diagram of a third support arm 2012 according to a possible embodiment of the present application. Referring also to FIG40b and FIG40c , in the present application, the first connecting portion 20161 of the first driving link 2016a may be connected to the first mounting hole 20122 of the third support arm 2012. The second connecting portion 20162 of the first driving link 2016a may be connected to the second mounting hole 20135 of the third swing arm 2013, as shown in FIG31 or FIG36 .

[0305] In addition, referring to Figure 41, which is a cross-sectional view taken at CC of the structure shown in Figure 40a. Also referring to Figures 40b and 40c, the first connecting portion 20161 is rotatably connected to the third support arm 2012 via the third connecting rod 20163, and the second connecting portion 20162 is rotatably connected to the swing arm 1013 via the fourth connecting rod 20164. It is worth noting that the axes of the third connecting rod 20163 and the fourth connecting rod 20164 do not overlap, thereby reducing the risk of interference with the respective movements of the third support arm 2012 and the third swing arm 2013.

[0306] By disposing the first drive link 2016a between the third support arm 2012 and the third swing arm 2013, when the hinge mechanism is in the closed state, the third support arm 2012, the third swing arm 2013, and the first drive link 2016a can jointly support the third housing fixing frame 2015, thereby effectively improving the degree of kinematic coupling between the third support arm 2012, the third swing arm 2013, and the third housing fixing frame 2015, while also acting as a stop for the third housing fixing frame 2015. In this way, even if an electronic device incorporating the hinge mechanism falls in the closed state, the risk of the third housing fixing frame 2015 undergoing significant instantaneous displacement relative to the hinge mechanism in this state can be effectively reduced, thereby ensuring the reliability of the overall structure of the electronic device.

[0307] To prevent the first drive link 2016a from overconstraining the movement of the third support arm 2012 and the third swing arm 2013, reference may also be made to FIG42 , which is a cross-sectional view taken at DD of the structure shown in FIG40a . In this embodiment, the second slider 20132 of the third swing arm 2013 can be thinned to allow for a clearance fit between the second slider 20132 of the third swing arm 2013 and the second slideway 201521 of the third housing fixing frame 2015. For specific implementation, reference may be made to FIG43 , which illustrates another schematic structural diagram of the third swing arm 2013 provided in an embodiment of the present application. In this embodiment, the thickness of the second slider 20132 of the third swing arm 2013 is reduced to allow for a clearance between the second slider 20132 and the sidewall of the second slideway 201521 shown in FIG42 . In this case, the shape of the second slider 20132 can be matched to the shape of the second slideway 201521. For example, if the second slideway 201521 is a rectangular slideway, the second slider 20132 can be configured as a rectangular slider. Alternatively, the second slider 20132 can be configured as a pin, so that the second slider 20132 can slide within the second slideway 201521 while also rotating relative to the second slideway 201521. This can increase the freedom of movement of the third swing arm 2013 as the second slider 20132 slides along the second slideway 201521, while also ensuring the reliability of the fit between the third swing arm 2013 and the sixth slide groove 20152 of the third housing fixing frame 2015.

[0308] It should be noted that in the above embodiment, the first driving link 2016a is rotatably connected to the third support arm 2012 via the third link 20163, and is rotatably connected to the third swing arm 2013 via the fourth link 20164. Thus, a four-bar linkage is formed by the third support arm 2012, the third link 20163, the third swing arm 2013, and the fourth link 20164. It will be appreciated that by adjusting the lengths of the various components of the four-bar linkage, the resulting four-bar linkage can be configured as a parallelogram or a non-parallelogram.

[0309] In addition to the arrangement of the first drive link 2016a in the aforementioned embodiment, FIG. 44a illustrates another schematic diagram of a connection structure between the third support arm 2012 and the third swing arm 2013 in accordance with an embodiment of the present application. In this embodiment, the first drive link 2016a is also positioned between the third support arm 2012 and the third swing arm 2013. Unlike the aforementioned embodiment, in this embodiment, the first connecting portion 20161 of the first drive link 2016a is slidably connected to the third swing arm 2013 via the third connecting rod 20163, while the second connecting portion 20162 is fixedly connected to the third support arm 2012.

[0310] Referring to FIG44 b , FIG44 b is another schematic diagram of the structure of the third swing arm 2013 provided in an embodiment of the present application. Referring to FIG44 a and FIG44 b together, the end of the third swing arm 2013 facing the third support arm 2012 may be provided with a first guide groove 20134, and the third connecting rod 20163 may be inserted into the first guide groove 20134 and slide along the groove surface of the first guide groove 20134, thereby achieving a sliding connection between the third connecting rod 20163 and the third swing arm 2013.

[0311] In addition, referring to Figure 44c, Figure 44c shows a schematic structural diagram of the connection between the first drive link 2016a and the third support arm 2012. In the present application, the second connection portion 20162 of the first drive link 2016a can be fixedly connected to the third support arm 2012 by bonding or threading. In other possible embodiments of the present application, the first drive link 2016a and the third support arm 2012 can also be integrally formed.

[0312] It can be understood that in some possible embodiments of the present application, the first drive link 2016a can also be slidably connected to the third support arm 2012 and fixedly connected to the third swing arm 2013. The specific setting method is similar to the above-mentioned embodiment in which the first drive link 2016a is slidably connected to the third swing arm 2013 and fixedly connected to the third support arm 2012, and will not be repeated here.

[0313] By adopting this arrangement, the first driving link 2016a can be reasonably designed through the first guide groove 20134 to improve the degree of engagement between the third support arm 2012 and the third swing arm 2013 and the corresponding slide grooves, thereby improving the consistency of the movement of the third support arm 2012 and the third swing arm 2013 and making the movement of the third support arm 2012 and the third swing arm 2013 smoother. In addition, when an electronic device using this hinge mechanism falls while in a closed state, the third support arm 2012, the third swing arm 2013, and the first driving link 2016a can jointly support the housing of the electronic device, thereby preventing the housing from experiencing a large instantaneous displacement relative to the hinge mechanism, thereby improving the reliability of the overall structure of the electronic device.

[0314] In addition, in this embodiment, in order to avoid the setting of the first drive link 2016a causing excessive constraints on the movement of the third support arm 2012 and the third swing arm 2013, the second slider 20132 of the third swing arm 2013 can also be designed to be thinned so that the second slider 20132 of the third swing arm 2013 and the second slide 201521 of the third shell fixing frame 2015 are clearance-matched. The specific setting method can refer to the above embodiment and will not be repeated here.

[0315] It is worth mentioning that, with reference to FIG34a , in the fourth rotating assembly 201b , a second driving link 2016b may be provided between the fourth support arm 2020 and the fourth swing arm 2021. The second driving link 2016b may include a third connecting portion (not shown in FIG34a ) and a fourth connecting portion (not shown in FIG34a ). The third connecting portion may be connected to the fourth swing arm 2021, and the fourth connecting portion may be connected to the fourth supporting arm 2020. The specific configuration of the second driving link 2016b, the connection between the third connecting portion and the fourth swing arm 2021, and the connection between the fourth connecting portion and the fourth supporting arm 2020 may all be configured with reference to the configuration on the side of the first rotating assembly 1011 . For example, the third connecting portion is rotationally connected to the fourth support arm via a fifth connecting rod, and the fourth connecting portion is rotationally connected to the fourth swing arm via a sixth connecting rod. The axes of the fifth connecting rod and the sixth connecting rod are parallel and do not overlap, etc. A detailed description thereof will not be given herein.

[0316] 28 , in the present application, the second rotating shaft mechanism 2 may further include a first support plate 202 and a second support plate 203 in addition to the above-mentioned structure. The first support plate 202 and the second support plate 203 may be separately arranged on opposite sides of the second base 206 as shown in FIG30 . In the present application, the first support plate 202 and the second support plate 203 may be symmetrically arranged relative to the second base 206 . In the following embodiments, the specific arrangement of the first support plate 202 and the connection relationship between the first support plate 202 and the second base 206 are mainly used as examples for explanation, and the second support plate 203 side may be arranged with reference to the first support plate 202 side.

[0317] In the present application, the first support plate 202 is rotatably connected to the third housing fixing frame 2015. It should be noted that in the present application, the first support plate 202 can be rotatably connected to multiple third housing fixing frames 2015 of multiple second rotating modules 201, which is conducive to simplifying the structure of the second rotating shaft mechanism 2 and improving the structural reliability of the second rotating shaft mechanism 2.

[0318] When specifically rotatably connecting the first support plate 202 and the third housing fixing frame 2015, reference can be made to the third housing fixing frame 2015 shown in FIG. The third housing fixing frame 2015 can also be provided with a first rotation groove 20153, which can be an arc-shaped groove. Furthermore, reference can be made to FIG. 45, which is a schematic structural diagram of the first support plate 202 provided in an embodiment of the present application. The end of the first support plate 202 facing the third housing fixing frame 2015 can be provided with a first rotation portion 20201, which can be configured as an arc, exemplarily a circular arc. Thus, the first rotation portion 20201 can be mounted in the first rotation groove 20153, and relative rotation between the first support plate 202 and the third housing fixing frame 2015 can be achieved by rotating the first rotation portion 20201 along the groove surface of the first rotation groove 20153.

[0319] Continuing with FIG45 , the first support plate 202 includes a first plate surface 202a and a second plate surface 202b disposed opposite each other, wherein the first plate surface 202a can be used to support the flexible display screen 6. For specific implementation, please refer to FIG46 , which is a schematic diagram of the structure of the first support plate 202 supporting the flexible display screen 6 according to an embodiment of the present application. In FIG21 , the electronic device is in a flattened state. At this time, the first plate surface 202a of the first support plate 202 and the surface of the cover plate (not shown in FIG45 ) facing the flexible display screen 6 can be in the same plane, thereby achieving flat support for the flexible display screen 6.

[0320] Referring to Figure 47, Figure 47 is a cross-sectional view of the second rotating shaft mechanism 2 provided in an embodiment of the present application. Figure 47 can be used to illustrate the structure of the second plate surface 202b of the first support plate 202, as well as the connection relationship between the first support plate 202 and other structures. Specifically, the second plate surface 202b of the first support plate 202 can be provided with a first guide portion 20202, and the first guide portion 20202 can be provided with a third track groove 202021. In addition, in the present application, the third swing arm 2013 can also be provided with a first guide structure 20133. The first guide structure 20133 can be, but is not limited to, a columnar structure. The first guide structure 20133 can be inserted into the third track groove 202021 of the first guide portion 20202 of the first support plate 202 and can slide along the third track groove 202021. Thus, as the third swing arm 2013 rotates around the second base 206, the first guide structure 20133 slides within the third track groove 202021, driving the first support plate 202 to rotate around the corresponding third housing mount 2015. For example, when the two housing mounts rotate toward each other, the two swing arms rotate toward each other around the second base 206, thereby driving the ends of the two support plates closest to the second base 206 to move away from the second base 206. Referring to Figure 48, Figure 48 shows that when the second housing 4 and the third housing 5 are in a closed state, the first support plate 202, the second support plate 203, and the second cover plate 2014 form a screen-receiving space 204, within which the bent portion of the flexible display 6 can be accommodated. This prevents compression of the flexible display 6, thereby reducing the risk of damage to the flexible display 6.

[0321] In another possible embodiment of the present application, the first support plate 202 can be driven to rotate about the housing fixing frame 1015 by the third support arm 2012. Specifically, the second plate surface 202b of the first support plate 202 can be provided with a first guide portion 20202, which can be provided with a third track groove 202021. Furthermore, a first guide structure 20133 can be provided on the third support arm 2012. The first guide structure 20133 can be, but is not limited to, a columnar structure. The first guide structure 20133 can be inserted into the third track groove 202021 of the first guide portion 20202 of the first support plate 202 and can slide along the third track groove 202021. Thus, as the third support arm 2012 rotates about the second base 206, the sliding of the first guide structure 20133 within the third track groove 202021 can drive the first support plate 202 to rotate about the third housing fixing frame 2015. In some possible embodiments of the present application, the first support plate 202 may be slidably connected to both the third support arm 2012 and the third swing arm 2013. The manner of the sliding connection can be referred to in the above embodiment and will not be described in detail here. Thus, the rotation of the third support arm 2012 and the third swing arm 2013 about the second base 206 drives the first support plate 202 to rotate about the third housing fixing bracket 2015.

[0322] Because the second support plate 203 is symmetrically arranged with the first support plate 202, when the second support plate 203 is specifically arranged, the second support plate 203 can be rotatably connected to the fourth housing fixing frame 2019. Continuing with FIG. 47 , the fourth housing fixing frame 2019 has a second rotation groove 20193. Furthermore, the second support plate 203 can be provided with a second rotating portion 2031, thereby allowing the second rotating portion 2031 to rotate along the groove surface of the second rotation groove 20193. The second support plate 203 can also be provided with a second guide portion 2032, which has a fourth track groove 20321. Furthermore, the fourth support arm 2020 and / or the fourth swing arm 2021 can be provided with a second guide structure 202103, which can be inserted into and slide along the fourth track groove 20321. Therefore, when the fourth support arm 2020 and / or the fourth swing arm 2021 rotates, the second guide structure 202103 slides in the fourth track groove 20321 , driving the second support plate 203 to rotate around the fourth shell fixing frame 2019 .

[0323] In the present application, a fifth sliding groove 20151 and a sixth sliding groove 20152 are provided on the third housing fixing frame 2015. During the process of the third housing fixing frame 2015 rotating about the second base 206, the third support arm 2012 slides in the fifth sliding groove 20151 along a first direction, and the third swing arm 2013 slides in the sixth sliding groove 20152 along a second direction, and the projection of the first cross section intersects with the projection of the second direction on the first cross section, wherein the first cross section may be a reference plane perpendicular to the rotation axis of the third support arm 2012 and the rotation axis of the third swing arm 2013. As a result, when the third support arm 2012 and the third swing arm 2013 rotate about the second base 206, their rotation axes do not overlap, thereby achieving a phase difference between the axes of the third support arm 2012 and the third swing arm 2013. Furthermore, by rationally designing the orientations of the fifth and sixth chutes 20151 and 20152, the third support arm 2012 and the third swing arm 2013 can be rotated at angles less than or equal to 90° relative to the second base 206. Based on the same principle, the fourth support arm 2020 and the fourth swing arm 2021 can be rotated at angles less than or equal to 90° relative to the second base 206.

[0324] It can be understood that in the second rotating shaft mechanism 2 provided in the present application, the rotation angle of the third swing arm 2013 and the fourth swing arm 2021 can also be adjusted by adjusting the third track groove 202021 of the first support plate 202 and the fourth track groove 20321 of the second support plate 203. For example, the maximum rotatable angle of the third swing arm 2013 can be made less than or equal to 90°. When the electronic device is in a closed state, the distance between the third swing arm 2013 and the flexible display screen 6 can be farther, thereby avoiding the third swing arm 2013 from squeezing or pulling the flexible display screen 6, thereby reducing the risk of damage to the flexible display screen 6 and extending its service life.

[0325] In addition to the above structure, in some embodiments of the present application, other possible structures may also be provided in the second rotating shaft mechanism 2. For example, reference may be made to FIG. 49, which is another partial structural schematic diagram of the second rotating shaft mechanism 2 provided in an embodiment of the present application. In this embodiment, the second rotating module 201 may further include a second synchronization component 2017. The second synchronization component 2017 may include a first driving gear 20171a disposed at the end of the third support arm 2012 and a second driving gear 20171b disposed at the end of the fourth support arm 2020, with the first driving gear 20171a and the second driving gear 20171b being meshed. In this way, when one support arm rotates around the second base 206, it can drive the other support arm to rotate synchronously around the second base 206 in opposite directions, and the two support arms rotate through the same angle.

[0326] Referring to Figure 50 , Figure 50 is a cross-sectional view taken at EE of the second rotating shaft mechanism 2 shown in Figure 49 . In the present application, the second synchronization assembly 2017 may further include a driven gear 20172, which may be disposed between the two driving gears. Furthermore, the number of driven gears 20172 may be even, with adjacent driven gears 20172 meshing with each other and with the driving gear, thereby enabling the two driving gears to rotate synchronously via the even number of driven gears 20172.

[0327] To improve the stability of the movement of the second synchronizer assembly 2017, in the present application, the two driving gears can be respectively mounted on the pins on the corresponding sides. In addition, the second synchronizer assembly 2017 can also include an intermediate shaft 20173, which can be located between the two pins, and each driven gear 20172 is mounted on an intermediate shaft 20173.

[0328] It's worth noting that, in the present application, the second synchronization assembly 2017 can be disposed on the second base 206 and accommodated within the accommodation space formed between the second cover plate 2014 and the second base 206, thereby making the structure of the second hinge mechanism 2 more compact. In the second hinge mechanism 2 provided herein, the provision of the second synchronization assembly 2017 allows one support arm to rotate about the second base 206 while simultaneously driving the other support arm to rotate about the second base 206 in opposite or opposite directions. Furthermore, because each support arm can slide along the corresponding housing fixture's sliding groove, the rotation of the support arm about the second base 206 can drive the housing fixture on the same side to rotate at the same angle, thereby achieving synchronized rotation of both housing fixtures during the synchronized rotation of the two support arms. Furthermore, because the housing fixtures can be fixedly connected to the housing of the electronic device, the synchronized rotation of the two housing fixtures can also synchronize the rotation of both housings of the electronic device. This prevents the application of instantaneous forces to the flexible display 6 secured to the two housings, thereby improving the reliability of the flexible display 6.

[0329] 50 , a damping assembly 2018 may be further provided in the second rotating module 201 of the present application. The damping assembly 2018 may include an elastic member 20181 and a conjoined cam 20182. Along the length of the second rotating module 201, the conjoined cam 20182 is located between the elastic member 20181 and the third support arm 2012. The conjoined cam 20182 abuts against the third support arm 2012 under the elastic force of the elastic member 20181.

[0330] In addition, the end of the third support arm 2012 facing the integrated cam 20182 may be provided with a first cam surface, and the end of the fourth support arm 2020 facing the integrated cam 20182 may be provided with a second cam surface. When the third support arm 2012 is provided with a first driving gear 20171a and the fourth support arm 2020 is provided with a second driving gear 20171b, the first cam surface may be provided at the end of the first driving gear 20171a, and the second cam surface may be provided at the end of the second driving gear 20171b. The end of the integrated cam 20182 facing the third support arm 2012 is provided with a third cam surface, and the end of the integrated cam 20182 facing the second support arm is provided with a fourth cam surface. Under the elastic force of the elastic member 20181, the corresponding first cam surface cooperates with the third cam surface, and the second cam surface cooperates with the fourth cam surface.

[0331] It's worth noting that, in this application, the cam surface includes multiple raised portions and recessed portions. When the inclined surfaces of the raised portions of the two cam surfaces come into contact, a damping force is generated between the two cam surfaces, hindering their continued relative rotation. Based on this, as the two support arms rotate about the second base 206, the damping assembly 2018 can provide a certain damping force for the two support arms. This damping force can be transmitted to the third housing mount 2015 via the third support arm 2012 and to the fourth housing mount 2019 via the fourth support arm 2020, thereby acting on the two housings of the electronic device through the two housing mounts. In this application, by providing the damping assembly 2018 in the second rotating module 201, the electronic device can be prevented from accidentally opening and closing, and the two housings can be kept suspended in a set position. Furthermore, the user can clearly feel the damping force when opening or closing the electronic device, which helps enhance the user experience.

[0332] When the elastic member 20181 is specifically provided, it can include a plurality of springs arranged side by side. In addition, some of the springs in the elastic member 20181 can be sleeved on the pin 2061, and other springs can be sleeved on the intermediate shaft 20173, which is conducive to improving the stability of the movement of the elastic member 20181.

[0333] Continuing with FIG. 49 , the damping assembly 2018 may further include a stopper 20183. The elastic member 20181 is positioned between the stopper 20183 and the integrated cam 20182. The stopper 20183 may also be sleeved between the pin 2061 and the intermediate shaft 20173. The stopper 20183 compresses the elastic member 20181, thereby accumulating elastic force. Furthermore, the damping assembly 2018 may further include a retaining spring 20184. The stopper 20183 is positioned between the elastic member 20181 and the retaining spring 20184. The retaining spring 20184 may be secured between the pin 2061 and the intermediate shaft 20173 to retain the elastic member 20181 and the integrated cam 20182, thereby preventing the elastic member 20181 from falling off the pin 2061 and the intermediate shaft 20173.

[0334] 49 , in the electronic device provided in the embodiment of the present application, the third shell fixing frame 2015 can be used to be fixedly connected to the second shell 4 , and the fourth shell fixing frame 2019 can be used to be fixedly connected to the third shell 5 .

[0335] In the electronic device provided herein, when the electronic device is in a flattened state, the first support plate 202, the second support plate 203, and the second cover plate 2014 of the second hinge mechanism 2 can provide a flat support for the flexible display screen 6, thereby ensuring the integrity of the electronic device in this flattened state and improving the light and shadow of the flexible display screen 6. When the second housing 4 and the third housing 5 of the electronic device rotate from the flattened state to the closed state, the second housing 4 and the third housing 5 of the electronic device can respectively drive the housing fixing brackets on the corresponding sides to rotate around the second base 206, thereby causing the housing fixing brackets to drive the support arm and the swing arm provided on the same side to rotate around the second base 206.

[0336] Thus, by rationally designing the two slide slots of each housing fixing frame, the angles of rotation of the support arms and swing arms on the corresponding sides relative to the second base 206 can be adjusted. For example, referring to FIG31 and FIG48 , when the electronic device is in the closed state, the third arc-shaped rotating block 20131 of the third swing arm 2013 is positioned farther from the flexible display screen 6. Similarly, the fourth arc-shaped rotating block 202101 of the fourth swing arm 2021 is positioned farther from the flexible display screen 6. This prevents the arc-shaped rotating blocks of the two swing arms from squeezing or pulling the flexible display screen 6, thereby reducing the risk of damage to the flexible display screen 6 and extending its service life.

[0337] It is worth mentioning that, with reference to Figure 48, in the present application, when the second hinge mechanism 2 is provided with a first support plate 202 and a second support plate 203, the flexible display screen 6 of the electronic device can be fixedly connected to the first support plate 202 and the second support plate 203, and the connection method can be, but is not limited to, bonding. In a specific implementation, the flexible display screen 6 can be bonded to a partial area of ​​the first support plate 202. For example, referring to Figure 51, Figure 51 is a structural diagram of an electronic device provided in an embodiment of the present application in which the second shell 4 and the third shell 5 are in a flattened state. In Figure 51, the flexible display screen 6 can be bonded to a portion of the first support plate 202 close to the second base 206. In addition, the flexible display screen 6 can also be bonded to a partial area of ​​the second support plate 203, for example, it can be bonded to a portion of the second support plate 203 close to the second base 206. Therefore, when the second shell 4 and the third shell 5 are in a flat state, the second shell 4, the third shell 5, the first support plate 202, the second support plate 203 and the second cover plate 2014 can jointly play a role in stably supporting the flexible display screen 6.

[0338] As the second housing 4 and the third housing 5 move from a flattened state to a closed state, the two support plates can drive the flexible display 6 to rotate, effectively preventing deformation of the flexible display 6 and reducing the risk of damage to the flexible display 6. Furthermore, referring to Figure 52, Figure 52 is a schematic diagram of the structure shown in Figure 51 in a closed state. When the second housing 4 and the third housing 5 are in the closed state, the flexible display 6 can fit snugly against the two support plates, which can help improve the light and shadow of the flexible display.

[0339] In addition, in the present application, by rationally designing the track grooves of the two support plates, when the second housing 4 and the third housing 5 are in the closed state, a space sufficient to accommodate the bent portion of the flexible display screen 6 is formed between the two support plates and the second cover plate 2014. This avoids gaps in the electronic device at the second hinge mechanism 2, thereby ensuring that the electronic device maintains a relatively complete shape when closed. This prevents foreign matter from being inserted into the electronic device through the second hinge mechanism 2, thereby preventing damage to the flexible display screen 6 and facilitating a thinner design for the overall thickness of the electronic device.

[0340] In addition, referring to Figures 28 and 48, in the present application, the hinge mechanism may further include an end cap 205, which may be disposed on the side of the second base 206 facing away from the flexible display screen 6. In one possible embodiment of the present application, the end cap 205 may be an integrally formed structure with the second base 206 to improve the structural reliability of the hinge mechanism and simplify the structure of the hinge mechanism. In other possible embodiments of the present application, the end cap 205 may also be an independently arranged structure with the second base 206, and the end cap 205 may be fixedly connected to the second base 206, and the connection method may be, but is not limited to, bonding or threaded connection. In this way, the end cap 205 may serve as an appearance part of the hinge mechanism, which may protect other structures of the hinge mechanism and help improve the appearance of the hinge mechanism, thereby improving the appearance of the electronic device as a whole.

[0341] Some possible design methods of the second hinge mechanism 2 of the electronic device provided in the embodiment of the present application are introduced in detail above. On the basis of the design principle of the second hinge mechanism 2 mentioned above, some adaptive deformations can be made to the specific structure of the second hinge mechanism 2 according to actual applications. For example, referring to Figure 53, Figure 53 is a schematic diagram of another connection relationship between the second shell 4, the third shell 5 and the second hinge mechanism 2 of the electronic device provided in the embodiment of the present application in the flattened state. In the flattened state shown in Figure 53, the first support plate 202 and the second support plate 203 of the second hinge mechanism 2 can play a role in flattening the flexible display screen 6, thereby ensuring the integrity of the shape of the electronic device in the flattened state, and can be beneficial to improving the light and shadow of the flexible display screen 6.

[0342] In addition, referring to Figure 54, Figure 54 is a schematic diagram of the structure shown in Figure 53 when it is in a closed state. When the second shell 4 and the third shell 5 are in a closed state, the flexible display screen 6 can be fitted with the two support plates, which can help improve the light and shadow of the flexible display screen. In addition, in the present application, the track grooves of the two support plates can be reasonably designed so that when the second shell 4 and the third shell 5 are in a closed state, a storage space sufficient to accommodate the bent portion of the flexible display screen 6 is formed between the two support plates and the second cover plate 2014. This can avoid the electronic device from having a gap at the second hinge mechanism 2, thereby ensuring that the shape of the electronic device is relatively complete in the closed state. In this way, foreign matter can be prevented from being inserted into the electronic device through the second hinge mechanism 2 and causing damage to the flexible display screen 6, and can help achieve a thinner design for the overall thickness of the electronic device.

[0343] It should be understood that in order to realize the form of the above-mentioned electronic device, in the present application, the design of the second rotating shaft mechanism 2 is not limited to that mentioned in the above embodiment, and any second rotating shaft mechanism 2 can be used as long as it can realize the following state, namely:

[0344] When the second and third housings 4 and 5 are in the flattened state, the support surface 2a of the second hinge mechanism, the support surface 4a of the second housing, and the support surface 5a of the third housing work together to provide a flat support for the flexible display 6. As the second and third housings 4 and 5 move from the flattened state to the closed state, they rotate toward each other, causing the flexible display 6 to bend. Furthermore, as the second and third housings 4 and 5 move from the closed state to the flattened state, they rotate away from each other, causing the flexible display 6 to unfold.

[0345] It is understood that in order for the flexible display screen 6 to achieve functions such as display and touch, it may generally include multiple layers, each of which is connected by bonding or other means, and then encapsulated into a whole by an encapsulation layer. Because the first and third shells of the electronic device can respectively drive the corresponding parts of the flexible display screen to move during rotation relative to the second shell, the bending shape of the flexible display screen is generally different when the electronic device is in different folded states. When the flexible display screen is in the bent state, due to the different bending radii of its various layers, a certain amount of displacement will occur between the various layers. The folding method and folding state of the electronic device have a significant impact on the amount of displacement of the various layers of the flexible display screen.

[0346] Next, the states of the various stacked layers of the flexible display screen 6 when the electronic device is in different folding states are analyzed.

[0347] Referring to Figure 55a, Figure 55a is another cross-sectional view taken along line AA of the electronic device shown in Figure 1. At this point, the electronic device is in a flattened state, with the first housing 3, first hinge mechanism 1, second housing 4, second hinge mechanism 2, and third housing 5 collectively forming a flat support surface for evenly supporting the flexible display 6.

[0348] In addition, referring to Figure 55b, which is a schematic diagram of the laminated structure of the flexible display screen 6 of the electronic device shown in Figure 55a, in this flattened state, the displacement between the layers of the flexible display screen 6 is zero, and the risk of failure of the flexible display screen due to layer displacement is low.

[0349] Referring to Figure 56a, Figure 56a is a cross-sectional view of the electronic device shown in Figure 3 at position FF. At this point, the electronic device is in a closed state. The portion of the flexible display 6 corresponding to the first housing 3 is located outside the folded portion of the electronic device, while the portion of the flexible display 6 corresponding to the second housing 4 and the third housing 5 is located inside the folded portion of the electronic device. As can be seen in Figure 56a, in this closed state, the first hinge mechanism 1 can reliably support one bent portion of the flexible display 6, while the second hinge mechanism 2 can accommodate the other bent portion of the flexible display 6. At this point, the bent configuration of the flexible display 6 resembles an "S" shape.

[0350] In addition, referring to Figure 56b, Figure 56b is a schematic diagram of the laminated structure of the flexible display 6 of the electronic device shown in Figure 56a. In Figure 56b, to facilitate the description of the laminated state of the flexible display 6, the flexible display 6 is divided into two parts. The first part 601 shows the displacement of the various layers of the flexible display 6 under the influence of the first shell 3 and the second shell 4, while the second part 602 shows the displacement of the various layers of the flexible display 6 under the influence of the second shell 4 and the third shell 5.

[0351] As can be seen from Figure 56b, when the electronic device is in a closed state, the dislocation trend of the stack of flexible display screen 6 under the action of the first shell 3 and the second shell 4 is consistent with the dislocation trend direction of the stack of flexible display screen 6 under the action of the second shell 4 and the third shell 5, which is conducive to the balance of the dislocation amount of the stack of flexible display screen 6, thereby reducing the risk of failure of the flexible display screen 6 due to stack dislocation.

[0352] Refer to Figure 57a, which is a cross-sectional view of the electronic device shown in Figure 4 at point GG. In this state, the flexible display 6 is completely exposed to the outside of the electronic device. However, the portion of the flexible display 6 corresponding to the first housing 3 faces away from the portions of the flexible display 6 corresponding to the second housing 4 and the third housing 5. In this state, the deformation of the flexible display 6 is primarily affected by the closed first housing 3 and second housing 4.

[0353] 57b is a schematic diagram of the stacked structure of the flexible display screen 6 of the electronic device shown in FIG57a. In this state, the stacking displacement trend of each part of the flexible display screen 6 is consistent, and the risk of failure of the flexible display screen 6 due to stacking displacement is low.

[0354] Refer to Figure 58a, which is a cross-sectional view of the electronic device shown in Figure 5 taken at position II. In this state, the portion of the flexible display 6 corresponding to the first housing 3 is exposed outside the electronic device, while the portion of the flexible display 6 corresponding to the second housing 4 and the third housing 5 is hidden inside the folded portion of the electronic device. In this state, the deformation of the flexible display 6 is primarily influenced by the closed second housing 4 and the third housing 5.

[0355] 58b is a schematic diagram of the stacked structure of the flexible display screen 6 of the electronic device shown in FIG58a. In this state, the stacking displacement trend of each part of the flexible display screen 6 is consistent, and the risk of failure of the flexible display screen 6 due to stacking displacement is low.

[0356] Referring to Figure 59a, Figure 59a is a cross-sectional view taken at JJ of the electronic device shown in Figure 6. In the state shown in Figure 59a, the first housing 3 and the second housing 4 are in a flattened state, and the third housing 5 is in an intermediate state relative to the second housing 4. In this state, the deformation of the flexible display 6 is also mainly affected by the second housing 4 and the third housing 5.

[0357] Referring to Figure 59b, which is a schematic diagram of the laminated structure of the flexible display screen 6 of the electronic device shown in Figure 59a, in this state, the laminated dislocation trend of each part of the flexible display screen 6 is consistent, and the risk of failure of the flexible display screen due to laminated dislocation is low.

[0358] From the above analysis of the shifting state of the flexible display screen 6 in different folding states of the electronic device provided in this application, it can be understood that when the electronic device is in a completely closed state, the shifting amount of the flexible display screen 6 is the largest. However, since the flexible display screen 6 is bent in an "S" shape when the electronic device is in the closed state, it is beneficial to balance the shifting amount of the stacking at various positions of the flexible display screen 6, thereby reducing the risk of failure of the flexible display screen 6 due to stacking shifting.

[0359] In some existing electronic devices, when the electronic device is in a closed state, the first and third shells are folded on the same side of the second shell, and the third shell is located between the first and second shells. This folding method can be regarded as a "G"-shaped fold. At this time, the flexible display screen also bends in a "G" shape. The laminated structure of the flexible display screen can be seen in Figure 60a. As can be seen from Figure 60a, the laminated displacement trend of the portion of the flexible display screen that is deformed by the first and second shells is opposite to the laminated displacement trend of the portion of the flexible display screen that is deformed by the second and third shells. This causes the laminated layers of the flexible display screen near the outside of the fold to be overstretched, while the laminated layers of the flexible display screen near the inside of the fold will wrinkle due to redundancy, which can easily cause the flexible display screen to be damaged due to excessive laminated displacement.

[0360] In addition, in some existing electronic devices, when the electronic device is in a closed state, its flexible display screen can also be in a bent state as shown in Figure 60b. At this time, the first shell 3 and the third shell 5 of the electronic device are also folded on the same side of the second shell 4, but the first shell 3 is located between the second shell 4 and the third shell 5. The flexible display screen also has the same problem as the flexible display screen shown in Figure 60a, which will not be repeated here.

[0361] In summary, the electronic device provided in the embodiment of the present application reasonably designs the motion trajectory of the rotating module used to realize the rotation function in the first rotating shaft mechanism and the second rotating shaft mechanism, so as to avoid squeezing or pulling the flexible display screen during the folding process of the electronic device, thereby improving the structural reliability of the flexible display screen, extending the service life of the flexible display screen, and further improving the structural reliability of the entire electronic device.

[0362] The above are merely specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed in this application are intended to be encompassed by the scope of protection of this application. Therefore, the scope of protection of this application shall be subject to the scope of protection of the claims.

Claims

1. An electronic device, characterized in that: The device comprises a first shell, a second shell, a third shell, a first rotating shaft mechanism, and a second rotating shaft mechanism, wherein the first shell and the second shell are rotatably connected via the first rotating shaft mechanism, and the second shell and the third shell are rotatably connected via the second rotating shaft mechanism, wherein: The first rotating shaft mechanism includes a first housing fixing frame, a second housing fixing frame, a main shaft and a first rotating module. The first housing fixing frame and the second housing fixing frame are respectively arranged on opposite sides of the main shaft. The first housing fixing frame is fixedly connected to the first housing, and the second housing fixing frame is fixedly connected to the second housing. The first rotating module includes a first rotating assembly and a second rotating assembly. The first rotating assembly is located between the first housing fixing frame and the second housing fixing frame, and the second rotating assembly is located between the first housing fixing frame and the second housing fixing frame. The first rotating assembly includes a first swing arm, a first support arm, and a first connecting member, wherein the first swing arm is rotatably connected to the main shaft, the first swing arm is slidably connected to the first housing fixing frame, and 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, and 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, and the first connecting member can move along the first track groove to limit the movement track of the first connecting member. The second rotating assembly includes a second swing arm, a second support arm and a second connecting piece, the second swing arm is rotatably connected to the main shaft, the second swing arm is slidably connected to the second shell fixing frame, the second support arm is rotatably connected to the first shell fixing frame, the second connecting piece is located between the second swing arm and the second support arm, the second connecting piece is rotatably connected to the second swing arm, and the second connecting piece is rotatably connected to the second support arm; the main shaft is provided with a second track groove, the second connecting piece can move along the second track groove to limit the movement track of the second connecting piece.

2. The electronic device according to claim 1, wherein The spindle includes a first base and a first cover plate, wherein the first base is provided with a first arc-shaped groove and a third arc-shaped groove; the first cover plate is provided on the first base, and the first cover plate includes a first protrusion provided toward the first arc-shaped groove and a third protrusion provided 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. When the first shell and the second shell are in a flattened 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 arc-shaped groove serves as the second trajectory groove. The second connecting member includes a third arc-shaped surface and a fourth arc-shaped surface. When the first shell and the second shell are in a flattened state and a closed state, the third arc-shaped surface abuts the surface of the third protrusion, and the fourth arc-shaped surface abuts the groove surface of the third arc-shaped groove.

3. The electronic device according to claim 2, wherein: When the first shell and the second shell are in a process of being flattened to a closed state, the first arcuate surface abuts against the surface of the first protrusion, and a gap exists between the second arcuate surface and the groove surface of the first arcuate groove; when the first shell and the second shell are in a process of being closed to a flat state, the second arcuate surface abuts against the groove surface of the first arcuate groove, and a gap exists between the first arcuate surface and the surface of the first protrusion; During the process of the first shell and the second shell changing from a flattened state to a closed state, the third curved surface abuts against the surface of the third protrusion, and a gap exists between the fourth curved surface and the groove surface of the third curved groove; during the process of the first shell and the second shell changing from a closed state to a flattened state, the fourth curved surface abuts against the groove surface of the third curved groove, and a gap exists between the third curved surface and the surface of the third protrusion.

4. The electronic device according to claim 2, wherein: The distances between the surface of the first protrusion and the groove surface of the first arc-shaped groove are equal at all locations. In the process of the first shell and the second shell moving from the flattened state to the closed state and from the closed state to the flattened 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 distances between the surface of the third protrusion and the groove surface of the third arc-shaped groove are equal at all locations. In the process of the first shell and the second shell moving from the flattened state to the closed state and from the closed state to the flattened state, the third arc-shaped surface abuts against the surface of the third protrusion, and the fourth arc-shaped surface abuts against the groove surface of the third arc-shaped groove.

5. The electronic device according to claim 2, wherein: The first arcuate surface is an arcuate surface, the second arcuate surface is an arcuate surface, and the sum of the radius of the first arcuate surface and the radius of the second arcuate surface is equal to the distance between the surface of the first protrusion and the groove surface of the first arcuate groove; The third arc surface is an arc surface, the fourth arc surface is an arc surface, and the sum of the radius of the third arc surface and the radius of the fourth arc surface is equal to the distance between the surface of the third protrusion and the groove surface of the third arc groove.

6. The electronic device according to any one of claims 1 to 5, wherein: The main shaft includes a first base, the first base is provided with a second arc-shaped groove and a fourth arc-shaped groove, the first swing arm includes a first arc-shaped rotating block, the first arc-shaped rotating block is accommodated in the second arc-shaped groove, and the first arc-shaped rotating block can slide along the groove surface of the second arc-shaped groove to achieve a rotational connection between the first swing arm and the main shaft; The second swing arm includes a second arc-shaped rotating block, which is accommodated in the fourth arc-shaped groove and can slide along the groove surface of the fourth arc-shaped groove to achieve the rotational connection between the second swing arm and the main shaft.

7. The electronic device according to claim 6, wherein: The main shaft further includes a first cover plate, the first cover plate is covered on the first base, the first cover plate includes a second protrusion disposed 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; The first cover plate further includes a fourth protrusion disposed toward the fourth arc-shaped groove, and at least a portion of the second arc-shaped rotating block is located between the fourth protrusion and the fourth arc-shaped groove.

8. The electronic device according to claim 6 or 7, wherein: The first connecting member includes a first rotating shaft and a second rotating shaft, the first connecting member and the first swing arm are rotatably connected via the first rotating shaft, and the first connecting member and the first support arm are rotatably connected via the second rotating shaft, and the axis of the first rotating shaft is parallel to the axis of the second rotating shaft but does not overlap; The second connecting member includes a third rotating shaft and a fourth rotating shaft. The second connecting member and the second swing arm are rotationally connected through the third rotating shaft. The second connecting member and the second support arm are rotationally connected through the fourth rotating shaft. The axis of the third rotating shaft is parallel to the axis of the fourth rotating shaft and does not overlap.

9. The electronic device according to claim 8, wherein The first arc-shaped rotating block is provided with a first mounting groove, the notch of the first mounting groove is arranged toward the second arc-shaped groove, the first rotating shaft is installed in the first mounting groove, a portion of the surface of the first rotating shaft contacts the groove surface of the first mounting groove, and a portion of the surface of the first rotating shaft contacts the groove surface of the second arc-shaped groove; The second arc-shaped rotating block is provided with a second mounting groove, the slot opening of the second mounting groove is arranged toward the fourth arc-shaped groove, the third rotating shaft is installed in the second mounting groove, a portion of the surface of the third rotating shaft contacts the slot surface of the second mounting groove, and a portion of the surface of the third rotating shaft contacts the slot surface of the fourth arc-shaped groove.

10. The electronic device according to claim 9, wherein The groove surface of the first installation groove includes a first arc surface, the surface of the first rotating shaft for contacting the groove surface of the first installation groove is a second arc surface, and the center of the first arc surface coincides with the center of the second arc surface; The groove surface of the second installation groove includes a fifth arc surface, the surface of the third rotating shaft for contacting the groove surface of the second installation groove is a sixth arc surface, and the center of the fifth arc surface coincides with the center of the sixth arc surface.

11. The electronic device according to claim 10, wherein: The groove surface of the second arc-shaped groove is a third arc surface, the surface of the first rotating shaft that is in contact with the groove surface of the second arc groove is a fourth arc surface, and the center of the third arc surface coincides with the center of the fourth arc surface; The groove surface of the fourth arc groove is the seventh arc surface, the surface of the third rotating shaft for contacting the groove surface of the fourth arc groove is the eighth arc surface, and the center of the seventh arc surface coincides with the center of the eighth arc surface.

12. The electronic device according to any one of claims 1 to 11, wherein: The first connecting member includes a plurality of first sub-connecting members that are rotatably connected in sequence; the plurality of first sub-connecting members are located between the first swing arm and the first support arm, the first swing arm is rotatably connected to adjacent first sub-connecting members, and the first support arm is rotatably connected to adjacent first sub-connecting members; The second connecting member includes a plurality of second sub-connecting members that are rotatably connected in sequence; the plurality of second sub-connecting members are located between the second swing arm and the second support arm, the second swing arm is rotatably connected to the adjacent second sub-connecting members, and the second support arm is rotatably connected to the adjacent second sub-connecting members.

13. The electronic device according to any one of claims 1 to 12, wherein: The first rotating shaft mechanism further includes a first synchronization assembly, the first synchronization assembly including a first gear connecting rod and a second gear connecting rod, the first gear connecting rod including a first gear and a first connecting rod, the first gear is rotatably connected to the main shaft, and the first connecting rod is slidably connected to the first housing fixing frame; The second gear connecting rod includes a second gear and a second connecting rod, the second gear is rotatably connected to the main shaft, the second connecting rod is slidably connected to the second housing fixing frame, and the first gear and the second gear are transmission-connected.

14. The electronic device according to claim 13, wherein: The first gear is rotatably connected to the main shaft via a fifth rotating shaft, and the second gear is rotatably connected to the main shaft via a sixth rotating shaft.

15. The electronic device according to claim 13 or 14, characterized in that: The first housing fixing frame is provided with a third sliding groove, the first connecting rod is installed in the third sliding groove, and can slide in the third sliding groove relative to the first housing fixing frame in a direction toward or away from the main shaft; The second housing fixing frame is provided with a fourth sliding groove, and the second connecting rod is installed in the fourth sliding groove and can slide in the fourth sliding groove relative to the second housing fixing frame in a direction toward or away from the main shaft.

16. The electronic device according to any one of claims 1 to 15, wherein: The second rotating shaft mechanism includes a second base and a second rotating module, the second rotating module includes a third rotating assembly and a fourth rotating assembly, the third rotating assembly and the fourth rotating assembly are located on opposite sides of the second base, the third rotating assembly includes a third supporting arm, a third swing arm and a third housing fixing frame; the fourth rotating assembly includes a fourth supporting arm, a fourth swing arm and a fourth housing fixing frame; The third support arm and the fourth support arm are respectively rotatably connected to the second base, and the third swing arm and the fourth swing arm are respectively rotatably connected to the second base; the rotation axis of the third support arm is parallel to but not coincident with the rotation axis of the third swing arm, and the rotation axis of the fourth support arm is parallel to but not coincident with the rotation axis of the fourth swing arm; The third housing fixing frame is fixedly connected to the second housing, and is provided with a fifth sliding groove extending along the first direction and a sixth sliding groove extending along the second direction. The third support arm can slide in the fifth sliding groove, and the third swing arm can slide in the sixth sliding groove. The projection of the first direction on the first cross section is not parallel to the projection of the second direction on the first cross section. The first cross section is a reference plane perpendicular to the rotation axis of the third support arm and the rotation axis of the third swing arm. The fourth shell fixing frame is fixedly connected to the third shell, and the fourth shell fixing frame is provided with a seventh sliding groove extending along the third direction and an eighth sliding groove extending along the fourth direction. The fourth support arm can slide in the seventh sliding groove, and the fourth swing arm can slide in the eighth sliding groove; the projection of the third direction on the second section is not parallel to the projection of the fourth direction on the second section; wherein, the second section is a reference plane perpendicular to the rotation axis of the fourth support arm and the rotation axis of the fourth swing arm.

17. The electronic device according to claim 16, wherein: The rotation angles of the third support arm and the third swing arm relative to the second base are both no greater than 90°; the rotation angles of the fourth support arm and the fourth swing arm relative to the second base are both no greater than 90°.

18. The electronic device according to claim 16 or 17, wherein: The second base is provided with a fifth arcuate groove and a sixth arcuate groove, and one end of the third swing arm for being rotatably connected to the second base is provided with a third arcuate rotating block, the third arcuate rotating block being accommodated in the fifth arcuate groove and being rotatable along the arcuate surface of the fifth arcuate groove; One end of the fourth swing arm for rotationally connecting with the second base is provided with a fourth arc-shaped rotating block. The fourth arc-shaped rotating block is accommodated in the sixth arc-shaped groove and can rotate along the arc surface of the sixth arc-shaped groove.

19. The electronic device according to any one of claims 16 to 18, wherein: The sixth slide groove is provided with a second slideway, and the third swing arm is provided with a second slider, the second slider is clamped in the second slideway, and the second slider can slide along the second slideway; The eighth sliding groove is provided with a fourth slideway, the fourth swing arm is provided with a fourth slider, the fourth slider is clamped in the fourth slideway, and the fourth slider can slide along the fourth slideway.

20. The electronic device according to claim 19, wherein The third housing fixing frame includes a first surface, the first surface being a side surface of the third housing fixing frame facing the flexible display screen of the electronic device; the second slider is a linear slider, and the second slide is a linear slide; the second slide has an opening located on the first surface, and when the second housing and the third housing are in a flat state, the second slide extends from the opening toward the second base; The fourth shell fixing frame includes a third surface, which is a side surface of the fourth shell fixing frame facing the flexible display screen of the electronic device; the fourth slider is a linear slider, and the fourth slide is a linear slide; the fourth slide has an opening located on the third surface, and when the second shell and the third shell are in a flattened state, the fourth slide extends from the opening toward the second base.

21. The electronic device according to claim 19, wherein The second slide is a curved slide; the fourth slide is a curved slide; when the second shell and the third shell are in a flattened state, the axis of the curved slide is located on the side of the curved slide away from the base.

22. The electronic device according to any one of claims 16 to 21, wherein: The second rotating module further includes a first driving link and a second driving link, the first driving link being located between the third support arm and the third swing arm; the first driving link including a first connecting portion and a second connecting portion, the first connecting portion being rotatably connected to the third support arm via a third connecting portion, and the second connecting portion being rotatably connected to the third swing arm via a fourth connecting portion; the axes of the third connecting portion and the fourth connecting portion do not overlap; The second drive link is located between the fourth support arm and the fourth swing arm, and the second drive link includes a third connecting portion and a fourth connecting portion, and the third connecting portion is rotatably connected to the fourth support arm through a fifth connecting rod, and the fourth connecting portion is rotatably connected to the fourth swing arm through a sixth connecting rod; the axes of the fifth connecting rod and the sixth connecting rod do not coincide.

23. The electronic device according to any one of claims 16 to 21, wherein: The second rotating module further includes a first driving link and a second driving link, the first driving link being located between the third support arm and the third swing arm; the first driving link including a first connecting portion and a second connecting portion, wherein the first connecting portion is slidably connected to the third swing arm via the third connecting link, and the second connecting portion is fixedly connected to the third support arm; The second driving link is located between the fourth support arm and the fourth swing arm, and the second driving link includes a third connecting portion and a fourth connecting portion, and the third connecting portion is slidingly connected to the fourth swing arm through a fifth connecting rod, and the fourth connecting portion is fixedly connected to the fourth support arm.

24. The electronic device according to claim 23, wherein: The end of the third swing arm facing the third support arm is provided with a first guide groove, and the third connecting rod is inserted into the first guide groove and can slide along the groove surface of the first guide groove; The end portion of the fourth swing arm facing the fourth support arm is provided with a second guide groove, and the fifth connecting rod is inserted into the second guide groove and can slide along the groove surface of the second guide groove.

25. The electronic device according to any one of claims 16 to 24, wherein: The second rotating shaft mechanism further includes a first support plate and a second support plate, the first support plate and the second support plate being respectively arranged on either side of the second base; the first support plate being rotatably connected to the third housing fixing frame, and the first support plate being slidably connected to the third support arm and / or the third swing arm; the second support plate being rotatably connected to the fourth housing fixing frame, and the second support plate being slidably connected to the fourth support arm and / or the fourth swing arm; When the third shell fixing frame and the fourth shell fixing frame rotate toward each other, the end of the first support plate close to the second base moves in a direction away from the second base, and the end of the second support plate close to the second base moves in a direction away from the second base.

26. The electronic device according to claim 25, wherein The third housing fixing frame is provided with a first rotation groove, the first support plate is provided with a first rotation part, the first rotation part is installed in the first rotation groove, and the first rotation part can rotate along the groove surface of the first rotation groove; The fourth housing fixing frame is provided with a second rotation groove, the second support plate is provided with a second rotation part, the second rotation part is installed in the second rotation groove, and the second rotation part can rotate along the groove surface of the second rotation groove.

27. The electronic device according to claim 25 or 26, wherein: The first support plate is provided with a first guide portion, the first guide portion having a third track groove; the third swing arm is provided with a first guide structure, the first guide structure is inserted into the third track groove and can slide along the third track groove, and / or the third support arm is provided with a first guide structure, the first guide structure is inserted into the third track groove and can slide along the third track groove; The second support plate is provided with a second guide portion, the second guide portion has a fourth track groove; the fourth swing arm is provided with a second guide structure, the second guide structure is inserted in the fourth track groove and can slide along the fourth track groove, and / or the fourth support arm is provided with a second guide structure, the second guide structure is inserted in the fourth track groove and can slide along the fourth track groove.

28. The electronic device according to any one of claims 1 to 27, wherein: The electronic device also includes a flexible display screen, which continuously covers the first shell, the first hinge mechanism, the second shell, the second hinge mechanism and the third shell, and the flexible display screen is fixedly connected to the first shell, the second shell and the third shell.

29. The electronic device according to claim 28, wherein The axis of rotation of the first swing arm around the main axis is located on the side of the main axis away from the flexible display screen; the axis of rotation of the second swing arm around the main axis is located on the side of the main axis away from the flexible display screen.

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