Rotating shaft mechanism and foldable electronic device

Abstract

A rotating shaft mechanism (100). The rotating shaft mechanism (100) comprises a base (10), a first swing arm (31), a second swing arm (41), and a first connecting member (21). The first connecting member (21) is located on one side of the base (10) in the width direction thereof, and one end of the first swing arm (31) is rotatably connected to the base (10). The other end of the first swing arm (31) is rotatably and slidably connected to the first connecting member (21). In the length direction of the base (10), the second swing arm (41) is located on one side of the first swing arm (31). One end of the second swing arm (41) is rotatably connected to the base (10), the other end of the second swing arm (41) is slidably connected to the first connecting member (21), and the second swing arm (41) is rotatably and slidably connected to the first swing arm (31). When the rotating shaft mechanism (100) rotates from an unfolded state to a folded state, with respect to the first connecting member (21), the first swing arm (31) moves in a direction opposite to the rotation direction of the first connecting member (21). The rotating shaft mechanism (100) can solve the technical problem in the prior art that when the rotating shaft mechanism (100) is in the folded state, a display screen (300) is easily damaged due to pressing. Further provided is a foldable electronic device (500).

Description

Rotating shaft mechanism and foldable electronic device

[0001] The present application claims priority to the Chinese patent application No. 202411046480.5, filed on July 31, 2024, and entitled "Rotating shaft mechanism and foldable electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic products, and in particular to a rotating shaft mechanism and a foldable electronic device. BACKGROUND

[0003] With the development of technology, the appearance (ID) form of electronic devices (such as mobile phones, tablet computers, etc.) has a trend from straight phones to foldable phones. The foldable phone has a large screen in the open state, fully meeting the visual experience of consumers, and has a small volume in the closed state, being convenient to carry. The rotating shaft mechanism in the foldable phone is mostly realized by the virtual axis rotation of the swing arm along the arc-shaped sliding groove. However, in the prior art, when the rotating shaft mechanism is rotated to the folded state, the display screen is easily squeezed, thereby causing damage to the display screen, affecting the display effect and service life of the display screen. SUMMARY

[0004] The present application provides a rotating shaft mechanism and a foldable electronic device, which can solve the technical problem that the display screen is easily squeezed when the rotating shaft mechanism is in the folded state in the prior art, thereby causing damage to the display screen.

[0005] In a first aspect, the present application provides a rotating shaft mechanism. The rotating shaft mechanism is applied to a foldable electronic device. The foldable electronic device includes a first housing, a second housing and a display screen. The rotating shaft mechanism is installed between the first housing and the second housing and is fixedly connected with the first housing and the second housing. The display screen is installed on the first housing, the second housing and the rotating shaft mechanism. When the rotating shaft mechanism rotates, the first housing and the second housing rotate relatively, thereby driving the display screen to bend or unfold.

[0006] The rotating shaft mechanism includes a base, a first rotating component and a second rotating component. The first rotating component and the second rotating component are respectively located on opposite sides of the base in the width direction and are rotationally connected with the base.

[0007] The first rotating assembly comprises a first connecting piece, a first swing arm and a second swing arm. The first connecting piece, the first swing arm and the second swing arm are located on one side of the base in the width direction. One end of the first swing arm is rotationally connected with the base, and the other end of the first swing arm is rotationally and slidingly connected with the first connecting piece. The second swing arm is located on one side of the first swing arm and is arranged along the length direction of the base. One end of the second swing arm is rotationally connected with the base, and the other end of the second swing arm is slidingly connected with the first connecting piece. The second swing arm is rotationally and slidingly connected with the first swing arm.

[0008] The first connecting piece, the first swing arm and the second swing arm can rotate relative to the base to make the rotating shaft mechanism have an unfolded state and a folded state. When the rotating shaft mechanism is in the unfolded state, the first rotating assembly and the second rotating assembly are respectively located on opposite sides of the base in the width direction and are unfolded relative to each other. Specifically, the first connecting piece, the first swing arm and the second swing arm are unfolded relative to the base. When the rotating shaft mechanism is in the folded state, the first rotating assembly and the second rotating assembly are arranged opposite to each other along the width direction of the base and are folded relative to each other. Specifically, the first connecting piece, the first swing arm and the second swing arm are folded relative to the base.

[0009] When the rotating shaft mechanism is rotated from the unfolded state to the folded state, the first swing arm moves relative to the first connecting piece in the opposite direction of the rotating direction of the first connecting piece.

[0010] In the embodiment, by rotationally and slidingly connecting the first swing arm with the first connecting piece and rotationally and slidingly connecting the first swing arm with the second swing arm, when the rotating shaft mechanism is rotated from the unfolded state to the folded state, the first swing arm rotates relative to the base and also rotates and slides relative to the first connecting piece, and the first swing arm moves relative to the first connecting piece in the opposite direction of the rotating direction of the first connecting piece, so that the rotating angle of the first swing arm relative to the base when the rotating shaft mechanism is rotated from the unfolded state to the folded state can be reduced, and the first swing arm can avoid pressing the display screen when the rotating shaft mechanism is in the folded state, the display effect of the display screen is improved, and the service life of the display screen is prolonged.

[0011] The first swing arm comprises a first rotating body, a first swing body and a first shaft body. The first rotating body, the first swing body and the first shaft body are connected in sequence. The first rotating body is used for rotationally connecting with the base, and the first shaft body is used for rotationally and slidingly connecting with the first connecting piece.

[0012] In a possible implementation, the base is provided with a first rotating groove, and a cross section of the first rotating groove is in an arc shape. A bottom surface of the first rotating body is in an arc shape. The first rotating body is installed in the first rotating groove, the bottom surface of the first rotating body faces a groove bottom wall of the first rotating groove, and the first rotating body can slide along the first rotating groove. It can be understood that the first swing arm slides along the first rotating groove, and it can also be understood that the first swing arm rotates relative to the base around an axis of the first rotating groove.

[0013] In this embodiment, the first swing arm is rotationally and slidably connected with the first connecting member and rotationally and slidably connected with the second swing arm, so that the rotation angle of the first swing arm relative to the base during rotation of the rotating shaft mechanism from the unfolded state to the folded state is reduced, and the overlap amount of the first swing arm and the base when the rotating shaft mechanism is in the folded state is increased. When the overlap amount of the first swing arm and the base when the rotating shaft mechanism is in the folded state is increased, the first swing arm is less likely to come out of the base when the rotating shaft mechanism falls or is impacted, and the support of the first swing arm to the rotating shaft mechanism is improved, so that the deformation and movement of the base towards the rotating shaft mechanism when the rotating shaft mechanism falls or is impacted are reduced, and the anti-falling performance of the rotating shaft mechanism is improved. At the same time, when the overlap amount of the first swing arm and the base when the rotating shaft mechanism is in the folded state is increased, the stability of the rotating shaft mechanism during opening and closing is improved, and the rotating shaft mechanism is less likely to bend and jam during opening and closing, the smoothness of the opening and closing process of the rotating shaft mechanism is improved, and the user experience is improved.

[0014] In a possible implementation, the first swing arm further includes a first sliding rail, and the first sliding rail is arranged on a side of the first swing arm facing the second swing arm. Specifically, the first sliding rail is connected to a side of the first swing body facing the second swing arm. The second swing arm includes a first sliding column and a second sliding column, and the first sliding column and the second sliding column are arranged in a spaced manner. The first sliding column and the second sliding column clamp the first sliding rail, and the first sliding column and the second sliding column can slide and rotate relative to the first swing arm along the first sliding rail.

[0015] In a possible implementation, the first swing arm further includes a first sliding rail, and the first sliding rail is arranged on a side of the first swing arm facing the second swing arm. Specifically, the first sliding rail is connected to a side of the first swing body facing the second swing arm. The second swing arm includes a first sliding column and a second sliding column, and the first sliding column and the second sliding column are arranged in a spaced manner. The first sliding column and the second sliding column clamp the first sliding rail, and the first sliding column and the second sliding column can slide and rotate relative to the first swing arm along the first sliding rail.

[0016] In the embodiment, the first swing arm and the second swing arm are rotatably and slidably connected by arranging the first slide rail on the first swing arm and arranging the first slide post and the second slide post on the second swing arm, so that the rotation stability of the first swing arm and the second swing arm can be improved, and the rotation stability of the rotating shaft mechanism can be improved. In the embodiment, the first slide post and the second slide post are clamped on the first slide rail, so that the stability of the first slide post and the second slide post sliding along the first slide rail can be improved, the first slide post and the second slide post can be prevented from being separated from the first slide rail, and the first slide post and the second slide post can be prevented from deviating from the predetermined movement track, so that the rotation stability of the rotating shaft mechanism can be improved.

[0017] In a possible implementation, the first slide rail includes a first end and a second end. The first end and the second end are oppositely arranged along the extension direction of the first slide rail. The first end and the second end are arranged in a staggered manner along the thickness direction and the length direction of the first swing arm, and the second end is located on the side of the first end close to the base.

[0018] When the rotating shaft mechanism is rotated from the unfolded state to the folded state, the first slide post and the second slide post slide along the first slide rail from the first end to the second end. It can be understood that when the rotating shaft mechanism is rotated from the unfolded state to the folded state, the first swing arm is rotated relative to the second swing arm towards the inner side of the rotating shaft mechanism.

[0019] In a possible implementation, the cross section of the first slide rail is arc-shaped. The first slide rail includes a first segment and a second segment connected in sequence. The first end is located at one end of the first segment away from the second segment, and the second end is located at one end of the second segment away from the first segment. The radius of curvature of the first segment is greater than the radius of curvature of the second segment. That is, the bending degree of the first segment is less than the bending degree of the second segment. When the rotating shaft mechanism is in the unfolded state, the first slide post and the second slide post are located on the first segment. When the rotating shaft mechanism is in the folded state, the first slide post and the second slide post are located on the second segment.

[0020] In the embodiment, the radius of curvature of the first segment of the first slide rail is set to be less than the radius of curvature of the second segment, so that the sliding speed of the first slide post and the second slide post along the first segment is less than the sliding speed along the second segment, thereby reducing the initial rotation speed of the rotating shaft mechanism when rotating from the unfolded state to the folded state, avoiding pulling the display screen, avoiding damage or reverse arching of the display screen, and avoiding jamming of the rotating shaft mechanism during rotation, thereby improving the smoothness of the rotating shaft mechanism during rotation.

[0021] In a possible implementation, the second section is provided with a first stop surface, and the first stop surface faces the base. The second slide column is located on the side of the first slide column close to the base, and the second slide column is provided with a second stop surface, and the second stop surface is located on the side of the second slide column away from the base. When the hinge mechanism is in the folded state, the second stop surface and the first stop surface are oppositely and spacedly arranged along the thickness direction of the base.

[0022] In this embodiment, the first stop surface plays a stop role on the second stop surface. That is, the first slide rail plays a stop role on the second slide column. That is, the first swing arm plays a supporting and stopping role on the second swing arm. In this way, when the hinge mechanism is impacted or falls, the second swing arm can be prevented from sliding towards the direction away from the base along the first slide groove, so that the display screen can be prevented from being squeezed, and the drop resistance of the foldable electronic device and the service life of the display screen can be improved.

[0023] In a possible implementation, when the hinge mechanism is in the folded state, the distance between the second stop surface and the first stop surface is 0.1 mm to 0.5 mm. That is, the second slide column and the first slide rail have a small gap, so that when the hinge mechanism rotates to the folding process, the second slide column can be smoothly slid from the second section to the first section, and the smoothness of the hinge mechanism in the rotating process can be improved.

[0024] In a possible implementation, the second stop surface is a plane, and the second slide column further includes a first arc surface connected with the second stop surface. When the first swing arm and the second swing arm rotate relative to the base, the first arc surface slides along the first slide rail.

[0025] When the hinge mechanism falls or is impacted from the side of the base in the folded state, the second swing arm slides towards the direction away from the base, the second stop surface moves towards the first stop surface, and the second stop surface forms a surface-to-surface contact with the first stop surface, so that the stopping effect of the first swing arm on the second swing arm can be improved, and the drop resistance of the foldable electronic device can be further improved.

[0026] In a possible implementation, the first swing arm is provided with a first slide groove. The first slide groove is a strip-shaped groove. The second swing arm includes a first slide shaft, and the first slide shaft is arranged in the first slide groove and can slide and rotate relative to the first swing arm along the first slide groove.

[0027] In the embodiment, the first swing arm and the second swing arm are rotatably and slidably connected by arranging the first sliding groove on the first swing arm and the first sliding shaft on the second swing arm, and the first sliding shaft is limited in the first sliding groove, so that the stability of the first sliding shaft sliding along the first sliding groove is improved, and the stability of the rotation of the swing shaft mechanism is improved.

[0028] In a possible implementation, the first connecting piece is provided with a second sliding groove. The first swing arm comprises a first shaft body arranged at an end of the first swing arm away from the base. The first shaft body is arranged in the second sliding groove and can slide and rotate relative to the first connecting piece along the second sliding groove.

[0029] In the embodiment, the first shaft body is limited in the second sliding groove, so that the connection stability of the first shaft body and the first connecting piece is improved, and the stability of the rotation of the swing shaft mechanism is improved.

[0030] In a possible implementation, the second sliding groove comprises a first position and a second position. The first position and the second position are respectively located at opposite ends of the extension direction of the second sliding groove and are arranged in the thickness direction of the first connecting piece.

[0031] When the swing shaft mechanism is in the unfolded state, the first connecting piece and the first swing arm are unfolded relative to the base, and the first shaft body is located at the first position. When the swing shaft mechanism is in the folded state, the first connecting piece and the first swing arm are folded relative to the base, the first shaft body is located at the second position, and the second position is located on the side of the first position away from the center of the base.

[0032] In the embodiment, by arranging the first shaft body in the second sliding groove, during the rotation of the swing shaft mechanism from the unfolded state to the folded state, the first shaft body can slide from the first position to the second position along the second sliding groove, that is, the first shaft body can move relative to the first connecting piece towards the outside of the swing shaft mechanism, so that the rotation angle of the first swing arm relative to the base during the rotation of the swing shaft mechanism from the unfolded state to the folded state is reduced, and the extrusion of the first swing arm on the display screen is reduced or even avoided, and meanwhile, the overlap amount of the first swing arm and the base when the swing shaft mechanism is in the folded state is increased, and the connection stability between the first swing arm and the base is improved.

[0033] In a possible implementation, the second sliding groove has an arc structure, and the center of the second sliding groove is located on the side of the second sliding groove away from the base. In other implementations, the second sliding groove has an arc structure, and the center of the second sliding groove is located on the side of the second sliding groove towards the base. Alternatively, the second sliding groove can have a straight line structure.

[0034] In a possible implementation, when the rotating shaft mechanism is in the folded state, a tangent line of the second sliding groove in the second position is parallel to the width direction of the base. When the rotating shaft mechanism is in the folded state, the force direction of the inner wall of the second sliding groove on the first shaft body is parallel or substantially parallel to the thickness direction of the base, so that the first shaft body can be prevented from sliding towards the first position when the rotating shaft mechanism falls or is impacted, and the anti-falling performance of the rotating shaft mechanism and the foldable electronic device can be improved.

[0035] In a possible implementation, the second sliding groove, the first swing arm and the second swing arm are provided in plurality, and the first swing arm is provided in one-to-one correspondence with the second sliding groove, and the first shaft body of each first swing arm is mounted in the corresponding second sliding groove. The second swing arm is provided in one-to-one correspondence with the first swing arm, and each second swing arm is rotationally and slidingly connected with the corresponding first swing arm. The two second sliding grooves are at least partially misaligned in the thickness direction of the first connecting member.

[0036] The rotating shaft mechanism provided in the embodiment can adjust the positions or shapes of the second sliding groove and the first shaft body as needed, and adjust the positions or shapes of the corresponding first sliding rail, first sliding column and second sliding column, so that the rotating shaft mechanism can rotate smoothly, and the required avoiding space can be formed in the first connecting member to adapt to different space requirements, and the rotating shaft mechanism has higher design flexibility and can adapt to different application scenarios.

[0037] In a possible implementation, when the rotating shaft mechanism rotates from the unfolded state to the folded state, the rotation angle of the first swing arm relative to the base is 90°-100°. The rotating shaft mechanism provided in the embodiment can reduce the rotation angle of the first swing arm relative to the base when the rotating shaft mechanism rotates from the unfolded state to the folded state, so that the extrusion of the first swing arm on the display screen can be reduced or even avoided, and meanwhile, the overlapping amount of the first swing arm on the base when the rotating shaft mechanism is in the folded state can be increased, and the connection stability between the first swing arm and the base can be improved.

[0038] The second rotating assembly includes a second connecting member, a third swing arm and a fourth swing arm. The second connecting member and the first connecting member are respectively located on opposite sides of the base in the width direction. One end of the third swing arm is rotationally connected with the base, and the other end of the third swing arm is rotationally and slidingly connected with the second connecting member. The fourth swing arm is located on one side of the third swing arm in the length direction of the base. One end of the fourth swing arm is rotationally connected with the base, and the other end of the fourth swing arm is slidingly connected with the second connecting member, and the fourth swing arm is rotationally and slidingly connected with the third swing arm.

[0039] When the rotating shaft mechanism is in the unfolded state, the second connecting piece, the third swing arm and the fourth swing arm are unfolded relative to the base. When the rotating shaft mechanism is in the folded state, the second connecting piece, the third swing arm and the fourth swing arm are folded relative to the base. When the rotating shaft mechanism rotates from the unfolded state to the folded state, the third swing arm moves relative to the second connecting piece in a direction opposite to a rotating direction of the second connecting piece.

[0040] In the embodiment, the third swing arm is rotatably and slidably connected with the second connecting piece and the fourth swing arm, so that when the rotating shaft mechanism rotates from the unfolded state to the folded state, the third swing arm rotates relative to the base and rotates and slides relative to the second connecting piece, and the third swing arm moves relative to the second connecting piece in a direction opposite to a rotating direction of the second connecting piece, thereby reducing the rotating angle of the third swing arm relative to the base when the rotating shaft mechanism rotates from the unfolded state to the folded state, avoiding the third swing arm pressing the display screen when the rotating shaft mechanism is in the folded state, improving the display effect of the display screen, and prolonging the service life of the display screen.

[0041] The third swing arm has the same or similar structure as the first swing arm. The third swing arm comprises a second rotating body, a second swing body and a second shaft body. The second rotating body, the second swing body and the second shaft body are connected in sequence. The second rotating body is configured to be rotatably connected with the base, and the second shaft body is configured to be rotatably and slidably connected with the second connecting piece.

[0042] In a possible implementation, the base is provided with a second rotating groove, and a cross section of the second rotating groove is arc-shaped. The second rotating groove is arranged in a spaced manner with the first rotating groove. For example, the second rotating groove and the first rotating groove are arranged in a spaced manner along a width direction of the base.

[0043] The bottom surface of the second rotating body is arc-shaped. The second rotating body is installed in the second rotating groove, and the bottom surface of the second rotating body faces a groove bottom wall of the second rotating groove. In addition, the second rotating body can slide along the second rotating groove. It can be understood that the third swing arm slides along the second rotating groove, and it can also be understood that the third swing arm rotates relative to the base around an axis of the second rotating groove.

[0044] In the embodiment, the second rotating groove is arranged on the base, and the second rotating body slides along the second rotating groove, so that the third swing arm is rotatably connected to the base. In the embodiment, the third swing arm is rotatably and slidably connected to the second connecting piece and the fourth swing arm, so that the rotation angle of the third swing arm relative to the base during the rotation of the rotating shaft mechanism from the unfolded state to the folded state is reduced, and the overlap amount of the third swing arm and the base when the rotating shaft mechanism is in the folded state is increased. When the overlap amount of the third swing arm and the base when the rotating shaft mechanism is in the folded state is increased, the third swing arm is less likely to come out of the base when the rotating shaft mechanism falls or is impacted, and the support of the third swing arm to the rotating shaft mechanism is improved, so that the deformation and movement of the base towards the rotating shaft mechanism when the rotating shaft mechanism falls or is impacted are reduced, and the anti-falling performance of the rotating shaft mechanism is improved. Meanwhile, when the overlap amount of the third swing arm and the base when the rotating shaft mechanism is in the folded state is increased, the stability of the rotating shaft mechanism during the opening and closing process is improved, and the bending and jamming of the rotating shaft mechanism during the opening and closing process are reduced or even avoided, the smoothness of the opening and closing process of the rotating shaft mechanism is improved, and the user experience is improved.

[0045] In a possible implementation, the third swing arm further includes a second sliding rail, and the second sliding rail is arranged on a side of the third swing arm facing the fourth swing arm. Specifically, the second sliding rail is connected to a side of the second rotating body facing the fourth swing arm. The fourth swing arm includes a third sliding column and a fourth sliding column, and the third sliding column and the fourth sliding column are arranged in a spaced manner. The third sliding column and the fourth sliding column clamp the second sliding rail, and the third sliding column and the fourth sliding column can slide and rotate relative to the third swing arm along the second sliding rail.

[0046] In the embodiment, the second sliding rail is arranged on the third swing arm, and the third sliding column and the fourth sliding column are arranged on the fourth swing arm, so that the third swing arm is rotatably and slidably connected to the fourth swing arm, and the rotation stability of the third swing arm and the fourth swing arm is improved, and the rotation stability of the rotating shaft mechanism is further improved. In the embodiment, the third sliding column and the fourth sliding column clamp the second sliding rail, so that the stability of the third sliding column and the fourth sliding column sliding along the second sliding rail is improved, the third sliding column and the fourth sliding column are prevented from being separated from the second sliding rail, and the third sliding column and the fourth sliding column are prevented from deviating from the intended movement track, and the rotation stability of the rotating shaft mechanism is further improved.

[0047] In a possible implementation, the second sliding rail includes a third end and a fourth end. The third end and the fourth end are arranged in a relative manner along the extension direction of the second sliding rail. The third end and the fourth end are arranged in a staggered manner along the thickness direction and the length direction of the third swing arm, and the fourth end is located on a side of the third end close to the base.

[0048] When the hinge mechanism rotates from the unfolded state to the folded state, the third slide post and the fourth slide post slide along the second slide rail from the third end to the fourth end. It can be understood that when the hinge mechanism rotates from the unfolded state to the folded state, the third swing arm rotates relative to the fourth swing arm towards the inner side of the hinge mechanism.

[0049] In a possible implementation, the second slide rail has an arc-shaped cross section. The second slide rail comprises a third segment and a fourth segment connected in sequence. The third end is located at one end of the third segment away from the fourth segment, and the fourth end is located at one end of the fourth segment away from the third segment. The third segment has a larger curvature radius than the fourth segment. That is, the third segment has a smaller bending degree than the fourth segment. When the hinge mechanism is in the unfolded state, the third slide post and the fourth slide post are located on the third segment. When the hinge mechanism is in the folded state, the third slide post and the fourth slide post are located on the fourth segment.

[0050] In this embodiment, by setting the curvature radius of the third segment of the second slide rail to be smaller than the curvature radius of the fourth segment, the sliding speed of the third slide post and the fourth slide post along the third segment is smaller than the sliding speed along the fourth segment, so that the rotating speed of the hinge mechanism in the initial stage of rotating from the unfolded state to the folded state can be reduced, and in turn, the display screen can be prevented from being pulled, the display screen can be prevented from being damaged or inverted, and meanwhile, the hinge mechanism can be prevented from being stuck during rotation, and the smoothness of the hinge mechanism during rotation can be improved.

[0051] In a possible implementation, the fourth segment is provided with a third stop surface facing the base. The fourth slide post is located on the side of the third slide post close to the base, and the fourth slide post is provided with a fourth stop surface located on the side of the fourth slide post away from the base. When the hinge mechanism is in the folded state, the fourth stop surface and the third stop surface are oppositely and spacedly arranged along the thickness direction of the base.

[0052] In this embodiment, the third stop surface plays a stop role on the fourth stop surface. That is, the second slide rail plays a stop role on the fourth slide post. That is, the third swing arm plays a supporting and stopping role on the fourth swing arm. In this way, when the hinge mechanism is impacted or falls, the fourth swing arm can be prevented from sliding towards the direction away from the base along the second slide groove, so that the display screen can be prevented from being squeezed, and in turn, the drop resistance of the foldable electronic device can be improved, and the service life of the display screen can be improved.

[0053] In a possible implementation, the distance between the fourth stop surface and the third stop surface is 0.1mm to 0.5mm when the rotating shaft mechanism is in the folded state. That is, there is a small gap between the fourth slide column and the second slide rail, so that the fourth slide column can smoothly slide from the fourth section to the third section when the rotating shaft mechanism rotates to the folding process, thereby improving the smoothness of the rotating shaft mechanism in the rotating process.

[0054] In a possible implementation, the fourth stop surface is a plane, and the fourth slide column further includes a second arc surface connected with the fourth stop surface. When the third swing arm and the fourth swing arm rotate relative to the base, the second arc surface slides along the second slide rail.

[0055] When the rotating shaft mechanism falls or is impacted from the side of the base in the folded state, the fourth swing arm slides towards the direction away from the base, the fourth stop surface moves towards the third stop surface, and forms a surface-to-surface contact with the third stop surface, thereby improving the stop effect of the third swing arm on the fourth swing arm, and further improving the drop resistance of the foldable electronic device.

[0056] In a possible implementation, the third swing arm includes a third sliding groove, and the third sliding groove is a strip-shaped groove. The fourth swing arm includes a second slide shaft, and the second slide shaft is arranged in the third sliding groove and can slide and rotate relative to the third swing arm along the third sliding groove.

[0057] In this embodiment, by arranging the third sliding groove in the third swing arm and the second slide shaft in the fourth swing arm, the rotating and sliding connection of the third swing arm and the fourth swing arm is realized, and the second slide shaft is limited in the third sliding groove, thereby improving the stability of the second slide shaft in sliding along the third sliding groove, improving the rotating stability of the third swing arm and the fourth swing arm, and further improving the rotating stability of the rotating shaft mechanism.

[0058] In a possible implementation, the second connecting piece is provided with a fourth sliding groove. The third swing arm includes a second shaft body, and the first shaft body is arranged at one end of the third swing arm away from the base, and the second shaft body is mounted in the fourth sliding groove and can slide and rotate relative to the second connecting piece along the fourth sliding groove. In this embodiment, by limiting the second shaft body in the fourth sliding groove, the connection stability of the second shaft body and the second connecting piece is improved, thereby improving the rotating stability of the rotating shaft mechanism.

[0059] In a possible implementation, the fourth sliding groove includes a third position and a fourth position. The third position and the fourth position are respectively located at opposite ends of the extension direction of the fourth sliding groove and are arranged in the thickness direction of the second connecting piece.

[0060] When the rotating shaft mechanism is in the unfolded state, the second connecting piece and the third swing arm are unfolded relative to the base, and the first shaft body is located at the third position. When the rotating shaft mechanism is in the folded state, the second connecting piece and the third swing arm are folded relative to the base, the first shaft body is located at the fourth position, and the fourth position is located on the side of the third position away from the center of the base.

[0061] In the embodiment, by arranging the first shaft body in the fourth sliding groove, the first shaft body can slide along the fourth sliding groove from the third position to the fourth position during the rotating shaft mechanism rotates from the unfolded state to the folded state, that is, the second shaft body can move relative to the second connecting piece towards the outside of the rotating shaft mechanism, so that the rotating angle of the third swing arm relative to the base during the rotating shaft mechanism rotates from the unfolded state to the folded state can be reduced, and the extrusion of the third swing arm on the display screen can be reduced or even avoided, and meanwhile, the overlapping amount of the third swing arm and the base when the rotating shaft mechanism is in the folded state can be increased, and the connection stability between the third swing arm and the base can be improved.

[0062] In a possible implementation, the fourth sliding groove is in an arc structure, and the center of the fourth sliding groove is located on the side of the fourth sliding groove away from the base. In the embodiment, by arranging the fourth sliding groove in an arc structure, the movement track of the third swing arm relative to the second connecting piece can be better adapted, so that the rotating smoothness of the rotating shaft mechanism can be improved. In other implementations, the fourth sliding groove is in an arc structure, and the center of the fourth sliding groove is located on the side of the fourth sliding groove towards the base. Alternatively, the fourth sliding groove can also be in a straight line structure.

[0063] In a possible implementation, when the rotating shaft mechanism is in the folded state, the tangent line of the fourth sliding groove at the fourth position is parallel to the width direction of the base. When the rotating shaft mechanism is in the folded state, the direction of the acting force of the inner wall of the fourth sliding groove on the first shaft body is parallel or substantially parallel to the thickness direction of the base, so that the first shaft body can be prevented from sliding towards the third position when the rotating shaft mechanism falls or is impacted, and the anti-falling performance of the rotating shaft mechanism and the foldable electronic device can be improved.

[0064] In a possible implementation, when the rotating shaft mechanism rotates from the unfolded state to the folded state, the rotating angle of the third swing arm relative to the base is 90°-100°. The rotating shaft mechanism provided in the embodiment can reduce the rotating angle of the third swing arm relative to the base when the rotating shaft mechanism rotates from the unfolded state to the folded state, so that the extrusion of the third swing arm on the display screen can be reduced or even avoided, and meanwhile, the overlapping amount of the third swing arm and the base when the rotating shaft mechanism is in the folded state can be increased, and the connection stability between the third swing arm and the base can be improved.

[0065] In a possible implementation, the rotating shaft mechanism further includes a first support and a second support. The first support is arranged in a stack with the first connecting piece, and the first support is rotationally connected with the first connecting piece and rotationally and slidably connected with the second swing arm. The second support is arranged in a stack with the second connecting piece, and the second support is rotationally connected with the second connecting piece and rotationally and slidably connected with the fourth swing arm.

[0066] When the rotating shaft mechanism is in the folded state, the first support and the second support are arranged oppositely, and the distance between the first support and the second support gradually increases in the direction close to the base, thereby forming a water-drop-shaped accommodating space between the first support, the second support, and the base. The bendable part of the display screen is located in the accommodating space, so as to avoid extrusion on the display screen.

[0067] When the rotating shaft mechanism is in the unfolded state, the first support and the second support are respectively located on opposite sides of the width direction of the base, and the top surface of the first support is flush with the top surface of the second support. The display screen is arranged on the same side of the first support, the second support, and the base. The first support, the second support, and the base jointly support the display screen. In this embodiment, when the rotating shaft mechanism is in the unfolded state, the top surface of the first door plate is flush with the top surface of the second door plate, so as to improve the support performance on the display screen and improve the flatness of the display screen when the foldable electronic device is in the unfolded state.

[0068] In a second aspect, the present application provides a foldable electronic device. The foldable electronic device includes a first shell, a second shell, a display screen, and the rotating shaft mechanism. The rotating shaft mechanism is connected between the first shell and the second shell, and the display screen is mounted on the first shell, the second shell, and the rotating shaft mechanism. When the rotating shaft mechanism rotates, the first shell and the second shell rotate relatively, thereby driving the display screen to bend or unfold.

[0069] In summary, the rotating shaft mechanism provided by the present application rotationally and slidably connects the first swing arm with the first connecting piece and the second swing arm, so that when the rotating shaft mechanism rotates from the unfolded state to the folded state, the first swing arm rotates relative to the base while also rotating and sliding relative to the first connecting piece, and the first swing arm moves relative to the first connecting piece in the opposite direction of the rotation direction of the first connecting piece. Therefore, the rotation angle of the first swing arm relative to the base when the rotating shaft mechanism rotates from the unfolded state to the folded state can be reduced, thereby avoiding extrusion of the first swing arm on the display screen when the rotating shaft mechanism is in the folded state, improving the display effect of the display screen, and prolonging the service life of the display screen. BRIEF DESCRIPTION OF DRAWINGS

[0070] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the accompanying drawings needed to be used in the embodiments of the present application or the background art will be described in brief.

[0071] Fig. 1 is a structural schematic diagram of a foldable electronic device in a first state according to an embodiment of the present application;

[0072] Fig. 2 is a structural schematic diagram of the foldable electronic device in a second state according to an embodiment of the present application;

[0073] Fig. 3 is a structural schematic diagram of the foldable electronic device in a third state according to an embodiment of the present application;

[0074] Fig. 4 is an exploded structural schematic diagram of the foldable electronic device shown in Fig. 3;

[0075] Fig. 5 is a structural schematic diagram of a rotating shaft mechanism in the foldable electronic device shown in Fig. 4;

[0076] Fig. 6 is an exploded structural schematic diagram of the rotating shaft mechanism shown in Fig. 5;

[0077] Fig. 7 is a partial structural schematic diagram of the rotating shaft mechanism shown in Fig. 5;

[0078] Fig. 8 is a partial exploded structural schematic diagram of the rotating shaft mechanism shown in Fig. 6;

[0079] Fig. 9 is a structural schematic diagram of a first connecting member and a second connecting member in the rotating shaft mechanism shown in Fig. 6;

[0080] Fig. 10 is a structural schematic diagram of the first connecting member and the second connecting member shown in Fig. 9 from another angle;

[0081] Fig. 11 is a cross-sectional structural schematic diagram of the first connecting member and the second connecting member shown in Fig. 9 along the direction of A-A;

[0082] Fig. 12 is a structural schematic diagram of a first swing arm and a third swing arm in the rotating shaft mechanism shown in Fig. 6;

[0083] Fig. 13 is a structural schematic diagram of the first swing arm and the third swing arm shown in Fig. 10 from another angle;

[0084] Fig. 14 is a cross-sectional structural schematic diagram of the rotating shaft mechanism shown in Fig. 7 along the direction of B-B;

[0085] Fig. 15 is a structural schematic diagram of a second swing arm and a fourth swing arm in the rotating shaft mechanism shown in Fig. 6;

[0086] Fig. 16 is a cross-sectional structural schematic diagram of the rotating shaft mechanism shown in Fig. 7 along the direction of C-C;

[0087] Fig. 17 is a cross-sectional structural schematic diagram of the rotating shaft mechanism shown in Fig. 14 in a folded state;

[0088] Fig. 18 is a sectional view of the hinge mechanism shown in Fig. 16 in a folded state;

[0089] Fig. 19 is a partially simplified view of the hinge mechanism shown in Fig. 7;

[0090] Fig. 20 is a sectional view of a hinge mechanism according to another embodiment of the present application;

[0091] Fig. 21 is a view of the first and second support members of the hinge mechanism shown in Fig. 6;

[0092] Fig. 22 is a partially view of the hinge mechanism shown in Fig. 5;

[0093] Fig. 23 is a partially view of the hinge mechanism shown in Fig. 5;

[0094] Fig. 24 is a partially view of the hinge mechanism shown in Fig. 22 in a folded state;

[0095] Fig. 25 is a partially view of the hinge mechanism shown in Fig. 23 in a folded state;

[0096] Fig. 26 is a partially view of a hinge mechanism according to a second embodiment of the present application;

[0097] Fig. 27 is a sectional view of the hinge mechanism shown in Fig. 26 along the direction D-D;

[0098] Fig. 28 is an enlarged view of the first swing arm of the hinge mechanism shown in Fig. 26;

[0099] Fig. 29 is a sectional view of the hinge mechanism shown in Fig. 27 in a folded state;

[0100] Fig. 30 is a sectional view of a hinge mechanism according to a third embodiment of the present application;

[0101] Fig. 31 is an enlarged view of the first swing arm of the hinge mechanism shown in Fig. 30;

[0102] Fig. 32 is an enlarged view of the second swing arm of the hinge mechanism shown in Fig. 30;

[0103] Fig. 33 is a sectional view of the hinge mechanism shown in Fig. 30 in a folded state;

[0104] Fig. 34 is a partially exploded view of the hinge mechanism according to the third embodiment of the present application;

[0105] Fig. 35 is an exploded view of a hinge mechanism according to a fourth embodiment of the present application;

[0106] Fig. 36 is a sectional view of the hinge mechanism according to the fourth embodiment of the present application;

[0107] FIG. 37 is a schematic view of a cross-sectional structure of a hinge mechanism according to a fourth embodiment of the present application at another position;

[0108] FIG. 38 is a schematic view of a cross-sectional structure of a hinge mechanism according to a fifth embodiment of the present application. DETAILED DESCRIPTION

[0109] The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0110] Please refer to FIG. 1 to FIG. 3. FIG. 1 is a schematic view of a structure of a foldable electronic device 500 in a first state according to an embodiment of the present application. FIG. 2 is a schematic view of a structure of the foldable electronic device 500 in a second state according to an embodiment of the present application. FIG. 3 is a schematic view of a structure of the foldable electronic device 500 in a third state according to an embodiment of the present application.

[0111] For the convenience of description, the width direction of the foldable electronic device 500 is defined as the X direction, the length direction of the foldable electronic device 500 is defined as the Y direction, and the thickness direction of the foldable electronic device 500 is defined as the Z direction. The X direction, the Y direction and the Z direction are perpendicular to each other.

[0112] The foldable electronic device 500 includes, but is not limited to, a cellphone, a notebook computer, a tablet personal computer, a laptop computer, a personal digital assistant, a wearable device, a mobile device or a vehicle-mounted device. In the embodiments of the present application, the foldable electronic device 500 is taken as an example of a cellphone.

[0113] The foldable electronic device 500 shown in FIG. 1 is in a folded state. The foldable electronic device 500 shown in FIG. 2 is in a half-opened state. The foldable electronic device 500 shown in FIG. 3 is in an opened state. The opening angle α of the foldable electronic device 500 shown in FIG. 2 is 90 degrees. The opening angle β of the foldable electronic device 500 shown in FIG. 3 is 180 degrees.

[0114] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have a little deviation. For example, the unfolded angle a of the foldable electronic device 500 shown in FIG. 2 is 90 degrees, which means that a can be 90 degrees, or approximately 90 degrees, such as 80 degrees, 85 degrees, 95 degrees or 0 degrees, etc. The unfolded angle β of the foldable electronic device 500 shown in FIG. 3 is 180 degrees, which means that β can be 180 degrees, or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees and 190 degrees, etc. The angles illustrated in the following embodiments can be understood in the same way.

[0115] The foldable electronic device 500 illustrated in the embodiments of the present application is an electronic device that can be folded once. In some other embodiments, the foldable electronic device 500 can also be an electronic device that can be folded multiple times (more than twice). At this time, the foldable electronic device 500 can include multiple parts, and adjacent two parts can be relatively close to be folded to the foldable electronic device 500 in a folded state, and adjacent two parts can be relatively far away to be unfolded to the foldable electronic device 500 in an unfolded state.

[0116] Please refer to FIG. 4, which is an exploded structural schematic diagram of the foldable electronic device 500 shown in FIG. 3.

[0117] The foldable electronic device 500 comprises the folding device 200 and the display screen 300, and the display screen 300 is installed on the folding device 200. The display screen 300 comprises a display surface 310 and a mounting surface 320, and the display surface 310 and the mounting surface 320 are oppositely arranged. The display surface 310 is used for displaying text, images, videos and the like. The display screen 300 comprises a first part 330, a second part 340 and a bendable part 350. The bendable part 350 is located between the first part 330 and the second part 340, and the bendable part 350 can bend around a direction with the Y direction as an axis. The first part 330, the second part 340 and the bendable part 350 jointly constitute the display screen 300. In the embodiment, the display screen 300 adopts a flexible display screen, for example, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen or a quantum dot light emitting diode (QLED) display screen.

[0118] The folding device 200 comprises a first housing 210, a second housing 220 and a hinge mechanism 100. The hinge mechanism 100 is located between the first housing 210 and the second housing 220, and is fixedly connected with the first housing 210 and the second housing 220 to realize the rotational connection between the first housing 210 and the second housing 220. The display screen 300 is installed on the folding device 200, and the mounting surface 320 is fixedly connected with the folding device 200. Specifically, the first housing 210 bears the first part 330 of the display screen 300, and the second housing 220 bears the second part 340. In other words, the first part 330 is installed on the first housing 210, and the second part 340 is installed on the second housing 220. The hinge mechanism 100 is oppositely arranged with the bendable part 350. The first housing 210 and the second housing 220 can be relatively rotated through the hinge mechanism 100, so that the folding device 200 can be switched between the folded state and the unfolded state.

[0119] In combination with FIG. 1, the first shell 210 and the second shell 220 are relatively rotated through the rotating shaft mechanism 100, the display screen 300 is folded by relatively approaching the first shell 210 and the second shell 220, and the foldable electronic device 500 is folded. When the foldable electronic device 500 is in the folded state, the bendable part 350 of the display screen 300 is bent, and the first part 330 and the second part 340 are relatively arranged. At this time, the display screen 300 is between the first shell 210 and the second shell 220, and the probability of the display screen 300 being damaged can be greatly reduced, and the display screen 300 is effectively protected.

[0120] Please refer to FIG. 2 and FIG. 4, the first shell 210 and the second shell 220 are relatively rotated through the rotating shaft mechanism 100, the display screen 300 is unfolded by relatively moving away the first shell 210 and the second shell 220, and the foldable electronic device 500 is unfolded to a half-unfolded state. When the foldable electronic device 500 is in the half-unfolded state, the first shell 210 and the second shell 220 are unfolded to an angle a, the first part 330 and the second part 340 are relatively unfolded, and the bendable part 350 is unfolded. At this time, the angle between the first part 330 and the second part 340 is a. In this embodiment, a is 90 degrees. In other embodiments, a can also be about 90 degrees, and can also be 80 degrees, 85 degrees, 95 degrees or 0 degrees, etc.

[0121] Please refer to FIG. 3 and FIG. 4, the first shell 210 and the second shell 220 are relatively rotated through the rotating shaft mechanism 100, the display screen 300 is further unfolded by relatively moving away the first shell 210 and the second shell 220, and the foldable electronic device 500 is unfolded. When the folding device 200 is in the unfolded state, the angle between the first shell 210 and the second shell 220 is β. The bendable part 350 is unfolded, and the first part 330 and the second part 340 are relatively unfolded. At this time, the angle between the first part 330, the second part 340 and the bendable part 350 is β, the display screen 300 has a large display area, the large-screen display of the foldable electronic device 500 is realized, and the user experience is improved. In this embodiment, β is 180 degrees. In other embodiments, β can also be about 180 degrees, and can also be 170 degrees, 175 degrees, 185 degrees and 190 degrees, etc.

[0122] It should be noted that the angle a and the angle β are the angles between the first shell 210 and the second shell 220, which are only used to distinguish the angles between the first shell 210 and the second shell 220 in different states of the foldable electronic device 500. Among them, the angle a refers to the angle between the first shell 210 and the second shell 220 when the foldable electronic device 500 is in the half-unfolded state; and the angle β refers to the angle between the first shell 210 and the second shell 220 when the foldable electronic device 500 is in the unfolded state.

[0123] Please refer to FIG. 5 and FIG. 6, FIG. 5 is a structural schematic diagram of the hinge mechanism 100 in the foldable electronic device 500 shown in FIG. 4, and FIG. 6 is an exploded structural schematic diagram of the hinge mechanism 100 shown in FIG. 5.

[0124] The hinge mechanism 100 comprises a base 10, a first rotating assembly 1, a second rotating assembly 2, a first support 51 and a second support 52. The first rotating assembly 1 and the second rotating assembly 2 are respectively located on opposite sides of the base 10 in the width direction (X direction) and are rotationally connected with the base 10. The first support 51 is stacked with the first rotating assembly 1 in the Z direction and is rotationally and slidingly connected with the first rotating assembly 1. The second support 52 is stacked with the second rotating assembly 2 in the Z direction and is rotationally and slidingly connected with the second rotating assembly 2. When the first rotating assembly 1 rotates relative to the base 10, it drives the first support 51 to rotate relative to the base 10 and makes the first support 51 rotate relative to the first rotating assembly 1. When the second rotating assembly 2 rotates relative to the base 10, it drives the second support 52 to rotate relative to the base 10 and makes the second support 52 rotate relative to the second rotating assembly 2, thereby realizing the rotation of the hinge mechanism 100 and switching the hinge mechanism 100 between the folded state and the unfolded state.

[0125] For ease of description, a reference plane P (as shown in FIG. 5) is provided in this application. The reference plane P is perpendicular to the X direction, and the reference plane P passes through the center of the hinge mechanism 100. In this embodiment, the hinge mechanism 100 is mirror-symmetric about the reference plane P. In other embodiments, the hinge mechanism 100 can also be asymmetric.

[0126] Please refer to FIG. 6 and FIG. 7 together, FIG. 7 is a partial structural schematic diagram of the hinge mechanism 100 shown in FIG. 5.

[0127] The hinge mechanism 100 comprises multiple sets of rotating structures. The multiple sets of rotating structures are arranged at intervals along the Y direction on the base 10. In this embodiment, there are three rotating structures. The three rotating structures are respectively a first rotating structure 3, a second rotating structure 3A and a third rotating structure 3B. The first rotating structure 3, the second rotating structure 3A and the third rotating structure 3B are arranged in sequence along the Y direction. Among them, the first rotating structure 3 is located on the positive side of the Y axis of the base, and the third rotating structure 3B is located on the negative side of the Y axis of the base. The second rotating structure 3A is located between the first rotating structure 3 and the second rotating structure 3A to enhance the stability of the entire hinge mechanism 100. In some other embodiments, the rotating structure can also be one, two, or more than four. The number of the above-mentioned rotating structures can be adjusted according to actual conditions, and here the number of the rotating structures is not specifically limited.

[0128] The first rotating structure 3 comprises a first connecting piece 21, a second connecting piece 22, a first swing arm 31, a second swing arm 41, a third swing arm 32 and a fourth swing arm 42. The first connecting piece 21, the first swing arm 31 and the second swing arm 41 are all installed on the positive direction side of the X axis of the base 10. The first connecting piece 21 is fixedly connected with the first shell 210. The first swing arm 31 and the second swing arm 41 are adjacently arranged along the Y direction and are both connected between the base 10 and the first connecting piece 21. Among them, one end of the first swing arm 31 is rotationally connected with the base 10, the other end is rotationally and slidingly connected with the first connecting piece 21, one end of the second swing arm 41 is rotationally connected with the base 10, the other end is slidingly connected with the first connecting piece 21, and the first swing arm 31 and the second swing arm 41 are rotationally and slidingly connected.

[0129] The second connecting piece 22, the third swing arm 32 and the fourth swing arm 42 are all installed on the negative direction side of the X axis of the base 10. The second connecting piece 22 is fixedly connected with the second shell 220. The third swing arm 32 and the fourth swing arm 42 are adjacently arranged along the Y direction and are both connected between the base 10 and the second connecting piece 22. Among them, one end of the third swing arm 32 is rotationally connected with the base 10, the other end is rotationally and slidingly connected with the second connecting piece 22, one end of the fourth swing arm 42 is rotationally connected with the base 10, the other end is slidingly connected with the second connecting piece 22, and the third swing arm 32 and the fourth swing arm 42 are rotationally and slidingly connected.

[0130] In the embodiment, the first swing arm 31, the second swing arm 41, the third swing arm 32 and the fourth swing arm 42 in the first rotating structure 3 are all one. In other embodiments, the first rotating structure 3 can comprise a plurality of first swing arms 31, or / and a plurality of second swing arms 41, or / and a plurality of third swing arms 32, or / and a plurality of fourth swing arms 42.

[0131] The second rotating structure 3A and the first rotating structure 3 can be the same or similar components, symmetrical or partially symmetrical structures, or different structures. In the embodiment, the second rotating structure 3A and the first rotating structure 3 are the same structure. The second rotating structure 3A comprises a first connecting piece 21A, a second connecting piece 22A, a first swing arm 31A, a second swing arm 41A, a third swing arm 32A and a fourth swing arm 42A. The basic structure of each component in the second rotating structure 3A, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can all refer to the related design of the first rotating structure 3, which will not be repeated here.

[0132] The third rotating structure 3B and the first rotating structure 3 can be same or similar components, symmetrical or partially symmetrical structures, or different structures. In the embodiment, the third rotating structure 3B and the first rotating structure 3 are symmetrical structures. The third rotating structure 3B includes the first connecting member 21B, the second connecting member 22B, the first swing arm 31B, the second swing arm 41B, the third swing arm 32B and the fourth swing arm 42B. The basic structure of each component in the third rotating structure 3B, the connection relationship between the components, and the connection relationship between the components and components outside the third rotating structure 3B can be referred to the related designs of the first rotating structure 3, and will not be repeated here.

[0133] In the embodiment, the first connecting members 21 of the plurality of rotating structures are all split structures, i.e., separate structural members, and are not fixed to each other. In other embodiments, the first connecting members of the plurality of rotating structures can be fixedly connected to each other, or can be integrally formed structures. The second connecting members of the plurality of rotating structures can be split structures, can be fixedly connected to each other, or can be integrally formed structures.

[0134] It can be understood that in the embodiment, the first rotating assembly 1 includes the first connecting members 21, 21A, 21B, the first swing arms 31, 31A, 31B and the second swing arms 41, 41A, 41B. The second rotating assembly 2 includes the second connecting members 22, 22A, 22B, the third swing arms 32, 32A, 32B and the fourth swing arms 42, 42A, 42B.

[0135] In some other embodiments, the rotating shaft mechanism 100 can further include a synchronization assembly and a damping assembly (not shown in the figure). The synchronization assembly is installed on the base 10 and is connected with the first connecting member 21 and the second connecting member 22. The synchronization assembly is used to realize the synchronous rotation of the structures on the opposite sides of the base 10 in the X direction, i.e., the synchronous rotation of the first rotating assembly 1 and the second rotating assembly 2. The damping assembly is installed on the base 10 and is connected with the base 10 and the first rotating assembly 1 and the second rotating assembly 2. The damping assembly is used to provide damping force for the rotation of the rotating shaft mechanism 100, thereby providing the user with a damping feeling.

[0136] Please refer to FIG. 8, which is a partially exploded structural schematic view of the rotating shaft mechanism 100 shown in FIG. 6.

[0137] The base 10 is in a long strip structure. The base 10 comprises a top surface 101, a bottom surface 102, a first side surface 103 and a second side surface 104. The top surface 101 and the bottom surface 102 are oppositely arranged along the Z direction. The first side surface 103 and the second side surface 104 are oppositely arranged and respectively located at opposite sides of the X direction, and are connected between the top surface 101 and the bottom surface 102. The top surface 101 is provided with an avoiding groove 105. The avoiding groove 105 is arranged along the Y direction and is located at the center position of the top surface 101 along the X direction. In the embodiment, the avoiding groove 105 is arc-shaped. The avoiding groove 105 is used for avoiding the bendable part of the display screen 300 when the foldable electronic device 500 is in the folded state. That is, when the foldable electronic device 500 is in the folded state, the bendable part of the display screen 300 bends towards the direction of the avoiding groove 105. In the embodiment, by arranging the avoiding groove 105 in the middle of the base 10, it can avoid the base 10 from pressing the display screen 300 when the foldable electronic device 500 is in the folded state, thereby prolonging the service life of the display screen 300.

[0138] It should be understood that the "top", "bottom" and other orientation words used when describing the rotating shaft mechanism 100 are mainly based on the orientation of the rotating shaft mechanism 100 in the drawing 5, and when the rotating shaft mechanism 100 is in the unfolded state, the direction towards the positive direction of the Z axis is "top", and the direction towards the negative direction of the Z axis is "bottom", which does not limit the orientation of the rotating shaft mechanism 100 in the actual application scenario.

[0139] The base 10 is provided with a first rotating groove 11. The first rotating groove 11 is arc-shaped. The first rotating groove 11 is arranged along the X direction and curves towards the bottom surface 102 of the base 10. One end of the extension direction of the first rotating groove 11 is located at the first side surface 103 and penetrates the first side surface 103 in the X direction. The first rotating groove 11 is provided with a first arc-shaped groove 13 at opposite sides in the Y direction. The first arc-shaped groove 13 is arc-shaped and has the same or substantially the same bending radius as the first rotating groove 11. The first rotating groove 11 and the first arc-shaped groove 13 are both used for mounting the first swing arm 31, and the first swing arm 31 can rotate along the first rotating groove 11 and the first arc-shaped groove 13. That is, the first swing arm 31 can slide along the arc-shaped extension direction of the first rotating groove 11 and the arc-shaped extension direction of the first arc-shaped groove 13.

[0140] In the embodiment, the bending radius of each position of the first rotating groove 11 is the same, and the bending radius of each position of the first arc-shaped groove 13 is the same. The axis of the first rotating groove 11 coincides with the axis of the first arc-shaped groove 13 and is parallel to the Y direction. When the first swing arm 31 slides along the first rotating groove 11 and the first arc-shaped groove 13 in an arc shape, it can also be understood that the first rotating groove 11 rotates around the axis of the first rotating groove 11 and the axis of the first arc-shaped groove 13.

[0141] The base 10 is further provided with a second rotating groove 12. The second rotating groove 12 is arc-shaped. The second rotating groove 12 is arranged along the X direction and is curved towards the bottom surface 102 of the base 10. The second rotating groove 12 and the first rotating groove 11 are oppositely arranged along the X direction. One end of the extending direction of the second rotating groove 12 is located on the second side surface 104 and penetrates the second side surface 104 along the X direction. The second rotating groove 12 is provided with a second arc-shaped groove 14 on opposite sides in the Y direction. The second arc-shaped groove 14 is arc-shaped and the curvature is consistent or substantially the same with that of the second rotating groove 12. The second rotating groove 12 and the second arc-shaped groove 14 are both used for mounting the third swing arm 32, and the third swing arm 32 can rotate along the second rotating groove 12 and the second arc-shaped groove 14. That is, the third swing arm 32 can slide along the arc-shaped extending direction of the second rotating groove 12 and the arc-shaped extending direction of the second arc-shaped groove 14. The axis of the second rotating groove 12 coincides with the axis of the second arc-shaped groove 14 and is parallel to the Y direction. When the third swing arm 32 slides along the second rotating groove 12 and the second arc-shaped groove 14 in an arc shape, it can also be understood that the second rotating groove 12 rotates around the axis of the second rotating groove 12 and the axis of the second arc-shaped groove 14.

[0142] The base 10 is further provided with a first shaft hole 15 and a second shaft hole 16. The axial direction of the first shaft hole 15 and the axial direction of the second shaft hole 16 are both parallel to the Y direction, and the first shaft hole 15 and the second shaft hole 16 are arranged side by side and spaced apart along the X direction. The first shaft hole 15 and the first rotating groove 11 are arranged side by side and spaced apart along the Y direction, and the second shaft hole 16 and the second rotating groove 12 are arranged side by side and spaced apart along the Y direction.

[0143] The rotating shaft mechanism 100 further includes a first rotating shaft 17 and a second rotating shaft 18. The first rotating shaft 17 is mounted in the first shaft hole 15, and the first rotating shaft 17 is used to connect with the second swing arm 41 to realize the rotating connection between the second swing arm 41 and the base 10. The second rotating shaft 18 is mounted in the second shaft hole 16, and the second rotating shaft 18 is used to connect with the fourth swing arm 42 to realize the rotating connection between the fourth swing arm 42 and the base 10.

[0144] It should be noted that only the structure of the base 10 in the positive direction of the Y axis is shown in FIG. 8, and the structure of the base 10 in the negative direction of the Y axis is the same as or similar to that in the positive direction of the Y axis, and the structure of the base 10 in the negative direction of the Y axis can be appropriately adjusted according to the structure of the rotating structure mounted in the base 10 in the positive direction of the Y axis.

[0145] Please refer to FIGS. 9-11. FIG. 9 is a structural schematic diagram of the first connecting piece 21 and the second connecting piece 22 in the rotating shaft mechanism 100 shown in FIG. 6, FIG. 10 is a structural schematic diagram of the first connecting piece 21 and the second connecting piece 22 in another angle shown in FIG. 9, and FIG. 11 is a sectional structural schematic diagram of the first connecting piece 21 and the second connecting piece 22 along the A-A direction shown in FIG. 9.

[0146] The first connecting piece 21 comprises a first surface 201, a second surface 202, a first side surface 203 and a second side surface 204. The first surface 201 and the second surface 202 are oppositely arranged along the Z direction. The first side surface 203 and the second side surface 204 are oppositely arranged along the X direction and are connected between the first surface 201 and the second surface 202. In the embodiment, the first connecting piece 21 is a wedge-shaped block, and a cross section of the first connecting piece 21 perpendicular to the Y direction is wedge-shaped. The second surface 202 is a plane and is parallel to the XY plane. The first surface 201 is an inclined surface, and an included angle between the first surface 201 and the second surface 202 is greater than 0 degrees and less than 90 degrees. The distance between the first surface 201 and the second surface 202 gradually decreases in the direction from the second side surface 204 to the first side surface 203.

[0147] The first connecting piece 21 is provided with a second sliding groove 213. The second sliding groove 213 is used for mounting the first swing arm 31 to realize the rotating and sliding connection between the first swing arm 31 and the first connecting piece 21. The depth direction of the second sliding groove 213 is parallel to the Y direction, that is, the length direction of the second sliding groove 213 is parallel to the Y direction. The second sliding groove 213 comprises a first position 217 and a second position 218. The first position 217 and the second position 218 are respectively located at opposite ends of the extension direction of the second sliding groove 213. The first position 217 and the second position 218 are spaced apart in the Z direction. Moreover, the second position 218 is located on the negative side of the Z axis of the first position 217. That is, the first position 217 is located at one end of the second sliding groove 213 close to the first surface 201, and the second position 218 is located at one end of the second sliding groove 213 close to the second surface 202.

[0148] In the embodiment, the first position 217 and the second position 218 are also spaced apart in the X direction. That is, the first position 217 and the second position 218 are staggered in the X direction and the Z direction. That is, the connection line of the first position 217 and the second position 218 intersects the X direction and the Z direction. The second position 218 is located on the negative side of the X axis of the first position 217. That is, the first position 217 is located at one end of the second sliding groove 213 close to the first surface 201 and the second side surface 204, and the second position 218 is located at one end of the second sliding groove 213 close to the second surface 202 and the first side surface 203. In other embodiments, the second position 218 is located on the positive side of the X axis of the first position 217. Alternatively, the second position 218 can also be arranged side by side with the first position 217 in the Z direction, that is, the connection line of the second position 218 and the first position 217 is parallel to the Z direction.

[0149] In the embodiment, the second sliding groove 213 is an arc-shaped groove. That is, the second sliding groove 213 is arc-shaped in the cross section perpendicular to the Y direction. For example, the center of the arc of the second sliding groove 213 is located on the positive direction of the X axis of the second sliding groove 213. Alternatively, the center of the arc of the second sliding groove 213 can be located on the negative direction of the X axis of the second sliding groove 213. Alternatively, the second sliding groove 213 can be linear or have other shapes.

[0150] In the embodiment, the first connecting piece 21 is further provided with a first notch 211. The first notch 211 is recessed in the first surface 201 and penetrates the first side surface 203. The first notch 211 is provided with a first shaft seat 212. The first shaft seat 212 faces the first side surface 203. There are two second sliding grooves 213. One of the two second sliding grooves 213 is arranged in the first shaft seat 212 and penetrates the first shaft seat 212 along the Y direction. The other second sliding groove 213 is arranged on the side wall of the first notch 211 and communicates with the first notch 211. The two second sliding grooves 213 are arranged in parallel and spaced apart along the Y direction. The two second sliding grooves 213 are used to rotatably and slidably connect the first swing arm 31, so as to improve the connection stability of the first swing arm 31 and the first connecting piece 21.

[0151] As shown in FIGS. 9 and 10, the first connecting piece 21 is further provided with a fifth sliding groove 214 and a sixth sliding groove 219. The fifth sliding groove 214 is used to mount the second swing arm 41, and the second swing arm 41 can slide along the fifth sliding groove 214. The extension direction of the fifth sliding groove 214 is parallel or substantially parallel to the width direction of the first surface 201. Alternatively, the extension direction of the fifth sliding groove 214 can be parallel to the X direction. The opposite ends of the extension direction of the fifth sliding groove 214 penetrate the first side surface 203 and the second side surface 204, respectively.

[0152] In the embodiment, the fifth sliding groove 214 includes a first sub-sliding groove 215 and a second sub-sliding groove 216. The first sub-sliding groove 215 and the second sub-sliding groove 216 are arranged in parallel along the Y direction and are arranged side by side with the first notch 211 along the Y direction. The first sub-sliding groove 215 is located between the second sub-sliding groove 216 and the first notch 211, and the first sub-sliding groove 215 communicates with the first notch 211.

[0153] The sixth sliding groove 219 is an arc-shaped groove and is used to rotatably connect the first supporting piece 51. In the embodiment, the sixth sliding groove 219 is arranged at one end of the first connecting piece 21 in the Y direction.

[0154] Please continue to refer to FIG. 9 to FIG. 11, the second connecting piece 22 and the first connecting piece 21 are mirror-symmetrical about the reference surface P. The second connecting piece 22 comprises a third surface 205, a fourth surface 206, a third side surface 207 and a fourth side surface 208. The third surface 205 and the fourth surface 206 are oppositely arranged along the Z direction. The third side surface 207 and the fourth side surface 208 are oppositely arranged along the X direction, and are both connected between the third surface 205 and the fourth surface 206.

[0155] The second connecting piece 22 is provided with a fourth sliding groove 223. The fourth sliding groove 223 is used for mounting the third swing arm 32, so as to realize the rotating and sliding connection between the third swing arm 32 and the second connecting piece 22. The depth direction of the fourth sliding groove 223 is parallel to the Y direction, that is, the length direction of the fourth sliding groove 223 is parallel to the Y direction. The fourth sliding groove 223 comprises a third position 227 and a fourth position 228. The third position 227 and the fourth position 228 are respectively located at opposite ends of the extension direction of the fourth sliding groove 223. The third position 227 and the fourth position 228 are both spaced apart in the Z direction. And, the fourth position 228 is located on the Z-axis negative direction side of the third position 227. That is, the third position 227 is located at one end of the fourth sliding groove 223 close to the third surface 205, and the fourth position 228 is located at one end of the fourth sliding groove 223 close to the fourth surface 206.

[0156] In the embodiment, the third position 227 and the fourth position 228 are also spaced apart in the X direction. That is, the third position 227 and the fourth position 228 are both misaligned in the X direction and the Z direction. That is, the connecting line of the third position 227 and the fourth position 228 intersects with the X direction and the Z direction. Among them, the fourth position 228 is located on the X-axis positive direction side and the Z-axis negative direction side of the third position 227. That is, the third position 227 is located at one end of the fourth sliding groove 223 close to the third surface 205 and the fourth side surface 208, and the fourth position 228 is located at one end of the fourth sliding groove 223 close to the fourth surface 206 and the third side surface 207. In other embodiments, the third position 227 and the fourth position 228 are both misaligned in the X direction and the Z direction, and the fourth position 228 can also be located on the X-axis positive direction side of the third position 227. Or, the fourth position 228 can also be arranged side by side with the third position 227 in the Z direction, that is, the connecting line of the fourth position 228 and the third position 227 is parallel to the Z direction.

[0157] In the embodiment, the fourth sliding groove 223 is an arc-shaped groove. That is, the fourth sliding groove 223 is arc-shaped along the cross section perpendicular to the Y direction. For example, the center of the fourth sliding groove 223 is located on the X-axis negative direction side of the fourth sliding groove 223. Or, the center of the fourth sliding groove 223 can also be located on the X-axis positive direction side of the fourth sliding groove 223. Or, the fourth sliding groove 223 can also be linear, or other shapes.

[0158] In this embodiment, the second connecting member 22 is provided with a second notch 221. The second notch 221 is provided with a second shaft seat 222. The second shaft seat 222 faces the fourth side surface 208. The fourth sliding groove 223 has two. One of the fourth sliding grooves 223 is arranged in the second shaft seat 222 and penetrates the second shaft seat 222 along the Y direction. The other fourth sliding groove 223 is arranged on the side wall of the second notch 221 and communicates with the second notch 221. The two fourth sliding grooves 223 are arranged in parallel and spaced apart along the Y direction. The two fourth sliding grooves 223 are used for rotating and sliding connection with the third swing arm 32, so as to improve the connection stability of the third swing arm 32 and the second connecting member 22.

[0159] The second connecting member 22 is also provided with a seventh sliding groove 224 and an eighth sliding groove 229. The seventh sliding groove 224 is used for mounting the fourth swing arm 42, and the fourth swing arm 42 can slide along the seventh sliding groove 224. The opposite ends of the extension direction of the seventh sliding groove 224 penetrate the third side surface 207 and the fourth side surface 208, respectively. The seventh sliding groove 224 includes a third sub-sliding groove 225 and a fourth sub-sliding groove 226. The third sub-sliding groove 225 and the fourth sub-sliding groove 226 are arranged in parallel along the Y direction and arranged side by side with the second notch 221 along the Y direction. Among them, the third sub-sliding groove 225 is located between the fourth sub-sliding groove 226 and the second notch 221, and the third sub-sliding groove 225 communicates with the second notch 221.

[0160] The eighth sliding groove 229 is used for rotating and sliding connection with the second supporting member 52. In this embodiment, the eighth sliding groove 229 is arranged at one end of the second connecting member 22 in the Y direction. The extension direction of the eighth sliding groove 229 intersects with the X direction and the Z direction. The eighth sliding groove 229 can be arc-shaped or linear.

[0161] Please refer to FIG. 12 and FIG. 13. FIG. 12 is a structural schematic diagram of the first swing arm 31 and the third swing arm 32 in the rotating shaft mechanism 100 shown in FIG. 6. FIG. 13 is a structural schematic diagram of the first swing arm 31 and the third swing arm 32 shown in FIG. 12 at another angle.

[0162] The first swing arm 31 includes a first rotating body 311, a first swing body 312, a first shaft body 313, a first sliding rail 315 and a first arc-shaped block 314. The bottom surface 102 of the first rotating body 311 is an arc surface, and the structure of the first rotating body 311 matches the structure of the first rotating groove 11 arranged on the base 10. That is, the bending radius of the bottom surface 102 of the first rotating body 311 is consistent or approximately the same as the bending radius of the groove bottom wall of the first rotating groove 11. When the first swing arm 31 is mounted on the first rotating groove 11, the bottom surface 102 of the first rotating body 311 faces the groove bottom wall of the first rotating groove 11 and can rotate along the groove bottom wall of the first rotating groove 11.

[0163] In the embodiment, the first arc-shaped blocks 314 are two. The two first arc-shaped blocks 314 are respectively connected to opposite sides of the first rotating body 311 in the Y direction. The first arc-shaped blocks 314 are in an arc-shaped structure. That is, the cross section of the first arc-shaped blocks 314 is arc-shaped. The structure of the first arc-shaped blocks 314 matches the structure of the first arc-shaped slots 13 provided on the base 10. The first arc-shaped blocks 314 are installed in the first arc-shaped slots 13 and can slide along the arc-shaped extension direction of the first arc-shaped slots 13.

[0164] The first swinging body 312 is connected to one end of the extension direction of the first rotating body 311. The first shaft body 313 is connected to the end of the first swinging body 312 away from the first rotating body 311. The extension direction of the first shaft body 313 is parallel to the Y direction. The first shaft body 313 is used to be connected with the second sliding slot 213 to realize the rotating and sliding connection of the first swing arm 31 and the first connecting piece 21.

[0165] In the embodiment, the first shaft body 313 is two. The two first shaft bodies 313 are spaced apart in the Y direction, and the axes of the two first shaft bodies 313 coincide. One of the first shaft bodies 313 is installed in the second sliding slot 213 provided on the first shaft seat 212, and the other first shaft body 313 is installed in the second sliding slot 213 provided on the side wall of the first notch 211. Both of the two first shaft bodies 313 can rotate and slide along the corresponding second sliding slot 213 to improve the connection stability of the first swing arm 31 and the first connecting piece 21. In other embodiments, the first shaft body 313 can also be one, and the corresponding second sliding slot 213 is one to simplify the structure of the first swing arm 31 and the first connecting piece 21.

[0166] The first sliding rail 315 is connected to the side surface of the first swinging body 312 and is used to be rotatably and slidably connected with the second swing arm 41. The first sliding rail 315 is in a strip-shaped plate structure. The first sliding rail 315 includes a first end 318 and a second end 319. The first end 318 and the second end 319 are respectively located at opposite ends of the extension direction of the first sliding rail 315. The first end 318 and the second end 319 are arranged in a staggered manner in the thickness direction of the first swing arm 31 and the length direction of the first swing arm 31. It should be noted that when the rotating shaft mechanism 100 is in the unfolded state, the thickness direction of the first swing arm 31 is parallel or substantially parallel to the Z direction, the length direction of the first swing arm 31 is parallel or substantially parallel to the X direction, and the width direction of the first swing arm 31 is parallel or substantially parallel to the Y direction.

[0167] That is, when the rotation shaft mechanism 100 is in the unfolded state, the first end 318 and the second end 319 are arranged in a staggered manner along the X direction and the Z direction. That is, the connecting line of the first end 318 and the second end 319 intersects with the X direction and the Z direction. The second end 319 is located in the X-axis negative direction and the Z-axis positive direction of the first end 318. That is, the second end 319 is located on the side of the first end 318 facing the base, and the second end 319 is located on the side of the first end 318 facing the display screen.

[0168] In this embodiment, the first sliding rail 315 is an arc-shaped sliding rail. That is, the cross section of the first sliding rail 315 is arc-shaped. The first sliding rail 315 includes a first section 316 and a second section 317. The first section 316 and the second section 317 are connected along the extension direction of the first sliding rail 315. The first section 316 is located on the side of the second section 317 close to the first shaft body 313. The first end 318 is located on the end of the first section 316 away from the second section 317, and the second end 319 is located on the end of the second section 317 away from the first section 316. In this embodiment, the center of the first sliding rail 315 is located on the Z-axis positive direction side of the first sliding rail 315, that is, the center of the first sliding rail 315 is located on the side of the first sliding rail 315 facing the display screen 300. The curvature radius of the first section 316 is greater than the curvature radius of the second section 317. That is, the bending degree of the first section 316 is less than the bending degree of the second section 317. For example, the first section 316 is substantially linear, and the second section 317 is arc-shaped. The extension direction of the first section 316 is substantially parallel to the extension direction of the first swing body 312. Alternatively, the extension direction of the first section 316 and the extension direction of the first swing body 312 also have a small included angle. The second section 317 extends in an arc shape toward the top surface direction of the first swing body 312, that is, toward the Z-axis positive direction. Alternatively, the first section 316 and the second section 317 can both be arc-shaped. The "extension direction of the first swing body 312" refers to the extension direction of the first swing body 312 from the base 10 toward the first connecting piece 21.

[0169] In an embodiment, the first sliding rail 315 is arc-shaped, and the center of the first sliding rail 315 is located on the Z-axis negative direction side of the first sliding rail 315, that is, the second section 317 extends in an arc shape toward the bottom surface direction of the first swing body 312, that is, toward the Z-axis negative direction. Alternatively, the first sliding rail 315 can also be linear. That is, the first section 316 and the second section 317 are both linear and connected in a straight line. The shape of the first sliding rail 315 is not limited here as long as the first swing arm 31 and the second swing arm 41 can be rotationally and slidingly connected.

[0170] Please continue to refer to FIG. 12 and FIG. 13, the third swing arm 32 is mirror-symmetrical with the first swing arm 31. The third swing arm 32 comprises a second rotating body 321, a second swing body 322, a second shaft body 323, a second sliding rail 325 and a second arc block 324. The second rotating body 321 and the second shaft body 323 are respectively connected to opposite ends of the second swing body 322.

[0171] The extending direction of the second shaft body 323 is parallel to the Y direction. The second shaft body 323 is used to connect with the fourth sliding groove 223 to realize the rotating and sliding connection between the third swing arm 32 and the second connecting piece 22. In the embodiment, the second shaft body 323 is two. The two second shaft bodies 323 are arranged in the Y direction and the axes of the two second shaft bodies 323 coincide. One of the second shaft bodies 323 is installed in the fourth sliding groove 223 arranged in the second shaft seat 222, and the other second shaft body 323 is installed in the fourth sliding groove 223 arranged in the side wall of the second gap 221. The two second shaft bodies 323 can rotate and slide along the corresponding fourth sliding groove 223 to improve the connection stability of the third swing arm 32 and the second connecting piece 22. In other embodiments, the second shaft body 323 can be one, and the corresponding fourth sliding groove 223 can be one to simplify the structure of the third swing arm 32 and the second connecting piece 22.

[0172] The bottom surface 102 of the second rotating body 321 is arc-shaped, and the structure of the second rotating body 321 matches the structure of the second rotating groove 12 arranged in the base 10. When the third swing arm 32 is installed in the second rotating groove 12, the bottom surface 102 of the second rotating body 321 faces the groove bottom wall of the second rotating groove 12 and can rotate along the groove bottom wall of the second rotating groove 12. The second arc block 324 is two. The two second arc blocks 324 are respectively connected to opposite sides of the second rotating body 321 in the Y direction. The second arc block 324 is arc-shaped, and the structure of the second arc block 324 matches the structure of the second arc groove 14 arranged in the base 10. The second arc block 324 is installed in the second arc groove 14 and can slide along the arc-shaped extending direction of the second arc groove 14.

[0173] The second sliding rail 325 is connected to the side of the second swing body 322 and is used to rotate and slide with the fourth swing arm 42. The second sliding rail 325 is a strip structure. The second sliding rail 325 includes a third end 328 and a fourth end 329. The third end 328 and the fourth end 329 are respectively located at opposite ends of the extension direction of the second sliding rail 325. The third end 328 and the fourth end 329 are arranged in a staggered manner along the thickness direction of the third swing arm 32 and the length direction of the third swing arm 32. It should be noted that when the rotating shaft mechanism 100 is in the unfolded state, the thickness direction of the third swing arm 32 is parallel or substantially parallel to the Z direction, the length direction of the third swing arm 32 is parallel or substantially parallel to the X direction, and the width direction of the third swing arm 32 is parallel or substantially parallel to the Y direction. That is, when the rotating shaft mechanism 100 is in the unfolded state, the third end 328 and the fourth end 329 are arranged in a staggered manner along the X direction and the Z direction. That is, the connecting line of the third end 328 and the fourth end 329 intersects the X direction and the Z direction. Among them, the fourth end 329 is located in the X-axis positive direction and the Z-axis positive direction of the third end 328. That is, the fourth end 329 is located on the side of the third end 328 facing the base 10, and the fourth end 329 is located on the side of the third end 328 facing the display screen 300.

[0174] In this embodiment, the second sliding rail 325 is an arc-shaped sliding rail. That is, the cross section of the second sliding rail 325 is arc-shaped. The second sliding rail 325 includes a third segment 326 and a fourth segment 327. The third segment 326 and the fourth segment 327 are connected along the extension direction of the second sliding rail 325. The third segment 326 is located on the side of the fourth segment 327 close to the second shaft body 323. Among them, the third end 328 is located at one end of the third segment 326 away from the fourth segment 327, and the fourth end 329 is located at one end of the fourth segment 327 away from the third segment 326. In this embodiment, the center of the second sliding rail 325 is located on the Z-axis positive side of the second sliding rail 325, that is, the center of the second sliding rail 325 is located on the side of the second sliding rail 325 facing the display screen. The radius of curvature of the third segment 326 is greater than the radius of curvature of the fourth segment 327. That is, the bending degree of the third segment 326 is less than the bending degree of the fourth segment 327. For example, the third segment 326 is substantially linear, and the fourth segment 327 is arc-shaped. The extension direction of the third segment 326 is substantially parallel to the extension direction of the second swing body 322. Alternatively, the extension direction of the third segment 326 and the extension direction of the second swing body 322 can also have a small included angle. The fourth segment 327 extends in an arc shape towards the top surface direction of the second swing body 322, that is, towards the Z-axis positive direction. Alternatively, the third segment 326 and the fourth segment 327 can also be arc-shaped. Among them, the "extension direction of the second swing body 322" refers to the extension direction of the second swing body 322 from the base 10 towards the second connecting piece 22.

[0175] In an embodiment, the second slide rail 325 is an arc-shaped slide rail, and the center of the arc is located on the negative Z-axis side of the second slide rail 325, that is, the fourth section 327 extends in an arc shape towards the bottom surface of the second swing body 322, that is, extends towards the negative Z-axis. Alternatively, the second slide rail 325 can also be linear. That is, the third section 326 and the fourth section 327 are both linear and are linearly connected. The shape of the second slide rail 325 is not specifically limited here, as long as the third swing arm 32 and the fourth swing arm 42 can be rotationally and slidably connected.

[0176] Please refer to FIG. 7 and FIG. 14, FIG. 14 is a sectional structure diagram of the rotating shaft mechanism 100 along the direction of B-B in FIG. 7.

[0177] The first connecting member 21 and the first swing arm 31 are both installed on the positive X-axis side of the base 10, and the first swing arm 31 is connected between the base 10 and the first connecting member 21. The first connecting member 21 is fixedly connected with the first housing 210. The first rotating body 311 is installed in the first rotating groove 11, and the bottom wall of the first rotating body 311 faces the groove bottom wall of the first rotating groove 11. The first arc-shaped block 314 is installed in the first arc-shaped groove 13. The end of the first swing body 312 away from the first rotating body 311 is located in the first notch 211 of the first connecting member 21. The first shaft body 313 is installed in the second sliding groove 213, and the first shaft body 313 can slide along the second sliding groove 213, and at the same time, the first shaft body 313 can rotate around the axis of the first shaft body 313, so as to realize the rotational and sliding connection between the first swing arm 31 and the first connecting member 21. Specifically, two first shaft bodies 313 are respectively installed in the corresponding second sliding grooves 213, and each first shaft body 313 can slide along the corresponding second sliding groove 213, and at the same time, can rotate around the axis of the first shaft body 313.

[0178] When the first shell 210 rotates relative to the base 10, the first connecting piece 21 is driven to rotate relative to the base 10, and the first rotating body 311 is driven to rotate relative to the base 10 through the first shaft body 313, so that the first rotating body 311 slides along the first rotating groove 11 in an arc shape, and the first arc-shaped block 314 slides along the first arc-shaped groove 13 in an arc shape. The "first rotating body 311 slides along the first rotating groove 11 in an arc shape" can be understood as the first rotating body 311 rotating around the axis of the first rotating groove 11. The "axis of the first rotating groove 11" is a straight line where the center of curvature of the first rotating groove 11 is located. The "first arc-shaped block 314 slides along the first arc-shaped groove 13 in an arc shape" can be understood as the first arc-shaped block 314 rotating around the axis of the first arc-shaped groove 13. The "axis of the first arc-shaped groove 13" is a straight line where the center of curvature of the first arc-shaped groove 13 is located. When the first connecting piece 21 rotates relative to the base 10, the first shaft body 313 can also slide along the second sliding groove 213, and the first shaft body 313 can rotate around the axis of the first shaft body 313, thereby realizing the rotational connection between the first swing arm 31 and the base 10, and the rotational and sliding connection between the first swing arm 31 and the first connecting piece 21.

[0179] The second connecting piece 22 and the third swing arm 32 are both installed on the side of the base 10 in the negative direction of the X axis, and the third swing arm 32 is connected between the base 10 and the second connecting piece 22. The second connecting piece 22 is fixedly connected with the second shell 220. The second rotating body 321 is installed in the second rotating groove 12, and the second arc-shaped block 324 is installed in the second arc-shaped groove 14. The end of the second swing body 322 away from the second rotating body 321 is located in the second gap 221 of the second connecting piece 22. The second shaft body 323 is installed in the fourth sliding groove 223, and the second shaft body 323 can slide along the fourth sliding groove 223, and the second shaft body 323 can rotate around the axis of the second shaft body 323, thereby realizing the rotational and sliding connection between the third swing arm 32 and the second connecting piece 22. Specifically, two second shaft bodies 323 are respectively installed in corresponding fourth sliding grooves 223, and each second shaft body 323 can slide along the corresponding fourth sliding groove 223, and can rotate around the axis of the second shaft body 323.

[0180] When the second shell 220 rotates relative to the base 10, the second connecting piece 22 is driven to rotate relative to the base 10, and the second swing body 322 is driven to rotate relative to the base 10 through the second shaft body 323, so that the second rotating body 321 slides along the second rotating groove 12 in an arc shape, and the second arc-shaped block 324 slides along the second arc-shaped groove 14 in an arc shape. When the second connecting piece 22 rotates relative to the base 10, the second shaft body 323 can also slide along the fourth sliding groove 223, and the second shaft body 323 can rotate around the axis of the second shaft body 323, thereby realizing the rotational connection between the third swing arm 32 and the base 10, and the rotational and sliding connection between the third swing arm 32 and the second connecting piece 22.

[0181] The rotating direction of the first connecting member 21 is opposite to the rotating direction of the second connecting member 22, and the rotating direction of the first swing arm 31 is opposite to the rotating direction of the third swing arm 32. For example, when the rotating shaft mechanism 100 is switched from the unfolded state to the folded state, the first connecting member 21 and the first swing arm 31 rotate in the counterclockwise direction, and the second connecting member 22 and the third swing arm 32 rotate in the clockwise direction. When the rotating shaft mechanism 100 is switched from the folded state to the unfolded state, the first connecting member 21 and the first swing arm 31 rotate in the clockwise direction, and the second connecting member 22 and the third swing arm 32 rotate in the counterclockwise direction.

[0182] Please refer to FIG. 15, which is a structural schematic diagram of the second swing arm 41 and the fourth swing arm 42 in the rotating shaft mechanism 100 shown in FIG. 6.

[0183] The second swing arm 41 comprises a first sliding body 411, a third shaft seat 414, a first sliding column 417, a second sliding column 418, and a third shaft body 419. The third shaft seat 414 is provided with a third shaft hole 415. The third shaft hole 415 penetrates the third shaft seat 414 along the Y direction. The first sliding body 411 comprises a first sub-sliding body 412 and a second sub-sliding body 413. The first sub-sliding body 412 and the second sub-sliding body 413 are arranged in the Y direction and connected with the third shaft seat 414.

[0184] The extending directions of the first sliding column 417 and the second sliding column 418 are parallel to the Y direction. The first sliding column 417 and the second sliding column 418 are fixed to the first sub-sliding body 412 and protrude from the side of the first sub-sliding body 412. The first sliding column 417 and the second sliding column 418 are arranged in the Y direction. The first sliding column 417 and the second sliding column 418 are used to slide and rotate with the first sliding rail 315. In this embodiment, the first sliding column 417 and the second sliding column 418 are both cylindrical. In other embodiments, the first sliding column 417 or / and the second sliding column 418 can also be other special-shaped structures with arc-shaped sliding surfaces.

[0185] In this embodiment, the third shaft body 419 is cylindrical, and the axial direction of the third shaft body 419 is parallel to the Y direction. The third shaft body 419 is fixed to the side of the second sub-sliding body 413 and arranged opposite to the first sliding column 417 and the second sliding column 418. The third shaft body 419 is used to rotate and slide with the first supporting member 51.

[0186] The fourth swing arm 42 is mirror-symmetrical with the second swing arm 41. The fourth swing arm 42 comprises a second sliding body 421, a fourth shaft seat 424, a third sliding column 427, a fourth sliding column 428, and a fourth shaft body 429. The fourth shaft seat 424 is provided with a fourth shaft hole 425. The fourth shaft hole 425 penetrates the fourth shaft seat 424 along the Y direction. The second sliding body 421 comprises a third sub-sliding body 422 and a fourth sub-sliding body 423. The third sub-sliding body 422 and the fourth sub-sliding body 423 are arranged along the Y direction and connected with the fourth shaft seat 424.

[0187] The third sliding column 427 and the fourth sliding column 428 are parallel to the Y direction. The third sliding column 427 and the fourth sliding column 428 are fixed to the third sub-sliding body 422 and protrude from the side of the third sub-sliding body 422. The third sliding column 427 and the fourth sliding column 428 are arranged along the Z direction. The third sliding column 427 and the fourth sliding column 428 are used to slide and rotate with the second sliding rail 325. In this embodiment, the third sliding column 427 and the fourth sliding column 428 are cylindrical. In other embodiments, the third sliding column 427 and / or the fourth sliding column 428 can also be other special-shaped structures with arc-shaped sliding surfaces.

[0188] In this embodiment, the fourth shaft body 429 is cylindrical, and the axis of the fourth shaft body 429 is parallel to the Y direction. The fourth shaft body 429 is fixed to the side of the fourth sub-sliding body 423 and arranged opposite to the third sliding column 427 and the fourth sliding column 428. The fourth shaft body 429 is used to rotate and slide with the second support 52.

[0189] Please refer to FIG. 7 and FIG. 16. FIG. 16 is a sectional view of the rotating shaft mechanism 100 along the C-C direction shown in FIG. 7.

[0190] The second swing arm 41 is connected between the base 10 and the first connecting piece 21 and arranged along the Y direction sequentially with the first swing arm 31. The third shaft seat 414 faces the base 10, the axis of the third shaft hole 415 coincides or approximately coincides with the axis of the first shaft hole 15, and the first rotating shaft 17 penetrates the first shaft hole 15 and the third shaft hole 415. In this embodiment, the first rotating shaft 17 is fixedly connected with the base 10 and rotatably connected with the third shaft seat 414. In other embodiments, the first rotating shaft 17 can be rotatably connected with the base 10 and fixedly connected with the third shaft seat 414. The first sliding body 411 is installed in the fifth sliding groove 214. The first sub-sliding body 412 is installed in the first sub-sliding groove 215, and the second sub-sliding body 413 is installed in the second sub-sliding groove 216. The first sliding column 417 and the second sliding column 418 face the first notch 211. The first sliding column 417 and the second sliding column 418 are respectively located on opposite sides of the thickness direction of the first sliding rail 315. That is, the first sliding column 417 and the second sliding column 418 clamp the first sliding rail 315.

[0191] When the first connecting member 21 rotates relative to the base 10, the first swing arm 31 and the second swing arm 41 are driven to rotate relative to the base 10. The second swing arm 41 rotates about the first rotating shaft 17, the first sub sliding body 412 slides along the first sub sliding groove 215, the second sub sliding body 413 slides along the second sub sliding groove 216, the first sliding column 417 and the second sliding column 418 slide along the first sliding rail 315, and the first sliding column 417 rotates about the axial direction of the first sliding column 417, and the second sliding column 418 rotates about the axial direction of the second sliding column 418.

[0192] It should be noted that in the embodiment, the first sliding column 417 and the second sliding column 418 are spaced apart and misaligned in the Z direction. In other embodiments, the first sliding column 417 and the second sliding column 418 can also be spaced apart and aligned relative to each other in the Z direction. In actual design, the positions of the first sliding column 417 and the second sliding column 418 can be adjusted according to the position and shape of the first sliding rail 315, and here the specific positions of the first sliding column 417 and the second sliding column 418 are not limited, as long as the first sliding column 417 and the second sliding column 418 can slide along the first sliding rail 315 and rotate.

[0193] In the embodiment, the first sliding rail 315 is clamped between the first sliding column 417 and the second sliding column 418, and the first sliding rail 315 is limited by the first sliding column 417 and the second sliding column 418, so that the first sliding column 417 and the second sliding column 418 can slide along the extension direction of the first sliding rail 315 without being separated from the first sliding rail 315, that is, without deviating from the predetermined motion trajectory, thereby improving the rotation stability of the rotating shaft mechanism 100.

[0194] The fourth swing arm 42 is connected between the base 10 and the second connecting member 22, and is arranged along the Y direction with the third swing arm 32. The fourth shaft seat 424 faces the base 10, the axis of the fourth shaft hole 425 coincides or substantially coincides with the axis of the second shaft hole 16, and the second rotating shaft 18 is arranged in the second shaft hole 16 and the fourth shaft hole 425. In the embodiment, the second rotating shaft 18 is fixedly connected with the base 10 and is rotatably connected with the fourth shaft seat 424. The third sub sliding body 422 of the second sliding body 421 is installed in the third sub sliding groove 225, and the fourth sub sliding body 423 is installed in the fourth sub sliding groove 226. The second sliding column 418 faces the second gap 221. The third sliding column 427 and the fourth sliding column 428 are respectively located on opposite sides of the thickness direction of the second sliding rail 325. That is, the third sliding column 427 and the fourth sliding column 428 clamp the second sliding rail 325.

[0195] When the second connecting member 22 rotates relative to the base 10, the third swing arm 32 and the fourth swing arm 42 are driven to rotate relative to the base 10 at the same time. The fourth swing arm 42 rotates around the second rotation shaft 18, the third sub sliding body 422 slides along the third sub sliding groove 225, the fourth sub sliding body 423 slides along the fourth sub sliding groove 226, the third sliding column 427 and the fourth sliding column 428 slide along the second sliding rail 325, at the same time, the third sliding column 427 rotates around the axial direction of the third sliding column 427, and the fourth sliding column 428 rotates around the axial direction of the fourth sliding column 428.

[0196] It should be noted that in the embodiment, the third sliding column 427 and the fourth sliding column 428 are spaced apart and misaligned in the Z direction. In other embodiments, the third sliding column 427 and the fourth sliding column 428 can also be spaced apart and aligned relative to each other in the Z direction. In actual design, the positions of the third sliding column 427 and the fourth sliding column 428 can be adjusted according to the position and shape of the second sliding rail 325, and here the specific positions of the third sliding column 427 and the fourth sliding column 428 are not limited, as long as the third sliding column 427 and the fourth sliding column 428 can slide along the second sliding rail 325 and rotate.

[0197] In the embodiment, the second sliding rail 325 is clamped between the third sliding column 427 and the fourth sliding column 428, and the second sliding rail 325 is limited by the third sliding column 427 and the fourth sliding column 428, so that the third sliding column 427 and the fourth sliding column 428 can slide along the extension direction of the second sliding rail 325 without deviating from the second sliding rail 325, that is, without deviating from the predetermined motion trajectory, thereby further improving the rotation stability of the rotation shaft mechanism 100.

[0198] As shown in FIGS. 14 and 16, when the rotation shaft mechanism 100 is in the unfolded state, the first connecting member 21 and the second connecting member 22 are unfolded relative to the base 10, the first swing arm 31 and the third swing arm 32 are unfolded relative to the base 10, and the second swing arm 41 and the fourth swing arm 42 are unfolded relative to the base 10. The first shaft body 313 is located at one end of the second sliding groove 213 close to the first surface 201, and the second shaft body 323 is located at one end of the fourth sliding groove 223 close to the third surface 205. That is, the first shaft body 313 is located at the first position 217 of the second sliding groove 213, and the second shaft body 323 is located at the third position 227 of the fourth sliding groove 223. The first sliding column 417 and the second sliding column 418 are located at the first section 316 of the first sliding rail 315, and are located at the first end 318 of the first section 316, or the first sliding column 417 and the second sliding column 418 are close to the first end 318. The third sliding column 427 and the fourth sliding column 428 are located at the third section 326 of the second sliding rail 325, and are located at the third end 328 of the third section 326, or the third sliding column 427 and the fourth sliding column 428 are close to the third end 328.

[0199] Please refer to FIG. 17 and FIG. 18, FIG. 17 is a cross-sectional view of the hinge mechanism 100 in the folded state, and FIG. 18 is a cross-sectional view of the hinge mechanism 100 in the folded state. In FIG. 17, the dashed line is a contour of the first connecting member 21 and the first swing arm 31 when the hinge mechanism 100 is in the unfolded state.

[0200] When the hinge mechanism 100 is rotated from the unfolded state to the folded state, the first connecting member 21 and the second connecting member 22 are rotated towards the opposite direction. That is, the first connecting member 21 is rotated in the counterclockwise direction, and the second connecting member 22 is rotated in the clockwise direction. The first connecting member 21 is rotated in the counterclockwise direction, thereby driving the first swing arm 31 and the second swing arm 41 to rotate in the counterclockwise direction simultaneously. When the first swing arm 31 is rotated in the counterclockwise direction, the first rotating body 311 slides along the first rotating groove 11 towards the first side surface 103. At the same time, the first swing arm 31 moves relative to the first connecting member 21 in the opposite direction of the rotation direction of the first connecting member 21. Specifically, the first swing arm 31 can move relative to the first connecting member 21 in the direction completely opposite to the rotation direction of the first connecting member 21, that is, the first swing arm 31 rotates relative to the first connecting member 21 in the clockwise direction. Alternatively, the first swing arm 31 has a component in the opposite direction of the rotation direction of the first connecting member 21 relative to the rotation direction of the first connecting member 21.

[0201] As shown in FIG. 17 and FIG. 18, when the first swing arm 31 is rotated in the counterclockwise direction, the first shaft body 313 slides along the second sliding groove 213 towards the second surface 202 and the second side surface 204. That is, the first shaft body 313 slides along the second sliding groove 213 from the first position 217 towards the second position 218. That is, the first shaft body 313 moves along the second sliding groove 213 towards the outside of the hinge mechanism 100.

[0202] When the second swing arm 41 is rotated in the counterclockwise direction, the second swing arm 41 is rotated in the counterclockwise direction around the first rotating shaft 17, the first sliding body 411 slides along the fifth sliding groove 214 towards the first side surface 203, and the first sliding column 417 and the second sliding column 418 slide along the first section 316 towards the second section 317, and then slide along the second section 317 towards the second end 319. That is, the first sliding column 417 and the second sliding column 418 slide along the first sliding rail 315 from the first end 318 towards the second end 319. At the same time, the first sliding column 417 rotates around the axial direction of the first sliding column 417, and the second sliding column 418 rotates around the axial direction of the second sliding column 418.

[0203] The second connecting member 22 rotates in the clockwise direction, and drives the third swing arm 32 and the fourth swing arm 42 to rotate in the clockwise direction simultaneously. When the third swing arm 32 rotates in the clockwise direction, the second rotating body 321 slides along the second rotating groove 12 towards the direction of the second side surface 104. At the same time, the third swing arm 32 moves relative to the second connecting member 22 in the direction opposite to the rotating direction of the second connecting member 22. Specifically, the third swing arm 32 can move relative to the second connecting member 22 in the direction opposite to the rotating direction of the second connecting member 22 completely, that is, the third swing arm 32 rotates relative to the second connecting member 22 in the clockwise direction. Alternatively, the third swing arm 32 has a component in the direction opposite to the rotating direction of the second connecting member 22 relative to the rotating direction of the second connecting member 22.

[0204] As shown in FIG. 17 and FIG. 18, when the third swing arm 32 rotates in the counterclockwise direction, the second shaft body 323 slides along the fourth sliding groove 223 towards the direction of the fourth surface 206 and the fourth side surface 208. That is, the second shaft body 323 slides along the fourth sliding groove 223 from the third position 227 towards the fourth position 228. That is, the second shaft body 323 moves along the fourth sliding groove 223 towards the outside of the rotating shaft mechanism 100.

[0205] When the fourth swing arm 42 rotates in the clockwise direction, the fourth swing arm 42 rotates in the clockwise direction around the second rotating shaft 18, and at the same time, the second sliding body 421 slides along the seventh sliding groove 224 towards the direction of the third side surface 207, the third sliding column 427 and the fourth sliding column 428 slide along the third segment 326 towards the direction of the fourth segment 327, and then slide along the fourth segment 327 towards the direction of the fourth end 329. That is, the third sliding column 427 and the fourth sliding column 428 slide along the second sliding rail 325 from the third end 328 towards the fourth end 329. At the same time, the third sliding column 427 rotates around the axis of the third sliding column 427, and the fourth sliding column 428 rotates around the axis of the fourth sliding column 428.

[0206] As shown in FIG. 16, when the rotating shaft mechanism 100 is in the folded state, the first connecting member 21 and the second connecting member 22 are folded relative to each other, the first swing arm 31 and the third swing arm 32 are folded relative to each other, the first shaft body 313 is located at one end of the second sliding groove 213 close to the second surface 202, and the second shaft body 323 is located at one end of the fourth sliding groove 223 close to the fourth surface 206. That is, the first shaft body 313 is located at the second position 218, and the second shaft body 323 is located at the fourth position 228. Meanwhile, when the rotating shaft mechanism 100 is in the folded state, the second swing arm 41 and the fourth swing arm 42 are folded relative to each other. The first sliding column 417 and the second sliding column 418 are located at the second section 317 of the first sliding rail 315 and at the second end 319 of the second section 317, or the first sliding column 417 and the second sliding column 418 are close to the second end 319. The third sliding column 427 and the fourth sliding column 428 are located at the fourth section 327 of the second sliding rail 325 and at the fourth end 329 of the fourth section 327, or the third sliding column 427 and the fourth sliding column 428 are close to the fourth end 329.

[0207] As shown in FIG. 17, the tangent line of the second sliding groove 213 at the second position 218 is parallel or approximately parallel to the width direction of the first connecting member 21. When the rotating shaft mechanism 100 is in the folded state, the direction of the force exerted by the inner wall of the second sliding groove 213 on the first shaft body 313 is parallel or approximately parallel to the Z direction, so that the first shaft body 313 can be prevented from sliding toward the first position 217 when the rotating shaft mechanism 100 falls or is impacted, and the drop resistance of the rotating shaft mechanism 100 and the foldable electronic device 500 can be improved.

[0208] The tangent line of the fourth sliding groove 223 at the fourth position 228 is parallel or approximately parallel to the width direction of the second connecting member 22. When the rotating shaft mechanism 100 is in the folded state, the direction of the force exerted by the inner wall of the fourth sliding groove 223 on the second shaft body 323 is parallel or approximately parallel to the Z direction, so that the second shaft body 323 can be prevented from sliding toward the third position 227 when the rotating shaft mechanism 100 falls or is impacted, and the drop resistance of the rotating shaft mechanism 100 and the foldable electronic device 500 can be further improved.

[0209] For further understanding of this embodiment, please refer to FIG. 19, which is a partially simplified diagram of the rotating shaft mechanism 100 shown in FIG. 7.

[0210] As shown in FIG. 19, the base 10, the first swing arm 31, the first connecting member 21, and the second swing arm 41 can be understood as a four-bar linkage. The first swing arm 31 is rotationally connected with the base 10 to form a first lower pair. The first swing arm 31 is slidingly and rotationally connected with the first connecting member 21 to form a first upper pair. The first connecting member 21 is slidingly connected with the second swing arm 41 to form a second lower pair. The second swing arm 41 is rotationally connected with the base 10 to form a third lower pair. The first swing arm 31 is slidingly and rotationally connected with the second swing arm 41 to form a second upper pair.

[0211] According to the formula of calculating the degree of freedom of a bar: F=3n-2L-1h. Wherein, F is the degree of freedom, n is the number of movable bars, L is the number of lower pairs, and h is the number of higher pairs. In this embodiment, the number of movable bars n is 3, the number of lower pairs L is 3, and the number of higher pairs h is 2. Then, F is 1. That is, the degree of freedom of the four-bar linkage shown in FIG. 19 is 1. That is, the four-bar linkage shown in FIG. 19 has only one movement form. In other words, the movement form of the first swing arm 31, the first connecting piece 21 and the second swing arm 41 during the rotation of the rotation shaft mechanism 100 is determined, and there is only one movement form. This can improve the stability and reliability of the rotation of the rotation shaft mechanism 100. It can be understood that during the rotation of the rotation shaft mechanism 100 from the unfolded state to the folded state, the first shaft body 313 will slide along the second sliding groove 213 from the first position 217 to the second position 218, and at the same time, the first sliding column 417 and the second sliding column 418 will slide along the first sliding rail 315 from the first end 318 to the second end 319.

[0212] Similarly, the base 10, the third swing arm 32, the second connecting piece 22 and the fourth swing arm 42 can also be understood as a four-bar linkage, and the degree of freedom of the four-bar linkage is 1. That is, the movement form of the third swing arm 32, the second connecting piece 22 and the fourth swing arm 42 during the rotation of the rotation shaft mechanism 100 is determined, and there is only one movement form. This can further improve the rotation stability and rotation reliability of the rotation shaft mechanism 100. It can be understood that during the rotation of the rotation shaft mechanism 100 from the unfolded state to the folded state, the second shaft body 323 will slide along the fourth sliding groove 223 from the third position 227 to the fourth position 228, and at the same time, the third sliding column 427 and the fourth sliding column 428 will slide along the second sliding rail 325 from the third end 328 to the fourth end 329.

[0213] Please refer to FIG. 17, during the rotation of the rotation shaft mechanism 100 from the unfolded state to the folded state, the rotation angle of the first connecting piece 21 and the second swing arm 41 is 90 degrees, or approximately 90 degrees, and the rotation angle of the first swing arm 31 is A1. Wherein, the included angle A1 is 90°-100°. That is, during the rotation of the rotation shaft mechanism 100 from the unfolded state to the folded state, the rotation angle of the first swing arm 31 relative to the base 10 is 90°-100°. Exemplarily, the included angle A1 is 93°-95°.

[0214] During the rotation of the pivot mechanism 100 from the unfolded state to the folded state, the second connecting member 22 and the fourth swing arm 42 rotate at an angle of 90 degrees, or approximately 90 degrees, while the third swing arm 32 rotates at an angle of 90° to 100°. That is, during the rotation of the pivot mechanism 100 from the unfolded state to the folded state, the third swing arm 32 rotates at an angle of 90° to 100° relative to the base 10. For example, during the rotation of the pivot mechanism 100 from the unfolded state to the folded state, the third swing arm 32 rotates at an angle of 93° to 95° relative to the base 10.

[0215] In this embodiment, by providing a second sliding groove 213 on the first connecting member 21, the first swing arm 31 is rotatably and slidably connected to the first connecting member 21. At the same time, the first swing arm 31 is rotatably and slidably connected to the second swing arm 41. When the rotating shaft mechanism 100 rotates from the unfolded state to the folded state, the first swing arm 31 rotates relative to the base 10 and also rotates and slides relative to the first connecting member 21. Furthermore, the first swing arm 31 moves relative to the first connecting member 21 in the opposite direction to the rotation direction of the first connecting member 21, thereby reducing the rotation angle of the first swing arm 31 relative to the base 10, that is, reducing the included angle A1.

[0216] To better understand the embodiment shown in FIG17, please also refer to FIG20, which is a cross-sectional structural schematic diagram of a rotating shaft mechanism 100 provided in another embodiment of this application. In FIG20, the dashed lines represent the outline of the first swing arm 31 and the first connecting member 21 when the rotating shaft mechanism 100 is in the unfolded state.

[0217] The embodiment shown in Figure 20 differs from the embodiment shown in Figure 17 in that, in the embodiment shown in Figure 20, the first swing arm 31 is rotatably connected to the first connecting member 21. During the rotation of the rotating shaft mechanism 100 from the unfolded state to the folded state, the first swing arm 31 slides along the first rotating groove 11, and simultaneously rotates around the first shaft 313. During the rotation of the rotating shaft mechanism 100 from the unfolded state to the folded state, the rotation angle of the first connecting member 21 is 90 degrees, or approximately 90 degrees, and the rotation angle of the first swing arm 31 is A2.

[0218] In the embodiment shown in FIG. 17, by rotating and sliding connecting the first swing arm 31 and the first connecting piece 21, the first shaft body 313 slides along the second sliding groove 213 towards the second surface 202 during the rotation of the rotating shaft mechanism 100 from the unfolded state to the folded state, that is, moves from the first position 217 to the second position 218, that is, the first shaft body 313 moves towards the opposite direction of the rotating direction of the first connecting piece 21, in other words, the first shaft body 313 slides towards the outside of the rotating shaft mechanism 100, so that the rotating angle A1 of the first swing arm 31 relative to the base 10 can be reduced. That is, the rotating angle A1 is smaller than A2. In the embodiment shown in FIG. 17, when the rotating shaft mechanism 100 rotates from the unfolded state to the folded state, the first swing arm 31 has a smaller rotating angle relative to the base 10, which can avoid the first swing arm 31 from pressing the display screen 300, thereby improving the display effect of the display screen 300 and prolonging the service life of the display screen 300.

[0219] When the size of the first rotating groove 11 in the embodiment shown in FIG. 17 is consistent with the size of the first rotating groove 11 in the embodiment shown in FIG. 20, the overlap amount of the first swing arm 31 and the base 10 when the rotating shaft mechanism 100 is in the folded state is larger in the embodiment shown in FIG. 17. That is, in the embodiment shown in FIG. 17, by rotating and sliding connecting the first swing arm 31 and the first connecting piece 21, the overlap amount of the first swing arm 31 and the base 10 when the rotating shaft mechanism 100 is in the folded state can be increased, thereby improving the connection stability between the first swing arm 31 and the base 10, so that the first swing arm 31 is not easy to come out of the base 10 when the rotating shaft mechanism 100 falls or is impacted, and the support of the first swing arm 31 to the rotating shaft mechanism 100 can be improved, so that the deformation amount and the movement amount of the base 10 towards the inside of the rotating shaft mechanism 100 are reduced when the rotating shaft mechanism 100 falls or is impacted, thereby improving the anti-falling performance of the rotating shaft mechanism 100.

[0220] At the same time, in the embodiment shown in FIG. 17, by rotating and sliding connecting the first swing arm 31 and the first connecting piece 21 to increase the overlap amount of the first swing arm 31 and the base 10 when the rotating shaft mechanism 100 is in the folded state, the stability of the rotating shaft mechanism 100 during opening and closing can be improved, the guiding property of the first rotating groove 11 to the first swing arm 31 can be improved, and the bending and jamming of the rotating shaft mechanism 100 during opening and closing can be reduced or even avoided, the smoothness of the opening and closing process of the rotating shaft mechanism 100 can be improved, and the user experience can be improved.

[0221] Please continue to refer to FIG. 17 and FIG. 20, when the first swing arm 31 overlaps with the base 10 in the same way as the first swing arm 31 overlaps with the base 10 when the hinge mechanism 100 in the embodiment shown in FIG. 20 is in the folded state, the diameter of the first rotating groove 11 in the embodiment shown in FIG. 17 can be designed to be smaller, so as to reduce the thickness of the base 10, and then the thickness of the hinge mechanism 100 can be reduced, which is conducive to realizing the thinning of the foldable electronic device 500.

[0222] Similarly, as shown in FIG. 17, in the embodiment, the fourth sliding groove 223 is arranged on the second connecting piece 22, so that the third swing arm 32 is rotationally and slidingly connected with the second connecting piece 22, and at the same time, the third swing arm 32 is rotationally and slidingly connected with the fourth swing arm 42, so that when the hinge mechanism 100 rotates from the unfolded state to the folded state, the third swing arm 32 rotates relative to the base 10, and at the same time, the third swing arm 32 rotates and slides relative to the second connecting piece 22, and the third swing arm 32 moves relative to the second connecting piece 22 in the opposite direction of the rotation direction of the second connecting piece 22, so as to reduce the rotation angle of the third swing arm 32 relative to the base 10, and then the third swing arm 32 can avoid pressing the display screen 300 when the hinge mechanism 100 is in the folded state, so as to improve the display effect of the display screen 300 and prolong the service life of the display screen 300.

[0223] At the same time, in the embodiment, the third swing arm 32 is rotationally and slidingly connected with the second connecting piece 22, and the third swing arm 32 is rotationally and slidingly connected with the fourth swing arm 42, so as to reduce the rotation angle of the third swing arm 32 relative to the base 10 during the rotation of the hinge mechanism 100 from the unfolded state to the folded state, which can increase the overlap amount of the third swing arm 32 and the base 10 when the hinge mechanism 100 is in the folded state. When the overlap amount of the third swing arm 32 and the base 10 increases when the hinge mechanism 100 is in the folded state, the third swing arm 32 is less likely to come out of the base 10 when the hinge mechanism 100 falls or is impacted, and the support of the third swing arm 32 to the hinge mechanism 100 can be improved, so that the deformation amount and the movement amount of the base 10 towards the inside of the hinge mechanism 100 are reduced when the hinge mechanism 100 falls or is impacted, and then the anti-falling performance of the hinge mechanism 100 can be improved. At the same time, when the overlap amount of the third swing arm 32 and the base 10 increases when the hinge mechanism 100 is in the folded state, the stability of the hinge mechanism 100 during the opening and closing process can be improved, and the bending and jamming of the hinge mechanism 100 during the opening and closing process can be reduced or even avoided, the smoothness of the opening and closing process of the hinge mechanism 100 is improved, and the user's experience is improved.

[0224] As shown in FIG. 16 and FIG. 17, it can be understood that the rotation angle of the first swing arm 31 relative to the base 10 is different from the rotation angle of the second swing arm 41 relative to the base 10 during the rotation of the rotating shaft mechanism 100. For example, during the rotation of the rotating shaft mechanism 100 from the unfolded state to the folded state, the rotation angle of the first swing arm 31 is greater than or equal to the rotation angle of the second swing arm 41. In the embodiment, by setting the first end 318 and the second end 319 of the first slide rail 315 to be staggered in the X direction along the Z direction, and by allowing the first swing arm 31 to slide relative to the second swing arm 41 in the direction from the first end 318 to the second end 319 during the rotation of the rotating shaft mechanism 100, the rotation angles of the first swing arm 31 and the second swing arm 41 are made different, thereby compensating for the angle difference between the first swing arm 31 and the second swing arm 41 and improving the smoothness and stability of the rotation of the rotating shaft mechanism 100.

[0225] In addition, in the embodiment, by setting the curvature radius of the first section 316 of the first slide rail 315 to be smaller than the curvature radius of the second section 317, the sliding speed of the first slide column 417 and the second slide column 418 along the first section 316 is made smaller than the sliding speed of the first slide column 417 and the second slide column 418 along the second section 317, so that the rotation speed of the rotating shaft mechanism 100 is relatively slow at the initial stage of the rotation from the unfolded state to the folded state, that is, the rotation speed of the rotating shaft mechanism 100 is relatively slow at the starting stage of the rotation from the unfolded state to the folded state. This can avoid pulling the display screen 300, thereby avoiding damage or reverse arching of the display screen 300, and prolonging the service life of the display screen 300, and at the same time, avoiding jamming of the rotating shaft mechanism 100 during the rotation and improving the smoothness of the rotating shaft mechanism 100 during the rotation.

[0226] Meanwhile, in the embodiment, by setting the curvature radius of the second section 317 to be smaller than the curvature radius of the first section 316, the second section 317 plays an accelerating role in the sliding of the first slide column 417 and the second slide column 418 during the rotation of the rotating shaft mechanism 100 from the unfolded state to the folded state, that is, the sliding speed of the first slide column 417 and the second slide column 418 along the second section 317 is greater than the sliding speed of the first slide column 417 and the second slide column 418 along the first section 316, so that the rotation speed of the rotating shaft mechanism 100 is relatively fast at the final stage of the rotation to the folded state, thereby reducing the time of the rotating shaft mechanism 100 from the unfolded state to the folded state and improving the user experience.

[0227] In addition, in the embodiment, the movement track of the first slide post 417 and the second slide post 418 can be limited by extending the first slide rail 315 from the first swing arm 31, the structure is simple, and the production process of the rotating shaft mechanism 100 can be simplified. Meanwhile, in the embodiment, no additional sliding groove is arranged, and the wall thickness for arranging the sliding groove is not increased, so that the thickness of the first swing arm 31 can be reduced, and space saving is achieved.

[0228] Similarly, in the embodiment, the third end 328 and the fourth end 329 of the second slide rail 325 are arranged in the X direction and the Z direction in a staggered manner, and the third swing arm 32 can slide relative to the fourth swing arm 42 along the third end 328 to the fourth end 329 during the rotation of the rotating shaft mechanism 100, so that the rotation angles of the third swing arm 32 and the fourth swing arm 42 are different, and the angle difference between the third swing arm 32 and the fourth swing arm 42 can be compensated, so as to further improve the smoothness and stability of the rotation of the rotating shaft mechanism 100.

[0229] In addition, in the embodiment, the curvature radius of the third segment 326 of the second slide rail 325 is greater than the curvature radius of the fourth segment 327, so that the sliding speed of the third slide post 427 and the fourth slide post 428 along the third segment 326 is less than the sliding speed along the fourth segment 327, so that the initial rotation speed of the rotating shaft mechanism 100 from the unfolded state to the folded state is slow, and damage or reverse arching of the display screen 300 can be further avoided, the service life of the display screen 300 is further prolonged, and the rotating shaft mechanism 100 can be further prevented from being stuck during the rotation, and the smoothness of the rotating shaft mechanism 100 during the rotation is further improved. At the same time, by setting the curvature radius of the third segment 326 of the second slide rail 325 to be greater than the curvature radius of the fourth segment 327, the rotation speed of the rotating shaft mechanism 100 from the unfolded state to the folded state at the end can be increased, so that the time for the rotating shaft mechanism 100 to rotate from the unfolded state to the folded state can be reduced, the user experience is improved, the initial rotation speed of the rotating shaft mechanism 100 from the unfolded state to the folded state can be reduced to avoid pulling the display screen 300, so that damage to the display screen 300 can be avoided, and the service life of the display screen 300 is further prolonged.

[0230] As shown in FIG. 14, FIG. 16-18, when the rotating shaft mechanism 100 rotates from the folding state to the unfolded state, the first connecting piece 21 and the second connecting piece 22 rotate towards the opposite direction. That is, the first connecting piece 21 rotates in the clockwise direction, and the second connecting piece 22 rotates in the counterclockwise direction. When the first connecting piece 21 rotates in the clockwise direction, the first swing arm 31 and the second swing arm 41 are simultaneously driven to rotate in the clockwise direction. When the first swing arm 31 rotates in the clockwise direction, the first rotating body 311 slides towards the first rotating groove 11. At the same time, the first shaft body 313 slides along the second sliding groove 213 from the second position 218 towards the first position 217. When the second swing arm 41 rotates in the clockwise direction, the first sliding body 411 slides along the fifth sliding groove 214 towards the second side surface 204, the first sliding column 417 and the second sliding column 418 slide along the second section 317 from the second end 319 towards the first section 316, and then slide along the first section 316 towards the first end 318. At the same time, the first sliding column 417 rotates around the axis of the first sliding column 417, and the second sliding column 418 rotates around the axis of the second sliding column 418.

[0231] When the second connecting piece 22 rotates in the counterclockwise direction, the third swing arm 32 and the fourth swing arm 42 are simultaneously driven to rotate in the counterclockwise direction. When the third swing arm 32 rotates in the counterclockwise direction, the second rotating body 321 slides towards the second rotating groove 12. At the same time, the second shaft body 323 slides along the fourth sliding groove 223 from the fourth position 228 towards the third position 227. When the fourth swing arm 42 rotates in the counterclockwise direction, the second sliding body 421 slides along the seventh sliding groove 224 towards the fourth side surface 208, the third sliding column 427 and the fourth sliding column 428 slide along the fourth section 327 from the fourth end 329 towards the third section 326, and then slide along the third section 326 towards the third end 328. At the same time, the third sliding column 427 rotates around the axis of the third sliding column 427, and the fourth sliding column 428 rotates around the axis of the fourth sliding column 428.

[0232] In this embodiment, by arranging the first sliding rail 315 on the first swing arm 31, the first sliding column 417 and the second sliding column 418 on the second swing arm 41, and the first sliding column 417 and the second sliding column 418 being capable of sliding and rotating relative to the first swing arm 31 along the first sliding rail 315, the rotating and sliding connection between the first swing arm 31 and the second swing arm 41 is realized, so that the rotating stability of the first swing arm 31 and the second swing arm 41 can be improved, and the rotating stability of the rotating shaft mechanism 100 can be improved.

[0233] In one embodiment, the positions of the first slide post 417 and the second slide post 418 can also be interchanged with the position of the first slide rail 315. That is, the first swing arm 31 is provided with a first slide post and a second slide post. The first slide post has the same or similar structure as the first slide post 417 in the embodiment shown in FIG. 15, and the second slide post has the same or similar structure as the second slide post 418 in the embodiment shown in FIG. 15. In the present embodiment, the first slide post and the second slide post are fixed to the side surface of the first swing arm 31 and face the second swing arm 41. The second swing arm 41 in the present embodiment is provided with a first slide rail. The first slide rail has the same or similar structure as the first slide rail 315 in the embodiment shown in FIG. 13. The first slide post and the second slide post of the first swing arm 31 clamp the first slide rail of the second swing arm 41. When the pivot mechanism 100 rotates, the first slide post and the second slide post slide along the first slide rail and rotate.

[0234] In one embodiment, the positions of the third slide post 427 and the fourth slide post 428 can also be interchanged with the position of the second slide rail 325. That is, the third swing arm 32 is provided with a third slide post and a fourth slide post. The third slide post has the same or similar structure as the third slide post 427 in the embodiment shown in FIG. 15, and the fourth slide post has the same or similar structure as the fourth slide post 428 in the embodiment shown in FIG. 15. In the present embodiment, the third slide post and the fourth slide post are fixed to the side surface of the third swing arm 32 and face the fourth swing arm 42. The fourth swing arm 42 in the present embodiment is provided with a second slide rail. The second slide rail has the same or similar structure as the second slide rail 325 in the embodiment shown in FIG. 13. The third slide post and the fourth slide post of the third swing arm 32 clamp the second slide rail of the fourth swing arm 42. When the pivot mechanism 100 rotates, the third slide post and the fourth slide post slide along the second slide rail and rotate.

[0235] FIG. 21 is a structural schematic view of the first support 51 and the second support 52 in the pivot mechanism 100 shown in FIG. 6.

[0236] The first support 51 and the second support 52 are both in long strip structure. The back surface of the first support 51 is provided with a first sliding groove 511 and a first sliding block 512. The extension direction of the first sliding groove 511 intersects with both the Z direction and the X direction. In the present embodiment, the first sliding groove 511 is in arc structure, and the center of the arc is located on the positive direction side of the Z axis of the first sliding groove 511. In other embodiments, the first sliding groove 511 is in arc structure, and the center of the arc is located on the negative direction side of the Z axis of the first sliding groove 511, or the first sliding groove 511 can also be in straight line shape.

[0237] The first sliding groove 511 is used for rotating and sliding connection with the second swing arm 41. In the embodiment, the first sliding groove 511 is multiple. The multiple first sliding grooves 511 are arranged along the Y direction at intervals. For example, the first sliding groove 511 is three. The three first sliding grooves 511 are arranged along the Y direction at intervals. The three first sliding grooves 511 are respectively connected with the second swing arm 41 of the first rotating structure 3, the second swing arm 41A of the second rotating structure 3A and the second swing arm 41B of the third rotating structure 3B, so as to improve the rotating stability of the first support 51.

[0238] The first sliding block 512 is an arc-shaped sliding block. The shape of the first sliding block 512 matches the shape of the sixth sliding groove 219. The first sliding block 512 is arranged on the back of the first support 51. The first sliding block 512 is used for rotating connection with the first connecting piece 21. In the embodiment, the first sliding block 512 is three. The three first sliding blocks 512 are arranged along the Y direction at intervals. The three first sliding blocks 512 are respectively connected with the first connecting piece 21 of the first rotating structure 3, the first connecting piece 21 of the second rotating structure 3A and the first connecting piece 21 of the third rotating structure 3B, so as to further improve the rotating stability of the first support 51.

[0239] Please combine FIG. 22 and FIG. 23. FIG. 22 is a partial structure schematic diagram of the rotating shaft mechanism 100 shown in FIG. 5. FIG. 23 is a partial structure schematic diagram of the rotating shaft mechanism 100 shown in FIG. 5.

[0240] The first support 51, the first connecting piece 21, 21A and 21B are arranged in the Z direction in layers. The back of the first support 51 faces the first connecting piece 21 and the second swing arm 41. The multiple first sliding grooves 511 are arranged one by one corresponding to the multiple third shaft bodies 419 of the second swing arm 41. Each third shaft body 419 is installed in the corresponding first sliding groove 511. The third shaft body 419 can slide along the first sliding groove 511 and rotate around the axis of the third shaft body 419, so as to realize rotating and sliding connection between the first support 51 and the second swing arm 41. The multiple first sliding blocks 512 are arranged one by one corresponding to the multiple sixth sliding grooves 219 of the first connecting piece 21. Each first sliding block 512 is installed in the corresponding sixth sliding groove 219. The first sliding block 512 can slide along the sixth sliding groove 219 in an arc shape, so as to realize rotating connection between the first support 51 and the first connecting piece 21.

[0241] As shown in FIGS. 21-23, the back surface of the second support 52 is provided with a second sliding groove 521 and a second sliding block 522. The extension direction of the second sliding groove 521 intersects with the Z direction and the X direction. In this embodiment, the second sliding groove 521 is arc-shaped, and the center of the arc is located on the positive direction side of the Z axis of the second sliding groove 521. In other embodiments, the second sliding groove 521 is arc-shaped, and the center of the arc is located on the negative direction side of the Z axis of the second sliding groove 521, or the second sliding groove 521 can also be straight.

[0242] The second sliding groove 521 is used for rotating and sliding connection with the fourth swing arm 42. In this embodiment, the second sliding groove 521 is a plurality of. The plurality of second sliding grooves 521 are arranged at intervals along the Y direction. For example, the second sliding groove 521 is three. The three second sliding grooves 521 are arranged at intervals along the Y direction in sequence. The three second sliding grooves 521 are respectively connected with the fourth swing arm 42 of the second rotating structure 3A, the fourth swing arm 42A of the second rotating structure 3A, and the fourth swing arm 42B of the third rotating structure 3B, so as to improve the rotating stability of the second support 52.

[0243] The second sliding block 522 is an arc-shaped sliding block. Moreover, the shape of the second sliding block 522 matches the shape of the eighth sliding groove 229. The second sliding block 522 is arranged on the back surface of the second support 52. The second sliding block 522 is used for rotating connection with the second connecting piece 22. In this embodiment, the second sliding block 522 is three. The three second sliding blocks 522 are arranged at intervals along the Y direction in sequence. The three second sliding blocks 522 are respectively connected with the second connecting piece 22 of the second rotating structure 3A, the second connecting piece 22 of the second rotating structure 3A, and the second connecting piece 22 of the third rotating structure 3B, so as to further improve the rotating stability of the second support 52.

[0244] The second support 52, the second connecting pieces 22, 22A, 22B are arranged in layers along the Z direction, and the back surface of the second support 52 faces the second connecting pieces 22 and the fourth swing arms 42. The plurality of second sliding grooves 521 are arranged one by one corresponding to the fourth shaft bodies 429 of the plurality of fourth swing arms 42. Each fourth shaft body 429 is installed in the corresponding second sliding groove 521, and the fourth shaft body 429 can slide along the second sliding groove 521 and can rotate around the axis direction of the fourth shaft body 429, so as to realize the rotating and sliding connection between the second support 52 and the fourth swing arm 42. The plurality of second sliding blocks 522 are arranged one by one corresponding to the eighth sliding grooves 229 of the plurality of second connecting pieces 22. Each second sliding block 522 is installed in the corresponding eighth sliding groove 229, and the second sliding block 522 can slide along the eighth sliding groove 229 in an arc shape, so as to realize the rotating connection between the second support 52 and the second connecting piece 22.

[0245] When the rotating shaft mechanism 100 is in the unfolded state, the top surface of the first support 51, the top surface of the second support 52, and the top surface of the base 10 are flush or substantially flush. The display screen 300 is arranged on the same side of the first support 51, the second support 52, and the base 10. When the rotating shaft mechanism 100 is in the unfolded state, the first support 51, the second support 52, and the base 10 jointly support the bendable portion 330 of the display screen 300. In this embodiment, by making the top surface of the first support 51 flush with the top surface of the second support 52 when the rotating shaft mechanism 100 is in the unfolded state, the support performance for the display screen 300 can be improved, and the flatness of the display screen 300 when the foldable electronic device 500 is in the unfolded state can be improved.

[0246] Please refer to FIG. 24 and FIG. 25 together. FIG. 24 is a partial structural schematic diagram of the rotating shaft mechanism 100 in the folded state shown in FIG. 22, and FIG. 25 is a partial structural schematic diagram of the rotating shaft mechanism 100 in the folded state shown in FIG. 23.

[0247] During the process of rotating the rotating shaft mechanism 100 from the unfolded state to the folded state, the first connecting piece 21 and the second connecting piece 22 rotate towards each other, thereby driving the second swing arm 41 and the fourth swing arm 42 to rotate towards each other, driving the first support 51 and the second support 52 to rotate towards each other, and further driving the bendable portion of the display screen 300 to bend. When the first connecting piece 21, the second swing arm 41, and the first support 51 rotate, the third shaft body 419 slides along the first sliding groove 511 towards the base 10, at the same time, the third shaft body 419 rotates around its axial direction, and the first sliding block 512 slides along the sixth sliding groove 219 away from the base 10 in an arc shape. When the second connecting piece 22, the fourth swing arm 42, and the second support 52 rotate, the fourth shaft body 429 slides along the second sliding groove 521 towards the base 10, at the same time, the fourth shaft body 429 rotates around its axial direction, and the second sliding block 522 slides along the eighth sliding groove 229 away from the base 10 in an arc shape.

[0248] As shown in FIG. 24 and FIG. 25, when the rotating shaft mechanism 100 is in the folded state, the first connecting piece 21 and the second connecting piece 22 are parallel and opposite along the X direction. The first support 51 and the second support 52 are opposite along the width direction of the base, and the first support 51 and the second support 52 are arranged at an angle. That is, the angle between the first support 51 and the second support 52 is greater than 0 degrees. Towards the base 10, the distance between the first support 51 and the second support 52 gradually increases, thereby forming a water drop-shaped accommodation space between the first support 51, the second support 52, and the base 10. The bendable portion 350 of the display screen 300 is located in the accommodation space.

[0249] In the embodiment, the first support 51 is rotationally connected with the first connecting piece 21, rotationally and slidably connected with the second swing arm 41, the second support 52 is rotationally connected with the second connecting piece 22, and rotationally and slidably connected with the fourth swing arm 42. When the rotating shaft mechanism 100 rotates, the first support 51 can rotate relative to the first connecting piece 21, and the second support 52 can rotate relative to the second connecting piece 22, so that the angle between the first support 51 and the second support 52 is adjustable, which is beneficial to form a “water drop-shaped” avoiding space when the rotating shaft mechanism 100 is in the folded state, so as to adapt to the bending of the display screen 300, thereby avoiding extrusion on the display screen 300 when the rotating shaft mechanism 100 is in the folded state, prolonging the service life of the display screen 300, and also reducing or avoiding the occurrence of creases on the display screen 300, improving the user experience.

[0250] It should be noted that FIGS. 7-20 only show part of the structure of the rotating shaft mechanism, and the above description is only taken as an example of the first rotating structure 3. The basic structure of each component, the connection relationship between components, the connection relationship between components and components outside the assembly, and the movement principle of the components in the second rotating structure 3A and the third rotating structure 3B of the rotating shaft mechanism can be referred to the related design of FIG. 7.

[0251] Please refer to FIGS. 26-28, FIG. 26 is a partial structure schematic diagram of the rotating shaft mechanism 100 provided by the second embodiment of the application, FIG. 27 is a cross-sectional structure schematic diagram of the rotating shaft mechanism 100 shown in FIG. 26 along the direction D-D, and FIG. 28 is an enlarged structure schematic diagram of the first swing arm 31 in the rotating shaft mechanism 100 shown in FIG. 26.

[0252] The difference between the embodiment and the embodiment shown in FIG. 7 is that in the embodiment, the side of the first swing arm 31 facing the second swing arm 41 is provided with a first sliding groove 37. The first sliding groove 37 is a strip-shaped groove, and the second swing arm 41 is provided with a first sliding shaft 416 matched with the first sliding groove 37. The first sliding shaft 416 is installed in the first sliding groove 37, and the first sliding shaft 416 can slide and rotate relative to the first swing arm 31 along the first sliding groove 37.

[0253] When the rotating shaft mechanism 100 is in the unfolded state, the first end 373 and the second end 374 of the first sliding groove 37 are arranged in a staggered manner along the X direction and the Z direction. That is, the connecting line of the first end 373 and the second end 374 intersects with the X direction and the Z direction. Among them, the second end 374 is located in the X-axis negative direction and the Z-axis positive direction of the first end 373. That is, the second end 374 is located on the side of the first end 373 facing the base 10, and the second end 374 is located on the side of the first end 373 facing the display screen 300.

[0254] In the embodiment, the first sliding groove 37 is an arc-shaped sliding groove. The first sliding groove 37 comprises a first section 371 and a second section 372. The first section 371 and the second section 372 are connected along the extension direction of the first sliding groove 37. The first section 371 is located at the side of the second section 372 close to the first shaft body 313. The first end 373 is located at the end of the first section 371 away from the second section 372, and the second end 374 is located at the end of the second section 372 away from the first section 371. In the embodiment, the center of the first sliding groove 37 is located at the side of the first sliding groove 37 in the positive direction of the Z axis, that is, the center of the first sliding groove 37 is located at the side of the first sliding groove 37 facing the display screen 300. The curvature radius of the first section 371 is greater than the curvature radius of the second section 372. That is, the bending degree of the first section 371 is smaller than the bending degree of the second section 372. For example, the first section 371 is substantially linear, and the second section 372 is arc-shaped. The first section 371 is close to the first shaft body 313, and the second section 372 extends in an arc shape toward the top surface direction of the first swinging body 312.

[0255] In an embodiment, the first sliding groove 37 is an arc-shaped groove, and the center of the first sliding groove 37 is located at the side of the first sliding groove 37 in the negative direction of the Z axis, that is, the second section 372 extends in an arc shape toward the bottom surface direction of the first swinging body 312, that is, extends toward the negative direction of the Z axis. Alternatively, the first sliding groove 37 can also be linear. That is, the first section 371 and the second section 372 are both linear and connected in a straight line. The shape of the first sliding groove 37 is not specifically limited here as long as the first swinging arm 31 and the second swinging arm 41 can be rotationally and slidingly connected.

[0256] In the embodiment, the first sliding shaft 416 faces the first swinging arm 31, and the extension direction of the first sliding shaft 416 is parallel or substantially parallel to the Y direction. The second swinging arm 41 and the first swinging arm 31 are sequentially arranged along the Y direction. The first sliding shaft 416 is installed in the first sliding groove 37 and can slide along the first sliding groove 37, and at the same time, the first sliding shaft 416 can also rotate around the axial direction of the first sliding shaft 416.

[0257] The third swinging arm 32 and the first swinging arm 31 are mirror-symmetrically structured with each other. The third swinging arm 32 is provided with a third sliding groove 38 on the side facing the fourth swinging arm 42. When the rotating shaft mechanism 100 is in the unfolded state, the third end 383 and the fourth end 364 of the third sliding groove 38 are arranged in a staggered manner along the X direction and the Z direction. That is, the connecting line of the third end 383 and the fourth end 384 intersects with the X direction and the Z direction. The fourth end 384 is located in the X-axis positive direction and the Z-axis positive direction of the third end 383. That is, the fourth end 384 is located on the side of the third end 383 facing the base 10, and the fourth end 384 is located on the side of the third end 383 facing the display screen 300.

[0258] In the embodiment, the third sliding groove 38 is in an arc-shaped sliding groove structure. The third sliding groove 38 comprises a third section 381 and a fourth section 382. The third section 381 and the fourth section 382 are connected along the extension direction of the third sliding groove 38. The third section 381 is located at the side of the fourth section 382 close to the second shaft body 323. The third end 383 is located at the end of the third section 381 away from the fourth section 382, and the fourth end 384 is located at the end of the fourth section 382 away from the third section 381. In the embodiment, the center of the third sliding groove 38 is located at the side of the third sliding groove 38 in the positive direction of the Z axis, that is, the center of the third sliding groove 38 is located at the side of the third sliding groove 38 facing the display screen 300. The curvature radius of the third section 381 is greater than the curvature radius of the fourth section 382. That is, the bending degree of the third section 381 is smaller than the bending degree of the fourth section 382. For example, the third section 381 is approximately in a straight line shape, and the fourth section 382 is in an arc shape. Alternatively, the third section 381 and the fourth section 382 can both be in an arc shape. The third section 381 is close to the second shaft body 323, and the fourth section 382 extends in an arc shape toward the top surface direction of the second swing body 322.

[0259] In an embodiment, the third sliding groove 38 is in an arc-shaped sliding groove structure, and the center of the third sliding groove 38 is located at the side of the third sliding groove 38 in the negative direction of the Z axis, that is, the second section 372 extends in an arc shape toward the bottom surface direction of the first swing body 312, that is, extends toward the negative direction of the Z axis. Alternatively, the third sliding groove 38 can also be in a straight line shape. That is, the third section 381 and the fourth section 382 are both in a straight line shape and are connected in a straight line. The shape of the third sliding groove 38 is not specifically limited here, as long as the first swing arm 31 and the second swing arm 41 can be rotationally and slidingly connected.

[0260] The fourth swing arm 42 is provided with a second sliding shaft 426. The second sliding shaft 426 faces the third swing arm 32, and the extension direction of the second sliding shaft 426 is parallel or approximately parallel to the Y direction. The fourth swing arm 42 and the third swing arm 32 are sequentially arranged along the Y direction, the second sliding shaft 426 is installed in the third sliding groove 38 and can slide along the third sliding groove 38, and the second sliding shaft 426 can also rotate about the axial direction of the second sliding shaft 426.

[0261] Please refer to FIGS. 14, 26 and 27. When the rotation shaft mechanism 100 is in the unfolded state, the first connecting piece 21 and the second connecting piece 22 are relatively unfolded, the first swing arm 31 and the third swing arm 32 are relatively unfolded, and the second swing arm 41 and the fourth swing arm 42 are relatively unfolded. The first shaft body 313 of the first swing arm 31 is located at the first position 217 of the second sliding groove 213, and the fourth shaft body 429 of the third swing arm 32 is located at the third position 227 of the fourth sliding groove 223. The first sliding shaft 416 is located in the first section 371 of the first sliding groove 37 and at the first end 373 of the first section 371. The second sliding shaft 426 is located in the third section 381 of the third sliding groove 38 and at the third end 383 of the third section 381.

[0262] Please refer to Fig. 29, which is a sectional structure diagram of the hinge mechanism 100 in the folded state.

[0263] When the hinge mechanism 100 is rotated from the unfolded state to the folded state, the first connecting member 21 is rotated in the counterclockwise direction, driving the first swing arm 31 and the second swing arm 41 to rotate in the counterclockwise direction simultaneously. When the first swing arm 31 is rotated in the counterclockwise direction, the first rotating body 311 is rotated along the first rotating groove 11, and the first shaft body 313 is slid along the second sliding groove 213 from the first position 217 to the second position 218. When the second swing arm 41 is rotated in the counterclockwise direction, the first sliding body 411 is slid along the fifth sliding groove 214 to the first side surface 203, and the first sliding shaft 416 is slid along the first section 371 to the second section 372, and then slid along the second section 372 to the second end 374, while the first sliding shaft 416 is rotated around the axis of the first sliding shaft 416.

[0264] The second connecting member 22 is rotated in the clockwise direction, driving the third swing arm 32 and the fourth swing arm 42 to rotate in the clockwise direction simultaneously. When the third swing arm 32 is rotated in the clockwise direction, the second rotating body 321 is rotated along the second rotating groove 12, and the second shaft body 323 is slid along the fourth sliding groove 223 from the third position 227 to the fourth position 228. When the fourth swing arm 42 is rotated in the clockwise direction, the second sliding body 421 is slid along the seventh sliding groove 224 to the third side surface 207, and the second sliding shaft 426 is slid along the third section 381 to the fourth section 382, and then slid along the fourth section 382 to the fourth end 384, while the second sliding shaft 426 is rotated around the axis of the second sliding shaft 426, so that the hinge mechanism 100 is in the folded state.

[0265] As shown in Fig. 29, when the hinge mechanism 100 is in the folded state, the first connecting member 21 and the second connecting member 22 are folded relative to each other, the first swing arm 31 and the third swing arm 32 are folded relative to each other, and the second swing arm 41 and the fourth swing arm 42 are folded relative to each other. The first shaft body 313 is located at the second position 218, and the second shaft body 323 is located at the fourth position 228. The first sliding shaft 416 is located in the second section 372 of the first sliding groove 37, and at the second end 374 of the second section 372. The second sliding shaft 426 is located in the fourth section 382 of the third sliding groove 38, and at the fourth end 384 of the fourth section 382.

[0266] When the rotating shaft mechanism 100 rotates from the folded state to the unfolded state, the first connecting piece 21 rotates in the clockwise direction, driving the first swing arm 31 and the second swing arm 41 to rotate in the clockwise direction at the same time, so that the first shaft body 313 slides along the second sliding groove 213 from the second position 218 to the first position 217, the first sliding body 411 slides along the fifth sliding groove 214 to the second side 204, the first sliding shaft 416 slides along the second section 372 to the first section 371, and then slides along the first section 371 to the first end 373, at the same time, the first sliding shaft 416 rotates around the axis of the first sliding shaft 416.

[0267] The second connecting piece 22 rotates in the counterclockwise direction, driving the third swing arm 32 and the fourth swing arm 42 to rotate in the counterclockwise direction at the same time, so that the second shaft body 323 slides along the fourth sliding groove 223 from the fourth position 228 to the third position 227, the second sliding body 421 slides along the seventh sliding groove 224 to the fourth side 208, the second sliding shaft 426 slides along the fourth section 342 to the third section 381, and then slides along the third section 381 to the third end 383, at the same time, the second sliding shaft 426 rotates around the axis of the second sliding shaft 426, so that the rotating shaft mechanism 100 rotates to the unfolded state.

[0268] In this embodiment, by rotating and sliding connecting the first swing arm 31 and the first connecting piece 21 through the second sliding groove 213 and the first shaft body 313, and rotating and sliding connecting the first swing arm 31 and the second swing arm 41 through the first sliding groove 37 and the first sliding shaft 416, the first swing arm 31 can rotate relative to the first connecting piece 21 to the outside of the rotating shaft mechanism 100 during the rotating process of the rotating shaft mechanism 100 from the unfolded state to the folded state, so that the rotating angle of the first swing arm 31 relative to the base 10 during the rotating process of the rotating shaft mechanism 100 from the unfolded state to the folded state can be reduced, thereby avoiding the first swing arm 31 from pressing the display screen 300 when the rotating shaft mechanism 100 is in the folded state, prolonging the service life of the display screen 300, at the same time, the overlapping amount of the first swing arm 31 and the base 10 when the rotating shaft mechanism 100 is in the folded state can be increased, so that the connection stability between the first swing arm 31 and the base 10 can be improved, and the anti-falling performance of the rotating shaft mechanism 100 can be improved.

[0269] In this embodiment, by setting the first sliding groove 37 on the first swing arm 31 and setting the first sliding shaft 416 on the second swing arm 41, the rotating and sliding connection of the first swing arm 31 and the second swing arm 41 can be realized, and the first sliding shaft 416 can be limited in the first sliding groove 37, so that the stability of the first sliding shaft 416 sliding along the first sliding groove 37 can be improved, the rotating stability of the first swing arm 31 and the second swing arm 41 can be improved, and the rotating stability of the rotating shaft mechanism 100 can be improved.

[0270] In the embodiment, by setting the radius of curvature of the second section 372 to be smaller than the radius of curvature of the first section 371, the rotation speed of the rotation shaft mechanism 100 at the initial stage of rotating to the folded state can be reduced to avoid pulling the display screen 300, so as to avoid damaging the display screen 300, thereby prolonging the service life of the display screen 300, and at the same time, the rotation speed of the rotation shaft mechanism 100 at the final stage of rotating from the unfolded state to the folded state can be increased, so as to reduce the time of rotating the rotation shaft mechanism 100 from the unfolded state to the folded state, and improve the user experience.

[0271] In the embodiment, by rotating and sliding connecting the third swing arm 32 and the second connecting piece 22 through the fourth sliding groove 223 and the second shaft body 323, and rotating and sliding connecting the third swing arm 32 and the fourth swing arm 42 through the third sliding groove 38 and the second sliding shaft 426, the third swing arm 32 can rotate relative to the second connecting piece 22 outward of the rotation shaft mechanism 100 during the rotation of the rotation shaft mechanism 100 from the unfolded state to the folded state, so as to reduce the rotation angle of the third swing arm 32 relative to the base 10 during the rotation of the rotation shaft mechanism 100 from the unfolded state to the folded state, thereby avoiding the third swing arm 32 pressing the display screen 300 when the rotation shaft mechanism 100 is in the folded state, prolonging the service life of the display screen 300, and at the same time, the overlapping amount of the third swing arm 32 and the base 10 when the rotation shaft mechanism 100 is in the folded state can be increased, so as to improve the connection stability between the third swing arm 32 and the base 10, and further improve the anti-falling performance of the rotation shaft mechanism 100.

[0272] Meanwhile, in the embodiment, by setting the third sliding groove 38 on the third swing arm 32 and the second sliding shaft 426 on the fourth swing arm 42, the rotating and sliding connection of the third swing arm 32 and the fourth swing arm 42 can be realized, and the second sliding shaft 426 can be limited in the third sliding groove 38, so as to improve the stability of the second sliding shaft 426 sliding along the third sliding groove 38, thereby improving the rotation stability of the third swing arm 32 and the fourth swing arm 42, and further improving the rotation stability of the rotation shaft mechanism 100.

[0273] In the embodiment, by setting the radius of curvature of the second section 372 to be smaller than the radius of curvature of the first section 371, the rotation speed of the rotation shaft mechanism 100 at the initial stage of rotating to the folded state can be reduced to avoid pulling the display screen 300, so as to avoid damaging the display screen 300, thereby prolonging the service life of the display screen 300, and at the same time, the rotation speed of the rotation shaft mechanism 100 at the final stage of rotating from the unfolded state to the folded state can be increased, so as to reduce the time of rotating the rotation shaft mechanism 100 from the unfolded state to the folded state, and improve the user experience.

[0274] In an embodiment, the positions of the first sliding shaft 416 and the first sliding groove 37 can also be interchanged. That is, the first swing arm 31 is provided with a first sliding shaft. The structure of the first sliding shaft is the same as or similar to that of the first sliding shaft 416 in the embodiment shown in FIG. 32. The first sliding shaft is fixed to the side surface of the first swing arm 31 and faces the second swing arm 41. The second swing arm 41 is provided with a first sliding rail. The structure of the first sliding rail is the same as or similar to that of the first sliding groove 37 in the embodiment shown in FIG. 32. The first sliding shaft of the first swing arm 31 is installed in the first sliding rail of the second swing arm 41. When the rotating shaft mechanism 100 rotates, the first sliding shaft slides along the first sliding rail and rotates.

[0275] In an embodiment, the positions of the second sliding shaft and the third sliding groove 38 can also be interchanged. That is, the third swing arm 32 is provided with a second sliding shaft. The structure of the second sliding shaft is the same as or similar to that of the second sliding shaft 426 in the embodiment shown in FIG. 32. The second sliding shaft is fixed to the side surface of the third swing arm 32 and faces the fourth swing arm 42. The fourth swing arm 42 is provided with a third sliding groove 38. The structure of the second sliding rail is the same as or similar to that of the third sliding groove 38 in the embodiment shown in FIG. 32. The second sliding shaft of the third swing arm 32 is installed in the second sliding rail of the fourth swing arm 42. When the rotating shaft mechanism 100 rotates, the second sliding shaft slides along the second sliding rail and rotates.

[0276] Please refer to FIG. 30 and FIG. 31. FIG. 30 is a sectional structure schematic diagram of the rotating shaft mechanism 100 according to the third embodiment of the present application, and FIG. 31 is an enlarged structure schematic diagram of the first swing arm 31 in the rotating shaft mechanism 100 shown in FIG. 30.

[0277] The difference between the present embodiment and the embodiment shown in FIG. 16 is that:

[0278] In the present embodiment, the first sliding rail 315 of the first swing arm 31 comprises a first surface 33 and a second surface 34 arranged oppositely along the thickness direction of the first sliding rail 315, and the second surface 34 is located on the side of the first surface 33 facing the display screen 300. That is, the second surface 34 is located on the positive direction side of the Z axis of the first surface 33. The first surface 33 comprises a first stop surface 331, a first guide surface 332 and a first sliding surface 333 connected in sequence along the extension direction of the first sliding rail 315. The first stop surface 331 is a plane or substantially a plane. The first stop surface 331 is arranged on the second section of the first sliding rail 315, and the first sliding surface 333 is arranged on the first section. The first stop surface 331 and the first sliding surface 333 are arranged at an angle, and the angle between the first stop surface 331 and the first sliding surface 333 is greater than or equal to 80 degrees and less than 90 degrees. The first guide surface 332 is an arc surface to achieve smooth connection between the first stop surface 331 and the first sliding surface 333.

[0279] The third swing arm 32 is mirror-symmetrical with the first swing arm 31. The second slide rail 325 of the third swing arm 32 comprises a third face 35 and a fourth face 36 arranged oppositely along the thickness direction of the second slide rail 325, and the fourth face 36 is located on the side of the third face 35 facing the display screen 300. That is, the fourth face 36 is located on the side of the third face 35 in the positive direction of the Z axis. The third face 35 comprises a third stop face 351, a second guide face 352 and a third slide face 353 connected in sequence along the extension direction of the second slide rail 325. The third stop face 351 is a plane or substantially a plane. The third stop face 351 is arranged on the fourth section of the second slide rail 325, and the third slide face 353 is arranged on the third section 326. The third stop face 351 and the third slide face 353 are arranged at an included angle, and the included angle between the third stop face 351 and the third slide face 353 is greater than or equal to 80 degrees and less than 90 degrees. The second guide face 352 is an arc face to achieve smooth connection between the third stop face 351 and the third slide face 353.

[0280] Please refer to FIG. 32, which is an enlarged structural schematic view of the second swing arm 41 in the pivot mechanism 100 shown in FIG. 30.

[0281] In the embodiment, the first slide column 417 is cylindrical, and the second slide column 418 is of a special-shaped structure. The second slide column 418 is located on the side of the first slide column 417 close to the base 10. Specifically, the second slide column 418 comprises a first arc face 4181 and a second stop face 4182 connected to each other. The second stop face 4182 is a plane or substantially a plane, and the first arc face 4181 is a curved face. Both the first arc face 4181 and the second stop face 4182 face the first slide column 417.

[0282] The third slide column 427 is cylindrical and mirror-symmetrical with the first slide column 417. The fourth slide column 428 is mirror-symmetrical with the second slide column 418. The fourth slide column 428 is located on the side of the third slide column 427 close to the base 10. Specifically, the fourth slide column 428 comprises a second arc face 4281 and a fourth stop face 4282 connected to each other. The fourth stop face 4282 is a plane or substantially a plane, and the second arc face 4281 is a curved face. Both the second arc face 4281 and the fourth stop face 4282 face the third slide column 427.

[0283] As shown in Fig. 25, when the rotating shaft mechanism 100 is in the unfolded state, the first slide post 417 and the second slide post 418 hold the first slide rail 315 and are located at the first section 316 of the first slide rail 315. The surface of the first slide post 417 is in contact with the second face 34, and the first curved surface 4181 of the second slide post 418 is in contact with the first sliding face 333 of the first slide rail 315. The third slide post 427 and the fourth slide post 428 hold the second slide rail 325 and are located at the third section 326 of the second slide rail 325. The surface of the third slide post 427 is in contact with the fourth face 36, and the second curved surface 4281 of the fourth slide post 428 is in contact with the third sliding face 353 of the second slide rail 325.

[0284] Fig. 33 is a sectional structure diagram of the rotating shaft mechanism 100 in the folded state shown in Fig. 30.

[0285] During the process of rotating the rotating shaft mechanism 100 from the unfolded state to the folded state, the first swing arm 31 and the third swing arm 32 rotate towards each other, and the second swing arm 41 and the fourth swing arm 42 rotate towards each other. The first slide post 417 and the second slide post 418 slide along the first slide rail 315 from the first section 316 towards the second section 317, and then slide along the second section 317. Specifically, the first slide post 417 slides along the second face 34 from the first section 316 to the second section 317, and then to the second end 319 of the second section 317. The first curved surface 4181 of the second slide post 418 slides along the first sliding face 333 towards the first guide face 332, and then slides along the first guide face 332, and then disengages from the first slide rail 315.

[0286] The third slide post 427 and the fourth slide post 428 slide along the second slide rail 325 from the third section 326 towards the fourth section 327, and then slide along the fourth section 327. Specifically, the third slide post 427 slides along the fourth face 36 from the third section 326 to the fourth section 327, and then to the fourth end 329 of the fourth section 327. The second curved surface 4281 of the fourth slide post 428 slides along the third sliding face 353 towards the second guide face 352, and then slides along the second guide face 352, and then disengages from the second slide rail 325.

[0287] As shown in FIG. 33, when the rotating shaft mechanism 100 is in the folded state, the second slide post 418 is located at the side of the first slide rail 315 close to the base 10, and the second stop surface 4182 is arranged opposite to the first stop surface 331 along the thickness direction of the base 10, that is, along the Z direction. The first stop surface 331 plays a stop role on the second stop surface 4182. That is, the first slide rail 315 plays a stop role on the second slide post 418. That is, the first swing arm 31 plays a supporting and stopping role on the second swing arm 41. When the rotating shaft mechanism 100 falls or is impacted from the side of the base 10, the second swing arm 41 slides along the fifth slide groove 214 towards the direction away from the base 10, the second stop surface 4182 moves towards the first stop surface 331, and forms a surface-to-surface contact with the first stop surface 331. At this time, the first slide rail 315 can prevent the second swing arm 41 from continuing to slide along the fifth slide groove 214 towards the direction away from the base 10, so as to avoid extrusion on the display screen 300, thereby improving the anti-falling performance of the foldable electronic device 500 and prolonging the service life of the display screen 300.

[0288] When the rotating shaft mechanism 100 is in the folded state, the fourth slide post 428 is located at the side of the second slide rail 325 close to the base 10, and the fourth stop surface 4282 is arranged opposite to the third stop surface 351. In this embodiment, by arranging the third stop surface 351 on the second slide rail 325 and the fourth stop surface 4282 on the fourth slide post 428, and arranging the third stop surface 351 opposite to the fourth stop surface 4282 along the thickness direction of the base when the rotating shaft mechanism 100 is in the folded state, the second slide rail 325 plays a stop role on the fourth slide post 428. That is, the third swing arm plays a supporting and stopping role on the fourth swing arm 42. In this way, the fourth swing arm 42 can be prevented from sliding along the seventh slide groove 224 towards the direction away from the base 10 when the rotating shaft mechanism 100 is impacted or falls, so as to further avoid extrusion on the display screen 300, thereby further improving the anti-falling performance of the foldable electronic device 500 and further prolonging the service life of the display screen 300.

[0289] In this embodiment, by arranging the first arc surface 4181 and the second stop surface 4182 on the second slide post 418, the second slide post 418 can slide along the first slide rail 315 while the stop between the second slide post 418 and the first slide rail 315 when the rotating shaft mechanism 100 is in the folded state is realized, so as to simplify the structure of the rotating shaft mechanism 100. Similarly, in this embodiment, by arranging the second arc surface 4281 and the fourth stop surface 4282 on the fourth slide post 428, the fourth slide post 428 can slide along the second slide rail 325 while the stop between the fourth slide post 428 and the second slide rail 325 when the rotating shaft mechanism 100 is in the folded state is realized, so as to simplify the structure of the rotating shaft mechanism 100.

[0290] As shown in FIG. 30, in the embodiment, the second stop surface 4182 is spaced apart from the first stop surface 331. The spacing between the second stop surface 4182 and the first stop surface 331 is 0.1mm-0.5mm. The fourth stop surface 4282 is spaced apart from the third stop surface 351. The spacing between the fourth stop surface 4282 and the third stop surface 351 is 0.1mm-0.5mm.

[0291] During the rotation of the rotation shaft mechanism 100 from the folded state to the unfolded state, the first swing arm 31 and the third swing arm 32 rotate towards each other, and the second swing arm 41 and the fourth swing arm 42 rotate towards each other. The first slide post 417 slides along the second surface 34 from the second section 317 to the first section 316, and then slides along the first section 316 to the first end 318. The second slide post 418 first moves towards the first slide rail 315, then the first arc surface 4181 contacts the first guide surface 332, and then the first arc surface 4181 slides along the first guide surface 332 to the first sliding surface 333 and slides along the first sliding surface 333. The third slide post 427 slides along the fourth surface 36 from the fourth section 327 to the third section 326, and then slides along the third section 326 to the third end 328. The fourth slide post 428 first moves towards the second slide rail 325, then the second arc surface 4281 contacts the second guide surface 352, and then the second arc surface 4281 slides along the second guide surface 352 to the third sliding surface 353 and slides along the third sliding surface 353, so that the rotation shaft mechanism 100 rotates to the unfolded state.

[0292] In the embodiment, by spacing the first stop surface 331 and the second stop surface 4182 apart, a small gap is formed between the second slide post 418 and the first slide rail 315, so that when the rotation shaft mechanism 100 rotates to the folded state, the second slide post 418 can smoothly slide from the second section 317 to the first section 316, thereby improving the smoothness of the rotation shaft mechanism 100 during rotation. Similarly, in the embodiment, by spacing the third stop surface 351 and the fourth stop surface 4282 apart, a small gap is formed between the fourth slide post 428 and the second slide rail 325, so that when the rotation shaft mechanism 100 rotates to the folded state, the fourth slide post 428 can smoothly slide from the fourth section 327 to the third section 326, thereby further improving the smoothness of the rotation shaft mechanism 100 during rotation.

[0293] Please refer to FIG. 34, which is a partial exploded structural schematic view of the rotation shaft mechanism 100 according to the third embodiment of the present application.

[0294] The second rotating structure 3A is the same as the first rotating structure 3 in the embodiment, and the third rotating structure 3B is a mirror image of the first rotating structure 3. The first connecting members 21, 21A and 21B are parallel and spaced along the Y direction. The first connecting member 21A is provided with a second sliding groove 213A, and the first connecting member 21B is provided with a second sliding groove 213B. The second sliding groove 213 along the Y direction is completely coincident with the second sliding groove 213A and the second sliding groove 213B. The first swing arms 31, 31A and 31B are parallel and spaced along the Y direction. The first swing arm 31A includes a first shaft body 313A, and the first swing arm 31B includes a first shaft body 313B. The axis of the first shaft body 313 is coincident with the axes of the first shaft body 313A and the first shaft body 313B. That is, the first shaft body 313 along the Y direction is completely coincident with the first shaft body 313A and the first shaft body 313B. The first sliding rail 315 of the first swing arm 31 along the Y direction is completely coincident with the first sliding rail of the first swing arm 31A and the first sliding rail of the first swing arm 31B. In this way, the design and manufacturing difficulty of the rotating shaft mechanism 100 can be simplified, the production cost is reduced, and the multiple first swing arms can be synchronously rotated with consistent rotating speed and rotating angle, the multiple second swing arms can be synchronously rotated with consistent rotating speed and rotating angle, and the multiple first connecting members can be synchronously rotated with consistent rotating angle, so as to ensure the consistency and smoothness of the rotating shaft mechanism 100.

[0295] In the embodiment, the second connecting members 22, 22A and 22B are parallel and spaced along the Y direction. The fourth sliding groove 223 of the second connecting member 22 along the Y direction is completely coincident with the fourth sliding grooves of the second connecting members 22A and 22B. The third swing arms 32, 32A and 32B are parallel and spaced along the Y direction. The second shaft body 323 of the third swing arm 32, the second shaft body of the third swing arm 32A and the second shaft body of the third swing arm 32B are coincident in axis. That is, the second shaft body 323 of the third swing arm 32 along the Y direction is completely coincident with the second shaft body of the third swing arm 32A and the second shaft body of the third swing arm 32B. The second sliding rail 325 of the third swing arm 32 along the Y direction is completely coincident with the second sliding rail of the third swing arm 32A and the second sliding rail of the third swing arm 32B. In this way, the design and manufacturing difficulty of the rotating shaft mechanism 100 can be further simplified, the production cost is reduced, and the multiple third swing arms can be synchronously rotated with consistent rotating speed and rotating angle, the multiple fourth swing arms can be synchronously rotated with consistent rotating speed and rotating angle, and the multiple second connecting members can be synchronously rotated with consistent rotating angle, so as to further improve the consistency and smoothness of the rotating shaft mechanism 100.

[0296] Please refer to FIGS. 35-37. FIG. 35 is an exploded structural schematic view of the rotating shaft mechanism 100 according to the fourth embodiment of the present application. FIG. 36 is a cross-sectional structural schematic view of the rotating shaft mechanism 100 according to the fourth embodiment of the present application. FIG. 37 is another cross-sectional structural schematic view of the rotating shaft mechanism 100 according to the fourth embodiment of the present application.

[0297] The difference between the present embodiment and the embodiment shown in FIG. 34 is that, in the present embodiment, the second sliding groove of at least two of the first connecting members is arranged in a staggered manner along the thickness direction of the first connecting member, i.e., along the Z direction, and the first shaft body of at least two of the first swing arms is arranged in a staggered manner along the Z direction.

[0298] For example, the second sliding groove 213 of the first connecting member 21 is arranged in a staggered manner along the Z direction with the second sliding grooves of the first connecting members 21A and 21B, and is located on the positive direction side of the Z axis of the second sliding grooves of the first connecting members 21A and 21B. The orthogonal projection of the second sliding groove 213 of the first connecting member 21 along the Y direction can be arranged in a completely staggered manner or a partially staggered manner along the Z direction with the second sliding grooves of the first connecting members 21A and 21B. Correspondingly, the first shaft body 313 of the first swing arm 31 is arranged in a partially staggered manner or a completely staggered manner along the Z direction with the first shaft bodies of the first swing arms 31A and 31B, and is located on the positive direction side of the Z axis of the first shaft bodies of the first swing arms 31A and 31B. That is, the orthogonal projection of the first shaft body 313 of the first swing arm 31 along the Y direction can be arranged in a completely staggered manner or a partially staggered manner along the Z direction with the first shaft bodies of the first swing arms 31A and 31B.

[0299] It can be understood that the first rotating structure 3 in the present embodiment can be obtained by translating the second sliding groove 213 and the first shaft body 313 in the first rotating structure 3 in the embodiment shown in FIG. 34 towards the positive direction of the Z axis, so as to form an avoiding space 4 on the first connecting member 21. The avoiding space 4 is located on the negative direction side of the Z axis of the second sliding groove 213, and can be used to avoid other elements in the foldable electronic device 500, so as to fully utilize the space in the foldable electronic device 500. For example, when the foldable electronic device 500 is provided with an outer screen, the avoiding space 4 is used to avoid the FPC device of the screen. Alternatively, the avoiding space 4 is used to avoid the battery cover, the audio device, etc. Alternatively, the avoiding space 4 is used to mount a grounding device such as a spring, and the grounding device is electrically connected to the first connecting member 21 and the first housing 210 of the foldable electronic device 500, so as to realize the grounding of the first housing 210.

[0300] It should be noted that when the position and shape of the second sliding groove 213 change, the rotation speed and rotation angle of the first swing arm 31 can be adjusted by adjusting the shape and position of the first sliding rail 315, and the positions of the first sliding column 417 and the second sliding column 418, so that the first swing arm 31 in the first rotating structure 3 is simultaneously rotated to the folded state or the unfolded state with the first swing arm 31A in the second rotating structure 3A and the first swing arm 31B in the third rotating structure 3B, thereby ensuring the consistency and smoothness of the rotation of the rotating shaft mechanism 100. For example, as shown in FIG. 37, in the present embodiment, the positions of the first end 318 and the second end 319 of the first sliding rail 315 do not change, and the bending degree is smaller. That is, the first end 318 of the first sliding rail 315 in the first swing arm 31 coincides with the first end of the first sliding rail in the first swing arm 31A and the first end of the first sliding rail in the first swing arm 31B in the Y direction projection, and the second end 319 of the first sliding rail 315 in the first swing arm 31 coincides with the second end of the first sliding rail in the first swing arm 31A and the second end of the first sliding rail in the first swing arm 31B in the Y direction projection. The bending degree of the first sliding rail 315 is smaller than the bending degree of the first swing arm 31A, 31B. That is, the first sliding rail 315 is more gentle. Moreover, the bending degree of the first sliding rail 315 is smaller than the bending degree of the second sliding rail 325.

[0301] In other embodiments, the second sliding groove of the first connecting piece 21A is at least partially misaligned with the second sliding groove of the first connecting piece 21, 21B in the Z direction and is located on the positive direction side of the Z axis of the second sliding groove of the first connecting piece 21, 21B, thereby forming a avoiding space in the first connecting piece 21A to avoid other elements in the foldable electronic device. Correspondingly, the first shaft body of the first swing arm 31A is partially misaligned or completely misaligned with the first shaft body of the first swing arm 31, 31B in the Z direction and is located on the positive direction side of the Z axis of the first shaft body of the first swing arm 31, 31B.

[0302] That is, the rotating shaft mechanism 100 provided by the present embodiment can adjust the position or shape of any one or more second sliding grooves and first shaft bodies in the plurality of rotating structures as needed, and adjust the position or shape of the corresponding first sliding rail, first sliding column and second sliding column, so that the required avoiding space can be formed in the first connecting piece while ensuring the smoothness of the rotation of the rotating shaft mechanism 100, to adapt to different space requirements, thereby making the rotating shaft mechanism 100 have higher design flexibility and be able to adapt to different application scenarios.

[0303] In an embodiment, the fourth sliding grooves of at least two of the second connecting members are at least partially misaligned in the Z direction, and the second shaft bodies of at least two of the third swing arms are at least partially misaligned in the Z direction. For example, the fourth sliding groove 223 of the second connecting member 22 is misaligned in the Z direction with the fourth sliding grooves of the second connecting members 22A and 22B, and is located on the positive Z-axis side of the fourth sliding grooves of the second connecting members 22A and 22B, thereby forming a clearance space in the second connecting member 22 to avoid other elements in the foldable electronic device 500. Correspondingly, the second shaft body 323 of the third swing arm 32 is partially or completely misaligned in the Z direction with the second shaft bodies of the third swing arms 32A and 32B, and is located on the positive Z-axis side of the second shaft bodies of the third swing arms 32A and 32B.

[0304] Referring to FIG. 38, FIG. 38 is a cross-sectional structural schematic diagram of a hinge mechanism according to a fifth embodiment of the present application.

[0305] The difference between the present embodiment and the embodiment shown in FIG. 17 is that, in the present embodiment, the first swing arm 31 is rotationally connected to the base 10 via the first shaft pin 6, and the third swing arm 32 is rotationally connected to the base 10 via the second shaft pin 7.

[0306] During rotation of the hinge mechanism 100 from the unfolded state to the folded state, the first connecting member 21 and the first swing arm 31 rotate in the counterclockwise direction, the first swing arm 31 rotates about the first shaft pin 6, the first shaft body 313 slides along the second sliding groove 213 from the first position 217 to the second position 218, and the first shaft body 313 rotates about its axis at the same time. The second connecting member 22 and the third swing arm 32 rotate in the clockwise direction, the third swing arm 32 rotates about the second shaft pin 7, the second shaft body 323 slides along the fourth sliding groove 223 from the third position 227 to the fourth position 228, and the second shaft body 323 rotates about its axis at the same time.

[0307] In the present embodiment, the second sliding groove 213 is provided in the first connecting member 21, so that the first swing arm 31 is rotationally and slidingly connected to the first connecting member 21. This can reduce the rotation angle of the first swing arm 31 relative to the base 10 when the hinge mechanism 100 rotates from the unfolded state to the folded state, thereby avoiding the first swing arm 31 from pressing the display screen 300 when the hinge mechanism 100 is in the folded state, and thus improving the display effect of the display screen 300 and prolonging the service life of the display screen 300.

[0308] Meanwhile, in the present embodiment, the first shaft pin 6 is used to rotationally connect the base 10 and the first swing arm 31, which can improve the connection stability of the first swing arm 31 and the base 10, and thus improve the rotation stability of the hinge mechanism 100.

[0309] In the embodiment, the fourth sliding groove 223 is arranged on the second connecting piece 22, so that the third swing arm 32 is rotationally and slidingly connected with the second connecting piece 22. The rotation angle of the third swing arm 32 relative to the base 10 when the rotating shaft mechanism 100 rotates from the unfolded state to the folded state can be reduced. Thus, the third swing arm 32 can avoid pressing the display screen 300 when the rotating shaft mechanism 100 is in the folded state. The display effect of the display screen 300 can be improved, and the service life of the display screen 300 can be prolonged.

[0310] Meanwhile, in the embodiment, the second shaft pin 7 is arranged to rotationally connect the base 10 and the third swing arm 32. The connection stability of the third swing arm 32 and the base 10 can be improved, so that the rotation stability of the rotating shaft mechanism 100 can be further improved.

[0311] The above is only some embodiments and implementation manners of the application, and the protection scope of the application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A rotating shaft mechanism, characterized in that, The application relates to a rotating shaft mechanism. The rotating shaft mechanism comprises a base, a first swing arm, a second swing arm and a first connecting piece. The first connecting piece is located on one side of the base in the width direction, one end of the first swing arm is rotationally connected with the base, and the other end of the first swing arm is rotationally and slidingly connected with the first connecting piece. The second swing arm is located on one side of the first swing arm in the length direction of the base, one end of the second swing arm is rotationally connected with the base, the other end of the second swing arm is slidingly connected with the first connecting piece, and the second swing arm is rotationally and slidingly connected with the first swing arm. The first connecting piece, the first swing arm and the second swing arm can rotate relative to the base to make the rotating shaft mechanism have an unfolded state and a folded state; when the rotating shaft mechanism is rotated from the unfolded state to the folded state, the first swing arm moves relative to the first connecting piece towards the opposite direction of the rotating direction of the first connecting piece.

2. The rotation shaft mechanism according to claim 1, wherein The base is provided with a first rotating groove, the cross section of the first rotating groove is arc-shaped, one end of the first swing arm away from the first connecting piece is installed in the first rotating groove and can slide along the first rotating groove.

3. The rotation axis mechanism according to claim 2, wherein The first swing arm comprises a first sliding rail, and the first sliding rail is arranged on one side of the first swing arm towards the second swing arm. The second swing arm comprises a first sliding column and a second sliding column, the first sliding column and the second sliding column are arranged at intervals, the first sliding column and the second sliding column clamp the first sliding rail, and the first sliding column and the second sliding column can slide and rotate relative to the first swing arm along the first sliding rail.

4. The rotation shaft mechanism according to claim 3, wherein The first sliding rail comprises a first end and a second end, the first end and the second end are arranged at intervals along the extension direction of the first sliding rail, the first end and the second end are arranged at intervals in the thickness direction of the first swing arm and the length direction of the first swing arm, and the second end is located on one side of the first end close to the base. When the rotating shaft mechanism is rotated from the unfolded state to the folded state, the first sliding column and the second sliding column slide along the first sliding rail from the first end towards the second end.

5. The rotation shaft mechanism according to claim 4, wherein The cross section of the first sliding rail is arc-shaped, the first sliding rail comprises a first section and a second section connected in sequence, the first end is located on one end of the first section away from the second section, the second end is located on one end of the second section away from the first section, and the curvature radius of the first section is greater than that of the second section. When the rotating shaft mechanism is in the unfolded state, the first sliding column and the second sliding column are located in the first section; when the rotating shaft mechanism is in the folded state, the first sliding column and the second sliding column are located in the second section.

6. The rotation shaft mechanism according to claim 5, wherein The second section is provided with a first stop surface, and the first stop surface faces the base. The second sliding column is located on one side of the first sliding column close to the base, the second sliding column is provided with a second stop surface, the second stop surface is located on one side of the second sliding column away from the base, and when the rotating shaft mechanism is in the folded state, the second stop surface and the first stop surface are oppositely and intervally arranged in the thickness direction of the base.

7. The rotation axis mechanism according to claim 6, wherein The second stop surface is a plane, and the second slide post further comprises a first arc surface connected with the second stop surface; when the first swing arm and the second swing arm rotate relative to the base, the first arc surface slides along the first slide rail.

8. The rotation axis mechanism according to claim 2, wherein The first swing arm is provided with a first sliding groove; the second swing arm comprises a first slide shaft arranged in the first sliding groove and capable of sliding and rotating relative to the first swing arm along the first sliding groove.

9. The revolute mechanism according to any one of claims 1 to 8, wherein The first connecting member is provided with a second sliding groove; the first swing arm comprises a first shaft body arranged at one end of the first swing arm away from the base, mounted in the second sliding groove, and capable of sliding and rotating relative to the first connecting member along the second sliding groove.

10. The rotation mechanism according to claim 9, wherein The second sliding groove comprises a first position and a second position, which are respectively located at opposite ends of the extension direction of the second sliding groove and are arranged in the thickness direction of the first connecting member; When the rotating shaft mechanism is in the unfolded state, the first shaft body is located at the first position; when the rotating shaft mechanism is in the folded state, the first shaft body is located at the second position, and the second position is located on the side of the first position away from the center of the base.

11. The rotation shaft mechanism according to claim 10, wherein The cross section of the second sliding groove is arc-shaped, and when the rotating shaft mechanism is in the folded state, the tangent line of the second sliding groove at the second position is parallel to the width direction of the base.

12. The rotation shaft mechanism according to claim 9, wherein The second sliding groove, the first swing arm and the second swing arm are multiple, the second sliding grooves are arranged in the length direction of the first connecting member, the first swing arms are arranged in one-to-one correspondence with the second sliding grooves, the first shaft body of each first swing arm is mounted in the corresponding second sliding groove, the second swing arms are arranged in one-to-one correspondence with the first swing arms, each second swing arm is rotationally and slidingly connected with the corresponding first swing arm, and two second sliding grooves are at least partially misaligned in the thickness direction of the first connecting member.

13. The revolute mechanism of claim 1, wherein When the rotating shaft mechanism rotates from the unfolded state to the folded state, the rotation angle of the first swing arm relative to the base is 90°-100°.

14. The revolute mechanism of claim 1, wherein The rotating shaft mechanism further comprises a second connecting member, a third swing arm and a fourth swing arm; the second connecting member is located on the opposite side of the first connecting member in the width direction of the base, one end of the third swing arm is rotationally connected with the base, and the other end of the third swing arm is rotationally and slidingly connected with the second connecting member; In the length direction of the base, the fourth swing arm is located on one side of the third swing arm; one end of the fourth swing arm is rotationally connected with the base, the other end of the fourth swing arm is slidingly connected with the second connecting member, and the fourth swing arm is rotationally and slidingly connected with the third swing arm; When the rotating shaft mechanism rotates from the unfolded state to the folded state, the third swing arm moves in the opposite direction of the rotation direction of the second connecting member towards the second connecting member.

15. The rotation mechanism according to claim 14, wherein The rotating shaft mechanism further comprises a first support and a second support, the first support is arranged in a stack with the first connecting piece, and the first support is rotationally connected with the first connecting piece and rotationally and slidingly connected with the second swing arm; the second support is arranged in a stack with the second connecting piece, and the second support is rotationally connected with the second connecting piece and rotationally and slidingly connected with the fourth swing arm; When the rotating shaft mechanism is in the folded state, the first support and the second support are arranged oppositely, and the distance between the first support and the second support gradually increases along the direction close to the base; When the rotating shaft mechanism is in the unfolded state, the first support and the second support are respectively located on opposite sides of the width direction of the base, and the top surface of the first support is flush with the top surface of the second support.

16. A foldable electronic device, characterized by The rotating shaft mechanism comprises a first shell, a second shell and a rotating shaft mechanism as claimed in any one of claims 1 to 15, and the rotating shaft mechanism is connected between the first shell and the second shell.

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