Rotating mechanism and folding electronic equipment

Abstract

The embodiment of the invention provides a rotating mechanism and folding electronic equipment. The rotating mechanism and the folding electronic equipment are used for solving the problem that a flexible screen is poor in reliability. The rotating mechanism comprises a main shaft, two rotating shaft assemblies and a supporting door plate. The first rotating shaft assembly is rotationally connected with the main shaft, the second rotating shaft assembly is rotationally connected with the main shaft, and the supporting door plate comprises a first sub-part, a second sub-part, a third sub-part and a fourth sub-part. When the two rotating shaft assemblies are in a flat state, the four sub-parts are sequentially arranged in the second direction and jointly form a supporting plane. When the rotating mechanism is converted from the flat state to the folded state, the four sub-parts rotate relative to the main shaft and are not bent. When the two rotating shaft assemblies are in the folded state, the flexible screen can be bent into a water drop shape or an approximate water drop shape in the screen containing space defined by the four sub-parts and the main shaft, and excessive extrusion on the flexible screen is avoided. And the distance between the first end of the second sub-part and the first end of the third sub-part is increased, so that the screen accommodating space is further increased.

Description

Rotating mechanism and foldable electronic device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on December 21, 2023, with application number 202311777126.5 and application name “Rotating Mechanism and Folding Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the technical field of foldable electronic products, and in particular to a rotating mechanism and a foldable electronic device. Background Art

[0003] With the continuous development of display technology, foldable display terminals are becoming a trend in future mobile electronic products. When unfolded, these devices can provide a larger display area, enhancing viewing experience. When folded, they can also be compact, making them easier to carry.

[0004] Among them, the foldable electronic device includes at least: a flexible screen and a shell device, and the shell device includes two structural members for supporting the flexible screen and a rotating mechanism. The two structural members are connected to both sides of the rotating mechanism. During actual use, the rotating mechanism drives the two structural members to rotate so that the foldable electronic device can be folded or unfolded. In traditional screen-folding electronic devices, when the electronic device is folded, the flexible screen is folded inside the shell device. The bent part of the flexible screen is easily damaged due to excessive squeezing by the shell device, resulting in poor reliability of the flexible screen.

[0005] Summary of the Invention

[0006] Embodiments of the present application provide a rotating mechanism and a foldable electronic device for improving the problem of poor reliability of flexible screens.

[0007] To achieve the above objectives, the present invention provides the following solutions:

[0008] On the one hand, a rotation mechanism is provided, comprising: a main shaft, two rotating shaft assemblies, and a supporting door panel. The main shaft extends along a first direction. The two rotating shaft assemblies include a first rotating shaft assembly and a second rotating shaft assembly, the first rotating shaft assembly being rotationally connected to the main shaft, and the second rotating shaft assembly being rotationally connected to the main shaft, wherein the rotation axes of the two rotating shaft assemblies relative to the main shaft are parallel to the first direction and do not overlap. The supporting door panel includes four subsections, including a first subsection, a second subsection, a third subsection, and a fourth subsection. The first subsection is connected to the first rotating shaft assembly, and the second subsection is connected to the first rotating shaft assembly; the third subsection is connected to the second rotating shaft assembly, and the fourth subsection is connected to the second rotating shaft assembly.

[0009] When the two hinge assemblies are in a flat state, the first, second, third, and fourth subsections are arranged in sequence along the second direction; the first, second, third, and fourth subsections together form a support plane; in the second direction, the second end of the first subsection, the first end of the first subsection, the second end of the second subsection, the first end of the second subsection, the first end of the third subsection, the second end of the third subsection, the first end of the fourth subsection, and the second end of the fourth subsection are arranged in sequence; the distance between the first end of the second subsection and the first end of the third subsection along the second direction is a first distance; and the second direction is perpendicular to the first direction. The support plane can be used to support the flexible screen and improve its flatness when in a flat state. Here, "support plane" can be understood as a horizontal plane or a nearly horizontal plane. The horizontal plane can be a horizontal surface parallel to the first and second directions, and the nearly horizontal plane can be a slightly undulating surface. The acceptable deviation range of the nearly horizontal plane can be, for example, a deviation within 5%.

[0010] When the rotating mechanism transitions from the flat state to the folded state, the first, second, third, and fourth sub-sections rotate relative to the main axis, and none of the four sub-sections supporting the door panel bend. Here, "no bending" can be understood to mean that the four sub-sections supporting the door panel do not elastically deform from a macroscopic perspective. For example, the first, second, third, and fourth sub-sections can all be made of rigid materials, and the structural shapes of the four sub-sections supporting the door panel do not change from a macroscopic perspective during the transition of the rotating mechanism from the flat state to the folded state.

[0011] When the two hinge assemblies are in the folded state, in the second direction, the distance between the first end of the first subsection and the first end of the fourth subsection is greater than the distance between the second end of the first subsection and the second end of the fourth subsection. In the second direction, the distance between the first end of the second subsection and the first end of the third subsection is less than the distance between the second end of the second subsection and the second end of the third subsection. The distance between the first end of the second subsection and the first end of the third subsection along the second direction is a second distance, which is greater than the first distance. Through the above arrangement, the flexible screen can bend into a teardrop shape or a near-teardrop shape within the screen-containing space enclosed by the first, second, third, and fourth subsections and the main axis, avoiding excessive compression on the flexible screen, thereby reducing stress on the flexible screen and improving its reliability. Furthermore, because the second distance is greater than the first distance, when the two hinge assemblies are in the flat state, the distance between the first end of the second subsection and the first end of the third subsection is reduced, which helps to improve the support effect of the flexible screen. When the two hinge assemblies are in a folded state, the distance between the first end of the second sub-section and the first end of the third sub-section increases, which is conducive to further increasing the screen space surrounded by the first sub-section, the second sub-section, the third sub-section, the fourth sub-section and the main axis, thereby further improving the reliability of the flexible screen.

[0012] In some embodiments, when the two rotating shaft assemblies are in a folded state, the distance between the first sub-section and the fourth sub-section in the second direction gradually increases in the direction close to the main axis. Through the above arrangement, the flatness of the support plane formed by the first sub-section and the fourth sub-section is ensured, thereby ensuring the supporting effect of the first sub-section and the fourth sub-section. At the same time, it is beneficial to improve the regularity of the first sub-section and the fourth sub-section, and improve the preparation efficiency of the first sub-section and the fourth sub-section. Alternatively, the distance between the first sub-section and the fourth sub-section in the second direction first decreases and then increases. Through the above arrangement, when the two rotating shaft assemblies are in a folded state, the second end of the first sub-section and the second end of the fourth sub-section can be avoided from interfering with the flexible screen, which is beneficial to improving the reliability of the flexible screen.

[0013] In some embodiments, when the two rotating shaft assemblies are folded, the distance between the second sub-section and the third sub-section in the second direction gradually decreases as they approach the main axis. This arrangement ensures the flatness of the support plane formed by the second and third sub-sections, thereby ensuring the support effectiveness of the second and third sub-sections. This also helps improve the regularity of the second and third sub-sections, thereby increasing their production efficiency.

[0014] In some embodiments, the first rotating shaft assembly includes a first connecting rod, a second connecting rod, and a bracket, wherein the first end of the first connecting rod is rotatably connected to the main shaft, the second end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the second end of the second connecting rod is rotatably connected to the bracket, and the rotation axis of the bracket relative to the second connecting rod is parallel to the first direction, the rotation axis of the second connecting rod relative to the first connecting rod is parallel to the first direction, and the rotation axis of the first connecting rod relative to the main shaft is parallel to the first direction; the first sub-section is connected to the first rotating shaft assembly, and the second sub-section is connected to the first rotating shaft assembly, including: the first sub-section is connected to the second connecting rod, and the second sub-section is connected to the first connecting rod. Through the above arrangement, when the first structural member drives the bracket to rotate, the bracket can drive the second connecting rod to rotate relative to the main shaft, so that the first sub-section can rotate relative to the main shaft, and the second connecting rod can drive the first connecting rod to rotate relative to the main shaft, so that the second sub-section can rotate relative to the main shaft.

[0015] In some embodiments, the first end of the first connecting rod is rotatably connected to the main shaft, including: the first end of the first connecting rod is rotatably connected to the main shaft via a first curved slider and a first curved slot. Alternatively, the first end of the first connecting rod includes the first curved slider, and the main shaft includes the first curved slot; or, the first end of the first connecting rod includes the first curved slot, and the main shaft includes the first curved slider. With this arrangement, the first connecting rod can be installed within the main shaft, and the first connecting rod can be rotatably connected to the main shaft via a virtual axis connection.

[0016] In some embodiments, the first end of the second connecting rod is connected to the second end of the first connecting rod via a pin, and the second end of the second connecting rod is rotatably connected to the bracket, including: the second end of the second connecting rod is rotatably connected to the bracket via a second arc-shaped slider and a second arc-shaped slot. The second end of the second connecting rod includes a second arc-shaped slider, and the bracket includes a second arc-shaped slot; or, the second end of the second connecting rod includes a second arc-shaped slot, and the bracket includes a second arc-shaped slider. Through the above arrangement, the first end of the second connecting rod is rotatably connected to the second end of the first connecting rod by rotating about a physical axis, which is beneficial to improving the rotation accuracy and connection reliability between the second connecting rod and the first connecting rod. The second connecting rod is rotatably connected to the bracket by connecting about a virtual axis. Furthermore, the second connecting rod and the bracket are connected by a virtual axis so that the second connecting rod can be closer to the flexible screen relative to the bracket's rotation axis, avoiding pulling on the flexible screen during rotation of the hinge assembly, which is beneficial to improving the reliability of the flexible screen.

[0017] In some embodiments, the first rotating shaft assembly further comprises a third link, wherein the first end of the third link is rotatably connected to the first link, and the second end of the third link is rotatably connected to the bracket; the rotation axis of the third link relative to the first link is a first axis, the first axis is parallel to the first direction, the rotation axis of the second link relative to the first link is a second axis, and when the two rotating shaft assemblies are in a flat state, the second axis is farther away from the main shaft in a third direction compared to the first axis; the rotation axis of the third link relative to the bracket is a third axis, the third axis is parallel to the first direction, and the rotation axis of the second link relative to the bracket is a fourth axis, and when the two rotating shaft assemblies are in a flat state, the fourth axis is farther away from the main shaft in a third direction compared to the third axis, and the third direction is perpendicular to the first and second directions. Through the above arrangement, the first link, the second link, the third link, and the bracket can together constitute a four-bar linkage, which can play the role of a main motion and can drive the motion of other mechanisms connected between the bracket and the main shaft.

[0018] In some embodiments, the second end of the third connecting rod is connected to the bracket via a pin, the first connecting rod includes a third curved slot, and the first end of the third connecting rod is rotationally connected to the first connecting rod. This includes: the first end of the third connecting rod is rotationally connected to the first connecting rod via a third curved slider and the third curved slot. Alternatively, the first end of the third connecting rod includes the third curved slider, and the first connecting rod includes the third curved slot; or, alternatively, the first end of the third connecting rod includes the third curved slot, and the first connecting rod includes the third curved slider. Through the above arrangement, the third connecting rod is rotationally connected to the first connecting rod via a virtual axis connection, and the third connecting rod and the bracket are rotationally connected via a physical axis rotation. It is understood that the virtual axis rotation requires the provision of a corresponding curved slot and curved slider, which in turn consumes a considerable amount of space. Rotating the third connecting rod and the bracket via a physical axis connection helps reduce the size of the bracket and improves the reliability of the connection between the third connecting rod and the bracket.

[0019] In some embodiments, the first rotating shaft assembly further includes a fourth connecting rod, wherein a first end of the fourth connecting rod is rotatably connected to the main shaft, and a second end of the fourth connecting rod is rotatably connected to the bracket, and a rotation axis of the bracket relative to the fourth connecting rod and a rotation axis of the fourth connecting rod relative to the main shaft are both parallel to the first direction. The provision of the fourth connecting rod further improves the connection reliability between the bracket and the main shaft.

[0020] In some embodiments, the second end of the fourth connecting rod is connected to the bracket via a pin, and the first end of the fourth connecting rod is rotationally connected to the main shaft, including: the first end of the fourth connecting rod is rotationally connected to the main shaft via a fourth arc-shaped slider and a fourth arc-shaped slot. The first end of the fourth connecting rod includes a fourth arc-shaped slider, and the main shaft also includes a fourth arc-shaped slot; or, the first end of the fourth connecting rod includes a fourth arc-shaped slot, and the main shaft also includes a fourth arc-shaped slider. Through the above arrangement, the fourth body and the bracket can be rotationally connected by a physical axis connection, and when the fourth connecting rod and the main shaft are rotationally connected by a virtual axis connection, the fourth connecting rod can rotate relative to the main shaft while the fourth arc-shaped slider slides along the fourth arc-shaped slot.

[0021] In some embodiments, the first rotating shaft assembly further comprises a rocker arm, wherein a first end of the rocker arm is rotationally connected to the main shaft, and the rotation axis of the rocker arm relative to the main shaft is parallel to a first direction, and a second end of the rocker arm is slidably connected to the bracket, and the sliding direction of the rocker arm relative to the bracket is not parallel to the extension direction of the bracket; wherein, when the two rotating shaft assemblies rotate from a flat state to a folded state, the bracket slides relative to the rocker arm in a direction away from the main shaft; and when the two rotating shaft assemblies rotate from a folded state to a flat state, the bracket slides relative to the rocker arm in a direction toward the main shaft. The above arrangement facilitates adjustment of the length between the two brackets, and helps ensure that the length of the flexible screen does not change during the folding or unfolding of the two rotating shaft assemblies, thereby reducing the phenomenon of squeezing or stretching the flexible screen by the rotating mechanism.

[0022] In some embodiments, the first end of the swing arm includes a swing arm slider, the second end of the swing arm is rotatably connected to the main shaft via a pin, and the bracket includes a bracket slot, with the swing arm slider slidably connected to the bracket slot. This arrangement allows the swing arm and the main shaft to be rotatably connected via a physical shaft connection, which improves the connection reliability and rotational accuracy between the swing arm and the main shaft.

[0023] In some embodiments, the support door panel further includes a bent portion connected between the second sub-section and the first sub-section. When the two hinge assemblies are flat, the bent portion is flat; when the two hinge assemblies are folded, the bent portion bends, forming a bending angle between the first and second sub-sections. This arrangement allows the bent portion to fill the gap between the second and first sub-sections, further enhancing the support provided by the support door panel to the flexible screen when the two hinge assemblies are flat.

[0024] In some embodiments, the bent portion, the second sub-portion and the first sub-portion are an integrated structure. The above arrangement is conducive to improving the connection reliability of the supporting door panel.

[0025] In some embodiments, the bending portion has a plurality of through holes passing therethrough. The above arrangement is conducive to reducing the rigidity of the bending portion and reducing the elastic force of the bending portion on the flexible screen when bending, thereby improving the bending feel of the supporting door panel.

[0026] In some embodiments, the thickness of the bent portion is less than that of the first sub-section, and the thickness of the bent portion is less than that of the second sub-section. This arrangement helps reduce the rigidity of the bent portion and the elastic force exerted by the bent portion on the flexible screen during bending, thereby improving the bending feel of the supporting door panel.

[0027] In some embodiments, the supporting door panel further includes a flexible layer connected to the same side of the second sub-section and the first sub-section, with the flexible layer located between the second and first sub-sections being a bent portion. With this arrangement, when the two rotating shaft assemblies are in a flat position, the flexible layer located between the second and first sub-sections is flattened, further enhancing the supporting effect of the supporting door panel on the flexible screen. When the two rotating shaft assemblies are in a folded position, the flexible layer located between the second and first sub-sections is bent.

[0028] In some embodiments, in a direction perpendicular to the support plane, the first sub-section and the main axis at least partially overlap, and the second sub-section and the main axis at least partially overlap. This arrangement helps reduce the size of the rotating mechanism along the second direction, thereby facilitating a thinner and lighter foldable electronic device.

[0029] On the other hand, a foldable electronic device is provided, comprising: a flexible screen, a first structural member, a second structural member, and a rotating mechanism as in any of the above embodiments. The first structural member and the second structural member are connected to both sides of the rotating mechanism, and the flexible screen is located on the same side of the first structural member and the second structural member, and is connected to the first structural member and the second structural member. When the foldable electronic device is in the unfolded state, the supporting plane of the rotating mechanism is used to support the flexible screen. When the foldable electronic device is in the folded state, the first sub-portion of the rotating mechanism, the second sub-portion of the rotating mechanism, the third sub-portion of the rotating mechanism, the fourth sub-portion of the rotating mechanism, and the main axis of the rotating mechanism together enclose a screen-accommodating space, and part of the flexible screen is located in the screen-accommodating space. The foldable electronic device provided in the embodiment of the present application includes the rotating mechanism as described above, and therefore has all the above-mentioned beneficial effects, which will not be repeated here.

[0030] In some embodiments, at least one of the first sub-section, the second sub-section, the third sub-section, and the fourth sub-section is connected to the flexible screen. Through the above arrangement, the flexible screen can be fixed on the supporting door panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a structural diagram of a foldable electronic device provided in an embodiment of the present application;

[0032] FIG2 is a structural diagram of a foldable electronic device in a flat state provided by an embodiment of the present application;

[0033] FIG3 is a partial exploded view of the foldable electronic device in FIG2 ;

[0034] FIG4 is a cross-sectional view of the foldable electronic device in FIG2 in a folded state taken along the AA section line;

[0035] FIG5 is a cross-sectional view of the foldable electronic device in FIG2 in a flat state taken along the cross-sectional line BB;

[0036] FIG6 is a cross-sectional view of the foldable electronic device in FIG2 in a folded state taken along section line CC;

[0037] FIG7 is an exploded view of the structure of a rotating mechanism provided in an embodiment of the present application;

[0038] FIG8 is a structural diagram of a rotation module provided in an embodiment of the present application;

[0039] FIG9 is an exploded view of the structure of a rotation module provided in an embodiment of the present application;

[0040] FIG10 is an exploded view of the structure of another rotation module provided in an embodiment of the present application;

[0041] FIG11a is a structural diagram of a main shaft provided in an embodiment of the present application;

[0042] FIG11 b is a structural diagram of a supporting mating portion in a spindle provided in an embodiment of the present application;

[0043] FIG12 is a structural diagram of a first connecting rod provided in an embodiment of the present application;

[0044] FIG13 is a structural diagram of a second connecting rod provided in an embodiment of the present application;

[0045] FIG14 is a structural diagram of a bracket provided in an embodiment of the present application;

[0046] FIG15 is a structural diagram of a third connecting rod provided in an embodiment of the present application;

[0047] FIG16 is a partial cross-sectional view of a rotating mechanism provided in an embodiment of the present application in an expanded state;

[0048] FIG17 is a partial cross-sectional view of a rotating mechanism provided in an embodiment of the present application in a folded state;

[0049] FIG18 is an exploded view of the structure of another rotation module provided in an embodiment of the present application;

[0050] FIG19 is a structural diagram of a fourth connecting rod provided in an embodiment of the present application;

[0051] FIG20 is a structural diagram of another supporting and matching portion of a main shaft provided in an embodiment of the present application;

[0052] FIG21 is a structural diagram of a rocker provided in an embodiment of the present application;

[0053] FIG22 is a partial cross-sectional view of another rotating mechanism provided in an embodiment of the present application in a flattened state;

[0054] FIG23 is a partial cross-sectional view of another rotating mechanism provided by an embodiment of the present application in a folded state;

[0055] FIG24 is a diagram showing the main motion principle of another rotation mechanism provided in an embodiment of the present application;

[0056] FIG25 is a partial exploded view of another rotating mechanism provided in an embodiment of the present application;

[0057] FIG26 is a partial structural diagram of another second part provided in an embodiment of the present application;

[0058] FIG27 is a cross-sectional view of the rotating mechanism in FIG25 along the FF section line in a flat state;

[0059] FIG28 is a cross-sectional view of the rotating mechanism in FIG25 in a folded state taken along section line FF;

[0060] FIG29 is a structural diagram of another supporting door panel provided in an embodiment of the present application;

[0061] FIG30 is a partial enlarged view of the support door panel at position N in FIG29;

[0062] FIG31 is a structural diagram of another supporting door panel provided in an embodiment of the present application;

[0063] FIG32 is a cross-sectional view of a supporting door panel along section line GG in FIG31;

[0064] FIG33 is a cross-sectional view of another supporting door panel along section line GG in FIG31;

[0065] FIG34 is an exploded view of a first structural portion provided in an embodiment of the present application;

[0066] FIG35 is a structural diagram of a first mating portion of a spindle provided in an embodiment of the present application;

[0067] FIG36 is a structural diagram of a damping slider provided in an embodiment of the present application;

[0068] FIG37 is an exploded view of a second structural portion provided in an embodiment of the present application;

[0069] FIG38 is a structural diagram of a second mating portion of a spindle provided in an embodiment of the present application;

[0070] FIG39 is a structural diagram of a first synchronization slider provided in an embodiment of the present application;

[0071] Figure 40 is a structural diagram of a second synchronization slider provided in an embodiment of the present application. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0073] In the following, the terms "first," "second," etc., are used for descriptive convenience only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0074] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0075] In the embodiments of the present application, directional indications such as up, down, left, right, front, and back, used to explain the structure and movement of various components of the present application are relative. These indications are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, these directional indications will also change accordingly.

[0076] The present invention provides a foldable electronic device, wherein the foldable electronic device can be a mobile phone, a tablet computer (pad), a television, a smart wearable product (e.g., a smart watch, a smart bracelet), or other terminal products.

[0077] In order to facilitate understanding of the foldable electronic device 1 provided in the embodiment of the present application, FIG1 is a structural diagram of a foldable electronic device 1 provided in the embodiment of the present application. In conjunction with FIG1 , the foldable electronic device 1 is described as follows:

[0078] As shown in Figure 1, the foldable electronic device 1 includes a flexible screen 30. The flexible screen 30 may be an active matrix organic light emitting diode (AMOLED) display screen.

[0079] AMOLED displays are self-luminous and do not require a backlight module (BLM). Therefore, when the base substrate of an AMOLED display is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display can be bendable.

[0080] In addition, as shown in Figure 1, the folding electronic device 1 also includes a rotating mechanism 10, a first structural member 21 and a second structural member 22 for carrying the flexible screen 30. The rotating mechanism 10 is connected between the first structural member 21 and the second structural member 22. The first structural member 21 and the second structural member 22 are used to carry the flexible screen 30, so that the flexible screen 30 remains as flat as possible during use and to protect the non-display surface of the flexible screen 30. The first structural member 21 and the second structural member 22 can rotate relative to the rotating mechanism 10 respectively. The embodiment of the present application only briefly illustrates part of the structure of the first structural member 21 and the second structural member 22, and the accompanying drawings also provide simplified illustrations. The embodiment of the present application does not strictly limit the specific structure of the first structural member 21 and the second structural member 22.

[0081] The first structural member 21 and the second structural member 22 may each include a mid-frame structure for mounting and securing other components of the foldable electronic device 1. For example, a camera, earphones, receiver, buttons, batteries, etc., are not limited in this embodiment of the application to other electronic components disposed on the first structural member 21 and the second structural member 22. The first structural member 21 and the second structural member 22 may each include a decorative cover plate for protecting components within the mid-frame structure and for presenting a portion of the appearance of the foldable electronic device 1.

[0082] For example, a portion of the flexible screen 30 can be fixed to the first structural member 21 via an adhesive layer 40, a portion can be fixed to the second structural member 22 via an adhesive layer 40, and a portion can be fixed to the rotating mechanism 10. The adhesive layer 40 can be a thin film layer formed by coating with glue. The specific form of the adhesive layer 40 is not limited in this embodiment of the application. For example, the adhesive layer 40 can be a discontinuous thin film layer, or the adhesive layer 40 can also be a continuous thin film layer. In addition, other electronic components can be provided on the first structural member 21 and the second structural member 22.

[0083] Figure 2 is a structural diagram of a foldable electronic device 1 in a flat state provided by an embodiment of the present application, wherein the dotted line frame in Figure 2 indicates the placement position of the flexible screen 30 when it is in a flat state. Figure 3 is an exploded view of the partial structure of the foldable electronic device 1 in Figure 2. Referring to Figures 2 and 3, the rotating mechanism 10 includes a main shaft 100 and two rotating shaft assemblies 300. For ease of explanation, the first direction X is defined as the extension direction of the main shaft 100, the second direction Y is perpendicular to the first direction X, and the third direction Z is perpendicular to the plane where the first direction X and the second direction Y are located. The two rotating shaft assemblies 300 are arranged along the second direction Y, and the two rotating shaft assemblies 300 are respectively connected to the main shaft 100 for rotation. The rotation axes of the two rotating shaft assemblies 300 relative to the main shaft 100 are parallel to the first direction X and do not overlap.

[0084] For example, one end of one hinge assembly 300 is rotatably connected to the main shaft 100, and the other end of one hinge assembly 300 is connected to the first structural member 21; one end of another hinge assembly 300 is rotatably connected to the main shaft 100, and the other end of the other hinge assembly 300 is connected to the second structural member 22. For example, the two hinge assemblies 300 may include a first hinge assembly 300a and a second hinge assembly 300b. One end of the first hinge assembly 300a is rotatably connected to the main shaft 100, and the other end of the first hinge assembly 300a is connected to the first structural member 21; one end of the second hinge assembly 300b is rotatably connected to the main shaft 100, and the other end of the second hinge assembly 300b is connected to the second structural member 22. Through this arrangement, the first structural member 21 can drive the first hinge assembly 300a to rotate relative to the main shaft 100, and the second structural member 22 can drive the second hinge assembly 300b to rotate relative to the main shaft 100, thereby achieving folding or unfolding of the foldable electronic device 1.

[0085] As shown in Figure 2, when the first structural member 21 and the second structural member 22 are in a flat state, the angle between the first structural member 21 and the second structural member 22 can be approximately 180° (it can be understood that the angle between the first structural member 21 and the second structural member 22 is also allowed to have a slight deviation, for example, the angle can be 165°, 177° or 185°). At this time, the two hinge assemblies 300 are in a flat state, and the flexible screen 30 is also in a flat state, that is, the folding electronic device 1 is in a flat state.

[0086] Figure 4 is a cross-sectional view of the foldable electronic device 1 in Figure 2 taken along section line AA in the folded state. The dashed box in Figure 4 indicates the placement of the flexible screen 30 when in the folded state. As shown in Figure 4, when the first structural member 21 and the second structural member 22 are in the folded state, the angle between the first structural member 21 and the second structural member 22 can be approximately 0° (it is understood that the angle between the first structural member 21 and the second structural member 22 is also allowed to vary slightly, for example, the angle can be 1°, 3°, or 5°). At this time, the two hinge assemblies 300 are in the folded state, the flexible screen 30 is also in the folded state, and the foldable electronic device 1 is in the folded state. In some embodiments, when the first structural member 21 and the second structural member 22 are in the folded state, the first structural member 21 and the second structural member 22 can contact each other to achieve positioning. In some other embodiments, when the first structural member 21 and the second structural member 22 are in the folded state, the first structural member 21 and the second structural member 22 can also be close to each other, with a small gap between them. This is not specifically limited in the present embodiment.

[0087] Continuing with reference to Figures 2, 3, and 4, the rotation mechanism 10 includes a support door panel 310, which is used to support the flexible screen 30. In some embodiments of the related art, there may be two support door panels 310. When the first structural member 21 and the second structural member 22 are in a flat state, the two support door panels 310 are located on both sides of the main shaft 100, and the two support door panels 310 and the main shaft 100 together provide a good support environment for the flexible screen 30. When the first structural member 21 and the second structural member 22 are in a folded state, the two support door panels 310 are located on the same side of the main shaft 100, and the two support door panels 310 excessively squeeze the flexible screen 30, which may cause damage to the flexible screen 30, thereby reducing the reliability of the flexible screen 30.

[0088] In view of this, referring to Figure 4, in the rotating shaft assembly 300 provided in the embodiment of the present application, the supporting door panel 310 may include a first supporting door panel 310a and a second supporting door panel 310b. The first supporting door panel 310a may include a first part 311 and a second part 312; the second supporting door panel 310b may also include a first part 311 and a second part 312. In some embodiments, the first part 311 and the second part 312 in the same supporting door panel 310 may be two independent structures. Alternatively, in some other embodiments, the first part 311 and the second part 312 in the same supporting door panel 310 may also be an integrated structure. For example, the first part 311 and the second part 312 may be roughly strip-shaped flat plates, and the extension directions of the strip-shaped flat plates may both be parallel to the first direction X.

[0089] In some embodiments, the support door panel 310 may include four sub-sections, including a first sub-section 3129, a second sub-section 3119, a third sub-section 3118, and a fourth sub-section 3128. The first sub-section 3129 and the second sub-section 3119 together constitute the first support door panel 310a. The first sub-section 3129 may be the second portion 312 of the first support door panel 310a, while the second sub-section 3119 may be the first portion 311 of the first support door panel 310a. Furthermore, the first sub-section 3129 is connected to the first rotating shaft assembly 300a, while the second sub-section 3119 is connected to the first rotating shaft assembly 300a. The third sub-section 3118 and the fourth sub-section 3128 together constitute the second support door panel 310b. The third sub-section 3118 may be the first portion 311 of the second support door panel 310b, while the fourth sub-section 3128 may be the second portion 312 of the second support door panel 310b. Furthermore, the third sub-portion 3118 is connected to the second rotating shaft assembly 300 b , and the fourth sub-portion 3128 is connected to the second rotating shaft assembly 300 b .

[0090] In some embodiments, at least one of the first sub-portion 3129 , the second sub-portion 3119 , the third sub-portion 3118 and the fourth sub-portion 3128 may be connected to the flexible screen 30 so that the flexible screen 30 may be fixed on the supporting door panel 310 .

[0091] In some embodiments, the first sub-portion 3129, the second sub-portion 3119, the third sub-portion 3118, and the fourth sub-portion 3128 are not fixedly connected to the flexible screen 30, so that the flexible screen 30 can be freely bent. Here, "freely bent" can be understood as meaning that the bending forms of the first sub-portion 3129, the second sub-portion 3119, the third sub-portion 3118, and the fourth sub-portion 3128 are not related to the flexible screen.

[0092] Figure 5 is a cross-sectional view taken along section line BB of the foldable electronic device 1 in Figure 2 in the flattened state. As shown in Figure 5 , when the two hinge assemblies 300 are in the flattened state, the second portion 312 and the first portion 311 are arranged along the second direction Y, with the two first portions 311 located between the two second portions 312. At least portions of the first portion 311 and the second portion 312 together form a support plane N, which is located on the side of the hinge assembly 300 away from the main shaft 100. When the two hinge assemblies 300 are in the flattened state, at least portions of the first portion 311 and the second portion 312 of the support door panel 310 of each hinge assembly 300 are aligned, so that at least portions of the first portion 311 and the second portion 312 together form the support plane N.

[0093] Here, "at least a portion of the second portion 312" can be understood to mean that the entire second portion 312 can be flush with the first portion 311, or that a portion of the second portion 312 is flush with the first portion 311. As shown in Figure 5, the second portion 312 can include a flat segment 312c and an arc segment 312d, wherein the flat segment 312c can be located between the arc segment 312d and the first portion 311, and the arc segment 312d can be curved in a direction away from the flexible screen 30. In this case, the portion of the second portion 312 is flush with the first portion 311, which can be understood as the flat segment 312c of the second portion 312 is flush with the first portion 311.

[0094] Exemplarily, when the two rotating shaft assemblies 300 are in a flat state, the first sub-section 3129, the second sub-section 3119, the third sub-section 3118 and the fourth sub-section 3128 are arranged in sequence along the second direction Y. The first sub-section 3129, the second sub-section 3119, the third sub-section 3118 and the fourth sub-section 3128 together constitute a support plane. The support plane N can be used to support the flexible screen 30 and improve the flatness of the flexible screen 30 when it is in a flat state. Here, the "support plane N" can be understood as a plane or an approximate plane, wherein the plane can be a surface parallel to the first direction X and the second direction Y, the approximate plane can be a slightly undulating surface, and the acceptable deviation range of the approximate plane can be, for example, a deviation within 5%.

[0095] In some embodiments, the flexible screen 30 can be fixed to the supporting door panel 310 via an adhesive layer 40. The thickness of the adhesive layer 40 between the flexible screen 30 and the supporting door panel 310 can be adjusted to thereby adjust the support provided by the supporting door panel 310 to the flexible screen 30, thereby ensuring that the flexible screen 30 remains flat. In this case, "jointly forming a support plane N" can also be understood as adjusting the thickness of the adhesive layer 40 between the flexible screen 30 and the supporting door panel 310 so that the first sub-portion 3129, the second sub-portion 3119, the third sub-portion 3118, and the fourth sub-portion 3128 jointly form the support plane N, thereby ensuring that the flexible screen 30 remains flat when flattened.

[0096] Exemplarily, when the two rotating shaft assemblies 300 are in a flat position, in the second direction Y, the second end 3129b of the first sub-section, the first end 3129a of the first sub-section, the second end 3119b of the second sub-section, the first end 3119a of the second sub-section, the first end 3118a of the third sub-section, the second end 3118b of the third sub-section, the first end 3128a of the fourth sub-section, and the second end 3128b of the fourth sub-section are arranged in sequence. The distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section along the second direction is a first distance D1. In some embodiments, the first end 3119a of the second sub-section and the first end 3118a of the third sub-section may contact each other, i.e., the first distance D1 is zero. In other embodiments, the first end 3119a of the second sub-section and the first end 3118a of the third sub-section may be close to each other, with a small gap between them. The width of the gap along the second direction Y is the first distance D1.

[0097] In some examples, in a direction perpendicular to the support plane N (i.e., in the third direction Z), the first sub-portion 3129 and the main axis 100 at least partially overlap, and the second sub-portion 3119 and the main axis 100 at least partially overlap. For example, in a direction perpendicular to the support plane N, the orthographic projection of the first sub-portion 3129 on the support plane N at least partially overlaps with the orthographic projection of the main axis 100 on the support plane N, and the orthographic projection of the second sub-portion 3119 on the support plane N at least partially overlaps with the orthographic projection of the main axis 100 on the support plane N. This arrangement facilitates reducing the size of the rotating mechanism 10 along the second direction Y, thereby facilitating a thinner and lighter foldable electronic device 1.

[0098] When the rotating mechanism 10 transitions from the flattened state to the folded state, the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, and the fourth sub-section 3128 rotate relative to the main shaft, and none of the four sub-sections supporting the door panel 310 bends. The first sub-section 3129 is connected to the first rotating shaft assembly 300a, the second sub-section 3119 is connected to the first rotating shaft assembly 300a, the third sub-section 3118 is connected to the second rotating shaft assembly 300b, and the fourth sub-section 3128 is connected to the second rotating shaft assembly 300b. Because the first rotating shaft assembly 300a is rotationally connected to the main shaft 100, when the first rotating shaft assembly 300a rotates relative to the main shaft 100, the first sub-section 3129 and the second sub-section 3119 also rotate relative to the main shaft 100. Because the second rotating shaft assembly 300b is rotatably connected to the main shaft 100, when the second rotating shaft assembly 300b rotates relative to the main shaft 100, the first sub-section 3129 and the second sub-section 3119 also rotate relative to the main shaft 100. Here, "no bending" can be understood as meaning that the four sub-sections supporting the door panel 310 do not undergo elastic deformation from a macroscopic perspective. For example, the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, and the fourth sub-section 3128 can all be made of rigid materials. When the rotating mechanism 10 is transformed from the flat state to the folded state, the structural shapes of the four sub-sections supporting the door panel 310 do not change from a macroscopic perspective.

[0099] FIG6 is a cross-sectional view of the foldable electronic device 1 in FIG2 taken along section line CC in the folded state. As shown in FIG6 , when the two hinge assemblies 300 are in the folded state, in the second direction Y, the distance between the first end 3129a of the first sub-section and the first end 3128a of the fourth sub-section is greater than the distance between the second end 3129b of the first sub-section and the second end 3128b of the fourth sub-section. In the second direction Y, the distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section is less than the distance between the second end 3119b of the second sub-section and the second end 3118b of the third sub-section. The distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section in the second direction Y is a second distance D2, which is greater than the first distance D1.

[0100] When the two rotating shaft assemblies 300 are in a folded state, the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, the fourth sub-section 3128 and the main shaft 100 together constitute a screen space M. In the same supporting door panel 310, a certain bending angle can be provided between the first part 311 and the second part 312. For example, the angle between the first sub-section 3129 and the second sub-section 3119 can be an obtuse angle, and the angle between the third sub-section 3118 and the fourth sub-section 3128 can be an obtuse angle. A certain bending angle can also be provided between the first part 311 and the main shaft 100. For example, the angle between the second sub-section 3119 and the main shaft 100 can be an obtuse angle, and the angle between the third sub-section 3118 and the main shaft 100 can be an obtuse angle. Through the above-mentioned arrangement, combined with what is shown in FIG4 , the flexible screen 30 can be bent into a water drop shape or an approximate water drop shape within the screen-containing space M enclosed by the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, the fourth sub-section 3128 and the main axis 100, thereby avoiding excessive squeezing of the flexible screen 30, thereby reducing the stress of the flexible screen 30 and improving the reliability of the flexible screen 30.

[0101] At the same time, because the second distance D2 is greater than the first distance D1, when the two hinge assemblies 300 are in a flat state, the distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section is reduced, which helps to improve the support effect of the flexible screen 30. When the two hinge assemblies 300 are in a folded state, the distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section is increased, which helps to further increase the screen space M enclosed by the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, the fourth sub-section 3128, and the main shaft 100, thereby further improving the reliability of the flexible screen 30.

[0102] When the two rotating shaft assemblies 300 are in the folded state, the distance between the first end 3129a of the first sub-section and the first end 3128a of the fourth sub-section in the second direction Y is greater than the distance between the second end 3129b of the first sub-section and the second end 3128b of the fourth sub-section. This may include the following embodiments: In some embodiments, the distance between the first sub-section 3129 and the fourth sub-section 3128 in the second direction Y gradually increases as it approaches the main axis 100. For example, the first sub-section 3129 may include only the flat plate segment 312c, and the fourth sub-section 3128 may also include only the flat plate segment 312c. The distance between the flat plate segment 312c of the first sub-section 3129 and the flat plate segment 312c of the fourth sub-section 3128 in the second direction Y gradually increases as it approaches the main axis 100. Here, "in the direction approaching the main axis 100" may be a direction parallel to the third direction Z and pointing toward the main axis 100. The above arrangement ensures the flatness of the support plane N formed by the first subsection 3129 and the fourth subsection 3128, thereby ensuring the support effect of the first subsection 3129 and the fourth subsection 3128. Furthermore, the arrangement helps to improve the regularity of the first subsection 3129 and the fourth subsection 3128, thereby increasing the production efficiency of the first subsection 3129 and the fourth subsection 3128.

[0103] In other embodiments, when the two rotating shaft assemblies 300 are in the folded state, the distance between the first sub-section 3129 and the fourth sub-section 3128 along the second direction Y first decreases and then increases as the shaft approaches the main shaft 100. For example, as shown in FIG6 , the first sub-section 3129 may include a flat section 312c and an arcuate section 312d. The arcuate section 312d is closer to the first end 3129a of the first sub-section than the flat section 312c. Similarly, the fourth sub-section 3128 may also include a flat section 312c and an arcuate section 312d. The arcuate section 312d is closer to the first end 3128a of the fourth sub-section than the flat section 312c. As the shaft approaches the main shaft 100, the distance between the arcuate section 312d of the first sub-section 3129 and the arcuate section 312d of the fourth sub-section 3128 in the second direction Y gradually decreases. The distance between the flat plate segment 312c of the first sub-section 3129 and the flat plate segment 312c of the fourth sub-section 3128 in the second direction Y gradually increases. Here, "in a direction close to the main axis 100" can be a direction parallel to the third direction Z and pointing toward the main axis 100. This arrangement prevents interference between the second end 3129b of the first sub-section and the second end 3128b of the fourth sub-section and the flexible screen 30 when the two hinge assemblies 300 are folded, thereby improving the reliability of the flexible screen 30.

[0104] Of course, in other embodiments, when the two rotating shaft assemblies 300 are in the folded state, the distance between the first sub-section 3129 and the fourth sub-section 3128 along the second direction Y first increases and then decreases in the direction approaching the main shaft 100. Here, "in the direction approaching the main shaft 100" can be a direction parallel to the third direction Z and pointing toward the main shaft 100. Through the above arrangement, the distance between the first sub-section 3129 and the fourth sub-section 3128 in the second direction Y is increased, which helps further increase the screen space M enclosed by the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, the fourth sub-section 3128, and the main shaft 100.

[0105] Similarly, when the two rotating shaft assemblies 300 are in the folded state, in the second direction Y, the distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section is smaller than the distance between the second end 3119b of the second sub-section and the second end 3118b of the third sub-section. The following embodiments may also be included: In some embodiments, the distance between the second sub-section 3119 and the third sub-section 3118 along the second direction Y gradually decreases as it approaches the main axis 100. For example, the second sub-section 3119 and the third sub-section 3118 may both be flat plates. Here, "in a direction approaching the main axis 100" may refer to a direction parallel to the third direction Z and pointing toward the main axis 100. This arrangement ensures the flatness of the support plane N formed by the second sub-section 3119 and the third sub-section 3118, thereby ensuring the support effectiveness of the second sub-section 3119 and the third sub-section 3118. At the same time, it is beneficial to improve the regularity of the second sub-section 3119 and the third sub-section 3118 and improve the preparation efficiency of the second sub-section 3119 and the third sub-section 3118.

[0106] In other embodiments, when the two hinge assemblies 300 are in the folded state, the distance between the second sub-section 3119 and the third sub-section 3118 along the second direction Y first decreases and then increases in the direction approaching the main axis 100. Here, "in the direction approaching the main axis 100" may be a direction parallel to the third direction Z and pointing toward the main axis 100. This arrangement further enhances the effect of the second sub-section 3119 and the third sub-section 3118 on improving the crease of the flexible screen 30 when the two hinge assemblies 300 are in the flat state. Alternatively, in other embodiments, when the two hinge assemblies 300 are in the folded state, the distance between the second sub-section 3119 and the third sub-section 3118 along the second direction Y first increases and then decreases in the direction approaching the main axis 100. Here, "in the direction approaching the main axis 100" may be a direction parallel to the third direction Z and pointing toward the main axis 100. The above arrangement is conducive to further increasing the screen space M enclosed by the first sub-section 3129 , the second sub-section 3119 , the third sub-section 3118 , the fourth sub-section 3128 and the main shaft 100 .

[0107] FIG7 is an exploded view of the structure of a rotation mechanism 10 provided in an embodiment of the present application. As shown in FIG7 , the rotating shaft assembly 300 further includes a rotating portion 320, which can be rotatably connected to the main shaft 100, thereby driving the two rotating shaft assemblies 300 to flatten or fold. For example, the two rotating portions 320 include a first rotating portion 320a and a second rotating portion 320b, wherein the first rotating shaft assembly 300a may include a first rotating portion 320a, which is rotatably connected to the main shaft 100, and the second rotating shaft assembly 300b may include a second rotating portion 320b, which is rotatably connected to the main shaft 100.

[0108] The rotating portion 320 may also be connected to the supporting door panel 310 so that the supporting door panel 310 can rotate relative to the main shaft 100. For example, the first rotating portion 320a may be connected to the first supporting door panel 310a, and the second rotating portion 320b may be connected to the second supporting door panel 310b. When the two hinge assemblies 300 are in a flat state, the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, and the fourth sub-section 3128 can be rotated to a flush state, thereby forming a support plane N for supporting the flexible screen 30; when the two hinge assemblies 300 are in a folded state, in the second direction Y, the distance between the first end 3129a of the first sub-section and the first end 3128a of the fourth sub-section is greater than the distance between the second end 3129b of the first sub-section and the second end 3128b of the fourth sub-section. In the second direction Y, the distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section is less than the distance between the second end 3119b of the second sub-section and the second end 3118b of the third sub-section. The distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section along the second direction Y is increased, thereby avoiding excessive squeezing of the flexible screen 30 by the enclosed screen space M.

[0109] Continuing with FIG7 , the rotation mechanism 10 may include a plurality of rotation modules 400 spaced apart along a first direction X. The number of rotation modules 400 may be adjusted accordingly based on the width of the foldable electronic device 1. For example, as the width of the foldable electronic device 1 increases, the number of rotation modules 400 may be increased to ensure a more stable rotation of the foldable electronic device 1. Each rotation module 400 may include a first rotation portion 320a and a second rotation portion 320b. The plurality of rotation portions 320 disposed along the first direction X in the plurality of rotation modules 400 may be connected to the same support door panel 310.

[0110] Accordingly, the number of main shafts 100 can be multiple, and the multiple main shafts 100 are arranged at intervals along the first direction X, and one main shaft 100 is rotatably connected to the first rotating part 320a and the second rotating part 320b in one rotation module 400. Furthermore, the rotation mechanism 10 can also include a back cover 101, which is stacked with the main shaft 100 along the third direction Z. The extension direction of the back cover 101 can be parallel to the first direction X, and multiple main shafts 100 can be installed on the back cover 101. Through the above arrangement, the rotating parts 320 in multiple rotation modules 400 can rotate relative to the same back cover 101. The back cover 101 can include an appearance surface E, which can be the surface of the back cover 101 away from the main shaft 100, and the appearance surface E is used to display the appearance.

[0111] Alternatively, in some other examples, the number of the main shaft 100 may be one, and a plurality of rotation modules 400 may be installed on one main shaft 100. This embodiment of the present application does not specifically limit this.

[0112] In some embodiments, the rotation module 400 may further include a first structural portion 420 and a second structural portion 410. For example, the rotation mechanism 10 shown in FIG7 may include three rotation modules 400. The rotation module 400 located in the middle may include a first rotation portion 320a and a second rotation portion 320b, as well as a first structural portion 420 and a second structural portion 410, with the first structural portion 420 and the second structural portion 410 located on either side of the rotation portion 320 along the first direction X. The rotation modules 400 located at the edge may include a first structural portion 420, a first rotation portion 320a, and a second rotation portion 320b. The structure of the rotation module 400 will be described below using the rotation module 400 located in the middle of FIG7 as an example.

[0113] Figure 8 is a structural diagram of a rotation module 400 provided in an embodiment of the present application; Figure 9 is an exploded view of the structure of a rotation module 400 provided in an embodiment of the present application; and Figure 10 is an exploded view of the structure of another rotation module 400 provided in an embodiment of the present application. As shown in Figures 8, 9, and 10, the spindle 100 may further include a support mating portion 100a, and first and second mating portions 100b, 100c located on either side of the support mating portion 100a. The support mating portion 100a may be mated and connected with the rotation portion 320, the first mating portion 100b may be mated and connected with the first structural portion 420, and the second mating portion 100c may be mated and connected with the second structural portion 410.

[0114] Continuing with Figures 8, 9, and 10, the first rotating portion 320a may further include a bracket 324. The bracket 324 of the first rotating portion 320a is configured to be fixedly connected to the first structural member 21. The bracket 324 of the first rotating portion 320a may also be connected to the first structural member 420. Similarly, the second rotating portion 320b may further include a bracket 324. The bracket 324 of the second rotating portion 320b is configured to be fixedly connected to the second structural member 22. The bracket 324 of the second rotating portion 320b may also be connected to the second structural member 410.

[0115] In some embodiments, the first rotating portion 320a may further include a first connecting rod 321 and a second connecting rod 322. In the first rotating portion 320a, the first end 321a of the first connecting rod is rotatably connected to the main shaft 100, the second end 321b of the first connecting rod is rotatably connected to the first end 322a of the second connecting rod, and the second end 322b of the second connecting rod is rotatably connected to the bracket 324 of the first rotating portion 320a. The rotation axis of the second connecting rod 322 relative to the first connecting rod 321 is parallel to the first direction X, the rotation axis of the bracket 324 of the first rotating portion 320a relative to the second connecting rod 322 is parallel to the first direction X, and the rotation axis of the first connecting rod 321 relative to the main shaft 100 is parallel to the first direction X. Through the above-mentioned setting, in the first rotating part 320a, the bracket 324 can rotate relative to the second connecting rod 322 along the rotation axis parallel to the first direction X, the second connecting rod 322 can rotate relative to the first connecting rod 321 along the rotation axis parallel to the first direction X, and the first connecting rod 321 rotates relative to the main shaft 100 along the rotation axis parallel to the first direction X.

[0116] Based on the above structure, the first portion 311 of the first supporting door panel 310a can be connected to the first connecting rod 321 of the first rotating portion 320a, that is, the second sub-portion 3119 can be connected to the first connecting rod 321 of the first rotating portion 320a; the second portion 312 of the first supporting door panel 310a can be connected to the second connecting rod 322 of the first rotating portion 320a, that is, the first sub-portion 3129 can be connected to the second connecting rod 322 of the first rotating portion 320a. In some embodiments, the second sub-portion 3119 can be fixedly connected to the first connecting rod 321 of the first rotating portion 320a, and the first sub-portion 3129 can be fixedly connected to the second connecting rod 322 of the first rotating portion 320a. For example, the second sub-portion 3119 can be bonded to the first connecting rod 321 of the first rotating portion 320a, or the second sub-portion 3119 can be connected to the first connecting rod 321 of the first rotating portion 320a via a threaded fastener such as a bolt. Similarly, the first sub-portion 3129 can be bonded to the second connecting rod 322 of the first rotating portion 320a, or the first sub-portion 3129 can also be connected to the second connecting rod 322 of the first rotating portion 320a by threaded fasteners such as bolts.

[0117] Through the above arrangement, when the first structural member 21 drives the bracket 324 of the first rotating part 320a to rotate, the bracket 324 of the first rotating part 320a can drive the second connecting rod 322 of the first rotating part 320a to rotate relative to the main shaft 100, so that the first sub-part 3129 can rotate relative to the main shaft 100, and the second connecting rod 322 of the first rotating part 320a can drive the first connecting rod 321 of the first rotating part 320a to rotate relative to the main shaft 100, so that the second sub-part 3119 can rotate relative to the main shaft 100.

[0118] In some other embodiments, the second sub-section 3119 can be movably connected to the first connecting rod 321 of the first rotating section 320a, and the first sub-section 3129 can be movably connected to the second connecting rod 322 of the first rotating section 320a. For example, the second sub-section 3119 can be rotatably connected to the first connecting rod 321 of the first rotating section 320a, so that the second sub-section 3119 can rotate relative to the first connecting rod 321 of the first rotating section 320a, and the first sub-section 3129 can be rotatably connected to the second connecting rod 322 of the first rotating section 320a, so that the first sub-section 3129 can rotate relative to the second connecting rod 322 of the first rotating section 320a. The embodiments of the present application do not specifically limit the connection method between the second sub-section 3119 and the first connecting rod 321 of the first rotating section 320a, and the embodiments of the present application do not specifically limit the connection method between the first sub-section 3129 and the second connecting rod 322 of the first rotating section 320a.

[0119] The movement principle of the structural components within the second rotating portion 320b can be the same as the movement principle of the structural components within the first rotating portion 320a. Furthermore, the relevant structures of the second rotating portion 320b can also be the same as the relevant structures of the first rotating portion 320a. For example, the second rotating portion 320b can also include a first connecting rod 321 and a second connecting rod 322. In the second rotating portion 320b, the first end 321a of the first connecting rod is rotatably connected to the main shaft 100, the second end 321b of the first connecting rod is rotatably connected to the first end 322a of the second connecting rod, and the second end 322b of the second connecting rod is rotatably connected to the bracket 324 of the second rotating portion 320b. The rotation axis of the second connecting rod 322 relative to the first connecting rod 321 is parallel to the first direction X, the rotation axis of the bracket 324 of the second rotating portion 320b relative to the second connecting rod 322 is parallel to the first direction X, and the rotation axis of the first connecting rod 321 relative to the main shaft 100 is parallel to the first direction X. Through the above-mentioned setting, in the second rotating part 320b, the bracket 324 can rotate relative to the second connecting rod 322 along the rotation axis parallel to the first direction X, the second connecting rod 322 can rotate relative to the first connecting rod 321 along the rotation axis parallel to the first direction X, and the first connecting rod 321 can rotate relative to the main shaft 100 along the rotation axis parallel to the first direction X.

[0120] Based on the above structure, the first portion 311 of the second supporting door panel 310b can be connected to the first connecting rod 321 of the second rotating portion 320b, that is, the third sub-portion 3118 can be connected to the first connecting rod 321 of the second rotating portion 320b; the second portion 312 of the second supporting door panel 310b can be connected to the second connecting rod 322 of the second rotating portion 320b, that is, the fourth sub-portion 3128 can be connected to the second connecting rod 322 of the second rotating portion 320b. In some embodiments, the second sub-portion 3119 can be fixedly connected to the first connecting rod 321 of the second rotating portion 320b, and the first sub-portion 3129 can be fixedly connected to the second connecting rod 322 of the second rotating portion 320b. For example, the third sub-portion 3118 can be bonded to the first connecting rod 321 of the second rotating portion 320b, or the third sub-portion 3118 can be connected to the first connecting rod 321 of the second rotating portion 320b via a threaded fastener such as a bolt. Similarly, the fourth sub-portion 3128 may be bonded to the second connecting rod 322 of the second rotating portion 320 b , or the fourth sub-portion 3128 may be connected to the second connecting rod 322 of the second rotating portion 320 b via threaded fasteners such as bolts.

[0121] Through the above arrangement, when the second structural member 22 drives the bracket 324 of the second rotating part 320b to rotate, the bracket 324 of the second rotating part 320b can drive the second connecting rod 322 of the second rotating part 320b to rotate relative to the main shaft 100, so that the fourth sub-part 3128 can rotate relative to the main shaft 100, and the second connecting rod 322 of the second rotating part 320b can drive the first connecting rod 321 of the second rotating part 320b to rotate relative to the main shaft 100, so that the third sub-part 3118 can rotate relative to the main shaft 100.

[0122] When the shaft assembly 300 is in the flat state, the first connecting rod 321 of the first rotating portion 320a can rotate to be flush with the second connecting rod 322 of the first rotating portion 320a, so that the first sub-portion 3129 and the second sub-portion 3119 are flush. The first connecting rod 321 of the second rotating portion 320b can rotate to be flush with the second connecting rod 322 of the second rotating portion 320b, so that the third sub-portion 3118 and the fourth sub-portion 3128 are flush. With the above arrangement, the first sub-portion 3129, the second sub-portion 3119, the third sub-portion 3118, and the fourth sub-portion 3128 can form a portion of the support plane N.

[0123] When the rotating shaft assembly 300 is in a folded state, the first connecting rod 321 of the first rotating part 320a can be rotated to a certain angle relative to the main shaft 100, the second connecting rod 322 of the first rotating part 320a can be rotated to a certain angle relative to the main shaft 100, and the first connecting rod 321 of the second rotating part 320b can be rotated to a certain angle relative to the main shaft 100, and the second connecting rod 322 of the second rotating part 320b can be rotated to a certain angle relative to the main shaft 100. In the second direction Y, the distance between the first end 3129a of the first sub-section and the first end 3128a of the fourth sub-section is greater than the distance between the second end 3129b of the first sub-section and the second end 3128b of the fourth sub-section. In the second direction Y, the distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section is less than the distance between the second end 3119b of the second sub-section and the second end 3118b of the third sub-section. The distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section increases along the second direction Y. Through the above arrangement, the flexible screen 30 can be bent into a teardrop shape or a near teardrop shape within the screen-accommodating space M enclosed by the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, the fourth sub-section 3128, and the main shaft 100, thereby avoiding excessive compression on the flexible screen 30 and reducing stress on the flexible screen 30.

[0124] FIG11a is a structural diagram of a spindle 100 provided in an embodiment of the present application, and FIG11b is a structural diagram of a support and fitting portion of a spindle provided in an embodiment of the present application. Referring to FIG11a and FIG11b, the spindle 100 may include a first arcuate slot 102. Exemplarily, the support and fitting portion 100a may include a mounting groove 110, the mounting groove 110 including two sidewalls 111 arranged along a first direction X, and each sidewall 111 protruding outwardly with a contact block 113, the surface of the contact block 113 facing the bottom 112 of the mounting groove being an arcuate surface, and accordingly, the bottom 112 of the mounting groove may be an arcuate surface that cooperates with the contact block 113. Through the above arrangement, the bottom 112 of the mounting groove and the sidewalls 111 of the mounting groove jointly enclose two first arcuate slots 102 arranged opposite to each other along the first direction X, and the two first arcuate slots 102 arranged along the first direction X are used to be rotatably connected to the same first connecting rod 321. Furthermore, the sidewall 111 of each mounting groove has two contact blocks 113 spaced apart along the second direction Y. Through this arrangement, the groove bottom 112 of the mounting groove and the contact blocks 113 together enclose four first arcuate chute grooves 102. Two first arcuate chute grooves 102 arranged along the first direction X constitute a first chute pair, and two first chute pairs arranged along the second direction Y are spaced apart.

[0125] FIG12 is a structural diagram of a first connecting rod 321 provided in an embodiment of the present application. In some embodiments, the first connecting rod 321 of the second rotating portion 320b can have the same shape as the first connecting rod 321 of the first rotating portion 320a. Alternatively, in some embodiments, the first connecting rod 321 of the second rotating portion 320b can also have a different shape and structure from the first connecting rod 321 of the first rotating portion 320a, so that the first connecting rod 321 of the second rotating portion 320b can be rotatably connected to the main shaft 100 of the second rotating portion 320b and the second connecting rod 322 of the second rotating portion 320b, respectively, and the first connecting rod 321 of the first rotating portion 320a can be rotatably connected to the main shaft 100 of the first rotating portion 320a and the second connecting rod 322 of the first rotating portion 320a, respectively.

[0126] The structure of the first connecting rod 321 of the first rotating portion 320 a will be described below by taking the first rotating portion 320 a as an example.

[0127] 12 (a) is a structural diagram of the first connecting rod 321 from one perspective, and FIG12 (b) is a structural diagram of the first connecting rod 321 from another perspective. Referring to FIG12 , the first end 321a of the first connecting rod may include a first curved slider 3212. The first connecting rod 321 may also include a first body 3211. The first curved slider 3212 is connected to the first body 3211, and the first curved slider 3212 is slidably connected to the first curved slot 102. For example, the first body 3211 is generally cylindrical in structure. The surface of the first body 3211 close to the spindle 100 may include a first mating surface 3211b. The first mating surface 3211b is an arcuate surface that mates with the bottom 112 of the mounting slot. The surface of the first connecting rod 321 away from the spindle 100 along the third direction Z may include a first mounting surface 3211a. The first mounting surface 3211a is configured to connect to the first portion 311. Illustratively, the first mounting surface 3211 a may be a plane, so that the plane is connected to the first portion 311 .

[0128] Furthermore, there can be two first curved sliders 3212, each connected to two surfaces of the first body 3211 along the first direction X. This arrangement allows the first connecting rod 321 to be installed within the mounting slot 110 of the spindle 100 and to be rotationally connected to the spindle 100 via a virtual axis. Furthermore, the two first curved sliders 3212 located on either side of the first body 3211 along the first direction X facilitates more compact assembly of the first connecting rod 321 and the spindle 100, thereby reducing the size of the rotating mechanism.

[0129] To sum up, in combination with Figures 10, 11a, 11b and 12, the first connecting rod 321 and the main shaft 100 are rotationally connected through the first arc-shaped slider 3212 and the first arc-shaped groove 102, and the first connecting rod 321 and the main shaft 100 are rotationally connected through a virtual axis connection. When the first arc-shaped slider 3212 slides along the first arc-shaped groove 102, the first connecting rod 321 can rotate relative to the main shaft 100.

[0130] When the two rotating shaft assemblies 300 are converted from a folded state to a flat state, the first curved slider 3212 slides in the first curved slot 102 toward the direction close to the inside of the mounting slot 110 (for example, the first curved slider 3212 of the first connecting rod 321 of the first rotating part 320a slides toward the direction a1 in Figure 11b, and the first curved slider 3212 of the first connecting rod 321 of the second rotating part 320b slides toward the direction a3 in Figure 11b), the first curved slider 3212 slides into the first curved slot 102, and the part of the first curved slider 3212 located in the first curved slot 102 gradually becomes larger, so that the first ends 321a of the two first connecting rods 321 are close to each other, and then the first end 3119a of the second sub-part and the first end 3118a of the third sub-part are close to each other, which is beneficial to improve the support effect on the flexible screen 30.

[0131] When the two rotating shaft assemblies 300 are transformed from the flat state to the folded state, the first arc-shaped slider 3212 slides in the first arc-shaped slide groove 102 toward the edge of the mounting groove 110 (for example, the first arc-shaped slider 3212 of the first connecting rod 321 of the first rotating portion 320a slides toward the direction a2 in FIG. 11b , and the first arc-shaped slider 3212 of the first connecting rod 321 of the second rotating portion 320b slides toward the direction a4 in FIG. 11b ). 02 slides out, the part of the first arc-shaped slider 3212 located in the first arc-shaped slide groove 102 gradually becomes smaller, so that the first ends 321a of the two first connecting rods 321 are separated from each other, and then the first end 3119a of the second sub-section and the first end 3118a of the third sub-section are separated from each other, which is conducive to further increasing the screen-holding space M surrounded by the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, the fourth sub-section 3128 and the main shaft 100, thereby further improving the reliability of the flexible screen 30.

[0132] In addition, in some other embodiments, the main shaft 100 may include a first arc-shaped slider 3212, and the first end 321a of the first connecting rod may include a first arc-shaped groove 102, so that the first connecting rod 321 and the main shaft 100 are rotatably connected through the first arc-shaped slider 3212 and the first arc-shaped groove 102.

[0133] FIG13 is a structural diagram of a second connecting rod 322 provided in an embodiment of the present application. In some embodiments, the second connecting rod 322 of the second rotating portion 320b can have the same shape as the second connecting rod 322 of the first rotating portion 320a. Alternatively, in some embodiments, the second connecting rod 322 of the second rotating portion 320b can also differ from the second connecting rod 322 of the first rotating portion 320a in shape and structure, so that the second connecting rod 322 of the second rotating portion 320b can be rotatably connected to the first connecting rod 321 of the second rotating portion 320b and the bracket 324 of the second rotating portion 320b, respectively, and the second connecting rod 322 of the first rotating portion 320a can be rotatably connected to the first connecting rod 321 of the first rotating portion 320a and the bracket 324 of the first rotating portion 320a, respectively.

[0134] The structure of the second connecting rod 322 of the first rotating portion 320 a will be described below by taking the first rotating portion 320 a as an example.

[0135] 13 , the first end 322a of the second connecting rod may include a second connecting hole 3225. For example, the second connecting rod 322 may include a second body 3221. The second body 3221 may be substantially flat, so that the second portion 312 is connected to the second body 3221. The second connecting hole 3225 is provided through the second body 3221, and the central axis of the second connecting hole 3225 is parallel to the first direction X.

[0136] Accordingly, in conjunction with Figures 12 and 10 , the second end 321b of the first connecting rod may include a first connecting hole 3213, the central axis of which is parallel to the first direction X. The second end 321b of the first connecting rod may be located on a side of the first body 3211 proximal to the second connecting rod 322, such that the second end 321b of the first connecting rod is rotatably connected to the second connecting rod 322. For example, the first connecting hole 3213 may be provided through the first body 3211. A pin may be provided through the first connecting hole 3213 and the second connecting hole 3225 to rotatably connect the first end 322a of the second connecting rod to the second end 321b of the first connecting rod. The first body 3211 and the second body 3221 are rotatably connected via the rotation of a physical axis, which facilitates improving the rotational accuracy and connection reliability between the first body 3211 and the second body 3221.

[0137] 13 , the second end 322b of the second connecting rod may further include a second curved slider 3223, and the second body 3221 is connected to the second curved slider 3223. For example, the second connecting rod 322 may include two second curved sliders 3223 arranged along the first direction X, and the two second curved sliders 3223 are respectively connected to the two sides of the second body 3221.

[0138] Figure 14 is a structural diagram of a bracket 324 provided in an embodiment of the present application. Among them, (a) in Figure 14 is a structural diagram of the bracket 324 from one perspective, and (b) in Figure 14 is a structural diagram of the bracket 324 from another perspective. Referring to Figure 14, the bracket 324 may include a second arc-shaped slide 3241, and the second arc-shaped slider 3223 is slidably connected to the second arc-shaped slide 3241. Exemplarily, the bracket 324 may include two second arc-shaped slides 3241, and a second arc-shaped slider 3223 of the second connecting rod 322 may be slidably connected to a second arc-shaped slide 3241 of the bracket 324. Through the above-mentioned arrangement, the second connecting rod 322 and the bracket 324 are connected by the second arc-shaped slider 3223 and the second arc-shaped slide 3241, so that the second connecting rod 322 is rotatably connected to the bracket 324 through a virtual axis connection.

[0139] Furthermore, the second connecting rod 322 and the bracket 324 are connected through a virtual axis so that the rotation axis of the second connecting rod 322 relative to the bracket 324 can be closer to the flexible screen 30, avoiding pulling the flexible screen 30 during the rotation of the hinge assembly 300, which is beneficial to improving the reliability of the flexible screen 30.

[0140] In addition, in some other embodiments, the second end 322b of the second connecting rod may include a second arc-shaped slide groove 3241, and the bracket 324 may include a second arc-shaped slider 3223, so that the second connecting rod 322 and the bracket 324 pass through the second arc-shaped slider 3223 and the second arc-shaped slide groove 3241.

[0141] In some embodiments, the first connecting rod 321 and the second connecting rod 322 can participate in the main movement of the rotating shaft assembly 300 to drive the rotating shaft assembly 300 to rotate relative to the main shaft 100 .

[0142] Figure 15 is a structural diagram of a third connecting rod 323 provided in an embodiment of the present application. In conjunction with Figures 10 and 15 , in some embodiments, the first rotating portion 320a may further include a third connecting rod 323. The third connecting rod 323 and the second connecting rod 322 may be arranged sequentially along the first direction X, which helps reduce the thickness of the first rotating portion 320a and, in turn, facilitates achieving a thinner and lighter foldable electronic device. In the first rotating portion 320a, the first end 323a of the third connecting rod is rotatably connected to the first connecting rod 321, and the second end 323b of the third connecting rod is rotatably connected to the bracket 324 of the first rotating portion 320a.

[0143] The movement principle of the structural components within the second rotating portion 320b can be the same as the movement principle of the structural components within the first rotating portion 320a. Furthermore, the relevant structure of the second rotating portion 320b can also be the same as the relevant structure of the first rotating portion 320a. For example, the second rotating portion 320b can also include a third connecting rod 323. In the second rotating portion 320b, the first end 323a of the third connecting rod is rotatably connected to the first connecting rod 321, and the second end 323b of the third connecting rod is rotatably connected to the bracket 324 of the second rotating portion 320b.

[0144] In some embodiments, the third connecting rod 323 of the second rotating portion 320b can have the same shape as the third connecting rod 323 of the first rotating portion 320a. Alternatively, in some embodiments, the third connecting rod 323 of the second rotating portion 320b can also have a different shape and structure from the third connecting rod 323 of the first rotating portion 320a, so that the third connecting rod 323 of the second rotating portion 320b can be rotatably connected to the first connecting rod 321 of the second rotating portion 320b and the bracket 324 of the second rotating portion 320b, respectively, and the third connecting rod 323 of the first rotating portion 320a can be rotatably connected to the first connecting rod 321 of the first rotating portion 320a and the bracket 324 of the first rotating portion 320a, respectively.

[0145] The structure of the third connecting rod 323 of the first rotating portion 320 a will be described below by taking the first rotating portion 320 a as an example.

[0146] As shown in Figures 12 to 15 , the rotation axis of the third link 323 relative to the first link 321 is the first axis s1. In conjunction with Figure 10 , the first axis s1 is parallel to the first direction X. The rotation axis of the third link 323 relative to the bracket 324 is the third axis s3, which is parallel to the first direction X. The rotation axis of the second link 322 relative to the bracket 324 is the fourth axis s4, and the rotation axis of the second link 322 relative to the first link 321 is the second axis s2. As described in the above embodiment, the second axis s2 and the fourth axis s4 are both parallel to the first direction X.

[0147] The second end 323b of the third connecting rod may include a third connecting hole 3233. Exemplarily, the third connecting rod 323 may include a third body 3231, which may be generally plate-shaped. The third connecting hole 3233 is disposed throughout the third body 3231, with the axis of the third connecting hole 3233 parallel to the first direction X. Accordingly, with reference to FIG14 , the bracket 324 may include a bracket connecting hole 3242, with the central axis of the bracket connecting hole 3242 parallel to the first direction X. A pin may be disposed within the third connecting hole 3233 and the bracket connecting hole 3242, so that the third body 3231 and the bracket 324 are rotatably connected via the rotation of a physical axis.

[0148] It is understandable that the virtual axis rotation requires the provision of a matching arc-shaped slot and arc-shaped slider, which in turn takes up a considerable amount of space. Rotating the third connecting rod 323 and the bracket 324 via a physical axis connection helps reduce the size of the bracket 324 and improve the connection reliability between the third connecting rod 323 and the bracket 324.

[0149] The first end 323a of the third connecting rod may include a third curved slider 3232, which is connected to the third body 3231. Exemplarily, the third connecting rod 323 may include two third curved sliders 3232 arranged along the first direction X, and the two third curved sliders 3232 are respectively connected to the sides of the third body 3231. With reference to FIG12 , the first connecting rod 321 may include a third curved slot 3214, and the third curved slider 3232 is slidably connected to the third curved slot 3214. Exemplarily, the first connecting rod 321 may include two third curved slots 3214, and one third curved slider 3232 of the third connecting rod 323 may be slidably connected to one third curved slot 3214 of the first connecting rod 321. Through the above arrangement, the third connecting rod 323 is rotatably connected to the first connecting rod 321 via the third arc-shaped slider 3232 and the third arc-shaped slot 3214 , so that the third connecting rod 323 is rotatably connected to the first connecting rod 321 via a virtual axis connection.

[0150] Alternatively, in some other embodiments, the first end 323a of the third connecting rod may include a third arc-shaped slide groove 3214, and the first connecting rod 321 may include a third arc-shaped slider 3232, so that the third connecting rod 323 is rotatably connected to the first connecting rod 321 through the third arc-shaped slider 3232 and the third arc-shaped slide groove 3214.

[0151] Furthermore, the third connecting rod 323 and the first connecting rod 321 are connected via a virtual axis so that the rotation axis of the third connecting rod 323 relative to the first connecting rod 321 can be further away from the flexible screen 30. FIG16 is a partial cross-sectional view of a rotating mechanism 10 provided in an embodiment of the present application in a flat state; FIG17 is a partial cross-sectional view of a rotating mechanism 10 provided in an embodiment of the present application in a folded state.

[0152] Referring to Figure 16 , when the two hinge assemblies 300 are flat, the distance between the second axis s2 and the reference plane F in the third direction Z is greater than the distance between the first axis s1 and the reference plane F in the third direction Z. The reference plane F is parallel to the first direction X and the second direction Y. The exterior surface E intersects the reference plane F at its point farthest from the support plane along the third direction Z (e.g., point K in Figure 16 ). This arrangement prevents the third connecting rod 323 from pushing against the flexible screen 30 when the two hinge assemblies 300 are flat, thereby improving the flatness of the flexible screen 30.

[0153] Based on the above structure, when the two rotating shaft assemblies 300 are in a flat state, the distance between the fourth axis s4 and the reference plane F in the third direction Z is greater than the distance between the third axis s3 and the reference plane F in the third direction Z. Through the above arrangement, in the same rotating portion 320, the first connecting rod 321, the second connecting rod 322, the third connecting rod 323, and the bracket 324 can collectively form a four-bar linkage. The four-bar linkage can function as a primary motion and can drive the motion of other mechanisms connected between the bracket 324 and the main shaft 100.

[0154] Exemplarily, the rotation axis of the first connecting rod 321 relative to the main shaft 100 is the rotation axis of the entire four-bar linkage. The rotation axes of the two first connecting rods 321 relative to the main shaft 100 do not overlap. For example, the rotation axis of the first connecting rod 321 of the first rotating portion 320a relative to the main shaft 100 can be rotation axis O1, and the rotation axis of the first connecting rod 321 of the second rotating portion 320b relative to the main shaft 100 can be rotation axis O1. The following description only uses the four-bar linkage mechanism as an example in which the rotation axis is rotation axis O2 (i.e., the second rotating portion 320b is used as an example).

[0155] When the hinge assembly 300 transitions from the folded state to the unfolded state, the four-bar linkage rotates as a whole about the rotation axis O2, bringing the opposing ends of the two first links 321 closer together. Simultaneously, during the overall movement of the four-bar linkage, the second link 322 rotates relative to the first link 321, and the third link 323 rotates relative to the first link 321, so that at least portions of the first link 321 and the second link 322 are aligned.

[0156] When the hinge assembly 300 transitions from the flat state to the folded state, the four-bar linkage rotates as a whole about the rotation axis O2, causing the two first links 321 to rotate relative to the main axis. Simultaneously, during the overall movement of the four-bar linkage, the second link 322 within the linkage rotates relative to the first link 321 about the second axis s2, and the third link 323 rotates relative to the first link 321 about the first axis s1, thereby creating a certain bending angle between the first link 321 and the second link 322. In the second direction Y, the spacing between the first ends 321a of the two first links 321 is smaller than the spacing between the second ends 321b of the two first links 321, and the spacing between the first ends 322a of the two second links 322 is larger than the spacing between the second ends 322b of the two second links 322.

[0157] In some other embodiments, the first connecting rod 321 and the second connecting rod 322 may not participate in the main motion of the shaft assembly 300, and the shaft assembly 300 may rotate under the drive of other main motion structures. In actual use, different main motion structures can be set in the rotation mechanism 10 according to different needs.

[0158] The following describes other main motion structures using the rotation module 400 located at an edge position in Figure 18 as an example. It should be noted that the main motion structure shown in Figure 18 can also be applied to rotation modules 400 at other positions, for example, a rotation module 400 at a middle position and a rotation module 400 at another edge position.

[0159] FIG18 is an exploded view of the structure of another rotation module 400 provided in an embodiment of the present application. FIG18 provides the structure of the first connecting rod 321 and the second connecting rod 322 in another embodiment. For example, the first connecting rod 321 and the second connecting rod 322 in FIG18 may not be exactly the same as the first connecting rod 321 and the second connecting rod 322 in FIG10 . For example, the length of the first connecting rod 321 in FIG18 in the first direction X is shorter, and the width of the second connecting rod 322 in FIG18 in the second direction Y is increased. Of course, the first connecting rod 321 and the second connecting rod 322 in the embodiment of the present application are not limited to the above two structures, and it is sufficient to realize the rotational connection between the first connecting rod 321 and the main shaft 100, the first connecting rod 321 and the second connecting rod 322, and the second connecting rod 322 and the bracket 324.

[0160] FIG19 is a structural diagram of a fourth connecting rod 325 provided in an embodiment of the present application. Referring to FIG19 , in some embodiments, the first rotating portion 320a may further include a fourth connecting rod 325. Within the first rotating portion 320a, a first end 325a of the fourth connecting rod may be rotatably connected to the main shaft 100, and a second end 325b of the fourth connecting rod may be rotatably connected to a bracket 324 of the first rotating portion 320a. The rotational axis of the bracket 324 of the first rotating portion 320a relative to the fourth connecting rod 325 and the rotational axis of the fourth connecting rod 325 relative to the main shaft 100 are both parallel to the first direction X.

[0161] The movement principle of the structural components within the second rotating portion 320b can be the same as the movement principle of the structural components within the first rotating portion 320a. In addition, the relevant structure of the second rotating portion 320b can also be the same as the relevant structure of the first rotating portion 320a. For example, the second rotating portion 320b can also include a fourth connecting rod 325. In the second rotating portion 320b, the first end 325a of the fourth connecting rod can be rotatably connected to the main shaft 100, and the second end 325b of the fourth connecting rod is rotatably connected to the bracket 324 of the second rotating portion 320b. The rotation axis of the bracket 324 of the second rotating portion 320b relative to the fourth connecting rod 325 and the rotation axis of the fourth connecting rod 325 relative to the main shaft 100 are both parallel to the first direction X.

[0162] In some embodiments, the fourth connecting rod 325 of the second rotating portion 320b can have the same shape as the fourth connecting rod 325 of the first rotating portion 320a. Alternatively, in some embodiments, the fourth connecting rod 325 of the second rotating portion 320b can also have a different shape and structure from the fourth connecting rod 325 of the first rotating portion 320a, so that the fourth connecting rod 325 of the second rotating portion 320b can be rotatably connected to the main shaft 100 and the bracket 324 of the second rotating portion 320b, respectively, and the fourth connecting rod 325 of the first rotating portion 320a can be rotatably connected to the main shaft 100 and the bracket 324 of the first rotating portion 320a, respectively.

[0163] The structure of the fourth connecting rod 325 of the first rotating portion 320 a will be described below by taking the first rotating portion 320 a as an example.

[0164] As shown in FIG18 , the rotation axis of the first connecting rod 321 relative to the main shaft 100 may be the fifth axis s5, and the rotation axis of the fourth connecting rod 325 relative to the main shaft 100 may be the sixth axis s6. The present embodiment does not specifically limit the relative positional relationship between the fifth axis s5 and the sixth axis s6. For example, the fifth axis s5 may coincide with the sixth axis s6, or the fifth axis s5 may be spaced apart from the sixth axis s6.

[0165] As shown in Figure 18 , the rotation axis of the bracket 324 of the first rotating portion 320a relative to the fourth connecting rod 325 can be the seventh axis s7. Similarly, the present embodiment does not specifically limit the relative positional relationship between the seventh axis s7 and the fourth axis s4. For example, the seventh axis s7 can coincide with the fourth axis s4, or the seventh axis s7 can be spaced apart from the fourth axis s4. The provision of the fourth connecting rod 325 further improves the connection reliability between the bracket 324 and the main shaft 100.

[0166] The second end 325b of the fourth connecting rod may include a fourth connecting hole 3253. Exemplarily, the fourth connecting rod 325 may include a fourth main body 3251, which may be generally plate-shaped, and the fourth connecting hole 3253 may be disposed through the fourth main body 3251. Accordingly, as shown in FIG18 , the bracket 324 may further include a bracket connecting hole 3242, and a pin may be disposed within the fourth connecting hole 3253 and the bracket connecting hole 3242. Through the above arrangement, the second end 325b of the fourth connecting rod may be rotatably connected to the bracket 324, and the fourth main body 3251 and the bracket 324 may be rotatably connected via a physical shaft connection. As described in the above embodiment, rotatably connecting the fourth connecting rod 325 and the bracket 324 via a physical shaft connection helps reduce the volume of the bracket 324 and improve the reliability of the connection between the fourth connecting rod 325 and the bracket 324.

[0167] The first end 325a of the fourth connecting rod may include a fourth curved slider 3252, which may be connected to the fourth body 3251. Figure 20 is a structural diagram of another support and mating portion 100a of the main shaft 100 provided in an embodiment of the present application. The main shaft 100 also includes a fourth curved chute 103, with the fourth curved slider 3252 being slidably connected to the fourth curved chute 103. Exemplarily, the support and mating portion 100a may include at least two mounting grooves 110, at least one of which is configured to be rotatably connected to the first connecting rod 321, and at least one of which is configured to be rotatably connected to the fourth connecting rod 325. As described in the above embodiment, the groove bottom 112 and the contact block 113 of the mounting groove jointly enclose two fourth curved chute 103 disposed opposite each other along the first direction X, and the two fourth curved chute 103 disposed opposite each other along the first direction X are configured to be rotatably connected to the same fourth connecting rod 325. Furthermore, the sidewall 111 of each mounting groove has two contact blocks 113 spaced apart along the second direction Y. Through this arrangement, the groove bottom 112 of the mounting groove and the sidewall 111 of the mounting groove together enclose four fourth arcuate sliding grooves 103. Two fourth arcuate sliding grooves 103 arranged opposite each other along the first direction X constitute a fourth sliding groove pair, and two fourth sliding groove pairs arranged along the second direction Y are spaced apart.

[0168] Through the above-mentioned setting, the first end 325a of the fourth connecting rod and the main shaft 100 are rotationally connected through the fourth arc-shaped slider 3252 and the fourth arc-shaped groove 103. When the fourth connecting rod 325 and the main shaft 100 are rotationally connected through the connection method of the virtual axis, the fourth arc-shaped slider 3252 slides along the fourth arc-shaped groove 103, and the fourth connecting rod 325 can rotate relative to the main shaft 100.

[0169] When the two rotating shaft assemblies 300 are converted from a folded state to a flat state, the fourth arc-shaped slider 3252 slides in the fourth arc-shaped slot 103 toward the direction close to the inside of the mounting slot 110 (for example, the fourth arc-shaped slider 3252 of the fourth connecting rod 325 of the first rotating part 320a slides toward the direction b1 in Figure 20, and the fourth arc-shaped slider 3252 of the fourth connecting rod 325 of the second rotating part 320b slides toward the direction b3 in Figure 20), and the fourth arc-shaped slider 3252 slides into the fourth arc-shaped slot 103, and the part of the fourth arc-shaped slider 3252 located in the fourth arc-shaped slot 103 gradually becomes larger, so that the first ends 325a of the two fourth connecting rods are close to each other, which is beneficial to improve the support effect on the flexible screen 30.

[0170] When the two rotating shaft assemblies 300 are converted from the flat state to the folded state, the fourth arc-shaped slider 3252 slides in the fourth arc-shaped slot 103 toward the edge of the mounting slot 110 (for example, the fourth arc-shaped slider 3252 of the fourth connecting rod 325 of the first rotating part 320a slides toward the b2 direction in Figure 20, and the fourth arc-shaped slider 3252 of the fourth connecting rod 325 of the second rotating part 320b slides toward the b4 direction in Figure 20), and the fourth arc-shaped slider 3252 slides out of the fourth arc-shaped slot 103. The part of the fourth arc-shaped slider 3252 located in the fourth arc-shaped slot 103 gradually decreases, so that the first ends 325a of the two fourth connecting rods move away from each other, which is conducive to further increasing the screen-capacity space enclosed by the first sub-part 3129, the second sub-part 3119, the third sub-part 3118, the fourth sub-part 3128 and the main shaft 100, thereby further improving the reliability of the flexible screen 30.

[0171] Alternatively, in some other embodiments, the first end 325a of the fourth connecting rod may include a fourth arc-shaped groove 103, the main shaft 100 may include a fourth arc-shaped slider 3252, and the first end 325a of the fourth connecting rod and the main shaft 100 are rotatably connected through the fourth arc-shaped slider 3252 and the fourth arc-shaped groove 103.

[0172] FIG21 is a structural diagram of a rocker arm 510 provided in an embodiment of the present application. Based on the above structure, referring to FIG21 in conjunction with FIG18 , the first rotating portion 320a may further include a rocker arm 510. In the first rotating portion 320a, a first end 510a of the rocker arm is rotatably connected to the main shaft 100, and the rotation axis of the rocker arm 510 relative to the main shaft 100 is parallel to the first direction X. A second end 510b of the rocker arm is slidably connected to the bracket 324, and the sliding direction of the rocker arm 510 relative to the bracket 324 is not parallel to the longitudinal extension direction of the bracket 324.

[0173] The movement principle of the structural components within the second rotating portion 320b can be the same as the movement principle of the structural components within the first rotating portion 320a. Furthermore, the relevant structures of the second rotating portion 320b can also be the same as the relevant structures of the first rotating portion 320a. For example, the second rotating portion 320b can also include a rocker arm 510. In the second rotating portion 320b, the first end 510a of the rocker arm is rotatably connected to the main shaft 100, and the rotation axis of the rocker arm 510 relative to the main shaft 100 is parallel to the first direction X. The second end 510b of the rocker arm is slidably connected to the bracket 324, and the sliding direction of the rocker arm 510 relative to the bracket 324 is not parallel to the longitudinal extension direction of the bracket 324.

[0174] In some embodiments, the swing rod 510 of the second rotating portion 320b may have the same shape as the swing rod 510 of the first rotating portion 320a. Alternatively, in some embodiments, the swing rod 510 of the second rotating portion 320b may have a different shape and structure from the swing rod 510 of the first rotating portion 320a, so that the swing rod 510 of the second rotating portion 320b is rotatably connected to the main shaft 100 and the swing rod 510 of the second rotating portion 320b is slidably connected to the bracket 324 of the second rotating portion 320b, while the swing rod 510 of the first rotating portion 320a is rotatably connected to the main shaft 100 and the swing rod 510 of the first rotating portion 320a is slidably connected to the bracket 324 of the first rotating portion 320a.

[0175] The structure of the fourth connecting rod 325 of the first rotating portion 320 a will be described below by taking the first rotating portion 320 a as an example.

[0176] In some embodiments, the second end 510b of the rocker arm may include a rocker arm connection hole 512. For example, as shown in FIG18 , the rocker arm 510 may include a rocker arm body 511, and the rocker arm connection hole 512 may be provided through the rocker arm body 511. Accordingly, the main shaft 100 may have a main shaft connection hole 121 that passes through the main shaft 100 along the first direction X. A pin may be provided in the main shaft connection hole 121 and the rocker arm connection hole 512 so that the rocker arm body 511 and the main shaft 100 are rotatably connected via the pin. Through the above arrangement, the rocker arm body 511 and the main shaft 100 can be rotatably connected via a physical shaft connection, which is beneficial to improving the connection reliability and rotation accuracy between the rocker arm body 511 and the main shaft 100.

[0177] Based on the above structure, as shown in conjunction with Figures 18 and 21, the first end 510a of the rocker arm may include a rocker arm slider 513, which may be connected to the rocker arm body 511. The bracket 324 may include a bracket slot 3245, and the rocker arm slider 513 is slidably connected to the bracket slot 3245. Exemplarily, the extension direction of the bracket slot 3245 may be perpendicular to the extension direction of the bracket 324. The slider slides within the bracket slot 3245 to enable the rocker arm 510 to be slidably connected to the bracket 324.

[0178] FIG22 is a partial cross-sectional view of another rotating mechanism 10 provided in an embodiment of the present application in a flat state; FIG23 is a partial cross-sectional view of another rotating mechanism 10 provided in an embodiment of the present application in a folded state. Referring to FIG22 and FIG23, during the transition of the two rotating shaft assemblies 300 from the flat state to the folded state, the bracket 324 of the first rotating portion 320a slides relative to the swing rod 510 of the first rotating portion 320a in a direction away from the main shaft 100, and the bracket 324 of the second rotating portion 320b slides relative to the swing rod 510 of the second rotating portion 320b in a direction away from the main shaft 100; during the transition of the two rotating shaft assemblies 300 from the folded state to the flat state, the bracket 324 of the first rotating portion 320a slides relative to the swing rod 510 of the first rotating portion 320a in a direction toward the main shaft 100, and the bracket 324 of the second rotating portion 320b slides relative to the swing rod 510 of the second rotating portion 320b in a direction toward the main shaft 100. The above setting is helpful to adjust the length between the two brackets 324. During the folding or unfolding process of the two rotating shaft assemblies 300, it is helpful to ensure that the length of the flexible screen 30 does not change, and improve the squeezing or stretching of the flexible screen 30 by the rotating mechanism 10.

[0179] As shown in Figure 10, when the two rocker arms 510 cooperate with the first link 321, the second link 322 and the third link 323 in the above embodiment, the rocker arms 510 are conducive to further constraining the freedom of movement of the above four-bar linkage mechanism, which is conducive to improving the movement accuracy of the above four-bar linkage mechanism.

[0180] As can be understood from Figures 22 and 23 , during the transition between the two hinge assemblies 300 from the flat state to the folded state, the bracket 324 of the first rotating portion 320a can slide relative to the rocker 510 of the first rotating portion 320a in a direction away from the main shaft 100, and the bracket 324 of the second rotating portion 320b can slide relative to the rocker 510 of the second rotating portion 320b in a direction away from the main shaft 100. This ensures that a certain distance exists between the flexible screen 30 and the main shaft 100 when the two hinge assemblies 300 are in the folded state. The back cover 101 is located on the side of the main shaft 100 away from the flexible screen 30. The back cover 101 is provided with two flanges 1013 along the second direction Y, and the two flanges 1013 are located on either side of the flexible screen 30 along the second direction Y. The flanges 1013 of the back cover 101 can partially shield the flexible screen 30 along the second direction Y, thereby providing protection for the flexible screen 30.

[0181] In summary, when the two hinge assemblies 300 are in the folded state, the distance between the first ends 321a of the two first connecting rods in the second direction Y increases, thereby increasing the screen space M. Accordingly, during the transition between the flat and folded states, the bracket 324 of the first rotating portion 320a can slide a short distance relative to the rocker 510 of the first rotating portion 320a, away from the main axis 100. The bracket 324 of the second rotating portion 320b can also slide a short distance relative to the rocker 510 of the second rotating portion 320b, away from the main axis 100, allowing the flexible screen 30 to move closer to the main axis 100. In this embodiment of the present application, the flange 1013 of the back cover 101 is relatively low. When the two hinge assemblies 300 are in the flat state, while ensuring the thinness and lightness of the foldable electronic device 1, the thickness of the hinge assembly 300 at the position directly opposite the flange 1013 of the back cover 101 is increased, which helps to improve the strength of the hinge assembly 300.

[0182] Figure 24 is a schematic diagram of the primary motion principle of another rotation mechanism 10 provided in an embodiment of the present application. In conjunction with Figures 18 and 24 , when the two rocker arms 510 cooperate with the first connecting rod 321, the second connecting rod 322, and the fourth connecting rod 325 in the above-described embodiment, the main shaft 100, the fourth connecting rod 325, the rocker arms 510, and the bracket 324 together form a slider-crank mechanism, which can provide the primary motion. While the slider-crank mechanism provides the primary motion, the first connecting rod 321 and the second connecting rod 322 provide the auxiliary motion.

[0183] It is understood that a slider-crank mechanism, also known as a crank-connecting rod mechanism, is a planar connecting rod mechanism that uses a crank and a slider to achieve the conversion between rotation and movement. In a slider-crank mechanism, the component that forms a moving pair with the frame is the slider, and the component that connects the crank and the slider via a rotating pair is the connecting rod. In the embodiment of the present application, the rocker arm 510 corresponds to the frame in the slider-crank mechanism, the bracket 324 corresponds to the slider in the slider-crank mechanism, the main shaft 100 corresponds to the crank in the slider-crank mechanism, and the fourth connecting rod 325 corresponds to the connecting rod in the slider-crank mechanism.

[0184] When the hinge assembly 300 transitions from the folded state to the unfolded state, the bracket 324 of the first rotating portion 320a slides relative to the rocker 510 of the first rotating portion 320a toward the main shaft 100, and the bracket 324 of the second rotating portion 320b slides relative to the rocker 510 of the second rotating portion 320b toward the main shaft 100, thereby bringing the first ends 321a of the two first connecting rods closer to each other. Simultaneously, the second connecting rod 322 rotates relative to the first connecting rod 321, and the third connecting rod 323 rotates relative to the first connecting rod 321, so that at least portions of the first connecting rod 321 and the second connecting rod 322 are aligned.

[0185] When the hinge assembly 300 transitions from the flat state to the folded state, the bracket 324 of the first rotating portion 320a slides relative to the swing link 510 of the first rotating portion 320a away from the main shaft 100, and the bracket 324 of the second rotating portion 320b slides relative to the swing link 510 of the second rotating portion 320b away from the main shaft 100, thereby moving the first ends 321a of the two first connecting rods away from each other. Simultaneously, the second connecting rod 322 rotates relative to the first connecting rod 321, and the third connecting rod 323 rotates relative to the first connecting rod 321, thereby creating a certain bending angle between the first connecting rod 321 and the second connecting rod 322. In the second direction Y, the distance between the first ends 321a of the two first connecting rods 321 is smaller than the distance between the second ends 321b of the two first connecting rods 321, and the distance between the first ends 322a of the two second connecting rods 322 is larger than the distance between the second ends 322b of the two second connecting rods 322.

[0186] In some other embodiments, the first part 311 and the second part 312 can also adopt other driving methods. Figure 25 is a partial exploded view of another rotating mechanism 10 provided in an embodiment of the present application. As shown in Figure 25, the first rotating part 320a can include the above-mentioned first connecting rod 321 and the fourth connecting rod 325, wherein one end of the fourth connecting rod 325 is rotatably connected to the main shaft 100 via a virtual axis connection, and the other end of the fourth connecting rod 325 can be rotatably connected to the bracket 324 of the first rotating part 320a via a physical axis connection. The first connecting rod 321 can be rotatably connected to the main shaft 100 via a virtual axis connection, and the first connecting rod 321 can also be connected to the rocker 510 so that the rocker 510 can drive the first connecting rod 321 to rotate relative to the main shaft 100. Of course, in some other examples, the first connecting rod 321 can also be connected to the fourth connecting rod 325 so that the fourth connecting rod 325 can drive the first connecting rod 321 to rotate relative to the main shaft 100.

[0187] In an embodiment where the first rotating portion 320a includes a first connecting rod 321 and a fourth connecting rod 325, the first portion 311 of the first supporting door panel 310a can be connected to the first connecting rod 321, that is, the second sub-portion 3119 can be connected to the first connecting rod 321, so that the first connecting rod 321 can drive the second sub-portion 3119 to rotate relative to the main shaft 100. Based on the above structure, one end of the second portion 312 of the first supporting door panel 310a can be connected to the fourth connecting rod 325, and the other end of the second portion 312 of the first supporting door panel 310a can be rotatably connected to the bracket 324. For example, one end of the first sub-portion can be connected to the fourth connecting rod 325, and the other end of the first sub-portion can be rotatably connected to the bracket 324.

[0188] As described in the above embodiment, the movement principle of the structural components within the second rotating portion 320b can be the same as the movement principle of the structural components within the first rotating portion 320a. Furthermore, the relevant structure of the second rotating portion 320b can also be the same as the relevant structure of the first rotating portion 320a. For example, the second rotating portion 320b can also include the above-mentioned first connecting rod 321 and fourth connecting rod 325, which will not be described in detail here. In the embodiment where the second rotating portion 320b includes the first connecting rod 321 and the fourth connecting rod 325, the first portion 311 of the second supporting door panel 310b can be connected to the first connecting rod 321, that is, the third sub-portion 3118 can be connected to the first connecting rod 321, so that the first connecting rod 321 can drive the third sub-portion 3118 to rotate relative to the main shaft 100. Based on the above structure, one end of the second portion 312 of the second supporting door panel 310b can be connected to the fourth connecting rod 325, and the other end of the second portion 312 of the second supporting door panel 310b can be rotatably connected to the bracket 324 of the second rotating portion 320b. For example, one end of the fourth sub-section may be connected to the fourth connecting rod 325 , and the other end of the fourth sub-section may be rotatably connected to the bracket 324 .

[0189] Figure 26 is a partial structural diagram of another second portion 312 provided in an embodiment of the present application. In particular, (a) in Figure 26 is a structural diagram of the second portion 312 from one perspective, and (b) in Figure 26 is a structural diagram of the second portion 312 from another perspective. In some embodiments, the structures of the first sub-portion 3129 and the fourth sub-portion 3128 may be the same. Alternatively, in some embodiments, the structures of the first sub-portion 3129 and the fourth sub-portion 3128 may also be different, so that one end of the second portion 312 of the first supporting door panel 310a can be connected to the fourth connecting rod 325, the other end of the second portion 312 of the first supporting door panel 310a can be rotatably connected to the bracket 324, one end of the second portion 312 of the second supporting door panel 310b can be connected to the fourth connecting rod 325, and the other end of the second portion 312 of the second supporting door panel 310b can be rotatably connected to the bracket 324 of the second rotating portion 320b.

[0190] The second portion 312 will be described below taking the first sub-portion 3129 as an example.

[0191] As shown in FIG26 , the first sub-section 3129 may include a first connecting plate 3121 having a mating hole 3123. The distance between the end of the mating hole 2123 closer to the spindle 100 and the support plane N is smaller than the distance between the end of the mating hole 2123 farther from the spindle and the support plane N. Accordingly, as shown in FIG25 , the fourth connecting rod 325 also includes an escape groove 3257. The groove wall of the escape groove 3257 has a through hole 3254 extending therethrough, and the through hole 3254 extends parallel to the first direction X. The first connecting plate 3121 of the first sub-section 3129 is positioned within the escape groove 3257 of the fourth connecting rod 325, and a pin is disposed within both the mating hole 3123 of the first sub-section 3129 and the through hole 3254 of the fourth connecting rod 325. As the pin slides along the strip-shaped hole of the first sub-section 3129, the first sub-section 3129 rotates relative to the fourth connecting rod 325. Through the above arrangement, the first sub-portion 3129 and the fourth connecting rod 325 are slidably connected.

[0192] For example, the second portion 312 may further include a second connecting plate 3125, which may further include an outwardly protruding fifth curved slider 3127. Accordingly, the bracket 324 may further include a fifth curved slot 3243, with which the fifth curved slider 3127 may be slidably coupled, thereby enabling the second portion 312 and the bracket 324 to be rotatably coupled via a virtual axis.

[0193] It is understandable that the second part 312 and the fourth connecting rod 325 can also be slidably connected in other ways, and the second part 312 and the bracket 324 can also be rotatably connected in other ways, and this application does not impose any restrictions on this.

[0194] Figure 27 is a cross-sectional view of the rotating mechanism 10 in Figure 25 in the flattened state, taken along line FF; Figure 28 is a cross-sectional view of the rotating mechanism 10 in Figure 25 in the folded state, taken along line FF. Combining Figures 27 and 28, when the two rotating shaft assemblies 300 rotate and the bracket 324 drives the fourth connecting rod 325 to rotate relative to the main shaft 100, the fifth curved slider 3127 of the second portion 312 slides along the fifth curved slot 3243 of the bracket 324, causing the second portion 312 to rotate relative to the bracket 324. Furthermore, the pin connected to the fourth connecting rod 325 slides along the strip-shaped hole of the second portion 312. When the two rotating shaft assemblies 300 are in the flattened state, the first sub-section 3129, the second sub-section 3119, the third sub-section 3118, and the fourth sub-section 3128 collectively form a support plane N, enhancing the flatness of the flexible screen 30 when flattened. When the two hinge assemblies 300 are in a folded state, in the second direction Y, the distance between the first end 3129a of the first sub-section and the first end 3128a of the fourth sub-section is greater than the distance between the second end 3129b of the first sub-section and the second end 3128b of the fourth sub-section. In the second direction Y, the distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section is less than the distance between the second end 3119b of the second sub-section and the second end 3118b of the third sub-section. The distance between the first end 3119a of the second sub-section and the first end 3118a of the third sub-section along the second direction Y is increased, which can make the flexible screen 30 bend into a water drop shape or a water drop shape, avoiding excessive extrusion of the flexible screen 30, thereby reducing the stress of the flexible screen 30 and improving the reliability of the flexible screen 30.

[0195] In some embodiments, in the first supporting door panel 310a, the first portion 311 and the second portion 312 may be two independent structures, and the first portion 311 and the second portion 312 may be spaced apart. For example, the first sub-portion 3129 and the second sub-portion 3119 may be two independent structures. In the second supporting door panel 310b, the first portion 311 and the second portion 312 may be two independent structures, and the first portion 311 and the second portion 312 may be spaced apart. For example, the third sub-portion 3118 and the fourth sub-portion 3128 may be two independent structures.

[0196] Figure 29 is a structural diagram of another supporting door panel 310 provided in an embodiment of the present application. Alternatively, in some other embodiments, as shown in Figure 29 , the supporting door panel 310 may further include a bent portion 313, which connects between the first portion 311 and the second portion 312. For example, in the first supporting door panel 310a, the bent portion 313 may connect between the first sub-portion 3129 and the second sub-portion 3119; in the second supporting door panel 310b, the bent portion 313 may connect between the third sub-portion 3118 and the fourth sub-portion 3128.

[0197] In some embodiments, the first supporting door panel 310a and the second supporting door panel 310b may have the same structure. Of course, in other embodiments, the first supporting door panel 310a and the second supporting door panel 310b may have different structures, which is not specifically limited in this embodiment of the present application. The following description will only take the first supporting door panel 310a as an example.

[0198] When the two hinge assemblies 300 are flat, the bent portion 313 is flattened; when the two hinge assemblies 300 are folded, the bent portion 313 is bent. This arrangement allows the bent portion 313 to fill the gap between the first portion 311 and the second portion 312. For example, in the first supporting door panel 310a, the bent portion 313 can fill the gap between the first sub-section 3129 and the second sub-section 3119. When the two hinge assemblies 300 are flat, this further enhances the support provided by the supporting door panel 310 to the flexible screen 30.

[0199] The center of the bent portion 313 can be located on the rotation axis of the second connecting rod 322 relative to the first connecting rod 321. As described in the above embodiment, the rotation axis of the second connecting rod 322 relative to the first connecting rod 321 is the second axis s2, that is, the center of the bent portion 313 can be located on the second axis s2. When the second connecting rod 322 rotates relative to the first connecting rod 321, an angle is formed between the second connecting rod 322 and the first connecting rod 321, and the bent portion 313 bends under the influence of the first connecting rod 321 and the second connecting rod 322. Of course, in some other embodiments, the center of the bent portion 313 can also be at a certain distance from the second axis s2, so that the bent portion 313 can bend when the first connecting rod 321 and the second connecting rod 322 rotate. The embodiment of the present application does not specifically limit the position of the bent portion 313.

[0200] Figure 30 is a partial enlarged view of point N of the support door panel 310 in Figure 29. As shown in Figure 30 , the bent portion 313, the first sub-portion 3129, and the second sub-portion 3119 form an integrated structure. For example, the integrated structure formed by the bent portion 313, the first sub-portion 3129, and the second sub-portion 3119 can be substantially flat. This arrangement helps improve the structural reliability of the support door panel 310.

[0201] In some embodiments, the bending portion 313 may have multiple openings 3131, which is beneficial to reducing the rigidity of the bending portion 313 and reducing the elastic force of the bending portion 313 on the flexible screen 30 when bending, thereby improving the bending feel of the supporting door panel 310.

[0202] For example, the opening 3131 may extend through the bent portion 313 , may be in the shape of a strip, and may extend parallel to the first direction X. This arrangement further reduces the elastic force exerted by the bent portion 313 on the flexible screen 30 during bending, thereby further improving the bending feel of the supporting door panel 310 . Of course, in other examples, the opening 3131 may also be in the shape of a circular hole, an elliptical hole, or the like. The present embodiment does not impose any specific limitations on the shape of the opening 3131 .

[0203] FIG31 is a structural diagram of another support door panel 310 provided in an embodiment of the present application; FIG32 is a cross-sectional view of a support door panel 310 in FIG31 along the GG section line. In conjunction with FIG31 and FIG32, in some other embodiments, the thickness of the bent portion 313 can be less than the thickness of the first portion 311, and the thickness of the bent portion 313 can be less than the thickness of the second portion 312, and the first sub-portion 3129, the second sub-portion 3119 and the bent portion 313 are an integral structure. Exemplarily, the integral structure formed by the first sub-portion 3129, the second sub-portion 3119 and the bent portion 313 can be roughly a flat plate structure. The bent portion 313 can be thinned so that the thickness of the bent portion 313 is less than the thickness of the first sub-portion 3129, and the thickness of the bent portion 313 is also less than the thickness of the second sub-portion 3119. For example, the surfaces of the first sub-portion 3129, the second sub-portion 3119, and the side of the bent portion 313 facing away from the rotating portion 320 are coplanar, while the surface of the bent portion 313 on the side close to the rotating portion 320 is recessed compared to the surfaces of the first sub-portion 3129 and the second sub-portion 3119 close to the rotating portion 320. This arrangement helps reduce the rigidity of the bent portion 313 and the elastic force of the bent portion 313 on the flexible screen 30 when bending, thereby improving the bending feel of the supporting door panel 310.

[0204] Furthermore, the surfaces of the first sub-portion 3129, the second sub-portion 3119, and the bent portion 313 on the side away from the rotating portion 320 are coplanar, which helps to improve the support effect of the door panel 310 on the flexible screen 30. Of course, in some other embodiments, the surfaces of the first sub-portion 3129, the second sub-portion 3119, and the bent portion 313 on the side close to the rotating portion 320 are coplanar, and the surface of the bent portion 313 on the side away from the rotating portion 320 is recessed compared to the surfaces of the first sub-portion 3129 and the second sub-portion 3119 away from the rotating portion 320.

[0205] Figure 33 is a cross-sectional view of another support door panel 310 shown in Figure 31 along section line GG. In conjunction with Figures 31 and 33, in some other embodiments, the support door panel 310 may further include a flexible layer 314. The flexible layer 314 is connected to the same side of the first sub-section 3129 and the second sub-section 3119, and the flexible layer 314 located between the first sub-section 3129 and the second sub-section 3119 forms a bent portion 313. For example, the flexible layer 314 may be stacked with the first sub-section 3129 and the second sub-section 3119, respectively, and may be located on the side of the first sub-section 3129 and the second sub-section 3119 away from the rotating portion 320. The flexible layer 314 may be bonded to the first sub-section 3129 and the second sub-section 3119, respectively. The material of the flexible layer 314 can include, for example, Kevlar fabric, polyethylene terephthalate (PET), polyimide (PI), or other flexible film materials, so that the flexible layer 314 can have a good bending effect. When the two hinge assemblies 300 are in a flat state, the flexible layer 314 located between the first sub-section 3129 and the second sub-section 3119 is flattened, which helps further improve the support effect of the door panel 310 on the flexible screen 30. When the two hinge assemblies 300 are in a folded state, the flexible layer 314 located between the first sub-section 3129 and the second sub-section 3119 is bent.

[0206] Furthermore, the flexible layer 314 can be located on the side of the first sub-portion 3129 and the second sub-portion 3119 away from the rotating portion 320, which is conducive to improving the support effect of the door panel 310 on the flexible screen 30. Of course, in some other examples, the flexible layer 314 can also be located on the side of the first sub-portion 3129 and the second sub-portion 3119 close to the rotating portion 320, which is not specifically limited in the embodiments of the present application.

[0207] Furthermore, the two rocker arms 510 arranged along the second direction Y are referred to as a rocker arm pair. The number of rocker arm pairs is not limited in the present embodiment. As shown in FIG10 , taking the central rotation module 400 as an example, the rotation module 400 may include four rocker arm pairs. Two of these rocker arm pairs may be located on one side of the first connecting rod 321 along the first direction X, and the second structural portion 410 includes these two rocker arm pairs to achieve synchronous rotation of the two rotating shaft assemblies 300. Alternatively, two rocker arm pairs may be located on the other side of the first connecting rod 321 along the first direction X, and the first structural portion 420 includes these other two rocker arm pairs to provide a damping force when the two rotating shaft assemblies 300 rotate. As described in the above embodiment, the main shaft 100 may further include a first mating portion 100b and a second mating portion 100c located on either side of the support mating portion 100a. The first mating portion 100b is configured to mate with the first structural portion 420, and the second mating portion 100c is configured to mate with the second structural portion 410.

[0208] Figure 34 is an exploded view of the structure of a first structural part 420 provided in an embodiment of the present application; Figure 35 is a structural diagram of a first matching part of a main shaft provided in an embodiment of the present application. The structure of the first matching part 100b and the first structural part 420 will be described below with reference to Figure 34 and in combination with Figure 35. As described in the above embodiment, the main shaft 100 and the rocker arm 510 can be rotatably connected by a pin. Among them, in the first matching part 100b, the pin connected between the main shaft 100 and the rocker arm 510 can be referred to as a first rotating shaft 131. The first matching part 100b may include a first mounting part 120, and the first mounting part 120 has a main shaft connection hole 121 running through it.

[0209] Furthermore, the first mating portion 100b may further include a first slide groove 141 and a second slide groove 142 spaced apart along the first direction X, with the first mounting portion 120 located between the first slide groove 141 and the second slide groove 142. The first slide groove 141 and the second slide groove 142 both extend along the first direction X. Accordingly, the first structural portion 420 may include two damping sliders 143, one of which may be slidably connected to the first slide groove 141 to enable the damping slider 143 to slide relative to the spindle 100 along the first direction X; and the other damping slider 143 may be slidably connected to the second slide groove 142 to enable the other damping slider 143 to slide relative to the spindle 100 along the first direction X.

[0210] Figure 36 is a structural diagram of a damping slider 143 provided in an embodiment of the present application. As shown in Figure 36 , the damping slider 143 may further include two first through-holes 1431 arranged along the second direction Y, with the first through-holes 1431 extending along the first direction X. In conjunction with Figure 34 , a first rotation axis 131 is disposed within one of the first through-holes 1431, allowing the damping slider 143 to slide relative to the first rotation axis 131 along the first direction X. The surface of the damping slider 143 adjacent to the first through-hole 1431 and facing the first mounting portion 120 includes first protrusions 1432 and first recesses 1433 alternately arranged along the circumference of the first through-hole 1431. Correspondingly, the surface of the rocker arm 510 adjacent to the rocker arm connecting hole 512 and facing the damping slider 143 includes second protrusions 5121 and second recesses 5122 alternately arranged along the circumference of the rocker arm connecting hole 512. When the two rotating shaft assemblies 300 are in a flat state or a folded state, the first recess 1433 engages with the second protrusion 5121 , and the first protrusion 1432 engages with the second recess 5122 ; when the two rotating shaft assemblies 300 rotate relative to the main shaft 100 , the first protrusion 1432 contacts the second protrusion 5121 .

[0211] Based on the above structure, the first structural portion 420 may further include two first springs 132 arranged along the second direction Y. Each first spring 132 may be sleeved on a first rotating shaft 131, with one end of each first spring 132 abutting against a damping slider 143, and the other end of each first spring 132 being fixed to the end of the first rotating shaft 131 via a retaining spring 150. When the two rotating shaft assemblies 300 are in a flat or folded state, the first spring 132 is in a first compressed state. When the two rotating shaft assemblies 300 rotate relative to the main shaft 100, the first spring 132 is in a second compressed state, and the length of the first spring 132 in the second compressed state is less than the length of the first spring 132 in the first compressed state.

[0212] With this arrangement, when the two rotating shaft assemblies 300 are in the flat or folded state, the first recess 1433 engages with the second protrusion 5121, and the first protrusion 1432 engages with the second recess 5122. With the first spring 132 in the first compressed state, the elastic restoring force of the first spring 132 acts as a damping force. This elastic restoring force can resist the rocker 510 in the first direction X, thereby maintaining the flat and folded states of the two rotating shaft assemblies 300 in the absence of external forces. When the two rotating shaft assemblies 300 rotate, the first protrusion 1432 contacts the second protrusion 5121, causing the damping slider 143 to move along the first rotating axis 131 away from the first mounting portion 120, further compressing and deforming the first spring 132, placing it in the second compressed state. At this point, the elastic restoring force of the first spring 132 acts as a damping force.

[0213] Furthermore, the surface of the first mounting portion 120, adjacent to the spindle connection hole 121 and facing the rocker 510, includes third protrusions 1211 and third recesses 1212 alternately arranged along the circumference of the spindle connection hole 121. When the two rotating shaft assemblies 300 are in a flat or folded state, the first recesses 1433 engage with the third protrusions 1211, and the first protrusions 1432 engage with the third recesses 1212. When the two rotating shaft assemblies 300 rotate relative to the spindle 100, the first protrusions 1432 contact the third protrusions 1211. Through the above-mentioned arrangement, when the two rotating shaft assemblies 300 are in a flat state or a folded state, the flat state and the folded state of the two rotating shaft assemblies 300 can be further maintained; when the two rotating shaft assemblies 300 rotate relative to the main shaft 100, the distance that the damping slider 143 moves along the first rotating axis 131 in the direction away from the first mounting portion 120 increases, and the elastic restoring force of the first spring 132 increases, that is, the damping force increases.

[0214] Figure 37 is an exploded view of the structure of a second structural part 410 provided in an embodiment of the present application; Figure 38 is a structural diagram of a second matching part of a main shaft provided in an embodiment of the present application. The structure of the second matching part 100c and the second structural part 410 will be described below with reference to Figure 37 and in combination with Figure 38. As described in the above embodiment, the main shaft 100 and the rocker arm 510 can be rotatably connected by a pin. Among them, in the second matching part 100c, the pin connected between the main shaft 100 and the rocker arm 510 can be referred to as a second rotating shaft 161. The second matching part 100c may include a second mounting part 122, and the second mounting part 122 has a main shaft connection hole 121 running through it.

[0215] Furthermore, the second mating portion 100c may further include a third sliding groove 146 and a fourth sliding groove 144 spaced apart along the first direction X, with the fourth sliding groove 144 being located on a side of the third sliding groove 146 facing away from the second mounting portion 122. Both the fourth sliding groove 144 and the third sliding groove 146 extend along the first direction X. Accordingly, the second structural portion 410 may include a first synchronous slider 145 and a second synchronous slider 174. The first synchronous slider 145 may be slidably connected to the third sliding groove 146 to enable the first synchronous slider 145 to slide relative to the spindle 100 along the first direction X; and the second synchronous slider 174 may be slidably connected to the fourth sliding groove 144 to enable the second synchronous slider 174 to slide relative to the spindle 100 along the first direction X.

[0216] Figure 39 is a structural diagram of a first synchronous slider 145 provided in an embodiment of the present application. As shown in Figure 39, the first synchronous slider 145 further includes two third through-holes 1221 arranged along the second direction Y, and the third through-holes 1221 extend along the first direction X. In conjunction with Figure 37, a second rotation axis 161 is inserted into one of the third through-holes 1221, allowing the first synchronous slider 145 to slide relative to the second rotation axis 161 along the first direction X. Furthermore, the portion of the first synchronous slider 145 inserted through the second rotation axis 161 is located between two rocker arms 510 arranged along the first direction X. The surface of the first synchronous slider 145 adjacent to the first through-hole 1431 and facing the rocker arms 510 includes a first helical surface 1223. Correspondingly, the surface of the rocker arm 510 adjacent to the rocker arm connection hole 512 and facing the first synchronous slider 145 includes a second helical surface 515, which meshes with the first helical surface 1223.

[0217] With the above arrangement, when one shaft assembly 300 (e.g., the first shaft assembly 300a) rotates, the rocker arm 510 on the same side rotates relative to the main shaft 100, and the second helical surface 515 rotates with the rocker arm 510, causing the second helical surface 515 to push against the first helical surface 1223 of the first synchronous slider 145 on the same side, and the first synchronous slider 145 moves along the main shaft 100. The first helical surface 1223 on the other side moves with the first synchronous slider 145, causing the first helical surface 1223 to push against the second helical surface 515 of the rocker arm 510 on the other side, thereby causing the rocker arm 510 on the other side to rotate relative to the main shaft 100, and driving the other shaft assembly 300 (e.g., the second shaft assembly 300b) to rotate. Here, "the same side" and "the other side" can be understood as meaning that, relative to the central axis of the main shaft 100, one rotating shaft assembly 300, one rocker arm 510, and one first helical surface 1223 of the first synchronous slider 145 are located on the same side, while the other rotating shaft assembly 300, another rocker arm 510, and another first helical surface 1223 of the first synchronous slider 145 are located on the other side. In summary, through the above arrangement, the two rocker arms 510 in a rocker arm 510 pair can rotate synchronously relative to the main shaft 100, thereby achieving synchronous rotation of the two rotating shaft assemblies 300.

[0218] Figure 40 is a structural diagram of a second synchronization slider 174 provided in an embodiment of the present application. As shown in Figure 40, the second synchronization slider 174 also includes two fourth through-holes 1743 arranged along the second direction Y, and the fourth through-holes 1743 extend along the first direction X. In conjunction with Figure 37, a second rotation axis 161 is inserted into one of the fourth through-holes 1743, allowing the second synchronization slider 174 to slide relative to the second rotation axis 161 along the first direction X. Furthermore, the portion of the second synchronization slider 174 inserted through the second rotation axis 161 is located on the side of the rocker 510 facing away from the first synchronization slider 145. The surface of the second synchronization slider 174 adjacent to the fourth through-hole 1743 and facing the rocker 510 includes fourth protrusions 1741 and fourth protrusions 1741 arranged alternately along the circumference of the fourth through-hole 1743. Correspondingly, the surface of the rocker arm 510 adjacent to the rocker arm connection hole 512 and facing the second synchronization slider 174 includes fifth protrusions 5123 and fifth recesses 5124 alternately arranged along the circumference of the rocker arm connection hole 512. When the two rotating shaft assemblies 300 are in the flat or folded state, the fifth recesses 5124 engage with the fourth protrusions 1741, and the fifth protrusions 5123 engage with the fourth recesses 1742. When the two rotating shaft assemblies 300 rotate relative to the main shaft 100, the fifth protrusions 5123 contact the fourth protrusions 1741.

[0219] Based on the above structure, the second structural portion 410 may further include two second springs 162 arranged along the second direction Y. Each second spring 162 may be sleeved on a second rotating shaft 161, with one end of each second spring 162 abutting against the second synchronization slider 174, and the other end of each second spring 162 being fixed to the end of the second rotating shaft 161 via a retaining spring 150. When the two rotating shaft assemblies 300 are in the flat or folded state, the second springs 162 are in a third compressed state. When the two rotating shaft assemblies 300 rotate relative to the main shaft 100, the second springs 162 are in a fourth compressed state, and the length of the second spring 162 in the fourth compressed state is less than the length of the second spring 162 in the third compressed state.

[0220] With the above arrangement, when the two rotating shaft assemblies 300 are in the flat or folded state, the fifth recess 5124 engages with the fourth protrusion 1741, and the fifth protrusion 5123 engages with the fourth recess 1742. With the second spring 162 in the third compressed state, the elastic restoring force of the second spring 162 acts as a damping force. This elastic restoring force can push against the second synchronization slider 174 in the first direction X, thereby maintaining the two rotating shaft assemblies 300 in the flat or folded state in the absence of external force. When the two rotating shaft assemblies 300 rotate, the fifth protrusion 5123 contacts the fourth protrusion 1741, causing the second synchronization slider 174 to move along the second rotating axis 161 away from the second mounting portion 122, further compressing and deforming the second spring 162, placing it in the fourth compressed state. At this point, the elastic restoring force of the second spring 162 acts as a damping force.

[0221] In summary, the second structural portion 410 can not only drive the two rocking rods 510 to rotate synchronously, but also provide a damping force when the two rotating shaft assemblies 300 rotate.

[0222] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A rotating mechanism, characterized in that: include: a main axis (100), the main axis (100) extending along a first direction (X); Two rotating shaft assemblies (300), comprising a first rotating shaft assembly (300a) and a second rotating shaft assembly (300b), wherein the first rotating shaft assembly (300a) is rotationally connected to the main shaft (100), and the second rotating shaft assembly (300b) is rotationally connected to the main shaft (100), and the rotation axes of the two rotating shaft assemblies (300) relative to the main shaft (100) are parallel to the first direction (X) and do not overlap; A supporting door panel (300) includes four sub-sections, wherein the four sub-sections include a first sub-section (3129), a second sub-section (3119), a third sub-section (3118) and a fourth sub-section (3128); The first sub-section (3129) is connected to the first rotating shaft assembly (300a), the second sub-section (3119) is connected to the first rotating shaft assembly (300a); the third sub-section (3118) is connected to the second rotating shaft assembly (300b), and the fourth sub-section (3128) is connected to the second rotating shaft assembly (300b); When the two rotating shaft assemblies (300) are in a flat state: the first sub-section (3129), the second sub-section (3119), the third sub-section (3118) and the fourth sub-section (3128) are arranged in sequence along the second direction (Y); the first sub-section (3129), the second sub-section (3119), the third sub-section (3118) and the fourth sub-section (3128) together constitute a supporting plane (N); in the second direction (Y), the second end (3129b) of the first sub-section, the first end (3129a) of the first sub-section and the first end (3129b) of the first sub-section are ), the second end (3119b) of the second sub-section, the first end (3119a) of the second sub-section, the first end (3118a) of the third sub-section, the second end (3118b) of the third sub-section, the first end (3128a) of the fourth sub-section and the second end (3128b) of the fourth sub-section are arranged in sequence; the distance between the first end (3119a) of the second sub-section and the first end (3118a) of the third sub-section along the second direction (Y) is a first distance (D1); the second direction (Y) is perpendicular to the first direction (X); When the rotating mechanism (10) is transformed from the flat state to the folded state, the first sub-section (3129), the second sub-section (3119), the third sub-section (3118), and the fourth sub-section (3128) rotate relative to the main shaft (100), and the four sub-sections of the supporting door panel (300) do not bend; When the two rotating shaft assemblies (300) are in a folded state: in the second direction (Y), the distance between the first end (3129a) of the first sub-section and the first end (3128a) of the fourth sub-section is greater than the distance between the second end (3129b) of the first sub-section and the second end (3128b) of the fourth sub-section; in the second direction (Y), the distance between the first end (3119a) of the second sub-section and the first end (3118a) of the third sub-section is less than the distance between the second end (3119b) of the second sub-section and the second end (3118b) of the third sub-section; the distance between the first end (3119a) of the second sub-section and the first end (3118a) of the third sub-section along the second direction (Y) is a second distance (D2), and the second distance (D2) is greater than the first distance (D1).

2. The rotating mechanism according to claim 1, characterized in that: When the two rotating shaft assemblies (300) are in a folded state, in a direction close to the main axis (100), the distance between the first sub-section (3129) and the fourth sub-section (3128) in the second direction (Y) gradually increases, or the distance between the first sub-section (3129) and the fourth sub-section (3128) in the second direction (Y) first decreases and then increases.

3. The rotating mechanism according to claim 1, characterized in that: When the two rotating shaft assemblies (300) are in a folded state, in a direction close to the main axis (100), the distance between the second sub-section (3119) and the third sub-section (3118) in the second direction (Y) gradually decreases.

4. The rotating mechanism according to any one of claims 1 to 3, characterized in that: The first rotating shaft assembly (300a) comprises a first connecting rod (321), a second connecting rod (322) and a bracket (324), wherein the first end (321a) of the first connecting rod is rotationally connected to the main shaft (100), the second end (321b) of the first connecting rod is rotationally connected to the first end (322a) of the second connecting rod, the second end (322b) of the second connecting rod is rotationally connected to the bracket (324), and the rotation axis of the bracket (324) relative to the second connecting rod (322) is parallel to the first direction (X), the rotation axis of the second connecting rod (322) relative to the first connecting rod (321) is parallel to the first direction (X), and the rotation axis of the first connecting rod (321) relative to the main shaft (100) is parallel to the first direction (X); The first sub-section (3129) is connected to the first rotating shaft assembly (300a), and the second sub-section (3119) is connected to the first rotating shaft assembly (300a), comprising: The first sub-section (3129) is connected to the second connecting rod (322), and the second sub-section (3119) is connected to the first connecting rod (321).

5. The rotating mechanism according to claim 4, characterized in that: The first sub-section (3129) is fixedly connected to the second connecting rod (322), and the second sub-section (3119) is fixedly connected to the first connecting rod (321).

6. The rotating mechanism according to claim 4 or 5, characterized in that: The first end (321a) of the first connecting rod is rotatably connected to the main shaft (100), comprising: the first end (321a) of the first connecting rod is rotatably connected to the main shaft (100) via a first arc-shaped sliding block (3212) and a first arc-shaped sliding groove (102); The first end (321a) of the first connecting rod includes a first arc-shaped slider (3212), and the main shaft (100) includes a first arc-shaped slot (102); or, the first end (321a) of the first connecting rod includes a first arc-shaped slot (102), and the main shaft (100) includes a first arc-shaped slider (3212).

7. The rotating mechanism according to claim 6, characterized in that: The first end (322a) of the second connecting rod is connected to the second end (321b) of the first connecting rod via a pin shaft, and the second end (322b) of the second connecting rod is rotatably connected to the bracket (324), including: the second end (322b) of the second connecting rod is rotatably connected to the bracket (324) via a second arc-shaped sliding block (3223) and a second arc-shaped sliding groove (3241); The second end (322b) of the second connecting rod includes a second arc-shaped slider (3223), and the bracket (324) includes a second arc-shaped slide groove (3241); or, the second end (322b) of the second connecting rod includes a second arc-shaped slide groove (3241), and the bracket (324) includes a second arc-shaped slider (3223).

8. The rotating mechanism according to any one of claims 4 to 7, characterized in that: The first rotating shaft assembly (300a) further comprises a third connecting rod (323), wherein a first end (323a) of the third connecting rod is rotatably connected to the first connecting rod (321), and a second end (323b) of the third connecting rod is rotatably connected to the bracket (324); The rotating mechanism (10) further comprises a back cover (101), the back cover (101) and the main shaft (100) are stacked along a third direction (Z), the back cover (101) comprises an appearance surface (E), and the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y); The rotation axis of the third connecting rod (323) relative to the first connecting rod (321) is the first axis (s1), the first axis (s1) is parallel to the first direction (X), the rotation axis of the second connecting rod (322) relative to the first connecting rod (321) is the second axis (s2), when the two rotating shaft assemblies (300) are in a flat state, the distance between the second axis (s2) and the reference surface (F) in the third direction (Z) is greater than the distance between the first axis (s1) and the reference surface (F) in the third direction (Z), the reference surface (F) is parallel to the first direction (X) and the second direction (Y), and the appearance surface (E) intersects with the reference surface (F) at the farthest point from the support plane (M) along the third direction (Z); The rotation axis of the third connecting rod (323) relative to the bracket (324) is the third axis (s3), and the third axis (s3) is parallel to the first direction (X). The rotation axis of the second connecting rod (322) relative to the bracket (324) is the fourth axis (s4). When the two rotating shaft assemblies (300) are in a flat state, the distance between the fourth axis (s4) and the reference surface (F) in the third direction (Z) is greater than the distance between the third axis (s3) and the reference surface (F) in the third direction (Z).

9. The rotating mechanism according to claim 8, characterized in that: The second end (323b) of the third connecting rod is connected to the bracket (324) via a pin shaft, and the first end (323a) of the third connecting rod is rotatably connected to the first connecting rod (321) via a third arc-shaped sliding block (3232) and a third arc-shaped sliding groove (3214); The first end (323a) of the third connecting rod includes a third arc-shaped slider (3232), and the first connecting rod (321) includes a third arc-shaped slot (3214); or, the first end (323a) of the third connecting rod includes a third arc-shaped slot (3214), and the first connecting rod (321) includes a third arc-shaped slider (3232).

10. The rotating mechanism according to any one of claims 4 to 9, characterized in that: The first rotating shaft assembly (300a) also includes a fourth connecting rod (325), the first end (325a) of the fourth connecting rod is rotationally connected to the main shaft (100), the second end (325b) of the fourth connecting rod is rotationally connected to the bracket (324), and the rotation axis of the bracket (324) relative to the fourth connecting rod (325) and the rotation axis of the fourth connecting rod (325) relative to the main shaft (100) are both parallel to the first direction (X).

11. The rotating mechanism according to claim 10, characterized in that: The second end (325b) of the fourth connecting rod is connected to the bracket (324) via a pin shaft, and the first end (325a) of the fourth connecting rod is rotatably connected to the main shaft (100), including: the first end (325a) of the fourth connecting rod is rotatably connected to the main shaft (100) via a fourth arc-shaped sliding block (3252) and a fourth arc-shaped sliding groove (103); The first end (325a) of the fourth connecting rod includes a fourth arc-shaped slider (3252), and the main shaft (100) further includes a fourth arc-shaped slot (103); or, the first end (325a) of the fourth connecting rod includes a fourth arc-shaped slot (103), and the main shaft (100) further includes a fourth arc-shaped slider (3252).

12. The rotating mechanism according to any one of claims 1 to 11, characterized in that: The first rotating shaft assembly (300a) further comprises a swing rod (510), wherein a first end (510a) of the swing rod is rotationally connected to the main shaft (100), and a rotation axis of the swing rod (510) relative to the main shaft (100) is parallel to the first direction (X), and a second end (510b) of the swing rod is slidably connected to the bracket (324), and a sliding direction of the swing rod (510) relative to the bracket (324) is not parallel to an extension direction of the bracket (324); When the two rotating shaft assemblies (300) rotate from the flat state to the folded state, the bracket (324) slides relative to the swing rod (510) in a direction away from the main shaft (100); when the two rotating shaft assemblies (300) rotate from the folded state to the flat state, the The bracket (324) slides relative to the swing rod (510) in a direction approaching the main shaft (100).

13. The rotating mechanism according to claim 12, characterized in that: The first end (510a) of the rocker arm includes a rocker arm (510) slider, the second end (510b) of the rocker arm is rotatably connected to the main shaft (100) via a pin, the bracket (324) includes a bracket (324) slide groove, and the rocker arm (510) slider is slidably connected to the bracket (324) slide groove.

14. The rotating mechanism according to any one of claims 1 to 13, characterized in that: The supporting door panel (300) further comprises a bent portion (313), wherein the bent portion (313) is connected between the second sub-portion (3119) and the first sub-portion (3129); When the two rotating shaft assemblies (300) are in a flat state, the bending portion (313) is flattened; when the two rotating shaft assemblies (300) are in a folded state, the bending portion (313) is bent, and a bending angle is formed between the first sub-portion (3129) and the second sub-portion (3119).

15. The rotating mechanism according to claim 14, characterized in that: The bent portion (313), the second sub-portion (3119) and the first sub-portion (3129) are an integral structure.

16. The rotating mechanism according to claim 15, characterized in that: The bent portion (313) has a plurality of openings.

17. The rotating mechanism according to claim 15, characterized in that: The thickness of the bent portion (313) is smaller than the thickness of the first sub-portion (3129), and the thickness of the bent portion (313) is smaller than the thickness of the second sub-portion (3119).

18. The rotating mechanism according to claim 14, characterized in that: The supporting door panel (300) further includes a flexible layer (314), wherein the flexible layer (314) is connected to the same side of the second sub-section (3119) and the first sub-section (3129), and the flexible layer (314) located between the second sub-section (3119) and the first sub-section (3129) is the bent portion (313).

19. The rotating mechanism according to any one of claims 1 to 18, characterized in that: In a direction perpendicular to the support plane (N), the first sub-portion (3129) and the main axis (100) at least partially overlap, and the second sub-portion (3119) and the main axis (100) at least partially overlap.

20. A foldable electronic device, characterized in that: include: A flexible screen (30), a first structural member (21), a second structural member (22), and a rotating mechanism (10) according to any one of claims 1 to 19; The first structural member (21) and the second structural member (22) are connected to two sides of the rotating mechanism (10); the flexible screen (30) is located on the same side of the first structural member (21) and the second structural member (22), and is connected to the first structural member (21) and the second structural member (22); When the foldable electronic device is in an unfolded state, the supporting plane (N) of the rotating mechanism (10) is used to support the flexible screen (30); When the foldable electronic device is in a folded state, the first sub-portion (3129) of the rotating mechanism (10), the second sub-portion (3119) of the rotating mechanism (10), the third sub-portion (3118) of the rotating mechanism (10), the fourth sub-portion (3128) of the rotating mechanism (10) and the main axis (100) of the rotating mechanism (10) jointly enclose a screen-containing space (M), and part of the flexible screen (30) is located in the screen-containing space (M).

21. The foldable electronic device according to claim 20, characterized in that: At least one of the first sub-section (3129), the second sub-section (3119), the third sub-section (3118) and the fourth sub-section (3128) is connected to the flexible screen (30).

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