Folding device and electronic apparatus

Abstract

A folding device and an electronic apparatus, relating to the technical field of folding structures. The folding device comprises a base (100), a first rotary mechanism (200a) and a second rotary mechanism (200b), wherein a first rotary member (21a), a first synchronizing member (22a), a first connecting member (23a) and the base (100) jointly form a parallelogram linkage mechanism in the first rotary mechanism (200a).

Description

Folding device and electronic device

[0001] This application claims priority to the Chinese patent application No. 202411012833X, filed on July 25, 2024, and titled "Folding device and electronic device", the content of which is incorporated herein by reference.

TECHNICAL FIELD

[0002] The present application relates to the technical field of folding structure, in particular to a folding device and an electronic device.

BACKGROUND

[0003] With the continuous development of display technology, various electronic devices have been launched. Since the folding electronic device can realize the combination of small overall size and large display screen, it has been increasingly favored by users. In order to meet the folding requirements of the electronic device, the key lies in whether the design of the folding device is reasonable.

SUMMARY

[0004] In one aspect, the present application provides a folding device, comprising a base, a first rotating mechanism and a second rotating mechanism. The first rotating mechanism and the second rotating mechanism are respectively rotatably connected to opposite sides of the base to make the folding device have a folded state and an unfolded state. The first rotating mechanism comprises a first rotating piece, a first synchronous piece, a first sliding piece and a first connecting piece. One end of the first rotating piece is rotatably connected to the base about a first fixed rotating shaft, and the other end is rotatably connected to the first connecting piece about a first active rotating shaft. One end of the first synchronous piece is rotatably connected to the base about a first fixed synchronous shaft, and the other end is rotatably connected to the first connecting piece about a first active synchronous shaft. The first fixed rotating shaft, the first active rotating shaft, the first fixed synchronous shaft and the first active synchronous shaft are parallel and do not coincide. The distance from the first fixed rotating shaft to a first plane is different from the distance from the first fixed synchronous shaft to the first plane. The first plane is a reference plane perpendicular to the thickness direction of the base and located at the bottom of the base. The projection of the first fixed rotating shaft and the first fixed synchronous shaft on a second plane is connected by a straight line to form a first fixed edge. The projection of the first active rotating shaft and the first active synchronous shaft on the second plane is connected by a straight line to form a first active edge. The second plane is a reference plane perpendicular to the first fixed rotating shaft. The first fixed edge and the first active edge are parallel to each other and have equal lengths, so that the first rotating piece, the first synchronous piece, the first connecting piece and the base collectively form a parallelogram linkage mechanism. The first sliding piece is slidably connected to one end of the first rotating piece away from the base in a first direction, and the first sliding piece is slidably connected to one end of the first synchronous piece away from the base in a third direction. The projection of the first direction and the third direction on the second plane is not parallel.

[0005] In one aspect, the embodiments of the present application provide a folding device, which comprises a base, a first rotating mechanism and a second rotating mechanism. The first rotating mechanism and the second rotating mechanism are respectively rotatably connected to opposite sides of the base to make the folding device have a folded state and an unfolded state. The first rotating mechanism comprises a first rotating member, a first synchronous member and a first connecting member. One end of the first rotating member is rotatably connected to the base around a first fixed rotating shaft, and the other end is rotatably connected to the first connecting member around a first movable rotating shaft. One end of the first synchronous member is rotatably connected to the base around a first fixed synchronous shaft, and the other end is rotatably connected to the first connecting member around a first movable synchronous shaft. The first fixed rotating shaft, the first movable rotating shaft, the first fixed synchronous shaft and the first movable synchronous shaft are parallel and do not coincide. The distance from the first fixed rotating shaft to a first plane is different from the distance from the first fixed synchronous shaft to the first plane. The first plane is a reference plane which is perpendicular to the thickness direction of the base and located at the bottom of the base. The projection of the first fixed rotating shaft and the first fixed synchronous shaft on a second plane is connected by a straight line to form a first fixed side. The projection of the first movable rotating shaft and the first movable synchronous shaft on the second plane is connected by a straight line to form a first movable side. The second plane is a reference plane which is perpendicular to the first fixed rotating shaft. The first fixed side and the first movable side are parallel to each other and have equal lengths, so that the first rotating member, the first synchronous member, the first connecting member and the base form a parallelogram linkage mechanism.

[0006] In another aspect, the present application provides an electronic device, which comprises a first shell, a second shell, a flexible display screen and the folding device described above. The first shell is connected with the first rotating mechanism. The second shell is connected with the second rotating mechanism. The flexible display screen continuously covers the first shell, the base and the second shell.

DRAWINGS EXPLANATION

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0008] Fig. 1 is a schematic diagram of the overall structure of the folding device in some embodiments of the present application;

[0009] Fig. 2 is an exploded schematic diagram of the folding device in the embodiment of Fig. 1;

[0010] Fig. 3 is a schematic diagram of the base structure in the embodiment of Fig. 1;

[0011] Fig. 4 is a front view of the folding device in the embodiment of Fig. 1;

[0012] Fig. 5 is a right side view of the folding device in the embodiment of Fig. 4;

[0013] Fig. 6 is a motion diagram of the first rotating mechanism in the embodiment of Fig. 1;

[0014] Fig. 7 is a structural schematic diagram of the first rotating member in the embodiment of Fig. 1;

[0015] Fig. 8 is a structural schematic diagram of the first synchronizing member in the embodiment of Fig. 1;

[0016] Fig. 9 is a structural schematic diagram of the first connecting member in the embodiment of Fig. 1;

[0017] Fig. 10 is a structural schematic diagram of the first sliding member in the embodiment of Fig. 1;

[0018] Fig. 11 is a structural schematic diagram of the first supporting member in the embodiment of Fig. 1;

[0019] Fig. 12 is a partial structural schematic diagram of the folding device in the embodiment of Fig. 1;

[0020] Fig. 13 is a schematic diagram of the connection relationship between the first synchronizing member and the first sliding member in the folded state in the embodiment of Fig. 1;

[0021] Fig. 14 is a schematic diagram of the connection relationship between the first rotating member and the first sliding member in the folded state in the embodiment of Fig. 1;

[0022] Fig. 15 is a schematic diagram of the connection relationship between the first synchronizing member and the first sliding member in the unfolded state in the embodiment of Fig. 1;

[0023] Fig. 16 is a schematic diagram of the connection relationship between the first rotating member and the first sliding member in the unfolded state in the embodiment of Fig. 1;

[0024] Fig. 17a is a schematic diagram of the projection of the first direction and the third direction on the second plane in the embodiment of Fig. 1;

[0025] Fig. 17b is a schematic diagram of the projection of the first direction and the third direction on the second plane in another embodiment;

[0026] Fig. 17c is a schematic diagram of the projection of the first direction and the third direction on the second plane in yet another embodiment;

[0027] Fig. 17d is a schematic diagram of the projection of the first direction and the third direction on the second plane in still another embodiment;

[0028] Fig. 18 is a front view of an electronic device in a folded state in some embodiments of the present application;

[0029] Fig. 19 is a front view of the electronic device in an unfolded state in the embodiment of Fig. 18.

DETAILED DESCRIPTION

[0030] The application will be described in further detail below in connection with the accompanying drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustration of the application and do not limit the scope of the application. Similarly, the following embodiments are only part of the embodiments of the application, and all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0031] The application provides a folding device, which is a folding device capable of relative rotation to realize folding and unfolding. The folding device provided by the embodiment can be applied in various fields, such as the field of door locks, the field of vehicles, the field of machinery, the field of electronic products, and the like. The embodiment is only illustratively described by taking the folding device applied in a folding electronic device in the field of electronic products. Of course, the folding device applied in other fields also belongs to the protection scope of the application.

[0032] Please refer to FIG. 1 and FIG. 2, FIG. 1 is a schematic diagram of the overall structure of the folding device in some embodiments of the application, and FIG. 2 is an exploded schematic diagram of the folding device in the embodiment of FIG. 1. The folding device of the embodiment includes a base 100, a first rotating mechanism 200a, and a second rotating mechanism 200b. The first rotating mechanism 200a and the second rotating mechanism 200b are respectively rotatably connected to opposite sides of the base 100 to make the folding device have a folding state and an unfolding state.

[0033] It can be understood that in the application, the first rotating mechanism 200a and the second rotating mechanism 200b can be symmetrically or asymmetrically arranged relative to the base 100. For the convenience of description, the application is mainly described according to the symmetric arrangement of the first rotating mechanism 200a and the second rotating mechanism 200b, and in the following embodiments, the folding device is mainly described by taking the specific arrangement of the first rotating mechanism 200a and the connection relationship between the first rotating mechanism 200a and the base 100 as an example, and the second rotating mechanism 200b can be arranged by referring to the first rotating mechanism 200a.

[0034] Please refer to FIG. 2 and FIG. 3, FIG. 3 is a schematic diagram of the base structure in the embodiment of FIG. 1. The base 100 is a basic structural member in the folding device, mainly playing a role of supporting and mounting. The base 100 is provided with a cover plate 13, and the base 100 and the cover plate 13 together form an assembly space, so that other structural members in the folding device can be mounted inside the base 100 and the cover plate 13. Moreover, the base 100 can also play a role of supporting a to-be-supported member in some embodiments. The shape, structure, material, and the like of the base 100 are not limited in the embodiment, as long as it can provide an assembly basis for other structural members. The to-be-supported member includes but is not limited to various flexible members, or various rigid members, or other components.

[0035] It is worth mentioning that in some scenarios, the first rotating mechanism 200a and the second rotating mechanism 200b can be provided with multiple, and the multiple first rotating mechanisms 200a and the second rotating mechanisms 200b can all take the same base 100 as the bearing component to improve the integration degree of the folding device; in other scenarios, the number of the first rotating mechanism 200a, the second rotating mechanism 200b and the base 100 is the same, so that each first rotating mechanism 200a and the second rotating mechanism 200b takes the corresponding base 100 as the bearing component.

[0036] Please refer to FIG. 4, FIG. 5 and FIG. 6, FIG. 4 is a front view of the folding device in the embodiment of FIG. 1, FIG. 5 is a right side view of the folding device in the embodiment of FIG. 4, and FIG. 6 is a motion diagram of the first rotating mechanism in the embodiment of FIG. 1. In the embodiment, the first rotating mechanism 200a includes a first rotating piece 21a, a first synchronous piece 22a, a first sliding piece 24a and a first connecting piece 23a. The first rotating piece 21a is rotatably connected to the base 100 at one end around a first fixed rotating shaft 201a and rotatably connected to the first connecting piece 23a at the other end around a first active rotating shaft 203a; the first synchronous piece 22a is rotatably connected to the base 100 at one end around a first fixed synchronous shaft 202a and rotatably connected to the first connecting piece 23a at the other end around a first active synchronous shaft 204a.

[0037] It should be noted that the first rotating piece 21a and the first synchronous piece 22a can only rotate relative to the base 100 and cannot slide, the first rotating piece 21a and the base 100 form a low pair cooperation, the first synchronous piece 22a and the base 100 form a plane low pair cooperation with a degree of freedom of 1, and the specific connection structure of the first rotating piece 21a and the first synchronous piece 22a and the base 100 will be described in detail later.

[0038] Please refer to FIG. 13 and FIG. 14, FIG. 13 is a connection relationship diagram of the first synchronous piece and the first sliding piece in the folding state in the embodiment of FIG. 1, and FIG. 14 is a connection relationship diagram of the first rotating piece and the first sliding piece in the folding state in the embodiment of FIG. 1. The XY plane is the first plane C1, the YZ plane is the second plane C2, and the XZ plane is the third plane C3 in FIG. 1, wherein X, Y and Z are arranged along the length direction, the width direction and the thickness direction of the base 100, and the XY plane is located at the bottom of the base 100 and the XZ plane is located at the middle of the base 100.

[0039] The first sliding member 24a is slidably connected to one end of the first rotating member 21a away from the base 100 in a first direction Al, and is slidably connected to one end of the first synchronizing member 22a away from the base 100 in a third direction A2. In addition, the first direction Al and the third direction A2 are not parallel in the projection of the second plane C2 (not shown in the figure), in other words, an included angle between the first direction Al and the third direction A2 can be greater than 0°, that is, the first direction Al and the third direction A2 are intersected.

[0040] The present embodiment does not limit the shape, structure, material and other parameters of the first rotating member 21a, the first synchronizing member 22a, the first sliding member 24a and the first connecting member 23a, as long as one end of the first rotating member 21a and the first synchronizing member 22a can be rotatably connected to the base 100, the other end can be rotatably connected to the first connecting member 23a, and one end of the first rotating member 21a and the first synchronizing member 22a away from the base 100 is slidably connected to the first sliding member 24a.

[0041] Please refer to FIG. 6, in which H1 represents the distance from the first fixed rotating shaft 201a to the first plane C1, and H2 represents the distance from the first fixed synchronous shaft 202a to the first plane C1. The first fixed rotating shaft 201a is parallel to the first fixed synchronous shaft 202a but not coincident with the first fixed synchronous shaft 202a. The distance from the first fixed rotating shaft 201a to the first plane C1 is different from the distance from the first fixed synchronous shaft 202a to the first plane C1, i.e., the size of H1 is different from the size of H2. The first plane C1 is a reference plane that is perpendicular to the thickness direction of the base 100 and located at the bottom of the base 100. Since the first fixed rotating shaft 201a is parallel to the first fixed synchronous shaft 202a, the length of the vertical line between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a is the actual distance between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a. Since the size of H1 is different from the size of H2, i.e., the distance from the two ends of the vertical line to the first plane C1 is different, the vertical line between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a is inclined to the first plane C1, so that the projection distance of the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a on the first plane C1 is smaller than the actual distance between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a. It can be understood that, in the case that the distance from the first fixed rotating shaft 201a to the first plane C1 is the same as the distance from the first fixed synchronous shaft 202a to the first plane C1, the vertical line between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a is parallel to the first plane C1. When the vertical line between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a is inclined to the first plane C1, the width of the base 100 to be set is smaller than the width of the base 100 to be set when the vertical line between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a is parallel to the first plane C1.

[0042] Exemplarily, assuming that the length of the perpendicular line connecting the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a is L, the perpendicular line connecting the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a forms an angle (i.e. the angle shown as a in FIG. 6) with the first plane C1, when the distance from the first fixed rotating shaft 201a to the first plane C1 is different from the distance from the first fixed synchronous shaft 202a to the first plane C1, i.e. H1

[0043] Meanwhile, please continue to refer to FIG. 6, the projection of the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a on the second plane C2 is connected by a straight line to form the first fixed side 205a, and the projection of the first movable rotating shaft 203a and the first movable synchronous shaft 204a on the second plane C2 is connected by a straight line to form the first movable side 206a, the second plane C2 is a reference plane perpendicular to the first fixed rotating shaft 201a, the first fixed side 205a and the first movable side 206a are parallel to each other and have equal lengths, so that the first rotating member 21a, the first synchronous member 22a, the first connecting member 23a, and the base 100 together form a parallelogram linkage mechanism.

[0044] Please refer to FIG. 7, FIG. 8 and FIG. 9, FIG. 7 is a structural diagram of the first rotating member in the embodiment of FIG. 1, FIG. 8 is a structural diagram of the first synchronizing member in the embodiment of FIG. 1, and FIG. 9 is a structural diagram of the first connecting member in the embodiment of FIG. 1. Exemplarily, the first rotating member 21a and the first synchronizing member 22a are arranged along the length direction of the base 100, and the first connecting member 23a is arranged between the first rotating member 21a and the first synchronizing member 22a. The first connecting member 23a comprises a first rotating pin hole 231a and a first synchronizing pin hole 232a, the axes of the first rotating pin hole 231a and the first synchronizing pin hole 232a coincide with the first movable rotating shaft 203a and the first movable synchronizing shaft 204a respectively, the end of the first rotating member 21a close to the first synchronizing member 22a is provided with a first rotating fitting hole 213a, and the first rotating fitting hole 213a and the first rotating pin hole 231a are connected by a first rotating pin 234a; the end of the first synchronizing member 22a close to the first rotating member 21a is provided with a first synchronizing fitting hole 221a, and the first synchronizing fitting hole 221a and the first synchronizing pin hole 232a are connected by a first synchronizing pin 233a. Of course, the first connecting member 23a and the first rotating member 21a can also adopt other rotating connection modes, for example, a pin shaft is fixedly arranged on the first rotating member 21a, a pin hole is arranged on the end of the first connecting member 23a close to the first rotating member 21a, and the pin shaft is inserted into the pin hole to realize rotating connection, or a bearing is arranged between the first rotating member 21a and the first connecting member 23a. Similarly, the first connecting member 23a and the first synchronizing member 22a can also adopt other rotating connection modes, as long as the perpendicular line between the rotating axis of the first rotating member 21a relative to the first connecting member 23a and the rotating axis of the first synchronizing member 22a relative to the first connecting member 23a is parallel to the first fixed side 205a, and the length of the perpendicular line is equal to the length of the first fixed side 205a.

[0045] Please refer to FIG. 6 again, the length of the first fixed edge 205a is the length L of the vertical line between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a, and the length of the first movable edge 206a is the same as the length of the first fixed edge 205a. In the parallelogram linkage, the two ends of the first rotating member 21a and the first synchronous member 22a are respectively constrained by the first fixed edge 205a and the first movable edge 206a. In the folded state, the projection length of the first fixed edge 205a on the first plane C1 is the distance between the first rotating member 21a and the first synchronous member 22a close to one end of the base 100, and the projection length of the first movable edge 206a on the first plane C1 is the distance between the first rotating member 21a and the first synchronous member 22a away from one end of the base 100. The distance between the first rotating member 21a and the first synchronous member 22a, that is, the overall thickness of the first rotating member 21a and the first synchronous member 22a, is affected by the length and the inclination angle of the first fixed edge 205a and the first movable edge 206a, and then the overall thickness of the folding device in the folded state is affected by the length and the inclination angle of the first fixed edge 205a and the first movable edge 206a.

[0046] The base 100 can be regarded as a fixed member, and the first connecting member 23a can be directly regarded as the first movable edge 206a. The inclination angle of the first fixed edge 205a relative to the base 100, that is, the inclination angle of the first fixed edge 205a relative to the first plane C1 is fixed, and the angle a in FIG. 6 is the inclination angle of the first fixed edge 205a relative to the first plane C1. When the first rotating member 21a, the first synchronous member 22a, and the first connecting member 23a rotate relative to the base 100, since the first fixed edge 205a and the first movable edge 206a are parallel to each other and have the same length, the first connecting member 23a always maintains parallel to the first fixed edge 205a and has the same length. In other words, the inclination angle of the first fixed edge 205a relative to the first plane C1 determines the inclination angle of the first connecting member 23a relative to the first plane C1 during movement. When the first rotating mechanism 200a rotates to the folded state, the inclination angle of the first connecting member 23a relative to the first plane C1 is equal to the inclination angle of the first fixed edge 205a relative to the first plane C1. Since the first rotating member 21a and the first synchronous member 22a are respectively connected with the first connecting member 23a, the inclination angle of the first connecting member 23a relative to the first plane C1 affects the distance between the first rotating member 21a and the first synchronous member 22a away from one end of the base 100.

[0047] As can be seen from the foregoing, the distance from the first fixed rotating shaft 201a to the first plane C1 is different from the distance from the first fixed synchronous shaft 202a to the first plane C1, that is, the first fixed edge 205a is inclined to the first plane C1, while the first movable edge 206a is parallel to and equal to the first fixed edge 205a, and the first movable edge 206a is also inclined to the first plane C1, so that the distance from the two ends of the first rotating piece 21a to the first synchronous piece 22a in the folded state is less than the actual length L of the first fixed edge 205a. Therefore, in the folded state, the overall thickness of the first rotating piece 21a and the first synchronous piece 22a when the first fixed edge 205a is inclined to the first plane C1 is less than the overall thickness of the first rotating piece 21a and the first synchronous piece 22a when the first fixed edge 205a is parallel to the first plane C1. This setting not only can reduce the width of the base 100 required to be set, but also can reduce the thickness of the folding device in the folded state, which is conducive to the lightweight design of the folding device.

[0048] The third plane C3 in FIG. 6 is parallel to the XZ plane and located in the middle of the base 100, W1 represents the distance from the first fixed rotating shaft 21a to the third plane C3, and W2 represents the distance from the first fixed synchronous shaft 22a to the third plane C3. Optionally, the distance from the first fixed rotating shaft 201a to the first plane C1 is greater than the distance from the first fixed synchronous shaft 202a to the first plane C1, and the distance from the first fixed rotating shaft 201a to the third plane C3 is greater than the distance from the first fixed synchronous shaft 202a to the third plane C3, that is, H1>H2, and W1>W2, at this time 90°<α<180°, the first fixed edge 205a and the first movable edge 206a are inclined to the first plane C1, the projection length of the first fixed edge 205a on the first plane C1 is less than the actual length of the first fixed edge 205a, and the projection length of the first movable edge 206a on the first plane C1 is less than the actual length of the first movable edge 206a. This setting mode can reduce the thickness of the first rotating mechanism 200a in the folded state to a certain extent.

[0049] Optionally, the distance from the first fixed rotating shaft 201a to the first plane C1 is greater than the distance from the first fixed synchronous shaft 202a to the first plane C1, and the distance from the first fixed rotating shaft 201a to the third plane C3 is equal to the distance from the first fixed synchronous shaft 202a to the third plane C3. That is, H1>H2, and W1=W2, at this time α=90°, this setting mode can make the thickness of the first rotating mechanism 200a in the folded state reach the thinnest, but since the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a are in the same vertical plane, in the folded state, the folding object will generate pressure on the side of the first rotating mechanism 200a close to the second rotating mechanism 200b, resulting in insufficient stability of the first rotating mechanism 200a.

[0050] Optionally, the distance from the first fixed rotating shaft 201a to the first plane C1 is greater than the distance from the first fixed synchronous shaft 202a to the first plane C1, and the distance from the first fixed rotating shaft 201a to the third plane C3 is less than the distance from the first fixed synchronous shaft 202a to the third plane C3. That is, H1>H2, and W1<W2, and 0°<α<90°, in the folding state, that is, when the first rotating piece 21a rotates by 90°, the first rotating piece 21a can generate an upward and close-to-folding-to-be-folded-piece direction force on the first connecting piece 23a, facilitating the first connecting piece 23a to support the first sliding piece 24a and the folding-to-be-folded piece, and improving the stability of the structure. Optionally, 60°<α<70°, so as to meet the thinning design of the first rotating mechanism 200a in the folding state, and ensure the smoothness of the movement process of the first rotating mechanism 200a and the stability of the structure.

[0051] In the conventional technology, in order to realize synchronous flipping, stable support and the like of the folding device in a limited space, different multiple movable members need to be designed to meet the requirements, the movement trajectories of the multiple movable members are not unique, so that the reliability of the structure in the folding state is reduced, and the connection relationship of the multiple movable members affects the thickness of the device in the folding state.

[0052] In the folding device provided by the embodiment of the present application, when the folding device is in a static state, since the first direction A1 is not parallel to the third direction A2, the first sliding piece 24a cannot slide relative to the first rotating piece 21a and the first synchronous piece 22a, thereby improving the stability of the device; when the folding device is in a movement process, the first sliding piece 24a slides relative to the first rotating piece 21a and the first synchronous piece 22a, drives the first rotating piece 21a and the first synchronous piece 22a to rotate, and the first rotating piece 21a, the first synchronous piece 22a, the first connecting piece 23a and the base 100 form a parallelogram linkage mechanism, which can realize the uniqueness and reliability of the movement trajectory of the first rotating piece 21a, the first synchronous piece 22a and the first connecting piece 23a in the rotating process; relatively, since the first direction A1 is not parallel to the third direction A2, the first rotating piece 21a and the first synchronous piece 22a rotate to drive the first sliding piece 24a to slide along the first direction A1 and the third direction A2 respectively, thereby ensuring the uniqueness of the movement trajectory of the first sliding piece 24a relative to the parallelogram linkage mechanism, that is, the uniqueness and reliability of the movement trajectory of the movable members in the first rotating mechanism 200a.

[0053] Based on the above connection relationship, the folding device can not only be folded but also move according to the preset folding track to obtain the required folding form. When the first sliding piece 24a rotates relative to the base 100, the first rotating piece 21a and the first synchronous piece 22a are driven to rotate relative to the base 100. Since the first sliding piece 24a can slide relative to the first rotating piece 21a and the first synchronous piece 22a respectively and the sliding directions are not parallel, it can be considered that when the first sliding piece 24a slides relative to the first rotating piece 21a along the first direction A1, the first sliding piece 24a is restricted by the first synchronous piece 22a; or it can be understood that when the first sliding piece 24a slides relative to the first synchronous piece 22a along the third direction A2, the movement of the first sliding piece 24a is restricted by the first rotating piece 21a. It should be noted that the restriction here does not mean complete restriction of relative movement, but means that during the movement of the first rotating mechanism 200a, the first rotating piece 21a and the first synchronous piece 22a restrict each other to avoid instantaneous large displacement of the first sliding piece 24a relative to the first rotating piece 21a or the first synchronous piece 22a. Moreover, the first rotating piece 21a and the first synchronous piece 22a are connected by the first connecting piece 23a, which improves the combination degree between the first rotating piece 21a and the first synchronous piece 22a and is beneficial to the mutual restriction between the first rotating piece 21a and the first synchronous piece 22a. In this way, even if the electronic device applied with the folding device falls in the folded state, the risk of instantaneous large displacement of the first sliding piece 24a relative to the first rotating piece 21a or the first synchronous piece 22a in this state can be effectively reduced, so as to ensure the reliability of the overall structure of the electronic device.

[0054] Further, in the present application, by limiting the distance of the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a relative to the first plane C1, the first fixed side 205a is inclined to the first plane C1. In this way, the width of the base 100 required to be set can be reduced, and the inclination angle of the first connecting piece 23a relative to the first plane C1 is limited, that is, the distance between the first rotating piece 21a and the first synchronous piece 22a when they rotate to the folded state is limited. Compared with the case where the first connecting piece 23a is parallel to the first plane C1, the first rotating mechanism 200a in the folded state is thinner in the present embodiment.

[0055] Referring to FIG. 2, in some embodiments, the second rotating mechanism 200b is symmetrically arranged with the first rotating mechanism 200a, and the second rotating mechanism 200b comprises a second rotating piece 21b, a second synchronous piece 22b, a second sliding piece 24b, and a second connecting piece 23b, wherein one end of the second rotating piece 21b is rotatably connected to the base 100 around a second fixed rotating shaft 201b, and the other end is rotatably connected to the second connecting piece 23b around a second movable rotating shaft 203b; one end of the second synchronous piece 22b is rotatably connected to the base 100 around a second fixed synchronous shaft 202b, and the other end is rotatably connected to the second connecting piece 23b around a second movable synchronous shaft 204b.

[0056] The second fixed rotating shaft 201b, the second movable rotating shaft 203b, the second fixed synchronous shaft 202b, and the second movable synchronous shaft 204b are parallel and do not coincide (not shown in the figure), the distance from the second fixed rotating shaft 201b to the first plane C1 is different from the distance from the second fixed synchronous shaft 202b to the first plane C1; the projection of the second fixed rotating shaft 201b and the second fixed synchronous shaft 202b on the second plane C2 is connected by a straight line to form a second fixed edge 205b, the projection of the second movable rotating shaft 203b and the second movable synchronous shaft 204b on the second plane C2 is connected by a straight line to form a second movable edge 206b, the second fixed edge 205b and the second movable edge 206b are parallel to each other and have equal lengths, so that the second rotating piece 21b, the second synchronous piece 22b, the second connecting piece 23b, and the base 100 collectively form a parallelogram linkage mechanism.

[0057] Exemplarily, the second rotating member 21b and the second synchronous member 22b are arranged along the length direction of the base 100, the second connecting member 23b is arranged between the second rotating member 21b and the second synchronous member 22b, the second connecting member 23b comprises a second rotating pin hole 231b and a second synchronous pin hole 232b, the axes of the second rotating pin hole 231b and the second synchronous pin hole 232b coincide with the second movable rotating shaft 203b and the second movable synchronous shaft 204b respectively, the end of the second rotating member 21b close to the second synchronous member 22b is provided with a second rotating fitting hole 213b, the second rotating fitting hole 213b is connected with the second rotating pin hole 231b through a second rotating pin 234b; the end of the second synchronous member 22b close to the second rotating member 21b is provided with a second synchronous fitting hole 221b, the second synchronous fitting hole 221b is connected with the second synchronous pin hole 232b through a second synchronous pin 233b. Of course, the second connecting member 23b and the second rotating member 21b can also adopt other rotating connection modes, for example, a pin shaft is fixedly arranged on the second rotating member 21b, a pin hole is arranged on the end of the second connecting member 23b close to the second rotating member 21b, and the pin shaft is inserted into the pin hole to realize rotating connection, or a bearing is arranged between the second rotating member 21b and the second connecting member 23b. Similarly, the second connecting member 23b and the second synchronous member 22b can also adopt other rotating connection modes, as long as the perpendicular line between the rotating axis of the second rotating member 21b relative to the second connecting member 23b and the rotating axis of the second synchronous member 22b relative to the second connecting member 23b is parallel to the fixed side, and the length of the perpendicular line is equal to the fixed side.

[0058] Optionally, in some scenarios, the distance from the second fixed rotating shaft 201b to the first plane C1 is greater than the distance from the second fixed synchronous shaft 202b to the first plane C1, and the distance from the second fixed rotating shaft 201b to the third plane C3 is greater than the distance from the second fixed synchronous shaft 202b to the third plane C3.

[0059] Optionally, in some scenarios, the distance from the second fixed rotating shaft 201b to the first plane C1 is greater than the distance from the second fixed synchronous shaft 202b to the first plane C1, and the distance from the second fixed rotating shaft 201b to the third plane C3 is equal to the distance from the second fixed synchronous shaft 202b to the third plane C3.

[0060] Optionally, in some scenarios, the distance from the second fixed rotating shaft 201b to the first plane C1 is greater than the distance from the second fixed synchronous shaft 202b to the first plane C1, and the distance from the second fixed rotating shaft 201b to the third plane C3 is less than the distance from the second fixed synchronous shaft 202b to the third plane C3.

[0061] Please refer to FIG. 13 and FIG. 14, the second sliding member 24b is slidably connected to the second rotating member 21b at an end away from the base 100 in the second direction B1, and the second sliding member 24b is slidably connected to the second synchronizing member 22b at an end away from the base 100 in the fourth direction B2, the projection of the second direction B1 and the fourth direction B2 on the second plane C2 are not parallel.

[0062] The present embodiment does not limit the shape, structure, material, and other parameters of the second rotating member 21b, the second synchronizing member 22b, the second sliding member 24b, and the second connecting member 23b, as long as one end of the second rotating member 21b and the second synchronizing member 22b can be rotatably connected to the base 100, the other end can be rotatably connected to the second connecting member 23b, and the end of the second rotating member 21b and the second synchronizing member 22b away from the base 100 is slidably connected to the second sliding member 24b.

[0063] Please refer to FIG. 2 and FIG. 4, in some embodiments, the first rotating mechanism 200a further comprises a first support member 25a, the first rotating member 21a and the first synchronizing member 22a are arranged between the first support member 25a and the base 100, the first support member 25a is rotatably connected to the first sliding member 24a, and is also slidably and rotatably connected to at least one of the first rotating member 21a and the first synchronizing member 22a. When the first rotating mechanism 200a and the second rotating mechanism 200b are rotated towards each other to the folded state, the distance from the end of the first support member 25a away from the base 100 to the second rotating mechanism 200b is less than the distance from the end of the first support member 25a close to the base 100 to the second rotating mechanism 200b.

[0064] Similarly, the second rotating mechanism 200b further comprises a second support member 25b, the second rotating member 21b and the second synchronizing member 22b are arranged between the second support member 25b and the base 100, the second support member 25b is rotatably connected to the second sliding member 24b, and is also slidably and rotatably connected to at least one of the second rotating member 21b and the second synchronizing member 22b. When the second rotating mechanism 200b and the second rotating mechanism 200b are rotated towards each other to the folded state, the distance from the end of the second support member 25b away from the base 100 to the first rotating mechanism 200a is less than the distance from the end of the second support member 25b close to the base 100 to the first rotating mechanism 200a.

[0065] It should be noted that the above-mentioned rotation can be understood as the circumferential motion of the two moving members around the rotation axis, and the sliding can be understood as the parallel motion of the two moving members, only the displacement changes, and there is no change in angle. The sliding and rotation of the two moving members means that the two moving members have both displacement changes and angle changes, and this sliding and rotation can also be referred to as rolling.

[0066] The present embodiment does not limit the shape, structure, material and other parameters of the first support 25a and the second support 25b, as long as the first support 25a can support the to-be-folded member and rotationally connect the first sliding member 24a, at least one of the first rotating member 21a and the first synchronous member 22a; and the second support 25b can support the to-be-folded member and rotationally connect the second sliding member 24b, at least one of the second rotating member 21b and the second synchronous member 22b.

[0067] Referring to FIG. 11, which is a structural schematic diagram of the first support in the embodiment of FIG. 1, the first support 25a and the second support 25b are mainly used for supporting the to-be-folded member in the folding device, the first support 25a includes a first support portion 251a, and the second support 25b includes a second support portion 251b. The first support portion 251a and the second support portion 251b can be fixedly connected with the to-be-folded member, and both the first support portion 251a and the second support portion 251b are rectangular plate structures.

[0068] The first support 25a and the second support 25b are driven mechanisms of the folding device. The first support 25a moves under the restriction of the movement track of the first rotating mechanism 200a, and the second support 25b moves under the restriction of the movement track of the second rotating mechanism 200b, so as to finally realize the required folding shape. In the present embodiment, when the first rotating mechanism 200a and the second rotating mechanism 200b rotate towards each other to the folding state, the distance from the end of the first support 25a away from the base 100 to the second rotating mechanism 200b is less than the distance from the end of the first support 25a close to the base 100 to the second rotating mechanism 200b, and the distance from the end of the second support 25b away from the base 100 to the first rotating mechanism 200a is less than the distance from the end of the second support 25b close to the base 100 to the first rotating mechanism 200a. It can be understood that the distance between the ends of the first support 25a and the second support 25b away from the base 100 is less than the distance between the ends of the first support 25a and the second support 25b close to the base 100, that is, the first support 25a and the second support 25b form a splayed shape relative to the base 100, so as to avoid the flexible to-be-folded member, avoid extrusion on the to-be-folded member, and make the to-be-folded member fold into a continuous water-drop shape.

[0069] As mentioned above, the first support 25a is slidably and rotatably connected to at least one of the first rotating member 21a and the first synchronous member 22a. Three specific embodiments are introduced in this application: the first support 25a is slidably and rotatably connected to the first synchronous member 22a, the first support 25a is slidably and rotatably connected to the first rotating member 21a, and the first support 25a is slidably and rotatably connected to both the first rotating member 21a and the first synchronous member 22a.

[0070] Referring to FIG. 8 and FIG. 11, for the first embodiment, the first support 25a and the first synchronous member 22a are connected through the first limiting portion 222a and the first sliding portion 252a. The first limiting portion 222a is arranged on one of the first support 25a and the first synchronous member 22a, and the first sliding portion 252a is arranged on the other one of the first support 25a and the first synchronous member 22a.

[0071] In this embodiment, the first limiting portion 222a is arranged on the first synchronous member 22a, and the first sliding portion 252a is arranged on the first support 25a. For example, the first sliding portion 252a is arranged on the side of the first support portion 251a away from the to-be-folded member. The first sliding portion 252a includes an inner sliding surface 25211a and an outer sliding surface 25222a. The first limiting portion 222a includes an inner limiting block 2221a arranged on the inner sliding surface 25211a close to the to-be-folded member, and an outer limiting block 2222a arranged on the outer sliding surface 25222a away from the to-be-folded member. The inner sliding surface 25211a and the inner limiting block 2221a are slidably and rotatably connected, and the outer sliding surface 25222a and the outer limiting block 2222a are slidably and rotatably connected. When the first rotating mechanism 200a and the second rotating mechanism 200b rotate towards each other to the folded state, the inner limiting block 2221a and the inner sliding surface 25211a guide and limit the first support 25a to make the distance from the end of the first support 25a away from the base 100 to the second rotating mechanism 200b smaller than the distance from the end of the first support 25a close to the base 100 to the second rotating mechanism 200b. When the first rotating mechanism 200a and the second rotating mechanism 200b rotate away from each other to the unfolded state, the outer limiting block 2222a and the outer sliding surface 25222a guide and limit the first support 25a to make the first support 25a parallel to the second plane C2.

[0072] It can be understood that the inner sliding surface 25211a and the outer sliding surface 25222a can be oppositely arranged, that is, the inner sliding surface 25211a and the outer sliding surface 25222a can be mutually parallel but non-coincident curved surfaces, and the two can be opposite sides provided on the same component, or can be formed on the opposite sides of the first support part 251a by different components respectively; in order to make the folding device more lightweight, the inner sliding surface 25211a and the outer sliding surface 25222a can also be mutually coincident curved surfaces, as shown in FIG. 11, the first sliding part 252a includes the inner arc-shaped block 2521a and the outer arc-shaped block 2522a which are mutually superimposed, the superimposed position of the inner arc-shaped block 2521a and the outer arc-shaped block 2522a forms a continuous matching surface, the inner sliding surface 25211a is formed on the outer arc-shaped block 2522a, the outer sliding surface 25222a is formed on the inner limiting block 2221a, and the inner sliding surface 25211a and the outer sliding surface 25222a partially overlap to form the matching surface of the inner arc-shaped block 2521a and the outer arc-shaped block 2522a.

[0073] Optionally, the inner limiting block 2221a and the outer limiting block 2222a are both plate-shaped. Exemplarily, the first synchronous part 22a is provided with a first notch 223a on the side away from the base 100, and the inner limiting block 2221a and the outer limiting block 2222a are respectively arranged on the two side walls of the first notch 223a along the length direction of the base 100, and the inner limiting block 2221a and the outer limiting block 2222a can be rectangular, triangular or polygonal plate-shaped structures. In this way, when the inner limiting block 2221a and the inner sliding surface 25211a slide and rotate in cooperation and the outer limiting block 2222a and the outer sliding surface 25222a slide and rotate in cooperation, the connection strength of the first synchronous part 22a can be ensured, and at the same time the first synchronous part 22a can be made thinner, which is beneficial to the lightweight design of the folding device.

[0074] Optionally, the inner limiting block 2221a and the outer limiting block 2222a are arranged at intervals along the movement direction of the first support part 25a relative to the first synchronous part 22a. Exemplarily, the inner limiting block 2221a and the outer limiting block 2222a are both arranged on the first synchronous part 22a, and the distance from the inner limiting block 2221a to the rotation axis of the first synchronous part 22a is different from the distance from the outer limiting block 2222a to the rotation axis of the first synchronous part 22a.

[0075] Please refer to FIG. 7 and FIG. 11, for the second embodiment, the first support 25a and the first rotating member 21a are connected through the first guiding part 253a and the first rolling part 214a, the first guiding part 253a is arranged on one of the first support 25a and the first rotating member 21a, and the first rolling part 214a is arranged on the other one of the first support 25a and the first rotating member 21a. In this embodiment, only the first guiding part 253a is arranged on the first support 25a, and the first rolling part 214a is arranged on the first rotating member 21a. Exemplarily, the first guiding part 253a comprises a first guiding hole 2531a arranged on the first support part 251a away from the to-be-folded member, and the first rolling part 214a comprises a first rolling shaft 2141a arranged on the first rotating member 21a, the first rolling shaft 2141a can be inserted into the first guiding hole 2531a and slide and rotate relative to the first guiding hole 2531a, so as to make the first support 25a slide and rotate relative to the first rotating member 21a.

[0076] In addition, the first rolling shaft 2141a can be fixedly connected with the first rotating member 21a, or can be rotatably connected. For example, in this embodiment, the first rolling shaft 2141a is arranged on the first rotating member 21a, and the first rolling shaft 2141a is fixedly connected with the first rotating member 21a to keep the first rolling shaft 2141a relatively stationary relative to the first rotating member 21a, so as to make the first guiding hole 2531a slide and rotate relative to the first rolling shaft 2141a.

[0077] Optionally, the first guiding hole 2531a can be a through hole penetrating the first guiding part 253a, or can be a non-penetrating blind hole.

[0078] Optionally, the first guiding hole 2531a can be an arc-shaped slot, or can be a straight-line-shaped slot.

[0079] For the third embodiment, the first support 25a is simultaneously connected with the first rotating member 21a and the first synchronous member 22a through sliding and rotating. Exemplarily, the first support 25a and the first synchronous member 22a are connected through the first limiting part 222a and the first sliding part 252a, the first limiting part 222a is arranged on one of the first support 25a and the first synchronous member 22a, and the first sliding part 252a is arranged on the other one of the first support 25a and the first synchronous member 22a; the first support 25a and the first rotating member 21a are connected through the first guiding part 253a and the first rolling part 214a, the first guiding part 253a is arranged on one of the first support 25a and the first rotating member 21a, and the first rolling part 214a is arranged on the other one of the first support 25a and the first rotating member 21a.

[0080] For the first support 25a sliding relative to the first synchronous member 22a and rotating connection can be referred to the first embodiment has been described in detail above, for the first support 25a relative to the first rotating member 21a sliding and rotating connection can be referred to the second embodiment has been described in detail above. In other words, the third embodiment provided by the present application is to meet the first embodiment and the second embodiment, therefore for the third embodiment, the present application will not repeat here, please refer to the two kinds of above-mentioned embodiments.

[0081] It can be understood that the above-mentioned first rotating member 21a and the first support 25a connection structure, and the first synchronous member 22a and the first support 25a connection structure is to realize the same function of two different connection structure, therefore the first rotating member 21a and the first support 25a connection structure and the first synchronous member 22a and the first support 25a connection structure can be replaced with each other.

[0082] That is, in the first embodiment, the first support 25a and the first synchronous member 22a through the first guide part 253a and the first rolling part 214a cooperation connection, the first guide part 253a is arranged in one of the first support 25a and the first synchronous member 22a, the first rolling part 214a is arranged in the other one of the first support 25a and the first synchronous member 22a.

[0083] In the second embodiment, the first support 25a and the first rotating member 21a through the first limiting part 222a and the first sliding part 252a cooperation connection, the first limiting part 222a is arranged in one of the first support 25a and the first synchronous member 22a, the first sliding part 252a is arranged in the other one of the first support 25a and the first rotating member 21a. In the third embodiment, those skilled in the art can combine the above-mentioned first embodiment and the second embodiment according to the actual situation.

[0084] Referring to FIG. 10 and FIG. 11, FIG. 10 is a structural schematic diagram of the first sliding piece in the embodiment of FIG. 1. In addition to the rotationally and slidingly connecting with the first rotating piece 21a and / or the first synchronous piece 22a, the first supporting piece 25a is also rotationally connected with the first sliding piece 24a, that is, the end of the first supporting piece 25a away from the base 100 is rotationally connected with the first sliding piece 24a. Specifically, a first rotation guiding part and a first rotation matching part 254a are arranged between the first supporting piece 25a and the first sliding piece 24a, the first rotation guiding part is arranged on one of the first supporting piece 25a and the first sliding piece 24a, and the first rotation matching part 254a is arranged on the other one of the first supporting piece 25a and the first rotating piece 21a. The first rotation guiding part includes a first rotation slot 243a, the first rotation matching part 254a includes a first rotation block 2541a, the first rotation slot 243a is in a circular arc shape, and the first rotation block 2541a is in clearance fit with the first rotation slot 243a and slides in the first rotation slot 243a. In some scenarios, the first rotation block 2541a is arranged on the first supporting piece 25a, and the first rotation slot 243a is arranged on the first sliding piece 24a; in other scenarios, the first rotation block 2541a is arranged on the first sliding piece 24a, and the first rotation slot 243a is arranged on the first supporting piece 25a. This embodiment only illustrates that the first rotation matching part 254a is arranged on the first supporting piece 25a, the first rotation matching part 254a is arranged on the side of the first supporting part 251a away from the to-be-folded piece, and the first rotation matching part 254a and the first supporting part 251a can be in an integrated structure or a split structure. When the first rotation matching part 254a and the first supporting part 251a are in the integrated structure, the first rotation matching part 254a and the first supporting part 251a are prepared by one process, but for the convenience of understanding, the first rotation matching part 254a and the first supporting part 251a are artificially named differently. When the first rotation matching part 254a and the first supporting part 251a are in the split structure, the first rotation matching part 254a and the first supporting part 251a are prepared separately and then connected together by various methods. Further optionally, the first rotation matching part 254a, the first sliding part 252a, and the first guiding part 253a are all arranged on the first supporting part 251a, and the first rotation matching part 254a, the first sliding part 252a, and the first guiding part 253a are all located on the side of the first supporting part 251a away from the to-be-folded piece, and the first rotation matching part 254a, the first sliding part 252a, the first guiding part 253a, and the first supporting part 251a are all in an integrated structure, that is, the first rotation matching part 254a, the first supporting part 251a, the first sliding part 252a, and the first guiding part 253a are all prepared by one process.Or four are split structure, that is, the first rotating part 254a, the first support part 251a, the first sliding part 252a and the first guiding part 253a are separately prepared, and then combined together through various methods. Or part of the four is an integral structure, and the remaining part is a split structure, that is, part of the first rotating part 254a, the first support part 251a, the first sliding part 252a and the first guiding part 253a is prepared in one process, and the remaining part is separately prepared, and then combined together through various methods.

[0085] Please refer to FIG. 3 and FIG. 7, FIG. 3 is a schematic diagram of the base structure in the embodiment of FIG. 1. In some embodiments, the base 100 is provided with a first arc-shaped slot 11a, and the first rotating part 21a is provided with a first arc-shaped rotating block 211a at one end for rotating connection with the base 100. The first arc-shaped rotating block 211a is accommodated in the first arc-shaped slot 11a and can rotate along the arc surface of the first arc-shaped slot 11a. The axis corresponding to the first arc-shaped slot 11a is the first fixed rotating shaft 201a, and the axis of the first fixed rotating shaft 201a can be located inside the base 100 or outside the base 100, for example, the axis of the first fixed rotating shaft 201a is located on the base 100. When the first rotating mechanism 200a rotates from the unfolded state to the folded state, the first arc-shaped rotating block 211a moves in the direction of sliding out of the first arc-shaped slot 11a, so that the first arc-shaped rotating block 211a corresponds to the inner part of the first arc-shaped slot 11a and is reduced.

[0086] The first rotating part 21a can also be connected with the base 100 through a solid shaft. For example, the first fixed rotating shaft 201a is in a cylindrical shape, the first fixed rotating shaft 201a is arranged in the base 100, and the first fixed rotating shaft 201a does not rotate relative to the base 100. The first rotating shaft can be fixedly connected to the base 100, and the first rotating part 21a is sleeved on the first fixed rotating shaft 201a and rotates around the first fixed rotating shaft 201a.

[0087] Please refer to FIG. 3 and FIG. 8, the first fixed synchronous shaft 202a can be in a cylindrical shape, the first synchronous part 22a is sleeved on the first fixed synchronous shaft 202a and rotates around the first fixed synchronous shaft 202a, the first fixed synchronous shaft 202a is arranged in the base 100, and the first rotating part 21a is sleeved on the first fixed rotating shaft 201a and rotates around the first fixed rotating shaft 201a. The first synchronous part 22a and the base 100 can also be connected through an arc-shaped slot and an arc-shaped block, which can be referred to the structure of the first rotating part 21a connected with the base 100 through the first arc-shaped slot 11a and the first arc-shaped block. The present application only takes the first fixed synchronous shaft 202a in a cylindrical shape as an example.

[0088] The above has mentioned that in some embodiments, the sliding direction of the first sliding member 24a relative to the first rotating member 21a and the first synchronizing member 22a can be non-parallel, so as to limit the sliding of the first sliding member 24a relative to the first rotating member 21a and the first synchronizing member 22a in the static state. In the process of rotation, the non-parallel sliding direction is used to drive the first sliding member 24a to slide relative to the first rotating member 21a and the first synchronizing member 22a through the first rotating member 21a and the first synchronizing member 22a. In the specific arrangement of the first rotating member 21a, the first synchronizing member 22a and the first sliding member 24a, the sliding block and the sliding groove can be used to realize the sliding of the first rotating member 21a and the first synchronizing member 22a relative to the first sliding member 24a in the present embodiment.

[0089] For example, referring to FIG. 7 and FIG. 10, the first sliding member 24a is provided with a first sliding groove 241a in the first direction A1, and the first rotating member 21a is provided with a first sliding block 212a which can slide along the first sliding groove 241a and is in clearance fit with the first sliding groove 241a. It can be understood that the first sliding member 24a can include a first inner side surface 245a and a first outer side surface 246a arranged oppositely, and the first inner side surface 245a can be a surface close to the folding member. The first direction A1 can be a direction in which the first inner side surface 245a faces the first outer side surface 246a, or a direction in which the first outer side surface 246a faces the first inner side surface 245a. Further, the first sliding block 212a is arranged along the thickness direction of the first rotating member 21a, and the first sliding groove 241a penetrates through the first inner side surface 245a and the first outer side surface 246a of the first sliding member 24a, so that the first sliding block 212a can partially exit or enter the first sliding groove 241a.

[0090] Referring to FIG. 8 and FIG. 10, the first sliding member 24a is provided with a third sliding groove 242a in a third direction A2, and the first synchronizing member 22a is provided with a third sliding block 224a which can slide along the third sliding groove 242a and is in clearance fit with the third sliding groove 242a. The third direction A2 can be a direction in which the first sliding member 24a moves towards or away from the base 100. The cooperation of the third sliding block 224a and the third sliding groove 242a can provide guidance for the sliding between the first sliding member 24a and the first synchronizing member 22a. The third sliding block 224a can be clamped in the third sliding groove 242a to prevent the first synchronizing member 22a from being separated from the first sliding member 24a, thereby improving the stability of the movement of the first synchronizing member 22a.

[0091] Referring to FIG. 10, optionally, the first sliding groove 241a and the third sliding groove 242a are arranged on the first sliding member 24a in the length direction of the first sliding member 24a.

[0092] Please refer to FIG. 12 and FIG. 15, FIG. 12 is a schematic diagram of a partial structure of the folding device in the embodiment of FIG. 1, and FIG. 15 is a schematic diagram of the connection relationship between the first synchronization member and the first sliding member in the unfolded state of the embodiment of FIG. 1. Alternatively, the third sliding groove 242a is a straight sliding groove, and when the folding device is in the unfolded state, the distance from one end of the third sliding groove 242a close to the base 100 to the bottom of the base 100 is less than the distance from the other end of the third sliding groove 242a away from the base 100 to the bottom of the base 100. That is, in the unfolded state, the third sliding groove 242a is arranged to be inclined to the base 100 upward. Since the first sliding member 24a can move away from the base 100 in the third direction A2 relative to the first synchronization member 22a during the rotation of the first rotating mechanism 200a from the unfolded state to the folded state, in the folded state, the first sliding member 24a is closer to the folding object. For example, assuming that the inclination angle of the third sliding groove 242a relative to the first plane C1 is 10° in the unfolded state, when the first synchronization member 22a rotates 90° to the folded state, it is equivalent to that the first sliding member 24a also rotates 90°, and the inclination angle of the third sliding groove 242a relative to the first plane C1 is 110°. Then, when the first sliding member 24a slides away from the base 100 along the third sliding groove 242a, the first sliding member 24a is closer to the folding object than the first synchronization member 22a, and can support one end of the folding object away from the base 100 by the first sliding member 24a. In this way, the rotation angle of the first synchronization member 22a can be reduced, since the first rotating member 21a rotates synchronously with the first synchronization member 22a, that is, the rotation angle of the first rotating member 21a and the first synchronization member 22a is reduced. In the folded state, the first rotating member 21a or the first synchronization member 22a can be prevented from being pressed against the screen due to the reduced angle. On the other hand, the clearance between the first synchronization member 22a, the first rotating member 21a and the folding object can be increased to avoid being squeezed. At the same time, the fitting amount of the first synchronization member 22a and the first rotating member 21a to the base 100 in the folded state is increased, and the structural reliability of the first rotating mechanism 200a is improved.

[0093] Please refer to FIG. 16, which is a schematic diagram of the connection relationship between the first rotating member and the first sliding member in the unfolded state of the embodiment of FIG. 1. Alternatively, the first sliding groove 241a is a straight sliding groove. When the folding device is in the unfolded state, the distance from one end of the straight sliding groove close to the base 100 to the bottom of the base 100 is less than the distance from the other end of the straight sliding groove away from the base 100 to the bottom of the base 100. In this way, the smoothness of the first sliding block 212a sliding along the first sliding groove 241a can be improved, and the interference of other structures in the first rotating shaft mechanism to the movement of the first rotating member 21a can be reduced.

[0094] Similarly, the second sliding member 24b is provided with a second sliding groove 241b in the second direction B1, and the second rotating member 21b is provided with a second sliding block 212b which can slide in the second sliding groove 241b and is in clearance fit with the second sliding groove 241b. It can be understood that the second sliding member 24b can include a second inner side 245b and a second outer side 246b which are oppositely arranged, and the second inner side 245b can be a side close to the to-be-folded member. The second direction B1 can be a direction in which the second inner side 245b faces the second outer side 246b (not shown in the figure), or a direction in which the second outer side 246b faces the second inner side 245b. Further, the second sliding block 212b is arranged in the thickness direction of the second rotating member 21b, and the second sliding groove 241b penetrates through the second inner side 245b and the second outer side 246b of the second sliding member 24b, so that the second sliding block 212b can partially exit or enter the second sliding groove 241b.

[0095] The second sliding member 24b is provided with a fourth sliding groove 242b in a fourth direction B2, and the second synchronous member 22b is provided with a fourth sliding block 224b which can slide in the fourth sliding groove 242b and is in clearance fit with the fourth sliding groove 242b. The fourth direction B2 can be a direction in which the second sliding member 24b moves towards or away from the base 100. The cooperation between the fourth sliding block 224b and the fourth sliding groove 242b can provide guidance for the sliding between the second sliding member 24b and the second synchronous member 22b. The fourth sliding block 224b can be clamped in the fourth sliding groove 242b to prevent the second synchronous member 22b from being separated from the second sliding member 24b, thereby improving the stability of the movement of the second synchronous member 22b.

[0096] Please refer to FIG. 17a, which is a schematic diagram of the projection of the first direction and the third direction on the second plane in the embodiment of FIG. 1. Optionally, the first sliding groove 214a and the third sliding groove 242a are both linear sliding grooves, and the first direction A1 and the third direction A2 extend in a straight line.

[0097] Please refer to FIG. 17b, which is a schematic diagram of the projection of the first direction and the third direction on the second plane in another embodiment. Optionally, the first sliding groove 241a is an arc-shaped sliding groove, and the third sliding groove 242a is a linear sliding groove. The first direction A1 extends in an arc line, and the third direction A2 extends in a straight line. When the folding device is in the unfolded state, the axis of the arc-shaped sliding groove is located on the side of the arc-shaped sliding groove away from the base 100. The arc-shaped sliding groove can improve the smoothness of the sliding of the first sliding block 212a along the first sliding groove 241a and reduce the interference of other structures in the first rotating shaft mechanism with the movement of the first rotating member 21a.

[0098] Please refer to FIG. 17c and FIG. 17d, FIG. 17c is a schematic diagram of the projection of the first direction and the third direction on the second plane in another embodiment, and FIG. 17d is a schematic diagram of the projection of the first direction and the third direction on the second plane in another embodiment. It should be noted that in the present embodiment, the projection of the first direction A1 and the third direction A2 on the second plane C2 is not parallel, and the projection of the second direction B1 and the fourth direction B2 on the second plane C2 is not parallel, in addition to the intersection as shown in FIG. 17b, it can also refer to the tangential relationship as shown in FIG. 17c, or the relationship of being apart as shown in FIG. 17d.

[0099] Please refer to FIG. 13 to FIG. 16, when the first rotating mechanism 200a and the second rotating mechanism 200b are rotated towards each other to the folding state, the first rotating part 21a can slide along the first direction A1, and the first synchronous part 22a can slide along the third direction A2. In this process, the first sliding part 24a can move away from the base 100 relative to the first synchronous part 22a, and drive the first rotating part 21a and the first synchronous part 22a to rotate around the base 100, so that the first sliding block 212a of the first rotating part 21a moves along the first sliding groove 241a from the first inner side surface 245a of the first sliding part 24a to the first outer side surface 246a, and the end of the first supporting part 25a away from the base 100 rotates around the first sliding part 24a, the end of the first supporting part 25a close to the base 100 slides and rotates relative to the first synchronous part 22a and the first rotating part 21a, so that the end of the first supporting part 25a close to the base 100 extends away from the middle surface of the base 100. Similarly, the second rotating part 21b can slide along the second direction B1, and the second synchronous part 22b can slide along the fourth direction B2. In this process, the second sliding part 24b can move away from the base 100 relative to the second synchronous part 22b, and drive the second rotating part 21b and the second synchronous part 22b to rotate around the base 100, so that the second sliding block 212b of the second rotating part 21b moves along the second sliding groove 241b from the second outer side surface 246b of the second sliding part 24b to the second inner side surface 245b, and the end of the second supporting part 25b away from the base 100 rotates around the second sliding part 24b, the end of the second supporting part 25b close to the base 100 slides and rotates relative to the second synchronous part 22b and the second rotating part 21b, so that the end of the second supporting part 25b close to the base 100 extends away from the middle surface of the base 100, i.e. the XZ plane.

[0100] In the rotating process, the first rotating member 21a, the first synchronous member 22a, the first connecting member 23a and the base 100 always transform in the shape of parallelogram linkage, the second rotating member 21b, the second synchronous member 22b, the second connecting member 23b and the base 100 always transform in the shape of parallelogram linkage, so as to ensure the combination degree of the first rotating member 21a and the first synchronous member 22a, and the combination degree of the second rotating member 21b and the second synchronous member 22b, and control the thickness of the folding device in the folded state.

[0101] It can be understood that when the folding device rotates from the folded state to the unfolded state, the first sliding member 24a, the first rotating member 21a, the first synchronous member 22a, the first supporting member 25a, the first connecting member 23a and the second sliding member 24b, the second rotating member 21b, the second synchronous member 22b, the second supporting member 25b and the second connecting member 23b can respectively move in the opposite direction of the above rotating process from the unfolded state to the folded state, which will not be described here.

[0102] Please refer to FIG. 3 and FIG. 8, in some embodiments, the folding device further comprises a hovering mechanism 300, which is used when the first rotating mechanism 200a and / or the second rotating mechanism 200b rotates a certain angle, at this time, if the external force is removed, the first rotating mechanism 200a and / or the second rotating mechanism 200b can remain stationary to achieve a static state.

[0103] Exemplarily, the hovering mechanism 300 comprises the first left cam 33a and the left connected cam 31. The first fixed synchronous shaft 202a can be fixedly connected with the base 100, the left connected cam 31 is arranged at one end of the first fixed synchronous shaft 202a, the first left cam 33a is fixedly arranged at one side of the first synchronous piece 22a close to the left connected cam 31, the opposite surfaces of the first left cam 33a and the left connected cam 31 can be matched with each other, and the left connected cam 31 is connected with the first left elastic piece 34a at the side away from the first left cam 33a, so that the left connected cam 31 and the first left cam 33a have a locking state and an unlocking state, and the first left elastic piece 34a can be a spring, a spring sheet or the like. In the locking state, the left connected cam 31 and the first left cam 33a are matched with each other to restrict the rotation of the first synchronous piece 22a around the first fixed synchronous shaft 202a; in the unlocking state, the left connected cam 31 and the first left cam 33a are matched with each other to restrict the rotation of the first synchronous piece 22a around the first fixed synchronous shaft 202a. Specifically, the opposite surfaces of the left connected cam 31 and the first left cam 33a are both provided with a plurality of protrusions and recesses matched with each other, the protrusions and the recesses are arranged in an array around the circumference of the first fixed synchronous shaft 202a, and when the protrusion of the left connected cam 31 is matched with the recess of the first left cam 33a or the recess of the left connected cam 31 is matched with the protrusion of the first left cam 33a, a damping force hindering the relative rotation of the first left cam 33a and the left connected cam 31 can be generated. Based on this, when the first synchronous piece 22a rotates around the base 100, the hovering mechanism 300 can provide a certain damping force for the first synchronous piece 22a, so as to realize the hovering of the first synchronous piece 22a at a set position, avoid the misoperation of the folding device, and in addition, the user can have a more obvious feeling during the unfolding or folding of the folding device, which is beneficial to improving the user experience.

[0104] Further, in order to improve the damping effect, the right connected cam 32 is slidably arranged at one end of the first fixed synchronous shaft 202a away from the left connected cam 31, the first right cam 35a is fixedly arranged at one side of the first synchronous piece 22a close to the right connected cam 32, and the opposite surfaces of the first right cam 35a and the right connected cam 32 can be matched with each other. In some embodiments, the first right connected cam 32 can be connected with the first right elastic piece (not shown in the figure), and the first left cam 33a, the first left elastic piece 34a, the left connected cam 31, the first right cam 35a, the first right elastic piece and the right connected cam 32 are symmetrically arranged.

[0105] Further, in order to simplify the structure of the hovering mechanism 300 and improve the damping effect, in the embodiment, the first fixed synchronous shaft 202a is arranged to be axially movable relative to the first synchronous part 22a. Specifically, the first stop part 12a is fixedly arranged on the base 100, the first synchronous part 22a is arranged with a first avoiding slot 225a on the side close to the base 100, and the opposite two side walls of the first avoiding slot 225a abut against the opposite two sides of the first stop part 12a respectively, so as to limit the length direction movement of the first synchronous part 22a relative to the base 100, and meanwhile avoid the interference of the first stop part 12a with the rotation of the first synchronous part 22a around the base 100. The first fixed synchronous shaft 202a can be axially movable relative to the first synchronous part 22a, that is, the first fixed synchronous shaft 202a is arranged to slide along the axial direction of itself on the base 100, and it needs to be understood that the first fixed synchronous shaft 202a cannot rotate or move in other directions relative to the base 100. The hovering mechanism 300 comprises a left connected cam 31, a right connected cam 32, a first left elastic part 34a, a first left cam 33a and a first right cam 35a, the left connected cam 31 and the right connected cam 32 are arranged at the two ends of the first fixed synchronous shaft 202a respectively, and the first left cam 33a and the first right cam 35a are arranged at the two ends of the first synchronous part 22a respectively. The opposite surfaces of the first left cam 33a and the left connected cam 31 are both arranged with a plurality of protrusions and recesses matched with each other, the opposite surfaces of the first right cam 35a and the right connected cam 32 are both arranged with a plurality of protrusions and recesses matched with each other, and the protrusions and recesses are arranged in an array around the circumferential direction of the first fixed synchronous shaft 202a. The two ends of the first left elastic part 34a are fixedly connected with the first fixed synchronous shaft 202a and the left connected cam 31 respectively, and the right connected cam 32 is fixedly or slidably connected with the first fixed synchronous shaft 202a.

[0106] When the first synchronous part 22a rotates around the base 100, that is, the first synchronous part 22a rotates around the first fixed synchronous shaft 202a, the first fixed synchronous shaft 202a can move along the axial direction of itself by extruding the first left elastic part 34a, so as to transmit the elastic force of the first left elastic part 34a to the first left connected cam 31 and the first right connected cam 32, and make the first left connected cam 31 and the first right connected cam 32 generate damping forces on the first left cam 33a and the first right cam 35a respectively, and the damping forces at the two ends are the same.

[0107] Similarly, the base 100 is fixedly provided with a second stopper 12b, and a second avoiding slot 225a is formed on one side of the second synchronizer 22b close to the base 100, and the opposite two side walls of the second avoiding slot 225a abut on the opposite two sides of the second stopper 12b respectively, so as to limit the lengthwise movement of the second synchronizer 22b relative to the base 100, and meanwhile, avoid the interference of the second stopper 12b with the rotation of the second synchronizer 22b around the base 100. The second fixed synchronizer shaft 202b can axially move relative to the second synchronizer 22b, that is, the second fixed synchronizer shaft 202b is slidably arranged on the base 100 along the axial direction of itself, and it should be understood that the second fixed synchronizer shaft 202b cannot rotate or move in other directions relative to the base 100. The hovering mechanism 300 further comprises a second left elastic member 34b, a second left cam 33b and a second right cam 35b, the left connected cam 31 and the right connected cam 32 are arranged at the two ends of the second fixed synchronizer shaft 202b respectively, and the second left cam 33b and the second right cam 35b are arranged at the two ends of the second synchronizer 22b respectively. The opposite surfaces of the second left cam 33b and the left connected cam 31 are respectively provided with a plurality of protrusions and recesses matched with each other, and the opposite surfaces of the second right cam 35b and the right connected cam 32 are respectively provided with a plurality of protrusions and recesses matched with each other, and the protrusions and recesses are arranged in the circumferential direction of the second fixed synchronizer shaft 202b. The two ends of the second left elastic member 34b are fixedly connected with the second fixed synchronizer shaft 202b and the left connected cam 31 respectively, and the right connected cam 32 is fixedly or slidably connected with the second fixed synchronizer shaft 202b.

[0108] In some embodiments, in addition to the above-mentioned structural members, the folding device can further comprise a synchronizing mechanism, which is used to make the other one of the first rotating mechanism 200a and the second rotating mechanism 200b make a synchronous and reverse movement through the synchronizing mechanism when one of them rotates relative to the base 100, so as to realize the synchronous folding and synchronous unfolding of the first rotating mechanism 200a and the second rotating mechanism 200b. The specific structure of the synchronizing mechanism will not be introduced here.

[0109] Please refer to FIG. 18 and FIG. 19, FIG. 18 is a front view of the electronic device in the folded state in some embodiments of the present application, and FIG. 19 is a front view of the electronic device in the unfolded state in the embodiment of FIG. 18.

[0110] The application further provides an electronic device, comprising a first shell 41a, a second shell 41b, a flexible display screen 500, and the folding device described above, wherein the first shell 41a is fixedly connected with the first sliding piece 24a, the second shell 41b is fixedly connected with the second sliding piece 24b, and the flexible display screen 500 continuously covers the first shell 41a, the base 100, and the second shell 41b. The flexible display screen 500 serves as the folding piece, and in the case that the folding device is further provided with the first support piece 25a and the second support piece 25b, the flexible display screen 500 is bonded with the first support piece 25a and the second support piece 25b.

[0111] The first shell 41a and the second shell 41b can serve as driving pieces, and when a user needs to fold the electronic device, the first shell 41a and the second shell 41b are flipped towards each other, driving the first sliding piece 24a and the second sliding piece 24b to move towards or away from the base 100, driving the first rotating piece 21a, the first connecting piece 23a, the first synchronous piece 22a, and the base 100 to change the parallelogram shape, while the second rotating piece 21b, the second connecting piece 23b, the second synchronous piece 22b, and the base 100 change the parallelogram shape, when the first rotating piece 21a, the first synchronous piece 22a, and the second rotating piece 21b, the second synchronous piece 22b rotate 90° to the folding state, the first sliding piece 24a and the second sliding piece 24b respectively drive the first shell 41a and the second shell 41b to slide along the sliding groove greater than 90° and support the one end of the flexible display screen 500 away from the base 100, while the first support piece 25a and the second support piece 25b are flipped towards the outside of the one end of the base 100, avoiding the flexible display screen 500, so that the flexible display screen 500 can be folded into a water drop shape.

[0112] The electronic device mentioned above includes but is not limited to mobile terminals such as mobile phones, tablet computers, notebook computers, palm computers, personal computers (PC), personal digital assistants (PDA), portable media players (PMP), navigation devices, wearable devices, smart bracelets, pedometers, and the like, and fixed terminals such as digital TVs and desktop computers. The present embodiment is illustratively described only when the electronic device is a mobile phone. Of course, in other embodiments, the electronic device can also be other kinds, and should also belong to the protection scope of the present application.

[0113] The terms "first", "second", "third", etc. in the embodiments of the present application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or components inherent to the process, method, product or device.

[0114] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a separate or alternative embodiment to the other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with each other.

[0115] The above only describes some embodiments of the present application, and does not limit the protection scope of the present application, and any equivalent device or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

[0116] Clause

[0117] Clause 1, a folding device, comprising a base, a first rotating mechanism and a second rotating mechanism, the first rotating mechanism and the second rotating mechanism are respectively rotatably connected to opposite sides of the base to make the folding device have a folded state and an unfolded state, the first rotating mechanism comprises a first rotating piece, a first synchronous piece, a first sliding piece and a first connecting piece, wherein,

[0118] One end of the first rotating piece is rotatably connected to the base around a first fixed rotating shaft, and the other end is rotatably connected to the first connecting piece around a first movable rotating shaft; one end of the first synchronous piece is rotatably connected to the base around a first fixed synchronous shaft, and the other end is rotatably connected to the first connecting piece around a first movable synchronous shaft;

[0119] The first fixed rotation axis, the first movable rotation axis, the first fixed synchronous axis and the first movable synchronous axis are parallel and non-coincident, the distance from the first fixed rotation axis to the first plane is different from the distance from the first fixed synchronous axis to the first plane, the first plane is a reference plane perpendicular to the thickness direction of the base and located at the bottom of the base;

[0120] The projection of the first fixed rotation axis and the first fixed synchronous axis on the second plane is connected by a straight line to form a first fixed side, the projection of the first movable rotation axis and the first movable synchronous axis on the second plane is connected by a straight line to form a first movable side, the second plane is a reference plane perpendicular to the first fixed rotation axis, the first fixed side and the first movable side are parallel to each other and have equal lengths, so that the first rotating member, the first synchronous member, the first connecting member and the base collectively form a parallelogram linkage mechanism.

[0121] The first sliding member is slidingly connected to the end of the first rotating member away from the base in the first direction, and the first sliding member is slidingly connected to the end of the first synchronous member away from the base in the third direction, the projection of the first direction and the third direction on the second plane is not parallel.

[0122] Clause 2, the folding device according to claim 1, wherein the distance from the first fixed rotation axis to the first plane is greater than the distance from the first fixed synchronous axis to the first plane, and the distance from the first fixed rotation axis to the third plane is less than the distance from the first fixed synchronous axis to the third plane, the third plane is a reference plane perpendicular to the width direction of the base and located in the middle of the base.

[0123] Clause 3, the folding device according to claim 2, wherein the first connecting member comprises a first rotating pin hole and a first synchronous pin hole, the axes of the first rotating pin hole and the first synchronous pin hole coincide with the first movable rotation axis and the first movable synchronous axis respectively, the end of the first rotating member close to the first synchronous member is provided with a first rotating fitting hole, the first rotating fitting hole and the first rotating pin hole are connected by a first rotating pin, and the end of the first synchronous member close to the first rotating member is provided with a first synchronous fitting hole, the first synchronous fitting hole and the first synchronous pin hole are connected by a first synchronous pin.

[0124] Clause 4, the folding device according to any one of claims 1-3, wherein the second rotating mechanism comprises a second rotating member, a second synchronous member, a second sliding member and a second connecting member, wherein,

[0125] The second rotating member is rotatably connected to the base at one end by a second fixed rotating shaft and rotatably connected to the second connecting member at the other end by a second movable rotating shaft; and the second synchronizing member is rotatably connected to the base at one end by a second fixed synchronizing shaft and rotatably connected to the second connecting member at the other end by a second movable synchronizing shaft.

[0126] The second fixed rotating shaft, the second movable rotating shaft, the second fixed synchronizing shaft and the second movable synchronizing shaft are parallel and non-coincident, and the distance from the second fixed rotating shaft to the first plane is different from the distance from the second fixed synchronizing shaft to the first plane.

[0127] The projection of the second fixed rotating shaft and the second fixed synchronizing shaft on the second plane is connected by a straight line to form a second fixed side, and the projection of the second movable rotating shaft and the second movable synchronizing shaft on the second plane is connected by a straight line to form a second movable side, and the second fixed side and the second movable side are parallel to each other and have equal lengths, so that the second rotating member, the second synchronizing member, the second connecting member and the base form a parallelogram linkage mechanism.

[0128] The second sliding member is slidably connected to the end of the second rotating member away from the base in a second direction, and the second sliding member is slidably connected to the end of the second synchronizing member away from the base in a fourth direction, and the projection of the second direction and the fourth direction on the second plane is not parallel.

[0129] Clause 5, the folding device according to claim 4, wherein the distance from the second fixed rotating shaft to the first plane is greater than the distance from the second fixed synchronizing shaft to the first plane, and the distance from the second fixed rotating shaft to the third plane is less than the distance from the second fixed synchronizing shaft to the third plane.

[0130] Clause 6, the folding device according to any one of claims 1-3, wherein the first rotating mechanism further comprises a first support member rotatably connected to the first sliding member and slidably and rotatably connected to at least one of the first rotating member and the first synchronizing member.

[0131] When the first rotating mechanism and the second rotating mechanism rotate towards each other to the folded state, the distance from the end of the first support member away from the base to the second rotating mechanism is less than the distance from the end of the first support member close to the base to the second rotating mechanism.

[0132] Clause 7, the folding device according to claim 6, wherein the first support member and the first synchronizing member are connected by a first limiting part and a first sliding part, the first limiting part is provided on one of the first support member and the first synchronizing member, and the first sliding part is provided on the other one of the first support member and the first synchronizing member.

[0133] Clause 8. The folding device according to claim 7, wherein the first sliding portion includes an inner sliding surface and an outer sliding surface, and the first limiting portion includes an inner limiting block and an outer limiting block that respectively cooperate with the inner sliding surface and the outer sliding surface.

[0134] When the first rotating mechanism and the second rotating mechanism rotate towards each other to the folded state, the inner limiting block and the inner sliding surface guide and limit the first support member, so that the distance from the end of the first support member away from the base to the second rotating mechanism is less than the distance from the end of the first support member close to the base to the second rotating mechanism.

[0135] When the first rotating mechanism and the second rotating mechanism rotate in opposite directions to the unfolded state, the outer limiting block and the outer sliding surface guide and limit the first support member so that the first support member is parallel to the second plane.

[0136] Clause 9. The folding device according to claim 8, wherein both the inner limiting block and the outer limiting block are plate-shaped;

[0137] The inner limiting block and the outer limiting block are spaced apart along the movement direction of the first support member relative to the first synchronizing member.

[0138] Clause 10. The folding device according to claim 7, wherein the first support member and the first rotating member are connected by a first guide portion and a first rolling portion, the first guide portion being disposed on one of the first support member and the first rotating member, and the first rolling portion being disposed on the other of the first support member and the first rotating member.

[0139] Clause 11. The folding device according to claim 6, wherein the first sliding member is provided with a first sliding groove along a first direction, the first rotating member is provided with a first slider, the first slider can slide along the first sliding groove, and the first slider and the first sliding groove are in clearance fit.

[0140] The first sliding member has a third sliding groove along a third direction, and the first synchronizing member has a third slider. The third slider can slide along the third sliding groove, and the third slider and the third sliding groove are in clearance fit.

[0141] Clause 12. The folding device according to claim 6, wherein the third slide is a straight slide, and when the folding device is in the unfolded state, the distance from the end of the third slide near the base to the bottom of the base is less than the distance from the end of the third slide away from the base to the bottom of the base.

[0142] Clause 13, the folding device of claim 11, wherein the first sliding groove is a straight sliding groove, and when the folding device is in the unfolded state, a distance from one end of the first sliding groove close to the base to the bottom of the base is less than a distance from another end of the first sliding groove away from the base to the bottom of the base.

[0143] Clause 14, the folding device of claim 11, wherein the first sliding groove is an arc-shaped sliding groove.

[0144] Clause 15, the folding device of claim 14, wherein when the folding device is in the unfolded state, an axis of the arc-shaped sliding groove is located on a side of the arc-shaped sliding groove away from the base.

[0145] Clause 16, the folding device of any one of claims 1-3, wherein one end of the first fixed synchronous shaft is slidingly provided with a left-attached cam, a side of the first synchronous member close to the left-attached cam is provided with a first left cam, opposite surfaces of the left-attached cam and the first left cam can cooperate with each other, and the left-attached cam is connected with a first left elastic member so that the left-attached cam and the first left cam have a locked state and an unlocked state.

[0146] In the locked state, the left-attached cam and the first left cam cooperate with each other to limit rotation of the first synchronous member around the first fixed synchronous shaft; and in the unlocked state, the left-attached cam and the first left cam are disengaged to allow the first synchronous member to rotate around the first fixed synchronous shaft.

[0147] Clause 17, the folding device of claim 16, wherein an end of the first fixed synchronous shaft away from the left-attached cam is provided with a right-attached cam, and a side of the first synchronous member close to the right-attached cam is provided with a first right cam, opposite surfaces of the right-attached cam and the first right cam can cooperate with each other.

[0148] Clause 18, the folding device of claim 17, wherein a first stopper is fixedly arranged on the base, the first stopper is used to limit movement of the first synchronous member relative to a length direction of the base, the first fixed synchronous shaft can move axially relative to the first synchronous member, two ends of the first left elastic member are respectively fixedly connected with the first fixed synchronous shaft and the left-attached cam, and the right-attached cam is fixedly or slidingly connected with the first fixed synchronous shaft.

[0149] Clause 19, a folding device, comprising a base, a first rotating mechanism and a second rotating mechanism, the first rotating mechanism and the second rotating mechanism are respectively rotatably connected to opposite sides of the base to make the folding device have a folded state and an unfolded state, the first rotating mechanism comprises a first rotating member, a first synchronous member and a first connecting member, wherein,

[0150] one end of the first rotating member is rotatably connected to the base around a first fixed rotating shaft, and the other end is rotatably connected to the first connecting member around a first movable rotating shaft; one end of the first synchronous member is rotatably connected to the base around a first fixed synchronous shaft, and the other end is rotatably connected to the first connecting member around a first movable synchronous shaft;

[0151] the first fixed rotating shaft, the first movable rotating shaft, the first fixed synchronous shaft and the first movable synchronous shaft are parallel and do not coincide, the distance from the first fixed rotating shaft to a first plane is different from the distance from the first fixed synchronous shaft to the first plane, the first plane is a reference plane perpendicular to the thickness direction of the base and located at the bottom of the base;

[0152] the projection of the first fixed rotating shaft and the first fixed synchronous shaft on a second plane is connected by a straight line to form a first fixed edge, the projection of the first movable rotating shaft and the first movable synchronous shaft on the second plane is connected by a straight line to form a first movable edge, the second plane is a reference plane perpendicular to the first fixed rotating shaft, the first fixed edge and the first movable edge are parallel to each other and have equal length, so that the first rotating member, the first synchronous member, the first connecting member and the base form a parallelogram linkage mechanism.

[0153] Clause 20, an electronic device, comprising a first housing, a second housing, a flexible display screen and a folding device according to any one of claims 1-19, wherein:

[0154] the first housing is connected with the first rotating mechanism, the second housing is connected with the second rotating mechanism, and the flexible display screen continuously covers the first housing, the base and the second housing.

Claims

1. A folding device comprising a base, a first rotating mechanism and a second rotating mechanism, the first rotating mechanism and the second rotating mechanism are respectively rotatably connected to opposite sides of the base to make the folding device have a folded state and an unfolded state, the first rotating mechanism comprises a first rotating member, a first synchronizing member, a first sliding member and a first connecting member, wherein, one end of the first rotating member is rotatably connected to the base around a first fixed rotating shaft, and the other end is rotatably connected to the first connecting member around a first movable rotating shaft; one end of the first synchronizing member is rotatably connected to the base around a first fixed synchronizing shaft, and the other end is rotatably connected to the first connecting member around a first movable synchronizing shaft; the first fixed rotating shaft, the first movable rotating shaft, the first fixed synchronizing shaft and the first movable synchronizing shaft are parallel and do not coincide, the distance from the first fixed rotating shaft to a first plane is different from the distance from the first fixed synchronizing shaft to the first plane, the first plane is a reference plane perpendicular to the thickness direction of the base and located at the bottom of the base; the projection of the first fixed rotating shaft and the first fixed synchronizing shaft on a second plane is connected by a straight line to form a first fixed edge, the projection of the first movable rotating shaft and the first movable synchronizing shaft on the second plane is connected by a straight line to form a first movable edge, the second plane is a reference plane perpendicular to the first fixed rotating shaft, the first fixed edge and the first movable edge are parallel to each other and have equal lengths, so that the first rotating member, the first synchronizing member, the first connecting member and the base form a parallelogram linkage mechanism; the first sliding member is slidably connected to the end of the first rotating member away from the base in a first direction, and the first sliding member is slidably connected to the end of the first synchronizing member away from the base in a third direction, the projection of the first direction and the third direction on the second plane is not parallel.

2. The folding device of claim 1, wherein, the distance from the first fixed rotating shaft to the first plane is greater than the distance from the first fixed synchronizing shaft to the first plane, the distance from the first fixed rotating shaft to a third plane is less than the distance from the first fixed synchronizing shaft to the third plane, the third plane is a reference plane perpendicular to the width direction of the base and located in the middle of the base.

3. The folding device of claim 2, wherein, the first connecting member comprises a first rotating pin hole and a first synchronizing pin hole, the axes of the first rotating pin hole and the first synchronizing pin hole coincide with the first movable rotating shaft and the first movable synchronizing shaft respectively, the end of the first rotating member close to the first synchronizing member is provided with a first rotating fitting hole, the first rotating fitting hole and the first rotating pin hole are connected by a first rotating pin; the end of the first synchronizing member close to the first rotating member is provided with a first synchronizing fitting hole, the first synchronizing fitting hole and the first synchronizing pin hole are connected by a first synchronizing pin.

4. The folding device according to any one of claims 1-3, wherein, the second rotating mechanism comprises a second rotating member, a second synchronizing member, a second sliding member and a second connecting member, wherein, One end of the second rotating member is rotationally connected to the base around a second fixed rotating shaft, and the other end is rotationally connected to the second connecting member around a second movable rotating shaft; one end of the second synchronous member is rotationally connected to the base around a second fixed synchronous shaft, and the other end is rotationally connected to the second connecting member around a second movable synchronous shaft; The second fixed rotating shaft, the second movable rotating shaft, the second fixed synchronous shaft, and the second movable synchronous shaft are parallel and do not coincide, and the distance from the second fixed rotating shaft to the first plane is different from the distance from the second fixed synchronous shaft to the first plane; The projection of the second fixed rotating shaft and the second fixed synchronous shaft on the second plane is connected by a straight line to form a second fixed edge, and the projection of the second movable rotating shaft and the second movable synchronous shaft on the second plane is connected by a straight line to form a second movable edge, and the second fixed edge and the second movable edge are parallel to each other and have equal lengths, so that the second rotating member, the second synchronous member, the second connecting member, and the base form a parallelogram linkage mechanism; The second sliding member is slidingly connected to the end of the second rotating member away from the base in a second direction, and the second sliding member is slidingly connected to the end of the second synchronous member away from the base in a fourth direction, and the projection of the second direction and the fourth direction on the second plane is not parallel.

5. The folding device of claim 4, wherein, The distance from the second fixed rotating shaft to the first plane is greater than the distance from the second fixed synchronous shaft to the first plane, and the distance from the second fixed rotating shaft to the third plane is less than the distance from the second fixed synchronous shaft to the third plane.

6. The folding device according to any one of claims 1-3, wherein, The first rotating mechanism further comprises a first support member rotationally connected to the first sliding member and slidingly and rotationally connected to at least one of the first rotating member and the first synchronous member; When the first rotating mechanism and the second rotating mechanism rotate towards each other to the folded state, the distance from the end of the first support member away from the base to the second rotating mechanism is less than the distance from the end of the first support member close to the base to the second rotating mechanism.

7. The folding device of claim 6, wherein, The first support member and the first synchronous member are connected by the cooperation of a first limiting part and a first sliding part, the first limiting part is arranged on one of the first support member and the first synchronous member, and the first sliding part is arranged on the other one of the first support member and the first synchronous member.

8. The folding device of claim 7, wherein, The first sliding part comprises an inner sliding surface and an outer sliding surface, and the first limiting part comprises an inner limiting block and an outer limiting block matched with the inner sliding surface and the outer sliding surface, respectively, When the first rotating mechanism and the second rotating mechanism rotate towards each other to the folded state, the inner limiting block and the inner sliding surface guide and limit the first support member, so that the distance from the end of the first support member away from the base to the second rotating mechanism is less than the distance from the end of the first support member close to the base to the second rotating mechanism; When the first rotating mechanism and the second rotating mechanism are rotated away from each other to the unfolded state, the outer limiting block and the outer sliding surface guide and limit the first support relative to the second plane to make the first support parallel to the second plane.

9. The folding device of claim 8, wherein, The inner limiting block and the outer limiting block are both plate-shaped. The inner limiting block and the outer limiting block are arranged in a spaced manner along the movement direction of the first support relative to the first synchronizer.

10. The folding apparatus of claim 7, wherein, The first support and the first rotating member are connected through a first guide part and a first rolling part, the first guide part is arranged on one of the first support and the first rotating member, and the first rolling part is arranged on the other one of the first support and the first rotating member.

11. The folding apparatus of claim 6, wherein, The first sliding member is provided with a first sliding groove in a first direction, the first rotating member is provided with a first sliding block, the first sliding block can slide along the first sliding groove, and the first sliding block and the first sliding groove are in clearance fit. The first sliding member is provided with a third sliding groove in a third direction, the first synchronizer is provided with a third sliding block, the third sliding block can slide along the third sliding groove, and the third sliding block and the third sliding groove are in clearance fit.

12. The folding apparatus of claim 6, wherein, The third sliding groove is a linear sliding groove, when the folding device is in the unfolded state, the distance from one end of the third sliding groove close to the base to the bottom of the base is less than the distance from the other end of the third sliding groove away from the base to the bottom of the base.

13. The folding apparatus of claim 11, wherein, The first sliding groove is a linear sliding groove, when the folding device is in the unfolded state, the distance from one end of the first sliding groove close to the base to the bottom of the base is less than the distance from the other end of the first sliding groove away from the base to the bottom of the base.

14. The folding apparatus of claim 11, wherein, The first sliding groove is an arc-shaped sliding groove.

15. The folding device of claim 14, wherein, When the folding device is in the unfolded state, the axis of the arc-shaped sliding groove is located on the side of the arc-shaped sliding groove away from the base.

16. The folding apparatus of any one of claims 1-3, wherein, One end of the first fixed synchronizer shaft is slidingly provided with a left connected cam, the first synchronizer is provided with a first left cam on the side close to the left connected cam, the opposite surfaces of the first left cam and the left connected cam can be matched with each other, and the left connected cam is connected with a first left elastic member, so that the left connected cam and the first left cam have a locking state and an unlocking state. In the locking state, the left connected cam and the first left cam are matched with each other to limit the rotation of the first synchronizer around the first fixed synchronizer shaft; in the unlocking state, the left connected cam and the first left cam are matched with each other to limit the rotation of the first synchronizer around the first fixed synchronizer shaft.

17. The folding apparatus of claim 16, wherein, The end of the first fixed synchronizer shaft away from the left connected cam is provided with a right connected cam, and the first synchronizer is provided with a first right cam on the side close to the right connected cam. The opposite surfaces of the first right cam and the right connected cam can be matched with each other.

18. The folding apparatus of claim 17, wherein, The first stopper is fixed on the base and is used to limit the lengthwise movement of the first synchronous member relative to the base. The first fixed synchronous shaft can move axially relative to the first synchronous member. The two ends of the first left elastic member are fixedly connected to the first fixed synchronous shaft and the left connected cam respectively. The right connected cam is fixedly or slidingly connected to the first fixed synchronous shaft.

19. A folding device comprising a base, a first rotating mechanism and a second rotating mechanism, the first rotating mechanism and the second rotating mechanism being respectively rotatably connected to opposite sides of the base to make the folding device have a folded state and an unfolded state, the first rotating mechanism comprising a first rotating member, a first synchronous member and a first connecting member, wherein, one end of the first rotating member is rotatably connected to the base about a first fixed rotating shaft, and the other end is rotatably connected to the first connecting member about a first movable rotating shaft; one end of the first synchronous member is rotatably connected to the base about a first fixed synchronous shaft, and the other end is rotatably connected to the first connecting member about a first movable synchronous shaft; the first fixed rotating shaft, the first movable rotating shaft, the first fixed synchronous shaft and the first movable synchronous shaft are parallel and do not coincide, the distance from the first fixed rotating shaft to a first plane is different from the distance from the first fixed synchronous shaft to the first plane, the first plane being a reference plane perpendicular to the thickness direction of the base and located at the bottom of the base; the projection of the first fixed rotating shaft and the first fixed synchronous shaft on a second plane is connected by a straight line to form a first fixed edge, the projection of the first movable rotating shaft and the first movable synchronous shaft on the second plane is connected by a straight line to form a first movable edge, the second plane being a reference plane perpendicular to the first fixed rotating shaft, the first fixed edge and the first movable edge being parallel to each other and having equal lengths, so that the first rotating member, the first synchronous member, the first connecting member and the base form a parallelogram linkage mechanism.

20. An electronic device, comprising: The folding device comprises a first shell, a second shell, a flexible display screen and a folding device according to any one of claims 1-19, wherein: the first shell is connected to the first rotating mechanism, the second shell is connected to the second rotating mechanism, and the flexible display screen continuously covers the first shell, the base and the second shell.

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