Folding apparatus and electronic device

Abstract

The present application relates to the technical field of folding structures, and provides a folding apparatus and an electronic device. The folding apparatus comprises a base, a first rotating mechanism, and a second rotating mechanism. By means of a first rotating member, a first synchronizing member, and a first sliding member, the first rotating mechanism, together with the base, forms a moving mechanism having a unique movement trajectory. The first sliding member is slidably connected to one of the first rotating member and the first synchronizing member, and is slidably and rotatably connected to the other of the first rotating member and the first synchronizing member. In the folding apparatus provided in embodiments of the present application, the first sliding member is slidably and rotatably connected to one of the first synchronizing member and the first rotating member, so that friction during movement can be reduced, thereby improving the movement smoothness of the first rotating mechanism.

Description

Folding device and electronic device

[0001] The present application claims priority to the Chinese patent application No. 2024110128397, filed on July 25, 2024, and titled "Folding device and electronic device", 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 types of 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 favored by more and more 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 member, a first synchronous member and a first sliding member. The first rotating member is rotatably connected to the base about a first fixed rotating shaft. The first synchronous member is rotatably connected to the base about a first fixed synchronous shaft. The first fixed synchronous shaft and the first fixed rotating shaft are parallel to each other and do not coincide. The first sliding member is slidably and rotatably connected to one end of the first rotating member away from the base along a first direction. The first sliding member is slidably connected to one end of the first synchronous member away from the base along a third direction. The projection of the first direction and the third direction on a first plane is not parallel. The first plane is a reference plane perpendicular to the first fixed rotating shaft.

[0005] On the other hand, embodiments of this application provide a folding device, including a base, a first rotating mechanism, and a second rotating mechanism. The first rotating mechanism and the second rotating mechanism are rotatably connected to opposite sides of the base to enable the folding device to have a folded state and an unfolded state. The first rotating mechanism includes a first rotating member, a first synchronizing member, and a first sliding member. The first rotating member is rotatably connected to the base about a first fixed rotating axis. The first synchronizing member is rotatably connected to the base about a first fixed synchronizing axis. The first fixed synchronizing axis and the first fixed rotating axis are parallel to each other and do not coincide. The first sliding member is rolled along a first direction to the end of the first rotating member away from the base. The first sliding member is also slidably connected along a third direction to the end of the first synchronizing member away from the base. The projections of the first direction and the third direction onto a first plane are not parallel. The first plane is a reference plane perpendicular to the first fixed rotating axis.

[0006] In another aspect, embodiments of this application provide a folding device, including a base, a first rotating mechanism, and a second rotating mechanism. The first rotating mechanism and the second rotating mechanism are rotatably connected to opposite sides of the base to enable the folding device to have a folded state and an unfolded state. The first rotating mechanism includes a first rotating member, a first synchronizing member, and a first sliding member. The first rotating member is rotatably connected to the base about a first fixed rotating axis. The first synchronizing member is rotatably connected to the base about a first fixed synchronizing axis. The first fixed synchronizing axis and the first fixed rotating axis are parallel to each other and do not coincide. The first sliding member is slidably connected to the end of the first rotating member away from the base along a first direction. The first sliding member slides along a third direction and is rotatably connected to the end of the first synchronizing member away from the base. The projections of the first direction and the third direction onto a first plane are not parallel. The first plane is a reference plane perpendicular to the first fixed rotating axis.

[0007] In another aspect, embodiments of this application provide an electronic device, including a first housing, a second housing, a flexible display screen, and the aforementioned folding device. The first housing is fixedly connected to the first sliding member. The second housing is connected to the second rotating mechanism. The flexible display screen continuously covers the first housing, the base, and the second housing. [Attached Image Description]

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 is a sectional view of an electronic device according to some embodiments of the present application;

[0010] Figure 2 is a schematic view of the overall structure of a first rotating mechanism according to some embodiments of the present application;

[0011] Figure 3 is a schematic view of the movement of the first rotating mechanism according to some embodiments of the present application;

[0012] Figure 4 is a schematic view of the structure of the first rotating mechanism according to some embodiments of the present application in an unfolded state;

[0013] Figure 5 is a schematic view of the structure of the first rotating mechanism according to some embodiments of the present application in a folded state;

[0014] Figure 6 is a schematic view of the partial exploded structure of a first rotating mechanism according to another embodiment of the present application;

[0015] Figure 7 is a sectional view of the folding device according to some embodiments of the present application at a section;

[0016] Figure 8 is a sectional view of the folding device according to some embodiments of the present application at another section;

[0017] Figure 9 is a schematic view of the movement of a first rotating mechanism according to another embodiment of the present application;

[0018] Figure 10 is a schematic view of the overall exploded structure of a first rotating mechanism according to some embodiments of the present application;

[0019] Figure 11 is a schematic view of the partial exploded structure of a first rotating mechanism according to some embodiments of the present application;

[0020] Figure 12 is a schematic view of the structure of a first rotating mechanism according to another embodiment of the present application in an unfolded state;

[0021] Figure 13 is a schematic view of the structure of a first rotating mechanism according to another embodiment of the present application in a folded state;

[0022] Figure 14 is a schematic view of the partial exploded structure of a first rotating mechanism according to another embodiment of the present application;

[0023] Figure 15 is a schematic view of the partial exploded structure of a first rotating mechanism according to yet another embodiment of the present application;

[0024] Figure 16 is a schematic view of the structure of a first connecting member according to some embodiments of the present application;

[0025] Figure 17 is a schematic view of the overall exploded structure of a first rotating mechanism according to some embodiments of the present application from another perspective.

DETAILED DESCRIPTION

[0026] The application will be described in further detail below with reference to the drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustration of the application, but 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.

[0027] Referring to FIG. 1, FIG. 1 is a cross-sectional view of an electronic device in some embodiments of the application. The application provides an electronic device, which includes a first housing 41a, a second housing 41b, a folding device, and a flexible display screen 500. The first housing 41a and the second housing 41b are rotationally connected by the folding device, and the flexible display screen 500 can continuously cover the surfaces of the first housing 41a and the second housing 41b. When the first housing 41a and the second housing 41b are folded or unfolded along with the folding device, the flexible display screen 500 can be bent or flattened along with the first housing 41a and the second housing 41b.

[0028] 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 (PCs), personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, and the like, as well as 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 of other types, and should also be within the scope of protection of the application.

[0029] In addition, the folding device mentioned above is a folding device capable of relative rotation to achieve folding and unfolding. The folding device provided in the present 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 present embodiment is illustratively described only when the folding device is applied to a foldable electronic device in the field of electronic products.

[0030] In some embodiments, the folding device 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 rotationally connected to opposite sides of the base 100 to make the folding device have a folding state and an unfolding state.

[0031] It can be understood that in the embodiment, the first rotating mechanism 200a and the second rotating mechanism 200b can be symmetrically or asymmetrically arranged relative to the base 100. For ease 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 illustrated by taking the specific arrangement mode 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.

[0032] The base 100 is a basic structural member in the folding device, mainly serving as a support and a mounting, so that other structural members in the folding device can be mounted on the base 100. In some embodiments, the base 100 can also serve as a support for the flexible display screen 500. The embodiment does not limit the shape, structure, material and other parameters of the base 100, as long as it can provide a mounting basis for other structural members. The flexible display screen 500 includes but is not limited to various flexible members, or various rigid members, or other components.

[0033] It is worth mentioning that in some scenarios, the first rotating mechanism 200a and the second rotating mechanism 200b can be provided with a plurality of first rotating mechanisms 200a and a plurality of second rotating mechanisms 200b, respectively, and the plurality of first rotating mechanisms 200a and the plurality of second rotating mechanisms 200b can all take one base 100 as a bearing component, so as 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 second rotating mechanism 200b takes a corresponding base 100 as a bearing component.

[0034] Please refer to FIG. 2 and FIG. 3, FIG. 2 is a schematic diagram of the overall structure of the first rotating mechanism in the embodiment of FIG. 1, and FIG. 3 is a motion diagram of the first rotating mechanism in the embodiment of FIG. 1. The first rotating mechanism 200a includes a first rotating member 21a, a first synchronous member 22a and a first sliding member 24a, wherein the first rotating member 21a is rotationally connected to the base 100 about a first fixed rotating shaft 201a; the first synchronous member 22a is rotationally connected to the base 100 about a first fixed synchronous shaft 202a. The first fixed synchronous shaft 202a and the first fixed rotating shaft 201a are parallel to each other and do not coincide.

[0035] Please refer to Fig. 4 and Fig. 5, Fig. 4 is a structural diagram of the first rotating mechanism in the unfolded state of the embodiment of Fig. 1, and Fig. 5 is a structural diagram of the first rotating mechanism in the folded state of the embodiment of Fig. 4. The first sliding member 24a is slidably and rotatably (rollably) connected to one end of the first rotating member 21a away from the base 100 in the first direction A1, and is slidably connected to one end of the first synchronizing member 22a away from the base 100 in the third direction A2. The first direction A1 and the third direction A2 are not parallel in the projection of the first plane C1 (not shown in the figure), and the first plane C1 is a reference plane perpendicular to the first fixed rotating axis 201a.

[0036] It should be noted that the above-mentioned rotation can be understood as the circumferential motion of the two moving members around the rotating axis, and the sliding can be understood as the parallel motion of the two moving members. Among them, when the motion trajectory is a circular path but the contact mode between the components is sliding contact (such as the sliding block translating in the arc-shaped slot), this motion mode can be called both rotation and sliding. The sliding and rotating connection of the two moving members means that there is a change in displacement and a change in angle of the two moving members, and the contact point of the two moving members can change. The sliding and rotating connection of the two moving members can also be called rolling connection.

[0037] During the sliding of the first sliding member 24a relative to the first rotating member 21a, the first sliding member 24a can also rotate relative to the first rotating member 21a, i.e., the first sliding member 24a rolls relative to the first rotating member 21a. The first sliding member 24a and the first rotating member 21a transmit force through point / line contact, and the friction between them is small, which improves the smoothness of the movement of the first sliding member 24a relative to the first rotating member 21a and the first synchronizing member 22a. In the folded state, since the first direction A1 and the third direction A2 are not parallel, the first rotating member 21a and the first synchronizing member 22a restrict each other. Even if the electronic device using the folding device falls in the folded state, the risk of instantaneous large displacement of the first sliding member 24a relative to the first rotating member 21a or the first synchronizing member 22a in this state can be effectively reduced, thereby ensuring the reliability of the overall structure of the electronic device.

[0038] The first synchronizing member 22a is movably connected to the first rotating member 21a. The first synchronizing member 22a and the first rotating member 21a can be directly connected or movably connected through the addition of other structural members. It should be noted that when two structural members form a kinematic chain through movable connection (such as low pairs such as rotating pairs and moving pairs, or high pairs such as spherical hinges), the connection at least restricts one relative degree of freedom between the two (i.e., provides at least one constraint), while at least one unconstrained degree of freedom is retained to achieve relative motion.

[0039] The first rotating piece 21a and the first synchronous piece 22a are connected through the first rotating piece 21a and the first synchronous piece 22a, the combination degree between the first rotating piece 21a and the first synchronous piece 22a is improved, and the first rotating piece 21a and the first synchronous piece 22a are beneficially driven synchronously. The folding device can not only be folded, but also can move according to a preset folding track, and a required folding mode is obtained.

[0040] When the folding device is in a moving process, the base 100, the first rotating piece 21a, the first synchronous piece 22a and the first sliding piece 24a jointly form a moving mechanism, the first sliding piece 24a is slidingly and rotatably connected to the first rotating piece 21a, that is, the first sliding piece 24a is rollingly connected to the first rotating piece 21a, and a plane high pair cooperation with a freedom degree of 2 is formed between the first sliding piece 24a and the first rotating piece 21a. The base 100, the first rotating piece 21a, the base 100 and the first synchronous piece 22a, and the first sliding piece 24a and the first synchronous piece 22a form plane low pair cooperation respectively with a freedom degree of 1. Taking the base 100 as a fixed component, the moving mechanism has three moving components in total, three plane low pair cooperations with a freedom degree of 1, and one plane high pair cooperation with a freedom degree of 2. According to a freedom degree calculation formula, when the activity connection between the first rotating piece 21a and the first synchronous piece 22a is not considered, the freedom degree of the moving mechanism is F=3n-2PL-Ph=3x3-2x3-1=2.

[0041] Wherein, n is the number of moving components, PL is the number of low pair constraints, and Ph is the number of high pair constraints.

[0042] Further, since the activity connection between the first rotating piece 21a and the first synchronous piece 22a can at least limit one relative freedom degree between the two, the maximum movement freedom degree of the moving mechanism is 1. That is, the moving mechanism can realize the uniqueness and reliability of the movement track of each moving component.

[0043] Please refer to FIG. 6, which is a partial exploded schematic view of the first rotating mechanism in another embodiment. The activity connection between the first rotating piece 21a and the first synchronous piece 22a will be specifically described below. In some embodiments, the first rotating piece 21a and the first synchronous piece 22a are provided with a first rolling groove 216a and a first rolling column 226a, the first rolling groove 216a is arranged on one of the first rotating piece 21a and the first synchronous piece 22a, and the first rolling column 226a is arranged on the other one of the first rotating piece 21a and the first synchronous piece 22a. The embodiments of the present application are only described by taking the first rolling column 226a arranged on the first synchronous piece 22a and the first rolling groove 216a arranged on the first rotating piece 21a as examples, the first rolling column 226a is integrally arranged on the first synchronous piece 22a, and the first rolling column 226a can be inserted into the first rolling groove 216a and roll in the first rolling groove 216a.

[0044] The first rolling groove 216 can be a straight sliding groove or an arc sliding groove. The specific shape of the first rolling groove 216 can be selected according to actual needs to adapt to the movement track of each component when the first rotating member 21a, the first synchronous member 22a and the first sliding member 24a are linked, so that the movement track of each component is unique.

[0045] In the embodiment, the first sliding member 24a is slidingly and rotatably connected to the first rotating member 21a, that is, the first sliding member 24a is rollingly connected to the first rotating member 21a, and a plane high pair cooperation with a degree of freedom of 2 is formed between the first sliding member 24a and the first rotating member 21a. Meanwhile, the first rotating member 21a and the first synchronous member 22a are connected through the first rolling groove 216a and the first rolling column 226a to form a plane high pair cooperation with a degree of freedom of 2. When the folding device is in a movement process, the base 100, the first rotating member 21a, the first synchronous member 22a and the first sliding member 24a jointly constitute a moving mechanism, wherein the base 100 and the first rotating member 21a, the base 100 and the first synchronous member 22a, and the first sliding member 24a and the first synchronous member 22a are respectively connected to form a plane low pair cooperation with a degree of freedom of 1. Taking the base 100 as a fixed component, the moving mechanism has a total of 3 moving components, a total of 3 plane low pair cooperations with a degree of freedom of 1, and 2 plane high pair cooperations with a degree of freedom of 2. According to the degree of freedom calculation formula, the degree of freedom of the moving mechanism is: F=3n-2PL-Ph=3×3-2×3-2=1

[0046] Since the degree of freedom of the moving mechanism is 1, the moving mechanism can realize the uniqueness and reliability of the movement track of each movable component.

[0047] Please refer to FIG. 2 and FIG. 3. In some embodiments, the first rotating member 21a and the first synchronous member 22a can also be connected in other ways. Exemplarily, the first rotating mechanism 200a includes the first rotating member 21a, the first synchronous member 22a, the first sliding member 24a and the first connecting member 23a, wherein one end of the first rotating member 21a is rotatably connected to the base 100 around the first fixed rotating shaft 201a, and the other end is rotatably connected to the first connecting member 23a around the first active rotating shaft 203a; one end of the first synchronous member 22a is rotatably connected to the base 100 around the first fixed synchronous shaft 202a, and the other end is rotatably connected to the first connecting member 23a around the first active synchronous shaft 204a. The first fixed rotating shaft 201a, the first active rotating shaft 203a, the first fixed synchronous shaft 202a and the first active synchronous shaft 204a are parallel and do not coincide.

[0048] The embodiment does not limit the shape, structure, material and other parameters of the first rotating member 21a, the first synchronous member 22a, the first sliding member 24a and the first connecting member 23a. As long as one end of the first rotating member 21a is rotatably connected with the base 100, the other end is rotatably connected with the first connecting member 23a, the end of the first rotating member 21a away from the base 100 is slidably and rotatably connected with the first sliding member 24a, and the end of the first synchronous member 22a away from the base 100 is slidably connected with the first sliding member 24a, the requirements are met.

[0049] The first rotating member 21a and the first synchronous member 22a rotate relative to the base 100. The first rotating member 21a forms a low pair cooperation with the base 100, and the first synchronous member 22a forms a plane low pair cooperation with the base 100, which has one degree of freedom. The specific connection structure of the first rotating member 21a and the first synchronous member 22a with the base 100 will be described in detail later.

[0050] In the embodiment, the first sliding member 24a is slidably and rotatably connected with the first rotating member 21a, that is, the first sliding member 24a is rollingly connected with the first rotating member 21a, and a plane high pair cooperation with two degrees of freedom is formed between them. When the folding device is in motion, the base 100, the first rotating member 21a, the first synchronous member 22a, the first sliding member 24a and the first connecting member 23a jointly form a movable mechanism. Among them, the base 100 and the first rotating member 21a, the base 100 and the first synchronous member 22a, the first sliding member 24a and the first synchronous member 22a, the first connecting member 23a and the first rotating member 21a, and the first connecting member 23a and the first synchronous member 22a form a plane low pair cooperation with one degree of freedom, respectively. Taking the base 100 as a fixed component, the movable mechanism has a total of four movable components, a total of five plane low pair cooperations with one degree of freedom, and one plane high pair cooperation with two degrees of freedom. According to the degree of freedom formula, the degree of freedom of the movable mechanism is: F=3n-2PL-Ph=3×4-2×5-1=1

[0051] Since the degree of freedom of the movable mechanism is one, the uniqueness and reliability of the motion trajectory of each movable component of the movable mechanism can be realized.

[0052] Based on the above connection relationship, the folding device not only can be folded, but also can move according to the preset folding track to obtain the required folding shape. When the first sliding member 24a rotates relative to the base 100, it drives the first rotating member 21a and the first synchronous member 22a to rotate relative to the base 100. It can be seen that when the first sliding member 24a slides relative to the first synchronous member 22a along the third direction A2, the first sliding member 24a generates a driving force on the first rotating member 21a, so that the first rotating member 21a slides and rotates (rolls) relative to the first sliding member 24a along the first direction A1. Since the first rotating member 21a is connected to the first synchronous member 22a through the first connecting member 23a, the first rotating member 21a can also drive the first synchronous member 22a to rotate. That is, the first rotating member 21a and the first synchronous member 22a can influence each other during movement and are synchronously driven.

[0053] Similarly, the second rotating mechanism 200b includes a second rotating member 21b, a second synchronous member 22b, a second sliding member 24b, and a second connecting member 23b (not shown in the figure), wherein one end of the second rotating member 21b is rotationally connected to the base 100 around a second fixed rotating shaft 201b, and the other end is rotationally connected to the second connecting member 23b around a second movable rotating shaft 203b; one end of the second synchronous member 22b is rotationally connected to the base 100 around a second fixed synchronous shaft 202b, and the other end is rotationally connected to the second connecting member 23b around a second movable synchronous shaft 204b; 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; the second sliding member 24b is slidably and rotationally (rollingly) connected to one end of the second rotating member 21b away from the base 100, and the second sliding member 24b is slidably connected to one end of the second synchronous member 22b away from the base 100; the second direction B1 and the fourth direction B2 are not parallel in the projection of the first plane C1.

[0054] Please refer to FIG. 5, in some embodiments, the distance from the first fixed rotating shaft 201a to the second plane C2 is less than the distance from the first fixed synchronous shaft 202a to the second plane C2, that is, W1 < W2, and the second plane C2 is a reference plane perpendicular to the width direction of the base 100 and located in the middle of the base 100. That is, the first fixed rotating shaft 201a is closer to the middle plane of the base 100 than the first fixed synchronous shaft 202a. In the folded state, the first rotating member 21a is located on the inner side of the first synchronous member 22a. Since the first synchronous member 22a is slidably connected to the first sliding member 24a, it has less freedom of movement relative to the first rotating member 21a and the first sliding member 24a, and the movement is more stable. Arranging the first rotating member 21a on the inner side of the first synchronous member 22a can improve the stability of the first rotating mechanism 200a in the folded state.

[0055] Please continue to refer to FIG. 5, further, 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, i.e. H1>H2, the third plane C3 is a reference plane which is perpendicular to the thickness direction of the base 100 and located at the bottom of the base 100. 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 base 100 width required to be set when the vertical line between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a is inclined to the third plane C3 is smaller than the base 100 width required 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 third plane C3. Therefore, the width of the base 100 can be designed to be narrower in this way.

[0056] Please refer to FIG. 7 and FIG. 8, FIG. 7 is a sectional view of the folding device at one section in the embodiment of FIG. 1, and FIG. 8 is a sectional view of the folding device at another section in the embodiment of FIG. 1. In this embodiment, the first arc-shaped slot 11a is arranged on the base 100, and the first rotating member 21a is arranged with the 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.

[0057] 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 corresponding inner part of the first arc-shaped rotating block 211a to the first arc-shaped slot 11a is reduced. The rotating connection between the first rotating member 21a and the base 100 is realized through the design of the first arc-shaped slot 11a and the first arc-shaped rotating block 211a, which not only can meet the requirements of the rotatable angle of the first rotating member 21a relative to the base 100, realize the switching between the folded state and the unfolded state, but also can design the thickness of the base 100 to be thinner, realize the light and thin design of the folding device in the thickness direction of the base 100.

[0058] Of course, the first rotating member 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 inside the base 100, and the first fixed rotating shaft 201a does not rotate relative to the base 100, the first fixed rotating shaft 201a can be fixedly connected to the base 100, and the first rotating member 21a is sleeved on the first fixed rotating shaft 201a and rotates around the first fixed rotating shaft 201a.

[0059] In addition, the first synchronous member 22a can also be connected with the base 100 in the form of an arc-shaped slot and an arc-shaped rotating block or in the form of a solid shaft, as long as the end of the first synchronous member 22a close to the base 100 can rotate around the first fixed synchronous shaft 202a.

[0060] Please refer to FIG. 3. In some embodiments, the distance between the first movable rotating shaft 203a and the first movable synchronous shaft 204a is equal to the distance between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a, and the distance between the first movable rotating shaft 203a and the first fixed rotating shaft 201a is equal to the distance between the first movable synchronous shaft 204a and the first fixed synchronous shaft 202a. That is, L1=L2, L3=L4, and the first rotating member 21a, the first synchronous member 22a, the first connecting member 23a and the base 100 form a parallelogram linkage. If the first synchronous member 22a is kept horizontal in the unfolded state, the rotation angle of the first synchronous member 22a when it rotates to the folded state is 90°. According to the principle that the opposite sides of a parallelogram are parallel and equal, the first rotating member 21a is kept horizontal in the unfolded state, and the rotation angle of the first rotating member 21a when it rotates to the folded state is also 90°. That is, the rotation angle of the first rotating member 21a and the first synchronous member 22a is the same when the first rotating mechanism 200a switches between the folded state and the unfolded state. In this way, the smoothness of the movement of the first rotating member 21a and the first synchronous member 22a can be improved.

[0061] Please refer to FIG. 9, which is a motion diagram of the first rotating mechanism in another embodiment. In some embodiments, the distance between the first movable rotating shaft 203a and the first movable synchronous shaft 204a is less than the distance between the first fixed rotating shaft 201a and the first fixed synchronous shaft 202a, and the distance between the first movable rotating shaft 203a and the first fixed rotating shaft 201a is equal to the distance between the first movable synchronous shaft 204a and the first fixed synchronous shaft 202a. That is, L1=L2, L3

[0062] Similarly, the distance between the second movable rotating shaft 203b and the second movable synchronous shaft 204b is less than the distance between the second fixed rotating shaft 201b and the second fixed synchronous shaft 202b, and the distance between the second movable rotating shaft 203b and the second fixed rotating shaft 201b is equal to the distance between the second movable synchronous shaft 204b and the second fixed synchronous shaft 202b. The second rotating member 21b, the second synchronous member 22b, the second connecting member 23b, and the base 100 form a four-bar linkage mechanism.

[0063] In some embodiments, the distance from the first movable rotating shaft 203a to the first movable synchronous shaft 204a is different from the distance from the first fixed rotating shaft 201a to the first fixed synchronous shaft 202a, and the distance from the first movable rotating shaft 203a to the first fixed rotating shaft 201a is different from the distance from the first movable synchronous shaft 204a to the first fixed synchronous shaft 202a. That is, L1≠L2, L3≠L4, so the movement angle of the first rotating member 21a is different from the movement angle of the first synchronous member 22a. When the rotating angle of the first synchronous member 22a is 90°, the rotating angle of the first rotating member 21a can be slightly less than 90°, or equal to 90° or slightly greater than 90°. Alternatively, L1+L3=L2+L4, so the first synchronous member 22a and the first rotating member 21a can rotate within the range of 0-180°; alternatively, L1+L3≠L2+L4, that is, the first rotating member 21a, the first synchronous member 22a, the first connecting member 23a and the base 100 form an arbitrary quadrilateral, as long as the rotating angle of the first rotating member 21a and the first synchronous member 22a can meet the requirement of switching the folding state and the unfolded state of the folding device. In this way, the design of the first rotating member 21a and the first synchronous member 22a can be more flexible.

[0064] The above has mentioned that in some embodiments, the sliding direction of the first rotating member 21a, the first synchronous member 22a and the first sliding member 24a 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 synchronous member 22a in the static state. In the process of rotating, 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 synchronous member 22a through the first rotating member 21a and the first synchronous member 22a. The connection mode of the first rotating member 21a, the first synchronous member 22a and the first sliding member 24a is further described below.

[0065] Please refer to FIG. 10 and FIG. 11, FIG. 10 is an overall exploded schematic view of the first rotating mechanism in the embodiment of FIG. 1, and FIG. 11 is a partial exploded schematic view of the first rotating mechanism in the embodiment of FIG. 1. In the embodiment, 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 column 215a, which can slide and rotate in the first sliding groove 241a. It can be understood that the first sliding member 24a can include a first inner side 245a and a first outer side 246a arranged oppositely, and the first inner side 245a can be a side close to the flexible display screen 500. The first direction A1 can be a direction in which the first inner side 245a faces the first outer side 246a, or a direction in which the first outer side 246a faces the first inner side 245a. Further, the axis of the first sliding column 215a is parallel to the first fixed rotating shaft 201a, and the first sliding groove 241a penetrates the first inner side 245a and the first outer side 246a of the first sliding member 24a, so that the first sliding column 215a can slide and rotate (roll) in the first sliding groove 241a. In particular, the first sliding column 215a can be fixedly connected with the first rotating member 21a, or rotatably connected with the first rotating member 21a.

[0066] The first sliding member 24a is provided with a third sliding groove 242a in a third direction A2, and the first synchronous member 22a is provided with a third sliding block 224a, which can slide along 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 third sliding block 224a and the third sliding groove 242a can guide the sliding between the first sliding member 24a and the first synchronous member 22a. The third sliding block 224a can be clamped in the third sliding groove 242a to prevent the first synchronous member 22a from being separated from the first sliding member 24a, thereby improving the stability of the movement of the first synchronous member 22a.

[0067] Optionally, the first sliding groove 241a and the third sliding groove 242a are arranged on the first sliding member 24a along the length direction of the first sliding member 24a.

[0068] Optionally, the third sliding groove 242a is a linear sliding groove.

[0069] 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.

[0070] Alternatively, when the folding device is in the unfolded state, the distance from the end of the third sliding groove 242a close to the base 100 to the bottom of the base 100 can also be equal to the distance from the end of the third sliding groove 242a away from the base 100 to the bottom of the base 100, which is not limited in the embodiments of the present application.

[0071] Optionally, the third sliding groove 242a is an arc-shaped sliding groove.

[0072] When the folding device is in the unfolded state, the axis of the third sliding groove 242a is located on the side of the third sliding groove 100 facing the base 100. When the first synchronous member 22a rotates from the unfolded state to the folded state, the first sliding member 24a moves along the third sliding groove 242a away from the base 100. During the clockwise rotation (i.e., the R direction in FIG. 9) of the first synchronous member 22a, because the third sliding groove 242a is an arc-shaped sliding groove, the first sliding member 24a can rotate clockwise relative to the first synchronous member 22a by a certain angle on the basis of the clockwise rotation of the first synchronous member 22a relative to the base 100, that is, the rotation angle of the first sliding member 24a relative to the second plane C2 is greater than the rotation angle of the first synchronous member 22a relative to the second plane C2. For example, if the first synchronous member 22a needs to rotate by 90°, and the first sliding member 24a needs to slide relative to the arc-shaped sliding groove on the first synchronous member 22a on the basis of the 90° rotation of the first synchronous member 22a, then the rotation angle of the first synchronous member 22a is greater than 90°. Conversely, if the rotation angle of the first sliding member 24a relative to the second plane C2 is 90°, then the rotation angle of the first synchronous member 22a is less than 90°. Therefore, when the first rotating mechanism 200a switches between the folded state and the unfolded state, that is, when the rotation angle of the first sliding member 24a relative to the second plane C2 is 90°, the required rotation angle of the first synchronous member 22a is less than 90°.

[0073] Alternatively, when the folding device is in the unfolded state, the axis of the third sliding groove 242a can also be located on the side of the third sliding groove 100 away from the base 100, which is not limited in the embodiments of the present application.

[0074] Optionally, the first sliding groove 241a is a straight sliding groove.

[0075] When the folding device is in the unfolded state, the distance from the end of the first sliding groove 241a close to the base 100 to the bottom of the base 100 is less than the distance from the end of the first sliding groove 241a away from the base 100 to the bottom of the base 100. In this way, the smoothness of the sliding of the first sliding block 212a along the first sliding groove 241a can be improved, and the interference of other structures in the first rotating shaft mechanism on the movement of the first rotating member 21a can be reduced.

[0076] Alternatively, when the folding device is in the unfolded state, the distance from the end of the first sliding groove 241a close to the base 100 to the bottom of the base 100 can also be greater than the distance from the end of the first sliding groove 241a away from the base 100 to the bottom of the base 100, which is not specifically limited in the embodiments of the present application.

[0077] Optionally, the first sliding groove 241a is an arc-shaped sliding groove.

[0078] When the folding device is in the unfolded state, the axis of the first sliding groove 241a is located on the side of the first sliding groove 241a facing 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 on the movement of the first rotating part 21a can be reduced.

[0079] Alternatively, when the folding device is in the unfolded state, the axis of the first sliding groove 241a can also be located on the side of the first sliding groove 241a away from the base 100, which is not specifically limited in the embodiments of the present application.

[0080] Please refer to FIGS. 12-14, FIG. 12 is a structural diagram of the first rotating mechanism in the unfolded state according to another embodiment, FIG. 13 is a structural diagram of the first rotating mechanism in the folded state according to the embodiment of FIG. 12, and FIG. 14 is a partial exploded schematic view of the first rotating mechanism according to the embodiment of FIG. 12.

[0081] In some embodiments, the folding device comprises 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 so that the folding device has a folded state and an unfolded state.

[0082] The first rotating mechanism 200a comprises a first rotating part 21a, a first synchronous part 22a, and a first sliding part 24a, wherein the first rotating part 21a is rotatably connected to the base 100 about a first fixed rotating shaft 201a; the first synchronous part 22a is rotatably connected to the base 100 about a first fixed synchronous shaft 202a. The first fixed synchronous shaft 202a and the first fixed rotating shaft 201a are parallel to each other and do not coincide. The first sliding part 24a is slidably connected to the end of the first rotating part 21a away from the base 100 in a first direction A1, and the first sliding part 24a is slidably and rotatably (rollingly) connected to the end of the first synchronous part 22a away from the base 100 in a third direction A2.

[0083] During the sliding and rotating (rolling) of the first sliding member 24a relative to the first synchronous member 22a, the first sliding member 24a and the first synchronous member 22a transmit force through point / line contact, and the friction therebetween is small, thereby improving the smoothness of the movement of the first sliding member 24a relative to the first rotating member 21a and the first synchronous member 22a. In the folded state, since the first direction A1 is not parallel to the third direction A2, the first rotating member 21a and the first synchronous member 22a restrict each other, and even if the electronic device provided with the folding device falls in the folded state, the risk of the first sliding member 24a instantaneously moving a large distance relative to the first rotating member 21a or the first synchronous member 22a in this state can be effectively reduced, thereby ensuring the reliability of the overall structure of the electronic device.

[0084] In this embodiment, the first sliding member 24a is provided with a first sliding groove 241a in the first direction A1, the first rotating member 21a is provided with a first sliding block 212a, and the first sliding block 212a can slide along the first sliding groove 241a; the first sliding member 24a is provided with a third sliding groove 242a in the third direction A2, which can be the direction in which the first sliding member 24a moves towards or away from the base 100, and the first synchronous member 22a is provided with a third sliding column 225a, which can slide along and rotate in the third sliding groove 242a. In particular, the third sliding column 225a can be fixedly connected with the first synchronous member 22a, or can be rotatably connected with the first synchronous member 22a.

[0085] Optionally, the third sliding groove 242a is a linear sliding groove.

[0086] When the folding device is in the unfolded state, the distance from the 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 end of the third sliding groove 242a away from the base 100 to the bottom of the base 100.

[0087] Alternatively, when the folding device is in the unfolded state, the distance from the end of the third sliding groove 242a close to the base 100 to the bottom of the base 100 can also be equal to the distance from the end of the third sliding groove 242a away from the base 100 to the bottom of the base 100, which is not specifically limited in the embodiments of the present application.

[0088] Optionally, the third sliding groove 242a is an arc-shaped sliding groove.

[0089] When the folding device is in the unfolded state, the axis of the first sliding groove 241a is located on the side of the first sliding groove 241a facing the base 100.

[0090] Alternatively, when the folding device is in the unfolded state, the axis of the first sliding groove 241a can also be located on the side of the first sliding groove 241a away from the base 100, which is not specifically limited in the embodiments of the present application.

[0091] Optionally, the first sliding groove 241a is a straight sliding groove.

[0092] When the folding device is in the unfolded state, the distance from the end of the first sliding groove 241a close to the base 100 to the bottom of the base 100 is less than the distance from the end of the first sliding groove 241a away from the base 100 to the bottom of the base 100.

[0093] Alternatively, when the folding device is in the unfolded state, the distance from the end of the first sliding groove 241a close to the base 100 to the bottom of the base 100 can also be greater than the distance from the end of the first sliding groove 241a away from the base 100 to the bottom of the base 100, which is not specifically limited in the embodiments of the present application.

[0094] Optionally, the first sliding groove 241a is an arc-shaped sliding groove.

[0095] When the folding device is in the unfolded state, the axis of the first sliding groove 241a is located on the side of the first sliding groove 241a facing the base 100.

[0096] Alternatively, when the folding device is in the unfolded state, the axis of the first sliding groove 241a can also be located on the side of the first sliding groove 241a away from the base 100, which is not specifically limited in the embodiments of the present application.

[0097] Similarly, in the second rotating mechanism 200b, the second sliding piece 24b is slidingly connected to the end of the second rotating piece 21b away from the base 100 in the second direction B1, and the second sliding piece 24b is slidingly and rotatably (rolling) connected to the end of the second synchronizing piece 22b away from the second synchronizing piece 22b in the fourth direction B2.

[0098] Please refer to FIG. 11, the embodiments of the first connecting piece 23a will be specifically described below. Exemplarily, the first connecting piece 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 piece 21a close to the first synchronizing piece 22a is provided with a first rotating fitting hole 213a, the first rotating fitting hole 213a is connected with the first rotating pin hole 231a through a first rotating pin 234a; the end of the first synchronizing piece 22a close to the first rotating piece 21a is provided with a first synchronizing fitting hole 221a, the first synchronizing fitting hole 221a is connected with the first synchronizing pin hole 232a through a first synchronizing pin 233a.

[0099] Similarly, the second connecting member 23b comprises a second rotating pin hole 231b and a second synchronizing pin hole 232b, the axes of the second rotating pin hole 231b and the second synchronizing pin hole 232b coincide with the second movable rotating shaft 203b and the second movable synchronizing shaft 204b respectively, the second rotating member 21b is provided with a second rotating fitting hole 213b at one end close to the second synchronizing member 22b, the second rotating fitting hole 213b is connected with the second rotating pin hole 231b through a second rotating pin 234b; the second synchronizing member 22b is provided with a second synchronizing fitting hole 221b at one end close to the second rotating member 21b, the second synchronizing fitting hole 221b is connected with the second synchronizing pin hole 232b through a second synchronizing pin 233b (not shown in the figure).

[0100] In some embodiments, 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 at one end of the first connecting member 23a close to the first rotating member 21a, 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. Alternatively, at least one of the first movable rotating shaft 203a and the first movable synchronizing shaft 204a can be a virtual shaft, specifically: one end of the first connecting member 23a is connected with the first rotating member 21a through a virtual shaft, and the other end is connected with the first synchronizing member 22a through a real shaft; one end of the first connecting member 23a is connected with the first synchronizing member 22a through a virtual shaft, and the other end is connected with the first rotating member 21a through a virtual shaft; both ends of the first connecting member 23a are connected with the first rotating member 21a and the first synchronizing member 22a through virtual shafts respectively. This embodiment is only described by taking the example that one end of the first connecting member 23a is connected with the first rotating member 21a through a virtual shaft, and the other end is connected with the first synchronizing member 22a through a real shaft.

[0101] Please refer to FIG. 15 and FIG. 16, FIG. 15 is a partial exploded schematic view of the first rotating mechanism in another embodiment, and FIG. 16 is a structural schematic view of the first connecting member in the embodiment of FIG. 15.

[0102] For example, the first rotating member 21a is provided with a first rotating connecting part 215a at one end close to the first synchronizing member 22a, the first connecting member 23a comprises a first inner curved surface 2361a and a first outer curved surface 2351a arranged oppositely, the first inner curved surface 2361a and the first outer curved surface 2351a are coaxially arranged, i.e., both take the first movable rotating shaft 203a as the axis, the first rotating connecting part 215a is clamped between the first inner curved surface 2361a and the first outer curved surface 2351a, and rotates along the first inner curved surface 2361a and the first outer curved surface 2351a.

[0103] The first synchronization member 22a is provided with a first synchronization fitting hole 221a near one end of the first rotating member 21a, and the first connecting member 23a is provided with a first synchronization pin hole 232a, and the first synchronization fitting hole 221a and the first synchronization pin hole 232a are connected by a first synchronization pin 233a.

[0104] In the embodiment, the first connecting member 23a comprises a first rotating connecting rod 236a and a first main body 235a fixedly connected, the first synchronization pin hole 232a is arranged on the first main body 235a, a first inner curved surface 2361a is arranged on the side surface of the first rotating connecting rod 236a, and a first outer curved surface 2351a is arranged on the side surface of the first main body 235a. The first rotating connecting rod 236a can be symmetrically arranged on the first main body 235a, and the first rotating connecting portion 215a is provided with an avoiding slot, so that the two ends of the first rotating connecting rod 236a can be respectively overlapped on the two sides of the avoiding slot, and the axial direction of the first rotating connecting rod 236a is limited, so as to prevent the first connecting member 23a from moving along the axial direction of the first rotating connecting rod 236a and affecting the stability of the structure. The first rotating connecting portion 215a is clamped between the first rotating connecting rod 236a and the first main body 235a, and the first rotating connecting portion 215a comprises a first rotating block 2151a, which is in an arc block structure. The matching surfaces of the first rotating connecting rod 236a, the first rotating connecting portion 215a and the first main body 235a are all arc-shaped, so that the first rotating connecting rod 236a and the first main body 235a can rotate relative to the first rotating block 2151a. Please refer to FIG. 1 and FIG. 17, which is an overall explosion schematic diagram of the first rotating mechanism from another perspective in the embodiment of FIG. 1.

[0105] In some embodiments, the folding device further comprises a first supporting member 25a, which is rotationally connected to the first sliding member 24a, and is slidingly and rotationally (rolling) connected to at least one of the first rotating member 21a and the first synchronization member 22a; when the first rotating mechanism 200a and the second rotating mechanism 200b rotate towards each other to the folding state, the distance from one end of the first supporting member 25a away from the base 100 to the second rotating mechanism 200b is less than the distance from one end of the first supporting member 25a close to the base 100 to the second rotating mechanism 200b.

[0106] Similarly, the second rotating mechanism 200b also comprises a second support 25b, the second rotating member 21b and the second synchronous member 22b are arranged between the second support 25b and the base 100, the second support 25b is rotationally connected to the second sliding member 24b, and is also slidingly and rotationally (rollingly) connected to at least one of the second rotating member 21b and the second synchronous member 22b. When the second rotating mechanism 200b and the second rotating mechanism 200b rotate towards each other to the folded state, 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.

[0107] 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 flexible display screen 500, and is rotationally connected to the first sliding member 24a, and is slidingly and rotationally (rollingly) connected to at least one of the first rotating member 21a and the first synchronous member 22a; and the second support 25b can support the flexible display screen 500, and is rotationally connected to the second sliding member 24b, and is slidingly and rotationally (rollingly) connected to at least one of the second rotating member 21b and the second synchronous member 22b.

[0108] The first support 25a and the second support 25b are mainly used for supporting the flexible display screen 500 in the folding device, the first support 25a comprises a first support part 251a, the second support 25b comprises a second support part 251b, the first support part 251a and the second support part 251b can be fixedly connected with the flexible display screen 500, and the first support part 251a and the second support part 251b are both rectangular plate structures. The first support 25a and the second support 25b are driven mechanisms of the folding device, the first support 25a is limited by the movement track of the first rotating mechanism 200a and thus moves, the second support 25b is limited by the movement track of the second rotating mechanism 200b and thus moves, and finally the required folding mode is realized. In the embodiment, when the first rotating mechanism 200a and the second rotating mechanism 200b rotate towards each other to the folding state, the distance from one end of the first support 25a away from the base 100 to the second rotating mechanism 200b is less than the distance from one end of the first support 25a close to the base 100 to the second rotating mechanism 200b, and the distance from one end of the second support 25b away from the base 100 to the first rotating mechanism 200a is less than the distance from one 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 one ends of the first support 25a and the second support 25b away from the base 100 is less than the distance between the one 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 large eight-shaped structure with respect to the base 100. In the folding state, the first support 25a, the second support 25b and the base 100 form a containing space of the flexible display screen 500, the first support 25a and the second support 25b form a large eight-shaped structure, which can avoid the flexible display screen 500 and avoid extruding the flexible display screen 500, so that the flexible display screen 500 is folded to form a continuous water drop shape.

[0109] Please refer to FIG. 17, the first support 25a mentioned above can be slidably and rotatably (rollably) connected to at least one of the first rotating member 21a and the first synchronous member 22a, and three specific embodiments are introduced in the present application: the first support 25a is slidably and rotatably (rollably) connected to the first rotating member 21a, the first support 25a is slidably and rotatably (rollably) connected to the first synchronous member 22a, and the first support 25a is slidably and rotatably (rollably) connected to the first rotating member 21a and the first synchronous member 22a at the same time.

[0110] For the first 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.

[0111] In the 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. For example, the first guiding part 253a includes a first guiding hole 2531a arranged on the side of the first support part 251a away from the flexible display screen 500, and the first rolling part 214a includes 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 (roll) relative to the first guiding hole 2531a, so as to make the first support 25a slide and rotate (roll) relative to the first rotating member 21a.

[0112] 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 the 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 (roll) relative to the first rolling shaft 2141a.

[0113] 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.

[0114] Optionally, the first guiding hole 2531a can be an arc-shaped slot, or can be a straight line-shaped slot.

[0115] For the second embodiment, for example, the first support 25a and the first synchronous member 22a 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.

[0116] The design of the first guiding part 253a and the first rolling part 214a can refer to the first embodiment which has been described in detail above, and will not be described here again.

[0117] For the third embodiment, exemplarily, 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 support 25a and the first synchronous member 22a are connected through the first guiding part 253a and the first rolling part 214a. That is, the third embodiment provided by the present application simultaneously satisfies the first embodiment and the second embodiment, and thus the present application will not be described here again for the third embodiment, please refer to the above two embodiments.

[0118] Please refer to FIG. 10, in addition to the rotating and sliding connection with the first rotating member 21a and / or the first synchronous member 22a, the first support 25a is also rotatably connected with the first sliding member 24a, that is, the end of the first support 25a away from the base 100 is rotatably connected with the first sliding member 24a. Specifically, the first support 25a and the first sliding member 24a are provided with a first rotating guiding part 243a and a first rotating matching part 254a, the first rotating guiding part 243a is arranged on one of the first support 25a and the first sliding member 24a, and the first rotating matching part 254a is arranged on the other one of the first support 25a and the first rotating member 21a.

[0119] Among them, the first rotating guiding part 243a includes a first rotating groove 2431a, and the first rotating matching part 254a includes a first rotating block 2541a, the first rotating groove 2431a is in a circular arc shape, and the first rotating block 2541a is in clearance fit with the first rotating groove 2431a and slides in the first rotating groove 2431a. It can be understood that, in the sliding process of the first rotating block 2541a in the circular arc-shaped first rotating groove 2431a, the first rotating member 21a rotates relative to the base 100. In some scenarios, the first rotating block 2541a is arranged on the first support 25a, and the first rotating groove 2431a is arranged on the first sliding member 24a; in other scenarios, the first rotating block 2541a is arranged on the first sliding member 24a, and the first rotating groove 2431a is arranged on the first support 25a.

[0120] The first rotating matching part 254a is arranged on the first supporting part 251a away from the flexible display 500. The first rotating matching part 254a and the first supporting part 251a can be an integral structure or a split structure. When the first rotating matching part 254a and the first supporting part 251a are an integral structure, the first rotating matching part 254a and the first supporting part 251a are prepared by one process. However, for the convenience of understanding, the first rotating matching part 254a and the first supporting part 251a are artificially named differently. When the first rotating matching part 254a and the first supporting part 251a are a split structure, the first rotating matching part 254a and the first supporting part 251a are prepared separately and then connected together by various methods. Further, the first rotating matching part 254a and the first guiding part 253a are arranged on the first supporting part 251a, and the first rotating matching part 254a and the first rolling part 214a are located on the side of the first supporting part 251a away from the flexible display 500. The first rotating matching part 254a, the first guiding part 253a and the first supporting part 251a are an integral structure, that is, the first rotating matching part 254a, the first supporting part 251a and the first guiding part 253a are prepared by one process. Alternatively, the first rotating matching part 254a, the first supporting part 251a and the first guiding part 253a are a split structure, that is, the first rotating matching part 254a, the first supporting part 251a and the first guiding part 253a are prepared separately and then combined together by various methods. Alternatively, part of the first rotating matching part 254a, the first supporting part 251a and the first guiding part 253a is an integral structure, and the remaining part is a split structure, that is, part of the first rotating matching part 254a, the first supporting part 251a and the first guiding part 253a is prepared by one process, and the remaining part is prepared separately and then combined together by various methods.

[0121] 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.

[0122] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive of other embodiments. It is expressly understood that the embodiments described herein can be combined with other embodiments.

[0123] 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.

[0124] Clause

[0125] 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:

[0126] a first rotating member rotatably connected to the base about a first fixed rotating axis;

[0127] a first synchronizing member rotatably connected to the base about a first fixed synchronizing axis, the first fixed synchronizing axis and the first fixed rotating axis are parallel to each other and do not coincide;

[0128] a first sliding member is slidably and rotatably connected to one end of the first rotating member away from the base along a first direction, and the first sliding member is slidably connected to one end of the first synchronizing member away from the base along a third direction;

[0129] the first direction and the third direction are not parallel in a projection on a first plane, and the first plane is a reference plane perpendicular to the first fixed rotating axis.

[0130] Clause 2, the folding device according to claim 1, wherein the first sliding member is provided with a first sliding groove along the first direction, and the first rotating member is provided with a first sliding column, the first sliding column being slidable and rotatable in the first sliding groove.

[0131] the first sliding member is provided with a third sliding groove along the third direction, and the first synchronizing member is provided with a third sliding block, the third sliding block being slidable in the third sliding groove.

[0132] Clause 3, the folding device according to claim 2, wherein the first sliding groove is a linear sliding groove or an arc-shaped sliding groove.

[0133] Clause 4, the folding device according to claim 2, wherein the third sliding groove is a linear sliding groove or an arc-shaped sliding groove.

[0134] Clause 5, the folding device according to any one of claims 1-4, wherein a distance from the first fixed rotating axis to a second plane is less than a distance from the first fixed synchronizing axis to the second plane, and the second plane is a reference plane perpendicular to a width direction of the base and located in the middle of the base.

[0135] Clause 6, the folding device according to claim 5, wherein a distance from the first fixed rotating axis to a third plane is greater than a distance from the first fixed synchronizing axis to the third plane, and the third plane is a reference plane perpendicular to a thickness direction of the base and located at the bottom of the base.

[0136] Clause 7, the folding device according to any one of claims 1-4, wherein the first synchronizing member is movably connected to the first rotating member.

[0137] Clause 8, the folding device according to claim 7, wherein a first rolling groove and a first rolling column are arranged between the first rotating member and the first synchronizing member, the first rolling groove is arranged in one of the first rotating member and the first synchronizing member, the first rolling column is arranged in the other one of the first rotating member and the first synchronizing member, and the first rolling column is insertable into and rollable in the first rolling groove.

[0138] Clause 9, the folding device of claim 8, wherein the first rolling groove is a straight line sliding groove or an arc line sliding groove.

[0139] Clause 10, the folding device of claim 7, wherein the first rotating mechanism further comprises a first connecting member, the first rotating member is rotationally connected with the first connecting member around a first movable rotating axis, the first synchronizing member is rotationally connected with the first connecting member around a first movable synchronizing axis, the first movable rotating axis, the first movable synchronizing axis, the first fixed synchronizing axis and the first fixed rotating axis are parallel to each other and do not coincide.

[0140] Clause 11, the folding device of claim 10, wherein a distance from the first movable rotating axis to the first movable synchronizing axis is equal to a distance from the first fixed rotating axis to the first fixed synchronizing axis, and a distance from the first movable rotating axis to the first fixed rotating axis is equal to a distance from the first movable synchronizing axis to the first fixed synchronizing axis.

[0141] Clause 12, the folding device of claim 10, wherein a distance from the first movable rotating axis to the first movable synchronizing axis is less than a distance from the first fixed rotating axis to the first fixed synchronizing axis, and a distance from the first movable rotating axis to the first fixed rotating axis is equal to a distance from the first movable synchronizing axis to the first fixed synchronizing axis.

[0142] Clause 13, the folding device of claim 10, wherein the first connecting member comprises a first rotating pin hole and a first synchronizing pin hole, axes of the first rotating pin hole and the first synchronizing pin hole coincide with the first movable rotating axis and the first movable synchronizing axis respectively, an 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 is connected with the first rotating pin hole through a first rotating pin; an 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 is connected with the first synchronizing pin hole through a first synchronizing pin.

[0143] Clause 14, the folding device of any one of claims 1-4, wherein the folding device further comprises a first supporting member, the first supporting member is rotationally connected with the first sliding member, and is further slidingly and rotationally connected with at least one of the first rotating member and the first synchronizing member.

[0144] When the first rotating mechanism and the second rotating mechanism rotate towards each other to the folding state, a distance from an end of the first supporting member away from the base to the second rotating mechanism is less than a distance from an end of the first supporting member close to the base to the second rotating mechanism.

[0145] Clause 15, the folding device according to any one of claims 1-4, wherein the second rotating mechanism comprises:

[0146] a second rotating member rotatably connected to the base about a second fixed rotating axis;

[0147] a second synchronizing member rotatably connected to the base about a second fixed synchronizing axis, the second fixed synchronizing axis being parallel to the second fixed rotating axis and not coinciding with the second fixed rotating axis;

[0148] a second sliding member slidingly and rotatably connected to an end of the second rotating member away from the base along a second direction, and slidingly connected to an end of the second synchronizing member away from the base along a fourth direction;

[0149] the second direction and the fourth direction are not parallel in a projection on a first plane.

[0150] Clause 16, 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 rotatably connected to opposite sides of the base respectively to make the folding device have a folded state and an unfolded state, the first rotating mechanism comprising:

[0151] a first rotating member rotatably connected to the base about a first fixed rotating axis;

[0152] a first synchronizing member rotatably connected to the base about a first fixed synchronizing axis, the first fixed synchronizing axis being parallel to the first fixed rotating axis and not coinciding with the first fixed rotating axis;

[0153] a first sliding member slidingly connected to an end of the first rotating member away from the base along a first direction, and slidingly connected to an end of the first synchronizing member away from the base along a third direction;

[0154] the first direction and the third direction are not parallel in a projection on a first plane, the first plane being a reference plane perpendicular to the first fixed rotating axis.

[0155] Clause 17, the folding device according to claim 16, wherein the first sliding member is provided with a first sliding groove along the first direction, the first rotating member is provided with a first sliding column, and the first sliding column is rollable in the first sliding groove;

[0156] the first sliding member is provided with a third sliding groove along the third direction, the first synchronizing member is provided with a third sliding block, and the third sliding block is slidable along the third sliding groove.

[0157] Clause 18, the folding device according to claim 17, wherein the first sliding groove is a linear sliding groove or an arc-shaped sliding groove.

[0158] Clause 19, the folding device of claim 17, wherein the third sliding groove is a straight sliding groove or an arc sliding groove.

[0159] Clause 20, the folding device of any one of claims 16-19, wherein the first rotating member is movably connected with the first sliding member.

[0160] Clause 21, the folding device of claim 20, wherein a first rolling groove and a first rolling column are arranged between the first rotating member and the first synchronous member, the first rolling groove is arranged in one of the first rotating member and the first synchronous member, the first rolling column is arranged in the other one of the first rotating member and the first synchronous member, the first rolling column is insertable into and rollable in the first rolling groove.

[0161] Clause 22, the folding device of claim 20, wherein the first rotating mechanism further comprises a first connecting member, the first rotating member is rotationally connected with the first connecting member around a first movable rotating axis, the first synchronous member is rotationally connected with the first connecting member around a first movable synchronous axis, the first movable rotating axis, the first movable synchronous axis, the first fixed synchronous axis and the first fixed rotating axis are parallel to each other and do not coincide with each other.

[0162] Clause 23, 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 rotationally connected to opposite sides of the base respectively to make the folding device have a folded state and an unfolded state, the first rotating mechanism comprises:

[0163] a first rotating member, rotationally connected to the base around a first fixed rotating axis;

[0164] a first synchronous member, rotationally connected to the base around a first fixed synchronous axis, the first fixed synchronous axis and the first fixed rotating axis are parallel to each other and do not coincide with each other;

[0165] a first sliding member, slidably connected to an end of the first rotating member away from the base along a first direction, the first sliding member is slidably and rotationally connected to an end of the first synchronous member away from the base along a third direction;

[0166] a projection of the first direction and the third direction on a first plane is not parallel, the first plane is a reference plane perpendicular to the first fixed rotating axis.

[0167] Clause 24, the folding device of claim 23, wherein the first sliding member is provided with a first sliding groove in a first direction, and the first rotating member is provided with a first sliding block, the first sliding block being slidable along the first sliding groove.

[0168] The first sliding member is provided with a third sliding groove in a third direction, and the first synchronous member is provided with a third sliding column, the third sliding column being slidable along and rotatable within the third sliding groove.

[0169] Clause 25, the folding device of claim 24, wherein the first sliding groove is a linear sliding groove or an arc-shaped sliding groove.

[0170] Clause 26, the folding device of claim 24, wherein the third sliding groove is a linear sliding groove or an arc-shaped sliding groove.

[0171] Clause 27, the folding device of any one of claims 23-26, wherein the first rotating member is movably connected with the first synchronous member.

[0172] Clause 28, the folding device of claim 27, wherein a first rolling groove and a first rolling column are provided between the first rotating member and the first synchronous member, the first rolling groove being provided in one of the first rotating member and the first synchronous member, the first rolling column being provided in the other one of the first rotating member and the first synchronous member, the first rolling column being insertable into and rotatable within the first rolling groove.

[0173] Clause 29, the folding device of claim 27, wherein the first rotating mechanism further comprises a first connecting member, the first rotating member being rotatably connected with the first connecting member about a first movable rotating axis, and the first synchronous member being rotatably connected with the first connecting member about a first movable synchronous axis, the first movable rotating axis, the first movable synchronous axis, the first fixed synchronous axis and the first fixed rotating axis being parallel to each other and not coinciding with each other.

[0174] Clause 30, an electronic device, comprising a first housing, a second housing, a flexible display screen and a folding device as claimed in any one of claims 1-29, wherein:

[0175] The first housing is fixedly connected with the first sliding member, 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, wherein, The folding device 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 rotatably connected to the base about a first fixed rotating axis; a first synchronizing member rotatably connected to the base about a first fixed synchronizing axis, the first fixed synchronizing axis and the first fixed rotating axis are parallel to each other and do not coincide with each other; a first sliding member slidably and rotatably connected to one end of the first rotating member away from the base along a first direction, and the first sliding member is slidably connected to one end of the first synchronizing member away from the base along a third direction; the first direction and the third direction are not parallel in the projection on a first plane, and the first plane is a reference plane perpendicular to the first fixed rotating axis.

2. The folding device of claim 1, wherein, the first sliding member is provided with a first sliding groove along the first direction, the first rotating member is provided with a first sliding column, and the first sliding column can slide along the first sliding groove and rotate in the first sliding groove; the first sliding member is provided with a third sliding groove along the third direction, and the first synchronizing member is provided with a third sliding block, and the third sliding block can slide along the third sliding groove.

3. The folding device of claim 2, wherein, the first sliding groove is a linear sliding groove or an arc-shaped sliding groove.

4. The folding device of claim 2, wherein, the third sliding groove is a linear sliding groove or an arc-shaped sliding groove.

5. The folding device according to any one of claims 1-4, wherein, the distance from the first fixed rotating axis to a second plane is less than the distance from the first fixed synchronizing axis to the second plane, and the second plane is a reference plane perpendicular to the width direction of the base and located in the middle of the base.

6. The folding device of claim 5, wherein, the distance from the first fixed rotating axis to a third plane is greater than the distance from the first fixed synchronizing axis to the third plane, and the third plane is a reference plane perpendicular to the thickness direction of the base and located at the bottom of the base.

7. The folding device according to any one of claims 1-4, wherein, the first synchronizing member is movably connected with the first rotating member.

8. The folding device of claim 7, wherein, a first rolling groove and a first rolling column are arranged between the first rotating member and the first synchronizing member, the first rolling groove is arranged in one of the first rotating member and the first synchronizing member, the first rolling column is arranged in the other one of the first rotating member and the first synchronizing member, the first rolling column can be inserted into the first rolling groove and roll in the first rolling groove.

9. The folding device of claim 8, wherein, the first rolling groove is a linear sliding groove or an arc-shaped sliding groove.

10. The folding apparatus of claim 7, wherein, the first rotating mechanism further comprises a first connecting member, the first rotating member is rotatably connected with the first connecting member about a first movable rotating axis, and the first synchronizing member is rotatably connected with the first connecting member about a first movable synchronizing axis, and the first movable rotating axis, the first movable synchronizing axis, the first fixed synchronizing axis and the first fixed rotating axis are parallel to each other and do not coincide with each other.

11. The folding device of claim 10, wherein, the distance from the first movable rotating axis to the first movable synchronizing axis is equal to the distance from the first fixed rotating axis to the first fixed synchronizing axis, and the distance from the first movable rotating axis to the first fixed rotating axis is equal to the distance from the first movable synchronizing axis to the first fixed synchronizing axis.

12. The folding apparatus of claim 10, wherein, The distance from the first movable rotating shaft to the first movable synchronous shaft is smaller than the distance from the first fixed rotating shaft to the first fixed synchronous shaft, and the distance from the first movable rotating shaft to the first fixed rotating shaft is equal to the distance from the first movable synchronous shaft to the first fixed synchronous shaft.

13. The folding apparatus of claim 10, wherein, The first connecting piece 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 rotating shaft and the first movable synchronous shaft respectively, one end of the first rotating piece close to the first synchronous piece is provided with a first rotating fitting hole, and the first rotating fitting hole is connected with the first rotating pin hole through a first rotating pin; one end of the first synchronous piece close to the first rotating piece is provided with a first synchronous fitting hole, and the first synchronous fitting hole is connected with the first synchronous pin hole through a first synchronous pin.

14. The folding device according to any one of claims 1-4, wherein, The folding device further comprises a first supporting piece, the first supporting piece is rotationally connected to the first sliding piece, and is further slidingly and rotationally connected to at least one of the first rotating piece and the first synchronous piece; When the first rotating mechanism and the second rotating mechanism rotate towards each other to the folding state, the distance from one end of the first supporting piece away from the base to the second rotating mechanism is smaller than the distance from one end of the first supporting piece close to the base to the second rotating mechanism.

15. The folding device according to any one of claims 1-4, wherein, The second rotating mechanism comprises: a second rotating piece rotationally connected to the base about a second fixed rotating shaft; a second synchronous piece rotationally connected to the base about a second fixed synchronous shaft, the second fixed synchronous shaft and the second fixed rotating shaft are parallel to each other and do not coincide with each other; a second sliding piece slidingly and rotationally connected to one end of the second rotating piece away from the base along a second direction, and the second sliding piece is slidingly connected to one end of the second synchronous piece away from the base along a fourth direction; The projections of the second direction and the fourth direction on a first plane are not parallel.

16. A folding device, wherein, The folding device comprises a base, a first rotating mechanism and a second rotating mechanism, the first rotating mechanism and the second rotating mechanism are rotationally connected to opposite sides of the base respectively to make the folding device have a folding state and an unfolding state, and the first rotating mechanism comprises: a first rotating piece rotationally connected to the base about a first fixed rotating shaft; a first synchronous piece rotationally connected to the base about a first fixed synchronous shaft, the first fixed synchronous shaft and the first fixed rotating shaft are parallel to each other and do not coincide with each other; a first sliding piece rollingly connected to one end of the first rotating piece away from the base along a first direction, and the first sliding piece is slidingly connected to one end of the first synchronous piece away from the base along a third direction; The projections of the first direction and the third direction on a first plane are not parallel, and the first plane is a reference plane perpendicular to the first fixed rotating shaft.

17. The folding apparatus of claim 16, wherein, The first sliding piece is provided with a first sliding groove along the first direction, and the first rotating piece is provided with a first sliding column, and the first sliding column can roll in the first sliding groove; The first sliding member is provided with a third sliding groove in a third direction, and the first synchronous member is provided with a third sliding block which can slide along the third sliding groove.

18. The folding apparatus of claim 17, wherein, The first sliding groove is a linear sliding groove or an arc-shaped sliding groove.

19. The folding apparatus of claim 17, wherein, The third sliding groove is a linear sliding groove or an arc-shaped sliding groove.

20. The folding device according to any one of claims 16-19, wherein, The first rotating member is movably connected with the first sliding member.

21. The folding apparatus of claim 20, wherein, The first rotating member and the first synchronous member are provided with a first rolling groove and a first rolling column, the first rolling groove is arranged on one of the first rotating member and the first synchronous member, the first rolling column is arranged on the other one of the first rotating member and the first synchronous member, and the first rolling column can be inserted into and roll in the first rolling groove.

22. The folding apparatus of claim 20, wherein, The first rotating mechanism further comprises a first connecting member, the first rotating member is rotationally connected with the first connecting member around a first movable rotating shaft, and the first synchronous member is rotationally connected with the first connecting member around a first movable synchronous shaft, the first movable rotating shaft, the first movable synchronous shaft, the first fixed synchronous shaft and the first fixed rotating shaft are parallel to each other and do not coincide with each other.

23. A folding device, wherein, The folding device comprises a base, a first rotating mechanism and a second rotating mechanism, the first rotating mechanism and the second rotating mechanism are rotationally connected to opposite sides of the base respectively so that the folding device has a folded state and an unfolded state, and the first rotating mechanism comprises: a first rotating member which is rotationally connected to the base around a first fixed rotating shaft; a first synchronous member which is rotationally connected to the base around a first fixed synchronous shaft, the first fixed synchronous shaft and the first fixed rotating shaft are parallel to each other and do not coincide with each other; a first sliding member which is slidingly connected to one end of the first rotating member away from the base in a first direction, and the first sliding member is slidingly and rotationally connected to one end of the first synchronous member away from the base in a third direction; the first direction and the third direction are not parallel in the projection on a first plane, and the first plane is a reference plane perpendicular to the first fixed rotating shaft.

24. The folding apparatus of claim 23, wherein, The first sliding member is provided with a first sliding groove in a first direction, and the first rotating member is provided with a first sliding block which can slide along the first sliding groove. The first sliding member is provided with a third sliding groove in a third direction, and the first synchronous member is provided with a third sliding block which can slide along the third sliding groove.

25. The folding apparatus of claim 24, wherein, The first sliding groove is a linear sliding groove or an arc-shaped sliding groove.

26. The folding apparatus of claim 24, wherein, The third sliding groove is a linear sliding groove or an arc-shaped sliding groove.

27. The folding apparatus of any one of claims 23-26, wherein, The first rotating member is movably connected with the first synchronous member.

28. The folding apparatus of claim 27, wherein, The first rotating member and the first synchronous member are provided with a first rolling groove and a first rolling column, the first rolling groove is arranged on one of the first rotating member and the first synchronous member, the first rolling column is arranged on the other one of the first rotating member and the first synchronous member, and the first rolling column can be inserted into and roll in the first rolling groove.

29. The folding apparatus of claim 27, wherein, The first rotating mechanism further comprises a first connecting member, the first rotating member is rotationally connected with the first connecting member around a first movable rotating shaft, the first synchronizing member is rotationally connected with the first connecting member around a first movable synchronizing shaft, and the first movable rotating shaft, the first movable synchronizing shaft, the first fixed synchronizing shaft and the first fixed rotating shaft are parallel to each other and do not coincide with each other.

30. An electronic device, comprising: The folding device comprises a first shell, a second shell, a flexible display screen and the folding device according to any one of claims 1-29, wherein: The first shell is fixedly connected with the first sliding member, the second shell is connected with the second rotating mechanism, and the flexible display screen continuously covers the first shell, the base and the second shell.

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