CN115529372A

CN115529372A - Electronic equipment, folding assembly and folding device

Info

Publication number: CN115529372A
Application number: CN202110713897.2A
Authority: CN
Inventors: 徐正一; 马春军; 牛林辉; 王岗超; 管城豪; 龚泽坤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-12-27
Also published as: WO2022268126A1

Abstract

The application discloses electronic equipment, folding assembly and folding device. The electronic equipment comprises a folding device and a flexible display screen, wherein the folding device comprises a first shell, a folding assembly and a second shell which are sequentially connected, and the folding assembly comprises a middle shaft, a first fixing frame, a first rotating arm, a first elastic piece, a second fixing frame, a second rotating arm and a second elastic piece. The second end of the first rotating arm is an arc-shaped arm and is arranged in the first arc-shaped groove of the first fixing frame. Two ends of the first elastic piece are respectively contacted with the second end of the first rotating arm and the first fixing frame. The second end of the second rotating arm is an arc-shaped arm and is arranged on the second arc-shaped groove of the second fixed frame. Two ends of the second elastic piece are respectively contacted with the second end of the second rotating arm and the second fixed frame. When the folding assembly is in an opening state, the first elastic piece and the second elastic piece are in a compression state to prop open the bending part of the flexible display screen, so that the bending part of the flexible display screen has better flatness and longer service life.

Description

Electronic equipment, folding assembly and folding device

Technical Field

The application relates to the technical field of foldable electronic products, in particular to an electronic device, a folding assembly and a folding device.

Background

In recent years, flexible display screens are widely used in various foldable electronic devices due to their characteristics of being light, thin, and not fragile. The foldable electronic equipment further comprises a folding device for bearing the flexible display screen, the folding device can be unfolded to an open state or folded to a closed state, and the flexible display screen is unfolded or folded along with the folding device. However, the bent portion of the flexible display screen is easily arched and damaged when the electronic device is in an open state, which results in a shortened service life of the flexible display screen.

Disclosure of Invention

An object of the application is to provide an electronic device, a folding assembly and a folding device. Electronic equipment includes folding device and flexible display screen, and folding device includes first casing, second casing and connects the folding assembly of first casing and second casing, and the portion of bending of flexible display screen corresponds the folding assembly setting, and when folding device was in the open mode, the roughness preferred of the portion of bending of flexible display screen, flexible display screen is not fragile, and the reliability is higher, and life is longer.

In a first aspect, the present application provides an electronic device comprising a folding apparatus and a flexible display screen. The folding device comprises a first shell, a second shell and a folding assembly, wherein the folding assembly is connected with the first shell and the second shell, and the first shell and the second shell can be relatively unfolded to be in an open state or relatively folded to be in a closed state through the movement of the folding assembly.

The flexible display screen comprises a first non-bending part, a bending part and a second non-bending part which are sequentially arranged, the first non-bending part is fixed on the first shell, the second non-bending part is fixed on the second shell, and the bending part is deformed in the process that the first shell and the second shell are relatively unfolded or relatively folded.

In this application, the flexible display screen can be unfolded or folded with the folding device. When the electronic equipment is in an open state, the flexible display screen is in a flat-open state and can display in a full screen mode, so that the electronic equipment has a large display area, and the watching experience of a user is improved. When the electronic equipment is in the closed state, the plane size of the electronic equipment is smaller, and the electronic equipment is convenient for a user to carry and store.

The folding assembly comprises a middle shaft, a first fixing frame, a first rotating arm, a first elastic piece, a second fixing frame, a second rotating arm and a second elastic piece. The first fixing frame is fixedly connected with the first shell, and the second fixing frame is fixedly connected with the second shell. The first rotating arm comprises a first end and a second end, the first end of the first rotating arm is rotatably connected with the middle shaft, the first fixing frame comprises a first arc-shaped groove, and the second end of the first rotating arm is an arc-shaped arm and is installed in the first arc-shaped groove to be rotatably connected with the first fixing frame. The first elastic piece is arranged on the first fixing frame, one end, close to the middle shaft, of the first elastic piece contacts with the second end of the first rotating arm, and one end, far away from the middle shaft, of the first elastic piece contacts with the first fixing frame. The second rotating arm comprises a first end and a second end, the first end of the second rotating arm is rotatably connected with the middle shaft, the second fixing frame comprises a second arc-shaped groove, and the second end of the second rotating arm is an arc-shaped arm and is arranged in the second arc-shaped groove to be rotatably connected with the second fixing frame. The second elastic piece is arranged on the second fixing frame, one end, close to the central shaft, of the second elastic piece contacts the second end of the second rotating arm, and one end, far away from the central shaft, of the second elastic piece contacts the second fixing frame. When the first shell and the second shell are in an opening state, the first elastic piece and the second elastic piece are in a compression state.

In the application, the first housing and the second housing can be relatively unfolded to an open state or relatively folded to a closed state, and the folding device and the folding assembly also have the corresponding open state and closed state corresponding to the electronic device having the open state and the closed state. The first fixing frame of the folding assembly is rotatably connected with the middle shaft through the first rotating arm, the second fixing frame is rotatably connected with the middle shaft through the second rotating arm, and the first fixing frame and the second fixing frame can rotate relative to the middle shaft to be relatively unfolded to be in an open state or relatively folded to be in a closed state.

In the folding assembly, the first rotating arm is rotatably connected with the first fixing frame through a virtual shaft structure, and a certain gap is designed in the first fixing frame at the second end of the first rotating arm so as to realize smooth rotating motion. When the first shell and the second shell are in an open state, the first elastic piece is in a compressed state, two ends of the first elastic piece are respectively contacted with the second ends of the first fixing frame and the first rotating arm, and the elastic force generated by the first elastic piece enables the first fixing frame and the first rotating arm to be spread in directions away from each other so as to absorb a gap between the first fixing frame and the first rotating arm and enable the first fixing frame and the first rotating arm to move in place in the open state.

The second rotating arm is rotatably connected with the second fixing frame through a virtual shaft structure, and a certain gap is designed in the second fixing frame at the second end of the second rotating arm so as to realize smooth rotating motion. When the first shell and the second shell are in an opening state, the second elastic piece is also in a compression state, two ends of the second elastic piece are respectively contacted with second ends of the second fixing frame and the second rotating arm, and elastic force generated by the second elastic piece enables the second fixing frame and the second rotating arm to be spread in directions far away from each other so as to absorb a gap between the second fixing frame and the second rotating arm and enable the second fixing frame and the second rotating arm to move in place in the opening state.

In this application, because the clearance between first mount and the first rotor arm is absorbed, the clearance between second mount and the second rotor arm is absorbed, first mount and second mount expand to the direction of keeping away from the axis and target in place, consequently folding assembly can prop the portion of bending of flat flexible display screen better, avoids flexible display screen because long-term buckling and the problem that leads to middle hunch-up to improve flexible display screen's roughness and reliability.

In this application, first rotor arm rotates through virtual axle construction and connects first mount, is favorable to reducing the thickness of first mount, and the second rotor arm rotates through virtual axle construction and connects the second mount, is favorable to reducing the thickness of second mount for folding assembly is lower to installation space's requirement, and the folding assembly is little with the equipment degree of difficulty of first casing and second casing, and is favorable to attenuate folding device and electronic equipment's whole thickness.

The two components are rotationally connected through a virtual shaft structure, namely that the two components do not rotate mutually through a solid rotating shaft, but rotate relatively around a rotating center through the structures of the arc-shaped arm and the arc-shaped groove.

In a possible implementation manner, when the first housing and the second housing are in the closed state, the first elastic member and the second elastic member are in a compressed state.

In this implementation, when first casing and second casing are in the closed condition, first elastic component and second elastic component are in compression state, and the elastic force that first elastic component and second elastic component produced can realize absorbing the purpose in movement clearance equally for flexible display screen is propped open by folding device, is difficult for producing fold or hunch-up, with higher reliability.

The state of the first elastic element and the second elastic element may change during the movement of the folding assembly, for example, between a compressed state and a natural state, or a degree of compression may change, which is not strictly limited in this application. The first elastic member and the second elastic member may be compressed in the same degree or in different degrees in the open state and the closed state, which is not strictly limited in this application. For example, in some other implementations, when the first housing and the second housing are in the closed state, the first elastic member and the second elastic member may also be in a natural state.

In a possible implementation manner, the first elastic element includes a first elastic main body and a first support, the first support is made of a hard material, the first support abuts against the first rotating arm, and two ends of the first elastic main body respectively abut against the first support and the first fixing frame.

In this implementation, first elasticity main part is used for providing the elastic force for first elastic component, and the connection structure of first support and first rotation arm is stable, accurate for first elastic component both can provide the elastic force, and it can also accurately cooperate with first rotation arm, is favorable to ensureing folding assembly's motion reliability.

In a possible implementation manner, the first bracket includes a first bottom plate and a first mating block protruding from one side of the first bottom plate. The first elastic main body is positioned on one side of the first bottom plate, which is back to the first matching block. The first matching block comprises a top surface, a transition surface and a connecting surface which are sequentially connected, the top surface faces back to the first base plate and is arranged at an interval with the first base plate, the transition surface is an arc surface or a free-form surface, the connecting surface extends towards the direction close to the first base plate in a bending mode, and the connecting surface is an arc surface or a free-form surface. When the first shell and the second shell are in an opening state, the second end of the first rotating arm contacts the top surface or the transition surface; when the first shell and the second shell are in a closed state, the second end of the first rotating arm contacts the connecting surface.

In this implementation, the first elastic body is in a compressed state in the open state by designing the structure of the first fitting block, the fitting structure of the first rotating arm with the first fitting block in the open state and the closed state, so as to provide the elastic force. In some implementations, the first resilient body may also be in a compressed state in the closed state by the structure of the first engagement block and its engagement structure with the first rotation arm.

In a possible implementation manner, the first fixing frame further includes a first accommodating groove and a first communicating hole, and the first communicating hole communicates the first accommodating groove and the first arc-shaped groove. The first bottom plate and the first elastic main body are located in the first accommodating groove, the first elastic piece is in contact with the groove wall of the first accommodating groove, and the first matching block is located at the first communicating hole. The second end of the first rotating arm comprises a first abutting block, and at least part of the first abutting block is located at the first communication port and abuts against the first matching block.

In this implementation, the first rotating arm is installed in the first arc-shaped groove, the first bottom plate and the first elastic main body are installed in the first accommodating groove, the first matching block is matched with the first abutting block at the second end of the first rotating arm at the first communication port, and the first rotating arm, the first elastic piece and the first fixing frame are compactly arranged so as to fully utilize the space of the first fixing frame and provide space utilization.

The wall surface of the first communication opening can be used for limiting the first abutting block so as to prevent the first rotating arm from separating from the first fixing frame.

The first fixing frame can comprise a main body and a matching block, and the matching block is arranged on the main body, so that the slotted hole structure of the first fixing frame is easier to realize. For example, the first arc-shaped groove and the first communication port may be formed by fitting the main body to the fitting block.

In one possible implementation, the middle shaft includes a third arc-shaped groove and a fourth arc-shaped groove, and the third arc-shaped groove and the fourth arc-shaped groove extend to two sides of the middle shaft respectively. The first end of the first rotating arm is an arc-shaped arm and is arranged in the third arc-shaped groove, and the first end of the second rotating arm is an arc-shaped arm and is arranged in the fourth arc-shaped groove.

In this implementation, the first rotating arm and the middle shaft are rotatably connected through the virtual shaft structure, and the second rotating arm and the middle shaft are rotatably connected through the virtual shaft structure, so that the design difficulty of the rotating connection structure of the rotating arm and the middle shaft is reduced, the overall thickness of the folding assembly is reduced, and the light and thin folding assembly is facilitated.

In one possible implementation, the folding assembly further comprises a first transmission arm and a second transmission arm. The first transmission arm comprises a rotating end and a sliding end, the rotating end of the first transmission arm is rotatably connected with the middle shaft, and the sliding end of the first transmission arm is slidably connected with the first fixing frame. The second transmission arm comprises a rotating end and a sliding end, the rotating end of the second transmission arm is rotatably connected with the middle shaft, and the sliding end of the second transmission arm is slidably connected with the second fixing frame.

In the implementation mode, the first transmission arm is rotationally connected with the middle shaft and is in sliding connection with the first fixing frame to form a connecting rod sliding block structure, and the first transmission arm is rotationally connected with the middle shaft and is rotationally connected with the first fixing frame to form a connecting rod structure; the second transmission arm is rotatably connected with the middle shaft and is in sliding connection with the second fixing frame to form a connecting rod sliding block structure, and the second rotating arm is rotatably connected with the middle shaft and is rotatably connected with the second fixing frame to form a connecting rod structure. The folding assembly realizes the connection between the fixing frame and the middle shaft through the connecting rod sliding block structure and the connecting rod structure, the number of the components is small, the matching relation and the matching position are simple, the components are easy to manufacture and assemble, and the mass production is favorably realized. In addition, the middle shaft is linked with the first fixing frame through the first transmission arm and the first rotating arm and linked with the second fixing frame through the second transmission arm and the second rotating arm, so that the folding assembly has better mechanism tensile capacity and mechanism anti-extrusion capacity.

In addition, the folding assembly can realize pulling motion in the fixing frame in the process that the opening state changes to the closing state and pushing motion out of the fixing frame in the process that the closing state changes to the opening state, so that the length and the size of the folding assembly can be kept consistent or relatively close in the motion process, a bending part of the flexible display screen can be better supported, the risk of pulling or extruding the flexible display screen is reduced, and the reliability and the service life of the flexible display screen and the electronic equipment are improved. The length of the folding component refers to the size from the end part of the first fixing frame back to the central axis, passing through the central axis and extending to the end part of the second fixing frame back to the central axis, and the size is a dynamic size and changes along with the movement of the folding component.

Meanwhile, the first rotating arm and the first fixing frame are propped open through the first elastic piece, the second rotating arm and the second fixing frame are propped open through the second elastic piece, and the first elastic piece and the second elastic piece can deform under the action of external force, so that in the moving process of the folding assembly, the moving gap between the first rotating arm and the first fixing frame and the moving gap between the second rotating arm and the second fixing frame can enable the relative movement between the first fixing frame and the second fixing frame to be smoother, and the elastic force of the first elastic piece and the second elastic piece enables the first fixing frame and the second fixing frame to be kept in a propped-open state, so that the bending part of the flexible display screen is better propped, and the reliability of the flexible display screen is ensured.

In one possible implementation, the folding assembly further includes a first damping member, and the first damping member is mounted to the sliding end of the first transmission arm. The first fixing frame further comprises a first sliding groove, a first depressed area and a second depressed area, the first depressed area and the second depressed area are communicated with the first sliding groove, the first depressed area is located on one side, close to the central axis, of the second depressed area, and the first fixing frame further comprises a first ejecting block located between the first depressed area and the second depressed area. The sliding end of the first transmission arm is installed on the first sliding groove, when the first shell and the second shell are in an opening state, the first damping part is clamped into the first recessed area, and when the first shell and the second shell are in a closing state, the first damping part crosses the first ejector block, and part of the first damping part is clamped into the second recessed area.

The folding assembly further comprises a second damping piece, and the second damping piece is installed at the sliding end of the second transmission arm. The second fixing frame further comprises a second sliding groove, a third depressed area and a fourth depressed area, the third depressed area and the fourth depressed area are communicated with the second sliding groove, the third depressed area is located on one side, close to the central axis, of the fourth depressed area, and the second fixing frame further comprises a second ejector block located between the third depressed area and the fourth depressed area. The sliding end of the second transmission arm is installed on the second sliding groove, when the first shell and the second shell are in an open state, the second damping part is partially clamped into the third recessed area, and when the first shell and the second shell are in a closed state, the second damping part passes through the second ejector block and is partially clamped into the fourth recessed area.

In this implementation manner, because the folding assembly is provided with the first damping part and the second damping part, the first damping part is used for providing damping force in the process of relative sliding between the first transmission arm and the first fixing frame, the first fixing frame is used for connecting the first shell of the folding device, the second damping part is used for providing damping force in the process of relative sliding between the second transmission arm and the second fixing frame, the second fixing frame is used for connecting the second shell of the folding device, the first fixing frame drives the first shell to rotate relative to the center shaft, and the second fixing frame drives the second shell to rotate relative to the center shaft, the first damping part and the second damping part provide certain damping force, so that a user can experience a better mechanism operation feeling.

In one possible implementation, the folding assembly further comprises a plurality of synchronizing gears that engage the rotating end of the first drive arm and the rotating end of the second drive arm.

In this implementation, a plurality of synchronizing gear are used for in folding assembly's motion process, make first transmission arm and the relative centraxonial turned angle of second transmission arm keep synchronous to make the turned angle of first mount and second mount keep synchronous, first mount drives first casing and rotates, the second mount drives the second casing and rotates, consequently a plurality of synchronizing gear can make first casing and second casing keep synchronous in folding device's motion process, experience with the use that improves the user.

In a second aspect, the present application provides a folding assembly, which can be applied to a folding device of a foldable electronic device. The electronic equipment comprises a foldable flexible display screen, the folding device is used for bearing the flexible display screen, and the bending part of the flexible display screen corresponds to the folding assembly.

The folding assembly comprises a middle shaft, a first fixing frame, a first rotating arm, a first elastic piece, a second fixing frame, a second rotating arm and a second elastic piece. The first rotating arm comprises a first end and a second end, the first end of the first rotating arm is rotatably connected with the middle shaft, the first fixing frame comprises a first arc-shaped groove, and the second end of the first rotating arm is an arc-shaped arm and is installed in the first arc-shaped groove to be rotatably connected with the first fixing frame. The first elastic piece is arranged on the first fixing frame, one end, close to the middle shaft, of the first elastic piece contacts with the second end of the first rotating arm, and one end, far away from the middle shaft, of the first elastic piece contacts with the first fixing frame. The second rotating arm comprises a first end and a second end, the first end of the second rotating arm is rotatably connected with the middle shaft, the second fixing frame comprises a second arc-shaped groove, and the second end of the second rotating arm is an arc-shaped arm and is arranged in the second arc-shaped groove to be rotatably connected with the second fixing frame. The second elastic piece is arranged on the second fixing frame, one end, close to the middle shaft, of the second elastic piece contacts with the second end of the second rotating arm, and one end, far away from the middle shaft, of the second elastic piece contacts with the second fixing frame. When the folding assembly is in an opening state, the first fixing frame and the second fixing frame are respectively positioned on two sides of the middle shaft, and the first elastic piece and the second elastic piece are in a compression state.

In this application, first mount passes through first rotor arm and rotates and connect the axis, and the second mount passes through second rotor arm and rotates and connect the axis, and first mount and second mount can rotate to the axis relatively to relatively expand to open mode or fold to the closed condition relatively.

The first rotating arm is rotatably connected with the first fixing frame through a virtual shaft structure, and a certain gap is designed in the first fixing frame at the second end of the first rotating arm so as to realize smooth rotating motion. When the folding assembly is in an opening state, the first elastic part is in a compression state, two ends of the first elastic part are respectively contacted with the second ends of the first fixing frame and the first rotating arm, and the elastic force generated by the first elastic part enables the first fixing frame and the first rotating arm to be spread in directions far away from each other so as to absorb a gap between the first fixing frame and the first rotating arm and enable the first fixing frame and the first rotating arm to move in place in the opening state.

The second rotating arm is rotatably connected with the second fixing frame through a virtual shaft structure, and a certain gap is designed in the second fixing frame at the second end of the second rotating arm so as to realize smooth rotating motion. When the folding assembly is in an opening state, the second elastic piece is also in a compression state, two ends of the second elastic piece are respectively in contact with second ends of the second fixing frame and the second rotating arm, and elastic force generated by the second elastic piece enables the second fixing frame and the second rotating arm to be spread in directions far away from each other so as to absorb a gap between the second fixing frame and the second rotating arm and enable the second fixing frame and the second rotating arm to move in place in the opening state.

In this application, because the clearance between first mount and the first rotor arm is absorbed, the clearance between second mount and the second rotor arm is absorbed, first mount and second mount expand to keeping away from centraxonial direction and target in place, consequently folding assembly can prop the portion of bending of flat flexible display screen better, avoids the problem that the flexible display screen leads to middle hunch-up because long-term buckling to improve the roughness and the reliability of flexible display screen.

In a possible implementation manner, when the folding assembly is in the closed state, the first fixing frame and the second fixing frame are located on the same side of the central axis and are arranged oppositely, and the first elastic element and the second elastic element are in the compressed state.

In this implementation, when the folding assembly is in the closed state, the first elastic element and the second elastic element are in the compressed state, and the elastic force generated by the first elastic element and the second elastic element can also achieve the purpose of absorbing the movement gap, so that the flexible display screen is expanded by the folding device, and is not easy to generate folds or arches, thereby having higher reliability.

The state of the first elastic element and the second elastic element may change during the movement of the folding assembly, for example, between a compressed state and a natural state, or a degree of compression may change, which is not strictly limited in this application. The degree of compression of the first elastic member and the second elastic member in the open state and the closed state may be the same or different, and the present application is not limited thereto. For example, in other implementations, the first and second elastic members may be in a natural state when the folding assembly is in the closed state.

In a possible implementation manner, the first bracket includes a first bottom plate and a first mating block protruding from one side of the first bottom plate. The first elastic main body is positioned on one side of the first bottom plate, which is back to the first matching block. The first matching block comprises a top surface, a transition surface and a connecting surface which are sequentially connected, the top surface faces back to the first base plate and is arranged at an interval with the first base plate, the transition surface is an arc surface or a free-form surface, the connecting surface extends towards the direction close to the first base plate in a bending mode, and the connecting surface is an arc surface or a free-form surface. When the folding assembly is in the open state, the second end of the first rotating arm contacts the top surface or the transition surface; the second end of the first rotating arm contacts the connecting surface when the folding assembly is in the closed state.

In this implementation, the first elastic body is in a compressed state in the open state by designing the structure of the first engaging block, the engaging structure of the first rotating arm with the first engaging block in the open state and the closed state, so as to provide the elastic force. In some implementations, the first resilient body may also be in a compressed state in the closed state by the structure of the first engagement block and its engagement structure with the first rotation arm.

In a possible implementation manner, the first fixing frame further includes a first accommodating groove and a first communicating hole, and the first communicating hole communicates the first accommodating groove and the first arc-shaped groove. The first bottom plate and the first elastic main body are positioned in the first accommodating groove, the first elastic piece contacts with the groove wall of the first accommodating groove, and the first matching block is positioned at the first communication port. The second end of the first rotating arm comprises a first abutting block, and at least part of the first abutting block is located at the first communication port and abuts against the first matching block.

The wall surface of the first communication port can be used for limiting the first abutting block so as to prevent the first rotating arm from separating from the first fixing frame.

In this implementation, realize rotating through virtual axle construction between first rotor arm and the axis and be connected, realize rotating through virtual axle construction between second rotor arm and the axis and be connected, be favorable to reducing rotor arm and centraxonial rotation connection structure's the design degree of difficulty, and can reduce folding assembly's whole thickness, be favorable to folding assembly's frivolousness.

In addition, folding assembly can realize pulling the motion in the mount of the in-process that open mode changes to closed mode and folding assembly at the mount extrapolation motion of the in-process that closed mode changes to open mode, consequently folding assembly's length dimension can keep unanimous or comparatively close in the motion process to can support the portion of bending of flexible display screen better, reduce the risk of dragging or extruding flexible display screen, improve the reliability and the life of flexible display screen and electronic equipment. The length of the folding component refers to the size of the end part of the first fixing frame, which is back to the central axis, extends to the end part of the second fixing frame, which is back to the central axis, passes through the central axis, and the size is dynamic and changes along with the movement of the folding component.

In a possible implementation manner, the folding assembly further includes a first damping member, and the first damping member is mounted at the sliding end of the first transmission arm. The first fixing frame further comprises a first sliding groove, a first depressed area and a second depressed area, the first depressed area is communicated with the first sliding groove, the first depressed area is located on one side, close to the center shaft, of the second depressed area, and the first fixing frame further comprises a first ejector block located between the first depressed area and the second depressed area. The sliding end of the first transmission arm is installed on the first sliding groove, when the folding assembly is in an opening state, the first damping part is partially clamped into the first recessed area, and when the folding assembly is in a closing state, the first damping part crosses the first ejector block and is partially clamped into the second recessed area.

The folding assembly further comprises a second damping piece, and the second damping piece is installed at the sliding end of the second transmission arm. The second fixing frame further comprises a second sliding groove, a third depressed area and a fourth depressed area, the third depressed area and the fourth depressed area are communicated with the second sliding groove, the third depressed area is located on one side, close to the central axis, of the fourth depressed area, and the second fixing frame further comprises a second ejector block located between the third depressed area and the fourth depressed area. The sliding end of the second transmission arm is installed on the second sliding groove, when the folding assembly is in an opening state, the second damping part is partially clamped into the third recessed area, and when the folding assembly is in a closing state, the second damping part passes through the second ejector block and is partially clamped into the fourth recessed area.

In this implementation manner, because the folding assembly is provided with the first damping member and the second damping member, the first damping member is used for providing a damping force in the process of relative sliding between the first transmission arm and the first fixing frame, the first fixing frame is used for connecting the first shell of the folding device, the second damping member is used for providing a damping force in the process of relative sliding between the second transmission arm and the second fixing frame, the second fixing frame is used for connecting the second shell of the folding device, in the process of driving the first shell to rotate relative to the middle shaft by the first fixing frame and driving the second shell to rotate relative to the middle shaft by the second fixing frame, the first damping member and the second damping member provide a certain damping force, so that a user can experience a better mechanism operation feeling.

In a third aspect, the present application further provides a folding apparatus, which includes a first housing, a second housing, and any one of the folding assemblies, where a first fixing frame of the folding assembly is fixedly connected to the first housing, and a second fixing frame of the folding assembly is fixedly connected to the second housing.

In this application, folding assembly passes through the motion orbit of first mount of first transmission arm and first swivel arm joint control, pass through the motion orbit of second mount and second casing of second transmission arm and second swivel arm joint control, thereby can make first mount drive first casing and move to being close to centraxonial direction at the in-process that first casing and second casing are folding relatively, the second mount drives the second casing and moves to being close to centraxonial direction, at the in-process that first casing and second casing expand relatively, make first mount drive first casing and move to keeping away from centraxonial direction, the second mount drives the second casing and moves to keeping away from centraxonial direction. That is, the folding device can realize the pulling motion in the casing of the in-process that the flat-out state changes to the closed state and the pushing motion in the casing of the in-process that the closed state changes to the flat-out state, make the folding device expand or folding in-process, can realize with the flexible display screen in the deformation motion of neutral plane or being close to the neutral plane, thereby reduce the risk of dragging or extrudeing the flexible display screen, with the protection flexible display screen, improve the reliability of flexible display screen, make flexible display screen and electronic equipment have longer life.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device in an open state according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the electronic device shown in FIG. 1 in an intermediate state;

FIG. 3 is a schematic structural diagram of the electronic device shown in FIG. 1 in a closed state;

FIG. 4 is a schematic view of the folding apparatus shown in FIG. 1;

FIG. 5 is a partially exploded schematic view of the folding assembly shown in FIG. 4;

FIG. 6 is a partially exploded schematic view of the folding assembly shown in FIG. 5;

FIG. 7 is a schematic view of the folding assembly of FIG. 6 at another angle;

FIG. 8 is an exploded view of the first coupling assembly of FIG. 6;

FIG. 9 is a schematic view of the first connector assembly of FIG. 8 at another angle;

FIG. 10 is a schematic view of a portion of the first and second holders shown in FIG. 8;

FIG. 11 is an exploded view of the first resilient member shown in FIG. 8;

FIG. 12 is a schematic view of a portion of the folding assembly shown in FIG. 5;

FIG. 13 is a schematic view of a portion of the folding assembly shown in FIG. 12;

FIG. 14 is a schematic view of the folding assembly of FIG. 12 at another angle;

FIG. 15 is a schematic view of a portion of the folding assembly shown in FIG. 14;

FIG. 16 is a schematic view of the folding assembly of FIG. 15 in a closed position;

FIG. 17 is a schematic view of the folding assembly of FIG. 16 at another angle;

figure 18 isbase:Sub>A schematic cross-sectional view of the folding assembly of figure 12 taken along linebase:Sub>A-base:Sub>A;

FIG. 19 is a cross-sectional view of the folding assembly of FIG. 12 taken along line B-B;

FIG. 20 is a schematic view of the structure of FIG. 18 in a closed position;

FIG. 21 is a schematic view of the structure of FIG. 19 in a closed position;

FIG. 22 is a schematic structural view of the folding assembly shown in FIG. 5;

FIG. 23 is a schematic view of the folding assembly of FIG. 22 at another angle;

figure 24 is a schematic view of the folding assembly of figure 22 in a closed position.

Detailed Description

The following embodiments of the present application will be described with reference to the drawings.

The embodiment of the application provides a folding assembly, a folding device and electronic equipment, the electronic equipment includes the folding device and is fixed in the flexible display screen of folding device, and the folding device includes first casing, second casing and connects the folding assembly between first casing and second casing. The folding device can be unfolded to an open state, also can be folded to a closed state, and also can be in an intermediate state between the open state and the closed state. The flexible display screen is unfolded or folded along with the folding device. Electronic equipment is through optimizing folding assembly for the portion of bending of flexible display screen can keep the roughness of preferred in the open mode, avoids taking place to arch the scheduling problem, in order to improve the reliability that improves flexible display screen, makes flexible display screen and electronic equipment have longer life.

Referring to fig. 1 to fig. 3 in combination, fig. 1 is a schematic structural diagram of an electronic device 100 in an open state according to an embodiment of the present disclosure, fig. 2 is a schematic structural diagram of the electronic device 100 in an intermediate state shown in fig. 1, and fig. 3 is a schematic structural diagram of the electronic device 100 in a closed state shown in fig. 1. The electronic device 100 may be a mobile phone, a tablet computer, a notebook computer, a wearable device, or other electronic products. The present embodiment is described by taking the electronic device 100 as a mobile phone as an example.

The electronic device 100 comprises a folding apparatus 10 and a flexible display 20. The folding device 10 is used to carry a flexible display screen 20. The folding device 10 includes a first housing 1, a second housing 2, and a folding assembly 3, wherein the folding assembly 3 connects the first housing 1 and the second housing 2. By the movement of the folding assembly 3, the first casing 1 and the second casing 2 can be relatively unfolded to an open state or relatively folded to a closed state. The first housing 1 and the second housing 2 are relatively unfolded to an opened state, which corresponds to the opened state of the electronic device 100, the opened state of the folding device 10, and the opened state of the folding assembly 3. The first casing 1 and the second casing 2 are folded relatively to a closed state, corresponding to the closed state of the electronic device 100, the closed state of the folding device 10 and the closed state of the folding assembly 3.

As shown in fig. 1, the first casing 1 and the second casing 2 can be relatively unfolded to an open state, so that the electronic device 100 is in the open state. For example, the first housing 1 and the second housing 2 may be substantially 180 ° (some deviation, such as 165 °, 177 °, or 185 °, is also allowed) when they are in the open state. As shown in fig. 2, the first casing 1 and the second casing 2 can be relatively rotated (unfolded or folded) to an intermediate state, so that the electronic apparatus 100 is in the intermediate state. As shown in fig. 3, the first casing 1 and the second casing 2 can be folded relatively to a closed state, so that the electronic device 100 is in the closed state. Illustratively, when the first casing 1 and the second casing 2 are in the closed state, they can be completely folded to be parallel to each other (a slight deviation is also allowed). The intermediate state shown in fig. 2 may be any state between the open state and the closed state. Therefore, the electronic device 100 can be switched between the open state and the closed state by the movement of the folding member 3.

In some embodiments, the flexible display screen 20 is used to display images. The flexible display panel 20 may be an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode) display panel, an AMOLED (active-matrix organic light-emitting diode) display panel, a mini-led (mini-organic light-emitting diode) display panel, a micro-led (micro-organic light-emitting diode) display panel, a quantum dot light-emitting diode (QLED) display panel, or the like.

The flexible display 20 includes a first non-bending portion 201, a bending portion 202, and a second non-bending portion 203, which are sequentially arranged. The flexible display 20 is fixed to the folding device 10. For example, the flexible display 20 may be adhered to the folding device 10 by a glue layer. The first non-bending portion 201 of the flexible display screen 20 is fixed to the first housing 1, the second non-bending portion 203 is fixed to the second housing 2, and the bending portion 202 is arranged corresponding to the folding assembly 3. During the unfolding or folding process of the folding device 10, that is, during the relative unfolding or relative folding process of the first casing 1 and the second casing 2, the bending portion 202 is deformed. As shown in fig. 1, when the first housing 1 and the second housing 2 are in the open state, the flexible display 20 is in the flat state; as shown in fig. 2, when the first housing 1 and the second housing 2 are in the intermediate state, the flexible display 20 is in the intermediate state between the flat state and the closed state; as shown in fig. 3, when the first casing 1 and the second casing 2 are in the closed state, the flexible display 20 is in the closed configuration. When the electronic device 100 is in the closed state, the flexible display 20 may be located outside the folding apparatus 10, and the flexible display 20 may be substantially U-shaped.

In this embodiment, the flexible display 20 can be unfolded or folded with the folding device 10. When the electronic device 100 is in the open state, the flexible display screen 20 is in the flat state and can display in a full screen mode, so that the electronic device 100 has a larger display area to improve the viewing experience of a user. When the electronic apparatus 100 is in the closed state, the electronic apparatus 100 has a small planar size (has a small width dimension), which is convenient for the user to carry and store.

It is understood that, in the present embodiment, the example "the rotation center of the electronic device 100 is parallel to the width direction of the electronic device 100" is taken as an example, in this case, the electronic device 100 can rotate left and right, and the expansion or folding of the electronic device 100 affects the width dimension of the electronic device 100. In other embodiments, the rotation center of the electronic device 100 may also be parallel to the length direction of the electronic device 100, in which case, the electronic device 100 can rotate up and down, and the expansion or folding of the electronic device 100 affects the length dimension of the electronic device 100.

Referring to fig. 4 to 7, fig. 4 is a schematic structural view of the folding apparatus 10 shown in fig. 1, fig. 5 is a schematic partial exploded structural view of the folding assembly 3 shown in fig. 4, fig. 6 is a schematic partial exploded structural view of the folding assembly 3 shown in fig. 5, and fig. 7 is a schematic structural view of the folding assembly 3 shown in fig. 6 at another angle. In the drawings, the overall structure of the first housing 1 and the second housing 2 is not illustrated in the present application, so as to simplify the drawings and more clearly illustrate the main structure of the folding device 10. The first housing 1 and the second housing 2 may be integrally formed structural members, or may be a composite structural member formed by assembling a plurality of structural members. Wherein the folding assembly 3 shown in fig. 4 is shown in a view that is inverted with respect to the folding assembly 3 shown in fig. 1.

In some embodiments, the folding assembly 3 includes a central shaft 31, a first connecting assembly 32, a second connecting assembly 33, a first shielding plate 34, and a second shielding plate 35. Illustratively, the middle axle 31 is located between the first housing 1 and the second housing 2. The middle shaft 31 includes an inner shell 311 and an outer shell 312, the inner shell 311 and the outer shell 312 are fixed to each other to form a plurality of installation spaces, such as arc-shaped slots, rotation shaft holes, communication holes, etc., and other components can be installed in the installation spaces to movably or fixedly connect the middle shaft 31.

The first connecting assembly 32 and the second connecting assembly 33 are connected to the first casing 1, the middle shaft 31 and the second casing 2, and the first casing 1 and the second casing 2 can rotate relative to the middle shaft 31 through the movement of the first connecting assembly 32 and the second connecting assembly 33. The first connecting assembly 32 and the second connecting assembly 33 are spaced apart from each other in the axial direction of the middle shaft 31, and may be end connecting assemblies, for example, connected to the top and the bottom of the middle shaft 31, respectively. In the present embodiment, the first connecting assembly 32 and the second connecting assembly 33 cooperatively move, so that the first casing 1 and the second casing 2 can move more smoothly and reliably when rotating relative to the central shaft 31.

The first connecting assembly 32 and the second connecting assembly 33 may have the same structure, a mirror symmetry structure, a central symmetry structure, or other different structures, and the first connecting assembly 32 and the second connecting assembly 33 are taken as examples in the embodiment of the present application, and the first connecting assembly 32 is mainly described below. In other embodiments, the folding assembly 3 may further include a middle connection assembly, which may be connected to the middle of the middle shaft 31 and connect the first housing 1 and the second housing 2 to increase the reliability of the folding device 10. The structure of the middle connecting assembly may be the same as, partially the same as, or completely different from that of the first connecting assembly 32, and this is not a strict limitation in the present embodiment.

Referring to fig. 8 and 9 in combination, fig. 8 is an exploded view of the first connecting element 32 shown in fig. 6, and fig. 9 is a view of the first connecting element 32 shown in fig. 8 at another angle.

In some embodiments, the first connecting assembly 32 includes a first fixing frame 321, a second fixing frame 322, a first rotating arm 323, a first transmission arm 324, a second rotating arm 325, a second transmission arm 326, a first damping member 327, a second damping member 328, a synchronizing gear 329, a first elastic member 36, a second elastic member 37, a third rotating arm 38, and a fourth rotating arm 39.

For example, please refer to fig. 8 and 10 in combination, fig. 10 is a schematic view of a portion of the first fixing frame 321 and the second fixing frame 322 shown in fig. 8. The first fixing frame 321 includes a first arc-shaped groove 321a, a first receiving groove 321b, and a first communication hole 321c. The first communication port 321c communicates the first receiving groove 321b and the first arc-shaped groove 321a. One end of the first arc-shaped groove 321a facing away from the first communication port 321c is communicated to the outside of the first fixing frame 321. The first arc-shaped slots 321a, the first receiving slots 321b and the first communication ports 321c are arranged in groups, and one or more groups of the structures may be arranged on the first fixing frame 321, for example, the structures shown in fig. 8 and 9 include two groups of the structures. The first fixing frame 321 may include a main body and a matching block, and the matching block is mounted on the main body, so that the slot structure of the first fixing frame 321 is easier to implement. For example, the first arc-shaped groove 321a and the first communication port 321c may be formed by fitting the main body to the fitting block.

The second fixing frame 322 includes a second arc-shaped groove 322a, a second receiving groove 322b and a second communicating opening 322c. The second communicating opening 322c communicates the second receiving groove 322b and the second arc-shaped groove 322a. One end of the second arc-shaped groove 322a, which is back to the second communicating opening 322c, is communicated to the outside of the second fixing frame 322. The second arc-shaped slots 322a, the second receiving slots 322b and the second communication ports 322c are disposed in groups, and the second fixing frame 322 may be disposed with one or more groups of the above structures. The second fixing frame 322 may include a main body and a matching block, and the matching block is mounted on the main body, so that the slot structure of the second fixing frame 322 is easier to implement. For example, the second arc-shaped groove 322a and the second communication port 322c may be configured by fitting the main body to the fitting block.

As shown in fig. 9, the first fixing frame 321 further includes a first sliding groove 321d, and a first concave area 321e and a second concave area 321f communicating with the first sliding groove 321d, and the first fixing frame 321 further includes a first top block 321g located between the first concave area 321e and the second concave area 321f. The second fixing frame 322 further includes a second sliding chute 322d, and a third recessed area 322e and a fourth recessed area 322f communicating with the second sliding chute 322d, and the second fixing frame 322 further includes a second top block 322g located between the third recessed area 322e and the fourth recessed area 322f.

Illustratively, as shown in fig. 8 and 9, the first rotation arm 323 includes a first end 323a and a second end 323b. The first end 323a of the first rotation arm 323 may be an arc-shaped arm, and the second end 323b of the first rotation arm 323 may be an arc-shaped arm. The two arc-shaped arms of the first rotating arm 323 can be directly connected or connected through an intermediate structure, so as to meet the connection requirement of the first rotating arm 323. The first rotating arm 323 may be an integrally formed structural member to obtain high structural strength. In other embodiments, the first rotation arm 323 may be assembled (e.g., welded, bonded, snap-fit, etc.) to form a unitary structure.

The second end 323b of the first rotating arm 323 may include a first arc-shaped body 3231 and a first abutting block 3232. The first arc body 3231 connects the first end 323a of the first rotating arm 323. The first abutment block 3232 may be located at an end of the first arc-shaped body 3231 distal from the first end 323a of the first rotation arm 323. The first abutting block 3232 can be protruded from an outer arc surface of the first arc-shaped body 3231. The first arc-shaped body 3231 can have a through hole or a groove formed in the middle or the periphery thereof while ensuring sufficient structural strength, and the through hole or the groove is staggered from the first abutting block 3232, so as to reduce the weight of the first rotating arm 323.

It can be understood that the first end 323a and the second end 323b of the first rotating arm 323 are arc-shaped arms, which means that the main structure thereof is an arc-shaped arm structure (e.g., the first arc-shaped body 3231) to meet the connection requirement, and is not limited to that the first end 323a and the second end 323b of the first rotating arm 323 are only provided with the arc-shaped arm structure, and the first end 323a and the second end 323b of the first rotating arm 323 may further include the first abutting block 3232, the through hole, and the like as described above. Of course, in some embodiments, the first end 323a and the second end 323b of the first rotating arm 323 may only include the arc-shaped arm structure, which is not strictly limited in the embodiments of the present application.

Here, the number of the first rotation arms 323 may be one or more, for example, two in the illustrated embodiment.

Illustratively, as shown in FIG. 8, the second pivot arm 325 includes a first end 325a and a second end 325b. The first end 325a of the second rotating arm 325 may be an arc-shaped arm and the second end 325b of the second rotating arm 325 may be an arc-shaped arm. Wherein, the two arc arms of the second rotating arm 325 can be directly connected or connected through an intermediate structure to meet the connection requirement of the second rotating arm 325. The second rotating arm 325 may be an integrally formed structural member, so as to obtain higher structural strength. In other embodiments, the second rotating arm 325 may be assembled (e.g., welded, bonded, snap-fit, etc.) to form a unitary structure.

The second end 325b of the second rotating arm 325 may include a second arc-shaped body 3251 and a second abutting block 3252. The second curved body 3251 is coupled to the first end 325a of the second rotating arm 325. The second buttressing block 3252 can be located at an end of the second arcuate body 3251 distal from the first end 325a of the second rotating arm 325. The second abutting block 3252 can be protruded from an outer arc surface of the second arc-shaped body 3251. The second arc-shaped body 3251 can have a through hole or a groove formed in the middle or the periphery thereof while ensuring sufficient structural strength, and the through hole or the groove is staggered from the second abutting block 3252, so as to reduce the weight of the second rotating arm 325.

It can be understood that the first end 325a and the second end 325b of the second rotating arm 325 are arc-shaped arms, which means that the main structure thereof is an arc-shaped arm structure (e.g. the second arc-shaped body 3251) to meet the connection requirement, and it is not limited that the first end 325a and the second end 325b of the second rotating arm 325 are only provided with the arc-shaped arm structure, and the first end 325a and the second end 325b of the second rotating arm 325 may further include the second abutting block 3252, the through hole, and the like as described above. Of course, in some embodiments, the first end 325a and the second end 325b of the second rotating arm 325 may only include an arc-shaped arm structure, which is not strictly limited in the embodiments of the present application.

Wherein the number of second rotating arms 325 may be one or more, such as two in the illustrated embodiment.

Illustratively, as shown in fig. 9, the first transmission arm 324 includes a rotating end 324a and a sliding end 324b. The rotating end 324a of the first transmission arm 324 may include a rotating shaft and a gear, for example, the rotating end 324a of the first transmission arm 324 may be a gear shaft structure. Wherein, the pivot can be with gear integrated into one piece, also can realize the cooperation through the equipment. The sliding end 324b of the first drive arm 324 may include a first mounting groove 3241.

Illustratively, the second actuator arm 326 includes a rotating end 326a and a sliding end 326b. The rotating end 326a of the second transmission arm 326 may include a rotating shaft and a gear, for example, the rotating end 326a of the second transmission arm 326 may be a gear shaft structure. Wherein, the pivot can be with gear integrated into one piece, also can realize the cooperation through the equipment. The sliding end 326b of the second transmission arm 326 may include a second mounting groove 3261.

For example, as shown in fig. 9, the synchronizing gear 329 may include a rotating shaft and a gear, and may be, for example, a gear shaft structure. Wherein, the pivot can be with gear integrated into one piece, also can realize the cooperation through the equipment.

Referring to fig. 11, fig. 11 is an exploded view of the first elastic element 36 shown in fig. 8.

In some embodiments, the first elastic member 36 includes a first elastic body 361 and a first support 362, wherein the first elastic body 361 is made of an elastic material, and the first support 362 is made of a hard material. For example, the first elastic body 361 may have a spring structure. In other embodiments, the first elastic body 361 may also be an elastic block made of elastic silicone or elastic rubber. The first support 362 may be made of metal, hard plastic, ceramic, etc.

The first bracket 362 includes a first base plate 3621 and a first engaging block 3622 protruding from one side of the first base plate 3621. The first mating block 3622 includes a top surface 3622a, a transition surface 3622b and a connecting surface 3622c that are connected in sequence, the top surface 3622a is back to the first bottom plate 3621 and is spaced from the first bottom plate 3621, the transition surface 3622b is an arc surface or a free-form surface, the connecting surface 3622c is bent and extended in a direction close to the first bottom plate 3621, and the connecting surface 3622c is an arc surface or a free-form surface. The first elastic body 361 is located on a side of the first bottom plate 3621 facing away from the first mating block 3622. The first bracket 362 may further include a first guiding pillar 3623, the first guiding pillar 3623 is protruded on a side of the first bottom plate 3621 opposite to the first matching block 3622, and the first elastic body 361 may be sleeved on the first guiding pillar 3623.

The number of the first elastic members 36 may be one or more, for example, two in the illustrated embodiment.

For example, as shown in fig. 8, the second elastic member 37 may have the same structure as the first elastic member 36, for example, the second elastic member 37 may include a second elastic body 371 and a second support 372, and the detailed structure of the second elastic member 37 is described in reference to the related contents of the first elastic member 36.

Illustratively, as shown in fig. 8, the third rotating arm 38 includes a first end 381 and a second end 382, the first end 381 of the third rotating arm 38 may have a rotating shaft hole or be provided with a rotating shaft, and the second end 382 of the third rotating arm 38 may be an arc-shaped arm. The fourth rotating arm 39 includes a first end 391 and a second end 392, the first end 391 of the fourth rotating arm 39 may have a pivot hole or be provided with a pivot, and the second end 392 of the fourth rotating arm 39 may be an arc-shaped arm.

Referring to fig. 12 to 17 in combination, fig. 12 is a partial structural schematic view of the folding assembly 3 shown in fig. 5, fig. 13 is a partial structural schematic view of the folding assembly 3 shown in fig. 12, fig. 14 is a structural schematic view of the folding assembly 3 shown in fig. 12 at another angle, fig. 15 is a partial structural schematic view of the folding assembly 3 shown in fig. 14, fig. 16 is a structural schematic view of the folding assembly 3 shown in fig. 15 in a closed state, and fig. 17 is a structural schematic view of the folding assembly 3 shown in fig. 16 at another angle. Wherein the folding assembly 3 shown in figures 12 to 15 is in an open state.

In some embodiments, the first end 323a of the first rotating arm 323 is rotatably connected to the central shaft 31, and the second end 323b of the first rotating arm 323 is rotatably connected to the first fixing frame 321. The rotating end 324a of the first transmission arm 324 is rotatably connected to the middle shaft 31, and the sliding end 324b of the first transmission arm 324 is slidably connected to the first fixing frame 321. The first end 325a of the second rotating arm 325 is rotatably connected to the middle shaft 31, and the second end 325b of the second rotating arm 325 is rotatably connected to the second fixing frame 322. The rotating end 326a of the second transmission arm 326 is rotatably connected to the central shaft 31, and the sliding end 326b of the second transmission arm 326 is slidably connected to the second fixing frame 322.

In this embodiment, the first fixing frame 321 is rotatably connected to the central shaft 31 through the first rotating arm 323, the second fixing frame 322 is rotatably connected to the central shaft 31 through the second rotating arm 325, and the first fixing frame 321 and the second fixing frame 322 can rotate relative to the central shaft 31 to be relatively unfolded to an open state or relatively folded to a closed state. As shown in fig. 12 to 15, when the folding assembly 3 is in the unfolded state, the first fixing frame 321 and the second fixing frame 322 are respectively located at two sides of the central shaft 31, and both of them may be in a flat state. As shown in fig. 16 and 17, when the folding assembly 3 is in the closed state, the first fixing frame 321 and the second fixing frame 322 are located on the same side of the central shaft 31, and both can be in the folded configuration.

The first transmission arm 324 is rotatably connected with the middle shaft 31 and slidably connected with the first fixing frame 321 to form a connecting rod slider structure, and the first transmission arm 323 is rotatably connected with the middle shaft 31 and rotatably connected with the first fixing frame 321 to form a connecting rod structure; the second transmission arm 326 is rotatably connected to the middle shaft 31 and slidably connected to the second fixing frame 322 to form a link slider structure, and the second rotation arm 325 is rotatably connected to the middle shaft 31 and rotatably connected to the second fixing frame 322 to form a link structure. The folding component 3 realizes the connection between the fixed brackets (321, 322) and the middle shaft 31 through the connecting rod sliding block structure and the connecting rod structure, the number of the components is small, the matching relation and the matching position are simple, the components are easy to manufacture and assemble, and the mass production is facilitated. Moreover, since the middle shaft 31 is linked with the first fixing frame 321 through the first transmission arm 324 and the first rotating arm 323, and is linked with the second fixing frame 322 through the second transmission arm 326 and the second rotating arm 325, the folding assembly 3 has better mechanism tensile strength and mechanism anti-extrusion capability.

Illustratively, as shown in fig. 12 to 15, when the folding assembly 3 is in the unfolded state, the first fixing frame 321 and the second fixing frame 322 are spaced apart from the central axis 31, as shown in fig. 16 and 17, the first fixing frame 321 and the second fixing frame 322 are close to the central axis 31, and a part of the structure of the first fixing frame 321 and the second fixing frame 322 is embedded in the central axis 31. Therefore, the folding assembly 3 controls the movement track of the first fixing frame 321 through the first transmission arm 324 and the first rotation arm 323, and controls the movement track of the second fixing frame 322 through the second transmission arm 326 and the second rotation arm 325, so that the inward pulling movement of the fixing frame in the process of changing the opening state to the closing state and the outward pushing movement of the fixing frame in the process of changing the folding assembly 3 from the closing state to the opening state can be realized, and therefore, the length and the size of the folding assembly 3 can be kept consistent or relatively close in the movement process, so that the bending portion 202 (see fig. 1) of the flexible display screen 20 can be better supported, the risk of pulling or squeezing the flexible display screen 20 is reduced, and the reliability and the service life of the flexible display screen 20 and the electronic device 100 are improved. The length of the folding assembly 3 is a dimension extending from the end of the first fixing frame 321 opposite to the central axis 31 to the end of the second fixing frame 322 opposite to the central axis 31 through the central axis 31, and the dimension is a dynamic dimension and changes with the movement of the folding assembly 3.

In the present application, since the first fixing frame 321 is fixedly connected to the first casing 1, and the second fixing frame 322 is fixedly connected to the second casing 2, the folding device 10 can control the movement tracks of the first fixing frame 321 and the first casing 1 through the first transmission arm 324 and the first rotation arm 323, and control the movement tracks of the second fixing frame 322 and the second casing 2 through the second transmission arm 326 and the second rotation arm 325, so that in the process of relatively folding the first casing 1 and the second casing 2, the first fixing frame 321 drives the first casing 1 to move in the direction close to the central axis 31, the second fixing frame 322 drives the second casing 2 to move in the direction close to the central axis 31, and in the process of relatively unfolding the first casing 1 and the second casing 2, the first fixing frame 321 drives the first casing 1 to move in the direction far from the central axis 31, and the second fixing frame 322 drives the second casing 2 to move in the direction far from the central axis 31. That is, the folding device 10 can realize the in-casing pulling motion in the process of changing from the flat state to the closed state and the in-casing pushing motion in the process of changing from the closed state to the flat state, so that the folding device 10 can realize the deformation motion of the flexible display screen 20 in the neutral plane or close to the neutral plane in the process of unfolding or folding, thereby reducing the risk of pulling or squeezing the flexible display screen 20, protecting the flexible display screen 20, improving the reliability of the flexible display screen 20, and enabling the flexible display screen 20 and the electronic device 100 to have longer service life.

It is understood that, in other embodiments, the folding assembly 3 may also adopt a linkage structure and other connection structures to cooperate to implement the movement process of the first fixing frame 321 and the second fixing frame 322 rotating relative to the central shaft 31, which is not strictly limited in this embodiment of the present invention.

Referring to fig. 18 and 19 in combination, fig. 18 isbase:Sub>A cross-sectional view of the folding assembly 3 of fig. 12 taken alongbase:Sub>A-base:Sub>A, and fig. 19 isbase:Sub>A cross-sectional view of the folding assembly 3 of fig. 12 taken along B-B.

In some embodiments, the central axle 31 includes a third arc-shaped slot 313 and a fourth arc-shaped slot 314, and the third arc-shaped slot 313 and the fourth arc-shaped slot 314 extend to both sides of the central axle 31, respectively. The third arc-shaped slot 313 and the fourth arc-shaped slot 314 can be formed by the inner shell 311 and the outer shell 312 of the middle shaft 31 together, so as to reduce the processing difficulty and facilitate the connection of other components with the middle shaft 31.

The first end 323a of the first rotating arm 323 is mounted in the third arc-shaped groove 313 to be rotatably connected with the middle shaft 31 through a virtual shaft structure; the second end 323b of the first rotating arm 323 is mounted to the first arc-shaped slot 321a to be rotatably connected to the first fixing frame 321 through a virtual shaft structure. A first end 325a of the second rotating arm 325 is mounted to the fourth arc-shaped slot 314 to be rotatably connected with the middle shaft 31 through a virtual shaft structure; the second end 325b of the second rotating arm 325 is mounted to the second arc-shaped slot 322a to be rotatably connected to the second fixing frame 322 through a virtual shaft structure. The two components are rotationally connected through a virtual shaft structure, namely that the two components do not rotate mutually through a solid rotating shaft, but rotate relatively around a rotating center through the structures of the arc-shaped arm and the arc-shaped groove.

In this embodiment, the first rotating arm 323 is rotatably connected to the middle shaft 31 through the virtual shaft structure, and the second rotating arm 325 is rotatably connected to the middle shaft 31 through the virtual shaft structure, which is beneficial to reducing the design difficulty of the rotating connection structure between the rotating arm and the middle shaft 31, reducing the overall thickness of the folding assembly 3, and facilitating the light and thin of the folding assembly 3.

In addition, the first rotating arm 323 is rotatably connected with the first fixing frame 321 through the virtual shaft structure, which is beneficial to reducing the thickness of the first fixing frame 321, and the second rotating arm 325 is rotatably connected with the second fixing frame 322 through the virtual shaft structure, which is beneficial to reducing the thickness of the second fixing frame 322, so that the requirement of the folding assembly 3 on the installation space is low, the difficulty of assembling the folding assembly 3 with the first housing 1 and the second housing 2 is small, and the overall thickness of the folding device 10 and the electronic device 100 is beneficial to being thinned.

Referring to fig. 12, 18 and 19, the first elastic element 36 is mounted on the first fixing frame 321, one end of the first elastic element 36 close to the middle shaft 31 contacts the second end 323b of the first rotating arm 323, and one end of the first elastic element 36 far from the middle shaft 31 contacts the first fixing frame 321. The second elastic element 37 is mounted on the second fixing frame 322, one end of the second elastic element 37 close to the central shaft 31 contacts the second end 325b of the second rotating arm 325, and one end of the second elastic element 37 far from the central shaft 31 contacts the second fixing frame 322. When the folding assembly 3 is in the unfolded state, the first fixing frame 321 and the second fixing frame 322 are respectively located at two sides of the central shaft 31, and the first elastic element 36 and the second elastic element 37 are in a compressed state.

In the present embodiment, the first rotating arm 323 and the first fixing frame 321 are rotatably connected by a virtual shaft structure, and a certain gap is designed in the first fixing frame 321 at the second end 323b of the first rotating arm 323, so as to achieve a smooth rotating motion. When the folding assembly 3 is in the unfolded state, the first elastic element 36 is in a compressed state, two ends of the first elastic element 36 respectively contact the first fixing frame 321 and the second end 323b of the first rotating arm 323, and the elastic force generated by the first elastic element 36 causes the first fixing frame 321 and the first rotating arm 323 to be spread apart in a direction away from each other to absorb a gap between the first fixing frame 321 and the first rotating arm 323, so that the first fixing frame 321 and the first rotating arm 323 can move to the right position in the unfolded state. The second rotating arm 325 is rotatably connected to the second fixing frame 322 via a virtual shaft structure, and a second end 325b of the second rotating arm 325 is provided with a certain gap in the second fixing frame 322 to realize smooth rotating motion. When the folding assembly 3 is in the open state, the second elastic element 37 is also in the compressed state, two ends of the second elastic element 37 respectively contact the second ends 325b of the second fixed frame 322 and the second rotating arm 325, and the elastic force generated by the second elastic element 37 causes the second fixed frame 322 and the second rotating arm 325 to expand in the direction away from each other so as to absorb the gap between the second fixed frame 322 and the second rotating arm 325, so that the second fixed frame 322 and the second rotating arm 325 can move to the right position in the open state.

In this embodiment, since the gap between the first fixing frame 321 and the first rotating arm 323 is absorbed, the gap between the second fixing frame 322 and the second rotating arm 325 is absorbed, and the first fixing frame 321 and the second fixing frame 322 are unfolded in place in the direction away from the central axis 31, the folding assembly 3 can better support the bending portion 202 of the flexible display screen 20, thereby avoiding the problem of middle arching of the flexible display screen 20 due to long-term bending, and improving the flatness and reliability of the flexible display screen 20.

Referring to fig. 20 and 21, fig. 20 is a schematic structural view of the structure shown in fig. 18 in a closed state, and fig. 21 is a schematic structural view of the structure shown in fig. 19 in a closed state.

In some embodiments, when the folding assembly 3 is in the closed state, the first fixing frame 321 and the second fixing frame 322 are located on the same side of the central shaft 31 and are disposed opposite to each other, and the first elastic element 36 and the second elastic element 37 may be in a compressed state.

In this embodiment, when the folding assembly 3 is in the closed state, the first elastic element 36 and the second elastic element 37 are in the compressed state, and the elastic force generated by the first elastic element 36 and the second elastic element 37 can also achieve the purpose of absorbing the movement gap, so that the flexible display screen 20 is expanded by the folding device 10, and is not easy to generate wrinkles or arching, thereby having higher reliability.

Wherein, during the movement of the folding assembly 3, the states of the first elastic element 36 and the second elastic element 37 may change, for example, between a compressed state and a natural state, or a degree of compression changes, which is not strictly limited in this application. The degree of compression of the first elastic member 36 and the second elastic member 37 in the open state and the closed state may be the same or different, and the present application is not limited thereto. For example, in some other implementations, the first elastic element 36 and the second elastic element 37 may be in a natural state when the folding assembly 3 is in the closed state.

Meanwhile, because the first rotating arm 323 and the first fixing frame 321 are separated by the first elastic element 36, the second rotating arm 325 and the second fixing frame 322 are separated by the second elastic element 37, and the first elastic element 36 and the second elastic element 37 can deform under the action of external force, during the movement of the folding assembly 3, the movement gap between the first rotating arm 323 and the first fixing frame 321 and the movement gap between the second rotating arm 325 and the second fixing frame 322 can make the relative movement between the first fixing frame 321 and the second fixing frame 322 smoother, and the elastic force of the first elastic element 36 and the second elastic element 37 makes the first fixing frame 321 and the second fixing frame 322 maintain the separated state, so as to better support the bending portion 202 of the flexible display screen 20, and ensure the reliability of the flexible display screen 20.

For example, as shown in fig. 18 and 20, the first support 362 of the first elastic member 36 abuts against the first rotating arm 323, and two ends of the first elastic main body 361 of the first elastic member 36 respectively abut against the first support 362 and the first fixing frame 321. In the embodiment, the first elastic body 361 is used for providing an elastic force to the first elastic member 36, and the connection structure of the first bracket 362 and the first rotation arm 323 is stable and accurate, so that the first elastic member 36 can provide the elastic force and can also accurately cooperate with the first rotation arm 323, which is beneficial to ensuring the movement reliability of the folding assembly 3.

For example, as shown in fig. 18, the first bottom plate 3621 and the first elastic body 361 of the first bracket 362 are located in the first receiving groove 321b, one end of the first elastic body 361 contacts the first bottom plate 3621, the other end of the first elastic body 361 contacts a groove wall of the first receiving groove 321b, and the first engaging piece 3622 is at least partially located at the first communicating hole 321c. The first abutting block 3232 of the second end 323b of the first rotating arm 323 is located at the first communicating opening 321c and abuts against the first fitting block 3622. The first engaging block 3622 may be located at the first communication opening 321c, or may be located at a part of the first communication opening 321c.

In this embodiment, the second end 323b of the first rotating arm 323 is mounted in the first arc-shaped groove 321a, the first bottom plate 3621 and the first elastic body 361 are mounted in the first receiving groove 321b, the first engaging block 3622 and the first abutting block 3232 are engaged with each other at the first communicating hole 321c, and the first rotating arm 323, the first elastic element 36 and the first fixing frame 321 are compactly arranged, so as to fully utilize the space of the first fixing frame 321 and provide space utilization.

The wall surface of the first communication port 321c can also be used for limiting the first abutting block 3232, so as to prevent the first rotating arm 323 from separating from the first fixing frame 321, and improve the reliability of the folding assembly 3.

For example, as shown in fig. 18, when the folding assembly 3 is in the unfolded state, the first abutting block 3232 of the second end 323b of the first rotating arm 323 can contact the top surface 3622a or the transition surface 3622b of the first fitting block 3622 of the first bracket 362; as shown in fig. 20, when the folding assembly 3 is in the closed state, the first abutting block 3232 of the second end 323b of the first rotating arm 323 can contact the connecting surface 3622c of the first engaging block 3622.

In the present embodiment, the first elastic body 361 is in a compressed state in the open state by devising the structure of the first fitting block 3622, the fitting structure of the first rotation arm 323 with the first fitting block 3622 in the open state and the closed state, so as to provide an elastic force. In some embodiments, the first elastic body 361 may be in a compressed state in the closed state by the structure of the first engaging block 3622 and the engaging structure of the first engaging block with the first rotating arm 323.

For example, as shown in fig. 19 and 21, the second support 372 of the second elastic element 37 abuts against the second rotating arm 325, and two ends of the second elastic main body 371 of the second elastic element 37 respectively abut against the second support 372 and the second fixing frame 322. In this embodiment, the second elastic body 371 is used for providing an elastic force to the second elastic element 37, and the connection structure between the second support 372 and the second rotating arm 325 is stable and accurate, so that the second elastic element 37 can provide an elastic force, and can also be accurately matched with the second rotating arm 325, which is beneficial to ensuring the motion reliability of the folding assembly 3.

For example, as shown in fig. 19, the second bottom plate 3721 and the second elastic body 371 of the second bracket 372 are located in the second receiving groove 322b, one end of the second elastic body 371 contacts the second bottom plate 3721, the other end of the second elastic body 371 contacts a groove wall of the second receiving groove 322b, and the second fitting block 3722 is located at least partially in the second communication opening 322c. The second abutting block 3252 at the second end 325b of the second rotating arm 325 is located at the second communicating opening 322c and abuts against the second fitting block 3722. The second fitting block 3722 may be located at the second communication opening 322c entirely or at a part of the second communication opening 322c.

In this embodiment, the second end 325b of the second rotating arm 325 is mounted on the second arc-shaped groove 322a, the second bottom plate 3721 and the second elastic main body 371 are mounted on the second receiving groove 322b, the second matching block 3722 and the second abutting block 3252 are matched at the second communicating hole 322c, and the second rotating arm 325, the second elastic element 37 and the second fixing frame 322 are compactly arranged, so as to fully utilize the space of the second fixing frame 322 and provide space utilization.

The wall surface of the second communicating opening 322c can also be used for the second abutting block 3252 to perform limiting, so as to prevent the second rotating arm 325 from separating from the second fixing frame 322, and improve the reliability of the folding assembly 3.

For example, as shown in fig. 19, when the folding assembly 3 is in the unfolded state, the second abutting block 3252 at the second end 325b of the second rotating arm 325 may contact the top surface 3722a or the transition surface 3722b of the second fitting block 3722 of the second bracket 372; as shown in fig. 21, when the folding assembly 3 is in the closed state, the second abutting block 3252 at the second end 325b of the second rotating arm 325 can contact the connecting surface 3722c of the second mating block 3722.

In the present embodiment, the second elastic body 371 is in a compressed state in the open state by designing the structure of the second fitting block 3722, the fitting structure of the second rotating arm 325 with the second fitting block 3722 in the open state and the closed state, so as to provide the elastic force. In some embodiments, the second resilient body 371 may also be compressed in the closed state by the structure of the second engagement block 3722 and its engagement structure with the second rotation arm 325.

It is understood that in some other embodiments, the matching structure between the first matching block 3622 and the first holding block 3232 and/or the matching structure between the second matching block 3722 and the second holding block 3252 may also have other implementations, and this embodiment is not limited thereto. In other embodiments, the first rotating arm 323 may not be provided with the first abutting block 3232, and the first support 362 may have other structures, and the second end 323b of the first rotating arm 323 directly abuts against the first support 362 from the end of the arc-shaped arm; the second rotating arm 325 may not be provided with the second abutting block 3252, and the second support 372 may also have other structures, and the second end 325b of the second rotating arm 325 directly abuts against the second support 372 from the end of the arc-shaped arm, which is not strictly limited in this embodiment of the present application. In other embodiments, the first elastic element 36 and/or the second elastic element 37 may have other design structures, for example, the first elastic element 36 and/or the second elastic element 37 are integrally an elastic body, and both ends of the elastic body directly contact the corresponding rotating arm and the fixed frame, which is not limited in this embodiment.

Referring to fig. 15 to 17 again, for example, the rotating end 324a of the first transmission arm 324 may be installed in the installation space of the middle shaft 31 and rotatably connected to the middle shaft 31 through the solid shaft structure, for example, a rotating shaft of the rotating end 324a of the first transmission arm 324 may be installed in a rotating shaft hole of the middle shaft 31. The two components are rotationally connected through a solid shaft structure, that is, the two components rotate mutually through a solid rotating shaft, the rotating shaft is provided with a rotating center, the two components rotate around the rotating center relatively, and the rotating shaft can be a structural part independent of the two components and can also be fixedly connected with one structural part. The rotating end 326a of the second transmission arm 326 may be installed in the installation space of the bottom bracket 31 and rotatably connected to the bottom bracket 31 through a solid shaft structure, for example, a rotating shaft of the rotating end 326a of the second transmission arm 326 may be installed in a rotating shaft hole of the bottom bracket 31.

Illustratively, a plurality of synchronizing gears 329 of folding assembly 3 engage a rotating end 324a of first drive arm 324 and a rotating end 326a of second drive arm 326. Wherein, a plurality of synchronizing gears 329 are installed in the installation space of the middle shaft 31, and the synchronizing gears 329 can be rotatably connected with the middle shaft 31 through a solid shaft structure.

In this embodiment, the plurality of synchronizing gears 329 are configured to keep the rotation angles of the first transmission arm 324 and the second transmission arm 326 relative to the central axis 31 synchronous in the movement process of the folding assembly 3, so that the rotation angles of the first fixing frame 321 and the second fixing frame 322 are kept synchronous, the first fixing frame 321 drives the first housing 1 to rotate, and the second fixing frame 322 drives the second housing 2 to rotate, so that the plurality of synchronizing gears 329 can keep the first housing 1 and the second housing 2 synchronous in the movement process of the folding apparatus 10, so as to improve the use experience of the user.

For example, as shown in fig. 15 and 17, the sliding end 324b of the first transmission arm 324 can be installed in the first sliding slot 321d of the first fixing frame 321, and can slide in the first sliding slot 321d to slide relative to the first fixing frame 321. The first damping member 327 is mounted to the sliding end 324b of the first driving arm 324, for example, may be mounted to the first mounting groove 3241. The first concave area 321e of the first fixing frame 321 is located on a side of the second concave area 321f close to the middle shaft 31. As shown in fig. 15, when the folding assembly 3 is in the unfolded state, the first damping member 327 is partially caught in the first recess 321e; as shown in fig. 17, when the folding assembly 3 is in the closed state, the first damping member 327 passes over the first top block 321g and is partially caught in the second recessed area 321f.

As shown in fig. 15 and 16, the sliding end 326b of the second transmission arm 326 can be installed in the second sliding slot 322d of the second fixing frame 322 and can slide in the second sliding slot 322d to slide relative to the second fixing frame 322. The second damping member 328 is mounted to the sliding end 326b of the second transmission arm 326, and may be mounted to the second mounting groove 3261, for example. The third recessed area 322e of the second fixing frame 322 is located on a side of the fourth recessed area 322f close to the middle shaft 31. As shown in fig. 15, when the folding assembly 3 is in the unfolded state, the second damping member 328 is partially caught in the third recessed area 322e; as shown in fig. 16, when the folding assembly 3 is in the closed state, the second damping member 328 passes over the second top block 322g and is partially caught in the fourth recessed area 322f.

In this embodiment, since the folding assembly 3 is provided with the first damping part 327 and the second damping part 328, the first damping part 327 is used for providing a damping force in a process of relative sliding between the first transmission arm 324 and the first fixing frame 321, the first fixing frame 321 is used for connecting the first housing 1 of the folding device 10, the second damping part 328 is used for providing a damping force in a process of relative sliding between the second transmission arm 326 and the second fixing frame 322, the second fixing frame 322 is used for connecting the second housing 2 of the folding device 10, and the first damping part 327 and the second damping part 328 provide a certain damping force in a process of driving the first housing 1 to rotate relative to the central axis 31 by the first fixing frame 321 and driving the second housing 2 to rotate relative to the central axis 31 by the second fixing frame 322, so that a user can experience a better mechanism operation feeling.

Referring again to fig. 14 and 15, the second end 382 of the third rotating arm 38 may be mounted to the middle axle 31 to be rotatably connected to the middle axle 31 via a virtual axle structure; the first end 381 of the third rotating arm 38 may be located outside the bottom bracket 31. Second end 392 of fourth rotating arm 39 may be mounted to central axle 31 for rotational coupling to central axle 31 via a virtual axle configuration; first end 391 of fourth rotating arm 39 may be located outside of central axle 31.

The third rotating arm 38 and the fourth rotating arm 39 can be rotatably connected to the middle shaft 31 through a virtual shaft structure. The rotation center of the third rotating arm 38 relative to the central axis 31 and the rotation center of the first rotating arm 323 relative to the central axis 31 are arranged in a staggered manner, and the rotation center of the fourth rotating arm 39 relative to the central axis 31 and the rotation center of the second rotating arm 325 relative to the central axis 31 are arranged in a staggered manner.

Referring to fig. 22 to 24, fig. 22 is a schematic structural view of the folding assembly 3 shown in fig. 5, fig. 23 is a schematic structural view of the folding assembly 3 shown in fig. 22 at another angle, and fig. 24 is a schematic structural view of the folding assembly 3 shown in fig. 22 in a closed state.

In some embodiments, the first end 381 of the third rotating arm 38 may be pivotally connected to the first shutter 34 via a solid shaft structure. At this time, one end of the third rotating arm 38 is rotatably connected to the center shaft 31, and the first shutter 34 is rotatably connected to the other end of the third rotating arm 38. The first end 391 of the fourth rotating arm 39 may be rotatably connected to the second shutter 35 by a solid shaft structure. At this time, one end of the fourth rotating arm 39 is rotatably connected to the middle shaft 31, and the second shielding plate 35 is rotatably connected to the other end of the fourth rotating arm 39.

The first shielding plate 34 is slidably connected to the first fixing frame 321, and the second shielding plate 35 is slidably connected to the second fixing frame 322. The sliding connection structure between the first shielding plate 34 and the first fixing frame 321 and/or the sliding connection structure between the second shielding plate 35 and the second fixing frame 322 may adopt a matching structure of a sliding chute and a sliding block, which is not strictly limited in this embodiment of the present application.

In this embodiment, the first shielding plate 34 is rotatably connected to the central shaft 31 through the first rotating arm 323 and slidably connected to the first fixing frame 321, the second shielding plate 35 is rotatably connected to the central shaft 31 through the second rotating arm 325 and slidably connected to the second fixing frame 322, and during the rotation of the first fixing frame 321 and the second fixing frame 322 relative to the central shaft 31, the first shielding plate 34 and the second shielding plate 35 also rotate relative to the central shaft 31.

As shown in fig. 22 and 23, when the folding device 10 is in the open state, the first shielding plate 34 shields at least a part of the gap between the first fixing frame 321 and the central shaft 31, and the second shielding plate 35 shields at least a part of the gap between the second fixing frame 322 and the central shaft 31. Therefore, the first shielding plate 34 and the second shielding plate 35 can shield a part of the gap of the folding assembly 10, which is beneficial to the folding assembly 10 to realize the gap self-shielding in the opening state, and improves the reliability of the folding assembly 10.

The above description is only for the specific embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions, such as the reduction or addition of structural elements, the change of shape of structural elements, etc., within the technical scope of the present application, and shall be covered by the scope of the present application; the embodiments and features of the embodiments of the present application may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electronic device (100) comprising a folding apparatus (10) and a flexible display (20);

the folding device (10) comprises a first shell (1), a second shell (2) and a folding assembly (3), wherein the folding assembly (3) is connected with the first shell (1) and the second shell (2), and the first shell (1) and the second shell (2) can be relatively unfolded to be in an open state or relatively folded to be in a closed state through the movement of the folding assembly (3);

the flexible display screen (20) comprises a first non-bending part (201), a bending part (202) and a second non-bending part (203) which are sequentially arranged, the first non-bending part (201) is fixed on the first shell (1), the second non-bending part (203) is fixed on the second shell (2), and the bending part (202) deforms in the process that the first shell (1) and the second shell (2) are relatively unfolded or relatively folded;

the folding assembly (3) comprises a middle shaft (31), a first fixing frame (321), a first rotating arm (323), a first elastic piece (36), a second fixing frame (322), a second rotating arm (325) and a second elastic piece (37);

the first fixing frame (321) is fixedly connected with the first shell (1), and the second fixing frame (322) is fixedly connected with the second shell (2);

the first rotating arm (323) comprises a first end (323 a) and a second end (323 b), the first end (323 a) of the first rotating arm (323) is rotatably connected with the middle shaft (31), the first fixing frame (321) comprises a first arc-shaped groove (321 a), the second end (323 b) of the first rotating arm (323) is an arc-shaped arm and is mounted in the first arc-shaped groove (321 a) to be rotatably connected with the first fixing frame (321), the first elastic member (36) is mounted in the first fixing frame (321), one end of the first elastic member (36) close to the middle shaft (31) contacts the second end (323 b) of the first rotating arm (323), and one end of the first elastic member (36) far away from the middle shaft (31) contacts the first fixing frame (321);

the second rotating arm (325) comprises a first end (325 a) and a second end (325 b), the first end (325 a) of the second rotating arm (325) is rotatably connected with the middle shaft (31), the second fixing frame (322) comprises a second arc-shaped groove (322 a), the second end (325 b) of the second rotating arm (325) is an arc-shaped arm and is mounted on the second arc-shaped groove (322 a) so as to be rotatably connected with the second fixing frame (322), the second elastic member (37) is mounted on the second fixing frame (322), one end of the second elastic member (37) close to the middle shaft (31) contacts the second end (325 b) of the second rotating arm (325), and one end of the second elastic member (37) far away from the middle shaft (31) contacts the second fixing frame (322);

when the first housing (1) and the second housing (2) are in an open state, the first elastic member (36) and the second elastic member (37) are in a compressed state.

2. The electronic device (100) according to claim 1, wherein the first elastic member (36) and the second elastic member (37) are in a compressed state when the first housing (1) and the second housing (2) are in a closed state.

3. The electronic device (100) according to claim 1 or 2, wherein the first elastic member (36) comprises a first elastic body (361) and a first bracket (362), the first bracket (362) is made of a hard material, the first bracket (362) abuts against the first rotating arm (323), and two ends of the first elastic body (361) abut against the first bracket (362) and the first fixing frame (321), respectively.

4. The electronic device (100) according to claim 3, wherein the first bracket (362) includes a first bottom plate (3621) and a first engaging block (3622) protruding from one side of the first bottom plate (3621), the first elastic body (361) is located on one side of the first bottom plate (3621) facing away from the first engaging block (3622), the first engaging block (3622) includes a top surface (3622 a), a transition surface (3622 b) and a connecting surface (3622 c) connected in sequence, the top surface (3622 a) faces away from the first bottom plate (3621) and is spaced apart from the first bottom plate (3621), the transition surface (3622 b) is an arc surface or a free curved surface, the connecting surface (3622 c) extends in a bending manner in a direction approaching the first bottom plate (3621), and the connecting surface (3622 c) is an arc surface or a free curved surface;

when the first casing (1) and the second casing (2) are in an open state, the second end (323 b) of the first rotating arm (323) contacts the top surface (3622 a) or the transition surface (3622 b); when the first casing (1) and the second casing (2) are in a closed state, the second end (323 b) of the first rotation arm (323) contacts the connection surface (3622 c).

5. The electronic device (100) of claim 4, wherein the first fixing frame (321) further comprises a first receiving groove (321 b) and a first communicating opening (321 c), and the first communicating opening (321 c) communicates the first receiving groove (321 b) with the first arc-shaped groove (321 a);

the first bottom plate (3621) and the first elastic body (361) are positioned in the first accommodating groove (321 b), the first elastic body (361) contacts a groove wall of the first accommodating groove (321 b), and the first fitting block (3622) is at least partially positioned at the first communication hole (321 c);

the second end (323 b) of the first rotating arm (323) comprises a first abutting block (3232), and the first abutting block (3232) is located at the first communication port (321 c) and abuts against the first matching block (3622).

6. The electronic device (100) according to any of claims 1 to 5, wherein the central axis (31) comprises a third arc-shaped slot (313) and a fourth arc-shaped slot (314), the third arc-shaped slot (313) and the fourth arc-shaped slot (314) extending to both sides of the central axis (31), respectively;

the first end (323 a) of the first rotating arm (323) is an arc-shaped arm and is mounted to the third arc-shaped slot (313), and the first end (325 a) of the second rotating arm (325) is an arc-shaped arm and is mounted to the fourth arc-shaped slot (314).

7. The electronic device (100) according to any of claims 1 to 6, wherein the folding assembly (3) further comprises a first transmission arm (324) and a second transmission arm (326);

the first transmission arm (324) comprises a rotating end (324 a) and a sliding end (324 b), the rotating end (324 a) of the first transmission arm (324) is rotatably connected with the middle shaft (31), and the sliding end (324 b) of the first transmission arm (324) is slidably connected with the first fixing frame (321);

the second transmission arm (326) comprises a rotating end (326 a) and a sliding end (326 b), the rotating end (326 a) of the second transmission arm (326) is rotatably connected with the middle shaft (31), and the sliding end (326 b) of the second transmission arm (326) is slidably connected with the second fixing frame (322).

8. The electronic device (100) of claim 7, wherein the folding assembly (3) further comprises a first damping member (327), the first damping member (327) being mounted to a sliding end (324 b) of the first transmission arm (324);

the first fixing frame (321) further comprises a first sliding groove (321 d), a first recessed area (321 e) and a second recessed area (321 f) which are communicated with the first sliding groove (321 d), the first recessed area (321 e) is located on one side, close to the middle shaft (31), of the second recessed area (321 f), and the first fixing frame (321) further comprises a first top block (321 g) located between the first recessed area (321 e) and the second recessed area (321 f);

the sliding end (324 b) of the first transmission arm (324) is installed in the first sliding groove (321 d), when the first shell (1) and the second shell (2) are in an opening state, the first damping part (327) is partially clamped into the first recessed area (321 e), when the first shell (1) and the second shell (2) are in a closing state, the first damping part (327) passes through the first ejector block (321 g) and is partially clamped into the second recessed area (321 f).

9. The electronic device (100) of claim 7 or 8, wherein the folding assembly (3) further comprises a plurality of synchronizing gears (329), the plurality of synchronizing gears (329) engaging the rotating end (324 a) of the first drive arm (324) and the rotating end (326 a) of the second drive arm (326).

10. A folding assembly (3) is characterized by comprising a middle shaft (31), a first fixed frame (321), a first rotating arm (323), a first elastic piece (36), a second fixed frame (322), a second rotating arm (325) and a second elastic piece (37);

when the folding assembly (3) is in an open state, the first fixing frame (321) and the second fixing frame (322) are respectively located on two sides of the middle shaft (31), and the first elastic piece (36) and the second elastic piece (37) are in a compressed state.

11. A folding assembly (3) according to claim 10, characterized in that said first (321) and second (322) holders are located on the same side of said central axis (31) and are arranged opposite each other when said folding assembly (3) is in the closed position, said first (36) and second (37) elastic elements being in the compressed position.

12. A folding assembly (3) according to claim 10 or 11, characterized in that said first elastic element (36) comprises a first elastic body (361) and a first support (362), said first support (362) is made of a hard material, said first support (362) abuts against said first rotating arm (323), and two ends of said first elastic body (361) abut against said first support (362) and said first fixed frame (321), respectively.

13. The folding assembly (3) according to claim 12, wherein the first bracket (362) includes a first bottom plate (3621) and a first engaging block (3622) protruding from one side of the first bottom plate (3621), the first elastic body (361) is located on one side of the first bottom plate (3621) facing away from the first engaging block (3622), the first engaging block (3622) includes a top surface (3622 a), a transition surface (3622 b) and a connecting surface (3622 c) connected in sequence, the top surface (3622 a) faces away from the first bottom plate (3621) and is spaced apart from the first bottom plate (3621), the transition surface (3622 b) is an arc surface or a free curved surface, the connecting surface (3622 c) extends in a bending manner in a direction approaching to the first bottom plate (3621), and the connecting surface (3622 c) is an arc surface or a free curved surface;

a second end (323 b) of the first rotation arm (323) contacts the top surface (3622 a) or the transition surface (3622 b) when the folding assembly (3) is in the open state; when the folding assembly (3) is in a closed state, the second end (323 b) of the first rotating arm (323) contacts the connecting surface (3622 c).

14. The folding assembly (3) of claim 13, wherein the first holder (321) further comprises a first receiving groove (321 b) and a first communication port (321 c), the first communication port (321 c) communicating the first receiving groove (321 b) with the first arc-shaped groove (321 a);

the first bottom plate (3621) and the first elastic body (361) are positioned in the first containing groove (321 b), the first elastic body (361) contacts with the groove wall of the first containing groove (321 b), and the first matching block (3622) is at least partially positioned at the first communicating hole (321 c);

the second end (323 b) of the first rotating arm (323) comprises a first abutting block (3232), and the first abutting block (3232) is located at the first communication hole (321 c) and abuts against the first matching block (3622).

15. The folding assembly (3) according to any of claims 10 to 14, characterized in that the central shaft (31) comprises a third arc-shaped slot (313) and a fourth arc-shaped slot (314), the third arc-shaped slot (313) and the fourth arc-shaped slot (314) extending to both sides of the central shaft (31), respectively;

16. The folding assembly (3) of any of claims 10 to 15, characterized in that said folding assembly (3) further comprises a first transmission arm (324) and a second transmission arm (326);

17. The folding assembly (3) of claim 16, wherein the folding assembly (3) further comprises a first damping member (327), the first damping member (327) being mounted to the sliding end (324 b) of the first drive arm (324);

the first fixing frame (321) further comprises a first sliding chute (321 d), a first recessed area (321 e) and a second recessed area (321 f) which are communicated with the first sliding chute (321 d), the first recessed area (321 e) is located on one side, close to the middle shaft (31), of the second recessed area (321 f), and the first fixing frame (321) further comprises a first ejector block (321 g) located between the first recessed area (321 e) and the second recessed area (321 f);

the sliding end (324 b) of the first transmission arm (324) is mounted in the first sliding groove (321 d), when the folding assembly (3) is in an open state, the first damping part (327) is partially clamped into the first recessed area (321 e), and when the folding assembly (3) is in a closed state, the first damping part (327) passes over the first top block (321 g) and is partially clamped into the second recessed area (321 f).

18. The folding assembly (3) of claim 16 or 17, characterized in that said folding assembly (3) further comprises a plurality of synchronizing gears (329), said plurality of synchronizing gears (329) engaging the rotating end (324 a) of said first transmission arm (324) and the rotating end (326 a) of said second transmission arm (326).

19. A folding device (10) comprising a first housing (1), a second housing (2) and a folding assembly (3) according to any one of claims 10 to 18, wherein a first fastening frame (321) of the folding assembly (3) is fixedly connected to the first housing (1) and a second fastening frame (322) of the folding assembly (3) is fixedly connected to the second housing (2).