CN114076144A

CN114076144A - Rotating shaft mechanism, bendable supporting mechanism and flexible display device

Info

Publication number: CN114076144A
Application number: CN202010848360.2A
Authority: CN
Inventors: 韦炜; 洪祝平; 廖德知; 陈松亚; 凡小飞
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2022-02-22

Abstract

The application provides a pivot mechanism, supporting mechanism and flexible display device can buckle, and pivot mechanism includes: a rotating shaft base; the hinge assemblies are arranged on two sides opposite to the rotating shaft base and are rotationally connected with the rotating shaft base; one end of the control sliding block is elastically connected with the hinge assembly, and the other end of the control sliding block is connected with the shell; the rotating arm is arranged in parallel with the hinge assembly and is positioned on the outer side of the hinge assembly, and the rotating arm is rotatably connected with the rotating shaft base; and one end of the transmission sliding block is connected with the rotating arm in a sliding mode, the other end of the transmission sliding block is connected to the hinge assembly, and when the rotating shaft mechanism is in a folded state, the control sliding block is clamped between the transmission sliding block and the hinge assembly and is abutted against the transmission sliding block under the action of the action force exerted by the transmission sliding block. The application provides a pivot mechanism, supporting mechanism and flexible display device can buckle the tensile deformation of reducible flexible screen, improves the life and the reliability of flexible screen.

Description

Rotating shaft mechanism, bendable supporting mechanism and flexible display device

Technical Field

The application relates to the technical field of electronics, concretely relates to pivot mechanism, supporting mechanism and flexible display device can buckle.

Background

Along with the wide application of flexible display device, flexible display device's the in-process of buckling repeatedly, flexible screen is stretched many times, easily causes the inner line of flexible screen to be destroyed, flexible screen not in time resume after being stretched and produce hunch-up or flexible screen produce irreversible deformation scheduling problem, consequently, how to improve flexible display device and in-process of buckling repeatedly, reduce the tensile deformation of flexible screen, improve the life and the reliability of flexible screen, become the technical problem that needs the solution.

Disclosure of Invention

The application provides a pivot mechanism, supporting mechanism and flexible display device that can buckle of tensile deformation of reducible flexible screen, the life and the reliability that improve flexible screen.

In a first aspect, the present application provides a spindle mechanism comprising:

a rotating shaft base;

the hinge assemblies are arranged on two sides opposite to the rotating shaft base and are rotationally connected with the rotating shaft base;

one end of the control sliding block is elastically connected with the hinge assembly, and the other end of the control sliding block is connected with the shell;

the rotating arm is arranged in parallel with the hinge assembly and is positioned on the outer side of the hinge assembly, and the rotating arm is rotatably connected with the rotating shaft base; and

and one end of the transmission sliding block is connected with the rotating arm in a sliding manner, the other end of the transmission sliding block is connected to the hinge assembly, and when the rotating shaft mechanism is in a folded state, the control sliding block is clamped between the transmission sliding block and the hinge assembly and is abutted against the transmission sliding block under the action of the action force exerted by the transmission sliding block.

In a second aspect, the present application provides a bendable supporting mechanism, the bendable supporting mechanism includes first casing, second casing and pivot mechanism, the first hinge and the second hinge of pivot mechanism rotate respectively connect in the relative both sides of pivot base, the first control slider and the second control slider of pivot mechanism are fixed connection respectively first casing with the second casing, the first rotor arm and the second rotor arm of pivot mechanism are sliding connection respectively first casing with the second casing.

In a third aspect, the present application provides a flexible display device, which includes a flexible screen and a bendable supporting mechanism, wherein the flexible screen is fixedly connected to the first housing and the second housing.

The utility model provides a pivot mechanism, supporting mechanism and flexible display device can buckle, through rational design hinge subassembly, the transmission slider, the rotor arm, control slider's structure and cooperation relation, can be when the kink bending process of flexible screen produces tensile deformation, make control slider move the tensile deformation of the kink of the synchronous correspondence flexible screen of pivot base, in order to offset the tensile deformation of the kink of flexible screen, in order to make flexible screen length keep unchangeable basically in folding process, thereby increase the life and the reliability of flexible screen.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a bendable supporting mechanism according to an embodiment of the present application.

Fig. 3 is a cross-sectional view of a flexible display device according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a flattened state of a spindle mechanism when no force is applied to the first housing and the second housing according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a spindle mechanism in a flattened state when a force is applied to a first housing and a second housing according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a rotating shaft mechanism provided by an embodiment of the present application from a viewing angle in a folded state.

Fig. 7 is a schematic structural diagram of a hinge mechanism provided in an embodiment of the present application from another perspective in a folded state.

Fig. 8 is an exploded schematic view of a spindle mechanism according to an embodiment of the present disclosure.

Fig. 9 is a schematic diagram of the movement locus of the flexible screen when the control slider and the transmission slider are not provided.

Fig. 10 is a schematic structural diagram of a synchronous rotating assembly according to an embodiment of the present application.

Fig. 11 is an exploded view of a synchronous rotating assembly according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments listed in the present application may be appropriately combined with each other.

Embodiments of the present disclosure provide a flexible display device, which may be a Bendable (Bendable) display device, a Foldable (Foldable) display device, or a Bendable (Rollable) display device. In this embodiment, the flexible display device may be bent at a fixed angle, or may be bent at an arbitrary angle (0 ° to 360 ° or 0 ° to 180 °) in one plane.

In this embodiment, the flexible display device may be folded along one or more folding axes to form a folded device. The application takes the flexible display device folded along a folding axis as an example for illustration, and is not repeated in the follow-up process. For example, the flexible display device provided in the embodiments of the present application may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an electronic reader, a handheld computer, an electronic display screen, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a Personal Digital Assistant (PDA), an Augmented Reality (AR) device, a media player, a watch, a necklace, glasses, a headset, or other devices having a flexible screen.

Hereinafter, a flexible display device provided in an embodiment of the present application will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure. In this embodiment, the direction of the folding axis of the flexible display device 1000 in fig. 1 is defined as the X-axis direction. The length directions of the two sides of the folding axis are respectively a positive Y-axis direction and a negative Y-axis direction, and the thickness directions of the first housing and the second housing of the flexible display device 1000 are defined as a Z-axis direction. Wherein the direction indicated by the arrow is the forward direction.

Referring to fig. 1, the flexible display device 1000 includes a flexible screen 100 and a bendable supporting mechanism 200. The flexible screen 100 is disposed on the bendable support mechanism 200. The bendable supporting mechanism 200 is used for driving the flexible screen 100 to fold or unfold.

Referring to fig. 2 and 3, the foldable supporting mechanism 200 includes a first housing 10, a rotating shaft mechanism 20 and a second housing 30 sequentially connected along the Y-axis direction. The rotation shaft mechanism 20 is a first side on a side in the Y-axis forward direction, and the rotation shaft mechanism 20 is a second side on a side in the Y-axis reverse direction. The first housing 10 and the second housing 30 are respectively rotatably connected to the first side and the second side of the rotating shaft mechanism 20. It is understood that the interior of the first casing 10 and the interior of the second casing 30 both have a receiving space for receiving one or more of a battery, a circuit board, a sensor, a camera, a receiver, etc.

The flexible panel 100 includes a first flat portion 101, a bent portion 102, and a second flat portion 103, which are sequentially arranged along the Y-axis direction and integrally formed. The first flat portion 101 may be attached to the first casing 10 by an adhesive, and the second flat portion 103 may be attached to the second casing 30 by an adhesive. The bent portion 102 corresponds to the rotating shaft mechanism 20, and the bent portion 102 may be slidably connected to the rotating shaft mechanism 20 or may not be connected through a medium, so that the bent portion 102 can be flexibly bent with respect to the rotating shaft mechanism 20. The bent portion 102 can be bent along with the folding of the first and

second housings

10 and 30, and the bent portion 102 can also be flattened along with the flattening of the first and

second housings

10 and 30. During the folding process of the foldable display device 1000, the first housing 10 and the second housing 20 rotate around the rotating shaft mechanism 20, and the first housing 10 and the second housing 20 can generate acting force on two sides of the bending part 102 of the flexible screen 100, so that the bending part 102 of the flexible screen 100 is in a free bending state during the folding process and in a tensioning state during the flattening process.

This application can make the rate of tension of flexible screen 100 when the exhibition state be greater than the rate of tension of flexible screen 100 when fold condition through design pivot mechanism 20. The so-called tautness in this application is used to characterize the degree to which the flexible screen 100 is stretched. The greater the tension, the greater the amount of stretching of the flexible screen 100. Specifically, when the flexible display device 1000 is in the flat state, the first housing 10 and the second housing 30 respectively generate acting forces in the Y-axis forward direction and the Y-axis reverse direction on the bending portion 102 of the flexible screen 100 under the action of the rotating shaft mechanism 20, so that the bending portion 102 of the flexible screen 100 is stretched, the bending portion 102 can be displayed in the flat state, and the bending portion 102 can be effectively prevented from bulging and affecting the display. When the flexible display device 1000 is in the folded state, the first housing 10 and the second housing 30 respectively generate no tensile force or a small tensile force on the bent portion 102 of the flexible screen 100 under the action of the rotating shaft mechanism 20, so that the bent portion 102 of the flexible screen 100 is not stretched or is stretched to a small extent, that is, the bent portion 102 of the flexible screen 100 is in the free-bending state.

Referring to fig. 4, the hinge mechanism 20 according to the embodiment of the present disclosure includes a hinge base 1, a hinge assembly 2, a control slider 3, a rotating arm 4, and a transmission slider 5.

The hinge assemblies 2 are arranged on two sides opposite to the rotating shaft base 1 and are rotatably connected with the rotating shaft base 1. Specifically, the hinge assembly 2 includes a first hinge 21 and a second hinge 22. The first hinge 21 and the second hinge 22 are rotatably connected to the first side and the second side of the rotation shaft base 1, respectively.

One end of the control slider 3 is elastically connected to the hinge assembly 2, and the other end of the control slider 3 is connected to the housing (the first housing 10 or the second housing 30). In particular, the number of control sliders 3 may be at least two, and in particular comprise a first control slider 31 and a second control slider 32. One end of the first control slider 31 is elastically connected to one end of the first hinge 21, and the other end of the first control slider 31 is fixedly connected to the first housing 10. One end of the second control slider 32 may be elastically connected to one end of the second hinge 22, and the other end of the second control slider 32 may be fixedly connected to the second housing 30. The first control slider 31 and the second control slider 32 may be diagonally symmetrically disposed. When the first casing 10 and the second casing 30 bring the flexible screen 100 to fold, the first control slider 31 and the second control slider 32 can be brought to move synchronously.

The rotating arm 4 is juxtaposed to the hinge assembly 2 and is located outside the hinge assembly 2. The rotating arm 4 is rotatably connected with the rotating shaft base 1. Specifically, the number of the rotating arms 4 is at least one pair. In the present embodiment, the number of the rotating arms 4 is two, and the two rotating arms are respectively referred to as a first rotating arm assembly 41 and a second rotating arm assembly 42. The first and second

swing arm assemblies

41 and 42 are juxtaposed with the hinge assembly 2 in the X-axis direction and are located outside both sides of the hinge assembly 2, respectively. Specifically, the first hinge 21, the rotating shaft base 1, and the second hinge 22 are sequentially arranged along the Y-axis direction, the first rotating arm assembly 41 is arranged on one side of the first hinge 21, the rotating shaft base 1, and the second hinge 22 along the X-axis direction, and the second rotating arm assembly 42 is arranged on the other side of the first hinge 21, the rotating shaft base 1, and the second hinge 22 along the X-axis direction.

The first rotating arm assembly 41 includes a first rotating arm 43 and a second rotating arm 44 arranged in the Y-axis direction. The first rotating arm 43 and the second rotating arm 44 may be respectively disposed on the first side and the second side of the rotating shaft base 1. The first and second

rotating arms

43 and 44 slidably connect the first and

second housings

10 and 30, respectively, in the Y-axis direction. The second rotating arm assembly 42 includes a third rotating arm 45 and a fourth rotating arm 46 arranged in the Y-axis direction. The fourth rotating arm 46 is disposed diagonally to the first rotating arm 43. The third rotating arm 45 is disposed diagonally to the second rotating arm 44. The third rotating arm 45 and the fourth rotating arm 46 can be respectively arranged on the first side and the second side of the rotating shaft base 1. The third and fourth

rotating arms

45 and 46 slidably connect the first and

second housings

10 and 30, respectively, in the Y-axis direction.

The spindle mechanism 20 further includes at least two sets of synchronous rotating assemblies connected to the spindle base 1. The two sets of synchronous rotating assemblies illustrated in this embodiment are referred to as a first synchronous rotating assembly 61 and a second synchronous rotating assembly 62. The first synchronous rotating component 61 and the second synchronous rotating component 62 are disposed on two opposite sides of the rotating shaft base 1 along the X-axis direction. Opposite ends of the first synchronous rotating assembly 61 are rotatably connected to the first rotating arm 43 and the second rotating arm 44, respectively, so that the first rotating arm 43 and the second rotating arm 44 rotate synchronously, and thus the first casing 10 and the second casing 30 rotate synchronously. Opposite ends of the second synchronous rotating assembly 62 are respectively rotatably connected to the third rotating arm 45 and the fourth rotating arm 46, so that the third rotating arm 45 and the fourth rotating arm 46 rotate synchronously, and further the first casing 10 and the second casing 30 rotate synchronously.

One end of the transmission slide block 5 is connected with the rotating arm 4 in a sliding way. The other end of the transmission slider 5 is connected to the hinge assembly 2. Specifically, the number of the transmission sliders 5 may be two, and is referred to as a first transmission slider 51 and a second transmission slider 52. A part of the first transmission slider 51 is provided on the first rotation arm 43, is slidably connected to the first rotation arm 43, and has a direction in which both slide with each other slightly inclined with respect to the Y-axis direction. The other part of the first transmission slider 51 is disposed on the first hinge 21 and slidably connected to the first hinge 21, and the sliding direction of the two is the X-axis direction. In this embodiment, the first transmission slider 51 and the second transmission slider 52 have the same structure, and the first transmission slider 51 and the second transmission slider 52 are arranged in diagonal symmetry. In other embodiments, the structures of the first transmission slider 51 and the second transmission slider 52 may be different, or the first transmission slider 51 and the second transmission slider 52 are arranged in mirror symmetry.

When the rotating shaft mechanism 20 is in the flattening state, the control slider 3 may be in contact with or spaced from the transmission slider 5. When the rotating shaft mechanism 20 is in the folded state, the control slider 3 is clamped between the transmission slider 5 and the hinge assembly 2 and abuts against the transmission slider 5 under the action of the action force exerted by the transmission slider 5. In the present embodiment, the spindle mechanism 20 includes two control sliders, i.e., a first control slider 31 and a second control slider 32. The first control slider 31 is disposed between the first hinge 21 and the first transmission slider 51. The second control slider 32 is arranged between the second hinge 22 and the second transmission slider 52. Specifically, when the foldable display device 1000 is in the folded state, the first control slider 31 is sandwiched between the first transmission slider 51 and the first hinge 21, and abuts against the first transmission slider 51 under the action of the first transmission slider 51; the second control slider 32 is held between the second transmission slider 52 and the second hinge 22, and is abutted against the second transmission slider 52 by the action force exerted by the second transmission slider 52.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the rotating shaft mechanism 20 under the pulling force of the flexible screen 100. When the rotating shaft mechanism 20 is in the flat state, the first control slider 31 receives the acting force F1 of the first casing 10 and the acting force of the first hinge 21 to form a small gap 53 with the first transmission slider 51, and the second control slider 32 receives the acting force F2 of the second casing 30 and the acting force of the second hinge 22 to form a small gap 54 with the second transmission slider 52, so that the first control slider 31 is balanced under the acting force between the first hinge 21 and the first casing 10, and the second control slider 32 is balanced under the acting force between the second hinge 22 and the second casing 30, so that the rotating shaft mechanism 20 is kept in the flat state when in the flat state, and an operator can use the rotating shaft mechanism 20 in the flat state conveniently.

In this embodiment, the first and second synchronous rotating

assemblies

61 and 62 are connected to both sides of the rotation shaft base 1 in the X-axis direction, respectively. The first and second

rotating arms

43 and 44 are rotatably coupled at both sides of the first synchronizing rotary assembly 61 in the Y-axis direction, respectively. The third rotating arm 45 and the fourth rotating arm 46 are rotatably connected to both sides of the second synchronizing rotary member 62 in the Y-axis direction, respectively. The first hinge 21 and the second hinge 22 are rotatably connected to both sides of the rotation shaft base 1 in the Y-axis direction, respectively. The first control slider 31 is elastically connected to one end of the first hinge 21 remote from the second hinge 22, and the first transmission slider 51 is provided to the first hinge 21 and the first rotation arm 43. The second control slider 32 is elastically connected to one end of the second hinge 22 away from the first hinge 21, and a second transmission slider 52 is provided on the second hinge 22 and the second rotating arm 44. Referring to fig. 5, when the foldable display device 1000 is in the unfolded state, a gap 53 is formed between the first transmission slider 51 and the first control slider 31, and a gap 54 is formed between the second transmission slider 52 and the second control slider 32. Referring to fig. 6 and 7, when the foldable display device 1000 is in the folded state, the first transmission slider 51 abuts against the first control slider 31, and the second transmission slider 52 abuts against the second control slider 32. It can be understood that, during the process of rotating the foldable display device 1000 from the unfolded state to the folded state, the first control slider 31 and the first transmission slider 51 are gradually abutted under the action of the first hinge 21 and the first housing 10, and the second transmission slider 52 and the second control slider 32 are gradually abutted under the action of the second hinge 22 and the second housing 30.

The inner cavity of the first housing 10 can accommodate the first rotating arm 43, the first transmission slider 51, the first control slider 31, at least a part of the first hinge 21 and the third rotating arm 45. The first and third

rotating arms

43 and 45 are slidably connected to the first casing 10 in the Y-axis direction, and the first control slider 31 is fixedly connected to the first casing 10. The second housing 30 has an interior for receiving the second pivot arm 44, the second actuator slide 52, the second control slide 32, at least a portion of the second hinge 22, and the fourth pivot arm 46. The second and fourth

rotating arms

44, 46 are slidably connected to the second housing 30 along the Y-axis direction, and the second control slider 32 is fixedly connected to the second housing 30. It can be understood that the first casing 10 and the second casing 30 can move toward or away from each other under the action of the first control slider 31 and the second control slider 32 to bring the bending portion 102 of the flexible screen 100 into the non-tensioned state or the tensioned state.

Referring to fig. 6, in the process of bending the first and

second casings

10 and 30 from the flat state to the folded state, the first and second

rotating arms

43 and 44 rotate around the first synchronous rotating assembly 61 under the driving of the first and

second casings

10 and 30, the third and fourth

rotating arms

45 and 46 rotate around the second synchronous rotating assembly 62 under the driving of the first and

second casings

10 and 30, the first control slider 31 and the first hinge 21 rotate around the rotating shaft base 1 under the driving of the first casing 10, and the second control slider 32 and the second hinge 22 rotate around the rotating shaft base 1 under the driving of the second casing 30. One end of the first hinge 21 gradually rotates out of the rotating shaft base 1, and a distance difference is generated between the first hinge 21 and the first rotating arm 43 in the length direction, so that the first hinge 21 drives the first transmission slide block 51 to move relative to the first rotating arm 43; due to the guiding structure of the relative movement of the first rotation arm 43 and the first transmission slider 51, the first transmission slider 51 can be moved in the Y-axis positive direction and also in the X-axis negative direction with respect to the first rotation arm 43.

Further, the side of the first transmission slider 51 adjacent to the first hinge 21 has a first inclined edge 518. The extending direction of the first inclined edge 518 intersects the sliding direction of the first control slider 31. The first control slider 31 has a second inclined edge 315 corresponding to the first inclined edge 518. The side of the second transmission slider 52 adjacent to the second hinge 22 is provided with a first inclined edge 518. The second control slider 32 has a second inclined edge 315 corresponding to the first inclined edge 518.

By designing the inclined edge of the first transmission slide block 51 and the first control slide block 31, which are abutted against each other, the first transmission slide block 51 pushes the first control slide block 31 to move towards the direction close to the rotating shaft base 1. On the side of the second hinge 22, the second hinge 22 drives the second transmission slider 52 to move along the positive direction of the X axis while moving along the negative direction of the Y axis relative to the second rotation arm 44 during the rotation process, so that the second transmission slider 52 pushes the second control slider 32 to move towards the direction close to the rotation shaft base 1. Thus, the first control slider 31 and the second control slider 32 both generate a motion close to the rotating shaft base 1 in the process of folding the flexible display device 1000, the first control slider 31 and the second control slider 32 can respectively drive the bending portion 102 of the flexible screen 100 to move towards the central axis of the bending portion 102 through the first housing 10 and the second housing 30, so as to effectively relieve the bending portion 102 of the flexible screen 100 from being stretched in the folding process, so that the length of the bending portion 102 of the flexible screen 100 is basically kept unchanged in the folding process, thereby improving the service life of the flexible screen 100 and improving the reliability of the flexible display device 1000.

The rotating shaft mechanism 20 provided in the embodiment of the present application reasonably designs the structure and the matching relationship of the hinge assembly 2, the transmission slider 5, the rotating arm 4, and the control slider 3 according to the time of the flexible screen 100 undergoing tensile deformation and the deformation amount of the flexible screen 100 undergoing tensile deformation during the folding process, so as to control the time of the flexible screen 100 undergoing tensile deformation during the folding process to correspond to the time of the transmission slider 5 pushing the control slider 3 to move toward the rotating shaft base 1, and control the deformation amount of the flexible screen 100 undergoing tensile deformation during the folding process to correspond to the displacement amount of the transmission slider 5 pushing the control slider 3 to move toward the rotating shaft base 1, so that during the process of the flexible screen 100 undergoing tensile deformation, the control slider 3 moves toward the rotating shaft base 1 and corresponds to the tensile deformation of the bending portion 102 of the flexible screen 100, so as to counteract the tensile deformation of the bending portion 102 of the flexible screen 100, so that the length of the flexible screen 100 remains substantially constant during the folding process, thereby increasing the service life and reliability of the flexible screen 100.

Referring to fig. 8, the first hinge 21 includes a first sliding portion 211 in a circular arc shape. The rotating shaft base 1 is provided with a first sliding chute which comprises a first arc-shaped sub sliding chute 11. The first sliding portion 211 is at least partially disposed in the first sub-sliding groove 11 and slides along the first sub-sliding groove 11. The second hinge 22 is disposed symmetrically to the first hinge 21. The second hinge 22 includes a second sliding portion 221 having a circular arc shape. The rotating shaft base 1 is provided with a circular arc-shaped second sub-sliding groove 12. The first sub-sliding grooves 11 and the second sub-sliding grooves 12 are arranged in a row along the Y-axis direction. The second sliding portion 221 is at least partially disposed in the second sub-sliding groove 12 and slides along the second sub-sliding groove 12.

The first sliding part 211 of the first hinge 21 has a first notch 212 in the middle of the end near the second hinge 22, and a first protrusion 213 and a second protrusion 214 on opposite sides of the first notch 212. The second sliding part 221 of the second hinge 22 is provided with a third convex tooth 222 in the middle of the end part close to the first hinge 21, and a second notch 223 and a third notch 224 which are positioned at two opposite sides of the third convex tooth 222.

When the first hinge 21 and the second hinge 22 are in the folded state, the end surface of the first hinge 21 is opposite to or intersects with the end surface of the second hinge 22.

When the first hinge 21 and the second hinge 22 are in the flattened state, the first sliding portion 211 of the first hinge 21 and the second sliding portion 221 of the second hinge 22 abut against each other. Specifically, the first protrusion 213 passes through the second notch 223 and extends out of the second notch 223, the second protrusion 214 passes through the third notch 224 and extends out of the third notch 224, and the third protrusion 222 passes through the first notch 212 and extends out of the first notch 212, so that the space occupied by the first sliding portion 211 of the first hinge 21 and the second sliding portion 221 of the second hinge 22 along the Y-axis direction can be reduced, and the space of the foldable display device 1000 can be saved.

Referring to fig. 9, assuming that the flexible screen 100 rotates along the movement track of the first sliding portion 211, the flexible screen 100 has a point a in the unfolded state, and the point a moves to a point a' when the flexible screen 100 is in the folded state. The arc radius and the center C of the first sub-chute 11 are designed to make the linear distance between the point a and the central reference point O equal to the arc length between the point a' and the central reference point O, so that the lengths of the flexible screen 100 in the flat state and the folded state are unchanged. The rotation angle of the flexible screen 100 from the flat state to the folded state may be 90 °, and the radian corresponding to the arc between the point a' and the central reference point O may be 90 °. The central reference point O is positioned on the horizontal plane of the point A and is also positioned at the lowest point of the quarter of the circular arc of the point A'. In the process of the flexible screen 100 from the flat state to the bent state, the point a on the flexible screen 100 passes through the point E 'to the point a', wherein the length of the flexible screen 100 is stretched to the maximum size at the point E 'and EE' is greater than OA. In other words, the length of the flexible screen 100 increases and then decreases during the process of the flexible screen 100 from the flat state to the bent state. In the process of the flexible screen 100 from the bent state to the flattened state, the point a 'on the flexible screen 100 passes through the point E' to the point a, and the length of the flexible screen 100 is increased and then decreased.

This application embodiment is through setting up transmission slider 5 and control slider 3, transmission slider 5 can drive control slider 3 towards pivot base 1 motion at the pivoted in-process, when the kink 102 of flexible screen 100 produces tensile deformation, control slider 3 can drive the kink 102 of flexible screen 100 towards the center pin removal of kink 102 through the casing under the effect of transmission slider 5, in order to offset the tensile deformation of kink 102, so, the length of flexible screen 100 can remain unchanged when not only bending state and flat-out state, in the in-process of buckling, also can make the length change of flexible screen 100 little or basically unchanged, in order to reduce folding display device 1000 many times, the damage to flexible screen 100 in the flat-out process.

Referring to fig. 4 and 8, the hinge base 1 includes a hinge bottom case 13 and a hinge cover 14 covering the hinge bottom case 13. The first sub-sliding groove 11 and the second sub-sliding groove 12 are disposed on the bottom shell 13 of the rotating shaft. The rotating shaft cover plate 14 is provided with at least one second through hole 141. In this embodiment, the number of the second through holes 141 is three. When the hinge assembly 2 is in the flattened state, the rotating shaft cover plate 14 covers the first sliding portion 211 of the first hinge 21 and the second sliding portion 221 of the second hinge 22, and the end portion of the hinge assembly 2 is located in the second through hole 141. Specifically, when the hinge assembly 2 is in the flattened state, the first protrusion 213 extends into one second through hole 141, the second protrusion 214 extends into the other second through hole 141, and the third protrusion 222 extends into the other second through hole 141, so as to limit the rotation of the first hinge 21 and the second hinge 22 to the flattened state.

Each of the first hinge 21 and the second hinge 22 includes a first side plate 215, a second side plate 216, a third side plate 217, and a fourth side plate 218. For the first hinge 21, the first side plate 215 is connected to the first sliding portion 211 of the first hinge 21 and is located outside the rotation shaft base 1. For the second hinge 22, the first side plate 215 is connected to the second sliding portion 221 of the second hinge 22 and is located outside the rotation shaft base 1. The second side plate 216 and the third side plate 217 are respectively connected to two opposite ends of the first side plate 215. The fourth side plate 218 is opposite to the first side plate 215 and is connected to the second side plate 216 and the third side plate 217.

Referring to fig. 8, for the first hinge 21, the second side plate 216 is close to the first rotating arm 43, and the third side plate 217 is close to the third rotating arm 45. The third side plate 217, the first side plate 215, the fourth side plate 218, and the second side plate 216 surround and form a second chute 219 and a first through hole 220 communicating with the second chute 219. The first through hole 220 and the second sliding groove 219 are disposed along the positive direction of the Z axis. The second chute 219 penetrates the first hinge 21 in the positive Y-axis direction to form an opening. The first through hole 220 and the opening are respectively located in two perpendicular directions. That is, the first through hole 220 is located in the Z-axis direction, and the opening is located in the Y-axis direction. The fourth side plate 218, part of the third side plate 217, part of the second side plate 216, and part of the first rotation arm 43 form a support plate for supporting the first transmission slider 51. The structure of the second hinge 22 is the same as that of the first hinge 21, so the specific structure of the second hinge 22 can refer to that of the first hinge 21.

Referring to fig. 4, the first hinge 21 and the first rotating arm 43 are arranged in parallel in the X-axis direction. One end of the first transmission slider 51 is provided on the first rotation arm 43 and is slidably connected to the first rotation arm 43. Specifically, the portion of the first transmission slider 51 provided on the first rotation arm 43 has a slide 511 extending in a curve. The first rotating arm 43 has a sliding column 431 adapted to the slideway 511. During the rotation of the first rotating arm 43 about the first synchronizing rotary group 61, the spool 431 slides along the slide 511. In particular, the slideway 511 is provided close to and along the free end 512 of the first transmission slider 51. The free end 512 of the first transmission slider 51 is the end opposite to the first rotation arm 43.

The chute 511 includes oppositely disposed first and second ends 513, 514. The first end 513 is closer to the spindle base 1 than the second end 514. A line between the first end 513 and the second end 514 intersects a line through the free end 512. In other words, a straight line between the first end 513 and the second end 514 intersects the X-axis direction. The first end 513 is closer to the edge of the free end 512 of the first transmission slide 51 than the second end 514. Specifically, the distance between the first end 513 and the edge of the free end 512 is a first distance, the distance between the second end 514 and the edge of the free end 512 is a second distance, and the difference between the second distance and the first distance may be similar to or equal to the length of the flexible screen 100 stretched during the bending process.

Referring to fig. 8, the chute 511 includes a first slot section 515, a second slot section 516, and a third slot section 517 sequentially disposed between the first end 513 and the second end 514. First end 513 is a wall of the first slot segment 515 on a side away from second slot segment 516, and second end 514 is a wall of the third slot segment 517 on a side away from second slot segment 516. The first groove segment 515 extends along a first track. The second groove segment 516 extends along a second track. The third slot segment 517 extends along a third track. The first trajectory, the second trajectory, and the third trajectory are also the movement trajectories of the slide column 431 along the slide 511. The second track, the first track and the third track are not positioned on the same straight line. The first track and the third track are on two parallel straight lines.

The angle between the first track and the edge of the free end 512 (Y-axis direction) is smaller than the angle between the second track and the edge of the free end 512. The angle between the third track and the edge of the free end 512 is smaller than the angle between the second track and the edge of the free end 512. In other words, the first trajectory may be a straight trajectory along the Y-axis direction or an inclined trajectory having a small inclination angle with respect to the Y-axis direction. The second trajectory is an inclined trajectory having a relatively large inclination angle with respect to the Y-axis direction. The third trajectory is a straight trajectory along the Y-axis direction or an inclined trajectory having a small inclination angle with respect to the Y-axis direction.

Referring to fig. 4 and 6, in the rotating process from the unfolded state to the folded state of the first sliding portion 211 of the first hinge 21, the first sliding portion 211 of the first hinge 21 gradually rotates out of the rotating shaft base 1, so that in the transmission process, a distance difference is generated between the first hinge 21 and the first rotating arm 43 along the Y-axis direction, the first hinge 21 drives the first transmission slider 51 to gradually move away from the rotating shaft base 1, and due to the guiding function of the sliding column 431 on the first rotating arm 43, the first transmission slider 51 gradually moves away from the rotating shaft base 1 and also gradually moves in the reverse direction along the X-axis direction.

When the spindle mechanism 20 is in the flattened state, the spool 431 is located in the third slot segment 517, and in particular, the spool 431 may be adjacent to or abut the second end 514. When the spindle mechanism 20 is in the folded state, the sliding column 431 is located in the first slot section 515, and in particular, the sliding column 431 may be close to or abut against the first end 513. When the rotating shaft is folded to a preset angle value, the sliding column 431 is located at the second groove section 516.

In the process of moving the rotating shaft mechanism 20 from the flat state to the folded state, the sliding column 431 is driven by the first rotating arm 43 to move from the second end 514 to the first end 513 through the third slot section 517, the second slot section 516 and the first slot section 515 in sequence. The lengths and the inclination angles of the third slot segment 517, the second slot segment 516 and the first slot segment 515 are designed so that the time and the displacement of the first transmission slider 51 pushing the first control slider 31 to approach the rotating shaft base 1 are matched with the time and the length of the flexible screen 100 stretched in the folding process. During the movement of the strut 431, the strut 431 drives the transmission slider 5 to move along the X-axis in the opposite direction relative to the first rotation arm 43 and the first hinge 21. The transmission slider 5 and the first control slider 31 are arranged along the Y-axis direction. The transmission slider 5 can synchronously push the first control slider 31 to move reversely along the Y axis when moving reversely along the X axis, so that the first control slider 31 drives the local part of the flexible screen 100 to draw close towards the center of the bending part 102 through the first shell 10, so as to counteract the stretching deformation of the flexible screen 100 in the bending process. It can be understood that the structure of the second side of the rotation shaft base 1 and the structure of the first side are arranged in a mirror symmetry manner or are symmetrical about a diagonal line, so that the second control slider 32 can also drive the local portion of the flexible screen 100 to be close to the central axis of the bending portion 102 through the second housing 30, so that the stretching deformation during the bending process can be offset by both sides of the bending portion 102 of the flexible screen 100.

When the rotating shaft mechanism 20 is in the folded state, the first control slider 31 makes the bending portion 102 of the flexible screen 100 in the non-tensioned state or the relaxed state under the abutting force of the first transmission slider 51 and the second control slider 32 under the abutting force of the second transmission slider 52, so that the bending portion 102 is in the free bending state.

When the rotating shaft mechanism 20 is in the process of being folded to be unfolded, the sliding column 431 is driven by the first rotating arm 43 to move from the first end 513 to the second end 514 through the first groove section 515, the second groove section 516 and the third groove section 517 in sequence. During the movement of the sliding column 431, the sliding column 431 drives the first transmission slider 51 to move along the positive direction of the X axis relative to the first rotation arm 43 and the first hinge 21. The first transmission slide block 51 may gradually get away from the first control slide block 31 when moving in the forward direction along the X axis, and the first control slide block 31 may gradually get away from the rotation shaft base 1 under the elastic action. Through the first hinge 21 and the first rotating arm 43, the first rotating arm 43 drives the first transmission slider 51 to be away from the rotating shaft base 1 by the strut 431 by a distance greater than a distance of the first control slider 31 to be away from the rotating shaft base 1, so that when the rotating shaft mechanism 20 is in a flattened state, a gap 53 is formed between the first transmission slider 51 and the first control slider 31, the first control slider 31 is subjected to an elastic thrust of the first hinge 21 along the Y-axis forward direction along the X-axis direction, the elastic thrust causes the first control slider 31 to generate a tensile force towards the Y-axis forward direction on the bending part 102 of the flexible screen 100, and on a second side on the rotating shaft base 1, the second control slider 32 generates a tensile force towards the Y-axis reverse direction on the bending part 102 of the flexible screen 100, so that the bending part 102 of the flexible screen 100 is in a tensioned state in the flattened state; meanwhile, the first control slider 31 and the second control slider 32 maintain force balance in the Y-axis direction, so that the rotating shaft mechanism 20 can maintain its flattened state in the flattened state.

Referring to fig. 8, the first control slider 31 includes a bottom plate 311 and a bump 312 disposed on the bottom plate 311. The bottom plate 311 is housed in the second sliding groove 219 of the first hinge 21 and slides along the second sliding groove 219. The projection 312 is provided in the first through hole 220 of the first hinge 21 and is movable in the Y-axis direction in the first through hole 220. The projection 312 is provided with a second inclined edge 315. Specifically, the second side plate 216 is provided with a first guide groove 225 communicated with the second sliding groove 219, and the third side plate 217 is provided with a second guide groove 226 communicated with the second sliding groove 219. The bottom plate 311 is further provided at both sides thereof with a first guide rail 313 and a second guide rail 314. The first guide rail 313 and the second guide rail 314 both extend in the Y-axis direction. The first guide rail 313 is disposed in the first guide groove 225 and slides along the first guide groove 225, and the second guide rail 314 is disposed in the second guide groove 226 and slides along the second guide groove 226, so that the first control slider 31 is slidably coupled to the first hinge 21.

The second control slider 32 has the same structure as the first control slider 31 so that the second control slider 32 is slidably coupled to the second hinge 22.

The spindle mechanism 20 further includes a first elastic member. Opposite ends of the first elastic element respectively abut against the first side plate 215 and the control slider 3. The number of the first elastic members is two, and the first elastic members are respectively denoted as a first sub elastic member 71 and a second sub elastic member 72, wherein the first sub elastic member 71 is disposed in the second sliding slot 219 of the first hinge 21, one end of the first sub elastic member 71 abuts against the first side plate 215 of the first hinge 21, and the other end of the first sub elastic member 71 abuts against the bottom plate 311 of the first control slider 31, so that the first control slider 31 and the first hinge 21 are elastically abutted. The second sub elastic member 72 is disposed in the second sliding groove 219 of the second hinge 22, one end of the second sub elastic member 72 abuts against the first side plate 215 of the second hinge 22, and the other end of the second sub elastic member 72 abuts against the bottom plate 311 of the second control slider 32, so that the second control slider 32 and the second hinge 22 elastically abut.

In the process of switching the flexible display device 1000 from the unfolded state to the folded state, the first transmission slider 51 is moved in the reverse direction (i.e., in the X-axis direction) toward the third side plate 217 of the first hinge 21 by the first rotation arm 43. The first transmission slide block 51 moves to make the first inclined edge 518 abut against the second inclined edge 315 of the first control slide block 31 and push the first control slide block 31 to move towards the rotating shaft base 1; meanwhile, the second transmission slider 52 moves in the opposite direction (i.e. along the X-axis forward direction) toward the third side plate 217 of the second hinge 22 under the action of the second rotation arm 44, the second transmission slider 52 moves to make the first inclined edge 518 abut against the second inclined edge 315 of the second control slider 32 and push the second control slider 32 to move toward the rotation shaft base 1, the first control slider 31 drives the bending portion 102 of the flexible screen 100 to approach toward the center thereof through the first housing 10, and the second control slider 32 drives the bending portion 102 of the flexible screen 100 to approach toward the center thereof through the second housing 30, so as to reduce the tensile deformation of the bending portion 102 in the bending process.

In the process of the flexible display device 1000 from the folded state to the unfolded state, the first transmission slider 51 moves towards the direction (X-axis positive direction) away from the third side plate 217 under the action of the first rotation arm 43, and the movement of the first transmission slider 51 causes the first sub elastic member 71 to apply an acting force to the first control slider 31 and drives the first control slider 31 to slide towards the direction away from the rotation shaft base 1 until there is no interaction force between the second inclined edge 315 of the first control slider 31 and the first inclined edge 518 of the first transmission slider 51; meanwhile, the second transmission slider 52 moves towards the direction (the direction opposite to the X axis) away from the third side plate 217 under the action of the second rotation arm 44, and the movement of the second transmission slider 5 causes the second sub elastic member 72 to apply an acting force to the second control slider 32 and drive the second control slider 32 to slide towards the direction away from the rotation shaft base 1 until there is no interaction force between the second inclined edge 315 of the second control slider 32 and the first inclined edge 518 of the second transmission slider 52, so that the first control slider 31 is balanced in the Y axis direction, and the second control slider 32 is balanced in the positive direction along the Y axis, so that the flexible display device 1000 can maintain its flattened state in the flattened state.

The first transmission slider 51 comprises a plurality of strip-shaped holes 519. The extending direction of the strip-shaped hole 519 intersects with or is perpendicular to the sliding direction (Y-axis direction) of the first control slider 31. The strip shaped holes 519 may extend in the X-axis direction. The plurality of bar holes 519 may correspond to the second side plate 216 and the fourth side plate 218 of the first hinge 21. The spindle mechanism 20 further includes a plurality of links (not shown). The connecting member may be a screw or the like. The connecting member is fixedly connected to the second side plate 216 and the fourth side plate 218 of the first hinge 21 through the strip-shaped hole 519 of the first transmission slider 51, so that the first transmission slider 51 and the first hinge 21 are fixedly connected in the Z-axis direction. When the first transmission slider 51 is moved in the X-axis reverse direction with respect to the first hinge 21 by the first rotation arm 43, the bar-shaped hole 519 of the first transmission slider 51 may be moved in the X-axis positive direction with respect to the link member, in other words, the link member may slide along the bar-shaped hole 519 during the rotation of the first hinge 21.

The structure of the second transmission slider 52 is the same as that of the first transmission slider 51, and the second transmission slider 52 and the first transmission slider 51 are arranged in diagonal symmetry, so that when the second transmission slider 52 moves along the positive direction of the X axis relative to the second hinge 22 under the action of the second transmission arm 44, the strip-shaped hole 519 of the second transmission slider 52 can move along the negative direction of the X axis relative to the connection piece of the second transmission slider 52.

The first transmission slider 51 further comprises at least one guide slot 521. The guide slot 521 extends parallel to the strip-shaped hole 519 of the first side plate 215. The guide groove 521 extends along the X-axis. The support plate (the second side plate 216 and/or the fourth side plate 218 of the first hinge 21) is provided with at least one guide block 227. The guide block 227 is disposed in the guide groove 521 and slides along the guide groove 521 along with the rotation of the first hinge 21. The guide block 227 and the guide groove 521 are disposed such that the first transfer slider 51 is moved along the X-axis by the first rotation arm 43.

Referring to fig. 8, for the first hinge 21, a second elastic element 75 is interposed between the second side plate 216 and the first rotating arm 43. A first engaging groove 432 and a second engaging groove 433 are formed on a side of the first rotating arm 43 facing the second side plate 216. The first engaging groove 432 is close to the spindle base 1 relative to the second engaging groove 433. Accordingly, another second elastic member 75 is interposed between the third side plate 217 and the second rotating arm 44. The second rotating arm 44 is provided with another first engaging groove 432 and another second engaging groove 433 on a side facing the third side plate 217. The first engaging groove 432 is close to the spindle base 1 relative to the second engaging groove 433. When the first rotating arm 43, the second transmission arm 44 and the first hinge 21 rotate to the flat state, one second elastic element 75 is clamped in the first clamping groove 432 of the first rotating arm 43, and the other second elastic element 75 is clamped in the first clamping groove 432 of the second rotating arm 44, so that the fixed point clamping of the rotating shaft mechanism 20 in the flat state is realized. When the first rotating arm 43, the second transmission arm 44 and the first hinge 21 rotate to the folded state, one second elastic member 75 is clamped in the second clamping groove 433 of the first rotating arm 43, and the other second elastic member 75 is clamped in the second clamping groove 433 of the second rotating arm 44, so that the fixed-point clamping of the rotating shaft mechanism 20 in the folded state is realized.

In this embodiment, referring to fig. 10 and 11, the first rotating arm 43 and the second rotating arm 44 are connected by a first synchronous rotating assembly 61, and the third rotating arm 45 and the fourth rotating arm 46 are connected by a second synchronous rotating assembly 62. The second synchronizing rotary member 62 has the same structure as the first synchronizing rotary member 61. The first synchronous rotating assembly 61 includes a pair of first gear arms 63, a pair of second gear arms 64, a pair of third gear arms 65, a first bar gear 66 and a second bar gear 67. The first and second bar gears 66 and 67 are fixed to the spindle base 1. The first bar gear 66 has insections at opposite ends thereof, and the second bar gear 67 has insections at opposite ends thereof. The first bar gear 66, the pair of first gear arms 63, and the second bar gear 67 are sequentially stacked in the X-axis direction. The pair of first gear arms 63 are engaged with each other at opposite ends thereof. One end of the first gear arm 63 is coaxially connected to one end of the first bar gear 66 and one end of the second bar gear 67, and the axial direction thereof is the Z-axis direction. One end of the second gear arm 64 is coaxially connected to the other end of the first bar gear 66 and the other end of the second bar gear 67, and the axial direction thereof is the Z-axis direction. A pair of second gear arms 64 are respectively engaged with opposite ends of the first bar gear 66. A pair of third gear arms 65 are respectively engaged with opposite ends of the second bar gear 67. One end of a second gear arm 64, the other end of the first gear arm 63, and one end of a third gear arm 65 are coaxially connected, and the axial direction thereof is the Z-axis direction. The other end of the second gear arm 64, the other end of the first rotating arm 43, and the other end of the third gear arm 65 are coaxially connected, and the axial direction thereof is the Z-axis direction. One end of the other second gear arm 64, the other end of the second gear arm 64, and one end of the other third gear arm 65 are coaxially connected, and the axial direction thereof is the Z-axis direction. The other end of the second gear arm 64, the second rotating arm 44, and the other end of the third gear arm 65 are coaxially connected, and the axial direction thereof is the Z-axis direction. When the first rotating arm 43 and the second rotating arm 44 rotate under the action of the first shell 10 and the second shell 30, the first rotating arm 43 drives one first gear arm 63 to rotate around the first bar-shaped gear 66, one third gear arm 65 rotates around the second bar-shaped gear 67, the second rotating arm 44 drives the other first gear arm 63 to rotate around the first bar-shaped gear 66, and the other third gear arm 65 rotates around the second bar-shaped gear 67, so that the synchronous rotation of the first shell 10 and the second shell 30 is realized.

The embodiment of the application provides a pivot mechanism 20, collapsible supporting mechanism 200 and flexible display device 1000, can realize that first casing 10 and second casing 30 both sides are rolled over the in-process and are rolled over the book in step according to the same angle, still fold with specific camber, realize rolling over the in-process, the position of flexible screen 100 is controllable, length is controllable, dodge the mode through the design linkage, can avoid flexible screen 100 to swell after receiving the extrusion, make flexible screen 100 straighten in the exhibition state, through designing no interact power between control slider 3 and the transmission slider 5 when flattening, so that flexible screen 100 is rolling over and is opened the back, realize the fuselage and keep preceding position, and can not reverse rolling over and turn over and go back.

The foregoing is a partial description of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A spindle mechanism, comprising:

a rotating shaft base;

one end of the transmission sliding block is connected with the rotating arm in a sliding mode, and the other end of the transmission sliding block is connected to the hinge assembly; when the rotating shaft mechanism is in a folded state, the control slide block is clamped between the transmission slide block and the hinge assembly and is abutted to the transmission slide block under the action of the acting force exerted by the transmission slide block.

2. The spindle mechanism according to claim 1, wherein the control slider is spaced from or in contact with the drive slider when the spindle mechanism is in the flattened state.

3. The hinge mechanism according to claim 1, wherein the transmission slider is provided with a curvilinearly extending slide, and the rotary arm has a slide post that slides along the slide during rotation of the rotary arm.

4. The spindle mechanism according to claim 3, wherein the slide is disposed adjacent to and along a free end of the drive slide, the slide including a first end and a second end disposed opposite to each other, the first end being adjacent to the spindle base relative to the second end, a line between the first end and the second end intersecting a line passing through the free end.

5. The spindle mechanism according to claim 4, wherein the slideway includes a first groove section, a second groove section, and a third groove section sequentially located between the first end and the second end, the first groove section extends along a first track, the second groove section extends along a second track, the third groove section extends along a third track, an included angle between the first track and the edge of the free end is smaller than an included angle between the second track and the edge of the free end, and an included angle between the third track and the edge of the free end is smaller than an included angle between the second track and the edge of the free end.

6. The spindle mechanism according to claim 5, wherein the spool is located in the third slot section when the spindle mechanism is in the flattened state; when the rotating shaft mechanism is folded to a preset angle value, the sliding column is positioned in the second groove section; when the rotating shaft mechanism is in a folded state, the sliding column is located in the first groove section.

7. The hinge mechanism according to any one of claims 1 to 6, wherein the hinge comprises a sliding portion having a circular arc shape, the rotating shaft base is provided with a circular arc-shaped first sliding slot, and the sliding portion is at least partially disposed in the first sliding slot and slides along the first sliding slot.

8. The hinge mechanism according to claim 7, wherein the hinge further includes a first side plate, a second side plate and a third side plate, the first side plate is connected to the sliding portion and located outside the hinge base, the second side plate and the third side plate are respectively connected to two opposite ends of the first side plate, the third side plate, the first side plate and the second side plate surround to form a second sliding slot, and the control slider is located in the second sliding slot and slides along the second sliding slot.

9. The spindle mechanism according to claim 8, further comprising a first elastic member, opposite ends of which abut against the first side plate and the control slider, respectively.

10. The hinge assembly of claim 9, further comprising a fourth side plate opposite the first side plate and connected between the second side plate and the third side plate, the fourth side plate, a portion of the third side plate, a portion of the second side plate, and a portion of the pivot arm forming a support plate for supporting the drive slide; the fourth side plate, the second side plate, the first side plate and the third side plate are arranged at intervals and surround to form a first through hole communicated with the second chute, the control slide block comprises a bottom plate and a convex block arranged on the bottom plate, the bottom plate is contained in the second chute, and the convex block is arranged in the first through hole.

11. The hinge assembly of claim 10, wherein the side of the transmission slider adjacent to the hinge assembly has a first inclined edge extending in a direction intersecting the sliding direction of the control slider; the lug has a second beveled edge opposite the first beveled edge; in the process that the hinge assembly is switched from the flattening state to the folding state, the transmission sliding block moves towards the direction of the third side plate under the action of the rotating arm, the transmission sliding block moves to enable the first inclined edge to move to abut against the second inclined edge of the control sliding block, and the control sliding block is pushed to move towards the rotating shaft base; or, in the process that the hinge assembly is in a folded state to a flattened state, the transmission sliding block moves towards the direction far away from the third side plate under the action of the rotating arm, and the movement of the transmission sliding block enables the first elastic piece to exert acting force on the control sliding block and drives the control sliding block to slide towards the direction far away from the rotating shaft base until no interaction force exists between the second inclined edge of the control sliding block and the first inclined edge of the transmission sliding block.

12. The spindle mechanism according to claim 10, wherein the transmission slider comprises at least one strip-shaped hole, and the extension direction of the strip-shaped hole intersects with or is perpendicular to the sliding direction of the control slider; the pivot mechanism still includes at least one connecting piece, the connecting piece warp strip hole fixed connection the backup pad, the connecting piece is in hinge pivoted in-process is followed the strip hole slides.

13. The hinge mechanism according to claim 12, wherein the driving slider further comprises at least one guiding groove, the extending direction of the guiding groove is parallel to the extending direction of the first side plate and the extending direction of the strip-shaped hole are the same, the supporting plate is provided with at least one guiding block, and the guiding block is arranged in the guiding groove and slides along the guiding groove along with the rotation of the hinge.

14. The spindle mechanism according to claim 8, wherein a second elastic member is provided on a side of the second side plate facing the rotating arm, and a first engaging groove and a second engaging groove are provided on a side of the rotating arm facing the second side plate, the first engaging groove being adjacent to the spindle base relative to the second engaging groove; when the rotating arm and the hinge rotate to be in a flattening state, the second elastic piece is clamped in the first clamping groove of the rotating arm; when the rotating arm and the hinge rotate to a folding state, the second elastic piece is clamped in the second clamping groove of the rotating arm.

15. The hinge assembly as claimed in any one of claims 1 to 6, wherein the hinge assembly includes a first hinge and a second hinge cooperating with each other, the first hinge and the second hinge are rotatably connected to opposite sides of the hinge base, the sliding portion of the first hinge has a first notch and a first protrusion and a second protrusion located on opposite sides of the first notch in the middle of the end portion close to the second hinge, and the sliding portion of the second hinge has a third protrusion and a second notch and a third notch located on opposite sides of the third protrusion in the middle of the end portion close to the first hinge.

16. The hinge mechanism of claim 15, wherein an end surface of the first hinge opposes or intersects an end surface of the second hinge when the first hinge and the second hinge are in a folded state; when the first hinge and the second hinge are in a flattening state, the sliding part of the first hinge and the sliding part of the second hinge are mutually abutted, the first convex tooth penetrates through the second notch and extends out of the second notch, the second convex tooth penetrates through the third notch and extends out of the third notch, and the third convex tooth penetrates through the first notch and extends out of the first notch.

17. The hinge mechanism of claim 15, wherein the number of the control sliders is at least two, and the at least two control sliders include a first control slider and a second control slider, the first control slider and the second control slider are respectively elastically connected to the first hinge and the second hinge, and both the first control slider and the second control slider are used for connecting the housing.

18. The spindle mechanism according to claim 17, wherein the number of the rotating arms is at least two pairs, the at least two pairs include a first rotating arm assembly and a second rotating arm assembly, and the spindle base, the first hinge and the second hinge are respectively disposed between the first rotating arm assembly and the second rotating arm assembly; the first rotating arm assembly comprises a first rotating arm and a second rotating arm which are arranged oppositely, the second rotating arm assembly comprises a third rotating arm and a fourth rotating arm which are arranged oppositely, and the fourth rotating arm and the first rotating arm are arranged diagonally.

19. The spindle mechanism according to claim 18, further comprising at least two sets of synchronous rotating assemblies connected to the spindle base, wherein opposite ends of one set of the synchronous rotating assemblies are connected to the first rotating arm and the second rotating arm, respectively, and opposite ends of the other set of the synchronous rotating assemblies are connected to the third rotating arm and the fourth rotating arm, respectively; the synchronous rotating assembly comprises a pair of first gear arms, a pair of second gear arms, a pair of third gear arms, a first bar-shaped gear and a second bar-shaped gear, wherein the first bar-shaped gear, the pair of first gear arms and the second bar-shaped gear are sequentially overlapped and arranged, the pair of first gear arms are meshed and connected, one end of each first gear arm is coaxially connected with one end of the first bar-shaped gear and one end of the second bar-shaped gear, one end of each second gear arm is coaxially connected with the other end of the first bar-shaped gear and the other end of the second bar-shaped gear, the pair of second gear arms are respectively meshed and connected with the two opposite ends of the first bar-shaped gear, the pair of third gear arms are respectively meshed and connected with the two opposite ends of the second bar-shaped gear, and one end of each second gear arm is coaxially connected with the other end of the first gear arm, One end of one third gear arm is coaxially connected, the other end of one second gear arm, the other end of the first rotating arm and the other end of one third gear arm are coaxially connected, one end of the other second gear arm, the other end of the second gear arm and one end of the other third gear arm are coaxially connected, and the other end of the other second gear arm, the other end of the second rotating arm and the other end of the other third gear arm are coaxially connected.

20. The hinge assembly of claim 7, wherein the hinge base includes a bottom shell and a cover plate covering the bottom shell, the first slot is disposed on the bottom shell, the cover plate has at least one second through hole, and when the hinge assembly is in the flat state, an end of the hinge assembly is located in the second through hole.

21. A bendable support mechanism, comprising a first housing, a second housing and a pivot mechanism as claimed in any one of claims 1 to 20, wherein the first hinge and the second hinge of the pivot mechanism are respectively rotatably connected to two opposite sides of the pivot base, the first control slider and the second control slider of the pivot mechanism are respectively fixedly connected to the first housing and the second housing, and the first rotating arm and the second rotating arm of the pivot mechanism are respectively slidably connected to the first housing and the second housing.

22. A flexible display device comprising a flexible screen and the bendable support mechanism of claim 21, wherein the flexible screen is fixedly connected to the first housing and the second housing.

23. The flexible display device of claim 22, wherein the flexible screen is more taut in a flattened state than in a folded state.