CN114241915B

CN114241915B - Flexible display device

Info

Publication number: CN114241915B
Application number: CN202111580312.0A
Authority: CN
Inventors: 徐涛
Original assignee: Hubei Changjiang New Display Industry Innovation Center Co Ltd
Current assignee: Hubei Changjiang New Display Industry Innovation Center Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2023-08-29
Anticipated expiration: 2041-12-22
Also published as: CN114241915A

Abstract

The application provides a flexible display device, wherein a damping part in the flexible display device has a certain damping force on the relative motion of a first main body and a second main body, so that when the relative motion of the first main body and the second main body is driven, the damping force of the damping part can offset a part of acting force on the first main body or the second main body, so that the driving force is maintained within a preset range, and the flexible display device can be unfolded or folded more gently and uniformly, and the flexible screen is subjected to a smaller and stable acting force. In addition, when the flexible display device accidentally falls down, the impact force between the first main body and the second main body is transmitted to the damping component, and the damping component can absorb part of the impact force, so that the damping component can play a role in damping and dissipating energy, the flexible screen and the flexible display device are protected, and the use reliability, safety and service life of the flexible display device are further improved.

Description

Flexible display device

Technical Field

The application relates to the technical field of display, in particular to a flexible display device.

Background

With the development of flexible screen technology, there is an increasing demand for flexible display devices, which are required not only to have a large-sized display function but also to have the characteristics of easy operation and high reliability in use.

Disclosure of Invention

The application provides a flexible display device with high use reliability.

The application provides a flexible display device, which comprises a first main body, a second main body, a flexible screen and a damping part, wherein the second main body can reciprocate along a first direction relative to the first main body so as to configure the flexible screen to be positioned in a required display area; the damping component is arranged between the first main body and the second main body and is used for providing resistance when the first main body and the second main body move relatively.

When the first main body and the second main body relatively move, the damping component applies a damping force opposite to the movement of the first main body and the second main body, namely the damping component has a certain damping force on the relative movement of the first main body and the second main body, so that when the first main body and the second main body are driven to relatively move, the damping force of the damping component can offset a part of acting force on the first main body or the second main body, so that the driving force is maintained in a preset range, and the flexible display device can be unfolded or folded more gradually and uniformly, and is subjected to a smaller and stable acting force. In addition, when the flexible display device accidentally falls down, the impact force between the first main body and the second main body is transmitted to the damping component, and the damping component can absorb part of the impact force, so that the damping component can play a role in damping and dissipating energy, the flexible screen and the flexible display device are protected, and the use reliability, safety and service life of the flexible display device are further improved.

Optionally, the damping component has at least one damping unit, the damping unit includes a cylinder body, at least one piston and a guide rod, the cylinder body has a sealed cavity for filling fluid medium, each piston separates the sealed cavity into two adjacent cavities, at least one throttling through hole communicating the two adjacent cavities is arranged on the piston, the guide rod is fixedly connected with at least one piston, and at least one end of the guide rod is located outside the sealed cavity.

Optionally, the two axial ends of the guide rod penetrate through the cylinder body, the two ends of the guide rod are exposed out of the cylinder body, and the piston is fixed on a rod section of the guide rod, which is positioned in the sealing cavity.

Optionally, the number of the damping units is one, the number of the pistons includes one or two or more than two, each piston is fixedly connected to the guide rod, one of the cylinder body and the guide rod is fixedly connected with the first main body, and the other is fixedly connected with the second main body;

or the number of the damping units is one, the number of the pistons is two or more, at least one piston is fixed on the guide rod, the other pistons are in floating connection with the guide rod along the axial direction, one of the cylinder body and the guide rod is fixedly connected with the first main body, and the other piston is fixedly connected with the second main body.

Optionally, the damping assembly comprises a damping assembly, the damping assembly comprises a first end and a second end along the axial direction, the damping assembly comprises two damping units which are arranged in parallel and are fixedly connected with a cylinder body, the two damping units are respectively defined as a first damping unit and a second damping unit, the first end of a guide rod of the first damping unit is connected with the first main body, the second end of the guide rod of the second damping unit is connected with the second main body, and the cylinder bodies of the first damping unit and the second damping unit are at least connected with the first main body and the second main body in a floating mode along the axial direction.

Optionally, the damping component includes N damping assemblies, the damping assembly has a first end and a second end along the axial direction, each damping assembly includes two damping units that are connected in parallel and are fixedly connected to the cylinder, the two damping units are respectively defined as a first damping unit and a second damping unit, the first end of the guide rod of the first damping unit of the first stage damping assembly is connected to the first main body, the second end of the guide rod of the second damping unit of the last stage damping assembly is connected to the second main body, wherein the second end of the guide rod of the second damping unit of the N-1 stage damping assembly is fixedly connected to the second end of the guide rod of the first damping unit of the N-th stage damping group, and N is greater than or equal to 2.

Optionally, the damping component includes N damping assemblies and a third damping unit, each damping assembly and the third damping unit have a first end and a second end along an axial direction, each damping assembly includes two damping units connected in parallel and fixedly connected to a cylinder, the two damping units are respectively defined as a first damping unit and a second damping unit, a first end of a guide rod of the first damping unit of the first stage damping assembly is connected to the first main body, a second end of a guide rod of the second damping unit of the last stage damping assembly is connected to a second end of a guide rod of the third damping unit, and the cylinder of the third damping unit is fixedly connected to the second main body, where N is greater than or equal to 1.

Optionally, the quantity of piston is two, is first piston and second piston respectively, the quantity of guide arm is also two, is first guide arm and second guide arm respectively, and wherein first guide arm fixed connection first piston, second guide arm fixed connection second piston, damping unit has first end and second end, the first end of first guide arm passes the cylinder body with first main part is connected, the second end of second guide arm wears out the cylinder body with the second main part is connected, the cylinder body is relative first main part, the second main part floats.

Optionally, the device further comprises a synchronous retraction device fixed on the first main body or the second main body, and a rotating shaft rotatably connected with the second main body, the axial direction of the rotating shaft is perpendicular to the first direction, one end of the flexible screen is fixed on the first main body, the free end bypasses the rotating shaft and is fixed on the synchronous retraction device, and the flexible screen synchronously acts with the second main body under the action of the synchronous retraction device;

or, the flexible screen is wound on the reel, and the extending end of the flexible screen is fixed on the second main body.

Optionally, the synchronous winding and unwinding device comprises a synchronous belt and a power component for winding and unwinding the synchronous belt, and the free end of the synchronous belt is fixedly connected with the free end of the flexible screen.

Optionally, the first body is slidably connected to the second body, and the damping component is located inside a cavity enclosed by the first body and the second body.

Drawings

FIG. 1 is a three-dimensional schematic view of a flexible display device according to an embodiment of the application;

FIG. 2 is a schematic diagram of a flexible display device in a state according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 4 is a schematic view of a fourth embodiment of the present application with a damping member in a first state;

FIG. 5 is a schematic view of the flexible display device of FIG. 4 with the damping member in another state;

FIG. 6 is a schematic view of a damping member in a first state according to a fifth embodiment of the present application;

FIG. 7 is a schematic view of a third embodiment of a damping member according to the present application in a first state;

FIG. 8 is a schematic view of the flexible display device of FIG. 7 with the damping member in another state;

FIG. 9 is a schematic view of a fourth embodiment of a damping member according to the present application in a first state;

FIG. 10 is a schematic view of the flexible display device of FIG. 9 with the damping member in another state;

FIG. 11 is a schematic view of a damping member in a first state according to a fifth embodiment of the present application;

FIG. 12 is a schematic view of the flexible display device of FIG. 11 with the damping member in another state;

fig. 13 is a schematic view showing a damping member in a certain working state according to a sixth embodiment of the present application.

Wherein, the one-to-one correspondence between the reference numerals and the component names in fig. 1 to 13 is as follows:

a first body 1; a second body 2; a flexible screen 3; a damping member 4; a cylinder 41; a piston 42; a throttle through hole 421; a guide rod 43; a rotating shaft 5; a synchronizing device 6; a power member 61, a timing belt 62; a damping unit 40; a damping assembly Z1; a first damping unit 401; a second damping unit 402; a guide rod 4012 of the first damping unit; a guide bar 4022 of the second damping unit; a partition 4013; a first sealed cavity 401a; a second sealed cavity 402a; a first piston 42'; a second piston 42"; a first guide bar 43'; a second guide bar 43".

Detailed Description

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are merely for convenience of description of the technology, and are not meant to indicate or imply that the apparatus or element to be referred to must have a specific direction, a specific direction configuration and operation, and thus the limitation of the present application is not to be construed. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Hereinafter, the cross section refers to a plane perpendicular to the axis of the rotation shaft.

The technical solutions and technical effects herein will be described in detail with reference to the accompanying drawings and specific embodiments so that those skilled in the art can fully understand the present application.

Referring to fig. 1 to 3, fig. 1 is a three-dimensional schematic diagram of a flexible display device according to an embodiment of the application; FIG. 2 is a schematic diagram of a flexible display device in a state according to an embodiment of the present application; fig. 3 is a schematic cross-sectional view of A-A of fig. 1.

The flexible display device provided by the application comprises a first main body 1, a second main body 2, a flexible screen 3 and a damping part 4.

Wherein the second body 2 is reciprocally movable in a first direction with respect to the first body 1, that is, the first body 1 and the second body 2 are reciprocally movable in the first direction, so as to configure the flexible screen 3 to form a desired display area. One end of the flexible screen 3 is directly or indirectly fixed to the first body 1, and the other end is directly or indirectly fixed to the second body 2, so that when the second body 2 moves relatively to the first body 1, one end of the flexible screen 3 can be unfolded or folded relatively to the other end, so that a display area meeting the use requirement can be obtained. The first body 1 and the second body 2 mainly provide mounting bases for other components, and the specific structure may be dependent on the specific application environment. Here, the first body 1 and the second body 2 are shown to be of shell structures, the openings of the two are opposite, a part of the second body 2 is slidably arranged in the inner cavity of the first body 1, a part of the flexible screen 3 is stored in the inner cavity of the first body 1 and the inner cavity of the second body 2, and when the second body 2 is far away from the first body 1, the flexible screen 3 can be pulled out of the inner cavity. Of course, the mechanism of the first body 1 and the second body 2 is not limited to that described herein, but may be other structures.

The damping member 4 of the flexible display device according to the present application is disposed between the first body 1 and the second body 2 to provide a resistance force when the first body 1 and the second body 2 move relatively, that is, when the first body 1 and the second body 2 move relatively, the damping member 4 applies a damping force opposite to the movement of the first body 1 and the second body 2, that is, the damping member 4 has a certain damping force to the relative movement of the first body 1 and the second body 2, so that when the first body 1 and the second body 2 are driven to move relatively, the damping force of the damping member 4 can offset a part of the acting force acting on the first body 1 or the second body 2 to maintain the driving force within a predetermined range, so that the flexible display device can be unfolded or folded more gently and uniformly, and the flexible screen 3 is subjected to a relatively small and stable acting force. In addition, when the flexible display device accidentally falls down, the impact force between the first main body 1 and the second main body 2 is transmitted to the damping part 4, and the damping part 4 can absorb part of the impact force as well, so that the flexible display device can play a role in damping and dissipating energy, and the flexible screen 3 and the flexible display device are protected.

There are various forms of specific construction of the damping member 4, and several specific embodiments are presented herein.

Referring to fig. 4 and 5, fig. 4 is a schematic view illustrating a damping member in a first state according to a fourth embodiment of the present application; fig. 5 is a schematic view showing a structure in which a damping member is in another state in the flexible display device shown in fig. 4.

In a first embodiment, the damping member has at least one damping unit 40, the damping unit 40 comprising a cylinder 41, at least one piston 42 and a guide rod 43, the cylinder 41 having a sealed cavity for filling with a fluid medium, which may comprise a viscous fluid medium, such as silicone oil or the like, but may also be a non-viscous fluid, such as water or gas or the like. The number of pistons and guide rods may be one or more, wherein fig. 4 to 5 show a specific manner in which the damping unit 40 includes one piston 42 and one guide rod 43. Each piston 42 isolates the sealed cavity into two adjacent chambers, at least one throttling through hole 421 for communicating the two adjacent chambers is further arranged on the piston 42, namely, the chambers located on two sides of the piston 42 can be communicated through the throttling through holes 421 arranged on the piston 42, the structure and the number of the throttling through holes 421 can be determined according to specific application environments, and the structure and the number of the throttling through holes are not disclosed herein, so that understanding and implementation of the technical scheme in the field are not affected by those skilled in the art.

Each guide rod 43 is fixedly connected to at least one piston 42, and at least one end portion of the guide rod 43 is located outside the sealing chamber.

For providing only one damping unit 40, one of the cylinder 41 and the guide rod 43 may be fixedly connected to the first body 1, and the other is fixedly connected to the second body 2. In which fig. 4 and 5 show that the cylinder 41 is fixedly connected to the first body 1, the guide rod 43 is fixedly connected to the second body 2, and fig. 4 and 5 show that the fixing point of the guide rod 43 to the second body 2 is P.

In this embodiment, a relatively stable damping force can be obtained through the fluid throttling flowing effect, so that the gentle uniform motion of the second main body 2 relative to the first main body 1 is realized, and the shock absorption effect is relatively good.

Of course, in order to increase the damping force of the damping unit 40, the present application further provides a second embodiment in which two or more pistons 42 may be disposed inside the cylinder 41, and referring to fig. 6, fig. 6 shows a specific embodiment in which two pistons 42 are disposed inside the cylinder, and the two pistons 42 are fixedly connected to the guide rod 43 and are disposed on the guide rod 43 at intervals in the axial direction. A throttle through hole is arranged on each piston. In this embodiment, two or more pistons 42 are fixed to the guide rod 43, so that the throttle resistance is increased and a large damping force can be generated.

Of course, the guide rod 43 may be fixedly connected to only one of the pistons 42 and axially floatingly connected to the other pistons, and the effect of providing a predetermined damping force can be achieved as well.

In order to minimize the design structure of the damping unit 40 and simplify the control logic, in one example, both ends of the guide rod 43 in the axial direction penetrate the cylinder 41, both ends of the guide rod 43 are exposed to the outside of the cylinder 41, and the piston 42 is connected to the rod section of the guide rod 43 located in the seal chamber.

As will be appreciated from fig. 4 and 5, the guide rods 43 occupy substantially the same volume of the cavities on both sides of the piston 42 during the entire movement, so that the change in volume of the cavities on both sides of the piston 42 is the same at any time, and the balance inside the damping unit can be achieved without providing additional components for control.

On the basis of the above embodiments, the present application also provides specific embodiments with two or more damping units, see the following description.

Referring to fig. 7 and 8, fig. 7 is a schematic view illustrating a damping member in a first state according to a third embodiment of the present application; fig. 8 is a schematic view showing a structure in which a damping member is in another state in the flexible display device shown in fig. 7.

In a third specific example, the damping component includes a damping assembly Z1, where the damping assembly Z1 has a first end A1 and a second end A2 along an axial direction, the damping assembly Z1 includes two damping units that are disposed in parallel and are fixedly connected to a cylinder, and for simplicity of description of the technical solution, the two damping units are defined herein as a first damping unit 401 and a second damping unit 402, respectively, a first end of a guide rod 4012 of the first damping unit 401 is connected to the first body 1, a second end of a guide rod 4022 of the second damping unit 402 is connected to the second body 2, and the cylinders of the first damping unit 401 and the second damping unit 402 are at least floatingly connected to the first body 1 and the second body 2 along the axial direction. Fig. 7 and 8 show an example in which the cylinder of the first damping unit 401 and the cylinder of the second damping unit 402 are of an integral structure, that is, the cylinder of the first damping unit 401 and the cylinder of the second damping unit 402 are located in the same cylinder 4011, the inside of the cylinder 4011 is isolated into a first sealing cavity 401a and a second sealing cavity 402a by a partition 4013, a guide rod 4012 penetrates the first sealing cavity 401a and is fixedly connected with a piston located in the first sealing cavity 401a, and a guide rod 4022 penetrates the second sealing cavity 402a and is fixedly connected with a piston located in the second sealing cavity 402 a.

Of course, the cylinders of the first damping unit 401 and the second damping unit 402 may be independently disposed and fixed as a whole by a fixed connection.

By arranging the damping units in parallel in this embodiment, the movement stroke of the second body 2 can be doubled or more without increasing the length of the cylinder, as compared with the case where only one damping unit is provided.

As is apparent from the above description, as long as the flexible display device has a sufficient space in the thickness direction, a plurality of damping assemblies can be connected in parallel as much as possible to obtain a displacement of the second body 2 as much as possible with respect to the first body 1, and several other embodiments of damping members are given below.

Referring to fig. 9 and 10, fig. 9 is a schematic view illustrating a damping member in a first state according to a fourth embodiment of the present application; fig. 10 is a schematic view showing a structure in which a damping member is in another state in the flexible display device shown in fig. 9.

In a fourth specific example, the damping component includes N damping assemblies, where N is greater than or equal to 2, and as understood in conjunction with fig. 9, fig. 9 shows a specific example in which the damping component includes two damping assemblies, each of which includes two damping units connected in parallel and fixedly to a cylinder, the two damping units are respectively defined as a first damping unit 401 and a second damping unit 402, each damping assembly may be positioned according to a connection order as a first stage damping assembly Z1 and a second stage damping assembly Z2, a first end A1 of a guide rod 4012 of the first damping unit 401 of the first stage damping assembly Z1 is connected to the first main body 1, a connection point P1, a second end A2 of a guide rod 2 of the second damping unit 402 of the first stage damping assembly Z1 is connected to a second end A2 of the guide rod 401 of the second stage damping assembly Z2, a second end A2 of the guide rod 4012 of the second damping unit 402 of the second stage damping assembly Z2 is connected to the second main body 4022, and a connection point P2 of the second guide rod 4012 of the second damping unit 402 of the second stage damping assembly Z2 is connected to the second main body 4022.

Of course, for the case that N is greater than 2, the first end of the guide rod of the first damping unit 401 of the first stage damping assembly Z1 is connected to the first body 1, and the second end of the guide rod of the second damping unit 402 of the last stage damping assembly is connected to the second body 2, wherein the second end of the guide rod of the second damping unit of the N-1 stage damping assembly is fixedly connected to the second end of the guide rod of the first damping unit 401 of the N-stage damping assembly.

Of course, the second end of the guide rod of the second damping unit of the upper stage damping assembly may also be fixedly connected to the first end of the guide rod of the first damping unit of the lower stage damping assembly. It will be appreciated in connection with the case where two damping assemblies are provided in fig. 9, that the second end of the guide rod of the second damping unit 402 of the first stage damping assembly Z1 may be fixedly connected to the first end of the guide rod of the first damping unit 401 of the second stage damping assembly Z2.

On the basis of the above-mentioned arrangement of the damping assemblies, the present application further provides a specific embodiment of arranging N damping assemblies and a third damping unit, as will be understood with reference to fig. 11 and 12.

FIG. 11 is a schematic view of a damping member in a first state according to a fifth embodiment of the present application; fig. 12 is a schematic view showing a structure in which a damping member is in another state in the flexible display device shown in fig. 11.

In the fifth embodiment, each of the damping assemblies and the third damping unit 40 also has a first end A1 and a second end A2 along the axial direction, one damping assembly Z1 and one third damping unit 40 are shown in fig. 11 and 12, the damping assembly Z1 includes two damping units connected in parallel and fixedly connected to a cylinder, the two damping units are respectively defined as a first damping unit 401 and a second damping unit 402, the first end A1 of a guide rod 4012 of the first damping unit 401 is connected to the first body 1, the guide rod 4022 of the second damping unit 402 is connected to the guide rod 43 of the third damping unit 40, and the cylinder of the third damping unit 40 is fixedly connected to the second body 2. Wherein a guide bar 4022 is shown in fig. 11 as being connected to a second end of the guide bar 43 of the third damping unit 40. Of course, the guide bar 4022 may also be connected to the first end of the guide bar 43 of the third damping unit 40.

For a damper assembly comprising two or more damper assemblies, the connection relationship of the damper assembly and the third damper unit may be set as follows: the first end of the guide rod 4012 of the first damping unit 401 of the first-stage damping component Z1 is connected with the first main body 1, the second end of the guide rod of the second damping unit of the last-stage damping component is connected with the second end of the guide rod of the third damping unit 40, and the cylinder body of the third damping unit 40 is fixedly connected with the second main body 2.

The above embodiments mainly describe several specific embodiments mainly comprising two pistons connected in parallel, and of course, the damping unit may be arranged as follows.

Referring to fig. 13, fig. 13 is a schematic view illustrating a damping member in a certain working state according to a sixth embodiment of the present application.

In a sixth specific embodiment, the number of pistons is two, namely a first piston 42' and a second piston 42", the number of guide rods is also two, namely a first guide rod 43' and a second guide rod 43", wherein the first guide rod 42' is fixedly connected with the first piston 42', the second guide rod 43 "is fixedly connected with the second piston 42", the damping unit has a first end and a second end, the first end of the first guide rod 42' passes through the cylinder body to be connected with the first main body 1, the second end of the second guide rod 43 "passes through the cylinder body to be connected with the second main body 2, and the cylinder body floats relative to the first main body 1 and the second main body 2 at least along the axial direction.

Of course, when the first guide rod 43' and the second guide rod 43″ penetrate the cylinder, the first piston 42' and the second piston 42″ may be provided with passages through which the second piston 42″ and the first piston 42' penetrate.

The damping unit of the structure has higher motion stability and can provide larger damping force.

Referring to fig. 3 again, in order to further improve the stability of the flexible screen 3 in unfolding and folding, the flexible display device in the above embodiments may further include a synchronous folding device 6 fixed on the first body 1 or the second body 2, and a rotating shaft 5 rotatably connected to the second body 2, wherein an axial direction of the rotating shaft 5 is perpendicular to the first direction, one end of the flexible screen 3 is fixed on the first body 1, a free end bypasses the rotating shaft 5 and is fixed on the synchronous folding device, and the flexible screen 3 moves synchronously with the second body 2 under the action of the synchronous folding device.

Of course, the arrangement of the flexible screen 3 is not limited to the above description, and may be set as follows: the first main body 1 is rotationally connected with a scroll, the flexible screen 3 is wound on the scroll, the extending end of the flexible screen 3 is fixed on the second main body 2, and when the second main body 2 moves relatively to the first main body 1 in a reciprocating mode, the flexible screen 3 can be wound on the scroll or pulled out from the scroll. Although not shown, the understanding and implementation by those skilled in the art are not hindered.

In a specific example, the synchronous retraction device in the above embodiment includes a synchronous belt 62 and a power member 61 for retracting the synchronous belt 62, and a free end of the synchronous belt is fixedly connected to a free end of the flexible screen 3. The power component may be a motor, but is certainly not limited to a motor, and may be other components.

As described above, the first body 1 and the second body 2 may be a housing structure, which enclose a cavity, and the damping member may be located inside the cavity enclosed by the first body 1 and the second body 2. The device is beneficial to compact structure, protecting the damping part and prolonging the service life of the damping part.

The other parts of the flexible display device are referred to in the prior art, and are not described herein.

The flexible display device provided by the application is described in detail above. The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims

1. A flexible display device comprising a first body, a second body, a flexible screen and a damping member, the second body being reciprocally movable relative to the first body in a first direction to configure the flexible screen in a desired display area; the damping component is arranged between the first main body and the second main body and is used for providing resistance force when the first main body and the second main body move relatively; the damping component is provided with at least one damping unit, the damping unit comprises a cylinder body, at least one piston and a guide rod, the cylinder body is provided with a sealing cavity for filling fluid medium, each piston isolates the sealing cavity into two adjacent cavities, the piston is provided with at least one throttling through hole communicated with the two adjacent cavities, the guide rod is fixedly connected with at least one piston, and at least one end part of the guide rod is positioned outside the sealing cavity;

the damping component comprises N damping assemblies and a third damping unit, each damping assembly and each third damping unit are provided with a first end and a second end along the axial direction, each damping assembly comprises two damping units which are connected in parallel and fixedly connected with a cylinder body, the two damping units are respectively defined as a first damping unit and a second damping unit, the first end of a guide rod of the first damping unit of the first-stage damping assembly is connected with the first main body, the second end of a guide rod of the second damping unit of the last-stage damping assembly is connected with the second end of the guide rod of the third damping unit, and the cylinder body of the third damping unit is fixedly connected with the second main body, wherein N is more than or equal to 1.

2. The flexible display device according to claim 1, wherein both end portions of the guide rod in the axial direction penetrate the cylinder, both end portions of the guide rod are exposed to the outside of the cylinder, and the piston is fixed to a rod section of the guide rod in the seal chamber.

3. The flexible display device according to claim 2, wherein the number of the pistons is two, namely a first piston and a second piston, the number of the guide rods is also two, namely a first guide rod and a second guide rod, wherein the first guide rod is fixedly connected with the first piston, the second guide rod is fixedly connected with the second piston, the damping unit is provided with a first end and a second end, the first end of the first guide rod penetrates through the cylinder body to be connected with the first main body, the second end of the second guide rod penetrates through the cylinder body to be connected with the second main body, and the cylinder body floats relative to the first main body and the second main body.

4. A flexible display device according to any one of claims 1 to 3, further comprising a synchronous retraction device fixed to the first body or the second body, and a rotation shaft rotatably connected to the second body, an axial direction of the rotation shaft being perpendicular to the first direction, one end of the flexible screen being fixed to the first body, and a free end being fixed to the synchronous retraction device around the rotation shaft, the flexible screen being synchronously operated with the second body by the synchronous retraction device.

5. The flexible display device of claim 4, wherein the synchronous retraction device comprises a synchronous belt and a power component for retracting the synchronous belt, and a free end of the synchronous belt is fixedly connected with a free end of the flexible screen.

6. A flexible display device as claimed in any one of claims 1 to 3, further comprising a spool rotatably connected to the first body, the flexible screen being wound around the spool, the extended end of the flexible screen being secured to the second body.

7. A flexible display device as claimed in any one of claims 1 to 3, wherein the first body and the second body are slidably connected, and the damping member is located inside a cavity defined by the first body and the second body.