CN114241915A

CN114241915A - Flexible display device

Info

Publication number: CN114241915A
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: 2022-03-25
Anticipated expiration: 2041-12-22
Also published as: CN114241915B

Abstract

The invention provides a flexible display device, wherein a damping part in the flexible display device has certain damping force to the relative motion of a first main body and a second main body, so that when the first main body and the second main body are driven to move relatively, the damping force of the damping part can counteract a part of acting force acting on the first main body or the second main body, and the driving force is maintained in a preset range, so that the flexible display device can be unfolded or folded smoothly and uniformly, and a flexible screen is subjected to smaller and stable acting force. In addition, when the flexible display device falls down accidentally, the impact force between the first main body and the second main body is transmitted to the damping part, and the damping part can absorb part of the impact force, so that the damping and energy dissipation functions can be achieved, 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 invention relates to the technical field of display, in particular to a flexible display device.

Background

With the development of flexible screen technology, people have made higher and higher requirements on flexible display devices, which are required to have not only a large-size display function, but also characteristics of easy operation and high reliability in use.

Disclosure of Invention

The invention aims to provide a flexible display device with high use reliability.

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

When the first body and the second body move relatively, the damping part applies a damping force opposite to the movement of the first body and the second body, namely the damping part has a certain damping force to the relative movement of the first body and the second body, so that when the first body and the second body are driven to move relatively, the damping force of the damping part can counteract a part of acting force acting on the first body or the second body, and the driving force is maintained in a preset range, therefore, the flexible display device can be unfolded or folded smoothly and uniformly, and the flexible screen is subjected to a smaller and stable acting force at the moment. In addition, when the flexible display device falls down accidentally, the impact force between the first main body and the second main body is transmitted to the damping part, and the damping part can absorb part of the impact force, so that the damping and energy dissipation functions can be achieved, 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, at least one piston, and a guide rod, the cylinder has a sealed cavity for filling with fluid medium, each piston separates the sealed cavity into two adjacent chambers, at least one throttling through hole communicating the two adjacent chambers is provided 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, two end portions of the guide rod along the axial direction penetrate through the cylinder body, the two end portions of the guide rod are exposed outside the cylinder body, and the piston is fixed to a rod section of the guide rod, which is located in the sealed cavity.

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

Optionally, the damping assembly comprises a damping assembly, the damping assembly is provided with a first end and a second end along the axial direction, the damping assembly comprises two damping units which are arranged 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 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 body of the first damping unit and the cylinder body of the second damping unit are in floating connection with the first main body and the second main body at least along the axial direction.

Optionally, the damping component includes N damping assemblies, each damping assembly includes two damping units that are connected in parallel and fixedly connected to the 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 the second main body, a second end of a guide rod of the second damping unit of the N-1 th stage damping assembly is fixedly connected to a second end of a guide rod of the first damping unit of the N-th stage damping assembly, where N is greater than or equal to 2.

Optionally, the damping component includes N damping assemblies and a third damping unit, each of the damping assemblies and the third damping unit has a first end and a second end along an axial direction, each of the damping assemblies 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, 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 number of the pistons is two, and the pistons are respectively a first piston and a second piston, the number of the guide rods is also two, and the guide rods are respectively 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 out of the cylinder body to be connected with the second main body, and the cylinder body is floating relative to the first main body and the second main body.

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

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

Optionally, the synchronous retraction device comprises a synchronous belt and a power component for retracting 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 and the second body are slidably connected, and the damping member is located inside a cavity enclosed by the first body and the second body.

Drawings

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

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

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

FIG. 4 is a schematic view of a damping member in a first state according to a fourth embodiment of the present invention;

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 invention;

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

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 damping member in a first state according to a fourth embodiment of the present invention;

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 invention;

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 of a damping member in an operating condition according to a sixth embodiment of the present invention.

Wherein, the one-to-one correspondence between the reference numbers and the names of the components 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 synchronization device 6; a power unit 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 rod 4022 of the second damping unit; a partition 4013; a first capsule 401 a; a second capsule 402 a; a first piston 42'; a second piston 42 "; a first guide bar 43'; and a second guide bar 43 ".

Detailed Description

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for the convenience of description of the technical simplicity, and do not indicate or imply that the referred devices or elements must have a specific orientation, a specific orientation configuration and operation, and thus, the present invention is not to be construed as being limited. 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 means a plane perpendicular to the axis of the rotating shaft.

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

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

The flexible display device provided by the present application comprises a first body 1, a second body 2, a flexible screen 3 and a damping member 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 on the first main body 1, and the other end is directly or indirectly fixed on the second main body 2, so that when the second main body 2 moves relative to the first main body 1, one end of the flexible screen 3 can be unfolded or folded relative to the other end to obtain a display area meeting the use requirement. The first body 1 and the second body 2 mainly provide a mounting base for other components, and the specific structure may be determined according to the specific application environment. It shows herein that first main part 1 and second main part 2 are shell structures, and the opening of the two is relative, and the partial slip of second main part 2 sets up in the inner chamber of first main part 1, and the inner chamber of first main part 1 and second main part 2 is saved in the part of flexible screen 3, and when second main part 2 kept away from first main part 1, can pull out the inner chamber with flexible screen 3. Of course, the mechanism of the first body 1 and the second body 2 is not limited to that described herein, and may have other configurations.

The damping member 4 of the flexible display device in the present invention is disposed between the first body 1 and the second body 2, for providing resistance to relative movement of the first body 1 and the second body 2, that is, when the first body 1 and the second body 2 are moved relative to each other, the damping part 4 exerts a damping force opposing the movement of the first body 1 and the second body 2, that is to say the damping part 4 has a certain damping force against the relative movement of the first body 1 and the second body 2, thus, when the first body 1 and the second body 2 are driven to move relatively, the damping force of the damping member 4 can counteract a part of the acting force acting on the first body 1 or the second body 2, so that the driving force is maintained within a predetermined range, therefore, the flexible display device can be unfolded or folded smoothly and uniformly, and the flexible screen 3 is subjected to smaller and stable acting force. In addition, when the flexible display device is accidentally dropped, 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 also absorb part of the impact force, so that the shock absorption and energy dissipation functions can be realized, and the flexible screen 3 and the flexible display device can be protected.

The specific structure of the damping member 4 can be in various forms, and several specific embodiments are given below.

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

In the first embodiment, the damping member has at least one damping unit 40, the damping unit 40 includes a cylinder 41, at least one piston 42 and a guide rod 43, the cylinder 41 has a sealed cavity, the sealed cavity is used for filling fluid medium, the fluid medium can include viscous fluid medium, such as silicon oil and the like, and certainly can be non-viscous fluid, such as water or gas and the like. The number of the piston and the guide rod 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 separates the sealed cavity into two adjacent chambers, at least one throttling through hole 421 for communicating the two adjacent chambers is further provided on the piston 42, that is, the chambers located on both sides of the piston 42 can be communicated through the throttling through holes 421 provided on the piston 42, the structure and number of the throttling through holes 421 can be determined according to the specific application environment, and the structure and number of the throttling through holes are not disclosed herein, which does not affect the understanding and implementation of the technical solution of the present disclosure by those skilled in the art.

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

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

In this embodiment, a relatively stable damping force can be obtained through the fluid throttling flow effect, so that the second main body 2 can smoothly move at a uniform speed relative to the first main body 1, and the shock absorption effect is relatively good.

Of course, in order to increase the damping force of the damping unit 40, the present invention further provides a second embodiment, in which two or more pistons 42 can be disposed inside the cylinder 41, please refer to fig. 6, fig. 6 shows an embodiment in which two pistons 42 are disposed inside the cylinder, and both pistons 42 and the guide rods 43 are fixedly connected and are axially spaced on the guide rods 43. Each piston is provided with a throttling through hole. 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 with only one of the pistons 42, and may be connected with the other pistons in a floating manner along the axial direction, and the effect of providing the predetermined damping force can also be achieved.

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 through the cylinder 41, both ends of the guide rod 43 are exposed outside the cylinder 41, and the piston 42 is connected to the rod section of the guide rod 43 located in the sealed cavity.

Referring to fig. 4 and 5, it can be understood that the volume of the cavities on both sides of the piston 42 occupied by the guide rods 43 is approximately the same during the whole movement, so that the change of the volume of the cavities on both sides of the piston 42 is the same at any time, and the balance in the damping unit can be realized without arranging other additional components for control.

On the basis of the above embodiments, the present invention also provides specific embodiments having two or more damping units, please refer to 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 invention; fig. 8 is a schematic view of the flexible display device of fig. 7 with the damping member in another state.

In a third specific example, the damping part includes one damping assembly Z1, the damping assembly Z1 has a first end a1 and a second end a2 along the axial direction, the damping assembly Z1 includes two damping units which are arranged in parallel and fixedly connected with a cylinder, for simplicity of description of the technical solution, the two damping units are respectively defined as a first damping unit 401 and a second damping unit 402, a first end of a guide rod 4012 of the first damping unit 401 is connected with the first main body 1, a second end of a guide rod 4022 of the second damping unit 402 is connected with the second main body 2, and cylinders of the first damping unit 401 and the second damping unit 402 are in floating connection with the first main body 1 and the second main body 2 at least 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 a unitary structure, that is, the cylinder of the first damping unit 401 and the cylinder of the second damping unit 402 are located inside the same cylinder 4011, the inside of the cylinder 4011 is separated into a first sealed chamber 401a and a second sealed chamber 402a by a partition 4013, a guide rod 4012 penetrates the first sealed chamber 401a and is fixedly connected to a piston located inside the first sealed chamber 401a, and a guide rod 4022 penetrates the second sealed chamber 402a and is fixedly connected to a piston located inside the second sealed chamber 402 a.

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

Compared with the case where only one damping unit is provided, the damping units are arranged in parallel in this embodiment, so that the second body 2 can have twice or more movement strokes without increasing the length of the cylinder.

As can be seen from the above description, as long as the flexible display device has enough space in the thickness direction, it is possible to connect a plurality of damping members in parallel as much as possible to obtain as large a displacement as possible of the second body 2 with respect to the first body 1, and several other embodiments of the damping member 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 invention; fig. 10 is a schematic view of the flexible display device of fig. 9 with the damping member in another state.

In a fourth specific example, the damping means comprises N damping assemblies, where N is greater than or equal to 2, as understood in connection with fig. 9, fig. 9 shows a specific example where the damping means comprises two damping assemblies, each damping assembly having a first end a1 and a second end a2 in the axial direction, each damping assembly comprising two damping units connected in parallel and fixedly connected by cylinders, defined as a first damping unit 401 and a second damping unit 402, respectively, each damping assembly being positionable, according to the connection sequence, as a first stage damping assembly Z1 and a second stage damping assembly Z2, the first end a1 of the guide rod 4012 of the first damping unit 401 of the first stage damping assembly Z1 being connected to the first body 1, the connection point being P1, the second end a2 of the guide rod 4022 of the second damping unit 402 of the first stage damping assembly Z1 being connected to the second end a2 of the guide rod 4012 of the second stage damping assembly Z2 being connected to the second end a2 of the guide rod 4012 of the first damping unit 401 of the second stage damping assembly Z2, the second end of the guide 4022 of the second damping unit 402 of the second stage damping assembly Z2 is connected to the second body 2 at a connection point P2.

Of course, in 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 can also be fixedly connected with the first end of the guide rod of the first damping unit of the lower stage damping assembly. As will be appreciated in connection with the provision of two damping assemblies in FIG. 9, the second ends of the guide rods of the second damping unit 402 of the first stage damping assembly Z1 may be fixedly attached to the first ends of the guide rods of the first damping unit 401 of the second stage damping assembly Z2.

On the basis of the above arrangement of the damping assemblies, the present invention further provides a specific embodiment of arranging N damping assemblies and a third damping unit, which is 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 invention; fig. 12 is a schematic view of the flexible display device of fig. 11 with the damping member in another state.

In the fifth embodiment, each damping assembly and the third damping unit 40 also have 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 comprises two damping units which are connected in parallel and fixedly connected by cylinders, the two damping units are respectively defined as a first damping unit 401 and a second damping unit 402, the first end a1 of the guide rod 4012 of the first damping unit 401 is connected with the first main body 1, the guide rod 4022 of the second damping unit 402 is connected with the guide rod 43 of the third damping unit 40, and the cylinder of the third damping unit 40 is fixedly connected with the second main body 2. Wherein the connection of the guide rod 4022 with the second end of the guide rod 43 of the third damping unit 40 is shown in fig. 11. Of course, the guide rod 4022 may be connected to the first end of the guide rod 43 of the third damping unit 40.

For the case of including two or more damping assemblies, the connection relationship between the damping assembly and the third damping 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 assembly Z1 is connected to the first main body 1, the second end of the guide rod of the second damping unit of the last stage damping assembly is connected to the second end of the guide rod of the third damping unit 40, and the cylinder of the third damping unit 40 is fixedly connected to the second main body 2.

The above embodiments mainly describe several embodiments by connecting two pistons in parallel, but the damping unit may be configured as follows.

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

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

Of course, when the first and second guide rods 43 ', 43 "penetrate the cylinder, the first and second pistons 42 ', 42" may be provided with passages through which the second and first pistons 42 ', 42 "pass.

The damping unit of the structure has high motion stability and can provide large damping force.

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

Of course, the arrangement of the flexible screen 3 is not limited to the above description, and may be arranged as follows: rotate on the first main part 1 and be connected with the spool, flexible screen 3 twines in the spool, and the end that stretches out of flexible screen 3 is fixed in second main part 2, and when second main part 2 was the relative reciprocating motion of first main part 1, flexible screen 3 can be rolled up in the spool or pull out from the spool. This document, although not drawn, does not hinder understanding and implementation by a person skilled in the art.

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 not limited to a motor, and may also be other components.

As mentioned above, the first body 1 and the second body 2 may be shell structures enclosing a cavity, and the damping member may be located inside the cavity enclosed by the first body 1 and said second body 2. Therefore, the device is beneficial to compact structure, and is beneficial to protecting the damping part and prolonging the service life of the damping part.

Other structures of the flexible display device are referred to in the prior art, and are not described in detail herein.

The flexible display device provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

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 moveable 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 body and the second body and used for providing resistance when the first body and the second body move relatively.

2. The flexible display device according to claim 1, wherein the damping member has at least one damping unit, the damping unit includes a cylinder, at least one piston, and a guide rod, the cylinder has a sealed cavity for filling fluid medium, each piston separates the sealed cavity into two adjacent chambers, the piston is provided with at least one throttle through hole for communicating the two adjacent chambers, 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.

3. The flexible display device according to claim 2, wherein two end portions of the guide rod in the axial direction penetrate through the cylinder, the two end portions of the guide rod are exposed outside the cylinder, and the piston is fixed to a rod section of the guide rod located in the sealed cavity.

4. The flexible display device according to claim 2 or 3, wherein the number of the damping units is one, the number of the pistons includes one or two or more, each of the pistons is fixedly connected to the guide rod, one of the cylinder and the guide rod is fixedly connected to the first body, and the other is fixedly connected to the second body;

5. The flexible display device according to claim 2 or 3, comprising a damping assembly having a first end and a second end along an axial direction, wherein the damping assembly comprises two damping units disposed in parallel and fixedly connected with 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 is connected with the first main body, a second end of the guide rod of the second damping unit is connected with the second main body, and the cylinders of the first damping unit and the second damping unit are in floating connection with the first main body and the second main body at least along the axial direction.

6. The flexible display device according to claim 2 or 3, wherein the damping member comprises N damping assemblies, each damping assembly has a first end and a second end along the axial direction, each damping assembly comprises two damping units connected in parallel and 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-stage damping assembly, wherein N is greater than or equal to 2.

7. The flexible display device according to claim 2 or 3, wherein the damping member comprises N damping assemblies and a third damping unit, each of the damping assemblies and the third damping unit has a first end and a second end along an axial direction, each of the damping assemblies comprises two damping units which are connected in parallel and fixedly connected by 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 with the first main body, a second end of a guide rod of the second damping unit of the last stage damping assembly is connected with a second end of a guide rod of the third damping unit, and a cylinder of the third damping unit is fixedly connected with the second main body, wherein N is greater than or equal to 1.

8. The flexible display device according to any one of claims 2 to 4, wherein the number of the pistons is two, and the number of the guide rods is also two, and the guide rods are a first guide rod and a second guide rod, respectively, wherein the first guide rod is fixedly connected to the first piston, the second guide rod is fixedly connected to the second piston, the damping unit has a first end and a second end, the first end of the first guide rod passes through the cylinder body to be connected to the first main body, the second end of the second guide rod passes through the cylinder body to be connected to the second main body, and the cylinder body floats relative to the first main body and the second main body.

9. The flexible display device according to any one of claims 1 to 8, further comprising a synchronous retraction device fixed to the first body or the second body, and a rotating shaft rotatably connected to the second body, wherein an axial direction of the rotating shaft is perpendicular to the first direction, one end of the flexible screen is fixed to the first body, a free end of the flexible screen bypasses the rotating shaft and is fixed to the synchronous retraction device, and the flexible screen synchronously moves with the second body under the action of the synchronous retraction device;

10. The flexible display device of claim 9, 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.

11. The flexible display device of any of claims 1 to 8, wherein the first body and the second body are slidably connected, and the damping member is located inside a cavity enclosed by the first body and the second body.