CN113808481B

CN113808481B - Display device

Info

Publication number: CN113808481B
Application number: CN202010550496.5A
Authority: CN
Inventors: 李亮
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2023-06-13
Anticipated expiration: 2040-06-16
Also published as: CN113808481A

Abstract

The embodiment of the application provides a display device. The display device includes: the first moving body and the second moving body are connected with the first moving body in a sliding way so as to realize the switching of the first moving body and the second moving body between a furled state and an unfolded state; the rotating mechanism is arranged at one end of the first moving body, the rotating mechanism can rotate relative to the first moving body, the rotating mechanism comprises a shaft body and a shaft sleeve, the shaft sleeve is sleeved on the outer surface of the shaft body, and the shaft sleeve can deform under the action of force; one end of the flexible screen assembly is arranged on the first moving body, the other end of the flexible screen assembly is arranged on the second moving body, and the flexible screen assembly is arranged around the rotating mechanism; when the flexible screen assembly moves around the rotating mechanism, the flexible screen assembly applies a first force to the sleeve, causing the sleeve to deform to reduce stress on the flexible screen assembly around the rotating mechanism portion. The axle sleeve of this application embodiment can play the guard action to the flexible screen subassembly, when flexible screen subassembly motion, can reduce the possibility that flexible screen subassembly damaged.

Description

Display device

Technical Field

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

Background

With the development of electronic technology, the degree of intellectualization of display devices such as smartphones is increasing. The display device may display a picture through its display screen.

Among them, the flexible display screen is attracting attention because of its characteristics of being foldable and bendable, and the overall size of the display device can be reduced by folding or bending the flexible display screen. However, flexible displays are prone to damage during movement.

Disclosure of Invention

The embodiment of the application provides a display device, which can reduce the possibility of damage to the flexible screen assembly in the movement process.

An embodiment of the present application provides a display device, including:

a first moving body;

the second moving body is slidably connected with the first moving body so as to realize the switching between the first moving body and the second moving body in a furled state and an unfolded state;

the rotating mechanism is arranged at one end of the first moving body, can rotate relative to the first moving body, and comprises a shaft body and a shaft sleeve, wherein the shaft sleeve is sleeved on the outer surface of the shaft body, and the shaft sleeve can deform under the stress of the shaft sleeve; and

the flexible screen assembly is arranged at one end of the first moving body, the other end of the flexible screen assembly is arranged at the second moving body, and the flexible screen assembly is arranged around the rotating mechanism;

when the flexible screen assembly moves about the rotation mechanism, the flexible screen assembly applies a first force to the sleeve, causing the sleeve to deform to reduce stress of the flexible screen assembly about the rotation mechanism portion.

The axle sleeve of this application embodiment can play the guard action to the flexible screen subassembly, when flexible screen subassembly motion, can reduce the possibility that flexible screen subassembly damaged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts throughout the following description.

Fig. 1 is a perspective view of a first structure of a display device according to an embodiment of the present application.

Fig. 2 is a schematic view of the display device shown in fig. 1 in an unfolded state.

Fig. 3 is a sectional view of the display device shown in fig. 2 along the P-P direction.

Fig. 4 is a schematic view of a first structure of a rotating mechanism in the display device shown in fig. 3.

Fig. 5 is a schematic view of a portion of a flexible screen assembly and a turning mechanism mated in accordance with an embodiment of the present application.

Fig. 6 is a schematic view of the forces experienced by the layers of the flexible screen assembly of the present embodiment as it moves about a rotating mechanism.

Fig. 7 is a schematic diagram of a second structure of a rotating mechanism in a display device according to an embodiment of the present application.

Fig. 8 is a schematic diagram of a third structure of a rotating structure in a display device according to an embodiment of the present application.

Fig. 9 is a schematic diagram of a fourth structure of a rotating mechanism in a display device according to an embodiment of the present application.

Fig. 10 is a schematic view of a fifth structure of a rotating mechanism in a display device according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a rotating mechanism and a part of flexible screen assembly in a display device according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a flexible screen assembly in a display device according to an embodiment of the present application.

Fig. 13 is another schematic structural diagram of a flexible screen assembly in a display device according to an embodiment of the present application.

Fig. 14 is a second structural perspective view of the display device according to the embodiment of the present application.

Fig. 15 is a schematic view of the display device shown in fig. 14 in an unfolded state.

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. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present application based on the embodiments herein.

Referring to fig. 1 and fig. 2, fig. 1 is a perspective view of a first structure of a display device according to an embodiment of the present application, and fig. 2 is a schematic view of the display device shown in fig. 1 in an unfolded state. The display device 20 may include a first moving body 100, a second moving body 200, and a flexible screen assembly 300. The first and second moving

bodies

100 and 200 are slidably coupled to relatively move the first and second moving

bodies

100 and 200 in a direction approaching or moving away from each other, so that switching between the unfolded state and the folded state can be achieved. The folded state may refer to fig. 1, that is, a state in which the first moving body 100 and the second moving body 200 are relatively moved in a direction approaching each other to be finally formed. The unfolded state may refer to fig. 2, that is, a state in which the first moving body 100 and the second moving body 200 are relatively moved in a direction away from each other.

It should be noted that, there may be various unfolding states of the first moving body 100 and the second moving body 200, for example, the maximum moving distance of the first moving body 100 and the second moving body 200 in the direction of moving away from each other is H, and the first moving body 100 and the second moving body 200 may move away from each other in the folded state so as to achieve the unfolding states that one quarter H, one half H, and three quarters H form different distances with equal distances. The state gradually farther from the gradient may be sequentially defined as a first expanded state, a second expanded state, a third expanded state, and the like.

It should be further noted that, when the first moving body 100 and the second moving body 200 are in the first unfolded state, such as the distance that the first moving body 100 and the second moving body 200 are relatively far away from each other in the first unfolded state is one-fourth H, the first moving body 100 and the second moving body 200 may still move away from each other to reach the second unfolded state, such as the distance that the first moving body 100 and the second moving body 200 are relatively far away from each other in the second unfolded state is one-half H.

It should be understood that the one or more deployed states of the first and second moving

bodies

100 and 200 according to the embodiment of the present application are only examples, and do not constitute limitations on the deployed states of the first and second moving

bodies

100 and 200 according to the embodiment of the present application.

The embodiment of the application can design the positioning structure for the unfolding state of the display device 20 to realize positioning so as to keep different unfolding states of the display device. The positioning structure can be realized by adopting a magnetic positioning piece, and the positioning structure can also realize positioning by adopting the matching of the positioning piece and a positioning groove.

The first moving body 100 and the second moving body 200 may be driven to move each other in an electric manner, such as providing one or more driving motors, the same number of driving assemblies as the motors, a driving assembly may include one or more gears, one or more racks, or one or more driving belts, etc. The driving motor may drive the first and second moving

bodies

100 and 200 to move toward or away from each other through the transmission assembly. Of course, the first moving body 100 and the second moving body 200 may be driven to move closer to or farther from each other by a manual operation.

One end of the flexible screen assembly 300 is fixedly connected with the first moving body 100, and the other end of the flexible screen assembly 300 is fixedly connected with the second moving body 200. The first and second moving

bodies

100 and 200 may support the flexible screen assembly 300. The first moving body 100 and the second moving body 200 may drive the flexible screen assembly 300 to move together or drive the flexible screen assembly 300 to move during the mutual movement, so that the length of the flexible screen assembly 300 may be adjusted, and thus the size of the display area of the display device 20 may be changed.

When the first and second moving

bodies

100 and 200 relatively move in a direction approaching each other, the first and second moving

bodies

100 and 200 may drive a portion of the flexible screen assembly 300 to be received inside the display device 20, such as the second moving body 200 of the display device 20. When the first and second moving

bodies

100 and 200 relatively move in a direction away from each other, the first and second moving

bodies

100 and 200 may drive a portion of the flexible screen assembly 300 to protrude from the inside of the display device 20, such as the second moving body 200.

The non-display surface of the flexible screen assembly 300 is disposed on one surface of the first moving body 100 and one surface of the second moving body, or the non-display surface of the flexible screen assembly 300 is disposed on one surface of the first moving body 100 and one surface of the second moving body 200. Whether the first and second moving

bodies

100 and 200 are in a folded state or in an unfolded state, the flexible screen assembly 300 covers one side of the first moving body 100 and one side of the second moving body 200, except for the difference in the size of the coverage area.

When the first moving body 100 and the second moving body 110 are in the folded state, a part of the other surface of the first moving body 100 is located in the second moving body 200. Or when the first moving body 100 and the second moving body 200 are in the folded state, a part of the first moving body 100 is received in the second moving body 200, and at this time, the other surface of the first moving body 100 is blocked by the second moving body 200. While the other side of the second moving body 200 serves as a housing of the display device 20.

When the first moving body 100 and the second moving body 200 are in the unfolded state, a part of the other surface of the first moving body 100 is positioned outside the second moving body 200, or is exposed outside, or is not shielded by the second moving body 200.

The present embodiment abuts, such as abutting, the side positions of the first moving body 100 and the second moving body 200 when the first moving body 100 and the second moving body 200 are in the collapsed state. So that the overall structure of the first moving body 100 and the second moving body 200 can be seen from the external appearance.

It should be noted that, when the flexible screen assembly 300 moves following the movement of the first moving body 100 and the second moving body 200, a large friction force is generated, and the flexible screen assembly 300 is easily damaged.

Based on this, in the embodiment of the present application, a rotation mechanism may be disposed in the display device 20, and when the flexible screen assembly 300 needs to move, the flexible screen assembly may also rotate around the rotation mechanism, so that the friction force of the flexible screen assembly 300 during the movement process may be reduced.

Referring to fig. 3, fig. 3 is a cross-sectional view of the display device shown in fig. 2 along the P-P direction. The display device 20 may further include a rotation mechanism 400, and the rotation mechanism 400 may be provided to one of the moving bodies of the display device 20. Such as the rotation mechanism 400 is provided at the first moving body 100, and the rotation mechanism 400 may be provided to an end position of the first moving body 100, or the rotation mechanism 400 may be provided near an end of the first moving body 100.

Referring to fig. 4, fig. 4 is a schematic diagram of a first structure of a rotating mechanism in the display device shown in fig. 3. The rotation mechanism 400 may include a shaft body 420 and two pins 440, one pin 440 may be disposed at one end of the shaft body 420, and the other pin 440 may be disposed at the other end of the shaft body 420. The two pins 440 may be fixedly connected to the first moving body 100, such as the first moving body 100 is provided with a shaft hole for placing the pins 440, and the rotation of the rotation mechanism 400 with respect to the first moving body 100 may be achieved by the cooperation of the pins 440 and the shaft hole.

The shaft 420 may be hollow, so as to reduce the weight of the shaft 420. Of course, the shaft 420 may be of a solid design.

The shaft 420 may be made of a hard material, such as metal.

During assembly of the display device 20, a portion of the flexible screen assembly 300 may be designed around the shaft 420. Thus, the flexible screen assembly 300 moves about the shaft 420 when in motion. However, since the flexible screen assembly 300 has a multi-layered structure when the flexible screen assembly 300 moves around the shaft 420, and material properties such as strength, young's modulus, etc. of the respective layered structures of the flexible screen assembly 300 are not uniform, stress applied to the respective layered structures of the flexible screen assembly 300 during the movement is different, which easily causes breakage of the display surface of the display screen assembly 300, and non-display screen wrinkles of the display screen assembly 300.

Referring to fig. 5 and 6, fig. 5 is a schematic view of a portion of the flexible screen assembly according to the embodiment of the present application and the rotating mechanism, and fig. 6 is a schematic view of the forces applied to the layers of the flexible screen assembly according to the embodiment of the present application when the flexible screen assembly moves around the rotating mechanism. When the flexible screen assembly 300 moves in the first direction or the second direction, the flexible screen 300 moves around the rotation mechanism 400, and at this time, the flexible screen assembly 300 may receive a tensile force moving in the first direction or the second direction, and the tensile force applied to the layer structure (such as the cover plate, the polarizer, etc.) of the display surface of the flexible screen assembly 300 is greater due to the non-uniformity of the material properties of the layer structure of the flexible screen assembly 300, such as strength, young's modulus, etc. And thus the layer structure of the display surface of the flexible screen assembly 300 is easily broken.

At the same time, the flexible screen assembly 300 applies its force to the outer surface of the rotation mechanism 400, and still generates friction due to the rotation of the flexible screen assembly 300 around the outer surface of the rotation mechanism 400, where the pressing force applied to the layer structure (such as the display layer) of the non-display surface of the flexible screen assembly 300 is large. Thus easily causing a problem of wrinkling of the layer structure of the non-display surface of the flexible screen assembly 300.

It should also be noted that during rotation of flexible shield assembly 300 about rotation mechanism 400, flexible shield assembly 300 receives a pulling action that may apply a force to rotation mechanism 400. The rotation mechanism 400 now acts on the flexible screen assembly 300 with a counter force such as counter force F.

The first direction may be understood as a direction in which the first moving body 100 and the second moving body 200 move toward each other. The second direction may be understood as a direction in which the first moving body 100 and the second moving body 200 move away from each other.

Based on this, in the embodiment of the present application, a soft material may be disposed on the outer surface of the shaft body 420, so as to implement protection of the flexible screen assembly 300.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating a second structure of a rotating mechanism in a display device according to an embodiment of the present disclosure. The rotation mechanism 400 may further include a sleeve 460, and the sleeve 460 may be sleeved on the outer surface of the shaft body 420. The sleeve 460 may deform upon receiving a force. When the flexible screen assembly 300 moves around the rotation mechanism 400, the flexible screen assembly 300 may apply a force, such as a first force, to the sleeve 460, which may deform the sleeve 460, thereby reducing stress on the portion of the flexible screen assembly 300 around the rotation mechanism 400. The likelihood of breakage of the display surface of the flexible screen assembly 300 during movement is thereby reduced. While also reducing the likelihood of the flexible screen assembly 300 buckling during movement about the rotation mechanism 400.

The smoothness of the sleeve 460 may be greater than that of the shaft 420, so that the friction of the non-display surface of the flexible screen assembly 300 is reduced when the non-display surface moves around the rotation mechanism 400, so as to protect the flexible screen assembly 300. The likelihood of the flexible screen assembly 300 buckling during movement about the swivel mechanism 400 may be further reduced.

The sleeve 460 may be made of a soft material or a flexible material. Such as rubber, is soft, is easy to deform and has smooth surface.

The sleeve 460 of the present embodiment may have a one-layer structure, which may have a certain thickness. Of course, it is understood that the sleeve 460 may also have a multi-layer structure, and the layer structure of the sleeve 460 may be set according to actual requirements. The shaft body 420 may have a cylindrical structure, and a cross section thereof may have a circular structure. The sleeve 460 may have a cylindrical structure, and a cross section of the sleeve may have a circular ring structure. The thickness of the sleeve 460 may be set according to practical requirements.

When the flexible screen assembly 300 is not moving about the rotation mechanism 400, the rotation mechanism 400 may remain in the first state, i.e., the rotation mechanism 400 does not receive the force of the flexible screen assembly 300. The flexible screen assembly 300, when moved about the rotation mechanism 400, switches the rotation mechanism 400 from a first state to a second state in which the sleeve 460 is deformed, such as from a circular configuration to an oval configuration. I.e. the cross-section of the sleeve 460 of the rotation mechanism 400 in the first state is of circular or annular configuration. And the cross-section of the sleeve 460 of the rotation mechanism 400 in the second state is of an elliptical configuration.

It should be noted that the manner of protecting the flexible screen assembly 300 according to the embodiments of the present application is not limited thereto.

Referring to fig. 8, fig. 8 is a schematic diagram of a third structure of a rotating structure in a display device according to an embodiment of the disclosure. The rotation mechanism 400 may also include a spacer layer 480. The shaft body 420 and the shaft sleeve 460 may be spaced from each other, or a space may be formed between the shaft body 420 and the shaft body 460, and a spacer layer 480 may be disposed in the space, or a preset gas may be filled in the space. The thickness of the sleeve 460 may be designed to be thinner, and the sleeve 460 may be deformed in the space between the spacers 480, i.e. the shaft 460 may be deformed by the spacers 480.

The spacer layer 480 may be understood as a structure that is easily deformed such as a honeycomb structure or a mesh structure. The spacer layer 480 may also be understood as a pre-set gas, such as air. Note that the structure of the spacer layer 480 is not limited thereto.

Wherein, the sleeve 460 and the spacer 480 may be made of soft materials or flexible materials. And the hardness of the material of the spacer layer 480 may be designed to be less than the hardness of the material of the sleeve 460.

The spacer layer 480 is designed between the shaft sleeve 460 and the shaft body 420, so that the deformation of the rotating mechanism 400 is easier to realize, and the deformation amount can be increased compared with that of a single shaft sleeve. Therefore, the design of the shaft sleeve 460 and the spacer layer 480 is easier to deform, the deformation amount is larger, and the protection effect on the flexible screen assembly 300 is better.

When the flexible screen assembly 300 moves around the rotation mechanism 400, the flexible screen assembly 300 may apply a force, such as a first force, to the sleeve 460, which may deform the sleeve 460 over the spatial extent of the spacer layer 480, thereby reducing stress on the portion of the flexible screen assembly 300 around the rotation mechanism 400. Thereby reducing the curvature variation of the flexible screen assembly 300 and thus reducing the likelihood of breakage of the display surface of the flexible screen assembly 300 during movement. While also reducing the likelihood of the flexible screen assembly 300 buckling during movement about the rotation mechanism 400.

When the flexible screen assembly 300 is not moving about the rotation mechanism 400, the rotation mechanism 400 may remain in a third state, i.e., the rotation mechanism 400 does not receive the force of the flexible screen assembly 300. Upon movement of the flexible screen assembly 300 about the rotation mechanism 400, the rotation mechanism 400 switches from a third state to a fourth state in which the sleeve 460 deforms within the spatial extent of the spacer layer 480, such as from a circular configuration to an oval configuration. I.e. the cross-section of the sleeve 460 of the rotation mechanism 400 in the third state is of circular or annular configuration. And the cross-section of the sleeve 460 of the rotation mechanism 400 in the fourth state is of an elliptical configuration. Likewise, the spacer layer 480 changes with the change in the sleeve 460. Such as spacer layer 480 of rotation mechanism 400, is circular in cross-section or annular in cross-section in the third state. And the cross section of the spacer layer 480 of the rotation mechanism 400 in the fourth state is of an elliptical configuration.

Referring to fig. 9 and fig. 10, fig. 9 is a schematic diagram of a fourth structure of a rotating mechanism in a display device according to an embodiment of the present application, and fig. 10 is a schematic diagram of a fifth structure of a rotating mechanism in a display device according to an embodiment of the present application. The sleeve 460 of the rotation mechanism 400 is provided with a plurality of spacing grooves 401, so that when the flexible screen assembly 300 moves around the rotation mechanism 400, wrinkles are prevented from being generated by the cooperation of the non-display surface of the flexible screen assembly 300 and the sleeve 460.

In order to better protect the flexible screen assembly 300, the flexible material is added to the original structure of the shaft body 420, and is discontinuous, so that the flexible screen assembly 300 is prevented from being wrinkled (or wrapped), meanwhile, the intermittent flexible material can bring a buffer zone to the force between the flexible screen assembly 300 and the shaft body 420, and meanwhile, curvature change of the flexible screen assembly 300 can be reduced, so that the flexible screen assembly is effectively protected.

Referring to fig. 11 and fig. 12, fig. 11 is a schematic structural diagram of a rotating mechanism and a part of a flexible screen assembly in a display device according to an embodiment of the present application, and fig. 12 is a schematic structural diagram of a flexible screen assembly in a display device according to an embodiment of the present application. The flexible screen assembly 300 may include a display layer 310, a cover layer 420, and a protective layer 330.

The display layer 310 may include a substrate sub-layer, a circuit arrangement sub-layer, a light emitting sub-layer, a touch sub-layer, a polarizing structure sub-layer, and the like.

The cover layer 310 may include a cover, such as a light-transmitting glass.

Wherein the protective layer 330 may include a plurality of spacer bars 332, a spacer bar 332 may be placed into a spacer groove 401 during movement of the flexible screen assembly 300. It will be appreciated that two adjacent spacer layers form a shaft portion and that a plurality of shaft portions form a shaft sleeve 460 structure. The protective layer 330 may be made of a soft material such as rubber.

On the one hand, a buffer zone can be caused to the force between the flexible screen assembly 300 and the shaft body 420, and the curvature change of the flexible screen assembly 300 can be reduced, so that the flexible screen assembly 300 is effectively protected. And at the same time, the gear transmission effect can be achieved, so that the stress of the flexible screen assembly 300 is reduced (the flexible screen assembly 300 is prevented from being directly contacted with the shaft body 420 to generate a sliding action, and thus the flexible screen assembly is damaged).

It should be noted that, the protective layer 300 designed on the non-display surface of the flexible screen assembly 300 may also be a continuous structure, and referring to fig. 13, fig. 13 is a schematic diagram of another structure of the flexible screen assembly in the display device according to the embodiment of the present application. The protective layer 330 of the flexible screen assembly 300 shown in fig. 13 may be mated with the rotating assembly 400 shown in any of fig. 4, 6, and 7.

Referring to fig. 14 and 15, fig. 14 is a perspective view of a second structure of the display device according to the embodiment of the present application, and fig. 15 is a schematic view of the display device shown in fig. 14 in an unfolded state.

The display device 40 includes a first moving body 42, a second moving body 44, and a flexible screen assembly 46. Wherein the first moving body 42 and the second moving body 44 are movable with each other, such as slidable with each other, to achieve switching between the collapsed state and the expanded state. One end of the flexible screen assembly 46 is fixed on the first moving body 42, and the other end is fixed on the second moving body 44, and the first moving body 42 and the second moving body 44 can move the flexible screen assembly 46 mutually, so that a part of the flexible screen assembly 46 can be contained in the first moving body 42 and the second moving body 44, or a part of the flexible screen assembly 46 can be displayed from the first moving body 42 and the second moving body 44. So that the display area of the flexible screen assembly 46 can be changed.

The first and second moving

bodies

42, 44 of the display device 40 can be relatively moved in one of the directions to change the display area of the flexible screen assembly 46. During the movement of the first and second moving

bodies

42 and 44, the top and bottom ends of the display screen of the flexible screen assembly 46 may be unchanged, while the lateral display contents of the flexible screen assembly 46 are changed. Alternatively, the first moving body 42 and the second moving body 44 may move with each other to change the width of the flexible screen assembly 46, and the length of the flexible screen assembly 46 is not changed, so that the top end position or the bottom end position of the display screen of the flexible screen assembly 46 is not changed.

The display device 40 may also include a rotating mechanism, which may refer to the above, and will not be described herein.

The foregoing has described in detail the display device provided by the embodiments of the present application, and specific examples have been used herein to illustrate the principles and embodiments of the present application, where the foregoing examples are provided to assist in understanding the methods of the present application and their core ideas; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.

Claims

1. A display device, comprising:

a first moving body;

when the flexible screen assembly moves around the rotating mechanism, the flexible screen assembly applies a first force to the shaft sleeve, so that the shaft sleeve deforms to reduce the stress of the flexible screen assembly around the rotating mechanism part;

the flexible screen assembly comprises a flexible screen and a plurality of spacing bars arranged on the non-display surface of the flexible screen, wherein the shaft sleeve is provided with a plurality of spacing grooves, a shaft sleeve part is formed between every two adjacent spacing grooves, one spacing groove is used for accommodating one spacing bar, and when the flexible screen assembly surrounds the rotating mechanism, the non-display surface of the flexible screen assembly is prevented from being wrinkled due to the cooperation of the shaft sleeve.

2. The display device of claim 1, wherein the sleeve is a flexible material.

3. The display device according to claim 1, wherein the spacer groove extends from one end of the shaft body to the other end of the shaft body.

4. The display device according to claim 1, wherein the spacer is made of a flexible material.

5. The display device according to any one of claims 1 to 4, wherein a cross section of the boss is a circular structure in a state where the boss receives no force;

the cross section of the shaft sleeve is of an oval structure in a state of receiving first acting force.

6. The display device according to any one of claims 1 to 4, wherein the boss is a one-layer structure.

7. The display device according to any one of claims 1 to 4, wherein the boss is a multilayer structure.

8. The display device of claim 1, wherein the flexible screen assembly comprises a flexible screen and a protective layer disposed on a non-display surface of the flexible screen, the protective layer being of a soft material.