Scroll assembly and scroll display device

Abstract

The present application relates to a scroll assembly and a sliding display device. The scroll assembly includes an outer shaft, a support member, and a buffer member. An opening is provided on the circumferential side surface of the outer shaft; the support member is provided in the opening, and a first support surface is provided on the side of the support member away from the axis of the outer shaft; the buffer member is provided between the support member and the outer shaft, and the buffer member is used to change the distance between the support member and the side wall of the opening along the circumference of the outer shaft. During the sliding process of the flexible display screen, a part of the portion where the flexible display screen contacts the scroll assembly is supported by the outer surface of the outer shaft, and another part is supported by the first support surface of the support member. When a large stress is generated in the portion where the flexible display screen contacts the scroll assembly, the buffer member is deformed due to the stress on the support member, causing the support member and the outer shaft to shift relative to each other, thereby releasing the stress, thereby improving or avoiding the phenomenon of stress concentration, and improving the stress condition of the flexible display screen.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a scroll assembly and a scroll display device. Background Art

[0002] Currently, consumers are looking for display devices that offer both a large screen and wide viewing angle when in use, and good portability when not in use. With the development of flexible display technology, foldable display devices have been mass-produced, becoming the epitome of both large screens and portability. Other display devices that also offer both large screens and portability include rollable and curly displays, and they are expected to become the next hot market trends.

[0003] Among them, during the sliding process of the flexible display screen of the rolling display device, the stress conditions of various parts of the flexible display screen will change. The part in contact with the rolling shaft will experience stress concentration due to the greater force, and stress concentration may cause problems such as film breakage, dislocation or peeling of the adhesive layer of the flexible display screen, which may lead to abnormal performance of the flexible display screen. Summary of the Invention

[0004] Based on this, it is necessary to provide a scroll assembly and a sliding display device, aiming to improve the stress conditions of the flexible display screen during the sliding process, so as to reduce the possibility of film breakage, adhesive layer dislocation or peeling of the flexible display screen, and improve the service life.

[0005] According to one aspect of the present application, a reel assembly is provided, the reel assembly comprising:

[0006] An outer shaft, wherein an opening is provided on a peripheral side surface of the outer shaft;

[0007] A support member is provided at the opening, and a first support surface is provided on a side of the support member away from the axis of the outer shaft; and

[0008] The buffer member is arranged between the support member and the outer shaft, and is used to change the distance between the support member and the side wall of the opening along the circumference of the outer shaft.

[0009] The scroll assembly in the embodiment of the present application can be used for a sliding display device. It is understandable that the sliding display device has a main frame and a frame that can move away from or approach the main frame along a first direction. The scroll assembly can be rotatably arranged on the frame, and the flexible display screen of the sliding display device is wound around the scroll assembly, and one end is connected to the main frame. In the process of the frame moving away from or approaching the main frame, the scroll assembly moves along the first direction to drive the flexible display screen to unfold or reel. In the scroll assembly in the embodiment of the present application, the support member is arranged at the opening of the outer shaft, and a buffer member is arranged between the support member and the outer shaft, thereby allowing the support member to move relative to the outer shaft. During the sliding process of the flexible display screen, a part of the portion where the flexible display screen contacts the scroll assembly is supported by the outer surface of the outer shaft, and another part is supported by the first supporting surface of the support member. When a large stress is generated in the contact part of the flexible display and the scroll assembly, the buffer is deformed due to the stress on the support part, so that the relative displacement between the support part and the outer shaft can release the stress to improve or avoid the stress concentration phenomenon, thereby improving the stress condition of the flexible display and reducing the possibility of the flexible display film layer breaking, the glue layer dislocation or peeling.

[0010] In some embodiments, the number of buffer members is at least two, and buffer members are provided on both sides of the support member opposite to each other along the circumference of the outer shaft. The first end of the buffer member is against the support member, and the second end of the buffer member is against the outer shaft; the first end and the second end of the buffer member are away from each other along the circumference of the outer shaft.

[0011] In some embodiments, the buffer is a spring, a rubber body, or a silicone body.

[0012] In some embodiments, the axis of the inner shaft coincides with the axis of the outer shaft.

[0013] In some embodiments, the support member has a second support surface and a third support surface adjacent to the first support surface, and the second support surface and the third support surface are away from each other along the circumference of the outer axis, wherein the first end of the buffer member located on one side of the support member is against the second support surface, and the first end of the buffer member located on the other side of the support member is against the third support surface.

[0014] In some embodiments, the opening has a first side wall and a second side wall arranged at intervals along the circumference of the outer shaft, wherein the second end of the buffer member located on one side of the support member abuts against the first side wall, and the second end of the buffer member located on the other side of the support member abuts against the second side wall.

[0015] In some embodiments, a first accommodating groove and a second accommodating groove are respectively provided on two opposite sides of the support member along the circumference of the outer shaft, and the buffer members located on both sides of the support member are respectively provided in the first accommodating groove and the second accommodating groove.

[0016] In some embodiments, the opening has a first side wall and a second side wall arranged at intervals along the circumference of the outer axis, a first protrusion is provided on the first side wall, and a second protrusion is provided on the second side wall, a portion of the first protrusion extends into the first accommodating groove and abuts against the second end of the buffer in the first accommodating groove, and a portion of the second protrusion extends into the second accommodating groove and abuts against the second end of the buffer in the second accommodating groove.

[0017] In some embodiments, the support member includes a first section and a second section, the second section is located on the side of the first section away from the axis of the outer shaft, the first support surface is arranged on the second section, the first section and the second section are both arc-shaped structures and the length of the second section along the circumference of the outer shaft is smaller than the length of the first section along the circumference of the outer shaft; the first section is provided with a second support surface and a third support surface; wherein the first end of the buffer member located on one side of the support member is against the second support surface, and the first end of the buffer member located on the other side of the support member is against the third support surface.

[0018] In some embodiments, the opening has a first side wall and a second side wall arranged at intervals along the circumference of the outer shaft, the wall surface of the first side wall is a first step surface, the wall surface of the second side wall is a second step surface, the concave and convex portions of the first step surface are arranged in sequence along the direction away from the axis of the outer shaft; the concave and convex portions of the second step surface are arranged in sequence along the direction away from the axis of the outer shaft, wherein the second end of the buffer member located on one side of the support member is abutted against the concave portion of the first step surface, and the second end of the buffer member located on the other side of the support member is abutted against the concave portion of the second step surface; the second section is located between the convex portion of the first step surface and the convex portion of the second step surface.

[0019] In some embodiments, a side of the support member close to the axis of the outer shaft is slidably connected to the outer shaft.

[0020] In some embodiments, the outer shaft is a solid shaft.

[0021] In some embodiments, a accommodating cavity is provided inside the outer shaft, and the opening is connected to the accommodating cavity. The reel assembly also includes an inner shaft, which is provided in the accommodating cavity; the inner shaft is configured to be rotatable relative to the outer shaft and the support member is fixedly connected to the inner shaft or integrally formed, or the inner shaft is fixedly connected to the outer shaft and the support member is slidably connected to the inner shaft.

[0022] In some embodiments, the axis of the inner shaft coincides with the axis of the outer shaft.

[0023] In some embodiments, the inner shaft includes a shaft body and a plurality of sliding parts circumferentially arranged on the shaft body, a sliding groove is provided on the inner wall of the outer shaft, and the sliding parts are fitted in the sliding groove in a sliding manner.

[0024] In some embodiments, the inner shaft includes a shaft body and a rotating fitting portion arranged at both ends of the shaft body. The interior of the outer shaft is also provided with a card slot located at the opposite ends of the accommodating cavity along the axial direction of the outer shaft, and the rotating fitting portion is rotatably fitted in the card slot.

[0025] In some embodiments, the first supporting surface is an arc surface, and the arc surface and the outer surface of the outer shaft are located in the same cylindrical surface.

[0026] In some embodiments, the opening extends along the axis of the outer shaft.

[0027] According to another aspect of the present application, a scrolling display device is provided, which includes the scroll assembly in any of the above embodiments and a flexible display screen wound around the scroll assembly.

[0028] The sliding display device in the embodiment of the present application adopts the scroll assembly in the above embodiment, and the support member of the scroll assembly is arranged at the opening of the outer shaft, and a buffer member is arranged between the support member and the outer shaft, thereby allowing the support member to move relative to the outer shaft. During the sliding process of the flexible display screen, a portion of the portion where the flexible display screen contacts the scroll assembly is supported by the outer surface of the outer shaft, and another portion is supported by the first support surface of the support member. When a large stress is generated in the portion where the flexible display screen contacts the scroll assembly, the buffer member is deformed due to the stress on the support member, so that the relative displacement between the support member and the outer shaft can release the stress, thereby improving or avoiding the phenomenon of stress concentration, thereby improving the stress condition of the flexible display screen, and further reducing the possibility of the flexible display screen film layer breaking, adhesive layer dislocation or peeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of the reel assembly in one embodiment of the present application;

[0030] Figure 2 This is a schematic structural diagram of a reel assembly in another embodiment of the present application;

[0031] Figure 3 for Figure 2 Schematic diagram of the AA section;

[0032] Figure 4 Schematic diagram of the structure of a scrolling display device in one embodiment of the present application;

[0033] Figure 5 This is a schematic structural diagram of a reel assembly in another embodiment of the present application;

[0034] Figure 6 This is a schematic structural diagram of a reel assembly in yet another embodiment of the present application;

[0035] Figure 7This is a structural diagram of a scrolling display device in another embodiment of the present application;

[0036] Figure 8 for Figure 7 Schematic diagram of the BB cross section. DETAILED DESCRIPTION

[0037] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] When describing positional relationships, unless otherwise specified, when an element, such as a layer, film, or substrate, is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. Furthermore, when a layer is referred to as being "under" another layer, it can be directly below or one or more light-emitting units may be present. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more light-emitting units may be present.

[0040] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0041] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this application.

[0042] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately," "approximately," or "substantially" can mean within one or more standard deviations, and is not limited here.

[0043] Furthermore, in the specification, the phrase “planar distribution diagram” refers to a drawing when the target portion is viewed from above, and the phrase “cross-sectional diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0044] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0045] Currently, consumers are looking for display devices that offer both a large screen and wide viewing angle when in use, and good portability when not in use. With the development of flexible display technology, foldable display devices have been mass-produced, becoming the epitome of both large screens and portability. Other display devices that also offer both large screens and portability include rollable and curly displays, and they are expected to become the next hot market trends.

[0046] Among them, during the sliding process of the flexible display screen of the sliding display device, the stress conditions of various parts of the flexible display screen will change. The part in contact with the sliding shaft will experience stress concentration due to the greater force. Stress concentration may cause problems such as film breakage of the flexible display screen, dislocation or peeling of the adhesive layer, and accumulation of adhesive materials, which may lead to abnormal performance of the flexible display screen.

[0047] In response to the above problems, an embodiment of the first aspect of the present application proposes a scroll assembly, which aims to improve the stress conditions of the flexible display during the sliding and rolling process, so as to reduce the possibility of film breakage, adhesive layer dislocation or peeling, and adhesive accumulation of the flexible display.

[0048] like Figure 1 、 Figure 2 and Figure 3 As shown, the reel assembly 100 in the embodiment of the first aspect of the present application includes an outer shaft 110, a support member 130, and a buffer member 140. Specifically, an opening is provided on the circumferential side surface of the outer shaft 110, and the support member 130 is disposed in the opening. A first supporting surface 131 is provided on the side of the support member 130 away from the axis of the outer shaft 110, and the buffer member 140 is disposed between the support member 130 and the outer shaft 110. The buffer member 140 is used to change the spacing between the support member 130 and the sidewall of the opening along the circumference of the outer shaft. Figure 2 The dotted line position in may be the axis position of the outer shaft 110 .

[0049] The scroll assembly 100 in the embodiment of the present application may be a sliding scroll assembly, which may be used in a sliding scroll display device. Figure 4 The scrolling display device comprises a main frame 300 and a frame 400 that can move away from or toward the main frame 300 in a first direction. A reel assembly 100 can be rotatably mounted on the frame 400. The flexible display 200 of the scrolling display device is wound around the reel assembly 100 and connected to the main frame 300 at one end. As the frame 400 moves away from or toward the main frame 300, the reel assembly 100 moves in the first direction, thereby causing the flexible display 200 to unfold or retract.

[0050] In the scroll assembly 100 of the present embodiment, the support member 130 is disposed at an opening on the outer peripheral side of the outer shaft 110, and a buffer member 140 is disposed between the support member 130 and the outer shaft 110. This allows the support member 130 to move relative to the outer shaft 110 along the circumference of the outer shaft 110. During the rolling process of the flexible display 200, the portion of the flexible display 200 that contacts the scroll assembly 100 is partially supported by the outer surface of the outer shaft 110 (i.e., the outer peripheral side of the outer shaft 110) and partially supported by the first support surface 131 of the support member 130. When a large stress is generated in the part where the flexible display screen 200 contacts the scroll assembly 100, the buffer member 140 is deformed due to the stress on the support member, so that the relative displacement between the support member 130 and the outer shaft 110 can release the stress to improve or avoid the stress concentration phenomenon, thereby improving the stress condition of the flexible display screen 200 and reducing the possibility of film breakage, adhesive layer dislocation or peeling, and adhesive accumulation of the flexible display screen 200.

[0051] It is understood that for the scrolling display device, the first direction is the direction in which the flexible display screen 200 is unfolded and retracted. Furthermore, when the scroll assembly 100 is in use, at least one of the two opposing sides of the support member 130 along the circumference of the outer shaft 110 must maintain a distance from the sidewall of the opening, thereby allowing the support member 130 to rotate clockwise and counterclockwise. This prevents the support member 130 from contacting the sidewall of the opening before the stress on the flexible display screen 200 is released, thereby preventing the support member 130 from failing to improve the stress on the flexible display screen 200. Optionally, a buffer member 140 is provided on at least one of the two opposing sides of the support member 130 along the circumference of the outer shaft 110, so that when the support member is subjected to stress, the support member 130 can move clockwise or counterclockwise along the circumference of the outer shaft.

[0052] In some embodiments, there are at least two buffer members 140, each of which is disposed on opposite sides of the support member 130 along the circumference of the outer shaft 110. A first end of each buffer member 140 abuts (e.g., may be in contact with or connected to) the support member 130, and a second end of each buffer member 140 abuts (e.g., may be in contact with or connected to) the outer shaft 110. The first and second ends of each buffer member 140 face away from each other along the circumference of the outer shaft 110. The buffer members 140 on either side of the support member 130 are configured to maintain the support member 130 at the center of the opening along the circumference of the outer shaft 110 when not subjected to stress from the flexible display. In this embodiment, there are at least two buffer members 140, each of which is disposed on opposite sides of the support member 130 along the circumference of the outer shaft 110, so that the buffer members 140 on either side of the support member 130 provide a cushioning effect on the support member 130. The buffer members 140 located on both sides of the support member 130 are used to keep the support member 130 at the center of the opening along the circumference of the outer shaft 110 when it is not subjected to stress from the flexible display screen. In this way, the support member 130 has equal movable space in the clockwise and counterclockwise directions, so that the stress conditions of the flexible display screen 200 can be improved during the unfolding and rewinding processes, and the degree of improvement can be roughly the same.

[0053] The buffer member 140 can be used to change the distance between the support member 130 and the sidewall of the opening along the circumference of the outer shaft 110 by deforming. The buffer member 140 can function as a damper. In some embodiments, the buffer member 140 is a damper such as a spring, rubber, or silicone. Using a spring, rubber, or silicone as the buffer member 140 not only provides a cushioning effect but also reduces cost. The buffer member 140 can deform along the circumference of the outer shaft 110, such as by stretching or contracting.

[0054] In some embodiments, as Figure 1 、 Figure 2 and Figure 3As shown, the support member 130 has a second support surface 132 and a third support surface 133 adjacent to the first support surface 131. The second support surface 132 and the third support surface 133 are separated from each other along the circumference of the outer shaft 110. The first end of the buffer member 140 located on one side of the support member 130 abuts against (e.g., may be in contact with or connected to) the second support surface 132, and the first end of the buffer member 140 located on the other side of the support member 130 abuts against (e.g., may be in contact with or connected to) the third support surface 133. In this embodiment, the second support surface 132 and the third support surface 133 of the support member 130 serve as the abutment surfaces of the first end of the buffer member 140. That is, when the buffer member 140 is in a compressed state, the elastic force provided by the buffer member 140 directly acts on the second support surface 132 or the third support surface 133 of the support member 130, thereby providing an elastic buffering effect for the support member 130. The support member 130 in this embodiment has the advantages of simple structure and low processing cost.

[0055] Optionally, the opening has a first sidewall 112 and a second sidewall 113 spaced apart along the circumference of the outer shaft 110, wherein the second end of the buffer member 140 located on one side of the support member 130 abuts against (e.g., may be in contact with or connected to) the first sidewall 112, and the second end of the buffer member 140 located on the other side of the support member 130 abuts against (e.g., may be in contact with or connected to) the second sidewall 113. In this embodiment, the sidewall of the opening is used as the abutment surface for the second end of the buffer member 140, thereby meeting the installation requirements of the buffer member 140 and eliminating the need for additional processing of the outer shaft 110, resulting in low processing costs.

[0056] Optionally, the support member 130 may be an arc-shaped structure so that the shape can be well matched with the outer shaft 110 .

[0057] Optionally, one of the sidewall of the opening and the support member 130 may be provided with a receiving groove, and the other may be provided with a protrusion. The buffer members 140 located on either side of the support member 130 are respectively disposed in the receiving grooves. The corresponding protrusions may partially extend into the corresponding receiving grooves. The opposing ends of the buffer members 140 along the circumference of the outer shaft 110 respectively abut (e.g., may contact or connect) the bottom of the corresponding receiving groove and the top of the protrusion.

[0058] In some embodiments, as Figure 5As shown, the support member 130 is provided with a first receiving groove 134 and a second receiving groove 135 on opposite sides of the outer shaft 110, respectively. The buffer members 140 located on both sides of the support member 130 are respectively disposed in the first receiving groove 134 and the second receiving groove 135. This arrangement, on the one hand, provides dedicated accommodation space for the buffer members 140 located on both sides of the support member 130, thereby protecting the buffer members 140. On the other hand, by slotting the support member 130, the weight of the support member 130 can be reduced, thereby contributing to the lightweighting of the reel assembly 100.

[0059] Optionally, the opening has a first side wall 112 and a second side wall 113 arranged at intervals along the circumference of the outer shaft 110, a first protrusion 1121 is provided on the first side wall 112, and a second protrusion 1131 is provided on the second side wall 113, a portion of the first protrusion 1121 extends into the first accommodating groove 134 and abuts against (for example, may be in contact with or connected to) the second end of the buffer 140 in the first accommodating groove 134, and a portion of the second protrusion 1131 extends into the second accommodating groove 135 and abuts against (for example, may be in contact with or connected to) the second end of the buffer 140 in the second accommodating groove 135. In this embodiment, a portion of the first protrusion 1121 located on the first side wall 112 of the opening extends into the first accommodating groove 134 and abuts against the second end of the buffer 140 in the first accommodating groove 134, and a portion of the second protrusion 1131 located on the second side wall 113 of the opening extends into the second accommodating groove 135 and abuts against the second end of the buffer 140 in the second accommodating groove 135. Thus, the installation requirements of the buffer 140 can be met, so that the buffer 140 plays a buffering role between the support member 130 and the outer shaft 110. In addition, the buffer 140 is also placed in a closed accommodating space, which provides protection for the buffer 140.

[0060] Optionally, the support member 130 is provided with protrusions on opposite sides of the outer shaft 110. The first sidewall 112 and the second sidewall 113 of the opening, spaced apart along the circumference of the outer shaft 110, are each provided with a receiving groove. A portion of the corresponding protrusion may extend into the corresponding receiving groove. The opposing ends of the buffer member 140 along the circumference of the outer shaft 110 respectively abut (e.g., may contact or connect) the bottom of the corresponding receiving groove and the top of the protrusion.

[0061] Optionally, a receiving groove is provided on one of the two sides of the support member 130 that are opposite to each other along the circumference of the outer shaft 110, and a protrusion is provided on the other side. One of the first side wall 112 and the second side wall 113 of the opening that are spaced apart along the circumference of the outer shaft 110 is provided with a receiving groove, and the other may be provided with a protrusion. The receiving groove on the support member 130 corresponds to the protrusion on the side wall of the opening, and the protrusion on the support member 130 corresponds to the receiving groove on the side wall of the opening. A portion of the corresponding protrusion extends into the corresponding receiving groove. The two opposite ends of the buffer member 140 along the circumference of the outer shaft 110 respectively abut against (for example, they may be in contact or connected to) the bottom of the corresponding receiving groove and the top of the protrusion.

[0062] Alternatively, the support member 130 may be an arc-shaped structure, thereby better matching the shape of the outer shaft 110. Furthermore, both the first receiving groove 134 and the second receiving groove 135 may be arc-shaped receiving grooves, and accordingly, the first protrusion 1121 and the second protrusion 1131 may be arc-shaped protrusions. Thus, the receiving grooves and the protrusions match the shape of the support member 130.

[0063] Optionally, the second support surface 132 and the third support surface 133 of the support member 130 may be stepped surfaces. The first sidewall 112 and the second sidewall 113 of the opening may be stepped surfaces. The convex and concave portions of the stepped second support surface 132 may be arranged radially of the outer shaft 110. The convex and concave portions of the stepped third support surface 133 may be arranged radially of the outer shaft 110. The convex and concave portions of the stepped first sidewall 112 may be arranged radially of the outer shaft 110. The convex and concave portions of the stepped second sidewall 113 may be arranged radially of the outer shaft 110. The convex portions of the stepped second support surface 132 and the concave portions of the stepped first sidewall 112 may face each other circumferentially of the outer shaft 110. The concave portions of the stepped second support surface 132 and the convex portions of the stepped first sidewall 112 may face each other circumferentially of the outer shaft 110. The buffer member 140 located between the second supporting surface 132 and the first side wall 112 can be located between the second supporting surface 132 and the concave and convex portions of the first side wall 112 close to the axis of the outer shaft 110, so as to facilitate hiding the buffer member 140 inside the scroll assembly 100 and increase the total contact area between the first supporting surface 131 or the outer peripheral side surface of the outer shaft 110 and the flexible display screen. For example, the concave and convex portions of the second supporting surface 132 with a stepped surface can be arranged in a direction away from the axis of the outer shaft 110, and the convex and concave portions of the first side wall 112 with a stepped surface can be arranged in a direction away from the axis of the outer shaft 110. The buffer member 140 can be located The buffer member 140 is obscured by the convex portion of the stepped second support surface 132 between the concave portion of the stepped second support surface 132 and the convex portion of the stepped first sidewall 112. For another example, the convex and concave portions of the stepped second support surface 132 may be arranged in a direction away from the axis of the outer shaft 110, and the concave and convex portions of the stepped first sidewall 112 may be arranged in a direction away from the axis of the outer shaft 110. The buffer member 140 may be located between the convex portion of the stepped second support surface 132 and the concave portion of the stepped first sidewall 112, and the buffer member 140 may be obscured by the convex portion of the stepped first sidewall 112. The convex portion of the stepped third support surface 133 and the concave portion of the stepped second sidewall 113 are opposed to each other along the circumference of the outer shaft 110. The concave portion of the stepped third support surface 133 and the convex portion of the stepped second side wall 113 face each other along the circumferential direction of the outer shaft 110 .The buffer member 140 located between the third support surface 133 and the second side wall 113 can be located between the concave and convex portions of the third support surface 133 and the second side wall 113 close to the axis of the outer shaft 110, so as to facilitate hiding the buffer member 140 inside the scroll assembly 100 and increase the total contact area between the first support surface 131 or the outer peripheral side surface of the outer shaft 110 and the flexible display screen. For example, the concave and convex portions of the third support surface 133 with a stepped surface can be arranged in a direction away from the axis of the outer shaft 110, and the convex and concave portions of the second side wall 113 with a stepped surface can be arranged in a direction away from the axis of the outer shaft 110. The buffer member 140 can be located The buffer member 140 is blocked by the convex portion of the third support surface 133 with a stepped surface between the concave portion of the third support surface 133 with a stepped surface and the convex portion of the second side wall 113 with a stepped surface. For example, the convex portion and the concave portion of the third support surface 133 with a stepped surface may be arranged in a direction away from the axis of the outer shaft 110, and the concave portion and the convex portion of the second side wall 113 with a stepped surface may be arranged in a direction away from the axis of the outer shaft 110. The buffer member 140 may be located between the convex portion of the third support surface 133 with a stepped surface and the concave portion of the second side wall 113 with a stepped surface, and the buffer member 140 is blocked by the convex portion of the second side wall 113 with a stepped surface.

[0064] In some embodiments, as Figure 6 As shown, support member 130 includes a first section 136 and a second section 137. Second section 137 is located on the side of first section 136 away from the axis of outer shaft 110. First support surface 131 is provided on second section 137. Both first section 136 and second section 137 are arcuate structures, and the length of second section 137 along the circumference of outer shaft 110 is shorter than the length of first section 136 along the circumference of outer shaft 110. This is equivalent to the convex and concave portions of the stepped surface of support member 130 on both sides along the circumference of outer shaft 110 being arranged in a direction away from the axis of outer shaft 110. Second support surface 132 and third support surface 133 are provided on first section 136. The first end of buffer member 140 located on one side of support member 130 abuts against second support surface 132, while the first end of buffer member 140 located on the other side of support member 130 abuts against third support surface 133. In this embodiment, the support member 130 includes a first section 136 and a second section 137, wherein the first section 136 and the second section 137 are both arc-shaped structures and the length of the second section 137 along the circumference of the outer shaft 110 is smaller than the length of the first section 136 along the circumference of the outer shaft 110. Compared with the manner in which the support member 130 is an arc-shaped structure as a whole, the support member 130 in this embodiment can have a smaller volume, and accordingly, the weight of the support member 130 can be reduced, which is conducive to the lightweighting of the reel assembly 100.

[0065] Furthermore, the opening has a first sidewall 112 and a second sidewall 113 spaced apart along the circumference of the outer shaft 110. The surface of the first sidewall 112 forms a first stepped surface, while the surface of the second sidewall 113 forms a second stepped surface. The concave and convex portions of the first stepped surface are arranged sequentially in a direction away from the axis of the outer shaft 110, while the concave and convex portions of the second stepped surface are arranged sequentially in a direction away from the axis of the outer shaft 110. The second end of the buffer member 140 located on one side of the support member 130 abuts against the concave portion of the first stepped surface, while the second end of the buffer member 140 located on the other side of the support member 130 abuts against the concave portion of the second stepped surface. The second section 137 is located between the convex portion of the first stepped surface and the convex portion of the second stepped surface. The buffer member 140 may be obscured by the convex portions of the first and second stepped surfaces, which form stepped surfaces. In this embodiment, the sidewall of the opening is configured as a stepped surface, and the recessed portion of the stepped surface can serve as an abutment surface for the buffer member 140, thereby meeting the installation requirements of the buffer member 140. In addition, the stepped surface of the sidewall of the opening also makes the shape of the wall more compatible with the shape of the support member 130, thereby facilitating improved space utilization.

[0066] Figure 5 and Figure 6 The corresponding technical solution, compared with Figure 1 and Figure 3 The corresponding technical solution is equivalent to hiding the buffer member 140, which can increase the total contact area between the first support surface 131 or the outer peripheral side of the outer shaft 110 and the flexible display screen, and avoid the introduction of the support member 130 and the buffer member 140, which causes the effective contact surface between the scroll assembly 100 and the display screen to be too low.

[0067] In some embodiments, the support member 130 is slidably connected to the outer shaft 110. Optionally, the support member 130 is slidably connected to the outer shaft 110 on a side proximal to the axis of the outer shaft 110. This allows the support member 130 to move relative to the outer shaft 110 along the circumference of the outer shaft 110, thereby relieving stress by displacing the support member 130 relative to the outer shaft 110. Furthermore, the slidable connection between the support member 130 and the outer shaft 110 also helps improve the stability of the support member 130 during its movement relative to the outer shaft 110.

[0068] Optionally, the outer shaft 110 is a solid shaft so that the support member 130 can be slidably connected to the outer shaft 110. For example, a guide rail is provided on the outer shaft 110 (for example, a guide rail is provided at the bottom of the opening), and the guide rail can be a protrusion or groove (not shown) extending along the circumference of the outer shaft 110, and the support member 130 is provided with a groove or protrusion that fits concavely and convexly with the guide rail, so as to achieve a sliding connection of the support member 130 relative to the outer shaft 110 along the circumference of the outer shaft. For example, the guide rail can be a protrusion extending along the circumference of the outer shaft 110, and the support member 130 is provided with a groove that fits concavely and convexly with the guide rail. For another example, the guide rail can be a groove extending along the circumference of the outer shaft 110, and the support member 130 is provided with a protrusion that fits concavely and convexly with the guide rail.

[0069] Alternatively, the outer shaft 110 may be hollow, and the opening may be a groove that does not extend through the outer shaft in the radial direction of the outer shaft. The support member 130 may be slidably connected to the bottom of the opening. The bottom of the opening may be provided with a guide rail, which may be a protrusion or groove extending along the circumference of the outer shaft 110. The support member 130 may be provided with a groove or protrusion that engages with the guide rail, thereby achieving a slidable connection between the support member 130 and the outer shaft 110 along the circumference of the outer shaft.

[0070] In some embodiments, an accommodating chamber 111 is provided inside the outer shaft 110, and the opening is connected to the accommodating chamber 111. The opening is equivalent to a through hole that passes through the outer shaft in the radial direction of the outer shaft. The reel assembly 100 also includes an inner shaft 120, which is disposed in the accommodating chamber 111. The inner shaft 120 is configured to be rotatable relative to the outer shaft 110 and the support member 130 is fixedly connected to or integrally formed with the inner shaft 120, or the inner shaft 120 is fixedly connected to the outer shaft 110 and the support member 130 is slidably connected to the inner shaft 120 (for example, a guide rail is provided on the inner shaft 120, and the guide rail can be a protrusion or groove extending along the circumference of the inner shaft 120, and the support member 130 is provided with a groove or protrusion that is engaged with the guide rail to achieve a sliding connection of the support member 130 relative to the inner shaft 120). This arrangement allows the support member 130 to move relative to the outer shaft 110 along the circumference of the outer shaft 110, so that the support member 130 releases stress by shifting relative to the outer shaft 110. In addition, the connection between the support member 130 and the inner shaft 120 also helps to improve the stability of the support member 130 when it moves relative to the outer shaft 110.

[0071] Optionally, the axis of the inner shaft 120 coincides with the axis of the outer shaft 110. In this way, when the inner shaft 120 drives the support member 130 to rotate, the first support surface 131 and the outer surface of the outer shaft 110 are always in the same cylindrical surface, so that the outer contour of the scroll assembly 100 always remains cylindrical, which is beneficial to maintaining the flatness of the flexible display screen 200 wound thereon.

[0072] In some embodiments, as Figure 2As shown, the inner shaft 120 includes a shaft body 121 and a plurality of sliding portions 122 arranged on the shaft body 121 along the circumference of the inner shaft 120. The sliding portions 122 slide in grooves provided on the inner wall of the outer shaft 110. This allows the inner shaft 120 to have rotational freedom relative to the outer shaft 110. The inner shaft 120 can rotate relative to the outer shaft 110 around its axis.

[0073] Furthermore, the sliding groove may be an annular groove.

[0074] In other embodiments, Figure 7 、 Figure 8 As shown, the inner shaft 120 includes a shaft body 121 and rotationally engaging portions 123 disposed at both ends of the shaft body 121. The outer shaft 110 is further provided with retaining grooves located at opposite ends of the accommodating cavity 111 along the axial direction of the outer shaft 110. The rotationally engaging portions 123 rotatably engage in the retaining grooves. This allows the inner shaft 120 to have rotational freedom relative to the outer shaft 110. The inner shaft 120 can rotate relative to the outer shaft 110 about its axis.

[0075] Furthermore, the slot may be a cylindrical slot.

[0076] In some embodiments, the first supporting surface 131 is an arcuate surface that lies within the same cylindrical surface as the outer surface of the outer shaft 110. This ensures that, in the radial direction of the outer shaft 110, the first supporting surface 131 is neither lower than nor higher than the outer surface of the outer shaft 110. This ensures that there is no height difference between the portion of the flexible display 200 supported on the outer surface of the outer shaft 110 and the portion supported on the first supporting surface 131.

[0077] In some embodiments, the opening on the outer shaft 110 extends along the axis of the outer shaft 110. This configuration allows the opening to cover the width of the flexible display 200, thereby ensuring that the force applied to the flexible display 200 in the width direction (parallel to the axis of the outer shaft 110) is substantially uniform.

[0078] The embodiment of the second aspect of the present application proposes a scrolling display device (or sliding display device), referring to Figures 1 to 4 The scrollable display device includes the scroll assembly 100 of any of the above embodiments and a flexible display screen 200 wound around the scroll assembly 100. The outer shaft 110 is movable along the unfolding or retracting direction of the flexible display screen 200. The scrollable display device can be, for example, a monitor, television, digital camera, mobile phone, tablet computer, navigation system, or any other product or component with a display function.

[0079] The scrolling display device in the embodiment of the present application utilizes the scroll assembly 100 of the above-described embodiment. The support member 130 of the scroll assembly 100 is disposed at the opening of the outer shaft 110, and a buffer member 140 is disposed between the support member 130 and the outer shaft 110, thereby enabling relative movement between the support member 130 and the outer shaft 110. During the scrolling process, the portion of the flexible display 200 in contact with the scroll assembly 100 is partially supported by the outer surface of the outer shaft 110 and partially supported by the first support surface 131 of the support member 130. When significant stress is generated in the portion of the flexible display 200 in contact with the scroll assembly 100, the buffer member 140 deforms due to the stress on the support member. This allows the relative movement between the support member 130 and the outer shaft 110 to release the stress, thereby alleviating or avoiding stress concentration. This improves the stress conditions on the flexible display 200 and reduces the likelihood of film breakage, adhesive misalignment, or peeling.

[0080] In some embodiments, the scrolling display device further includes a main frame 300 and a frame 400, wherein the frame 400 is configured to move away from or toward the main frame 300 along a first direction (parallel to the unfolding direction or the stowing direction). One end of the flexible display 200 is connected to the main frame 300. Thus, by moving the frame 400 away from or toward the main frame 300, the scroll assembly 100 moves away from or toward the main frame 300, thereby driving the flexible display 200 to unfold or retract.

[0081] Furthermore, the roll-up display device includes a pulling assembly 500, which is connected to the other end of the flexible display 200 and is used to provide a force to tighten the flexible display 200. In other words, the pulling assembly 500 applies a pulling force to the other end of the flexible display 200, ensuring that the rolled-up portion of the flexible display 200 remains flat. This pulling force ensures that the flexible display 200 remains flat, whether transitioning from a rolled-up state to an unfolded state or vice versa, preventing warping or wrinkling of the flexible display 200.

[0082] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A reel assembly, characterized in that: include: An outer shaft, wherein an opening is provided on a peripheral side surface of the outer shaft; a support member, the support member being disposed at the opening, and a first support surface being disposed on a side of the support member away from the axis of the outer shaft; and a buffer member, the buffer member being disposed between the support member and the outer shaft, the buffer member being used to change the spacing between the support member and the side wall of the opening along the circumference of the outer shaft; The outer shaft is provided with an accommodating cavity inside, and the opening is communicated with the accommodating cavity; The reel assembly also includes an inner shaft, which is arranged in the accommodating cavity; the inner shaft is configured to be rotatable relative to the outer shaft and the support member is fixedly connected to the inner shaft or formed as one piece, or the inner shaft is fixedly connected to the outer shaft and the support member is slidably connected to the inner shaft.

2. The reel assembly according to claim 1, wherein: The number of the buffer members is at least two, and the buffer members are provided on both sides of the support member that are opposite to each other along the circumference of the outer shaft. The first end of the buffer member abuts against the support member, and the second end of the buffer member abuts against the outer shaft; the first end and the second end of the buffer member deviate from each other along the circumference of the outer shaft.

3. The reel assembly according to claim 2, wherein: The buffer member is a spring, a rubber body or a silicone body.

4. The reel assembly according to claim 2, wherein: The support member has a second support surface and a third support surface adjacent to the first support surface, and the second support surface and the third support surface are away from each other along the circumference of the outer shaft, wherein the first end of the buffer member located on one side of the support member abuts against the second support surface, and the first end of the buffer member located on the other side of the support member abuts against the third support surface.

5. The reel assembly according to claim 4, wherein: The opening has a first side wall and a second side wall arranged at intervals along the circumference of the outer shaft, wherein the second end of the buffer member located on one side of the support member abuts against the first side wall, and the second end of the buffer member located on the other side of the support member abuts against the second side wall.

6. The reel assembly according to claim 2, wherein: The support member is provided with a first accommodating groove and a second accommodating groove on two opposite sides along the circumference of the outer shaft, respectively. The buffer members located on both sides of the support member are respectively arranged in the first accommodating groove and the second accommodating groove.

7. The reel assembly according to claim 6, wherein: The opening has a first side wall and a second side wall arranged at intervals along the circumference of the outer shaft, a first protrusion is provided on the first side wall, and a second protrusion is provided on the second side wall, a portion of the first protrusion extends into the first accommodating groove and abuts against the second end of the buffer member in the first accommodating groove, and a portion of the second protrusion extends into the second accommodating groove and abuts against the second end of the buffer member in the second accommodating groove.

8. The reel assembly according to claim 2, wherein: The support member includes a first section and a second section, the second section is located on the side of the first section away from the axis of the outer shaft, the first support surface is arranged on the second section, the first section and the second section are both arc-shaped structures and the length of the second section along the circumference of the outer shaft is smaller than the length of the first section along the circumference of the outer shaft; the first section is provided with a second support surface and a third support surface; wherein the first end of the buffer member located on one side of the support member is against the second support surface, and the first end of the buffer member located on the other side of the support member is against the third support surface.

9. The reel assembly according to claim 8, wherein: The opening has a first side wall and a second side wall arranged at intervals along the circumference of the outer shaft, the wall surface of the first side wall is a first stepped surface, the wall surface of the second side wall is a second stepped surface, the concave portion and the convex portion of the first stepped surface are arranged in sequence along a direction away from the axis of the outer shaft; the concave portion and the convex portion of the second stepped surface are arranged in sequence along a direction away from the axis of the outer shaft, wherein the second end of the buffer member located on one side of the support member abuts against the concave portion of the first stepped surface, and the second end of the buffer member located on the other side of the support member abuts against the concave portion of the second stepped surface; The second section is located between the convex portion of the first step surface and the convex portion of the second step surface.

10. The reel assembly according to claim 1, wherein: The axis of the inner shaft coincides with the axis of the outer shaft.

11. The reel assembly according to claim 10, wherein: The inner shaft includes a shaft body and a plurality of sliding parts arranged on the shaft body along the circumference of the inner shaft, and a sliding groove is provided on the inner wall of the outer shaft, and the sliding parts are engaged with the sliding groove in a sliding manner; Alternatively, the inner shaft includes a shaft body and a rotating fitting portion arranged at both ends of the shaft body, and the interior of the outer shaft is further provided with a clamping groove located at the two opposite ends of the accommodating cavity along the axial direction of the outer shaft, and the rotating fitting portion is rotatably fitted in the clamping groove.

12. The reel assembly according to claim 1, wherein: The first supporting surface is an arc surface, and the arc surface and the outer surface of the outer shaft are located in the same cylindrical surface; and / or the opening extends along the axial direction of the outer shaft.

13. A scroll display device, characterized in that: The invention comprises a scroll assembly as claimed in any one of claims 1 to 12 and a flexible display screen wound around the scroll assembly.

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