Display device and telescopic mechanism therefor

Abstract

The embodiments of the present disclosure provide a display device and a telescopic mechanism therefor, which relate to the technical field of display. The telescopic mechanism comprises a fixed portion, a movable portion, and a telescopic assembly, wherein the telescopic assembly comprises a number m of foldable telescopic racks and m-1 balance connecting rod groups; two ends of each foldable telescopic rack are connected to the fixed portion and the movable portion, respectively; the m foldable telescopic racks are arranged at intervals in a first direction perpendicular to an expansion and contraction direction of the telescopic assembly; each balance connecting rod group is located between two adjacent foldable telescopic racks, and comprises at least one balance connecting rod; and two ends of each balance connecting rod are respectively connected to two adjacent foldable telescopic racks.

Description

Display device and telescopic mechanism thereof Technical Field

[0001] The embodiments of the present disclosure relate to the field of display technology, and in particular to a display device and a telescopic mechanism thereof. Background Art

[0002] The application of display devices is becoming more and more widespread, and has become one of the important tools in people's daily work and life. Sliding display devices are very popular among the public because of their portability and large display area.

[0003] Currently, a roll-up display device includes a flexible display and a telescopic mechanism that supports the flexible display. The telescopic mechanism includes a fixed portion, a movable portion, and a telescopic assembly. The fixed portion and the movable portion are respectively connected to opposite sides of the flexible display. The telescopic assembly is connected to the fixed portion and the movable portion at both ends. The telescopic assembly includes at least two foldable telescopic brackets, which are spaced apart and arranged perpendicular to the telescopic assembly's extension direction.

[0004] During the extension and retraction process of the telescopic assembly, the extension lengths of the two folding telescopic brackets may be inconsistent, causing the flexible display to tilt. When the flexible display tilts, it may hit the housing of the display device, affecting the user's operating experience on the one hand and the service life of the flexible display on the other.

[0005] Summary of the Invention

[0006] The disclosed embodiments provide a display device and its telescopic mechanism, which can improve the telescopic synchronization of a folding and telescopic frame, thereby improving the user's operating experience and increasing the service life of the flexible display. The technical solution is as follows:

[0007] On the one hand, an embodiment of the present disclosure provides a telescopic mechanism, which includes a fixed part, a movable part and a telescopic assembly, wherein the fixed part and the movable part are respectively used to connect to the opposite side edges of the flexible display screen; the telescopic assembly includes m folding telescopic frames and m-1 balancing link groups, wherein m is an integer and m is greater than; the two ends of the folding telescopic frame are respectively connected to the fixed part and the movable part, and the m folding telescopic frames are arranged at intervals in a first direction, and the first direction is perpendicular to the telescopic direction of the telescopic assembly; each of the balancing link groups is located between two adjacent folding telescopic frames among the m folding telescopic frames, and each of the balancing link groups includes at least one balancing link, and the two ends of each of the balancing links are respectively connected to the two adjacent folding telescopic frames, and the length direction of the balancing link is consistent with the first direction.

[0008] Optionally, the folding and telescopic frame includes a plurality of folding units connected in sequence along the telescopic direction, each of the folding units having a translation portion, and during the telescopic process of the folding and telescopic frame, the distance between the translation portion and the first center line of the telescopic assembly remains unchanged, and the length direction of the first center line is consistent with the telescopic direction; the balancing link is connected between a translation portion of the first folding unit and a translation portion of the second folding unit, and the first folding unit and the second folding unit are two adjacent folding units in the first direction.

[0009] In a possible embodiment, the m folding telescopic frames are divided into a first telescopic frame group and a second telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about the first center line; the first telescopic frame group includes a first folding telescopic frame and a second folding telescopic frame; the folding unit of the first folding telescopic frame is V-shaped and includes a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are connected by a first connecting part, and the second connecting rod is connected to one end of the first connecting rod of another folding unit of the first folding telescopic frame by a second connecting part; the second folding telescopic frame includes a third connecting rod and a fourth connecting rod, one end of the third connecting rod and one end of the fourth connecting rod are connected by a third connecting part, the third connecting rod is parallel to the first connecting rod, and the fourth connecting rod is parallel to the second connecting rod, and the fourth connecting rod is connected to one end of the third connecting rod of another folding unit of the second folding telescopic frame by a fourth connecting part; wherein, the third connecting part is the translation part of the first folding telescopic frame, and the fourth connecting part is the translation part of the second folding telescopic frame.

[0010] Optionally, the telescopic assembly further comprises at least one co-moving connecting rod, wherein the co-moving connecting rod is connected between the first connecting portion of the first folding telescopic frame and the second connecting portion of the second folding telescopic frame.

[0011] Optionally, any one of the first connecting part, the second connecting part, the third connecting part and the fourth connecting part includes a first connecting structure, a second connecting structure and a connecting plate, the first connecting structure and the second connecting structure are respectively fixedly connected to two adjacent connecting rods in the folding and telescopic frame, the first connecting structure and the second connecting structure are respectively hinged to the connecting plate, and the rotation axis of the first connecting structure and the second connecting structure relative to the connecting plate are perpendicular to the telescopic direction and the first direction.

[0012] Optionally, the outer side walls of the first connection structure and the second connection structure of at least one of the first connection part, the second connection part, the third connection part and the fourth connection part respectively have tooth structures, and the tooth structures of the first connection structure and the tooth structures of the second connection structure are engaged with each other.

[0013] In another possible embodiment, the m folding telescopic frames are divided into a first telescopic frame group and a second telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about the first center line; the first telescopic frame group includes a first folding telescopic frame, and the folding unit of the first folding telescopic frame includes a first connecting rod and a second connecting rod, the middle part of the first connecting rod and the middle part of the second connecting rod are hinged, and one end of the first connecting rod is hinged to one end of the second connecting rod of another folding unit of the first folding telescopic frame; wherein, the hinge between the middle part of the first connecting rod and the middle part of the second connecting rod is the translation part of the first folding telescopic frame.

[0014] In another possible embodiment, the m folding telescopic frames are divided into a first telescopic frame group, a second telescopic frame group and a third telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about the first center line; the first telescopic frame group includes a first folding telescopic frame, and the folding unit of the first folding telescopic frame includes a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are connected by a first connecting part, and the second connecting rod is connected to one end of the first connecting rod of another folding unit of the first folding telescopic frame through a second connecting part; the third telescopic frame group includes a third folding telescopic frame, and any folding unit of the third folding telescopic frame includes a third connecting rod and a fourth connecting rod, the middle part of the third connecting rod and the middle part of the fourth connecting rod are hinged, and one end of the third connecting rod is hinged to one end of the fourth connecting rod of another folding unit of the third folding telescopic frame; the second connecting part is the translation part of the first folding telescopic frame, and the hinge between the middle part of the third connecting rod and the middle part of the fourth connecting rod is the translation part of the third folding telescopic frame.

[0015] Optionally, in the telescopic direction, for any of the folding telescopic frames, one or more folding units exist between the first balancing link and the second balancing link, and the first balancing link and the second balancing link are two adjacent balancing links in the telescopic direction.

[0016] Optionally, the telescopic assembly further includes at least one magnet, and the middle portion of at least one of the balancing links is connected to the at least one magnet.

[0017] Optionally, the telescopic assembly further includes a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are respectively connected to the middle of the balance link, the first connecting rod and the second connecting rod are respectively located on both sides of the balance link in the telescopic direction, and the first connecting rod and the second connecting rod are spaced apart in the first direction; the at least one magnet includes a first magnet and a second magnet, the first connecting rod is connected to the first magnet, and the second connecting rod is connected to the second magnet.

[0018] Optionally, the surface of the first connecting rod close to the flexible display screen has a first mounting groove, and the first magnet is located in the first mounting groove; the surface of the second connecting rod close to the flexible display screen has a second mounting groove, and the second magnet is located in the second mounting groove.

[0019] Optionally, the telescopic mechanism also includes two telescopic slide rails, which are located on both sides of the folding and telescopic assembly in the first direction; the telescopic slide rail includes a plurality of guide rails, which include a first fixed guide rail, a second fixed guide rail and at least one intermediate guide rail, and the at least one intermediate guide rail is sequentially connected between the first fixed guide rail and the second fixed guide rail, the first fixed guide rail is connected to the fixed part, and the second fixed guide rail is connected to the movable part; the intermediate guide rail and the second fixed guide rail both include a guide rail body and a limiting part, and the guide rail body has a slide groove, and the limiting part and the slide groove are respectively located on opposite sides of the guide rail body; the limiting part of the first guide rail is located in the slide groove of the second guide rail, and the first guide rail and the second guide rail are two connected guide rails among the plurality of guide rails.

[0020] Optionally, the maximum dimension of the limiting portion of the first guide rail in the second direction is a first dimension, the dimension of the opening of the sliding slot of the second guide rail in the second direction is a second dimension, and the first dimension is larger than the second dimension; the second direction is perpendicular to the telescopic direction and the first direction.

[0021] Optionally, the first side surface of the limiting portion has a card slot, the first side surface is the side surface of the limiting portion away from the guide rail body, and the card slot extends from one end of the limiting portion to the other end of the limiting portion; the bottom of the sliding groove has a protruding structure, and the protruding structure is located in the card slot and at the end of the sliding groove close to the first fixed guide rail.

[0022] Optionally, the telescopic mechanism also includes a rear shell, and the telescopic assembly is located in the rear shell; the rear shell includes a plurality of sub-shells, and the sub-shells include a bottom plate and two side plates, and the two side plates are respectively connected to opposite sides of the bottom plate; the plurality of sub-shells include a first stator sub-shell, a second stator sub-shell and at least one intermediate sub-shell, the first stator sub-shell is connected to the fixed part, the second stator sub-shell is connected to the movable part, and the at least one intermediate sub-shell is sequentially connected between the first stator sub-shell and the second stator shell.

[0023] Optionally, a first guide structure is provided on the inner wall of the first side plate of the first sub-shell, and a second guide structure is provided on the outer wall of the first side plate of the second sub-shell, the inner wall and the outer wall are at least partially opposite, the first guide structure and the second guide structure match, and the first sub-shell and the second sub-shell are two connected sub-shells among the multiple sub-shells.

[0024] Optionally, the first guide structure is a guide groove, and the length direction of the guide groove is consistent with the telescopic direction; the second guide structure is a guide protrusion, and the guide protrusion is located in the guide groove.

[0025] Optionally, a bottom surface of the bottom plate of the second stator housing has a protrusion, and the bottom surface is a side of the bottom plate away from the flexible display panel;

[0026] The side edges of the bottom plate of the first stator housing and the side edges of the bottom plate of the at least one intermediate housing both have avoidance openings matching the protrusions.

[0027] On the other hand, an embodiment of the present disclosure further provides a display device, comprising a flexible display screen and any one of the aforementioned telescopic mechanisms, wherein the flexible display screen is connected to the telescopic mechanism.

[0028] The beneficial effects of the technical solution provided by the present disclosure include at least:

[0029] The m folding and telescopic frames are connected at both ends to a movable portion and a fixed portion, respectively. When the movable portion moves relative to the fixed portion, it can drive the m folding and telescopic frames to extend or contract, thereby achieving the telescopic function of the telescopic mechanism. A balancing linkage group is provided between any two adjacent folding and telescopic frames. Each balancing linkage group includes at least one balancing linkage. The ends of each balancing linkage are connected to the two adjacent folding and telescopic frames, and the length direction of each balancing linkage aligns with the first direction. This improves the synchronization of the extension and contraction of the m folding and telescopic frames and reduces the possibility of tilting between adjacent folding and telescopic frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] FIG1 is a schematic structural diagram of a display device in a first state according to an embodiment of the present disclosure;

[0032] FIG2 is a schematic structural diagram of a display device in a second state according to an embodiment of the present disclosure;

[0033] FIG3 is a schematic diagram of the exploded perspective structure of the display device in FIG2 ;

[0034] FIG4 is a schematic structural diagram of a telescopic assembly provided by an embodiment of the present disclosure in an expanded state;

[0035] FIG5 is a structural diagram of a folding telescopic frame when the telescopic assembly is in an unfolded state provided by an embodiment of the present disclosure;

[0036] FIG6 is a schematic structural diagram of the foldable telescopic frame of the structure shown in FIG5 when the telescopic assembly is in a retracted state;

[0037] FIG7 is a schematic structural diagram of a connecting portion provided by an embodiment of the present disclosure;

[0038] FIG8 is a schematic structural diagram of another connecting portion provided by an embodiment of the present disclosure;

[0039] FIG9 is a schematic structural diagram of a balancing link provided by an embodiment of the present disclosure;

[0040] FIG10 is a schematic structural diagram of another telescopic assembly provided in an embodiment of the present disclosure;

[0041] FIG11 is a schematic structural diagram of another telescopic assembly provided in an embodiment of the present disclosure;

[0042] FIG12 is a schematic structural diagram of another telescopic assembly provided in an embodiment of the present disclosure;

[0043] FIG13 is a schematic cross-sectional view of a telescopic slide rail according to an embodiment of the present disclosure;

[0044] FIG14 is a schematic diagram of a three-dimensional structure of a guide rail provided by an embodiment of the present disclosure at an angle;

[0045] FIG15 is a schematic diagram of the three-dimensional structure of the guide rail in FIG14 from another angle;

[0046] FIG16 is a schematic cross-sectional view of a guide rail body of one guide rail and a limiting portion of another guide rail provided in an embodiment of the present disclosure;

[0047] FIG17 is a schematic structural diagram of the rear housing provided in an embodiment of the present disclosure when in an expanded state;

[0048] FIG18 is a schematic diagram of the cross-sectional structure of the rear housing along line AA in FIG17;

[0049] FIG19 is an enlarged structural diagram of portion E in FIG18 . DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0051] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be the ordinary meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second", "third" and similar words used in the patent application specification and claims of this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "a" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects.

[0052] Figure 1 is a schematic diagram of the structure of a display device in a first state according to an embodiment of the present disclosure. Figure 2 is a schematic diagram of the structure of a display device in a second state according to an embodiment of the present disclosure. As shown in Figures 1 and 2, the display device includes a flexible display 10 and a retractable mechanism 20. The retractable mechanism 20 supports the flexible display 10.

[0053] When the display device is in the first state, the retractable mechanism 20 is retracted and the flexible display screen 10 is at least partially stored in the retractable mechanism 20. At this time, the volume of the display device is small. The first state can be called a retracted state or a closed state.

[0054] When the display device is in the second state, the retractable mechanism 20 is unfolded and the flexible display screen 10 is flattened on the retractable mechanism 20, and the display area of ​​the display device becomes larger. The second state can be called an unfolded state or an open state.

[0055] For example, when the display device is in the second state, the display area of ​​the flexible display screen 10 is n times the area of ​​the display area of ​​the flexible display screen 10 when the display device is in the first state, where n is greater than 1. For example, n is equal to 2 or 3. In other words, when the display device is in the first state, (n-1) / n of the flexible display screen 10 can be stored in the retractable mechanism 20, leaving 1 / n exposed. In this case, the display device functions as a small-sized display device for viewing by the user.

[0056] Figure 3 is a schematic diagram of the exploded perspective structure of a display device provided by an embodiment of the present disclosure. As shown in Figure 3, the flexible display screen 10 includes a flexible display panel 11 and a support member 12. The flexible display panel 11 has a display surface and a non-display surface facing each other. The support member 12 is located on the non-display surface and is used to support the flexible display panel 12.

[0057] When the display device is in the first state, a portion of the flexible display panel 11 and a portion of the support member 12 are both stored in the telescopic mechanism 20. When the display device is in the second state, the flexible display panel 11 and the support member 12 are both laid flat on the unfolded telescopic mechanism 20.

[0058] In the embodiment of the present disclosure, there is no limitation on the type of the flexible display panel 11 , which may be an OLED (Organic Light-Emitting Diode) display panel, etc.

[0059] Exemplarily, the support member 12 may be made of a metal material, such as stainless steel.

[0060] In some examples, the support member 12 includes a plurality of support plates (not shown) arranged in sequence along the telescopic direction x of the telescopic mechanism 20, and any two adjacent support plates are hinged, so that they can be stored in the telescopic mechanism 20 together with the flexible display panel 11, and can also support the flat flexible display panel 11.

[0061] The telescopic mechanism 20 includes a fixed portion 21, a movable portion 22, and a telescopic assembly 23. The fixed portion 21 and the movable portion 22 are respectively connected to opposite sides of the flexible display 10. The telescopic assembly 23 is located between the fixed portion 21 and the movable portion 22 and is connected to both the fixed portion 21 and the movable portion 22. The telescopic assembly 23 has a telescopic function, which can move the fixed portion 21 and the movable portion 22 toward or away from each other.

[0062] Exemplarily, the fixing portion 21 has an accommodating space therein for accommodating the flexible display screen 10 .

[0063] In some examples, a winding assembly is provided in the accommodation space for winding up the flexible display screen 10. For example, the winding assembly includes two reels 211a and 211b, which are arranged in parallel and spaced apart. The axial direction of reel 211a is perpendicular to the extension direction x of the telescopic assembly 23. Reel 211a is used to wind up the flexible display panel 11, and reel 211b is used to wind up the support member 12.

[0064] In the related art, the telescopic assembly includes a plurality of folding telescopic frames, which are spaced apart in a first direction y, and the first direction y is perpendicular to the telescopic direction x of the telescopic assembly and is consistent with the axial direction of the scroll 211a. Due to the assembly gaps between the various components of the display device, during the telescopic assembly, the telescopic extension and contraction of the various folding telescopic frames may be asynchronous, resulting in inconsistent lengths of the various folding telescopic frames. This situation may cause the flexible display to tilt. If the tilt is severe, the flexible display will collide with the housing of the display device, affecting the service life of the flexible display. In addition, when the flexible display collides with the housing of the display device, the telescopic mechanism's telescopic process will be stuck, affecting the user's operating experience.

[0065] To this end, the disclosed embodiment provides at least one balancing link between adjacent folding and telescopic frames, with the length of the balancing link aligned with the first direction y. This improves the synchronization of the extension and retraction of the m folding and telescopic frames, ensuring a more consistent length of the folding and telescopic frames. This reduces the likelihood of collision between the flexible display and the display device housing, thereby extending the service life of the flexible display and enhancing the user experience.

[0066] FIG4 is a schematic structural diagram of a telescopic assembly provided by an embodiment of the present disclosure when in an expanded state. As shown in FIG4 , the telescopic assembly 23 includes m folding telescopic frames 231 and m-1 balancing link groups, where m is an integer and m is greater than 1. The m folding telescopic frames 231 are spaced apart in a first direction y. Each balancing link group is located between two adjacent folding telescopic frames 231, and one balancing link group is provided between each two adjacent folding telescopic frames 231. For example, in FIG4 , m is equal to 4, and a total of three balancing link groups are arranged between the four folding telescopic frames 231. From top to bottom, the first balancing link group is located between the first folding telescopic frame 231 and the second folding telescopic frame 231, the second balancing link group is located between the second folding telescopic frame 231 and the third folding telescopic frame 231, and the third balancing link group is located between the third folding telescopic frame 231 and the fourth folding telescopic frame 231.

[0067] Each balancing link group includes at least one balancing link 232. Both ends of each balancing link 232 are respectively connected to two adjacent folding and telescopic frames 231, and the length direction of the balancing link 232 is consistent with the first direction y.

[0068] In the embodiment of the present disclosure, the length direction of the balancing link 232 being consistent with the first direction y may mean that when the lengths of the m folding and telescopic frames 231 in the telescopic direction x are the same, the length direction of the balancing link 232 is consistent with the first direction y.

[0069] Optionally, the telescopic assembly 23 further includes a fixed portion middle frame 211 and a movable portion middle frame 221. At least a portion of the fixed portion middle frame 211 is located within the housing of the fixed portion 21, while at least a portion of the movable portion middle frame 221 is located within the housing of the movable portion 22. The ends of the folding and telescopic frame 231 are respectively connected to the fixed portion middle frame 211 and the movable portion middle frame 221, thereby respectively connecting the ends of the folding and telescopic frame 231 to the fixed portion 21 and the movable portion 22.

[0070] In other embodiments, both ends of the folding and telescopic frame 231 may also be connected to the housing of the fixed portion 21 and the housing of the movable portion 22 via fasteners (such as bolts, etc.).

[0071] As shown in Figure 4, the telescopic assembly 23 includes four folding telescopic frames 231. The embodiment of the present disclosure does not limit the number of folding telescopic frames 231, and can be adjusted according to the actual size of the flexible display screen, for example, it can be 2, 3, 5 or 6.

[0072] Figure 5 is a schematic diagram of the structure of a foldable telescopic frame provided by an embodiment of the present disclosure, when the telescopic assembly is in an extended state. Figure 6 is a schematic diagram of the structure of a foldable telescopic frame, when the telescopic assembly shown in Figure 5 is in a retracted state. In Figures 5 and 6, the four foldable telescopic frames, in order from top to bottom, are the second foldable telescopic frame 231b, the first foldable telescopic frame 231a, the third foldable telescopic frame 231c, and the fourth foldable telescopic frame 231d.

[0073] The four foldable and telescopic frames are divided into a first and second foldable and telescopic frame groups. The first and second foldable and telescopic frame groups are arranged symmetrically about the first centerline O of the telescopic assembly 23. The length of the first centerline O coincides with the telescopic direction x of the telescopic assembly 23. Specifically, the first foldable and telescopic frame 231a is the foldable and telescopic frame in the first telescopic frame group closest to the first centerline O, and the third foldable and telescopic frame 231c is the foldable and telescopic frame in the second telescopic frame group closest to the first centerline O. The third foldable and telescopic frame 231c is arranged symmetrically with the first foldable and telescopic frame 231a about the first centerline O. The fourth foldable and telescopic frame 231d and the second foldable and telescopic frame 231b are arranged symmetrically about the first centerline O.

[0074] Illustratively, each folding and telescopic frame 231 includes a plurality of folding units 2310 sequentially connected along a telescopic direction x. Each folding unit 2310 has a translation portion 2310a. During the telescopic process of the folding and telescopic frame 231, the distance between the translation portion 2310a and the first centerline O of the telescopic assembly 23 remains unchanged, and displacement occurs only in the telescopic direction x.

[0075] The balancing link 232 is connected between a translation portion 2310a of a first folding unit and a translation portion 2310a of a second folding unit. The first and second folding units belong to two adjacent folding and telescopic frames 231, respectively, and are adjacent in the first direction y. Ideally, the distance between the translation portions 2310a of two adjacent folding units in the first direction y does not change during the extension and retraction of the folding and telescopic frames 231. Therefore, positioning the balancing link 232 between the translation portions 2310a of the two adjacent folding units 2310 facilitates synchronous extension and retraction of the two folding units 2310 connected by the balancing link 232.

[0076] In some examples, the folding unit 2310 of the first folding telescopic frame 231a is V-shaped and includes a first link 1a and a second link 1b, one end of the first link 1a and one end of the second link 1b are connected by a first connecting portion, and the second link 1b is connected to one end of the first link 1a of another folding unit 2310 of the first folding telescopic frame 231a through a second connecting portion.

[0077] The second foldable telescopic frame 231b includes a third link 1c and a fourth link 1d. One end of the third link 1c is connected to one end of the fourth link 1d via a third connecting portion. The fourth link 1d is connected to one end of the third link 1c of another folding unit of the second foldable telescopic frame 231b via a fourth connecting portion. The third link 1c is parallel to the first link 1a, and the fourth link 1d is parallel to the second link 1b.

[0078] In some examples, the structure of the second folding and telescopic frame 231 b is the same as that of the first folding and telescopic frame 231 a and can be obtained by translating the first folding and telescopic frame 231 a.

[0079] With reference to Figures 5 and 6 , when each foldable and telescopic frame 231 is in the extended state, the distance between the third connection portion and the first centerline O is h; when each foldable and telescopic frame 231 is in the folded state, the distance between the third connection portion and the first centerline O is also h. As can be seen, the distance of the third connection portion relative to the first centerline O remains unchanged during the extension and retraction of the telescopic assembly 23. Therefore, the third connection portion of the first foldable and telescopic frame 231a serves as the translational portion of the first foldable and telescopic frame 231a. Similarly, the fourth connection portion of the second foldable and telescopic frame 231b serves as the translational portion of the second foldable and telescopic frame 231b.

[0080] The folding unit 2310 of the third folding telescopic frame 231c is V-shaped and includes a first link 1a and a second link 1b, one end of the first link 1a and one end of the second link 1b are connected through a first connecting portion, and the second link 1b is connected to one end of the first link 1a of another folding unit 2310 of the first folding telescopic frame 231c through a second connecting portion.

[0081] The fourth foldable telescopic frame 231d includes a third link 1c and a fourth link 1d. One end of the third link 1c is connected to one end of the fourth link 1d via a third connecting portion. The fourth link 1d is also connected to one end of the third link 1c of the other folding unit 2310 of the fourth foldable telescopic frame 231d via a fourth connecting portion. The third link 1c is parallel to the first link 1a, and the fourth link 1d is parallel to the second link 1b. The structure of the third foldable telescopic frame 231c is identical to that of the first foldable telescopic frame 231a and can be achieved by translation of the fourth foldable telescopic frame 231d.

[0082] The third connection portion of the third foldable telescopic frame 231c is the translation portion of the third foldable telescopic frame 231c. Similarly, the fourth connection portion of the fourth foldable telescopic frame 231d is the translation portion of the fourth foldable telescopic frame 231d.

[0083] FIG7 is a schematic diagram of the structure of a connection portion provided in an embodiment of the present disclosure. As shown in FIG7 , the connection portion includes a first connection structure 2a, a second connection structure 2b, and a connection plate 2c. The first connection structure 2a and the second connection structure 2b are respectively fixedly connected to two adjacent connecting rods in the folding and telescopic frame 231. The first connection structure 2a and the second connection structure 2b are respectively hinged to the connection plate 2c, and the rotation axes of the first connection structure 2a and the second connection structure 2b relative to the connection plate 2c are both perpendicular to the telescopic direction x and the first direction y, that is, the rotation axis of the connection plate 2c extends along the second direction z.

[0084] Illustratively, the first connecting structure 2a includes two lugs 21a, which are parallel to each other and spaced apart in the second direction z. The second connecting structure 2b also includes two lugs 21b, which are parallel to each other and spaced apart in the second direction z. The two lugs 21a of the first connecting structure 2a are connected to one end of a connecting rod. The two lugs 21b of the second connecting structure 2b are connected to one end of another connecting rod. Illustratively, the two lugs 21a and the connected connecting rod can be integrally formed. A portion of the connecting plate 2c is located between the two lugs 21a, and another portion of the connecting plate 2c is located between the two lugs 21b.

[0085] The two ear plates 21a of the first connecting structure 2a and the two ear plates 21b of the second connecting part 2b respectively have axial holes, and the connecting plate 2c has a first axial hole c1 (see Figure 9) that matches the first connecting structure 2a and a second axial hole c2 (see Figure 9) that matches the second connecting structure 2b.

[0086] A first hinge shaft is provided within the axial hole and first axial hole c1 in the ear plate 21a of the first connecting structure 2a. The first hinge shaft is interference-fitted or fixedly connected with the axial hole in the ear plate 21a to securely connect the ear plate 21a of the first connecting structure 2a to the first hinge shaft. The hinge shaft is clearance-fitted with the first axial hole c1 on the connecting plate 2c, allowing the first hinge shaft to rotate within the first axial hole c1 of the connecting plate 2c. A second hinge shaft is provided within the axial hole and second axial hole c2 in the ear plate 21b of the second connecting structure 2b. The second hinge shaft is interference-fitted or fixedly connected with the axial hole in the ear plate 21b to securely connect the ear plate of the second connecting structure 2b to the second hinge shaft. The second hinge shaft is clearance-fitted with the second axial hole c2 on the connecting plate 2c, allowing the second hinge shaft to rotate within the second axial hole c2 of the connecting plate 2c.

[0087] For example, the outer sidewall of the lug of the first connecting structure 2a includes a first portion and a second portion, which are circumferentially connected. The first portion is planar and coplanar with the first side surface of the connecting rod connected to the first connecting structure 2a. The outer sidewall of the lug of the second connecting structure 2b also includes a first portion and a second portion, which are circumferentially connected. The first portion is planar and coplanar with the first side surface of the connecting rod connected to the second connecting portion. The first side surfaces of the two connecting rods are coplanar.

[0088] The second portion of the outer side wall of the ear plate of the first connection structure 2a and the second portion of the outer side wall of the second connection structure 2b are both arc surfaces and are tangent to each other.

[0089] The outer sidewalls of the first connecting structure 2a and the second connecting structure 2b each have a tooth structure 2d. The tooth structures 2d of the first connecting structure 2a and the tooth structures 2d of the second connecting structure 2b mesh with each other. Because the tooth structures 2d of the first connecting structure 2a and the tooth structures 2d of the second connecting structure 2b mesh with each other, during the extension and retraction of the folding and telescopic frame 231, the two connecting rods connected by the connection portion shown in Figure 8 can be opened and closed synchronously, so that the axis of symmetry between the two connecting rods is always arranged along the first direction x.

[0090] For example, the tooth structure 2d can be provided on the second portion of the two lugs 21a of the first connecting structure 2a, or on the second portion of either lug 21a of the first connecting structure 2a. The tooth structure 2d of the second connecting structure 2b is provided correspondingly to the tooth structure 2d of the first connecting structure 2a.

[0091] Fig. 8 is a schematic diagram of the structure of another connecting portion provided by an embodiment of the present disclosure. As shown in Fig. 8 , the connecting portion is based on the structure of the connecting portion shown in Fig. 7 , but the tooth structure 2d is removed.

[0092] Alternatively, in the structure shown in FIG7 , the second hinge shaft and the second axial hole c2 of the connecting plate 2c may have either a clearance fit or an interference fit, as long as the second hinge shaft can rotate within the second axial hole c2 of the connecting plate 2c under the action of an external force. When the second hinge shaft and the second axial hole c2 of the connecting plate 2c have an interference fit, this provides stop-and-go damping for the telescopic assembly, facilitating stepless adjustment of the display area of ​​the flexible display 10.

[0093] In some examples, the aforementioned first connection portion, second connection portion, third connection portion, and fourth connection portion may all adopt the structure of the connection portion shown in FIG. 7 , or may all adopt the structure of the connection portion shown in FIG. 8 .

[0094] In some other examples, some of the first, second, third, and fourth connecting portions adopt the structure of the connecting portion shown in Figure 7, while others adopt the structure of the connecting portion shown in Figure 8. For example, the first and second connecting portions adopt the structure of the connecting portion shown in Figure 8, while the third and fourth connecting portions adopt the structure of the connecting portion shown in Figure 7.

[0095] If all connecting parts adopt the structure of the connecting part shown in Figure 8, the assembly precision requirement is high because the corresponding tooth structures need to be meshed with each other. Therefore, the structure of the connecting part shown in Figure 7 is used in conjunction with the connecting part shown in Figure 8 to reduce the assembly precision requirement on the one hand and maintain the synchronization of the opening and closing of the connected connecting rods on the other hand.

[0096] In the disclosed embodiment, the third connection portion of the first foldable telescopic frame 231a is connected to the third connection portion of the third foldable telescopic frame 231c via a balancing link 232. The third connection portion of the first foldable telescopic frame 231a is connected to the fourth connection portion of the second foldable telescopic frame 231b via a balancing link 232. The third connection portion of the third foldable telescopic frame 231a is connected to the fourth connection portion of the fourth foldable telescopic frame 231d via a balancing link 232.

[0097] Optionally, in this embodiment, the number of balancing links included in each balancing link group can be the same. For example, the balancing link group between the first folding and telescopic frame 231a and the second folding and telescopic frame 231b, the balancing link group between the third folding and telescopic frame 231c and the fourth folding and telescopic frame 231d, and the balancing link group between the first folding and telescopic frame 231a and the third folding and telescopic frame 231c each include three balancing links 232.

[0098] In this embodiment, in the telescopic direction x, for any folding and telescopic frame 231, one or more folding units 2310 exist between the first and second balancing links. The first and second balancing links are two adjacent balancing links 232 in the same balancing link group in the telescopic direction x. For example, in Figure 5, there is one folding unit 2310 between the first and second balancing links. For another example, in Figure 10, from top to bottom, for the first and third balancing link groups, there is one folding unit 2310 between the first and second balancing links; for the second balancing link group, there are two folding units 2310 between the first and second balancing links.

[0099] Optionally, the plurality of balancing links 232 connecting all adjacent translation portions in the first direction y are integrally structured. For example, the balancing link 232 between the third connection portion of the first folding and telescopic frame 231a and the third connection portion of the third folding and telescopic frame 231c, the balancing link 232 between the third connection portion of the first folding and telescopic frame 231a and the fourth connection portion of the second folding and telescopic frame 231b, and the balancing link 232 between the third connection portion of the third folding and telescopic frame 231a and the fourth connection portion of the fourth folding and telescopic frame 231d are integrally structured.

[0100] On the one hand, the integrated balancing link can connect all the folding telescopic frames together, which is conducive to further improving the telescopic synchronization of each folding telescopic frame; on the other hand, it can reduce the assembly difficulty of the telescopic mechanism and improve the assembly efficiency.

[0101] Figure 9 is a schematic diagram of the structure of a balancing link provided by an embodiment of the present disclosure. As shown in Figure 9, the balancing link is divided into three sections. The first section x1 is located between the fourth connection portion of the second foldable and telescopic frame 231b and the third connection portion of the first foldable and telescopic frame 231a. The second section x2 is located between the third connection portion of the first foldable and telescopic frame 231a and the third connection portion of the third foldable and telescopic frame 231c. The third section x3 is located between the third connection portion of the third foldable and telescopic frame 231c and the fourth connection portion of the fourth foldable and telescopic frame 231d.

[0102] For example, the connecting plates of all the connecting parts arranged in sequence in the x direction and the balancing link 232 are all integrated structures. In this way, the number of parts in the telescopic mechanism can be reduced and the difficulty of assembly can be reduced.

[0103] In the embodiment of the present disclosure, the sides of each connecting portion and each connecting rod (including the first to fourth connecting rods, the balancing connecting rod and the synchronous connecting rod) facing the flexible display are flush to provide better support for the flexible display.

[0104] It should be noted that in Figures 4 to 6, an example is shown in which the telescopic assembly 23 includes four folding and telescopic frames 231. In actual applications, the number of folding and telescopic frames 231 can be set according to actual needs, for example, 6, 8, etc. Correspondingly, the number of folding and telescopic frames 231 included in each folding and telescopic frame group can be 3, 4, etc.

[0105] In the disclosed embodiment, as shown in Figures 5 and 6 , the telescopic assembly 23 further includes at least one magnet 234, which is connected to the middle portion of at least one balancing link 232. The magnet 234 can attract the support member 12 of the flexible display 10, preventing the flexible display 10 from buckling and improving the flatness of the flexible display 10, thereby enhancing the display quality.

[0106] In the embodiment of the present disclosure, the middle portion of each balancing link 232 intersecting the first center line O is connected to a magnet 234. In other embodiments, the middle portion of some of the balancing links 232 intersecting the first center line O is connected to a magnet 234.

[0107] Optionally, the middle portion of the balancing link 232 that does not intersect the first center line O (ie, the balancing link 232 located on both sides of the first center line O) may be connected to the magnet 234 or not be connected to the magnet 234 .

[0108] Optionally, as shown in Figure 9, the telescopic assembly 23 further includes a first connecting rod 232a and a second connecting rod 232b. One end of the first connecting rod 232a and one end of the second connecting rod 232b are respectively connected to the middle portion of the balancing link 232. The first connecting rod 232a and the second connecting rod 232b are located on either side of the balancing link 232 in the telescopic direction. For example, the first connecting rod 232a is located on the left side of the corresponding balancing link 232, and the second connecting rod 232b is located on the right side of the corresponding balancing link 232. The lengths of the first connecting rod 232a and the second connecting rod 232b are aligned with the telescopic direction x. The first connecting rod 232a and the second connecting rod 232b are spaced apart in the first direction y. For example, as shown in Figures 4 and 5, in the x-direction, the first connecting rod 232a is located below the second connecting rod 232b. Exemplarily, as shown in Figures 4 and 5, the first connecting rod 232a is located below the first centerline O, and the second connecting rod 232b is located above the first centerline O.

[0109] In the embodiment of the present disclosure, the first connecting rod 232a is connected to the first magnet, and the second connecting rod 232b is connected to the second magnet.

[0110] Because the first and second connecting rods are spaced apart in the first direction y, when the m foldable and telescopic frames are folded, the first and second connecting rods are staggered, which does not affect the folding function of the foldable and telescopic frames. When the m foldable and telescopic frames are deployed, the first and second connecting rods 232a, 232b are located on either side of the balancing link 232 in the telescopic direction. Therefore, the flexible display can be simultaneously attracted to both sides of the balancing link 232, thereby increasing the coverage length of the magnets in the telescopic direction x and improving the flatness of the flexible display.

[0111] In other embodiments, the telescopic assembly 23 may include only one of the first connecting rod 232a and the second connecting rod 232b.

[0112] Optionally, the first connecting rod 232a has a first mounting groove 232c on its surface proximate to the flexible display screen, with the first magnet positioned within the first mounting groove 232c. The second connecting rod 232b has a second mounting groove 232d on its surface proximate to the flexible display screen, with the second magnet positioned within the second mounting groove 232d. Both the first and second magnets are positioned in corresponding mounting grooves, facilitating installation.

[0113] When implemented, the surface of the first magnet is flush with the surface of the first connecting rod, and the surface of the second magnet is flush with the surface of the second connecting rod. In this way, the entire surface of the telescopic assembly is flat.

[0114] Optionally, referring again to Figures 5 and 6, the telescopic assembly further includes a plurality of synchronized connecting rods 233. Between the first connecting portion of the first folding telescopic frame 231a and the second connecting portion of the second folding telescopic frame 231b, during the telescopic movement of the telescopic assembly 23, the first and second connecting portions will move in both the telescopic and first directions, but the distance between the first and second connecting portions will not change. Therefore, synchronized connecting rods can be provided between the first and second connecting portions without affecting the telescopic movement of the telescopic assembly while improving the synchronization of the movement of the first and second connecting portions.

[0115] Figure 10 is a schematic diagram of the structure of another telescopic assembly provided by an embodiment of the present disclosure. The difference from the telescopic assembly shown in Figure 5 is the different arrangement of the balancing links 232. As shown in Figure 10, different balancing link groups contain different numbers of balancing links 232.

[0116] For example, the balancing link group between the first folding telescopic frame 231a and the second folding telescopic frame 231b includes three balancing links 232, the balancing link group between the third folding telescopic frame 231c and the fourth folding telescopic frame 231d includes three balancing links 232, and the balancing link group between the first folding telescopic frame 231a and the third folding telescopic frame 231c includes one balancing link 232.

[0117] The number of balancing links included in each balancing link group can be set according to actual needs, as long as the telescopic synchronization of each folding and telescopic frame can be improved and the flexible display screen can be stably supported.

[0118] Figure 11 is a schematic diagram of the structure of another telescopic assembly provided by an embodiment of the present disclosure. As shown in Figure 11, the telescopic assembly 23 includes a first telescopic frame group and a second telescopic frame group, which are symmetrically arranged about a first center line O.

[0119] The first telescopic frame group includes a first folding telescopic frame 231a, the first folding telescopic frame 231a includes a plurality of folding units 3210 connected in sequence along the telescopic direction x, each folding unit 2310 is X-shaped and includes a first link 1a and a second link 1b, the middle part of the first link 1a and the middle part of the second link 1b are hinged, and one end of the first link 1a is hinged to one end of the second link 1b of another folding unit 2310 of the first folding telescopic frame 231a.

[0120] The second telescopic frame assembly includes a second folding telescopic frame 231b. The structure of the second folding telescopic frame 231b is identical to that of the first folding telescopic frame 231a. The folding unit 2310 of the second folding telescopic frame 231b includes a first connecting rod 1a and a second connecting rod 1b. The middle portion of the first connecting rod 1a and the middle portion of the second connecting rod 1b are hingedly connected. One end of the first connecting rod 1a is hingedly connected to one end of the second connecting rod 1b of the other folding unit 2310 of the first folding telescopic frame 231b.

[0121] The hinged portion between the middle portion of the first connecting rod 1a and the middle portion of the second connecting rod 1b serves as the translation portion of the first folding and telescopic frame 231a and the second folding and telescopic frame 232b.

[0122] In FIG. 11 , the telescopic assembly 23 includes a balancing link group, which is located between the first folding telescopic frame 231 a and the second folding telescopic frame 231 b and includes a plurality of balancing links 232 .

[0123] Exemplarily, the number of the balancing links 232 included in the balancing link group is equal to the number of the folding units 2310 in the first folding and telescopic frame 231 a.

[0124] Figure 12 is a schematic diagram of the structure of another telescopic assembly provided by an embodiment of the present disclosure. As shown in Figure 12, the telescopic assembly 23 includes a first telescopic frame group, a second telescopic frame group, and a third telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about the first center line O.

[0125] The first telescopic frame group includes a first folding telescopic frame 231a, the folding unit 2310 of the first folding telescopic frame 231a is V-shaped and includes a first connecting rod 1a and a second connecting rod 1b, one end of the first connecting rod 1a and one end of the second connecting rod 1b are connected through a first connecting part, and the second connecting rod 1b is connected to one end of the first connecting rod 1a of another folding unit 2310 of the first folding telescopic frame 231a through a second connecting part.

[0126] The first telescopic frame group includes a second folding telescopic frame 231b. The second folding telescopic frame 231b is symmetrically arranged with the first folding telescopic frame 231a about the first center line O.

[0127] The third telescopic frame group includes a third folding telescopic frame 231c, any folding unit 2310 of the third folding telescopic frame 231c is X-shaped and includes a third link 1c and a fourth link 1d, the middle part of the third link 1c and the middle part of the fourth link 1d are hinged, and one end of the third link 1c is hinged to one end of the fourth link 1d of another folding unit 2310 of the third folding telescopic frame 231c.

[0128] The second connecting portion is the translation portion of the first folding and telescopic frame 231a, and the hinge between the middle portion of the third connecting rod 1c and the middle portion of the fourth connecting rod 1d is the translation portion of the third folding and telescopic frame 231c.

[0129] In FIG12 , the telescopic assembly 23 includes two balancing link groups, one balancing link group is located between the first folding telescopic frame 231 a and the third folding telescopic frame 231 c , and the other balancing link group is located between the second folding telescopic frame 231 b and the third folding telescopic frame 231 c .

[0130] Exemplarily, the two balancing link groups include the same number of balancing links 232 , for example, both include four balancing links 232 .

[0131] Referring again to Figure 4 , in the disclosed embodiment, the telescopic mechanism 20 further includes two telescopic rails 24. The two telescopic rails 24 are located on either side of the m folding and telescopic frames 231 in the first direction y, that is, on either side of the telescopic assembly 23. The ends of the telescopic rails 24 are connected to the fixed portion 21 and the movable portion 22, respectively.

[0132] The telescopic slide rail 24 includes multiple guide rails that are slidably connected in sequence. In the disclosed embodiment, the multiple guide rails include a first fixed guide rail 241, a second fixed guide rail 242, and at least one intermediate guide rail 243. The at least one intermediate guide rail 241 is sequentially connected between the first fixed guide rail 242 and the second fixed guide rail 243. The first fixed guide rail 241 is connected to the fixed portion 21, and the second fixed guide rail 242 is connected to the movable portion 22. The disclosed embodiment does not limit the number of intermediate guide rails 243, and can be set according to the size and storage ratio of the display device.

[0133] Figure 13 is a schematic cross-sectional view of the telescopic guide rail provided in an embodiment of the present disclosure. As shown in Figure 13, each guide rail includes a guide rail body 24a, and the guide rail body 24a has a slide groove 24b.

[0134] Figures 14 and 15 are schematic diagrams of the three-dimensional structure of a guide rail provided by an embodiment of the present disclosure at different angles. As shown in Figures 14 and 15, the slide groove 24b extends from one end of the guide rail body 24a to the other end of the guide rail body 24a. In the embodiment of the present disclosure, the slide groove 24b of each guide rail is located on the surface of the guide rail opposite to the telescopic component 23. This is conducive to reducing the size of the telescopic rail in the second direction z, which is perpendicular to the telescopic direction x and the first direction y. In addition, it is conducive to increasing the size of the telescopic rail in the first direction y and improving the supporting strength of the telescopic rail.

[0135] In addition to the guide rail body 24a, the middle guide rail 243 and the second fixed guide rail 242 further include a limiting portion 24c. The limiting portion 24c and the sliding groove 24b are respectively located on opposite sides of the guide rail body 24a.

[0136] Assuming the first and second guide rails are connected, the first guide rail's stopper 24c is located within the second guide rail's chute 24b. Thus, the first guide rail's stopper 24c and the second guide rail's chute 24b cooperate with each other to achieve relative movement of the first and second guide rails in the telescopic direction y, thereby realizing the telescopic function of the sliding guide rail.

[0137] In the disclosed embodiment, the maximum dimension of the first guide rail's stopper 24c in the second direction z is a first dimension L1, and the dimension of the opening of the second guide rail's chute 24b in the second direction z is a second dimension L2, with the first dimension L1 being greater than the second dimension L2. This makes it difficult for the first guide rail's stopper 24c to escape from the second guide rail's chute 24b, thereby improving the reliability of the telescopic rail during extension and retraction.

[0138] Optionally, the cross-sectional shape of the slide groove 24b can be diamond-shaped (as shown in part (a) of FIG. 16 ), teardrop-shaped (as shown in part (b) of FIG. 16 ), or T-shaped (as shown in part (c) of FIG. 16 ).

[0139] Optionally, in some examples, the first side surface of the limiting portion 24c has a slot 24d. The first side surface is the side surface of the limiting portion 24c away from the guide rail body 24a where it is located. The slot 24d extends from one end of the limiting portion to the other end of the limiting portion 24c. The bottom of the chute 24b has a protruding structure 24e. The protruding structure 24e is located at the end of the chute 24b near the first fixed guide rail 241. The protruding structure 24e is located in the slot 24d, allowing the limiting portion 24c to fully open, further preventing the limiting portion from escaping from the chute where it is located. Since the limiting portion has the slot 24d, during the assembly process of the first guide rail and the second guide rail, the limiting portion of the first guide rail is squeezed and its cross-sectional area is reduced, making it easy to enter the chute of the second guide rail. In this way, the assembly efficiency of the sliding guide rail can be improved.

[0140] Exemplarily, the protrusion structure 24e is a convex strip, the length direction of which is consistent with the extension direction of the chute 24b. Optionally, the bottom surface of the convex strip is connected to the bottom of the chute, and the top surface of the convex strip is arc-shaped to facilitate insertion into the slot 24d.

[0141] Optionally, in combination with FIG. 4 and FIG. 17 , the telescopic mechanism 23 further includes a rear shell 25 , and the telescopic assembly 23 and the telescopic slide rail 24 are located in the rear shell 25 .

[0142] The rear housing 25 includes a plurality of sub-housings, including a first stator sub-housing 251, a second stator sub-housing 252, and an intermediate sub-housing 253. The first stator sub-housing 251 is connected to the fixed portion 21, and the second stator sub-housing 252 is connected to the movable portion 22. The intermediate sub-housing 253 is connected between the first stator sub-housing 2511 and the second stator sub-housing 2512.

[0143] The embodiment of the present disclosure does not limit the number of the intermediate sub-housings 2513 , and can be set according to the size and storage ratio of the display device, for example, 1, 2, or 3.

[0144] Figure 18 is a schematic cross-sectional view of the rear housing along line AA in Figure 17, and Figure 19 is an enlarged schematic view of section E in Figure 18. In conjunction with Figures 18 and 19, in the disclosed embodiment, each sub-housing includes a bottom plate 25a and two side plates 25b, each of which is connected to opposite sides of the bottom plate 25a. It should be noted that only one side plate 25b is shown in Figure 19. Thus, the bottom plate 25a and the two side plates 25b of the sub-housing define a storage space for accommodating the telescopic assembly 23 and the telescopic slide rail 24.

[0145] A first guide structure 25e is provided on the inner wall of the first side plate of the first sub-shell, and a second guide structure 25f is provided on the outer wall of the first side plate of the second sub-shell. The inner wall and the outer wall are at least partially opposite to each other, the first guide structure 25e and the second guide structure 25f match, and the first sub-shell and the second sub-shell are two connected sub-shells 251.

[0146] Optionally, the first guide structure 25e is a guide groove, the length direction of the guide groove is consistent with the telescopic direction x; the second guide structure 25f is a guide protrusion, and the guide protrusion is located in the guide groove.

[0147] The bottom surface of the base plate 25a of the second fixed sub-housing 252 has a protrusion 25c, which is the side of the base plate 25a facing away from the flexible display. This protrusion 25c acts as a handle, making it easier for the user to pull open the rear housing, thereby driving the telescopic assembly and telescopic slide rail to extend and retract. The sides of the base plate 25a of each of the multiple sub-housings, except the second fixed sub-housing 252, have a clearance opening 25d that matches the protrusion 25c. When the rear housing is in the retracted state, the protrusion 25c is located in the clearance opening 25d, so as not to affect the telescopic mechanism's telescopic movement.

[0148] The embodiment of the present disclosure does not limit the shape of the protrusion 25c. For example, it can be an arc-shaped block, a semi-cylinder, etc.

[0149] An embodiment of the present disclosure further provides a telescopic mechanism, which includes a fixed portion, a movable portion, and a telescopic assembly. The fixed portion and the movable portion are respectively used to connect to two opposite sides of the flexible display screen.

[0150] The telescopic assembly includes m folding telescopic frames, where m is an integer greater than 1. The two ends of the folding telescopic frames are respectively connected to the fixed portion and the movable portion. The m folding telescopic frames are spaced apart in a first direction, which is perpendicular to the telescopic direction of the telescopic assembly. The folding telescopic frames include a plurality of folding units connected in sequence along the telescopic direction of the telescopic units. The m folding telescopic frames include at least two first folding telescopic frames, wherein the folding units of the first folding telescopic frames are V-shaped and include a first connecting rod and a second connecting rod. One end of the first connecting rod is connected to one end of the second connecting rod by a first connecting portion, and the second connecting rod is connected to one end of the first connecting rod of another folding unit of the first folding telescopic frame by a second connecting portion.

[0151] Under the same telescopic distance and when the length of a single connecting rod is constant, the folding telescopic frame needs to include fewer connecting rods, which is beneficial to reducing the weight of the display device.

[0152] Exemplarily, the m folding telescopic frames are divided into a first telescopic frame group and a second telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about a first center line of the telescopic assembly.

[0153] In a possible embodiment, the first telescopic frame group includes at least two first folding telescopic frames. For related content, please refer to the related content of the embodiment shown in Figures 4 to 6 or Figure 10, and will not be described in detail here.

[0154] In another possible embodiment, the first telescopic frame assembly includes at least one first folding telescopic frame and at least one second folding telescopic frame. For related details, please refer to the relevant contents of the embodiment shown in FIG12 , which will not be described in detail here.

[0155] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A telescopic mechanism, characterized in that: The telescopic mechanism comprises a fixed portion (21), a movable portion (22) and a telescopic assembly (23), wherein the fixed portion (21) and the movable portion (22) are respectively used to be connected to two opposite sides of the flexible display screen (10); The telescopic assembly (23) comprises m folding telescopic frames (231) and m-1 balancing connecting rod groups, wherein m is an integer and m is greater than 1; Two ends of the folding telescopic frame (231) are respectively connected to the fixed portion (21) and the movable portion (22); the m folding telescopic frames (231) are arranged at intervals in a first direction (y), and the first direction (y) is perpendicular to the telescopic direction (x) of the telescopic assembly; Each of the balancing link groups is located between two adjacent folding and telescopic frames (231) among the m folding and telescopic frames (231), and each of the balancing link groups comprises at least one balancing link (232), two ends of each of the balancing links (232) are respectively connected to the two adjacent folding and telescopic frames (231), and a length direction of the balancing link (232) is consistent with the first direction (y).

2. The telescopic mechanism according to claim 1, characterized in that: The folding and telescopic frame (231) comprises a plurality of folding units (2310) connected in sequence along the telescopic direction (x), each of the folding units (2310) having a translation portion, and during the telescopic process of the folding and telescopic frame (231), the distance between the translation portion and a first center line (O) of the telescopic assembly (23) remains unchanged, and the length direction of the first center line (O) is consistent with the telescopic direction (x); The balancing link (232) is connected between a translation portion of a first folding unit and a translation portion of a second folding unit, and the first folding unit and the second folding unit are two folding units (2310) adjacent to each other in the first direction.

3. The telescopic mechanism according to claim 2, characterized in that: The m folding telescopic frames (231) are divided into a first telescopic frame group and a second telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about the first center line (O); The first telescopic frame group comprises a first folding telescopic frame (231a) and a second folding telescopic frame (231b); The folding unit of the first folding telescopic frame (231a) is V-shaped and comprises a first connecting rod (1a) and a second connecting rod (1b), one end of the first connecting rod (1a) and one end of the second connecting rod (1b) are connected via a first connecting portion, and the second connecting rod (1b) and the other end of the first folding telescopic frame (231a) are connected via a first connecting portion. One end of the first connecting rod (1a) of the folding unit (2310) is connected via a second connecting portion; The second folding telescopic frame (231b) comprises a third connecting rod (1c) and a fourth connecting rod (1d), one end of the third connecting rod (1c) and one end of the fourth connecting rod (1d) are connected via a third connecting portion, the third connecting rod (1c) and the first connecting rod (1a) are parallel, and the fourth connecting rod (1d) and the second connecting rod (1b) are parallel, and the fourth connecting rod (1d) and one end of the third connecting rod (1c) of another folding unit (2310) of the second folding telescopic frame are connected via a fourth connecting portion; Wherein, the third connection part is the translation part of the first folding and telescopic frame (231a), and the fourth connection part is the translation part of the second folding and telescopic frame (231b).

4. The telescopic mechanism according to claim 3, characterized in that: The telescopic assembly further comprises at least one co-moving connecting rod (233), wherein the co-moving connecting rod (233) is connected between a first connecting portion of the first folding and telescopic frame (231a) and a second connecting portion of the second folding and telescopic frame (231b).

5. The telescopic mechanism according to claim 3, characterized in that: Any one of the first connecting part, the second connecting part, the third connecting part and the fourth connecting part comprises a first connecting structure (2a), a second connecting structure (2b) and a connecting plate (2c); the first connecting structure and the second connecting structure are respectively fixedly connected to two adjacent connecting rods in the folding telescopic frame (231); the first connecting structure (2a) and the second connecting structure (2b) are respectively hinged to the connecting plate (2c); and the rotation axes of the first connecting structure (2a) and the second connecting structure (2b) relative to the connecting plate (2c) are perpendicular to the telescopic direction (x) and the first direction (y).

6. The telescopic mechanism according to claim 5, characterized in that: In at least one of the first connecting part, the second connecting part, the third connecting part and the fourth connecting part, the first connecting structure (2a) and the second connecting structure (2b) have tooth structures (2d) on their outer side walls respectively, and the tooth structures (2d) of the first connecting structure (2a) and the tooth structures (2d) of the second connecting structure (2b) are meshed with each other.

7. The telescopic mechanism according to claim 2, characterized in that: The m folding telescopic frames (231) are divided into a first telescopic frame group and a second telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about the first center line (O); The first telescopic frame group comprises a first folding telescopic frame (231a), a folding unit (2310) of the first folding telescopic frame (231a) comprises a first connecting rod (1a) and a second connecting rod (1b), a middle portion of the first connecting rod (1a) and a middle portion of the second connecting rod (1b) are hinged, and one end of the first connecting rod (1a) is hinged to one end of the second connecting rod (1b) of another folding unit (2310) of the first folding telescopic frame (231a). catch; Wherein, the hinged portion between the middle portion of the first connecting rod (1a) and the middle portion of the second connecting rod (1b) is the translation portion of the first folding telescopic frame (231a).

8. The telescopic mechanism according to claim 2, characterized in that: The m folding telescopic frames (231) are divided into a first telescopic frame group, a second telescopic frame group and a third telescopic frame group, and the first telescopic frame group and the second telescopic frame group are symmetrically arranged about the first center line (O); The first telescopic frame group comprises a first folding telescopic frame (231a), a folding unit (2310) of the first folding telescopic frame (231a) comprises a first connecting rod (1a) and a second connecting rod (1b), one end of the first connecting rod (1a) and one end of the second connecting rod (1b) are connected via a first connecting portion, and the second connecting rod (1b) and one end of the first connecting rod (1a) of another folding unit (2310) of the first folding telescopic frame (231a) are connected via a second connecting portion; The third telescopic frame group comprises a third folding telescopic frame (231c), any folding unit (2310) of the third folding telescopic frame (231c) comprises a third connecting rod (1c) and a fourth connecting rod (1d), the middle part of the third connecting rod (1c) is hinged to the middle part of the fourth connecting rod (1d), and one end of the third connecting rod (1c) is hinged to one end of the fourth connecting rod (1d) of another folding unit (2310) of the third folding telescopic frame (231c); The second connecting portion is the translation portion of the first folding and telescopic frame (231a), and the hinged portion between the middle portion of the third connecting rod (1c) and the middle portion of the fourth connecting rod (1d) is the translation portion of the third folding and telescopic frame (231c).

9. The telescopic mechanism according to any one of claims 2 to 8, characterized in that: In the telescopic direction (x), for any of the folding and telescopic frames (231), one or more folding units (2310) exist between the first balancing link and the second balancing link, and the first balancing link and the second balancing link are two balancing links (232) adjacent to each other in the telescopic direction (x) in the same balancing link group.

10. The telescopic mechanism according to claim 9, characterized in that: The telescopic assembly (23) further comprises at least one magnet (234), and the middle portion of at least one of the balancing connecting rods (232) is connected to the at least one magnet (234).

11. The telescopic mechanism according to claim 10, characterized in that: The telescopic assembly further comprises a first connecting rod (232a) and a second connecting rod (232b), one end of the first connecting rod (232a) and one end of the second connecting rod (232b) are respectively connected to the middle of the balancing link (232), the first connecting rod (232a) and the second connecting rod (232b) are respectively located on both sides of the balancing link (232) in the telescopic direction (x), and the first connecting rod (232a) and the second connecting rod (232b) are arranged at intervals in the first direction (y); The at least one magnet (234) includes a first magnet and a second magnet, the first connecting rod (232a) is connected to the first magnet, and the second connecting rod (232b) is connected to the second magnet.

12. The telescopic mechanism according to claim 11, characterized in that: The first connecting rod (232a) has a first mounting groove (232c) on a surface close to the flexible display screen, and the first magnet is located in the first mounting groove; A surface of the second connecting rod (232b) close to the flexible display screen has a second mounting groove, and the second magnet is located in the second mounting groove (232d).

13. The telescopic mechanism according to any one of claims 1 to 8 and claims 10 to 12, characterized in that: The telescopic mechanism further comprises two telescopic slide rails (24), wherein the two telescopic slide rails (24) are located on both sides of the telescopic assembly (23) in the first direction (y); The telescopic slide rail (24) comprises a plurality of guide rails, the plurality of guide rails comprising a first fixed guide rail (241), a second fixed guide rail (242) and at least one intermediate guide rail (243), the at least one intermediate guide rail (243) being sequentially connected between the first fixed guide rail (241) and the second fixed guide rail (242), the first fixed guide rail (241) being connected to the fixed portion (21), and the second fixed guide rail (242) being connected to the movable portion (22); The intermediate guide rail (243) and the second fixed guide rail (242) both comprise a guide rail body (24a) and a limiting portion (24c); the guide rail body (24a) is provided with a slide groove (24b); the limiting portion (24b) and the slide groove (24b) are respectively located on opposite sides of the guide rail body (24a); The limiting portion (24c) of the first guide rail is located in the sliding groove (24b) of the second guide rail, and the first guide rail and the second guide rail are two connected guide rails among the multiple guide rails.

14. The telescopic mechanism according to claim 13, characterized in that: The maximum dimension of the limiting portion (24c) of the first guide rail in the second direction (z) is a first dimension (L1), the dimension of the opening of the sliding groove (24b) of the second guide rail in the second direction (z) is a second dimension (L2), and the first dimension (L1) is greater than the second dimension (L2); The second direction (z) is perpendicular to the telescopic direction (x) and the first direction (y).

15. The telescopic mechanism according to claim 14, characterized in that: The first side surface of the limiting portion (24c) has a slot (24d), the first side surface is the side surface of the limiting portion (24c) away from the guide rail body (24a) where it is located, and the slot (24d) extends from one end of the limiting portion (24c) to the other end of the limiting portion (24c); The bottom of the slide groove (24b) has a protruding structure (24e), and the protruding structure (24e) is located in the clamping groove (24d) and at one end of the slide groove (24b) close to the first fixed guide rail (251).

16. The telescopic mechanism according to any one of claims 1 to 8, claims 10 to 12, and claims 14 to 15, characterized in that: The telescopic mechanism further comprises a rear shell (25), and the telescopic assembly (23) is located in the rear shell (25); The rear housing (25) comprises a plurality of sub-housings, each of which comprises a bottom plate (25a) and two side plates (25b), wherein the two side plates (25b) are respectively connected to opposite sides of the bottom plate (25a); The multiple sub-shells include a first fixed sub-shell (251), a second fixed sub-shell (252) and at least one intermediate sub-shell (253); the first fixed sub-shell (251) is connected to the fixed portion (21); the second fixed sub-shell (252) is connected to the movable portion (22); and the at least one intermediate sub-shell (253) is sequentially connected between the first fixed sub-shell (251) and the second fixed sub-shell (252).

17. The telescopic mechanism according to claim 16, characterized in that: A first guide structure (25e) is provided on the inner wall of the first side plate of the first sub-shell, and a second guide structure (25f) is provided on the outer wall of the first side plate of the second sub-shell. The inner wall and the outer wall are at least partially opposite to each other, the first guide structure (25e) and the second guide structure (25f) match each other, and the first sub-shell and the second sub-shell are two connected sub-shells among the multiple sub-shells.

18. The telescopic mechanism according to claim 17, characterized in that: The first guiding structure (25e) is a guiding groove, the length direction of which is consistent with the telescopic direction (x); the second guiding structure (25f) is a guiding protrusion, and the guiding protrusion is located in the guiding groove.

19. The telescopic mechanism according to claim 17 or 18, characterized in that: The bottom surface of the bottom plate (25a) of the second fixed sub-shell (252) has a convex block (25c), and the bottom surface is a side of the bottom plate (25a) of the second fixed sub-shell (252) away from the flexible display panel (10); The side edge of the bottom plate (25a) of the first stator housing (251) and the side edge of the bottom plate (25a) of the at least one intermediate housing (253) both have an avoidance opening (25d) matching the protrusion (25c).

20. A display device, characterized in that: The display device comprises a flexible display screen and the telescopic mechanism according to any one of claims 1 to 19, and the flexible display screen is connected to the telescopic mechanism.