CN114694491A

CN114694491A - Expandable display device and electronic equipment

Info

Publication number: CN114694491A
Application number: CN202011610709.5A
Authority: CN
Inventors: 王战姝
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-01

Abstract

An expandable display device and electronic equipment, the expandable display device comprises a fixed cover, a sliding cover, a plurality of supporting strips, a supporting strip and a flexible display piece, wherein the fixed cover comprises an accommodating cavity, the sliding cover is in sliding connection with the fixed cover, at least part of the sliding cover is accommodated in the accommodating cavity, the plurality of supporting strips are arranged side by side and are all in sliding connection with the sliding cover, the plurality of supporting strips jointly form a supporting surface, the supporting strip is arranged on the supporting surface, the flexible display piece comprises a first part and a second part which are connected, the first part is correspondingly arranged on the fixed cover, and the second part is arranged on the surface of the supporting strip, which deviates from the plurality of supporting strips; when the expandable display device is switched between the contraction state and the expansion state, the sliding cover and the fixed cover slide relatively to drive the second part of the flexible display piece to fold or unfold so as to reduce or increase the display area of the expandable display device. Through the arrangement, the second portion cannot be arched by the supporting bar, concave-convex feeling cannot be generated by pressing, and use experience of a user is promoted.

Description

Expandable display device and electronic equipment

Technical Field

The invention belongs to the technical field of display, and particularly relates to an expandable display device and electronic equipment with the expandable display device.

Background

With the improvement of life quality, people no longer meet the requirements of electronic equipment such as mobile phones, tablet computers, personal digital assistants and the like which can only reduce and enlarge a conventional display area, and therefore the folding screen technology and the stretching screen technology are paid more and more attention. The stretching screen can change the size of the display area more freely than the folding screen, and thus the stretching screen is more preferred by consumers.

However, the stretching screen in the prior art is unreasonable in structural design, so that the flexible screen is easily arched after stretching or retracting, concave-convex feeling is generated when pressing, and the use experience of a user is poor.

Disclosure of Invention

The invention aims to provide an expandable display device and electronic equipment, which can avoid the problems of arching of a flexible display piece and concave-convex feeling generated during pressing, so that the use experience of a user is improved.

In order to realize the purpose of the invention, the invention provides the following technical scheme:

in a first aspect, the invention provides an expandable display device, which includes a fixed cover, a sliding cover, a plurality of support bars, a support sheet and a flexible display piece, wherein the fixed cover includes an accommodating cavity, the sliding cover is slidably connected with the fixed cover and at least partially accommodated in the accommodating cavity, the plurality of support bars are arranged side by side and are all slidably connected with the sliding cover, the plurality of support bars form a support surface together, the support sheet is arranged on the support surface, the flexible display piece includes a first part and a second part which are connected, the first part is correspondingly arranged on the fixed cover, and the second part is arranged on the surface of the support sheet deviating from the plurality of support bars; when the expandable display device is switched between the contraction state and the expansion state, the sliding cover and the fixed cover slide relatively to drive the second part of the flexible display piece to fold or unfold, so that the display area of the expandable display device is reduced or enlarged.

Through setting up a plurality of support bars and backing sheet, on the holding surface that a plurality of support bars formed was located to the backing sheet, set up the second portion of flexible display piece on the surface that the backing sheet deviates from a plurality of support bars for the second portion can not be arched by the support bar, and because the second portion hugs closely on the backing sheet, presses and can not produce the sense of relief, is favorable to promoting user's use and experiences.

In a second aspect, the present invention provides an electronic device, which includes the expandable display device described in any one of the embodiments of the first aspect. By adding the expandable display device provided by the invention into the electronic equipment, the electronic equipment cannot generate concave-convex feeling when pressed, and the flexible display piece cannot be arched, so that the expandable display device has better use experience.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1a is an exploded schematic view of an expandable display device in a contracted state according to an embodiment of the present invention;

fig. 1b is an exploded schematic view of an expandable display device in an expanded state according to an embodiment of the present invention;

fig. 2a is a schematic perspective view of an expandable display device in a retracted state according to an embodiment of the present invention;

fig. 2b is a schematic perspective view of an expandable display device in an expanded state according to an embodiment of the present invention;

fig. 3a is a schematic top view of an expandable display device in a contracted state according to an embodiment of the present invention;

fig. 3b is a schematic top view of an expandable display device in an expanded state according to an embodiment of the present invention;

fig. 4a is a schematic partial structural view of an expandable display device in a contracted state according to an embodiment of the present invention;

fig. 4b is a schematic partial structural diagram of an expandable display device in an expanded state according to an embodiment of the present invention;

fig. 5a is a schematic partial structural view of an expandable display device in a contracted state according to an embodiment of the present invention;

fig. 5b is a schematic partial structural diagram of an expandable display device in an expanded state according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a sliding cover and a part of components mounted on the sliding cover according to an embodiment of the present invention;

FIG. 7 is a schematic top view of the sliding cover and some components mounted on the sliding cover of FIG. 6;

FIG. 8 is a schematic cross-sectional view of the sliding cover and a part of the components mounted on the sliding cover of FIG. 7 along the B-B direction;

FIG. 9a is a schematic cross-sectional view of the expandable display device in the A-A direction of FIG. 3 a;

FIG. 9b is a schematic cross-sectional view of the expandable display device of FIG. 3b along the A-A direction;

FIG. 10a is an enlarged schematic structural view of the expandable display device of FIG. 9 a;

FIG. 10b is an enlarged schematic view of the expandable display device of FIG. 9 b;

FIG. 11 is a perspective view of the support bar of FIG. 1 a;

FIG. 12 is a front view of the brace bar of FIG. 11;

FIG. 13 is an exploded view of a portion of the expandable display device in an expanded state according to the present invention;

FIG. 14 is an exploded view of the expandable display device of FIG. 13 from another perspective;

FIG. 15 is a schematic perspective view of the first and second sliders of FIG. 1 a;

fig. 16 is a simple structural view of a part of the expandable display device of fig. 1 a.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1a and fig. 1b, an embodiment of the invention provides an expandable display device 1000, and the expandable display device 1000 may be an electronic device having a display function. The expandable display device 1000 includes a sliding cover 10, a fixed cover 20, a plurality of support bars 30, a support bar 40, and a flexible display 50. The fixed cover 20 includes a receiving cavity 101, and the sliding cover 10 is slidably connected to the fixed cover 20 and at least partially received in the receiving cavity 101. The plurality of support bars 30 are arranged side by side and are all slidably connected with the sliding cover 10. The support strips 30 together form a support surface 301, and the support sheet 40 is disposed on the support surface 301. The flexible display 50 includes a first portion 51 and a second portion 52 connected to each other, the first portion 51 is correspondingly disposed on the fixed cover 20, and the second portion 52 is disposed on a surface of the supporting sheet 40 facing away from the plurality of supporting sheets 30.

Referring to fig. 2a to fig. 3b, when the expandable display device 1000 is switched between the retracted state and the expanded state, the sliding cover 10 and the fixed cover 20 slide relatively to drive the second portion 52 of the flexible display element 50 to fold or unfold, so as to reduce or increase the display area of the expandable display device 1000.

Regarding the fixed cover 20 and the sliding cover 10, for the convenience of assembly, the fixed cover 20 includes a detachable upper cover 21 and a detachable lower cover 22, wherein the inner wall of the lower cover 22 is provided with a long strip protrusion 221, a long strip groove 102 is opened at the periphery of the sliding cover 10, and the long strip protrusion 221 extends into the long strip groove 102 so that the lower cover 22 and the sliding cover 10 are slidably connected. In other embodiments, the positions of the elongated grooves 102 and the elongated protrusions 221 are interchangeable, i.e., the elongated grooves 102 are provided on the lower cover 22 and the elongated protrusions 221 are provided on the slide cover 10.

Regarding the supporting strips 30 and the supporting pieces 40, the supporting surface 301 formed by the supporting strips 30 is a curved surface or an approximate curved surface composed of a plane and a curved surface, the supporting pieces 40 are arranged on the supporting surface 301, and the shape of the supporting surface 301 changes along with the switching process between the contraction state and the expansion state. In this embodiment, a portion of the supporting sheet 40 is fixed on the surface of the upper cover 21 facing away from the lower cover 22, the first portion 51 of the flexible display element 50 is connected to the surface of the supporting sheet 40 facing away from the upper cover 21, and another portion of the supporting sheet 40 is connected to the second portion 52 of the flexible display element 50. In other embodiments, the support sheet 40 may be connected only to the second portion 52 of the flexible display 50, and the first portion 51 of the flexible display 50 is directly attached to the surface of the upper cover 21 facing away from the lower cover 22. Alternatively, with respect to the first and

second portions

51, 52 of the flexible display 50, the first portion 51 is always in the display area, whether in the contracted or expanded state. The second portion 52 of the flexible display 50 is located in the display area only in the expanded state for displaying images, and the second portion 52 is accommodated in the accommodating cavity 101 and not used for displaying images in the contracted state. In other embodiments, at least a portion of the second portion 52 (e.g., the area where the bend region is exposed) may be displayed in the collapsed state. In this embodiment, the first portion 51 and the second portion 52 are an integrated flexible screen, and in other embodiments, the first portion 51 may be a rigid screen, and the second portion 52 may be a flexible screen spliced with the first portion 51.

In this embodiment, referring to fig. 1a, fig. 1b, fig. 4a and fig. 4b, the second portion 52 and the supporting sheet 40 and the plurality of supporting bars 30 corresponding to the second portion 52 are in a movable state, when the fixed cover 20 and the sliding cover 10 slide relatively away from each other, the supporting sheet 40 drives the plurality of supporting bars 30 to move from the accommodating cavity 101 to the display surface 1001, so that the second portion 52 reaches the display area, and the display area is increased. When the fixed cover 20 and the sliding cover 10 slide relatively close to each other, the supporting surface 301 drives the plurality of supporting bars 30 to move away from the display surface 1001 and enter the accommodating cavity 101, so that the second portion 52 leaves the display area and is accommodated in the accommodating cavity 101, and the display area is reduced.

According to the expandable display device 1000 provided by the invention, the plurality of support bars 30 and the support sheet 40 are arranged, the support sheet 40 is arranged on the support surface 301 formed by the plurality of support bars 30, the second part 52 of the flexible display piece 50 is arranged on the surface of the support sheet 40 deviating from the plurality of support bars 30, so that no break difference occurs at the connection part of the drawing structure of the flexible display piece 50, the second part 52 cannot be arched by the support bars 30 due to the existence of the support sheet 40, and meanwhile, concave-convex feeling cannot be generated due to pressing because the second part 52 is clung to the support sheet 40, and the use experience of a user is favorably improved.

In one embodiment, referring to fig. 1a, fig. 5b and fig. 6, the expandable display device 1000 includes a display surface 1001 and a back surface 1002 opposite to the display surface 1001. The slide cover 10 includes a track portion 11, and the track portion 11 extends from the display surface 1001 side of the expandable display device 1000 to the back surface 1002 side of the expandable display device 1000. The plurality of supporting bars 30 are clamped on the track portion 11 and are connected with the track portion 11 in a sliding manner in the extending direction of the track portion 11. Specifically, the track portion 11 may be a slide rail, a slide groove, or the like. By providing the track portion 11 extending from one side of the display surface 1001 to one side of the back 1002 on the sliding cover 10, the supporting bar 30 is clamped to the track portion 11 and is slidably connected to the track portion 11 in the extending direction of the track portion 11, so that the supporting bar 40 moves along the extending direction of the track portion 11 when the sliding cover 10 and the fixed cover 20 move relatively, which is beneficial to the second portion 52 of the flexible display 50 being folded or unfolded smoothly.

In one embodiment, referring to fig. 7 and 8, the track portion 11 includes a first sliding slot 111, an arc-shaped slot 112 and a second sliding slot 113 connected in sequence. The first chute 111 is located on a side close to the display surface 1001. The second sliding slot 113 is located at a side close to the back 1002, and one end of the second sliding slot 113 far away from the arc-shaped slot 112 is adjacent to the fixed cover 20. Specifically, the first sliding groove 111 and the second sliding groove 113 are connected with the arc-shaped groove 112 in a smooth transition manner, so that the support bar 30 can be ensured to move stably when leaving and entering the arc-shaped groove 112. By arranging the first sliding slot 111, the arc-shaped slot 112 and the second sliding slot 113 which are connected in sequence, when the fixed cover 20 and the sliding cover 10 slide relatively, the second portion 52 of the flexible display 50 can be stably folded or unfolded, which is beneficial to avoiding the second portion 52 from arching.

In one embodiment, with continued reference to fig. 7 and 8, the first chute 111 and the second chute 113 are disposed in parallel. The first sliding groove 111 and the second sliding groove 113 are parallel to each other, so that the second portion 52 can be better accommodated, and the smoothness of the movement of the second portion 52 and the supporting plate 40 can be improved.

In one embodiment, a plurality of support bars 30 are slidable relative to each other, i.e., the distance between adjacent support bars 30 can vary during the sliding movement. In particular, adjacent support bars 30 are not interconnected. In other embodiments, adjacent support bars 30 may be connected by a spacing structure for limiting the distance between adjacent support bars 30, it being understood that the spacing structure may be used to limit the minimum distance and/or the maximum distance between adjacent support bars 30.

In one embodiment, referring to fig. 9a to 10b, the distance D1 between adjacent supporting bars 30 when the supporting bars 30 slide in the first sliding slot 111 or the second sliding slot 113 is greater than the distance D2 between adjacent supporting bars 30 when the supporting bars 30 slide in the arc-shaped slots 112. It can be understood that, the bending radii of the plurality of supporting bars 30 and the bending radii of the supporting pieces 40 in the first sliding groove 111 or the second sliding groove 113 are equal and infinite, and both can move synchronously, and in the arc-shaped groove 112, the bending radii of the plurality of supporting bars 30 are smaller than the bending radii of the supporting pieces 40, and move at the same angle, the arc length of the movement of the supporting pieces 40 is larger than the arc length of the movement of the supporting pieces 40, if the supporting bars 30 cannot slide relatively, the total length of the plurality of supporting bars 30 after being separated from or entering the arc-shaped groove 112 will change, which may cause a situation of arching or unsmooth sliding. By arranging the supporting bars 30 to slide relatively, the distance D1 between the adjacent supporting bars 30 is greater than the distance D2 between the adjacent supporting bars 30 when the plurality of supporting bars 30 move in the first sliding groove 111 or the second sliding groove 113, so as to compensate the moving arc length difference between the supporting bars 30 and the supporting bars 40 after the supporting bars 30 are separated from or enter the arc-shaped groove 112, and avoid the arching of the second part 52.

In one embodiment, referring to fig. 11 and 12, support bar 30 includes opposing first and

second surfaces

31 and 32. The first surface 31 is a curved surface. First surface 31 through setting up support strip 30 is the cambered surface to in a plurality of support strips 30 can laminate the lateral wall 1121 of arc wall 112 smoothly and remove, be favorable to making the steady removal of support strip 40 and second portion 52, and be favorable to a plurality of support strips 30 to form a cambered surface in arc wall 112 and support.

Optionally, first surface 31 of support bar 30 is connected to support bar 40. In another embodiment, only the first support bar 310 closest to the first portion 51 of the flexible display 50 may be connected to the support sheet 40.

In one embodiment, referring to fig. 8 and 12, the arc-shaped groove 112 includes a side wall 1121 connected to the first surface 31, the side wall 1121 is an arc surface, and a center of the first surface 31 of the supporting bar 30 in the arc-shaped groove 112 coincides with a center of the side wall 1121. The center of the circle of the first surface 31 of the supporting strips 30 in the arc-shaped groove 112 coincides with the center of the circle of the side wall 1121, so that when the plurality of supporting strips 30 can move smoothly, the second portion 52 is well attached to the supporting strips 40, the concave-convex feeling generated during pressing is avoided, and the supporting strips 40 are convenient to connect with the plurality of supporting strips 30 simultaneously. It will be appreciated that when the center of the first surface 31 of the support bar 30 in the arc-shaped slot 112 is not coincident with the center of the side wall 1121, the following two situations are likely to occur.

The first condition is as follows: although the plurality of supporting bars 30 can move in the arc-shaped groove 112, the radius of curvature of the first surface 31 is too small, so that when the supporting bars 30 are attached to the supporting sheet 40, a large gap is formed between the supporting bars and the supporting sheet, and a concave-convex feeling is easily generated when the supporting bars are pressed.

Case two: the first surface 31 has a larger curvature radius, when the supporting bar 30 is attached to the supporting plate 40, the gap between the supporting bar 30 and the supporting plate 40 is smaller, but the too large curvature radius easily causes the supporting bar 30 not to pass through the arc-shaped groove 112, or the supporting bar 30 is stuck when the arc-shaped groove 112 moves, which is not favorable for the stable movement of the supporting plate 40 and the second portion 52.

In one embodiment, referring to fig. 1b and fig. 11, the first surface 31 is opened with a connecting groove 311, and the connecting groove 311 is filled with an adhesive (not shown) for connecting the supporting bar 30 and the supporting sheet 40. Specifically, the connecting slot 311 is long, and the adhesive is preferably viscose. Through seting up the connecting groove 311 at first surface 31, through pack the bonding thing in connecting groove 311, through bonding thing connection support strip 30 and backing sheet 40, all fix each support strip 30 on backing sheet 40, when fixed lid 20 and sliding closure 10 relative slip, backing sheet 40 can drive the extending direction removal of a plurality of support strips 30 along orbit portion 11, moreover, because the first surface 31 of support strip 30 being connected with backing sheet 40 is the cambered surface, can make the distance between two adjacent support strips 30 changeable, even remove in arc groove 112 and can not produce and slide.

Optionally, the adhesive has certain elasticity, and the supporting strip 30 and the supporting strip 40 can have certain relative movement.

Alternatively, the connection slots 311 may be only disposed at two opposite ends of the first surface 31 of the supporting bar 30, so as to reduce the connection area between the supporting bar 30 and the supporting plate 40, so as to facilitate the movement of the supporting bar 30 relative to the supporting plate 40.

In one embodiment, referring to fig. 13 and 14, the expandable display device 1000 further includes a driving assembly 60. The drive assembly 60 includes, among other things, a drive member 61 and a mating member 62. The driving member 61 is disposed on the fixed cover 20 and the mating member 62 is disposed on the sliding cover 10, or the driving member 61 is disposed on the sliding cover 10 and the mating member 62 is disposed on the fixed cover 20. The driving member 61 is used for driving the engaging member 62 to move, so that the engaging member 62 drives the sliding cover 10 to move relative to the fixed cover 20. Specifically, in the present embodiment, the driving element 61 is disposed on the fixing cover 20, and the mating element 62 is disposed on the sliding cover 10, but in other embodiments, the driving element 61 may be disposed on the sliding cover 10, and the mating element 62 is disposed on the fixing cover 20. The driving member 61 can be a motor, a hydraulic machine, a structure adopting electromagnetic driving, and the like. The engaging member 62 may be a rack, lead screw, gear, or the like. By providing the driving member 61 and the engaging member 62, the driving member 61 drives the engaging member 62 to move the sliding cover 10 relative to the fixed cover 20, which facilitates the smooth unfolding or folding of the second portion 52.

In one embodiment, with continued reference to fig. 13 and 14, the driving assembly 60 further includes a first gear 63 and a second gear 64 engaged with each other, the engaging element 62 is a lead screw, and the second gear 64 is engaged with the engaging element 62. The driving member 61 is used for driving the first gear 63 to rotate the second gear 64, so that the second gear 64 moves relative to the mating member 62. Specifically, a first gear 63 is mounted on an output shaft of the driver 61 and is driven to rotate by the driver 61, and a second gear 64 is mounted on and meshed with a lead screw. The fixed cover 20 (the upper cover 21) is provided with a receiving groove 211, the driving member 61, the first gear 63 and the second gear 64 are all disposed in the receiving groove 211, and the driving member 61, the first gear 63 and the second gear 64 are restricted by the receiving groove 211 and cannot move relative to the fixed cover 20. The screw rod is fixed on the sliding cover 10, and the second gear 64 is sleeved on the periphery of the screw rod and is in threaded connection with the screw rod. The driving member 61 drives the first gear 63 to rotate, and the first gear 63 drives the second gear 64 to rotate, so that the second gear 64 moves relative to the lead screw, thereby achieving the purpose of relative sliding between the sliding cover 10 and the fixed cover 20. Since the second gear 64 cannot move relative to the fixed cover 20, this causes the lead screw to move relative to the fixed cover 20, i.e., the slide cover 10 moves relative to the fixed cover 20. By providing the first gear 63 and the second gear 64 and the fitting member 62 as a lead screw, the size of the transmission part is small, and self-locking is achieved by the characteristic of gear engagement without the need for additional mechanism for assisting locking, and the relative positions of the slide cover 10 and the fixed cover 20 are not changed even when external force is applied, thereby preventing the second portion 52 from being arched due to extrusion.

In one embodiment, referring to fig. 1a, the expandable display device 1000 includes a slider assembly 70 slidably connected to the sliding cover 10. The slider assembly 70 is attached to the marginal support bars 320. The support sheet 40 includes a first end 41 proximate the display surface 1001 and a second end 42 distal from the display surface 1001. The first end 41 is fixed relative to the first portion 51 of the flexible display 50. The second end 42 and the end of the second portion 52 of the flexible display 50 remote from the first portion 51 are both connected to a slider assembly 70. Through the arrangement, the support sheet 40 and the second portion 52 of the flexible display 50 can move relative to the sliding cover 10, which is beneficial to improving the folding and unfolding stability of the flexible display 50.

In one embodiment, referring to fig. 1a, 10b and 15, the slider assembly 70 further includes a first slider 71 and a second slider 72, and the first slider 71 and the second slider 72 can slide relatively. The first slider 71 is located on the side of the second slider 72 facing away from the supporting bar 30, and the second slider 72 is connected with the supporting bar 320 on the edge. The second end 42 of the support sheet 40 is connected to the second slider 72 and the second portion 52 of the flexible display 50 is connected to the first slider.

Specifically, the first slider 71 is provided with a plurality of guide grooves 711, the second slider 72 is provided with a plurality of corresponding guide protrusions 721, and the guide protrusions 721 extend into the guide grooves 711 so that the first slider 71 and the second slider 72 can slide relatively. At least one side of the guide protrusion 721 has a stepped structure 7211 in the length direction 701 of the second slider 72, so that the second slider 72 can be prevented from being separated from the first slider 71 in the direction of the lower cover 22 toward the upper cover 21 after the guide protrusion 721 is inserted into the guide groove 711. In other embodiments, the positions of the guide groove 711 and the guide protrusion 721 may be interchanged. It will be appreciated that, as in the case of the plurality of support bars 30 and support plates 40, the bend radius of support plate 40 is smaller than the bend radius of second portion 52, and slippage between support plate 40 and second portion 52 occurs, so that second portion 52 is easily arched. By arranging the second slider 72 and the first slider 71, the first slider 71 and the second slider 72 are connected in a sliding manner, so that the distance between the first slider 71 and the second slider 72 is variable, thereby offsetting the sliding distance between the second portion 52 connected to the first slider 71 and the supporting piece 40 connected to the first slider 71 and being beneficial to avoiding the arching of the second portion 52.

In other embodiments, when the support sheet 40 is thin and the sliding movement between the support sheet 40 and the second portion 52 of the flexible display 50 is small, which may not cause arching, the slider assembly 70 may be configured as an integral structure, that is, the first slider 71 and the second slider 72 are fixed relatively, and may also be understood as only one slider.

In one embodiment, referring to fig. 16, the expandable display device 1000 further includes a first elastic member 73. One end of the first elastic member 73 is connected to the second slider 72, and the other end is connected to the marginal support bar 320. Specifically, the first elastic member 73 is in a compressed state. By providing the compressed first elastic member 73 between the second slider 72 and the marginal support bar 320, the compressed elastic member can tighten the support sheet 40 to prevent the support sheet 40 from being squeezed to arch the second portion 52.

Specifically, one end of the second portion 52 of the flexible display 50 is bonded to the support sheet 40, and the other end is bonded to the first slider 71. The side of the support piece 40 opposite to the second portion 52 is bonded to the plurality of support bars 30, and one end of the support piece close to the first slider 71 is bonded to the second slider 72.

In one embodiment, with continued reference to fig. 16, the expandable display device 1000 further includes a tightening structure 80 installed on the sliding cover 10. A tightening structure 80 is connected to the first slider 71, the tightening structure 80 being adapted to apply an elastic pulling force to the first slider 71 so as to cause the first slider 71 to tighten the second portion 52. This is provided so that the second portion 52 is tightened against the support sheet 40 to improve the flatness of the second portion 52.

In one embodiment, referring to fig. 5a and 5b, the tightening structure 80 includes a second elastic member 81, a fixed pulley 82, a guide rail 83 and a pull rope 84. The guide rail 83, the fixed pulley 82 and the second elastic member 81 are all disposed on a side of the second slider 72 facing away from the first slider 71. The fixed pulley 82 is sleeved on the guide rail 83 and is connected with the guide rail 83 in a sliding way. One end of the pull cord 84 is fixed to the slide cover 10, and the other end thereof is connected to the first slider 71 while passing around the fixed pulley 82. The second elastic member 81 has one end connected to the fixed cover 20 and the other end connected to the fixed pulley 82 so that when the first slider 71 moves away from the guide rail 83, the pull rope 84 compresses the second elastic member 81 via the fixed pulley 82 to increase the tensile force applied to the first slider 71. With such an arrangement, the second portion 52 is tightened by the second elastic member 81 and the pull rope 84, when the expandable display device 1000 is in a contracted state, the second portion 52 is accommodated in the accommodating cavity 101 and is not used, and the second elastic member 81 is not compressed or is compressed to a smaller extent, so that the pull rope 84 applies a smaller pulling force to the second portion 52 through the first slider 71, and the second portion 52 is prevented from being pulled due to a larger pulling force for a long time; when the expandable display device 1000 is in an expanded state, the second portion 52 is expanded and flush with the first portion 51, so as to jointly display, the compression degree of the second elastic member 81 is large, the pulling force applied to the second portion 52 by the pulling rope 84 through the first sliding block 71 is large, the second portion 52 can be ensured to be sufficiently tightened, the phenomenon that the hand feeling is poor due to the fact that the indentation occurs when the pressing is avoided, and the use experience of a user is improved. In addition, the matching mode of the fixed pulley 82 and the guide rail 83 is adopted, so that the space can be saved on one hand, and on the other hand, the fixed pulley 82 is in sliding connection with the guide rail 83, so that the deformation stability of the second elastic part 81 can be ensured.

In one embodiment, referring to fig. 5a and 5b, the extending direction of the guide rail 83 is the same as the elastic deformation direction of the second elastic element 81, and both are parallel to the extending direction of the supporting bar 30. With such an arrangement, the space in the accommodating cavity 101 can be fully utilized, and the over-size of the expandable display device 1000 is avoided.

In one embodiment, with continued reference to fig. 5a and 5b, the tightening structure 80 further includes a guide block 85 disposed on the sliding cover 10, the guide block 85 is disposed on a side of the elastic member facing away from the fixed pulley 82, a guide slot 711 is disposed on the guide block 85, and the pull rope 84 is partially received in the guide slot 711. By providing the guide block 85, the guide block 85 is provided with a guide groove 711 hole, and the pull cord 84 is restrained so as to facilitate the "turning" of the pull cord 84.

Referring to fig. 1a, an embodiment of the present invention further provides an electronic device, where the electronic device may be a smart phone, a tablet computer, a personal digital assistant, a smart watch, a navigator, and the like. The electronic device comprises the expandable display device 1000 provided by the invention. By adding the expandable display device 1000 provided by the invention into the electronic equipment, the pressing of the electronic equipment cannot generate concave-convex feeling, and the flexible display piece 50 cannot be arched, so that the expandable display device has better use experience.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The expandable display device is characterized by comprising a sliding cover, a fixed cover, a plurality of supporting strips, a supporting piece and a flexible display piece, wherein the fixed cover comprises an accommodating cavity, the sliding cover is in sliding connection with the fixed cover, at least part of the sliding cover is accommodated in the accommodating cavity, the supporting strips are arranged side by side and are in sliding connection with the sliding cover, the supporting strips jointly form a supporting surface, the supporting piece is arranged on the supporting surface, the flexible display piece comprises a first part and a second part which are connected, the first part is correspondingly arranged on the fixed cover, and the second part is arranged on the surface, deviating from the supporting strips, of the supporting piece;

when the expandable display device is switched between the contraction state and the expansion state, the sliding cover and the fixed cover slide relatively to drive the second part of the flexible display piece to fold or unfold, so that the display area of the expandable display device is reduced or enlarged.

2. The expandable display device according to claim 1, wherein the expandable display device includes a display surface and a back surface opposite to the display surface, the slide cover includes a track portion extending from a side of the display surface of the expandable display device to a side of the back surface of the expandable display device, and the plurality of support bars are engaged with the track portion and slidably connected to the track portion in an extending direction of the track portion.

3. The expandable display device according to claim 2, wherein the track portion comprises a first sliding slot, an arc-shaped slot and a second sliding slot connected in sequence, the first sliding slot is located at a side close to the display surface, the second sliding slot is located at a side close to the back surface, and one end of the second sliding slot, which is far away from the arc-shaped slot, is adjacent to the fixed cover.

4. The expandable display device according to claim 3, wherein the distance between adjacent support bars when the plurality of support bars slide in the first or second sliding grooves is greater than the distance between adjacent support bars when the plurality of support bars slide in the arc-shaped grooves.

5. An expandable display device as claimed in claim 3 wherein the support strip includes first and second opposed surfaces, the first surface being curved and being connected to the support strip.

6. The expandable display device according to claim 5, wherein the arc-shaped groove comprises a side wall opposite to the first surface, the side wall is an arc surface, and the center of the first surface of the supporting bar in the arc-shaped groove coincides with the center of the side wall.

7. The expandable display device according to claim 5, wherein the first surface is provided with a connecting groove, and the connecting groove is filled with an adhesive for connecting the supporting bar and the supporting sheet.

8. An expandable display device as claimed in claim 3, characterised in that the first and second chutes are arranged in parallel.

9. The expandable display device according to claim 1, further comprising a driving member and a mating member, wherein the driving member is disposed on the fixed cover, and the mating member is disposed on the sliding cover, or the driving member is disposed on the sliding cover, and the mating member is disposed on the fixed cover;

the driving piece is used for driving the matching piece to move, so that the matching piece drives the sliding cover to move relative to the fixed cover.

10. An expandable display device as claimed in claim 9, further comprising a first gear and a second gear engaged with each other, wherein the mating member is a lead screw, the second gear is connected with the mating member in a mating manner, and the driving member is used for driving the first gear to rotate the second gear so as to move the second gear relative to the mating member.

11. The expandable display device according to claim 1, further comprising a slider assembly connected to the supporting bar at the edge, wherein the supporting bar comprises a first end close to the display surface and a second end far from the display surface, the first end is fixed opposite to the first portion of the flexible display member, and the second end and the end of the second portion far from the first portion are connected to the slider assembly.

12. The expandable display device of claim 11, wherein the plurality of support bars includes a first support bar proximate the first portion of the flexible display member, the support bar being fixedly attached to the first support bar.

13. The expandable display device according to claim 11, wherein the sliding block assembly comprises a first sliding block and a second sliding block which are connected in a sliding manner, the first sliding block is positioned on the side of the second sliding block, which faces away from the supporting bar, the second end of the supporting bar is connected with the second sliding block, and the second part of the flexible display member is connected with the first sliding block.

14. An expandable display device as claimed in claim 13, further comprising a first resilient member, one end of which is connected to the second slider and the other end is connected to the edge support bar.

15. An expandable display device as claimed in claim 13, further comprising a tightening structure mounted on the sliding cover, the tightening structure being connected to the first slider, the tightening structure being configured to apply a resilient tension to the first slider to cause the first slider to tighten the second portion.

16. The expandable display device according to claim 15, wherein the tightening structure comprises a second elastic member, a fixed pulley, a guide rail and a pulling rope, the guide rail, the fixed pulley and the second elastic member are all disposed on a side of the second slider opposite to the first slider, the fixed pulley is sleeved on the guide rail and slidably connected with the guide rail, one end of the pulling rope is fixed on the sliding cover, the other end of the pulling rope passes around the fixed pulley and is connected with the first slider, one end of the second elastic member is connected with the fixed pulley, and the other end of the second elastic member is connected with the fixed cover, so that when the first slider moves away from the guide rail, the pulling rope compresses the second elastic member through the fixed pulley to increase the pulling force applied to the first slider.

17. The expandable display device according to claim 16, wherein the extending direction of the guide rail is the same as the elastic deformation direction of the second elastic member, and is parallel to the extending direction of the supporting strip.

18. The expandable display device of claim 16, wherein the tightening structure further comprises a guide block disposed on the sliding cover, the guide block being located on a side of the elastic member facing away from the fixed pulley, the guide block being provided with a guide slot into which the pull cord portion is received.

19. An electronic device, characterized in that it comprises an expandable display device according to any one of claims 1 to 18.