CN114333604A

CN114333604A - Foldable display device

Info

Publication number: CN114333604A
Application number: CN202210158280.3A
Authority: CN
Inventors: 黎胜明; 杜昊
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-04-12
Anticipated expiration: 2042-02-21
Also published as: CN114333604B

Abstract

The invention discloses a foldable display device, and belongs to the technical field of screens. According to the foldable display device, at least one of the first installation part and the second installation part is provided with the screen adjusting mechanism, the screen adjusting mechanism comprises the winding shaft and the transmission assembly, and the winding shaft is rotatably arranged at one end, away from the connecting piece, of the first installation part or the second installation part; when the first installation part and the second installation part are turned over, the first installation part and/or the second installation part can drive the corresponding transmission assembly of the screen adjusting mechanism to drive the winding shaft to rotate so as to wind or unwind the flexible screen. The automatic contraction and compensation of the flexible screen are realized, and the problem of the crease of the flexible screen is effectively solved; compared with the prior art, the pulling force fluctuation that flexible screen received is littleer, and under fold condition, flexible screen can clamp between first installed part and second installed part, is favorable to protecting flexible screen.

Description

Foldable display device

Technical Field

The invention relates to the technical field of screens, in particular to a foldable display device.

Background

Folding screen can satisfy people to the demand of big screen, can also realize folding, portable consequently receives more and more people's favor.

The existing folding screen has the following problems:

1) when the foldable screen is folded, the straight line and the curve on the transverse direction of the screen are mutually converted, so that the screen is redundant, the screen is folded, and the user experience is influenced;

2) although some folding screens are also provided with screen contraction compensation structures to improve the crease, most of the screen compensation structures need to utilize motors or springs and the like to provide power, so that the synchronism is poor, and the screen is greatly influenced by tension fluctuation;

3) the existing folding screen is not beautiful enough in shape and cannot protect the screen.

Disclosure of Invention

The invention aims to provide a foldable display device, which solves the problem of screen crease, improves the tension fluctuation of a screen and has a protective effect on the screen.

In order to realize the purpose, the following technical scheme is provided:

a foldable display device comprises a flexible screen, a connecting piece, a first mounting piece and a second mounting piece, wherein the first mounting piece and the second mounting piece are respectively pivoted on two sides of the connecting piece;

in the first installed part with in the second installed part, at least one of them is equipped with screen adjustment mechanism, screen adjustment mechanism includes:

the winding shaft is rotatably arranged at one end, away from the connecting piece, of the first mounting piece or the second mounting piece; the first end and/or the second end of the flexible screen are/is fixedly connected with the corresponding winding shaft;

the transmission assembly is used for driving the transmission assembly of the corresponding screen adjusting mechanism to drive the winding shaft to rotate so as to wind the flexible screen when the first mounting piece and the second mounting piece are turned over to enable the first mounting piece and the second mounting piece to approach each other; when the first installation part and the second installation part are turned over so that the first installation part and the second installation part deviate from each other, the first installation part and/or the second installation part can drive the transmission assembly of the corresponding screen adjusting mechanism to drive the winding shaft to rotate so as to unwind the flexible screen.

As an alternative to the foldable display device, the actuating assembly comprises:

the supporting gear is fixedly arranged on the connecting piece;

the winding gear is fixedly arranged on the winding shaft;

a gear set including a plurality of intermeshing drive gears, the plurality of drive gears each being rotatably disposed on the first mount or the second mount; the input of gear train with support gear engagement, the output of gear train with the rolling gear meshing.

As an alternative to the foldable display device, the number of said transmission gears is an odd number.

As an alternative to the foldable display device, the first mounting member is fixedly provided with a first connecting shaft, and the first connecting shaft is rotatably connected with the connecting member;

the second installation part is fixedly provided with a second connecting shaft, and the second connecting shaft is rotatably connected with the connecting piece.

As an alternative to a foldable display device, the foldable display device has a folded state in which an end of the first mounting section facing away from the connecting member abuts an end of the second mounting section facing away from the connecting member; in the unfolded state, the top surface of the first mounting part and the top surface of the second mounting part are positioned on the same plane;

switching from the folded state to the unfolded state, wherein the first connecting shaft rotates by an angle a1, and the distance between the axis of the first connecting shaft and the flexible screen in the unfolded state is r 1; the second connecting shaft rotates by an angle a2, and the distance between the axis of the second connecting shaft and the flexible screen in the unfolded state is r 2;

when first installed part and second installed part all are equipped with when screen adjustment mechanism, then on the first installed part screen adjustment mechanism's a part of rolling axle rolling the length of flexible screen is: 2 rr 1 x 2a1/360 °, the length of the flexible screen of the portion of the take-up reel of the screen adjustment mechanism on the second mount being: 2 tr 2 x 2a2/360 °;

when only the first mounting part or the second mounting part is provided with the screen adjusting mechanism, the length of a part of the flexible screen wound by the winding shaft of the screen adjusting mechanism on the first mounting part or the second mounting part is as follows: 2 pi r1 x 2a1/360 ° +2 pi r2 x 2a2/360 °.

As an alternative of the foldable display device, a first supporting sleeve for supporting the flexible screen is sleeved outside the first connecting shaft, and the outer diameter of the first supporting sleeve is r 1;

the outside cover of second connecting axle is equipped with and is used for supporting the second of flexible screen supports the cover, the external diameter of first support cover is r 2.

As an alternative to the foldable display device, the outer circumferential surface of the first support sleeve is tangent to the plane;

the peripheral surface of the second support sleeve is tangent to the plane.

As an alternative of the foldable display device, a winding support sleeve is sleeved on the outer side of the winding shaft and is fixedly connected with the winding shaft, the first end and/or the second end of the flexible screen are/is fixedly connected with the corresponding winding support sleeve, and the peripheral surface of the winding support sleeve is tangent to the plane.

As an alternative of the foldable display device, when the first mounting member and the second mounting member are both provided with the screen adjusting mechanisms, the support gears of the two screen adjusting mechanisms are respectively rotatably sleeved on the first connecting shaft and the second connecting shaft;

when only the first mounting part or the second mounting part is provided with the screen adjusting mechanism, the supporting gear of the screen adjusting mechanism is rotatably sleeved on the first connecting shaft or the second connecting shaft.

As an alternative to the foldable display device, the flexible screen further has a third end and a fourth end opposite to each other along a second direction, the second direction is perpendicular to the first direction, and the third end and the fourth end are slidably connected to both sides of the first mounting member and the second mounting member, respectively.

Compared with the prior art, the invention has the beneficial effects that:

according to the foldable display device, when the first mounting piece and the second mounting piece are turned over to fold or unfold the flexible screen, the first mounting piece and/or the second mounting piece can drive the corresponding transmission assembly to drive the winding shaft to rotate so as to wind or unwind the flexible screen, so that the automatic contraction and compensation of the flexible screen are realized, and the problem of crease marks of the flexible screen is effectively solved; compared with the prior art, the pulling force fluctuation that flexible screen received is littleer, and under fold condition, flexible screen can clamp between first installed part and second installed part, is favorable to protecting flexible screen.

Drawings

Fig. 1 is a first schematic structural diagram of a foldable display device in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a foldable display device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a foldable display device in an unfolded state according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a foldable display device in a folded state according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a connection relationship between the first mounting member and the second mounting member and the screen adjusting mechanism according to the embodiment of the present invention.

Reference numerals:

1. a flexible screen; 11. a first end; 12. a second end; 13. a third end; 14. a fourth end;

2. a connecting member;

3. a first mounting member; 31. a first connecting shaft; 311. a first support sleeve;

4. a second mount; 41. a second connecting shaft; 411. a second support sleeve;

5. a screen adjustment mechanism; 51. a winding shaft; 511. winding the support sleeve; 52. a transmission assembly; 521. a support gear; 522. a winding gear; 523. a transmission gear; 5231. a first drive gear; 5232. a second transmission gear; 5233. a third drive gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1 to 5, the present embodiment provides a foldable display device, which includes a flexible screen 1, a connecting member 2, a first mounting member 3 and a second mounting member 4, wherein the first mounting member 3 and the second mounting member 4 are respectively pivoted to two sides of the connecting member 2, the flexible screen 1 has a first end 11 and a second end 12 opposite to each other along a first direction, the first end 11 is connected to an end of the first mounting member 3 departing from the connecting member 2, and the second end 12 is connected to an end of the second mounting member 4 departing from the connecting member 2. The foldable display device has a folded state and an unfolded state, in the folded state, one end of the first mounting piece 3 departing from the connecting piece 2 is abutted against one end of the second mounting piece 4 departing from the connecting piece 2, in other words, the display surface of the flexible screen 1 is in a zigzag shape; in the unfolded state, the top surface of the first mounting part 3 and the top surface of the second mounting part 4 are located on the same plane, in other words, the flexible screen 1 is laid on the plane, and the display surface of the flexible screen 1 is planar.

The existing foldable display equipment is roughly divided into two types, one type is that two ends of a flexible screen are respectively and fixedly connected to two ends of a first mounting part and a second mounting part which deviate from each other, and the flexible screen does not have a contraction compensation function, so that redundancy exists when the flexible screen is folded, and creases are caused; the other type is that one end of the flexible screen is fixed, the other end of the flexible screen is connected with the winding mechanism, the winding mechanism is utilized to play a role in shrinkage compensation on the flexible screen so as to improve the crease, but the winding mechanism needs to utilize a motor or a spring and the like to provide power, so that the synchronism is poor, and the tension fluctuation borne by the screen is large.

In order to solve the above problem, in the foldable display device of the present embodiment, the first mounting member 3 and the second mounting member 4 are both provided with the screen adjusting mechanism 5, specifically, the screen adjusting mechanism 5 includes a winding shaft 51 and a transmission assembly 52, and the winding shafts 51 of the two screen adjusting mechanisms 5 are respectively rotatably provided at the ends of the corresponding first mounting member 3 and the corresponding second mounting member 4 away from the connecting member 2; the first end 11 and the second end 12 of the flexible screen 1 are fixedly connected with the corresponding winding shaft 51; when the first mounting piece 3 and the second mounting piece 4 are turned over to enable the first mounting piece 3 and the second mounting piece 4 to approach each other, the first mounting piece 3 and the second mounting piece 4 can drive the transmission assembly 52 of the corresponding screen adjusting mechanism 5 to drive the winding shaft 51 to rotate so as to wind the flexible screen 1; when the first installation part 3 and the second installation part 4 are turned over to make the first installation part 3 and the second installation part 4 deviate from each other, the first installation part 3 and the second installation part 4 can drive the transmission component 52 of the corresponding screen adjusting mechanism 5 to drive the winding shaft 51 to rotate so as to unwind the flexible screen 1. In other words, when first installed part 3 and the second installed part 4 of upset made the two close to each other in order to fold flexible screen 1, reached the purpose of shrink flexible screen 1 length, and then can effectively improve the crease, when first installed part 3 and the second installed part 4 of upset made the two deviate from each other in order to expand flexible screen 1, reached the purpose of compensation flexible screen 1 length.

When the first mounting part 3 and the second mounting part 4 are turned over to fold or unfold the flexible screen 1, the first mounting part 3 and the second mounting part 4 can drive the corresponding transmission assembly 52 to drive the winding shaft 51 to rotate so as to wind or unwind the flexible screen 1, so that the flexible screen 1 is automatically contracted and compensated, and the problem of creases of the flexible screen 1 is effectively solved; compared with the prior art, the pulling force fluctuation that flexible screen 1 received is littleer, and under fold condition, flexible screen 1 can press from both sides between first installed part 3 and second installed part 4, is favorable to protecting flexible screen 1.

In other embodiments, it can also be set as: the first installation part 3 or the second installation part 4 is provided with a screen adjusting mechanism 5, and the winding shaft 51 is rotatably arranged at one end of the first installation part 3 or the second installation part 4, which is far away from the connecting piece 2; one of the first end 11 and the second end 12 of the flexible screen 1 is fixedly connected with the winding shaft 51, and the other one of the first end 11 and the second end 12 of the flexible screen 1 is fixedly connected with one of the first mounting part 3 and the second mounting part 4 which is not provided with the screen adjusting mechanism 5; when the first mounting piece 3 and the second mounting piece 4 are turned over so that the first mounting piece 3 and the second mounting piece 4 are deviated from each other, the first mounting piece 3 or the second mounting piece 4 can drive the transmission assembly 52 of the corresponding screen adjusting mechanism 5 to drive the winding shaft 51 to rotate so as to unwind the flexible screen 1; when the first mounting part 3 and the second mounting part 4 are turned over to enable the first mounting part 3 and the second mounting part 4 to approach each other, the first mounting part 3 or the second mounting part 4 can drive the transmission component 52 of the corresponding screen adjusting mechanism 5 to drive the winding shaft 51 to rotate so as to wind the flexible screen 1. With such an arrangement, one less screen adjusting mechanism 5 can be provided, so as to achieve the purpose of simplifying the structure and also achieve the effects of the above-described embodiments. It can be understood that when only the first mounting member 3 is provided with the screen adjusting mechanism 5, the first mounting member 3 needs to be turned over to wind and unwind the flexible screen 1; when only second installed part 4 was equipped with screen adjustment mechanism 5, need upset second installed part 4 just can realize the rolling of flexible screen 1 and unreel.

Specifically, the transmission assembly 52 includes a supporting gear 521, a winding gear 522 and a gear set, wherein the supporting gear 521 is fixedly arranged on the connecting member 2; the winding gear 522 is fixedly arranged on the winding shaft 51; the gear set comprises a plurality of transmission gears 523 meshed with each other, and the plurality of transmission gears 523 are rotatably arranged on the first mounting part 3 or the second mounting part 4; the input of the gear set meshes with the support gear 521 and the output of the gear set meshes with the take-up gear 522. It can be understood that the supporting gear 521 is fixedly arranged on the connecting member 2, and therefore, the supporting gear 521 cannot rotate, when the first mounting member 3 and the second mounting member 4 are turned over, the plurality of transmission gears 523 in the same gear set can be turned over together with the first mounting member 3 or the second mounting member 4, so that the plurality of transmission gears 523 rotate to drive the winding gear 522 to rotate, that is, the winding shaft 51 rotates, and the purpose of winding or unwinding the flexible screen 1 is achieved. Adopt intermeshing's gear to produce drive power drive rolling axle 51 and rotate, compare with prior art, need not to set up power parts such as motor or spring, can make flexible screen 1 atress more even, can play the effect of protection to flexible screen 1.

In this embodiment, in order to wind the flexible screen 1 when the flexible screen 1 is folded, and unwind the flexible screen 1 when the flexible screen 1 is unfolded, the number of the transmission gears 523 needs to be set to be an odd number. Illustratively, the three transmission gears 523 are arranged in the direction from the support gear 521 to the winding gear 522, the three transmission gears 523 are sequentially marked as a first transmission gear 5231, a second transmission gear 5232 and a third transmission gear 5233, the first transmission gear 5231 is meshed with the support gear 521, and the third transmission gear 5233 is meshed with the winding gear 522. As shown in fig. 5, when the first mounting member 3 is turned clockwise, at this time, the foldable display device is switched from the unfolded state to the folded state, because the supporting gear 521 is fixedly disposed on the connecting member 2, the supporting gear 521 does not actually rotate, but the first mounting member 3 is turned clockwise, which can be regarded as that the supporting gear 521 rotates counterclockwise relative to the first mounting member 3, and further drives the first transmission gear 5231 to rotate clockwise relative to the first mounting member 3, the second transmission gear 5232 rotates counterclockwise relative to the first mounting member 3, the third transmission gear 5233 rotates clockwise relative to the first mounting member 3, and the rolling gear 522 rotates counterclockwise relative to the first mounting member 3, so that the flexible screen 1 can be rolled up, so as to shrink the flexible screen 1 that the middle area is increased due to folding, and effectively improve the crease. When the first installation part 3 is turned over anticlockwise, at the moment, the foldable display device is switched from a folded state to an unfolded state, the rotating directions of the supporting gear 521, the three transmission gears 523 and the winding gear 522 are opposite to those of the first installation part, namely, the winding gear 522 rotates clockwise relative to the first installation part 3 to drive the winding shaft 51 to rotate clockwise, and the flexible screen 1 is unwound to compensate the middle area. When the second mounting member 4 is turned over, the operation process and principle of the screen adjusting mechanism 5 disposed on the second mounting member 4 can be similar to the screen adjusting mechanism 5 disposed on the first mounting member 3, and details thereof are not repeated.

In this embodiment, the first mounting member 3 is fixedly provided with the first connecting shaft 31, and the first connecting shaft 31 is rotatably connected with the connecting member 2, so as to support and reinforce the end of the first mounting member 3 connected with the connecting member 2 by using the first connecting shaft 31, thereby preventing the end from deforming. The second installation part 4 is fixedly provided with a second connecting shaft 41, the second connecting shaft 41 is rotatably connected with the connecting piece 2, so that the second connecting shaft 41 is utilized to support and reinforce the end, connected with the connecting piece 2, of the second installation part 4, and the end is prevented from deforming.

Further, in the present embodiment, the first mounting member 3 and the second mounting member 4 are provided with the screen adjusting mechanisms 5, and the supporting gears 521 of the two screen adjusting mechanisms 5 are respectively rotatably sleeved on the first connecting shaft 31 and the second connecting shaft 41. In the screen adjusting mechanism 5 of the first mounting member 3, the supporting gear 521 is sleeved on the first connecting shaft 31 and is rotatably connected with the first connecting shaft 31, and the supporting gear 521 is supported by the first connecting shaft 31, so that the supporting gear 521 can be mounted more stably. In the screen adjusting mechanism 5 of the second mounting member 4, the supporting gear 521 is sleeved on the second connecting shaft 41 and is rotatably connected with the second connecting shaft 41, and the supporting gear 521 is supported by the second connecting shaft 41, so that the supporting gear 521 can be mounted more stably. In other embodiments, when only the first mounting member 3 is provided with the screen adjusting mechanism 5, the supporting gear 521 of the screen adjusting mechanism 5 is rotatably sleeved on the first connecting shaft 31; when only the second mounting member 4 is provided with the screen adjusting mechanism 5, the supporting gear 521 of the screen adjusting mechanism 5 is rotatably sleeved on the second connecting shaft 41

In other embodiments, the first connecting shaft 31 and the second connecting shaft 41 may also be both fixedly disposed on the connecting member 2, the first mounting member 3 is rotatably connected to the first connecting shaft 31, the second mounting member 4 is rotatably connected to the second connecting shaft 41, so as to directly sleeve and fix the supporting gear 521 on the corresponding first connecting shaft 31 or second connecting shaft 41, and the mounting manner of the supporting gear 521 is simpler.

In this embodiment, the folding state is switched to the unfolding state, the angle through which the first connecting shaft 31 rotates is a1, and the distance between the axis of the first connecting shaft 31 and the flexible screen 1 in the unfolding state is r 1; the second connecting shaft 41 rotates by an angle a2, and the distance between the axis of the second connecting shaft 41 and the flexible screen 1 in the unfolded state is r 2. The length to be compensated for by a portion of the flexible screen 1 located on the first mounting member 3 is 2 rr 1 × 2a1/360 °, and the length to be compensated for by a portion of the flexible screen 1 located on the second mounting member 4 is 2 rr 2 × 2a2/360 °.

Further, in the screen adjusting mechanism 5 of the first mount 3, switching from the folded state to the unfolded state, the angle through which the winding shaft 51 rotates is a11, the distance between the axis of the winding shaft 51 and the flexible screen 1 is R1, the number of teeth of the supporting gear 521 is z11, the rotating speed of the supporting gear 521 is n11, the number of teeth of the winding gear 522 is z15, the rotating speed of the winding gear 522 is n15, according to the gear ratio formula: n15/n11 is z11/z15, a11/a1 is n15/n11 is z11/z15, then a11 is a1 is z11/z15, and the length of a part of the flexible screen 1 wound by the winding shaft 51 is as follows: 2 pi R1 x 2a11/360 °. In the screen adjusting mechanism 5 of the second mount 4, the screen adjusting mechanism is switched from the folded state to the unfolded state, the angle rotated by the winding shaft 51 is a12, the distance between the axis of the winding shaft 51 and the flexible screen 1 is R2, the number of teeth of the supporting gear 521 is z21, the rotating speed of the supporting gear 521 is n21, the number of teeth of the winding gear 522 is z25, the rotating speed of the winding gear 522 is n25, according to the gear ratio formula: n25/n21 is z21/z25, a12/a2 is n25/n21 is z21/z25, then a12 is a2 is z21/z25, and the length of a part of the flexible screen 1 wound by the winding shaft 51 is as follows: 2 pi R2 x 2a12/360 °. In this embodiment, 2 pi R1 × 2a1/360 ° -2 pi R1 × 2a11/360 °, and 2 pi R2 × 2a2/360 ° -2 pi R2 × 2a12/360 °, that is, the length of the winding shaft 51 of the two screen adjusting mechanisms 5 winding the flexible screen 1 is just the redundant length of the flexible screen 1 in the folded state, so that the folding problem can be solved, and the flexible screen 1 cannot be excessively wound, and the flexible screen 1 can be protected.

In other embodiments, when only the first mount 3 or the second mount 4 is provided with the screen adjusting mechanism 5, the length of the portion of the flexible screen 1 wound up by the winding shaft 51 of the screen adjusting mechanism 5 on the first mount 3 or the second mount 4 is: 2 pi R1 × 2a1/360 ° +2 pi R2 × 2a2/360 °, in other words 2 pi R1 × 2a11/360 ° +2 pi R1 × 2a1/360 ° +2 pi R2 × 2a2/360 °, or 2 pi R2 × 2a12/360 ° -2 pi R1 × 2a1/360 ° +2 pi R2 × 2a2/360 °.

Optionally, the connecting element 2 is embodied as connecting discs, and there are three connecting discs, the three connecting discs are arranged at intervals along the axial direction of the first connecting shaft 31 and the second connecting shaft 41, and the first connecting shaft 31 and the second connecting shaft 41 sequentially penetrate through the three connecting discs and are rotatably connected with the connecting discs.

Optionally, a first supporting sleeve 311 for supporting the flexible screen 1 is sleeved outside the first connecting shaft 31, and an outer diameter of the first supporting sleeve 311 is r 1; the outer side of the second connecting shaft 41 is sleeved with a second supporting sleeve 411 for supporting the flexible screen 1, and the outer diameter of the first supporting sleeve 311 is r 2. Further, the outer peripheral surface of the first support sleeve 311 is tangent to the plane; the outer circumferential surface of the second support sleeve 411 is tangent to the plane. And then the first supporting sleeve 311 and the second supporting sleeve 411 can be used for supporting the flexible screen 1, which is beneficial to flattening the flexible screen 1 when being unfolded.

Optionally, a winding support sleeve 511 is sleeved outside the winding shaft 51, the winding support sleeve 511 is fixedly connected with the winding shaft 51, in this embodiment, the first end 11 and the second end 12 of the flexible screen 1 are fixedly connected with the corresponding winding support sleeve 511, and the peripheral surface of the winding support sleeve 511 is tangent to the plane, so that in the unfolded state, the display surface of the flexible screen 1 is a plane, and the display effect is better. In other embodiments, when only the first mounting member 3 or the second mounting member 4 is provided with the screen adjusting mechanism 5, the first end 11 or the second end 12 of the flexible screen 1 is fixedly connected with the corresponding rolling support sleeve 511.

Optionally, flexible screen 1 still has along the relative third end 13 of second direction and fourth end 14, and the second direction is perpendicular with the first direction, and third end 13 and fourth end 14 sliding connection are in the both sides of first installed part 3 and second installed part 4 respectively, can make flexible screen 1 move steadily folding and the in-process that expandes, are favorable to protecting flexible screen 1. Specifically, the spout has all been seted up to the both sides of first installed part 3 and second installed part 4, and the third end 13 and the fourth end 14 of flexible screen 1 all are equipped with the slider with spout sliding connection.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A foldable display device comprises a flexible screen (1), a connecting piece (2), a first mounting piece (3) and a second mounting piece (4), wherein the first mounting piece (3) and the second mounting piece (4) are respectively pivoted on two sides of the connecting piece (2), the flexible screen (1) is provided with a first end (11) and a second end (12) which are opposite along a first direction, the first end (11) is connected with one end, deviating from the connecting piece (2), of the first mounting piece (3), and the second end (12) is connected with one end, deviating from the connecting piece (2), of the second mounting piece (4);

it is characterized in that the preparation method is characterized in that,

at least one of the first mounting part (3) and the second mounting part (4) is provided with a screen adjusting mechanism (5), and the screen adjusting mechanism (5) comprises:

the winding shaft (51) is rotatably arranged at one end, away from the connecting piece (2), of the first mounting piece (3) or the second mounting piece (4); the first end (11) and/or the second end (12) of the flexible screen (1) are/is fixedly connected with the corresponding winding shaft (51);

the transmission assembly (52) is used for driving the transmission assembly (52) of the corresponding screen adjusting mechanism (5) to drive the winding shaft (51) to rotate so as to wind the flexible screen (1) when the first mounting part (3) and the second mounting part (4) are turned over to enable the first mounting part (3) and the second mounting part (4) to approach each other; when the first installation part (3) and the second installation part (4) are turned over to enable the first installation part (3) and the second installation part (4) to deviate from each other, the first installation part (3) and/or the second installation part (4) can drive the transmission assembly (52) of the corresponding screen adjusting mechanism (5) to drive the winding shaft (51) to rotate so as to unwind the flexible screen (1).

2. The foldable display device of claim 1, wherein the transmission assembly (52) comprises:

the supporting gear (521) is fixedly arranged on the connecting piece (2);

a winding gear (522) fixedly arranged on the winding shaft (51);

a gear set including a plurality of intermeshing drive gears (523), the plurality of drive gears (523) each being rotatably provided to the first mount member (3) or the second mount member (4); the input end of the gear set is meshed with the supporting gear (521), and the output end of the gear set is meshed with the winding gear (522).

3. The foldable display device according to claim 2, wherein the number of transmission gears (523) is odd.

4. The foldable display device of claim 2, wherein the first mounting member (3) is fixedly provided with a first connecting shaft (31), and the first connecting shaft (31) is rotatably connected with the connecting member (2);

the second mounting piece (4) is fixedly provided with a second connecting shaft (41), and the second connecting shaft (41) is rotatably connected with the connecting piece (2).

5. A foldable display device according to claim 4, characterized in that it has a folded state, in which an end of the first mounting (3) facing away from the connector (2) abuts an end of the second mounting (4) facing away from the connector (2), and an unfolded state; in the unfolded state, the top surface of the first mounting part (3) and the top surface of the second mounting part (4) are positioned on the same plane;

switching from the folded state to the unfolded state, wherein the first connecting shaft (31) rotates by an angle a1, and the distance between the axis of the first connecting shaft (31) and the flexible screen (1) in the unfolded state is r 1; the second connecting shaft (41) rotates by an angle a2, and the distance between the axis of the second connecting shaft (41) and the flexible screen (1) in the unfolded state is r 2;

when the first installation part (3) and the second installation part (4) are both provided with the screen adjusting mechanism (5), the length of the flexible screen (1) of a part of the winding shaft (51) of the screen adjusting mechanism (5) on the first installation part (3) is as follows: 2 rr 1 x 2a1/360 °, the length of the flexible screen (1) of the portion of the screen adjustment mechanism (5) wound up by the winding shaft (51) on the second mounting (4) being: 2 tr 2 x 2a2/360 °;

when only the first mounting part (3) or the second mounting part (4) is provided with the screen adjusting mechanism (5), the length of the flexible screen (1) of a part rolled by the rolling shaft (51) of the screen adjusting mechanism (5) on the first mounting part (3) or the second mounting part (4) is as follows: 2 pi r1 x 2a1/360 ° +2 pi r2 x 2a2/360 °.

6. The foldable display device according to claim 5, wherein the first connecting shaft (31) is externally sleeved with a first supporting sleeve (311) for supporting the flexible screen (1), the first supporting sleeve (311) having an outer diameter r 1;

the outside cover of second connecting axle (41) is equipped with and is used for supporting second support cover (411) of flexible screen (1), the external diameter of first support cover (311) is r 2.

7. The foldable display device of claim 6, wherein the outer circumference of the first support sleeve (311) is tangent to the plane;

the peripheral surface of the second support sleeve (411) is tangent to the plane.

8. The foldable display device according to claim 7, wherein a winding support sleeve (511) is sleeved outside the winding shaft (51), the winding support sleeve (511) is fixedly connected with the winding shaft (51), the first end (11) and/or the second end (12) of the flexible screen (1) is fixedly connected with the corresponding winding support sleeve (511), and the outer peripheral surface of the winding support sleeve (511) is tangent to the plane.

9. The foldable display device according to claim 4, wherein when the first mounting member (3) and the second mounting member (4) are provided with the screen adjusting mechanisms (5), the supporting gears (521) of the two screen adjusting mechanisms (5) are respectively rotatably sleeved on the first connecting shaft (31) and the second connecting shaft (41);

when only the first mounting part (3) or the second mounting part (4) is provided with the screen adjusting mechanism (5), the support gear (521) of the screen adjusting mechanism (5) is rotatably sleeved on the first connecting shaft (31) or the second connecting shaft (41).

10. The foldable display device according to claim 1, wherein the flexible screen (1) further has a third end (13) and a fourth end (14) opposite in a second direction, the second direction being perpendicular to the first direction, the third end (13) and the fourth end (14) being slidably connected to both sides of the first mounting member (3) and the second mounting member (4), respectively.