CN115909907B

CN115909907B - Stretchable device

Info

Publication number: CN115909907B
Application number: CN202310122081.1A
Authority: CN
Inventors: 张凯凯
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2024-05-28
Anticipated expiration: 2043-02-16
Also published as: CN115909907A

Abstract

The application relates to a stretchable device which comprises a stretchable screen, an elastic base material and a stretchable mechanism, wherein the stretchable screen and the stretchable mechanism are respectively positioned at two sides of the elastic base material. The circumference along the elastic substrate is provided with a plurality of first bellying, and first bellying is located the elastic substrate and is kept away from one side of scalable screen for be connected with telescopic machanism, make the elastic substrate can wrap up in telescopic machanism with the mode of covering, when telescopic machanism stretches the elastic substrate, can improve the homogeneity of stress at the surface that elastic substrate is connected with scalable screen, and then can reduce scalable screen and take place the possibility that pixel warp when being out of shape along with elastic substrate, be favorable to improving scalable screen's display effect. Along the direction of the plane that is perpendicular to scalable screen place, the projection of flexible substrate can cover the projection of scalable screen, makes scalable screen be located the more even position of stress in the flexible substrate, further reduces scalable screen and takes place the pixel distortion when being out of shape along with the flexible substrate.

Description

Stretchable device

Technical Field

The application relates to the technical field of electronic equipment, in particular to a stretchable device.

Background

At present, the display panel is connected at its edge to a stretching structure, and the display panel is stretched by the stretching structure to expand its display area, so that the display panel can be restored to its original display area after the stretching of the display panel is released. In the process of stretching the display panel by the stretching structure, stress concentration phenomenon can occur on the display panel, so that pixels on the display panel are distorted, and the display effect is further affected.

Disclosure of Invention

The application provides a stretchable device which is used for solving the problem of stress concentration of a display panel in the stretching process.

Embodiments of the present application provide a stretchable device comprising:

A retractable screen;

an elastic base material connected with one side of the retractable screen;

The telescopic mechanism is positioned at one side of the elastic base material away from the telescopic screen;

The projection of the elastic base material covers the projection of the telescopic screen along the direction perpendicular to the plane where the telescopic screen is located, a plurality of first protruding portions are arranged along the circumference of the elastic base material, the first protruding portions are located on one side, away from the telescopic screen, of the elastic base material, and the telescopic mechanism is connected with the first protruding portions.

The telescopic screen is connected with the telescopic mechanism through the elastic base material, and the telescopic mechanism can stretch the elastic base material, so that the telescopic screen is stretched, and the size of the telescopic screen is enlarged. Along the planar direction that the scalable screen place of perpendicular to, the projection of elastic substrate covers scalable screen, simultaneously, set up a plurality of first bellying along the circumference of elastic substrate, first bellying is located the one side that the scalable screen was kept away from to the elastic substrate for be connected with telescopic machanism, make the elastic substrate wrap up in telescopic machanism's surface through the mode of covering, when telescopic machanism takes place to warp, make the elastic substrate be provided with the surface of scalable screen in stress even, and then make the deformation of each part in the scalable screen even, be favorable to improving scalable screen's display effect.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

FIG. 1 is a top view of a stretchable device provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 3 is a top view of an elastic substrate according to an embodiment of the present application when the elastic substrate is unfolded;

FIG. 4 is a schematic structural diagram of a stretchable device according to an embodiment of the present application;

fig. 5 is a schematic structural view of a first embodiment of a telescopic member according to an embodiment of the present application;

FIG. 6 is an exploded view of a first embodiment of a telescoping member provided in accordance with an embodiment of the present application;

fig. 7 is a schematic structural diagram of a second telescopic member embodiment according to the present application;

FIG. 8 is an exploded view of a second embodiment of a telescoping member according to an embodiment of the present application;

fig. 9 is a schematic structural view of a third embodiment of a telescopic member according to the present application;

FIG. 10 is an exploded view of a third embodiment of a telescoping member provided in accordance with an embodiment of the present application;

FIG. 11 is an enlarged view of a portion of the position I of FIG. 10;

fig. 12 is a schematic structural view of a support member and a connecting member according to an embodiment of the present application.

Reference numerals:

1-a retractable screen;

2-an elastic substrate;

21-a first boss;

211-a second connection region;

3-telescoping mechanism;

31-telescoping member;

311-body portion;

311 a-limit grooves;

311 b-accommodation chamber;

312-a first mover;

312 a-a first cavity;

313-a second mover;

313 a-a second cavity;

314—a first connection region;

315-a second boss;

316-a third lobe;

317-a support;

317 a-connecting blocks;

318-connector;

319-fourth lobe.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

As shown in fig. 1 to 3, an embodiment of the present application provides a stretchable device, which includes a stretchable screen 1, an elastic base material 2, and a stretching mechanism 3, wherein the stretchable screen 1 and the stretching mechanism 3 are respectively connected to both sides of the elastic base material 2. In the direction perpendicular to the plane of the retractable screen 1, the projection of the elastic base material 2 can cover the projection of the retractable mechanism 3, and the retractable screen 1 can deform with the elastic base material 2. A plurality of first bosses 21 are provided along the circumferential direction of the elastic base material 2, the first bosses 21 being located at a side away from the retractable screen 1 for connection with the first bosses 21.

The telescopic mechanism 3 is connected to the first boss 21, and can stretch the first boss 21 in the longitudinal direction of the first boss 21, and further can stretch the portion of the elastic base material 2 where the stretchable screen 1 is provided, so that the stretchable screen 1 can deform along with the deformation of the elastic base material 2. The first protruding portion 21 is located the one side that scalable screen 1 was kept away from to elasticity substrate 2, makes elasticity substrate 2 can wrap up in the surface of telescopic machanism 3 with the mode of covering, when telescopic machanism 3 tensile first protruding portion 21, can improve the stress uniformity on the surface that elasticity substrate 2 was provided with scalable screen 1, has improved the homogeneity that each part of elasticity substrate 2 warp the range, and then is favorable to improving scalable screen 1 and warp the homogeneity, has reduced scalable screen 1 and has taken place the possibility of pixel distortion. The projection of the elastic base material 2 can cover the projection of the telescopic mechanism 3, so that the sectional area of one side, connected with the telescopic screen 1, of the elastic base material 2 is larger than that of the telescopic screen 1, the telescopic screen 1 can be positioned at the central position of the elastic base material 2, the uniformity of the telescopic screen 1 in stretching can be further improved, the possibility of pixel distortion in the telescopic screen 1 can be further reduced, and the display effect of the telescopic screen 1 can be improved.

In one possible embodiment, the elastic base material 2 may be a material having elasticity such as rubber, and may be deformed when stretched by the stretching mechanism 3, and may return to the original state after the stretching mechanism 3 releases the stretching of the elastic base material 2, so as to drive the retractable screen 1 to expand or contract.

As shown in fig. 4 and 5, in one possible embodiment, the telescopic mechanism 3 comprises a telescopic member 31, the telescopic member 31 being connected to the first boss 21, enabling the first telescopic member 31 to stretch the first boss 21 and thus the retractable screen 1.

The telescopic member 31 may be a frame of the telescopic mechanism 3, and a control device is disposed inside the telescopic mechanism 3, so as to control the length of the telescopic member 31, and further control the length of the first boss 21, so as to control the size of the retractable screen 1. The sectional shapes of the telescopic screen 1 and the elastic base material 2 are consistent, and the telescopic screen can be rectangular or other polygons, the first protruding parts 21 are arranged along the circumferential direction of the elastic base material 2, and each first protruding part 21 is provided with a telescopic mechanism 3 corresponding to the first protruding part, so that the telescopic mechanism 3 can stretch the elastic base material 2 along multiple directions.

As shown in fig. 5 and 6, in one possible embodiment, the telescopic member 31 includes a main body portion 311, a first moving member 312, and a second moving member 313, and the first moving member 312 and the second moving member 313 are respectively mounted at both ends of the main body portion 311 and are movable in directions approaching or separating from each other along a length direction of the main body portion 311.

When the first moving member 312 and the second moving member 313 move in the direction away from each other, the length of the expansion member 31 increases, the first boss 21 can be stretched, and thus the size of the retractable screen 1 increases, and when the first moving member 312 and the second moving member 313 move in the direction toward each other, the length of the expansion member 31 decreases, and the length of the first boss 21 decreases, and thus the size of the retractable screen 1 is controlled to decrease.

As shown in fig. 4,5 and 6, in one possible embodiment, the main body 311, the first moving member 312 and the second moving member 313 are each provided with a first connection region 314 on a side close to the first protrusion 21, the first connection region 314 in the main body 311 is located at an intermediate position of the main body 311, the first connection region 314 in the first moving member 312 is located at an end of the first moving member 312 away from the main body 311, and the first connection region 314 in the second moving member 313 is located at an end of the second moving member 313 away from the main body 311. The first protruding portion 21 includes at least three second connection regions 211, and along the length direction of the first protruding portion 21, a plurality of second connection regions 211 are arranged at intervals, so that the second connection regions 211 and the first connection regions 314 correspond to each other, and the first connection regions 314 and the second connection regions 211 can be bonded by an adhesive or can be connected by other means, so as to connect the expansion member 31 and the first protruding portion 21.

When the expansion and contraction member 31 is extended, the first moving member 312 and the second moving member 313 move in directions away from each other, and the first connecting region 314 is provided on the first moving member 312 and the second moving member 313 so as to be connected to the first projecting portion 21, whereby the first projecting portion 21 can be stretched, and the first connecting region 314 is provided on the main body portion 311, whereby the stability of the first projecting portion 21 when stretched can be improved, and the degree of deformation of each portion in the first projecting portion 21 can be made more uniform.

The first protruding portion 21 and the telescopic member 31 are partially connected through the first connecting region 314 and the second connecting region 211, so that the area of the deformable region in the first protruding portion 21 is increased, the deformation amplitude of the first protruding portion 21 can be increased when the telescopic member 31 stretches, and the uniformity of the deformation amplitude of each part of the elastic base material 2 can be improved.

As shown in fig. 5 and 6, in one possible embodiment, the first moving member 312 includes a first cavity 312a along the length direction of the telescopic member 31, the second moving member 313 includes a second cavity 313a, and the first moving member 312 and the second moving member 313 are provided with openings at sides close to each other, so that the main body portion 311 can extend into the first cavity 312a and the second cavity 313a, and can move along the first cavity 312a and the second cavity 313 a.

The first cavity 312a and the second cavity 313a can limit the movement direction of the first moving member 312 and the second moving member 313 relative to the main body 311, so that the first moving member 312 and the second moving member 313 move along the length direction of the telescopic member 31, which is beneficial to improving the stability of the telescopic member 31 when being extended or shortened.

As shown in fig. 5 and 6, in one possible embodiment, the main body 311 is provided with a second protrusion 315 on a side near the first protrusion 21, and the second protrusion 315 can pass through the sidewalls of the first moving member 312 and the second moving member 313 and abut against the first protrusion 21. The edge of the second protrusion 315, the edge of the first moving member 312, and the edge of the second moving member 313 may be located on the same plane.

After the elastic base material 2 is connected with the telescopic mechanism 3, the second protruding portion 315 can support the first protruding portion 21 in the elastic base material 2, when the first moving member 312 and the second moving member 313 move at the initial position or in the direction away from each other, the first protruding portion 21 can be supported by the second protruding portion 315, stability of the elastic base material 2 when deformation occurs can be improved, friction between the first protruding portion 21 and the first moving member 312 and the second moving member 313 can be reduced, and the first moving member 312 and the second moving member 313 can move relative to the main body 311 conveniently.

As shown in fig. 5 and 6, in one possible embodiment, a third protruding portion 316 is disposed on a side of the main body portion 311 near the retractable screen 1, and the third protruding portion 316 can pass through the first moving member 312 and the second moving member 313 and abut against the elastic base 2. The edge of the third protrusion 316, the edge of the first moving member 312, and the edge of the second moving member 313 may be located on the same plane.

When the first moving member 312 and the second moving member 313 move away from each other, the distance between the first moving member 312 and the second moving member 313 is increased, the third protrusion 316 can support the elastic substrate 2, reduce the possibility of the elastic substrate 2 being recessed, and reduce the possibility of the elastic substrate 2 extending between the first moving member 312 and the second moving member 313 when the telescopic member 31 is restored to the initial position, so that the first moving member 312 and the second moving member 313 can move more smoothly relative to the main body 311, and also can limit the relative positions between the first moving member 312, the second moving member 313 and the main body 311, thereby improving the effect of the telescopic mechanism 3 stretching the telescopic screen 1 through the elastic substrate 2.

As shown in fig. 5 and 6, in one possible embodiment, the main body 311 further includes a fourth protrusion 319, the fourth protrusion 319 is located on a side of the main body 311 away from the third protrusion 316, guide grooves corresponding to the fourth protrusion 319 are provided in the first moving member 312 and the second moving member 313, the guide grooves are in communication with the first cavity 312a or the second cavity 313a, and the fourth protrusion 319 can extend into the guide grooves and can move along the guide grooves, and can limit movement tracks of the first moving member 312 and the second moving member 313 relative to the main body 311.

As shown in fig. 7 and 8, in one possible embodiment, the telescoping member 31 includes a support 317, the support 317 being located on a side of the body portion 311 adjacent to the first boss 21 and between the second boss 315 and the third boss 316. The outer contour of the side of the supporting member 317 away from the main body 311 is arc-shaped, and two ends of the arc are respectively aligned with the second protrusion 315 and the third protrusion 316. The first moving member 312 and the second moving member 313 are located at both sides of the supporting member 317, respectively.

The outer contour of the portion of the first moving member 312 and the second moving member 313 between the second protrusion and the third protrusion is arc-shaped, and the outer contour of the supporting member 317 is also arc-shaped, and can be abutted against the elastic base material 2, so as to support the bending position of the first protrusion 21 in the elastic base material 2, and when the first moving member 312 and the second moving member 313 move in the direction away from each other, the supporting member 317 can support the elastic base material 2 between the first moving member 312 and the second moving member 313, so that the elastic base material 2 is attached to the telescopic member 31, and when the telescopic mechanism 3 stretches the elastic base material 2, the uniformity of deformation of each portion in the elastic base material 2 can be improved.

As shown in fig. 7 and 8, in one possible embodiment, the telescopic member 31 includes at least one support member 317, the support member 317 is located between the first moving member 312 and the second moving member 313, and the support member 317 is fixedly connected with the main body portion 311.

The support member 317 is fixedly connected with the main body 311, so that the connection strength between the support member 317 and the main body 311 can be improved, the dislocation between the support member 317 and the main body 311 is reduced, and the deformation of the elastic base material 2 or the unsupported elastic base material 2 is caused, which is beneficial to improving the stability of the stretchable device.

As shown in fig. 9, 10 and 11, in one possible embodiment, at least four supports 317 are provided at intervals along the length of the body portion 311. A limiting groove 311a is provided along a length direction of the body portion 311, and a portion of the support 317 can extend into the limiting groove 311a and can move along the limiting groove 311a with respect to the body portion 311.

The connecting block 317a is arranged on one side of the support member 317 connected with the main body portion 311, the connecting block 317a can extend into the limiting groove 311a, and the limiting groove 311a can limit the relative position between the support member 317 and the main body portion 311, so that the support member 317 can only move along the length direction of the main body portion 311. The distance between the adjacent supporting pieces 317 can be changed by sliding the supporting pieces 317 in the limiting grooves 311a, when the first moving piece 312 and the second moving piece 313 move in the direction away from each other, the distance between the adjacent supporting pieces 317 increases, when the first moving piece 312 and the second moving piece 313 move in the direction approaching each other, the distance between the adjacent supporting pieces 317 decreases, and when the distance between the first moving piece 312 and the second moving piece 313 changes, the distance between the adjacent supporting pieces 317 can change accordingly, so that the supporting force received by the part of the elastic base material 2 between the first moving piece 312 and the second moving piece 313 is more uniform.

As shown in fig. 9, 10 and 12, in one possible embodiment, a connecting member 318 is disposed between adjacent supporting members 317, the connecting member 318 can adjust the distance between the adjacent supporting members 317, and the supporting members 317 at two ends of the connecting member 318 are respectively connected to the first moving member 312 and the second moving member 313, so that the first moving member 312 and the second moving member 313 can move with respect to the main body 311 when moving.

The connecting piece 318 may be a diamond-shaped expansion bracket formed by rotatably connecting a plurality of connecting rods, the supporting piece 317 is connected with one side of the connecting piece 318, and when the first moving piece 312 and the second moving piece 313 move along the directions of approaching or separating from each other, the supporting piece 317 connected with the first moving piece 312 and the second moving piece 313 can squeeze or stretch the connecting piece 318, so that the connecting rods therein can rotate with each other, and the relative position between the adjacent supporting pieces 317 can be changed. The connection piece 318 is a diamond telescopic bracket, and can also enable the distance between the adjacent support pieces 317 to be consistent, so that the uniformity of the supporting force of each part of the elastic base material 2 is improved.

As shown in fig. 9 to 12, in one possible embodiment, the main body portion 311 is provided with a receiving cavity 311b, and at least part of the support member 317 can extend into the receiving cavity 311b and can be deformed within the receiving cavity 311b to adjust the relative position between the adjacent support members 317.

Because the connecting piece 318 is a diamond-shaped expansion bracket, when the distance between the supporting pieces 317 is adjusted, the space required by the deformation of the connecting piece 318 is larger, and the accommodating cavity 311b is arranged in the main body part 311, so that the connecting piece 318 can be accommodated, the possibility of interference between the connecting piece 318 and the main body part 311 is reduced, and the reliability of the connecting piece 318 when the distance between the supporting pieces 317 is adjusted is improved.

In one possible embodiment, the connecting member 318 between the adjacent supporting members 317 may also be a telescopic rod, which can be extended or shortened when the first moving member 312 and the second moving member 313 are relatively moved, so as to adjust the relative positions between the supporting members 317.

In one possible embodiment, the telescopic mechanism 3 comprises a plurality of telescopic members 31, the first connection areas 314 of the plurality of telescopic members 31 each facing the first protrusion 21, connecting the adjacent telescopic members 31 end to end, the first moving member 312 of one being connected to the second moving member 313 of the other.

Taking the scalable screen 1 in the stretchable device as the rectangle as an example, be provided with four first bellying 21 along the circumference of elastic substrate 2, if every bellying corresponds to be connected with one telescoping member 31, contained angle between the adjacent telescoping member 31 is 90, when the telescoping member 31 that sets up along stretchable device length direction stretches, can promote the telescoping member 31 that sets up along stretchable device width direction to the direction motion that keeps away from each other, and then stretch scalable screen 1 along stretchable device length direction, can stretch scalable screen 1 along stretchable device's width direction in the same way, adjacent telescoping member 31 fixed connection has reduced the possibility that adjacent telescoping member 31 takes place relative slip, the reliability when elastic substrate 2 is stretched has been improved, if every bellying corresponds to set up a plurality of telescoping members 31, when elastic substrate 2 extends along length direction, the second moving member 313 fixed connection of one of the adjacent telescoping member 31 that sets up along elastic substrate 2 length direction, make each part of elastic substrate 2 take place the range of warping along length direction unanimously, be favorable to reducing the possible emergence of the flexible screen of pixel of distortion.

The embodiment of the application provides a stretchable device, which comprises a stretchable screen 1, an elastic base material 2 and a stretching mechanism 3, wherein the stretchable screen 1 and the stretching mechanism 3 are respectively positioned at two sides of the elastic base material 2. The circumference along elastic substrate 2 is provided with a plurality of first bellying 21, and first bellying 21 is located the one side that elastic substrate 2 kept away from scalable screen 1 for be connected with telescopic machanism 3, make elastic substrate 2 can wrap up in telescopic machanism 3 with the mode of covering, when telescopic machanism 3 tensile elastic substrate 2, can improve the homogeneity of stress at the surface that elastic substrate 2 is connected with scalable screen 1, and then can reduce the possibility that takes place the pixel distortion when flexible screen 1 warp along with elastic substrate 2, be favorable to improving scalable screen 1's display effect. Along the direction perpendicular to the plane in which the flexible screen 1 is located, the projection of the flexible substrate 2 can cover the projection of the flexible screen 1, so that the flexible screen 1 is located at a position with relatively uniform stress in the flexible substrate 2, and the possibility of pixel distortion of the flexible screen 1 when deformed along with the flexible substrate 2 is further reduced.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stretchable device, the stretchable device comprising:

a retractable screen (1);

an elastic base material (2), wherein the elastic base material (2) is connected with one side of the telescopic screen (1);

The telescopic mechanism (3) is positioned on one side of the elastic base material (2) away from the telescopic screen (1);

the projection of the elastic base material (2) covers the projection of the telescopic screen (1) along the direction perpendicular to the plane where the telescopic screen (1) is located, a plurality of first protruding parts (21) are arranged along the circumferential direction of the elastic base material (2), the first protruding parts (21) are positioned on one side, away from the telescopic screen (1), of the elastic base material (2), and the telescopic mechanism (3) is connected with the first protruding parts (21);

The telescopic mechanism (3) comprises a telescopic piece (31), and the telescopic piece (31) is connected with the first protruding part (21) and is used for stretching the first protruding part (21);

The telescopic member (31) comprises a main body part (311), a first moving member (312) and a second moving member (313), wherein the first moving member (312) and the second moving member (313) are respectively positioned at two ends of the main body part (311) and can move relative to the main body part (311);

The main body part (311), the first moving member (312) and the second moving member (313) are all provided with a first connecting area (314), the first connecting area (314) is positioned at one side of the telescopic member close to the first protruding part (21), the first connecting area (314) in the main body part (311) is positioned between the first moving member (312) and the second moving member (313), and the first connecting area (314) in the first moving member (312) and the second moving member (313) is positioned at one end far away from the main body part (311);

The first protruding portion (21) comprises at least three second connecting areas (211), the second connecting areas (211) are arranged at intervals along the length direction of the first protruding portion (21), and the first connecting areas (314) are connected with the second connecting areas (211).

2. The stretchable device of claim 1, wherein the first moving member (312) comprises a first cavity (312 a) and the second moving member (313) comprises a second cavity (313 a), one end of the main body portion (311) is capable of extending into the first cavity (312 a) and the other end is capable of extending into the second cavity (313 a) and moving along the first cavity (312 a) and the second cavity (313 a).

3. The stretchable device according to claim 2, wherein a second protrusion (315) is provided on a side of the main body portion (311) close to the first protrusion (21), and the second protrusion (315) is capable of abutting against the first protrusion (21) through the first moving member (312) and the second moving member (313).

4. The stretchable device according to claim 2, wherein a third protrusion (316) is provided on a side of the main body portion (311) close to the stretchable screen (1), and the third protrusion (316) can pass through the first moving member (312) and the second moving member (313) to abut against the elastic base material (2).

5. The stretchable device according to claim 1, wherein the stretchable member (31) comprises a supporting member (317), the supporting member (317) is located on a side of the main body portion (311) close to the first protrusion portion (21), and a profile of a side away from the main body portion (311) is arc-shaped, and the first moving member (312) and the second moving member (313) are located on both sides of the supporting member (317) along a length direction of the main body portion (311), respectively.

6. The stretchable device of claim 5, wherein the stretching member (31) comprises at least one of the supporting members (317), the supporting member (317) being fixedly connected with the main body portion (311).

7. The stretchable apparatus of claim 5, wherein at least four of the supporting members (317) are provided at intervals along a length direction of the main body portion (311), the main body portion (311) is provided with a limiting groove (311 a), and a portion of the supporting member (317) is capable of extending into the limiting groove (311 a) and moving relative to the main body portion (311) along the limiting groove (311 a).

8. The stretchable apparatus of claim 6, wherein a connecting member (318) is provided between adjacent ones of the supporting members (317) for adjusting relative positions between the plurality of supporting members (317), the supporting members (317) at both ends being connected to the first moving member (312) and the second moving member (313), respectively.

9. The stretchable device of claim 8, wherein the main body portion (311) is provided with a receiving cavity (311 b), at least part of the connecting member (318) being located in the receiving cavity (311 b) and being deformable within the receiving cavity (311 b).

10. The stretchable device of claim 1, wherein the stretching mechanism (3) comprises a plurality of the stretching members (31), the first moving member (312) of an adjacent one of the stretching members (31) being connected with the second moving member (313) of the other.