CN115909907A

CN115909907A - Stretching device

Info

Publication number: CN115909907A
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: 2023-04-04
Anticipated expiration: 2043-02-16
Also published as: CN115909907B

Abstract

The application relates to a stretching device, which comprises a telescopic screen, an elastic base material and a telescopic mechanism, wherein the telescopic screen and the telescopic mechanism are respectively positioned on two sides of the elastic base material. Be provided with a plurality of first bellyings along elastic substrate's circumference, first bellyings are located one side that elastic substrate kept away from scalable screen for be connected with telescopic machanism, make elastic substrate wrap up in telescopic machanism with the mode of covering, when telescopic machanism tensile elastic substrate, can improve the homogeneity on the surface that elastic substrate and scalable screen are connected of stress, and then can reduce the scalable screen and take place the possibility of pixel distortion when warping along with elastic substrate, be favorable to improving the display effect of scalable screen. Along the direction perpendicular to the plane of 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 possibility that the pixel distorts when warping along with flexible substrate.

Description

Stretching device

Technical Field

The application relates to the technical field of electronic equipment, especially, relate to a device of can stretching.

Background

Conventionally, the display panel is stretched by connecting the edge of the display panel to a stretching structure to enlarge the display area of the display panel, and the display panel can be restored to the original display area after the stretching of the display panel is released. In the process of stretching the display panel by the stretching structure, the phenomenon of stress concentration occurs on the display panel, which causes the distortion of pixels on the display panel and further affects the display effect.

Disclosure of Invention

The application provides a stretching device for solve the problem of stress concentration of a display panel in the stretching process.

An embodiment of the present application provides a stretchable device, the stretchable device includes:

a retractable screen;

the elastic base material is connected with one side of the telescopic screen;

the telescopic mechanism is positioned on one side of the elastic base material, which is far away from the telescopic screen;

wherein, along the perpendicular scalable screen place planar direction, the projection of elastic substrate covers the projection of scalable screen is followed elastic substrate's circumference sets up a plurality of first bellyings, first bellyings is located elastic substrate keeps away from one side of scalable screen, telescopic machanism with first bellyings is connected.

Scalable screen passes through elastic substrate and is connected with telescopic machanism, and telescopic machanism can stretch elastic substrate, and then tensile scalable screen, enlarges the size of scalable screen. Along the planar direction at scalable screen place of perpendicular to, the projection of scalable screen is covered in the projection of elastic substrate, and simultaneously, circumference along elastic substrate sets up a plurality of first bellyings, one side of scalable screen is kept away from to first bellyingly positioned elastic substrate, be used for being connected with telescopic machanism, make elastic substrate can wrap up in telescopic machanism's surface through the mode of covering, when telescopic machanism takes place to warp, it is even to make elastic substrate be provided with stress in the surface of scalable screen, and then make the deformation of each part even in the scalable screen, be favorable to improving the display effect of scalable screen.

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.

Drawings

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

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a top view of an elastic substrate as laid out in accordance with an embodiment of the present application;

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

FIG. 5 is a schematic structural diagram of a first embodiment of a telescopic member according to the present application;

FIG. 6 is an exploded view of a first embodiment of a telescoping member according to the present application;

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

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

fig. 9 is a schematic structural diagram of a third embodiment of a telescopic member provided in the present application;

FIG. 10 is an exploded view of a third embodiment of a telescoping member according to the present application;

FIG. 11 is an enlarged view of a portion of FIG. 10 at location I;

fig. 12 is a schematic structural diagram of a supporting member and a connecting member provided in an embodiment of the present application.

Reference numerals:

1-a scalable screen;

2-an elastomeric substrate;

21-a first boss;

211-a second connection area;

3-a telescoping mechanism;

31-a telescoping member;

311-a body portion;

311 a-limit groove;

311 b-an accommodation chamber;

312-a first moving member;

312 a-a first cavity;

313-a second moving member;

313 a-a second cavity;

314-first connection region;

315-a second boss;

316-third boss;

317-a support member;

317 a-connecting block;

318-a connector;

319-fourth lobe.

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

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. 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 application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of 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 type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used 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 addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

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

The stretching mechanism 3 is connected to the first protruding portion 21, and can stretch the first protruding portion 21 in the longitudinal direction of the first protruding portion 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. First bellying 21 is located one side that scalable screen 1 was kept away from to elastic substrate 2, make elastic substrate 2 can wrap up in telescopic machanism 3's surface with the mode of covering, when telescopic machanism 3 stretches first bellying 21, can improve the stress uniformity that elastic substrate 2 was provided with scalable screen 1's surface, the homogeneity of each partial deformation range of elastic substrate 2 has been improved, and then be favorable to improving the homogeneity that scalable screen 1 warp, the possibility that scalable screen 1 takes place the pixel distortion has been reduced. The projection of elastic substrate 2 can cover the projection of telescopic machanism 3, makes the sectional area of the one side that elastic substrate 2 and telescopic screen 1 are connected be greater than the sectional area of telescopic screen 1, and telescopic screen 1 can be located the central point of elastic substrate 2 puts, can further improve the tensile homogeneity of telescopic screen 1, and then can further reduce the possibility of pixel distortion in telescopic screen 1, is favorable to improving the display effect of telescopic screen 1.

In a possible embodiment, the elastic substrate 2 may be made of elastic material such as rubber, and can be deformed when being stretched by the stretching mechanism 3, and can be restored to the original state after the stretching mechanism 3 releases the stretching of the elastic substrate 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 includes a telescopic member 31, and the telescopic member 31 is connected to the first protruding portion 21, so that the first telescopic member 31 can stretch the first protruding portion 21, and thus the retractable screen 1.

The extensible member 31 may be a frame of the extensible mechanism 3, and a control device is disposed inside the extensible mechanism 3, which can control the length of the extensible member 31, and further control the length of the first protruding portion 21, so as to control the size of the retractable screen 1. The cross-sectional shape of scalable screen 1 is unanimous with elastic substrate 2, can be rectangle or other polygons, and first bellying 21 sets up along elastic substrate 2's circumference, and every first bellying 21 all is provided with telescopic machanism 3 that corresponds with it, makes telescopic machanism 3 can stretch elastic substrate 2 along a plurality of directions.

As shown in fig. 5 and 6, in one possible embodiment, the telescopic member 31 includes a main body 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 two ends of the main body 311 and can move in a direction approaching or departing from each other along a length direction of the main body 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 telescopic member 31 is increased, and the first protruding portion 21 can be stretched, so that the size of the retractable screen 1 is increased, and when the first moving member 312 and the second moving member 313 move in the direction approaching each other, the length of the telescopic member 31 is decreased, the length of the first protruding portion 21 is decreased, and thus the size of the retractable screen 1 is controlled to be decreased.

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 provided with a first connection area 314 on a side close to the first protruding portion 21, the first connection area 314 in the main body 311 is located at a middle position of the main body 311, the first connection area 314 in the first moving member 312 is located at an end of the first moving member 312 far from the main body 311, and the first connection area 314 in the second moving member 313 is located at an end of the second moving member 313 far from the main body 311. The first protruding portion 21 includes at least three second connection regions 211, and the plurality of second connection regions 211 are disposed at intervals along the length direction of the first protruding portion 21, so that the second connection regions 211 correspond to the first connection regions 314, and the first connection regions 314 and the second connection regions 211 may be adhered by an adhesive member or may be connected by other methods, so as to connect the extensible member 31 and the first protruding portion 21.

When the expansion piece 31 extends, the first moving piece 312 and the second moving piece 313 move in the direction away from each other, the first connecting area 314 is arranged on the first moving piece 312 and the second moving piece 313, so that the first connecting area 314 is connected with the first protruding part 21, the first protruding part 21 can be stretched, the first connecting area 314 is arranged on the main body part 311, the stability of the first protruding part 21 when being stretched can be improved, and meanwhile, the deformation degree of each part in the first protruding part 21 can be more uniform.

The first protruding part 21 and the extensible member 31 are partially connected through the first connecting region 314 and the second connecting region 211, so that the area of a deformable region in the first protruding part 21 is increased, the deformation amplitude of the first protruding part 21 can be increased when the extensible member 31 is extended, 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, along the length direction of the telescopic member 31, the first moving member 312 includes a first cavity 312a, 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 moving direction of the first moving part 312 and the second moving part 313 relative to the main body 311, so that the first moving part 312 and the second moving part 313 move along the length direction of the telescopic part 31, which is beneficial to improving the stability of the telescopic part 31 when extending or shortening.

As shown in fig. 5 and 6, in one possible embodiment, a second protrusion 315 is disposed on a side of the main body 311 close to the first protrusion 21, and the second protrusion 315 can pass through side walls of the first moving member 312 and the second moving member 313 to 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 part 315 can support the first protruding part 21 in the elastic base material 2, when the first moving part 312 and the second moving part 313 move at the initial position or in the direction away from each other, the first protruding part 21 can be supported by the second protruding part 315, the stability of the elastic base material 2 when deforming can be improved, meanwhile, the friction between the first protruding part 21 and the first moving part 312 and the second moving part 313 can be reduced, and the first moving part 312 and the second moving part 313 can move relative to the main body part 311 conveniently.

As shown in fig. 5 and 6, in one possible embodiment, a third protrusion 316 is provided on a side of the main body 311 close to the retractable 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. 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 part 312 and the second moving part 313 move in the directions away from each other, the spacing distance between the first moving part 312 and the second moving part 313 can be increased, the third protruding part 316 can support the elastic base material 2, the possibility that the elastic base material 2 is sunken is reduced, when the extensible member 31 is restored to the initial position, the possibility that the elastic base material 2 extends into the space between the first moving part 312 and the second moving part 313 is reduced, the first moving part 312 and the second moving part 313 can move relative to the main body part 311 more smoothly, meanwhile, the relative positions between the first moving part 312 and the main body part 311 can also be limited, and further, the effect that the extensible mechanism 3 stretches the extensible screen 1 through the elastic base material 2 is improved.

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, a guide groove corresponding to the fourth protrusion 319 is provided in the first moving member 312 and the second moving member 313, the guide groove is communicated with the first cavity 312a or the second cavity 313a, the fourth protrusion 319 can extend into the guide groove and can move along the guide groove, and a movement track of the first moving member 312 and the second moving member 313 relative to the main body 311 can be limited.

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

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

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

The supporting member 317 is fixedly connected with the main body portion 311, so that the connection strength between the supporting member 317 and the main body portion 311 can be improved, the possibility that the elastic base material 2 is deformed or the elastic base material 2 is not supported due to the dislocation between the supporting member 317 and the main body portion 311 is reduced, and the stability of the stretchable device is improved.

As shown in fig. 9, 10 and 11, in one possible embodiment, at least four supporting members 317 are provided at intervals along the length direction of the body portion 311. A limit groove 311a is provided along a length direction of the body part 311, and a portion of the supporter 317 can extend into the limit groove 311a and can move relative to the body part 311 along the limit groove 311 a.

The connecting block 317a is arranged on one side of the supporting 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 supporting member 317 and the main body portion 311, so that the supporting member 317 can only move along the length direction of the main body portion 311. The supporting parts 317 slide in the limiting grooves 311a to change the distance between the adjacent supporting parts 317, when the first moving part 312 and the second moving part 313 move in the direction of being far away from each other, the distance between the adjacent supporting parts 317 is increased, when the first moving part 312 and the second moving part 313 move in the direction of being close to each other, the distance between the adjacent supporting parts 317 is decreased, when the distance between the first moving part 312 and the second moving part 313 is changed, the distance between the adjacent supporting parts 317 can be changed along with the change, and the supporting force applied to the part of the elastic base material 2 between the first moving part 312 and the second moving part 313 is more uniform.

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

The connecting member 318 may be a diamond-shaped expansion bracket formed by rotatably connecting a plurality of connecting rods to each other, the supporting member 317 is connected to one side of the connecting member 318, and when the first moving member 312 and the second moving member 313 move in a direction approaching to or away from each other, the supporting member 317 connected to the first moving member 312 and the second moving member 313 can press or stretch the connecting member 318, so that the connecting rods therein can rotate with each other, thereby changing the relative position between the adjacent supporting members 317. The connecting members 318 are diamond-shaped telescopic brackets, which can make the distance between adjacent supporting members 317 consistent, thereby improving the uniformity of the supporting force applied to each part of the elastic base material 2.

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

Because the connecting piece 318 is a diamond expansion bracket, when the distance between the supporting pieces 317 is adjusted, the space required for 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 in adjusting the distance between the supporting pieces 317 is improved.

In a possible embodiment, the connecting member 318 between the adjacent supporting members 317 can be a telescopic rod, and the telescopic rod 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 position between the supporting members 317.

In a possible embodiment, the telescopic mechanism 3 comprises a plurality of telescopic elements 31, the first connection zones 314 of the plurality of telescopic elements 31 each facing the first boss 21, so that adjacent telescopic elements 31 are coupled end to end, the first moving element 312 of one being coupled with the second moving element 313 of the other.

Taking the stretchable screen 1 in the stretchable device as an example, four first protruding portions 21 are arranged along the circumference of the elastic substrate 2, if each protruding portion is correspondingly connected to one extensible member 31, the included angle between adjacent extensible members 31 is 90 °, when the extensible members 31 arranged along the length direction of the stretchable device are stretched, the extensible members 31 arranged along the width direction of the stretchable device can be pushed to move in the directions away from each other, and then the stretchable screen 1 can be stretched along the length direction of the stretchable device, similarly, the stretchable screen 1 can be stretched along the width direction of the stretchable device, the adjacent extensible members 31 are fixedly connected, the possibility of relative sliding of the adjacent extensible members 31 is reduced, and the reliability of the elastic substrate 2 when stretched is improved, if a plurality of extensible members 31 are correspondingly arranged on each protruding portion, when the elastic substrate 2 is stretched along the length direction, the first moving member 312 of one of the adjacent extensible members 31 arranged along the length direction of the elastic substrate 2 is fixedly connected to the second moving member 313 of the other, so that the deformation of each portion of the elastic substrate 2 along the length direction is consistent, and the deformation amplitude of the elastic substrate 2 is favorable for reducing the possibility of pixel distortion of the stretchable screen 1.

The embodiment of the application provides a device of can stretching, including scalable screen 1, elastic substrate 2 and telescopic machanism 3, scalable screen 1 and telescopic machanism 3 are located the both sides of elastic substrate 2 respectively. Be provided with a plurality of first bellyings 21 along the circumference of elastic substrate 2, first bellyings 21 is located elastic substrate 2 and keeps away from one side of scalable screen 1, be used for being connected with telescopic machanism 3, make elastic substrate 2 wrap up in telescopic machanism 3 with the mode of covering, when telescopic machanism 3 stretches elastic substrate 2, can improve the homogeneity on the surface that elastic substrate 2 and scalable screen 1 are connected of stress, and then can reduce scalable screen 1 and take place the possibility that the pixel distorts when elastic substrate 2 warp, be favorable to improving scalable screen 1's display effect. Along the direction perpendicular to the plane of the retractable screen 1, the projection of the elastic substrate 2 can cover the projection of the retractable screen 1, so that the retractable screen 1 is located at a position where the stress in the elastic substrate 2 is more uniform, and the possibility of pixel distortion of the retractable screen 1 when the retractable screen is deformed along with the elastic substrate 2 is further reduced.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stretchable device, characterized in that the stretchable device comprises:

a retractable screen (1);

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

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

wherein, follow the perpendicular scalable screen (1) place planar direction, the projection of elasticity substrate (2) covers the projection of scalable screen (1) is followed the circumference of elasticity substrate (2) sets up a plurality of first bellying (21), first bellying (21) are located elasticity substrate (2) are kept away from one side of scalable screen (1), telescopic machanism (3) with first bellying (21) are connected.

2. Stretchable device according to claim 1, characterized in that said stretching mechanism (3) comprises a stretching member (31), said stretching member (31) being connected to said first protruding portion (21) for stretching said first protruding portion (21).

3. The stretchable device according to claim 2, wherein the stretchable member (31) comprises a main body portion (311), a first moving member (312) and a second moving member (313), the first moving member (312) and the second moving member (313) are respectively located at both ends of the main body portion (311) and are movable relative to the main body portion (311).

4. The stretchable device according to claim 3, wherein the main body portion (311), the first moving member (312) and the second moving member (313) are each provided with a first connection area (314), the first connection area (314) is located on a side of the stretchable member close to the first protruding portion (21), the first connection area (314) in the main body portion (311) is located between the first moving member (312) and the second moving member (313), and the first connection area (314) in the first moving member (312) and the second moving member (313) is located at an end far from the main body portion (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).

5. A stretchable device according to claim 4, wherein the first moving member (312) comprises a first cavity (312 a), the second moving member (313) comprises a second cavity (313 a), and the main body portion (311) has one end capable of extending into the first cavity (312 a) and the other end capable of extending into the second cavity (313 a) and moves along the first cavity (312 a) and the second cavity (313 a).

6. A stretchable device according to claim 5, wherein a side of the main body portion (311) close to the first protruding portion (21) is provided with a second protruding portion (315), and the second protruding portion (315) can pass through the first moving member (312) and the second moving member (313) to abut against the first protruding portion (21).

7. A stretchable device according to claim 5, wherein a side of the main body portion (311) close to the stretchable screen (1) is provided with a third protruding portion (316), and the third protruding portion (316) can pass through the first moving member (312) and the second moving member (313) to abut against the elastic base material (2).

8. The stretchable device according to claim 3, 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 protruding portion (21), and a side of the supporting member (317) away from the main body portion (311) is curved in profile, and the first moving member (312) and the second moving member (313) are respectively located on two sides of the supporting member (317) along a length direction of the main body portion (311).

9. The stretchable device according to claim 8, wherein the stretchable member (31) comprises at least one supporting member (317), and the supporting member (317) is fixedly connected with the main body portion (311).

10. The stretchable device according to claim 8, wherein at least four of the supporting members (317) are spaced along the 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 members (317) can extend into the limiting groove (311 a) and move along the limiting groove (311 a) relative to the main body portion (311).

11. The stretchable device according to claim 9, wherein a connecting member (318) is disposed between adjacent supporting members (317) for adjusting the relative positions between the plurality of supporting members (317), and the supporting members (317) at both ends are connected to the first moving member (312) and the second moving member (313), respectively.

12. Stretchable device according to claim 11, wherein the main body portion (311) is provided with a receiving cavity (311 b), and at least a portion of the connecting member (318) is located in the receiving cavity (311 b) and is capable of deforming within the receiving cavity (311 b).

13. A stretchable device according to claim 3, characterized in that said stretching mechanism (3) comprises a plurality of said stretching members (31), said first moving member (312) of one of the adjacent stretching members (31) being connected with said second moving member (313) of the other.