CN216792669U

CN216792669U - Projection screen and projection system

Info

Publication number: CN216792669U
Application number: CN202123172953.0U
Authority: CN
Inventors: 赵振宇; 黄丁发; 王霖; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-06-21
Anticipated expiration: 2031-12-14

Abstract

The application provides a projection screen and a projection system, wherein the projection screen comprises a projection curtain, a winding device, a supporting assembly and a driving device, and the projection curtain comprises a projection surface and a supporting surface; the winding device is connected with the projection curtain to drive the projection curtain to be wound or unfolded; the supporting component is arranged on one side of the supporting surface of the projection curtain; the driving device is in transmission connection with the supporting component so as to drive the supporting component and the projection curtain to be synchronously folded or unfolded; when the supporting component and the projection screen are synchronously unfolded, the supporting component forms a binding surface, and the binding surface is magnetically adsorbed on the supporting surface; when the supporting component and the projection curtain are synchronously folded, the supporting component and the projection curtain are separated from each other. When the supporting component is unfolded, the supporting component can be magnetically adsorbed to the projection curtain, so that the supporting component can support the projection curtain, and the strength of the projection curtain is enhanced; when the supporting component and the projection curtain are projected and folded, the supporting component and the projection curtain are separated from each other.

Description

Projection screen and projection system

Technical Field

The application relates to the technical field of projection, in particular to a projection screen and a projection system.

Background

The projection screen is a necessary component in the projection system, and has the characteristic of winding, and when the projection screen is not used, the projection screen can be wound into a scroll-shaped structure, so that the space is saved, and the carrying are convenient; when the projection screen needs to be used, the projection screen can be unfolded and unfolded, and the projection screen can be divided into an electric screen (which is unfolded from top to bottom) and a ground-pulling screen (which is unfolded from bottom to top) according to the unfolding direction, so that documents, pictures, videos and the like can be projected to a large screen.

The existing projection screen is simple in structure, generally only provides tension along the vertical direction, but not provides tension along the horizontal direction, so that when the projection screen is unfolded, different acting forces can be applied to different heights, the screen can be warped and wavy wrinkles and the like, and projection at the position can be distorted and deformed, so that the display effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a projection screen and a projection system, so as to improve the technical problem.

In a first aspect, an embodiment of the present application provides a projection screen, including a projection curtain, a winding device, a support assembly, and a driving device, where the projection curtain includes a projection surface and a support surface; the winding device is provided with a winding direction and is connected with the projection curtain to drive the projection curtain to wind or unfold; the supporting component is arranged on one side of the supporting surface of the projection curtain; the driving device is in transmission connection with the supporting component so as to drive the supporting component and the projection curtain to be synchronously folded or unfolded; when the supporting component and the projection curtain are synchronously unfolded, the supporting component forms a binding surface, and the binding surface is magnetically adsorbed on the supporting surface; when the supporting component and the projection curtain are synchronously folded, the supporting component and the projection curtain are separated from each other.

In some embodiments, the rolling direction is the same direction as the length direction of the projection screen.

In some embodiments, the projection curtain includes a screen membrane and a magnetic attraction layer, the projection surface is formed on the screen membrane, the magnetic attraction layer is disposed on a surface of the screen membrane opposite to the projection surface, the support surface is formed on a surface of the magnetic attraction layer away from the screen membrane, and the magnetic attraction layer is magnetically attracted to the support component.

In some embodiments, the driving device comprises a winding shaft, and one end of the support assembly is connected with the winding shaft and is wound on the winding shaft or unwound from the winding shaft under the driving of the winding shaft.

In some embodiments, the support assembly comprises a plurality of first hinge units, the plurality of first hinge units are arranged side by side along the winding direction of the winding shaft, and two adjacent first hinge units are hinged with each other; the first hinge unit positioned at one end part of the supporting component is connected with the winding shaft, and the first hinge unit positioned at the other end part of the supporting component is connected with the projection curtain.

In some embodiments, the first hinge unit includes a hinge body, the hinge body has sub-joint surfaces, the joint surfaces are formed when the sub-joint surfaces of the plurality of first hinge units are coplanar, two sides of the hinge body along the winding direction are respectively provided with a first hinge body and a second hinge body, the first hinge body is hinged to the second hinge body of the adjacent first hinge unit, and the second hinge body is hinged to the first hinge body of the adjacent first hinge unit.

In some embodiments, two sides of the hinge body along the rolling direction are provided with limiting surfaces, and when two adjacent hinge units relatively rotate to enable the two limiting surfaces to abut against each other, the sub-joint surfaces of the two adjacent first hinge units are coplanar.

In some embodiments, the winding shaft comprises a first winding shaft and a second winding shaft, the support assembly comprises a first hinge assembly and a second hinge assembly, the first hinge assembly and the second hinge assembly each comprise a plurality of first hinge units hinged side by side along the winding direction, one end of the first hinge assembly is connected with the projection curtain, the other end of the first hinge assembly is wound on the first winding shaft and is wound on or unwound from the winding shaft under the driving of the first winding shaft, one end of the second hinge assembly is connected with one end of the first hinge assembly, which is far away from the first winding shaft, and the other end of the second hinge assembly is wound on the second winding shaft and is wound on or unwound from the second winding shaft under the driving of the second winding shaft; in the unfolding process of the first hinge assembly and the second hinge assembly, the abutting surface is formed on the first hinge assembly, and the second hinge assembly is connected to the surface, opposite to the abutting surface, of the first hinge assembly in a embedding manner; the first hinge assembly and the second hinge assembly are separated from each other in the process of rolling.

In some embodiments, each first hinge unit of the first hinge assembly is provided with a first protrusion facing the second hinge assembly, each first hinge unit of the second hinge assembly is provided with a second protrusion facing the first hinge assembly, and the first protrusions and the second protrusions are staggered such that the first protrusions and the second protrusions are engaged with each other during the unfolding of the first hinge assembly and the second hinge assembly.

In some embodiments, the projection screen further comprises a first guide roller and a second guide roller, the first guide roller and the second guide roller are spaced apart and adjacent to the first winding shaft and the second winding shaft, and the support assembly and the projection screen are disposed between the first guide roller and the second guide roller.

In some embodiments, the driving device includes a driving portion and a plurality of synchronous belts, the supporting assembly includes a plurality of second hinge units, the plurality of second hinge units are arranged side by side along a winding direction of the winding device, two adjacent second hinge units are hinged to each other through a hinge shaft, and the two adjacent second hinge units are connected through two synchronous belt transmissions, and the driving portion is configured to drive one of the second hinge units to rotate so that the plurality of second hinge units are folded with each other.

In some embodiments, the supporting assembly further includes a fixing part, the plurality of second hinge units are disposed at two sides of the fixing part, and the plurality of second hinge units disposed at two sides of the fixing part are respectively hinged to the fixing part through a hinge shaft, and the fixing part is in transmission connection with an adjacent one of the second hinge units through a synchronous belt; the driving part is arranged on the fixing part and used for driving the second hinge units positioned on two sides of the fixing part to be folded mutually.

In some embodiments, an end of the second hinge unit is provided with a first fixed pulley, an end of the fixing part is provided with a second fixed pulley, the first fixed pulley and the second fixed pulley are connected by a synchronous belt drive, and an outer diameter of the second fixed pulley is twice an outer diameter of the first fixed pulley.

In a second aspect, the present application also provides a projection system, including the projection screen.

According to the projection screen and the projection system provided by the embodiment of the application, when the supporting component and the projection curtain are synchronously unfolded, the supporting component is magnetically adsorbed on the projection curtain, so that the supporting component can support the projection curtain, the strength of the projection curtain is enhanced, and the conditions that the projection curtain is warped and the like are avoided; when supporting component and projection curtain projection receipts were closed, supporting component and projection curtain separated from each other to can reduce the thickness of projection curtain when the rolling in coiling mechanism, avoid the volume of projection curtain rolling in coiling mechanism.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a projection system provided by an embodiment of the utility model;

FIG. 2 is a schematic view of a projection screen at a first viewing angle according to an embodiment of the present invention;

FIG. 3 is a partial perspective view of a projection screen provided in accordance with a first embodiment of the present invention at a second viewing angle;

FIG. 4 is a partial schematic view of a projection screen at a second viewing angle according to a first embodiment of the present invention;

fig. 5 is a partial schematic view of a first hinge unit provided in accordance with a first embodiment of the present invention;

FIG. 6 is a partial perspective view of a projection screen provided in accordance with a second embodiment of the present invention at a second viewing angle;

FIG. 7 is a partial schematic view of a support assembly according to a second embodiment of the present invention from a second perspective;

FIG. 8 is a schematic perspective view of a projection screen according to a third embodiment of the present invention at a first viewing angle;

fig. 9 is a schematic view of a support assembly according to a third embodiment of the present invention from a first perspective.

Detailed Description

In order to make the technical solution better understood by those skilled in the art, the technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

First embodiment

Referring to fig. 1, the present embodiment provides a projection system 100, which mainly includes a projection device 120 and a projection screen 110, where the projection screen 110 may be a flexible projection screen such as a fresnel screen, a wire grid screen, a direct-projection white plastic screen, and the projection device 120 and the projection screen 110 are separated by a certain distance, and when the projection system 100 operates, the projection device 120 generates an image and projects the image onto the projection screen 110, so that the projection screen 110 presents image content for a user to watch.

Referring to fig. 2, fig. 3 and fig. 4, the projection screen 110 mainly includes a projection curtain 10, a winding device 20, a supporting assembly 30 and a driving device 40, wherein the projection curtain 10 may have a projection surface 11 and a supporting surface 12 opposite to each other, and the projection surface 11 is used for bearing a projection image. The winding device 20 is connected to the projection curtain 10 to drive the projection curtain 10 to wind or unwind, and specifically, when the projection curtain 10 is not used, the projection curtain 10 can be wound on the winding device 20; when the projection curtain 10 is used, the winding device 20 rotates and drives the projection curtain 10 to be unfolded; when the projection curtain 10 needs to be retracted after the projection curtain 10 is used, the winding device 20 rotates reversely and drives the projection curtain 10 to wind. The supporting component 30 is located at one side of the supporting surface 12 of the projection curtain 10, the supporting component 30 is connected to the projection curtain 10 and is synchronously unfolded or rolled with the projection curtain 10, and when the supporting component 30 is unfolded, the supporting component 30 forms an attaching surface 31 for attaching to the supporting surface 12, so as to provide tension for supporting the projection curtain 10 to be tightened when the projection curtain 10 is unfolded. The driving device 40 is in transmission connection with the supporting component 30, and is used for driving the supporting component 30 to fold or unfold with the projection curtain 10 synchronously, that is, when the projection curtain 10 unfolds, the driving device 40 drives the supporting component 30 to unfold synchronously, and the attaching surface 31 formed by the supporting component 30 can be magnetically attached to the supporting surface 12; when the projection screen 10 is rolled, the driving device 40 drives the supporting component 30 to be synchronously folded, and the supporting component 30 and the projection screen 10 are separated from each other.

The projection screen 110 may further include a first housing 51 and a second housing 52, and the first housing 51 and the second housing 52 may be close to or far from each other. One end of the projection screen 110 may be located in the first housing 51, and the other end may be located in the second housing 52, and when the first housing 51 and the second housing 52 are far away from each other, the projection screen 110 is unfolded, and when the first housing 52 and the second housing 52 are close to each other, the projection screen 110 is rolled.

For example, in this embodiment, the first housing 51 may be fixed, and the winding device 20 is rotatably disposed in the first housing 51 and connected to one end of the projection curtain 10 located in the first housing 51. The winding device 20 has a winding direction, and the winding direction is the same as the length direction of the projection screen 10. In the conventional product, when the projection screen 10 is unfolded, the longitudinal direction thereof is substantially horizontal, and the width direction thereof is substantially vertical. In addition, the moving direction of the second housing 52 relative to the first housing 51 is the same as the winding direction, i.e., the winding direction, the longitudinal direction of the projection screen 10, and the relative moving direction of the second housing 52 and the first housing 51 are the same. When the second housing 52 moves in a lateral direction away from the first housing 51, the winding device 20 rotates in a direction opposite to the winding direction, so that the projection curtain 10 is unfolded; when the second housing 52 moves in the lateral direction close to the first housing 51, the winding device 20 rotates in the winding direction, so that the projection curtain 10 is wound.

Of course, in other embodiments, the rolling direction may be the same as the width direction of the projection curtain 10.

In this embodiment, the projection curtain 10 may include a screen membrane 13 and a magnetic absorption layer 14 for magnetically absorbing with the supporting component 30, wherein the projection surface 11 is formed on the screen membrane 13, the magnetic absorption layer 14 is disposed on a surface of the screen membrane 13 opposite to the projection, and the supporting surface 12 is formed on a side surface of the magnetic absorption layer 14 away from the screen membrane 13. The magnetic absorption layer 14 may be adhered to the screen membrane 13 such that the magnetic absorption layer 14 and the screen membrane 13 form an integral structure, or the magnetic absorption layer 14 may be synchronously unfolded and attached when the screen membrane 13 is unfolded, and separated from the screen membrane 13 and synchronously rolled when rolled. It should be understood that one of the magnetic layer 14 and the supporting member 30 may be a magnetic member with magnetism and the other may be magnetically attracted for the purpose of magnetic attraction between the magnetic layer 14 and the supporting member 30, and of course, the magnetic layer 14 and the supporting member 30 may be both magnetic members with magnetism and are not limited herein.

When the supporting assembly 30 and the projection curtain 10 are unfolded synchronously, the magnetic absorption layer 14 and the supporting assembly 30 are magnetically absorbed, so that the supporting assembly 30 can be attached to the projection screen 110 when being unfolded, the strength of the projection screen 110 is enhanced, and the projection screen 110 is prevented from being warped when being unfolded. Meanwhile, the magnetic absorption layer 14 is located between the screen membrane 13 and the support component 30, so that the magnetic absorption layer 14 plays a role in isolation and buffering, and the screen membrane 13 is prevented from being abraded due to the fact that the support component 30 directly contacts the screen membrane 13.

The driving device 40 may include a take-up reel 41, and the take-up reel 41 is used to take up the support assembly 30. The take-up shaft 41 may be disposed in the first housing 51 and may be located on a side of the support assembly 30 away from the projection curtain 10, and the direction of rotation of the take-up shaft 41 is opposite to the direction of rotation of the take-up device 20.

One end of the supporting component 30 extends into the first housing 51 and is wound up by the winding shaft 41, and the other end extends into the second housing 52 and is connected to one end of the projection screen 110 located in the second housing 52, so that the winding shaft 41 can drive the supporting component 30 and the projection screen 10 to synchronously unwind or wind up.

Referring to fig. 2, 3 and 4, the supporting assembly 30 includes a plurality of first hinge units 32, the plurality of first hinge units 32 are disposed side by side along the winding direction of the winding shaft 41, the first hinge unit 32 located at the end of the supporting assembly 30 extending into the first housing 51 is connected to the winding shaft 41, so that the end of the supporting assembly 30 extending into the first housing 51 can be wound around the winding shaft 41, and the first hinge unit 32 located at the end of the supporting assembly 30 extending into the second housing 52 is connected to the projection screen 10.

Referring to fig. 5, the first hinge unit 32 includes a hinge body 321, a first hinge body 323 and a second hinge body 324 are respectively disposed on two sides of the hinge body 321 along the rolling direction, the first hinge body 323 is hinged to the second hinge body 324 of the adjacent first hinge unit 32, and the second hinge body 324 is hinged to the first hinge body 323 of the adjacent first hinge unit 32, so that the adjacent two first hinge units 32 are hinged to each other.

The hinge body 321 further has sub-joint surfaces 322 and limiting surfaces 325 disposed on two sides along the rolling direction, wherein the sub-joint surfaces 322 are connected between the two limiting surfaces 325 on two sides of the hinge body 321, when two adjacent first hinge units 32 relatively rotate to the two adjacent limiting surfaces 325 of the hinge body 321 are mutually abutted, the sub-joint surfaces 322 of the two adjacent first hinge units 32 are coplanar, and when the sub-joint surfaces 322 of the plurality of first hinge units 32 are coplanar, the joint surface 31 is formed.

Referring to fig. 3 again, the projection screen 110 may further include a first guide roller 61 and a second guide roller 62, both the first guide roller 61 and the second guide roller 62 may be rotatably disposed in the first housing 51, and both the first guide roller 61 and the second guide roller 62 are closer to the second housing 52 than the winding device 20 and the winding shaft 41. Meanwhile, the first guide roller 61 and the second guide roller 62 are arranged at intervals, and the support assembly 30 and the projection screen 10 are arranged between the first guide roller 61 and the second guide roller 62 in a penetrating manner, so that the support assembly 30 and the projection screen 10 can be clamped by the first guide roller 61 and the second guide roller 62, and the situation that one end of the support assembly 30, which is positioned at the second shell 52, is deviated when moving is avoided.

In the projection screen 110 and the projection system 100 provided in this embodiment, when the supporting component 30 and the projection curtain 10 are synchronously unfolded, the supporting component 30 is magnetically adsorbed to the projection curtain 10, so that the supporting component 30 supports the projection curtain 10, thereby enhancing the strength of the projection curtain 10 and avoiding the projection curtain 10 from warping; when the support assembly 30 and the projection curtain 10 are projected and retracted, the support assembly 30 and the projection curtain 10 are separated from each other, so that the thickness of the projection curtain 10 when being rolled in the rolling device 20 can be reduced, and the volume of the projection curtain 10 when being rolled in the rolling device 20 is avoided.

In addition, the winding direction of the winding device 20 is the same as the length direction of the projection curtain 10, and meanwhile, the support assembly 30 and the projection curtain 10 are synchronously unfolded, so that the support assembly 30 provides tension along the horizontal direction for the projection curtain 10, and the support assembly 30 and the projection screen 10 are connected in an adsorption manner, so that the projection screen 10 is smoothly attached to the whole surface of the support assembly 30, and the projection curtain 10 can be unfolded from the side direction.

Second embodiment

The present embodiment provides a projection screen 110, which is different from the projection screen 110 provided by the first embodiment in that:

referring to fig. 2, fig. 6 and fig. 7, in this embodiment, the winding shaft 41 may include a first winding shaft 411 and a second winding shaft 412, and the first winding shaft 411, the second winding shaft 412 and the winding device 20 may all be installed in the first housing 51, wherein the first winding shaft 411 and the winding device 20 are both disposed on one side of the projection curtain 10 away from the supporting assembly 30, the second winding shaft 412 is disposed on one side of the supporting assembly 30 away from the projection curtain 10, the rotation directions of the first winding shaft 411 and the winding device 20 are the same, the rotation directions of the second winding shaft 412 and the winding device 20 are opposite, and the first winding shaft 411, the second winding shaft 412 and the winding device 20 rotate synchronously.

The support assembly 30 comprises a first hinge assembly 33 and a second hinge assembly 34, each of the first hinge assembly 33 and the second hinge assembly 34 comprises a plurality of first hinge units 32 hinged side by side along the winding direction, the first hinge unit 32 located at the end of the first hinge assembly 33 extending into the first housing 51 is connected with the first winding shaft 411, so that one end of the first hinge assembly 33 can be wound on the first winding shaft 411, the first hinge unit 32 located at the other end of the first hinge assembly 33 is connected with one end of the projection curtain 10 located in the second housing 52, so that the first hinge assembly 33 is driven by the first winding shaft 411 to be wound on the winding shaft 41, or synchronously unwound with the projection curtain 10. Similarly, the first hinge unit 32 located at the end of the second hinge assembly 34 extending into the first housing 51 is connected to the second winding shaft 412, such that one end of the second hinge assembly 34 can be wound around the second winding shaft 412, and the first hinge unit 32 located at the other end of the second hinge assembly 34 is connected to the first hinge unit 32 located at the end of the first hinge assembly located in the second housing 52, such that the second hinge assembly 34 is wound around the second winding shaft 412 under the driving of the second winding shaft 412, or is unwound synchronously with the first hinge assembly 33 and the projection curtain 10. When the projection curtain 10, the first hinge assembly 33 and the second hinge assembly 34 are unfolded, the first hinge assembly 33 is located between the projection curtain 10 and the second hinge assembly 34, the attachment surface 31 is formed on a surface of the first hinge assembly 33 facing the projection curtain 10, and the second hinge assembly 34 is embedded and connected to a surface of the first hinge assembly 33 opposite to the attachment surface 31; when the projection curtain 10, the first hinge assembly 33, and the second hinge assembly 34 are rolled up, the projection curtain 10, the first hinge assembly 33, and the second hinge assembly 34 are separated from each other.

For example, as shown in fig. 7, each of the first hinge units 32 of the first hinge assembly 33 may be provided with a first protrusion 331 facing the second hinge assembly 34, while each of the first hinge units 32 of the second hinge assembly 34 may be provided with a second protrusion 341 facing the first hinge assembly 33, and when the first hinge assembly 33 and the second hinge assembly 34 are unfolded and in a state of being attached to each other, the first protrusion 331 and the second protrusion 341 are alternately disposed and are fittingly coupled to each other in the winding direction.

In addition, similar to the first embodiment, the first guiding roller 61 and the second guiding roller 62 in this embodiment may also be rotatably disposed in the first housing 51 and adjacent to the first winding shaft 411, the second winding shaft 412 and the winding device 20, and the first hinge assembly 33, the second hinge assembly 34 and the projection curtain 10 are all disposed between the first winding shaft 411 and the second winding shaft 412.

In the projection screen 110 and the projection system 100 provided by this embodiment, the support assembly 30 is divided into the first hinge assembly 33 and the second hinge assembly 34, and when the first hinge assembly 33 and the second hinge assembly 34 are unfolded, they are embedded and connected with each other, so that the first hinge unit 32 of the first hinge assembly 33 can limit the rotation of the first hinge unit 32 of the second hinge assembly 34 matched with the first hinge unit 32, and conversely, the first hinge unit 32 of the second hinge assembly 34 can also limit the rotation of the first hinge unit 32 of the first hinge assembly 33 matched with the first hinge unit 32, so as to meet the requirement of limiting the rotation of the first hinge unit 32 of the first hinge assembly 33 and the first hinge unit 32 of the second hinge assembly 34 when being unfolded, and simultaneously, the strength of the support assembly 30 is enhanced, and the flatness of the projection curtain 10 when being unfolded is enhanced.

Third embodiment

in this embodiment, the driving device 40 replaces the winding shaft 41 with the driving portion 42 and the timing belt 43, and when the projection curtain 10 is wound, the driving device 40 drives the supporting assembly 30 to fold and fold synchronously.

Referring to fig. 8, the projection screen 110 may further include a third casing 53, the second casing 52 and the third casing 53 are located at two sides of the first casing 51, the first casing 51 may be fixed, and both the second casing 52 and the third casing 53 may move along the lateral direction of the first casing 51. Meanwhile, the second housing 52 and the third housing 53 may be provided with a winding device 20 therein, one end of the projection curtain 10 is connected to the winding device 20 in the second housing 52, and the other end is connected to the winding device 20 in the third housing 53, when the second housing 52 and the third housing 53 move along two sides of the first housing 51 respectively in a direction away from the first housing 51, the projection curtain 10 is unfolded.

Referring to fig. 8 and 9, the supporting assembly 30 may include a fixing portion 36 and a plurality of second hinge units 35, the fixing portion 36 is fixedly disposed on the first housing 51, the plurality of second hinge units 35 are disposed side by side along the winding direction of the winding shaft 41, two adjacent second hinge units 35 are hinged to each other through a hinge shaft 37, and two adjacent second hinge units 35 are drivingly connected through two synchronous belts 43. The plurality of second hinge units 35 are disposed at two sides of the fixing portion 36, the second hinge units 35 adjacent to two sides of the fixing portion 36 are all connected to the fixing portion 36 through hinge shafts 37 and are all in transmission connection with the fixing portion 36 through a timing belt 43, the second hinge units 35 far away from two sides of the fixing portion 36 are respectively connected to the second housing 52 and the third housing 53, and when the second housing 52 and the third housing 53 move respectively in a direction far away from the first housing 51, the supporting assembly 30 is unfolded.

The number of the driving portions 42 can be two, and can be set in the fixing portion 36, and the two driving portions 42 are respectively in transmission connection with the hinge units which are set in the fixing portion 36 and are adjacent to each other, and when the driving portion 42 drives one second hinge unit 35 to rotate, the second hinge units 35 can be driven to be folded with each other, so that the folding and folding effects of the supporting component 30 can be realized.

In a more specific embodiment, the second hinge unit 35 may include a first hinge body 352 and a second hinge body 353, the first hinge body 352 and the second hinge body 353 may also be hinged by a hinge shaft 37, and in one second hinge unit 35, the first hinge body 352 is closer to the fixing portion 36 than the second hinge body 353. In the second hinge unit 35, the first and

second hinge bodies

352 and 353 may be each fixedly provided with the first fixed pulley 351 that is relatively immovable, and the first fixed pulley 351 of the first hinge body 352 may be provided at the bottom and the second hinge body 353 may be provided at the top. In the first hinge body 352 and the second hinge body 353, the number of the first fixed pulleys 351 may be two, and the first hinge body 352 and the second hinge body 353 may be provided on both sides in the support body extending direction. It is to be appreciated that, in order to facilitate the setting of the timing belt 43 and avoid interference between the timing belts 43, the first fixed pulley 351 provided to the first hinge body 352 may be provided at the top of the first hinge body 352, and the first fixed pulley 351 provided to the second hinge body 353 may be provided at the bottom of the second hinge body 353.

The two adjacent second hinge units 35 are in transmission connection through two synchronous belts 43, specifically, the second hinge body 353 of one second hinge unit 35 is adjacent to the first hinge body 352 of the other second hinge unit 35, two ends of one synchronous belt 43 are respectively in transmission connection with the first fixed pulleys 351 adjacent to the two first hinge bodies 352, and two ends of the other synchronous belt 43 are respectively in transmission connection with the first fixed pulleys 351 adjacent to the two second hinge bodies 353.

Meanwhile, the top ends of the two sides of the fixed end can be respectively provided with a second fixed pulley 361, and the second fixed pulley 361 is in transmission connection with a first fixed pulley 351 at the far side of the adjacent first hinge body 352 at the same side through a synchronous belt 43. It can be understood that the second fixed pulley 361 is twice the outer diameter of the first fixed pulley 351, so as to ensure that the hinge shaft 37 connecting two adjacent hinge units can move in the direction in which the projection screen 10 is unfolded when the driving part 42 drives the movement of the plurality of hinge units.

The projection screen 110 and the projection system 100 provided by this embodiment drive the supporting component 30 to fold by setting the synchronous belt 43, so that the projection screen 110 can be designed to be of a symmetrical structure, the structure is simple, and the projection device 120 can be conveniently placed. The first hinge 352 and the second hinge 353 can adopt a frame structure to reduce the weight of the projection screen 110, and the projection screen 10 can be symmetrically unfolded to avoid the sagging of the middle position of the projection screen 10 after being unfolded, thereby ensuring the flatness of the projection screen 10.

In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise specifically stated or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through the inside of two elements, or they may be connected only through surface contact or through surface contact of an intermediate member. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first," "second," and the like are used merely for distinguishing between descriptions and not intended to imply or imply a particular structure. The description of the terms "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the application. In this application, the schematic representations of the terms used above are not necessarily intended to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this application can be combined and combined by those skilled in the art without conflicting.

The above embodiments are only for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A projection screen, comprising:

the projection screen comprises a projection surface and a supporting surface;

the winding device is provided with a winding direction and is connected with the projection curtain to drive the projection curtain to be wound or unfolded;

the supporting component is arranged on one side of the supporting surface of the projection curtain; and

the driving device is in transmission connection with the supporting component so as to drive the supporting component and the projection curtain to be synchronously folded or unfolded;

when the supporting component and the projection curtain are unfolded synchronously, the supporting component forms an attaching surface which is magnetically adsorbed on the supporting surface; when the supporting component and the projection curtain are synchronously folded, the supporting component and the projection curtain are separated from each other.

2. The projection screen of claim 1 wherein the roll direction is the same direction as the length direction of the projection screen.

3. The projection screen of claim 1, wherein the projection curtain comprises a screen membrane and a magnetic absorption layer, the projection surface is formed on the screen membrane, the magnetic absorption layer is disposed on a surface of the screen membrane opposite to the projection surface, the support surface is formed on a side surface of the magnetic absorption layer away from the screen membrane, and the magnetic absorption layer is configured to be magnetically absorbed by the support assembly.

4. The projection screen of any one of claims 1-3 wherein the drive mechanism includes a take-up reel, and one end of the support assembly is connected to the take-up reel and is driven by the take-up reel to wind or unwind the support assembly onto the take-up reel.

5. The projection screen of claim 4, wherein the support assembly comprises a plurality of first hinge units, the plurality of first hinge units are arranged side by side along the winding direction of the winding shaft, and two adjacent first hinge units are hinged with each other;

the first hinge unit located at one end of the supporting assembly is connected with the winding shaft, and the first hinge unit located at the other end of the supporting assembly is connected with the projection curtain.

6. The projection screen of claim 5, wherein the first hinge unit comprises a hinge body, the hinge body has a sub-joint surface, the sub-joint surface of the first hinge units forms the joint surface when the sub-joint surfaces are coplanar, and the hinge body is provided with a first hinge body and a second hinge body respectively along two sides of the rolling direction, the first hinge body is hinged to the second hinge body adjacent to the first hinge unit, and the second hinge body is hinged to the first hinge body adjacent to the first hinge unit.

7. The projection screen of claim 6, wherein the hinge body is provided with a limiting surface on each side along the rolling direction, and when two adjacent hinge units rotate relatively until the two limiting surfaces abut against each other, the sub-joint surfaces of two adjacent first hinge units are coplanar.

8. The projection screen of claim 4, wherein the winding shaft comprises a first winding shaft and a second winding shaft, the support assembly comprises a first hinge assembly and a second hinge assembly, the first hinge assembly and the second hinge assembly each comprise a plurality of first hinge units hinged side by side along the winding direction, one end of the first hinge assembly is connected with the projection screen, the other end of the first hinge assembly is wound on the first winding shaft and is wound on or unwound from the winding shaft under the driving of the first winding shaft, one end of the second hinge assembly is connected with one end of the first hinge assembly far away from the first winding shaft, the other end of the second hinge assembly is wound on the second winding shaft and is wound on or unwound from the second winding shaft under the driving of the second winding shaft;

during the unfolding process of the first hinge assembly and the second hinge assembly, the abutting surface is formed on the first hinge assembly, and the second hinge assembly is connected to the surface, opposite to the abutting surface, of the first hinge assembly in a jogged mode; the first hinge assembly and the second hinge assembly are separated from each other in the process of rolling.

9. The projection screen of claim 8, wherein each of the first hinge units of the first hinge assembly is provided with a first protrusion facing the second hinge assembly, each of the first hinge units of the second hinge assembly is provided with a second protrusion facing the first hinge assembly, and the first protrusions and the second protrusions are staggered such that the first protrusions and the second protrusions are engaged with each other during the unfolding of the first hinge assembly and the second hinge assembly.

10. The projection screen of claim 8 or 9, further comprising a first guide roller and a second guide roller spaced apart and adjacent to the first take-up spool and the second take-up spool, wherein the support assembly and the projection screen are disposed between the first guide roller and the second guide roller.

11. The projection screen of any one of claims 1-3, wherein the driving device comprises a driving portion and a plurality of synchronous belts, the supporting assembly comprises a plurality of second hinge units, the plurality of second hinge units are arranged side by side along a winding direction of the winding device, two adjacent second hinge units are hinged to each other through a hinge shaft, and two adjacent second hinge units are connected through two synchronous belts, and the driving portion is configured to drive one of the second hinge units to rotate so that the plurality of second hinge units are folded with each other.

12. The projection screen of claim 11, wherein the supporting assembly further comprises a fixing portion, the second hinge units are disposed on two sides of the fixing portion, and the second hinge units disposed on two sides of the fixing portion are respectively hinged to the fixing portion through one hinge shaft, and the fixing portion is in transmission connection with an adjacent second hinge unit through one synchronous belt;

the driving part is arranged on the fixing part and used for driving the second hinge units positioned on two sides of the fixing part to be folded.

13. The projection screen of claim 12 wherein the end of the second hinge unit is provided with a first fixed pulley, the end of the fixed portion is provided with a second fixed pulley, the first fixed pulley and the second fixed pulley are connected by the synchronous belt drive, and the outer diameter of the second fixed pulley is twice the outer diameter of the first fixed pulley.

14. A projection system comprising a projection screen according to any one of claims 1-13.