CN116360199A

CN116360199A - Projection screen

Info

Publication number: CN116360199A
Application number: CN202111612970.3A
Authority: CN
Inventors: 代琪; 陈波
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2023-06-30

Abstract

The application discloses a projection screen belongs to projection technical field. The projection screen includes: a plurality of support rims, curtain piece, mounting and tensioning subassembly. The tensioning assembly may be secured to the back of the curtain sheet when the curtain sheet is secured to the rectangular frame. The relative sliding between the first tensioning piece and the second tensioning piece in the tensioning assembly between the supporting frame and the fixing piece can be adjusted through the rotating piece, so that the supporting frame connected with the second tensioning piece can drive the curtain sheet to move in the direction parallel to the rectangular frame. Therefore, the tension of the curtain sheet in the direction parallel to the rectangular frame can be adjusted. When the tensioning assembly drives the supporting frame to move so that the distance between the supporting frame and the fixing piece is increased, the tensioning assembly can stretch the curtain sheet in the direction parallel to the rectangular frame. Therefore, the flatness of the curtain sheet can be effectively adjusted, and the display effect of the picture presented by the curtain sheet is good.

Description

Projection screen

Technical Field

The present disclosure relates to the field of projection technologies, and in particular, to a projection screen.

Background

With the continuous development of technology, projection devices are increasingly used in consumer work and life. Currently, projection devices mainly include a projection host and a projection screen. The light outlet of the projection host faces the projection screen to emit light beams to the projection screen, and the projection screen is used for receiving the light beams so as to display pictures.

Currently, projection screens mainly include a rectangular frame and a flexible curtain. The rectangular frame is attached to the back of the flexible curtain, and the edge of the flexible curtain is folded to wrap the edge of the rectangular frame, so that the rectangular frame can support the flexible curtain.

However, the flexible curtain is easy to turn up and bulge in the using process, so that the display effect of the picture presented by the projection screen is poor.

Disclosure of Invention

The embodiment of the application provides a projection screen. The problem of the relatively poor display effect of the picture of projection screen among the prior art can be solved, technical scheme is as follows:

in one aspect, there is provided a projection screen comprising:

the support frames are movably connected with the end parts of every two adjacent support frames, and the support frames can form a rectangular frame;

the curtain sheet is connected with the rectangular frame;

a fixing piece positioned on the back surface of the curtain sheet;

the tensioning assembly is positioned between the supporting frame and the fixing piece and is respectively connected with the fixing piece and the supporting frame;

wherein the tensioning assembly comprises: the first tensioning piece, second tensioning piece and rotation piece, first tensioning piece with rotate the piece and rotate to be connected, and with second tensioning piece sliding connection, rotate the piece and be configured to: when the rotating piece rotates, the second tensioning piece is driven to slide relative to the first tensioning piece, so that the distance between the supporting frame and the fixing piece is adjusted.

The beneficial effects that technical scheme that this application embodiment provided include at least:

a projection screen comprises a plurality of supporting frames, a curtain sheet, a fixing piece and a tensioning assembly. The tensioning assembly may be secured to the back of the curtain sheet when the curtain sheet is secured to the rectangular frame. The relative sliding between the first tensioning piece and the second tensioning piece in the tensioning assembly between the supporting frame and the fixing piece can be adjusted through the rotating piece, so that the supporting frame connected with the second tensioning piece can drive the curtain sheet to move in the direction parallel to the rectangular frame. Therefore, the tension of the curtain sheet in the direction parallel to the rectangular frame can be adjusted. When the tensioning assembly drives the supporting frame to move so that the distance between the supporting frame and the fixing piece is increased, the tensioning assembly can stretch the curtain sheet in the direction parallel to the rectangular frame. Therefore, the flatness of the curtain sheet can be effectively adjusted, and the display effect of the picture presented by the curtain sheet is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed 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 that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a projection screen according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of the projection screen shown in FIG. 1;

FIG. 3 is an effect diagram of tensioning of a tensioning assembly provided by an embodiment of the present application;

FIG. 4 is a schematic structural view of a tensioning assembly provided in an embodiment of the present application;

FIG. 5 is a cross-sectional view of the tensioning assembly of FIG. 4;

FIG. 6 is another cross-sectional view of the tensioning assembly of FIG. 4;

FIG. 7 is a cross-sectional view of another tensioning assembly provided by an embodiment of the present application;

FIG. 8 is a schematic view of a portion of a projection screen according to an embodiment of the present disclosure;

FIG. 9 is an exploded view of the projection screen of FIG. 8;

FIG. 10 is an effect diagram of tensioning a curtain sheet using a fixing member, a support rod, and a rotational connection member according to an embodiment of the present application;

FIG. 11 is a schematic view of a connection between a support bar and a support frame according to an embodiment of the present disclosure;

FIG. 12 is a schematic view of a rotary joint according to an embodiment of the present disclosure;

FIG. 13 is an exploded view of the rotary joint shown in FIG. 12;

FIG. 14 is a schematic view of another embodiment of a rotational joint according to the present disclosure;

FIG. 15 is a schematic view of a tensioning assembly coupled to a rotational coupling and a support bar according to an embodiment of the present disclosure;

FIG. 16 is a schematic illustration of the connection of a tensioning assembly to a sub-support bar shown in an embodiment of the present application;

FIG. 17 is a schematic view of a corner block according to an embodiment of the present disclosure;

FIG. 18 is a schematic view illustrating connection between a supporting frame and a corner block according to an embodiment of the present disclosure;

fig. 19 is a schematic view of another projection screen according to an embodiment of the present application.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a projection screen according to an embodiment of the present application, and fig. 2 is an exploded view of the projection screen shown in fig. 1. Projection screen 000 can include: a plurality of support borders 100, a curtain sheet 200, a fixture 300, and a tensioning assembly 400.

The ends of each two adjacent support rims 100 of the plurality of support rims 100 in the projection screen 000 may be movably connected, and the plurality of support rims 100 may enclose a rectangular frame. For example, the number of the plurality of supporting frames 100 may be four, and the four supporting frames 100 are sequentially connected end to form a rectangular frame.

The screen sheet 200 in the projection screen 000 may be connected to the rectangular frame, i.e., the screen sheet 200 may be connected to the side of the support bezel 100. In the present application, the curtain sheet 200 may be connected to the rectangular frame by means of adhesion, or may be connected by means of screw connection, which is not limited in the embodiment of the present application.

The fixture 300 in the projection screen 000 can be located on the back of the screen 200.

The tension assembly 400 in the projection screen 000 may be located between the support bezel 100 and the fixture 300, and the tension assembly 400 is connected to the support bezel 100 and the fixture 300, respectively. For a clearer view of the structure of the tensioning assembly, please refer to fig. 3, fig. 3 is a diagram showing the tensioning effect of the tensioning assembly according to the embodiment of the present application. Wherein the tensioning assembly 400 may comprise: a first tension member 401, a second tension member 402, and a rotation member 403. The first tensioning member 401 may be rotatably coupled to the rotating member 403, and the first tensioning member 401 may be slidably coupled to the second tensioning member 402. The rotator 403 may be configured to: when the rotating member 403 rotates, the second tensioning member 402 is driven to slide relative to the first tensioning member 401, so as to adjust the distance between the support frame 100 and the fixing member 300. It should be noted that, one of the first tensioning member 401 and the second tensioning member 402 may be connected to the supporting frame 100, and the other may be connected to the fixing member 300, which is not limited in comparison to the embodiment of the present application. The following embodiments are schematically illustrated with the first tensioning member 401 connected to the fixing member 300 and the second tensioning member 402 connected to the support frame 100.

Illustratively, the tension of the curtain sheet 200 is adjusted by the tension assembly 400 located between the support frame 100 and the fixture 300. First, the rotating member 403 in the tensioning assembly 400 is rotated, such that the rotating member 403 drives the second tensioning member 402 to slide relative to the first tensioning member 401. Then, the second tension member 402 drives the supporting frame 100 to move, and at the same time, the supporting frame 100 drives the side edge of the curtain sheet 200 connected to the supporting frame 100 to move in a direction parallel to the rectangular frame. Finally, the tensioning assemblies 400 connected with the supporting frames 100 in the rectangular frame drive the supporting frames 100 in the rectangular frame to move so as to adjust the side edges of the curtain sheet 200 to move in the direction parallel to the rectangular frame, and further adjust the tension of the curtain sheet 200 in the direction parallel to the rectangular frame.

In this application, the tension assembly 400 may be fixed to the rear surface of the curtain sheet 200 when the rectangular frame is fixed to the rear surface of the curtain sheet 200. Since the relative sliding between the first tension member 401 and the second tension member 402 in the tension assembly 400 between the support frame 100 and the fixing member 300 can be adjusted by the rotation member 403, the support frame 100 connected to the second tension member 402 can move the screen 200 in a direction parallel to the rectangular frame. Accordingly, the tension of the screen sheet 200 in the direction parallel to the rectangular frame can be adjusted. When the tension assembly 400 moves the supporting frame 100 to increase the distance from the fixing member 300, the tension assembly 400 can stretch the curtain sheet 200 in a direction parallel to the rectangular frame. Therefore, the flatness of the curtain sheet can be effectively adjusted, and the display effect of the picture presented by the curtain sheet is good.

In summary, the embodiments of the present application provide a projection screen, including: a plurality of support rims, curtain piece, mounting and tensioning subassembly. The tensioning assembly may be secured to the back of the curtain sheet when the curtain sheet is secured to the rectangular frame. The relative sliding between the first tensioning piece and the second tensioning piece in the tensioning assembly between the supporting frame and the fixing piece can be adjusted through the rotating piece, so that the supporting frame connected with the second tensioning piece can drive the curtain sheet to move in the direction parallel to the rectangular frame. Therefore, the tension of the curtain sheet in the direction parallel to the rectangular frame can be adjusted. When the tensioning assembly drives the supporting frame to move so that the distance between the supporting frame and the fixing piece is increased, the tensioning assembly can stretch the curtain sheet in the direction parallel to the rectangular frame. Therefore, the flatness of the curtain sheet can be effectively adjusted, and the display effect of the picture presented by the curtain sheet is good.

Alternatively, referring to fig. 3, 4 and 5, fig. 4 is a schematic structural diagram of a tensioning assembly according to an embodiment of the present application, and fig. 5 is a cross-sectional view of the tensioning assembly in fig. 4. The end of the first tensioning member 401 in the tensioning assembly 400 facing the second tensioning member 402 may have a receiving cavity 4011. The rotating member 403 may be located within the receiving chamber 4011 and rotatably coupled to a sidewall of the receiving chamber 4011. A portion of the second tension member 402 may be located within the accommodation chamber 4011, a portion may be located outside the accommodation chamber 4011, and a portion of the second tension member 402 located within the accommodation chamber 4011 may be in contact with the rotation member 403. In this way, by rotating the rotating member 403 rotatably connected to the first tensioning member 401, the rotating member 403 can drive the second tensioning member 402 to slide relative to the first tensioning member 401, so as to implement adjustment of the distance between the support frame 100 and the fixing member 300.

In an embodiment of the present application, the rotating member 403 in the tensioning assembly 400 may include: the support shaft 4031 and the rotor body 4032, the rotor body 4032 may be sleeved on the support shaft 4031. The support shaft 4031 may be fixed to a side wall of the housing chamber 4011, and the rotating member body 4032 may rotate around an axis of the support shaft 4031. The axis of the supporting shaft 4031 may not coincide with the axis of the rotor body 4032. In this case, since the axis of the support shaft 4031 is not coincident with the axis of the rotor body 4032. Therefore, the rotating member body 4032 rotates around the axis of the supporting shaft 4031, so that the rotating member body 4032 can drive the second tensioning member 402 to slide relative to the first tensioning member 401, so as to adjust the distance between the supporting frame 100 and the fixing member 300.

Alternatively, as shown in fig. 4, the sidewall of the first tension member 401 in the tension assembly 400 may have an arc chute 4012 in communication with the receiving chamber 4011 of the first tension member 401. The swivel 403 in the tensioning assembly 400 may further comprise: the adjusting lever 4033, the adjusting lever 4033 may be connected to the rotating member body 4032 through the arc chute 4012. Wherein the adjustment lever 4033 may be configured to: when sliding in the arc chute 4012, the rotating member body 4032 is driven to rotate around the axis of the supporting shaft 4031. Thus, an operator can conveniently drive the rotating member body 4032 to rotate by using the adjusting lever 4033. For example, when the tension of the curtain sheet needs to be adjusted, an operator slides in the arc chute 4012 by pushing the adjusting lever 4033, and then the adjusting lever 4033 can drive the rotating member body 4032 to rotate, so that the rotating member body 4032 can drive the second tensioning member 402 to slide relative to the first tensioning member 401, so as to adjust the distance between the support frame 100 and the fixing member 300.

In an embodiment of the present application, please refer to fig. 4 and 6, fig. 6 is another cross-sectional view of the tensioning assembly of fig. 4. The adjusting lever 4033 in the rotating member 403 may be a screw, and the rotating member body 4032 may have a first screw hole a1 screw-coupled with the screw. Wherein the screw may be configured to: when the screw passes through the first screw hole a1 and abuts against the inner wall of the housing chamber 4011, the rotating member 403 can be fixed. When the screw is out of contact with the side wall of the accommodating cavity 4011 and slides in the arc chute 4012, the rotating member body 4032 is driven to rotate around the axis of the supporting shaft 4031. For example, a screw may be coupled to the rotor body 4032 through a first threaded hole a1 in the rotor body 4032. When it is desired to adjust the tension of the curtain sheet 200 by the tension assembly 400, in this case, first, an operator rotates the screw so that the end of the screw is out of contact with the side wall of the accommodation chamber 4011 of the first tension member 401. Then, the driving screw slides in the arc chute 4012 to rotate the rotator body 4032, so that the rotator body 4032 can drive the second tensioning member 402 to slide relative to the first tensioning member 401. According to the adjustment requirement of the tension degree of the curtain sheet 200, after the rotating member body 4032 rotates to a designated position, the screw is rotated to enable the end of the screw to be abutted against the side wall of the accommodating cavity 4011, so that the rotating member 403 is fixed.

Alternatively, as shown in fig. 4, the arc chute 4012 on the side wall of the first tensioning member 401 may be arc-shaped, and the center of the arc chute 4012 may be located on the axis of the support shaft 4031. Thus, the efficiency of the operator driving the rotary member 401 is effectively improved while ensuring a larger rotational stroke of the rotary member body 4032.

In this embodiment, as shown in fig. 6, the side wall of the accommodating chamber 4011 in the first tensioning member 401 may have a limiting hole b1, and the rotating member body 4032 may have a through hole a2 communicating with the limiting hole. The sidewall of the first tension member 401 may have a second screw hole b2 communicating with the through hole a2. The support shaft 4031 in the rotary member 403 may include: a first sub-support shaft 4031a, a second sub-support shaft 4031b, and a third sub-support shaft 4031c. A portion of the first sub supporting shaft 4031a may be positioned in the limiting hole b1 and is in clearance fit with the limiting hole b 1. The second sub supporting shaft 4031b may be positioned in the through hole a2 in the rotator body 4032 and is clearance-fitted with the through hole a2. At least part of the third sub supporting shaft 4031c may have external threads, and at least part of the third sub supporting shaft 4031c may be connected with the second screw hole b2. Wherein the diameter of the second sub supporting shaft 4031b is smaller than the diameter of the third sub supporting shaft 4031c, and the diameter of the second sub supporting shaft 4031b is larger than the diameter of the first sub supporting shaft 4031 a. In this case, when the rotor body 4032 is positioned between the first sub-support shaft 4031a and the third sub-support shaft 4031c, the rotor body 4032 can be restrained in the axial direction of the rotor body 4032 to ensure that the rotor body 4032 is rotated only.

Alternatively, the rotor body 4032 in the rotor 403 may be a disk-shaped rotor body or a rod-shaped rotor body. For example, as shown in fig. 5, when the rotor body 4032 is a disk-shaped rotor body, it may be a roller. Referring to fig. 7, fig. 7 is a cross-sectional view of another tensioning assembly provided in an embodiment of the present application. When the rotor body 4032 is a rod-shaped rotor body, it may be a rocker. It should be noted that the embodiments of the present application are not limited in particular.

In the embodiment of the present application, as shown in fig. 5 and 7, the first tension member 401 may have a first guide groove 4013 on a sidewall thereof in communication with the accommodation chamber 4011. Projection screen 000 can further include: the first guide A1, the first guide A1 may pass through the first guide groove 4013 and be fixedly connected with a portion of the second tensioning member 402 located in the receiving chamber 4011. For example, when the rotating member 403 rotates, the first tensioning member 401 and the second tensioning member 402 have the first guide groove 4013 on the sidewall of the first tensioning member 401, and the first guide member A1 may be fixedly connected with the second tensioning member 402 through the first guide groove 4013. Therefore, the first tensioning member 401 and the second tensioning member 402 are not easy to shake in the direction perpendicular to the supporting frame 100, and the connection stability of the first tensioning member 401 and the second tensioning member 402 is good.

Alternatively, referring to fig. 8 and 9, fig. 8 is a schematic view of a portion of a structure of a projection screen according to an embodiment of the present application, and fig. 9 is an exploded view of the projection screen in fig. 8. Projection screen 000 can further include: at least two support bars 500 and a plurality of rotational connectors 600. At least two support bars 500 are in one-to-one correspondence with at least one set of two support frames 100 disposed opposite to each other. And one end of each supporting bar 500 is connected to the fixing member 300 through a rotating connection member 600, and the other end is connected to the corresponding supporting frame 100 through a rotating connection member 600. The tension assembly 400 may be coupled to the fixing member 300 and the support frame 100 through the support bar 500 and the rotation coupling member 600. Referring to fig. 10, fig. 10 is an effect diagram of tensioning a curtain sheet by using a fixing member, a supporting rod and a rotating connecting member according to an embodiment of the present application. Wherein the fixture 300 may be configured to: when moving toward the curtain sheet 200, the two opposite supporting frames 100 are driven to move toward each other by the rotating connection member 600 and the supporting rod 500.

In this application, the number of the at least two supporting rods 500 may be four, and correspondingly, the number of the plurality of rotating connectors 600 may be eight, one ends of the four supporting rods 500 are respectively connected with the four supporting frames 100 through the rotating connectors 600 in a rotating manner, and the other ends of the four supporting rods 500 are connected with the fixing members 300 through the rotating connectors 600 in a rotating manner. Thus, when the fixing member 300 is forced to move toward the curtain sheet 200, first, the support bar 500 can be rotated with respect to the rotation link 600; then, the support bar 500 drives the two opposite support frames 100 to move toward each other. Afterwards, the supporting frame 100 may drive the edges of the curtain sheet 200 to move in opposite directions, so as to achieve the tightness of the fixing member 300, the supporting rod 500, and the rotating connecting member 600 to the curtain sheet 200 in the short side direction of the rectangular frame and the long side direction of the rectangular frame.

It should be noted that, as shown in fig. 10, after the fixing member 300, the supporting rod 500 and the rotating connecting member 600 are used to tension the curtain sheet 200, the distance between the sides of the two opposite supporting frames 100 facing away from the fixing member 300 is greater than the width of the curtain sheet 200 when not tensioned, i.e. the distance between the sides of the opposite supporting frames facing away from the fixing member 300 is greater than the width of the curtain sheet 200 when not tensioned. In this manner, the fixing member 300 is in an arched state when the fixing member 300, the support bar 500, and the rotational connector 600 are mounted to the rear surface of the screen sheet 200. When a force is applied to the fixing member 300, the fixing member 300 moves in a direction approaching the screen 200, and the fixing member 300, the support bar 500 and the rotation connection member 600 drive the support frames 100 disposed opposite to each other to move in a direction away from the fixing member 300, so as to tighten the screen 200.

For example, please refer to fig. 11, fig. 11 is a schematic diagram illustrating connection between a support bar and a support frame according to an embodiment of the present application. The four support bars 500 may include: two first support bars 501 and two second support bars 502. The length direction of the two first support rods 501 is parallel to the long side direction of the rectangular frame, the length direction of the two second support rods 502 is parallel to the short side direction of the rectangular frame, the lengths of the two first support rods 501 are the same, and the lengths of the two second support rods 502 are the same. In this way, the tension assembly 400 can ensure that the tension of the curtain sheet 200 is consistent in the long side direction of the rectangular frame and the short side direction of the rectangular frame, and further the flatness of the curtain sheet 200 is better.

Alternatively, referring to fig. 12 and 13, fig. 12 is a schematic structural view of a rotary connector according to an embodiment of the present application, and fig. 13 is an exploded view of the rotary connector shown in fig. 12. The rotational connector 600 may include: a connector body 601 and a rotator 602. The connector body 601 is fixedly connected with the supporting frame 100 or the connecting rod 402, and the end part of the supporting rod 500 is rotatably connected with the connector body 601 through the rotating body 602. For example, when the fixing member 300 moves toward the direction of the curtain sheet 200, the rotating body 602 and the connecting member body 601 may rotate relatively, so that the connecting member body 601 may drive the two opposite supporting frames 100 to move in opposite directions, and further the supporting frames 100 may drive the edges of the curtain sheet 200 to move in opposite directions, so as to adjust the flatness of the curtain sheet 200 in the long side direction of the rectangular frame and the flatness of the curtain sheet 200 in the short side direction of the rectangular frame.

In this application, please refer to fig. 13 and 14, fig. 14 is a schematic structural view of another rotary connector according to an embodiment of the present application. The rotator 602 may include: the connector 6021, the first pin 6022, the second pin 6023, the first limiter 6024 and the second limiter 6025. One end of the adaptor 6021 is rotatably connected with the connector body 601 through a first pin 6022, and the other end of the adaptor 6021 is fixedly connected with the end of the support rod 500 through a second pin 6023. The first limiter 6024 is connected to the adapter 6021, the second limiter 6025 is connected to the connector body 601, and the first limiter 6024 may be configured to: when the adaptor 6021 rotates around the first pin 6022 to a designated position, the adaptor 6021 is cooperatively connected with the second stopper 6025 to restrict relative movement between the adaptor 6021 and the connector body 601. In this way, the flatness of the projection screen 000 at the time of flattening can be ensured.

In the embodiment of the application, when the adaptor 6021 rotates around the first pin shaft 6022 to a specified position through the first limiting member 6024 and the second limiting member 6025, the adaptor 6021 and the connector body 601 can be stably connected. As shown in fig. 14, one of the first stopper 6024 and the second stopper 6025 may include: a stopper cylinder c1, a stopper sphere c2, and a compression spring (not shown in the figure). The other of the first stopper 6024 and the second stopper 6025 may include: and a limit hole d1. The compression spring can be fixed in the limiting cylinder c1, one part of the limiting sphere c2 is located in the limiting cylinder c1, the other part of the limiting sphere c2 is located outside the limiting cylinder c1, and the limiting sphere c2 is connected with the end part of the compression spring. When the adaptor 6021 rotates to a designated position around the first pin shaft 6022, the limiting hole d1 communicates with the limiting cylinder c1, so that a portion of the limiting sphere c2 can be located in the limiting hole d1 to limit the relative movement between the adaptor 6021 and the connector body 601. In this application, the first stopper 6024 may include: the limiting cylinder c1, the limiting sphere c2 and the compression spring. The second stopper 6025 may include: a limit hole d1; alternatively, the first stopper 6024 may include: the limiting hole d1, the second limiting member 6025 may include: the limiting cylinder c1, the limiting sphere c2 and the compression spring. The embodiments of the present application are not limited in this regard. It should be noted that, in the following embodiments, the first limiting member 6024 includes the limiting hole d1, and the second limiting member 6025 may include: the limiting cylinder c1, the limiting sphere c2 and the compression spring are schematically illustrated as examples.

For example, in the process of stretching the curtain sheet 200 by using the fixing member 300, the supporting rod 500 and the rotating connecting member 600, the fixing member 300 moves toward the direction of the curtain sheet 200, and the adapting member 6021 can rotate around the first pin 6022 to a specified position, that is, until the limiting cylinder c1 is communicated with the limiting hole d1. The limiting sphere c2 pops up under the action of the elasticity of the compression spring, so that a part of the limiting sphere c2 is positioned in the limiting hole d1. In this way, the limit of the adaptor 6021 and the connector body 601 is achieved.

In this embodiment, there are three alternative implementations of the setting mode of the tensioning assembly, and the following schematic descriptions of the three alternative implementations are provided below:

referring to fig. 15, fig. 15 is a schematic view of a connection between a tensioning assembly and a rotating connector and a support rod according to an embodiment of the present application. One of the first tension member 401 and the second tension member 402 may be rotatably coupled to the rotation coupling member 600, and the other may be coupled to an end of the support bar 500. In this application, the first tension member 401 may be rotatably connected to the rotation connection member 600, and the second tension member 402 may be fixedly connected to the end of the support rod 500. Alternatively, the first tension member 401 may be fixedly coupled to the end of the support bar 500, and the second tension member 402 may be rotatably coupled to the rotation coupling member 600. It should be noted that, the present embodiment is not limited to this, and the following embodiments are all schematically illustrated by taking the fixed connection of the second tensioning member 402 and the end portion of the supporting rod 500 as an example, where the second tensioning member 402 is rotationally connected to the rotational connecting member 600. For example, a tensioning assembly 400 may be disposed between the adaptor 6021 and the support rod 500, where the tensioning assembly 400 can drive the support frame 100 to move away from the fixing member 300 by rotating the connecting member 600, so that the support frame 100 drives the edge of the curtain sheet 200 to move away from the fixing member 300, so as to tighten the curtain sheet 200.

Referring to fig. 16, fig. 16 is a schematic diagram illustrating connection of a tensioning assembly to a sub-support bar according to an embodiment of the present application. The support bar 500 may have two sub-support bars 500a, and a tension assembly 400 may be provided between the two sub-support bars 500a, and a first tension member 401 and a second tension member 402 in the tension assembly 400 are fixedly connected to ends of the two sub-support bars 500a, respectively. For example, the tensioning assembly 400 can drive the supporting frame 100 to move away from the fixing member 300 through the sub-supporting rod 500a connected with the supporting frame 100, so that the supporting frame 100 drives the edge of the curtain sheet 200 to move away from the fixing member 301, and the curtain sheet 200 is tensioned.

In a third alternative implementation, the tensioning assembly 400 may be located between the rotational connector 600 and the support bar 500 and between the two sub-support bars 500a at the same time. The connection of the tension assembly 400 to the pivotal connection 600 and the support bar 500a, and the connection of the tension assembly 400 to the two sub-support bars 500a may be referred to in the first and second possible manners described above.

Optionally, please refer to fig. 17, fig. 17 is a schematic structural diagram of a corner block according to an embodiment of the present application. Projection screen 000 can further include: a plurality of corners 700, each two adjacent support rims 100 of the plurality of support rims 100 may have a corner block 700 therebetween. For example, the number of the plurality of supporting frames 100 in the projection screen 000 may be four, the number of the plurality of corner blocks 700 may be four, and the ends of two adjacent supporting frames 100 in the four supporting frames 100 are connected by one corner block 700. As such, the four support rims 100 and the four corner blocks 700 may constitute a rectangular frame. In this application, corner block 700 in projection screen 000 may include: two interconnecting connection portions 701, which may correspond one-to-one with two adjacent support frames 100. Each of the two connection parts 701 may have a receiving groove 7011 for receiving an end of the corresponding support frame 100, and a second guide groove 7012 communicating with the receiving groove 7011. The length direction of the second guide groove 7012 on each connection portion 701 is parallel to the length direction of the support frame 100 corresponding to the connection portion 701. Referring to fig. 18, fig. 18 is a schematic diagram illustrating connection between a supporting frame and a corner block according to an embodiment of the present disclosure. Projection screen 000 can further include: and a second guide B1, wherein after the end of the support frame 100 is positioned in the receiving groove 7011 of the corresponding connection part 701, the second guide B1 may pass through the second guide groove 7012 and be fixedly connected with the portion of the support frame 100 positioned in the receiving groove 7011. In this case, the corner block 700 is connected to the support frame 100 by the second guide B1, and the corner block 700 can be prevented from falling off the support frame 100. In addition, since the two adjacent support frames 100 are connected through the corner block 700, the included angle of the two adjacent support frames 100 is limited through the corner block 700, thereby ensuring the regularity of the formed rectangular frame and simultaneously avoiding the problem that the corners of the rectangular frame form sharp angles.

For example, when the tension assembly 400 is used to adjust the tension of the screen sheet 200 in the short side direction of the rectangular frame and the tension of the screen sheet in the long side direction of the rectangular frame, the second guide B1 may slide in the second guide groove 7012 in the length direction of the second guide groove 7012 due to the connection of the tension assembly 400 to the two support rims 100 disposed opposite to each other. Accordingly, the two opposite support frames 100 can be moved toward each other to draw the curtain sheet 200 in a direction perpendicular to the support frames 100.

In this embodiment, as shown in fig. 17, the corner block 700 may be a right-angle corner block, where two connection portions 701 of the right-angle corner block each have a receiving groove 7011, and the end portions of the support frames 100 are inserted into the receiving grooves 7011, so that after the corner block 700 is connected with two adjacent support frames 100, an included angle formed by two adjacent support frames 100 can be ensured to be a right angle, so as to further ensure the regularity of the formed rectangular frame.

For example, after the projection screen 000 includes the parts to be taken home, first, the corners of the screen sheet 200 are fixed to the corner blocks 700; then, connecting the two ends of the supporting frame 100 with the corresponding corner blocks 700 respectively; then, the tensioning assembly 400 is connected with the supporting frames 100 in the rectangular frame through the rotating connecting piece 600, and at the moment, the tensioning assembly 400 can drive the two supporting frames 100 which are oppositely arranged to move in opposite directions, so that the tensioning of the curtain sheet 200 is realized, and the flatness of the curtain sheet 200 is ensured.

Alternatively, the receiving groove 7011 in the connection part 701 may have a first notch c1 toward one side of the support frame and a second notch c2 toward the curtain sheet 200. Wherein, the depth of the receiving groove 7011 in the direction perpendicular to the second notch c2 may be equal to the thickness of the support frame 100. In this way, after the end of the support frame 100 is positioned in the accommodating groove 7011, the surface of the support frame 100 facing the curtain sheet 200 and the surface of the corner block 700 facing the curtain sheet 200 are coplanar, and the flatness of the surface of the rectangular frame facing the curtain sheet 200 is better, so that the flatness of the rectangular frame and the curtain sheet 200 adhered to the rectangular frame is better.

Referring to fig. 19, fig. 19 is a schematic structural view of another projection screen according to an embodiment of the present application. Projection screen 000 can further include: suspension member 800, suspension member 800 may be fixedly coupled to mount 300 and the reference plane, respectively, to effect suspension of projection screen 000 from the reference plane. The reference plane may be a plane of a wall or other supporting object to which the suspension element is attached. Thus, for example, the suspension 800 may include: fastening screws, glue films or magnets. For example, when the suspension member is a film, one side of the film is connected to one side of the fixing member 300 away from the screen sheet 200, and the other side of the film is connected to the reference plane, so as to suspend the projection screen 000 on the reference plane.

In this embodiment, the curtain sheet 200 may be an optical curtain sheet, where an edge of the optical curtain sheet is connected to a side of the supporting frame 100, and a corner of the optical curtain sheet is connected to a side of the corner block 700. The optical curtain sheet is internally provided with a micro-mirror reflecting structure which can reflect light rays emitted by the laser projection equipment in a specific direction. Therefore, the light reflected by the micro-mirror reflecting structure can reach the eyes of the user to the greatest extent, and the user can watch a clearer picture. By way of example, the optical curtain sheet may include: circular fresnel optical film, black grid or white plastic screen, etc.

In this application, a flexible curtain may also be used for the display of the projected picture. The flexible curtain may include a curtain sheet and a flexible carrier (not shown), the curtain sheet may be fixed to one side of the flexible carrier, and edges of the flexible carrier protrude from four sides of the curtain sheet. The other side of the flexible carrier may be attached to a rectangular frame. The curtain sheet can be an optical film which is used for being matched with the projection host. The projection host is used for emitting a light beam to the optical film, and the optical film is used for receiving and reflecting the light beam to display a picture. The curtain sheet can be fixed on the flexible carrier by bonding. For example, the flexible carrier may be a flexible fabric, or may be other flexible members, as long as the flexible carrier can be bent at will and has a certain flatness after being tensioned, which is not limited in the embodiment of the present application. It should be noted that, the projection of the flexible carrier on the plane where the curtain sheet is located covers the curtain sheet or covers four sides of the curtain sheet, so as to ensure that the edge of the flexible carrier extends out of the four sides of the curtain sheet, and further ensure the flatness of the curtain sheet while tensioning the flexible carrier.

In combination with the above embodiments, the method for assembling the projection screen 000 provided in the embodiment of the present application is as follows:

after the parts included in the projection screen 000 are taken home, firstly, the ends of the supporting frame 100 are respectively connected with the corner blocks 700 to form a rectangular frame;

then, the corners of the curtain sheet 200 are adhered to the sides of the corner block 700 by adhesive films;

then, the edges of the curtain sheet 200 are connected with the sides of the supporting frame 100 to fix the rectangular frame to the back of the curtain sheet 200;

afterwards, the tensioning assembly 400 is connected with the supporting frame 100 and the fixing piece 300 in the rectangular frame through the supporting rod 500 and the rotating connecting piece 600;

finally, tensioning of the curtain 200 is accomplished by the tensioning assembly 400.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

1. A projection screen, comprising:

the curtain sheet is connected with the rectangular frame;

a fixing piece positioned on the back surface of the curtain sheet;

2. The projection screen of claim 1 wherein an end of the first tensioning member facing the second tensioning member has a receiving cavity; the rotating piece is positioned in the accommodating cavity and is rotationally connected with the side wall of the accommodating cavity; and part of the second tensioning piece is positioned in the accommodating cavity, part of the second tensioning piece is positioned outside the accommodating cavity, and part of the second tensioning piece positioned in the accommodating cavity can be in contact with the rotating piece.

3. The projection screen of claim 2 wherein the rotating member comprises: the rotary part body is sleeved on the supporting shaft and fixed on the side wall of the accommodating cavity, and the rotary part body can rotate around the axial lead of the supporting shaft;

the axial line of the supporting shaft is not coincident with the axial line of the rotating member body.

4. The projection screen of claim 3 wherein the side wall of the first tensioning member has an arcuate chute in communication with the receiving cavity, the rotating member further comprising: the adjusting rod penetrates through the arc-shaped chute and is connected with the rotating piece body;

wherein the adjustment lever is configured to: and the rotating piece body is driven to rotate around the axial lead of the supporting shaft by sliding in the arc-shaped sliding groove.

5. The projection screen of claim 4 wherein the adjustment lever is a screw and the rotor body has a first threaded bore threadedly coupled to the screw;

wherein the screw is configured to: when the screw rod passes through the first threaded hole and is in abutting connection with the side wall of the accommodating cavity, the rotating piece is fixed; when the screw rod is separated from contact with the side wall of the accommodating cavity and slides in the arc-shaped chute, the rotating piece body is driven to rotate around the axial lead of the supporting shaft.

6. The projection screen of claim 4, wherein the arc chute is arc-shaped, and the center of the arc chute is located on the axis of the support shaft.

7. The projection screen of claim 3 wherein the side wall of the receiving cavity has a limiting aperture, the adapter body has a through hole in communication with the limiting aperture, and the side wall of the first tension member has a second threaded aperture in communication with the through hole;

the support shaft includes: the first sub supporting shaft, the second sub supporting shaft and the third sub supporting shaft are arranged in the limiting hole and in clearance fit with the limiting hole, the second sub supporting shaft is arranged in the through hole and in clearance fit with the through hole, at least part of the third sub supporting shaft is provided with external threads, and at least part of the third sub supporting shaft is connected with the second threaded hole;

the diameter of the second sub supporting shaft is smaller than that of the third sub supporting shaft and larger than that of the first sub supporting shaft.

8. The projection screen of any one of claims 3 to 7, wherein the rotating member body is a rotating member body side having a disk shape or a rotating member body having a rod shape.

9. The projection screen of any one of claims 1 to 7, wherein the projection screen further comprises: at least two support bars and a plurality of rotational connectors;

the support frames are arranged in a one-to-one correspondence manner, one end of each support rod is connected with the fixing piece through one rotating connecting piece, the other end of each support rod is connected with the corresponding support frame through one rotating connecting piece, and the tensioning assembly is connected with the fixing piece and the support frame through the support rods and the rotating connecting pieces;

wherein the fixture is configured to: when moving towards the direction of the curtain sheet, the rotating connecting piece and the supporting rod drive the two supporting frames which are oppositely arranged to move in opposite directions.

10. The projection screen of claim 9 wherein one of the first and second tensioning members is rotatably connected to the rotational connection and the other is fixedly connected to an end of the support bar;

and/or the support rod is provided with two sub support rods, the tensioning assembly is arranged between the two sub support rods, and the first tensioning piece and the second tensioning piece in the tensioning assembly are respectively and fixedly connected with the end parts of the two sub support rods.