projection screen

Abstract

The present application discloses a projection screen, belonging to the field of projection technology. The projection screen includes: a plurality of support frames, a screen sheet, and a tensioning mechanism. When the screen sheet is fixed to a rectangular frame, the tensioning mechanism can be fixed to the back of the screen sheet, and the tensioning mechanism located on the back of the screen sheet can then be used to adjust the tension of the screen sheet in the short side direction and / or the long side direction of the rectangular frame. Because the tensioning mechanism is connected to at least one set of two opposing support frames in the rectangular frame, the tensioning mechanism can drive the two opposing support frames to move toward each other. Therefore, the tensioning mechanism can stretch the screen sheet in the short side direction and / or the long side direction of the rectangular frame, thereby effectively simplifying the process of adjusting the flatness of the screen sheet and thereby effectively improving the assembly efficiency of the projection screen.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a projection screen. Background Art

[0002] With the continuous development of technology, projection equipment is increasingly being used in consumers' work and daily lives. Currently, projection equipment mainly consists of a projection host and a projection screen. The light outlet of the projection host faces the projection screen, emitting a light beam to the projection screen, which receives the light beam to display the image.

[0003] Currently, projection screens mainly include a rectangular frame, a flexible screen, multiple first tensioning mechanisms, and multiple second tensioning mechanisms. The rectangular frame is attached to the back of the flexible screen, and the edges of the flexible screen are folded over to wrap around the edges of the rectangular frame. The multiple first tensioning mechanisms and the multiple second tensioning mechanisms are all located on the back of the rectangular frame. Among them, one end of each first tensioning mechanism is connected to the long side frame of the rectangular frame, and the other end is fixed to the edge of the flexible screen. The first tensioning mechanism can adjust the tension of the flexible screen in the short side direction of the rectangular frame; one end of each second tensioning mechanism is connected to the short side frame of the rectangular frame, and the other end is fixed to the edge of the flexible screen. The second tensioning mechanism can adjust the tension of the flexible screen in the long side direction of the rectangular frame.

[0004] To ensure the flatness of the flexible screen, multiple first and second tensioning mechanisms must be adjusted simultaneously to allow the flexible screen to be extended along both the long and short sides of the rectangular frame. However, adjusting the flatness of the flexible screen using these multiple first and second tensioning mechanisms is complex, resulting in low assembly efficiency for the projection screen. Summary of the Invention

[0005] The present invention provides a projection screen that can solve the problems of the prior art in terms of the complicated flatness adjustment process and low assembly efficiency of projection screens. The technical solution is as follows:

[0006] A projection screen is provided, comprising:

[0007] A plurality of support frames, wherein the ends of every two adjacent support frames are movably connected, and the plurality of support frames can be surrounded by a rectangular frame;

[0008] A curtain piece connected to the rectangular frame;

[0009] A tensioning mechanism, the tensioning mechanism being located on the back of the screen piece and connected to at least one set of two oppositely disposed supporting frames in the rectangular frame;

[0010] Wherein, the tensioning mechanism is configured to adjust the tension of the screen piece by driving the two oppositely arranged supporting frames to move toward each other.

[0011] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0012] A projection screen includes: a plurality of support frames, a screen sheet, and a tensioning mechanism. When the screen sheet is secured to a rectangular frame, the tensioning mechanism can be secured to the back of the screen sheet. The tensioning mechanism located on the back of the screen sheet can then be used to adjust the tension of the screen sheet in the short direction and / or the long direction of the rectangular frame. Because the tensioning mechanism is connected to at least one set of two opposing support frames in the rectangular frame, the tensioning mechanism can drive the two opposing support frames to move toward each other. Therefore, the tensioning mechanism can stretch the screen sheet in the short direction and / or the long direction of the rectangular frame. This effectively simplifies the process of adjusting the flatness of the screen sheet, thereby effectively improving the assembly efficiency of the projection screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 This is a schematic structural diagram of a projection screen provided by an embodiment of the present application;

[0015] Figure 2 yes Figure 1 An exploded view of the projection screen is shown;

[0016] Figure 3 This is a schematic structural diagram of a corner block provided in an embodiment of the present application;

[0017] Figure 4 This is a schematic diagram of the connection between a support frame and a corner block provided in an embodiment of the present application;

[0018] Figure 5 This is a structural diagram of a tensioning mechanism provided in an embodiment of the present application;

[0019] Figure 6 yes Figure 5 An exploded view of the tensioning mechanism is shown;

[0020] Figure 7 This is a rendering of the embodiment of the present application using a tensioning mechanism to tension the curtain sheet;

[0021] Figure 8This is a structural diagram of a rotating connection provided by an embodiment of the present application;

[0022] Figure 9 yes Figure 8 An exploded view of the rotating connection is shown;

[0023] Figure 10 is a structural schematic diagram of another rotating connection member provided in an embodiment of the present application;

[0024] Figure 11 This is a schematic diagram of the connection between a limiting member and a rotating connecting member provided in an embodiment of the present application;

[0025] Figure 12 This is a schematic diagram of another connection between a position limiting member and a rotating connecting member provided in an embodiment of the present application;

[0026] Figure 13 This is a schematic diagram of a connection between a tensioning member and a rotating connecting member provided in an embodiment of the present application;

[0027] Figure 14 yes Figure 13 A cross-sectional view of the tensioning member shown in FIG;

[0028] Figure 15 Schematic diagram of the connection between the tensioning member and the sub-support rod shown in an embodiment of the present application;

[0029] Figure 16 yes Figure 15 A local enlarged schematic diagram at A';

[0030] Figure 17 yes Figure 14 A schematic structural diagram of the tensioning member is shown;

[0031] Figure 18 yes Figure 17 A side view of the tensioner is shown;

[0032] Figure 19 This is a schematic diagram of another connection between a tensioning member and a sub-support rod provided in an embodiment of the present application;

[0033] Figure 20 yes Figure 19 A local enlarged schematic diagram at B';

[0034] Figure 21 This is a schematic structural diagram of another projection screen provided in an embodiment of the present application;

[0035] Figure 22 This is a schematic diagram of the connection between a tensioning mechanism and a supporting frame provided in an embodiment of the present application.

[0036] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0038] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a projection screen provided in an embodiment of the present application. Figure 2 yes Figure 1 The projection screen 000 may include: a plurality of support frames 100 , screen sheets 200 and a tensioning mechanism 300 .

[0039] The screen 200 in the projection screen 000 can be connected to the rectangular frame, that is, the screen 200 can be connected to the side of the support frame 100. In the present application, the screen 200 can be connected to the rectangular frame by bonding or screwing, which is not limited in the present embodiment.

[0040] The tensioning mechanism 300 in the projection screen 000 can be located on the back of the screen 200, and the tensioning mechanism 300 can be connected to at least one set of two opposing support frames 100 in the rectangular frame. For example, the two opposing support frames 100 can be two long frames 100a or two short frames 100b.

[0041] In the present application, the screen piece 200 is connected to the rectangular frame. When the tensioning mechanism 300 is connected to the two oppositely arranged long frames 100a, the tensioning mechanism 300 can be used to drive the two oppositely arranged long frames 100a to move toward each other, so that the two oppositely moving long frames 100a can drive the screen piece 200 to move in the short side direction of the rectangular frame (that is, the length direction of the short frame 100b), thereby adjusting the tension of the screen piece 200 in the direction parallel to the short side of the rectangular frame.

[0042] When the tensioning mechanism 300 is connected to the oppositely disposed short frames 100 b, the tensioning mechanism 300 can be used to drive the two oppositely disposed short frames 100 b to move toward each other, so that the two oppositely moving short frames 100 b can drive the screen piece 200 to move in the long side direction of the rectangular frame (that is, the length direction of the long frame 100 a), thereby adjusting the tension of the screen piece 200 in the direction parallel to the long side of the rectangular frame.

[0043] When the tensioning mechanism 300 is simultaneously connected to the oppositely arranged long frames 100a and the oppositely arranged short frames 100b, the tensioning mechanism 300 can be used to drive the two oppositely arranged long frames 100a to move toward each other, so that the two oppositely moving long frames 100a can drive the screen piece 200 to move in the short side direction of the rectangular frame (that is, the length direction of the short frame 100b), thereby adjusting the tension of the screen piece 200 in the direction parallel to the short side of the rectangular frame; it can also be used to drive the two oppositely arranged short frames 100b to move toward each other, so that the two oppositely moving short frames 100b can drive the screen piece 200 to move in the long side direction of the rectangular frame (that is, the length direction of the long frame 100a), thereby adjusting the tension of the screen piece 200 in the direction parallel to the long side of the rectangular frame.

[0044] For example, when the rectangular frame is fixed to the back of the screen 200, the tensioning mechanism 300 can be fixed to the back of the screen 200. The tensioning mechanism 300 located on the back of the screen 200 can then adjust the tension of the screen 200 in the short direction and / or the long direction of the rectangular frame. Because the tensioning mechanism 300 is connected to at least one set of two opposing support frames 100 in the rectangular frame, the tensioning mechanism 300 can drive the two opposing support frames 100 to move toward each other. Therefore, the tensioning mechanism 300 can stretch the screen 200 in the short direction and / or the long direction of the rectangular frame. This effectively simplifies the process of adjusting the flatness of the screen 200, thereby effectively improving the assembly efficiency of the projection screen 000.

[0045] In summary, embodiments of the present application provide a projection screen comprising: a plurality of support frames, a screen sheet, and a tensioning mechanism. When the screen sheet is secured to a rectangular frame, the tensioning mechanism can be secured to the back of the screen sheet. The tensioning mechanism located on the back of the screen sheet can then be used to adjust the tension of the screen sheet in the short direction of the rectangular frame and / or in the long direction of the rectangular frame. Because the tensioning mechanism is connected to at least one set of two opposing support frames in the rectangular frame, the tensioning mechanism can drive the two opposing support frames to move toward each other. Therefore, the tensioning mechanism can stretch the screen sheet in the short direction of the rectangular frame and / or in the long direction of the rectangular frame. This effectively simplifies the process of adjusting the flatness of the screen sheet, thereby effectively improving the assembly efficiency of the projection screen.

[0046] Optional, please refer to Figure 3 , Figure 3: is a schematic structural diagram of a corner block provided in an embodiment of the present application. The projection screen 000 may further include: a plurality of corner blocks 400, wherein a corner block 400 may be provided between every two adjacent support frames 100 in the plurality of support frames 100. For example, the number of the plurality of support frames 100 in the projection screen 000 may be four, and the number of the plurality of corner blocks 400 may also be four, wherein the ends of two adjacent support frames 100 in the four support frames 100 are connected by a corner block 400. In this way, the four support frames 100 and the four corner blocks 400 may form a rectangular frame. In the present application, the corner block 400 in the projection screen 000 may include: two interconnected connecting portions 401, wherein the two connecting portions 401 may correspond one-to-one to two adjacent support frames 100. Each of the two connecting portions 401 may have a receiving groove 4011 for accommodating the end of the corresponding support frame 100, and a second guide groove 4012 connected to the receiving groove 4011. It should be noted that the length direction of the second guide groove 4012 on each connecting portion 401 is parallel to the length direction of the supporting frame 100 corresponding to the connecting portion 401. Figure 4 , Figure 4 It is a schematic diagram of the connection between a support frame and a corner block provided in an embodiment of the present application. The projection screen 000 may also include: a second guide member A1, wherein, after the end of the support frame 100 is located in the receiving groove 4011 of the corresponding connecting portion 401, the second guide member A1 can pass through the second guide groove 4012 and be fixedly connected to the support frame 100. In this case, connecting the corner block 400 to the support frame 100 through the second guide member A1 can prevent the corner block 400 from falling off the support frame 100. In addition, since two adjacent support frames 100 are connected by the corner block 400, the angle between the two adjacent support frames 100 is defined by the corner block 400, thereby ensuring the regularity of the formed rectangular frame and avoiding the problem of sharp corners at the corners of the rectangular frame.

[0047] For example, when the tensioning mechanism 300 is used to adjust the tension of the screen sheet 200 in the short direction of the rectangular frame and in the long direction of the rectangular frame, because the tensioning mechanism 300 is connected to the two opposing support frames 100, the second guide member A1 can slide within the second guide groove 4012 along the length direction of the second guide groove 4012. Therefore, the two opposing support frames 100 can move toward each other to stretch the screen sheet 200 in a direction perpendicular to the support frames 100.

[0048] In the examples of this application, please refer to Figure 3The corner block 400 can be a right-angle corner block. The two connecting parts 401 of the right-angle corner block 400 have a receiving groove 4011, and the end of the supporting frame 100 is inserted into the receiving groove 4011. Therefore, after the corner block 400 is connected to the two adjacent supporting frames 100, it can be ensured that the angle formed by the two adjacent supporting frames 100 is a right angle, so as to further ensure the regularity of the formed rectangular frame.

[0049] For example, after the parts of the projection screen 000 are brought into the home, first, the corners of the screen 200 are fixed to the corner blocks 400; then, the two ends of the supporting frame 100 are respectively connected to the corresponding corner blocks 400; then, the tensioning mechanism 300 is connected to the supporting frame 100 in the rectangular frame. At this time, the tensioning mechanism 300 can drive the two relatively arranged supporting frames 100 to move toward each other, thereby tensioning the screen 200 to ensure the flatness of the screen 200.

[0050] Optionally, the receiving groove 4011 in the connecting portion 401 may have a first notch a1 facing one side of the supporting frame, and a second notch a2 facing the screen panel 200. The depth of the receiving groove 4011 in a direction perpendicular to the second notch a2 may be equal to the thickness of the supporting frame 100. In this way, after the end of the supporting frame 100 is positioned within the receiving groove 4011, the surface of the supporting frame 100 facing the screen panel 200 and the surface of the corner block 400 facing the screen panel 200 become coplanar, resulting in a more flat surface on the surface of the rectangular frame facing the screen panel 200, thereby improving the flatness of the screen panel 200 bonded to the rectangular frame.

[0051] In the examples of this application, please refer to Figure 5 and Figure 6 , Figure 5 This is a structural diagram of a tensioning mechanism provided in an embodiment of the present application. Figure 6 yes Figure 5 The tensioning mechanism 300 in the projection screen 000 may include: a fixing member 301, at least two support rods 302, and a plurality of rotating connecting members 303. The at least two support rods 302 correspond to at least one set of two opposing support frames 100, and the two ends of each support rod 302 are connected to the fixing member 301 and the corresponding support frame 100 via a rotating connecting member 303. Figure 7 , Figure 7 The diagram is a rendering of the embodiment of the present application using a tensioning mechanism to tension the screen. The fixing member 301 can be configured to: when moving toward the screen 200, the rotating connecting member 303 and the support rod 302 drive the two opposing support frames 100 to move toward each other.

[0052] In the present application, the number of the at least two support rods 302 can be four, and accordingly, the number of the plurality of rotating connectors 303 can be eight. One end of the four support rods 302 is rotatably connected to the four support frames 100 via the rotating connectors 303, and the other end of the four support rods 302 is rotatably connected to the fixed member 301 via the rotating connectors 303. In this way, when the fixed member 301 is subjected to a force and moves toward the screen piece 200, the support rods 302 can first rotate relative to the rotating connectors 303; then, the support rods 302 drive the two opposing support frames 100 to move toward each other; thereafter, the support frames 100 can drive the edges of the screen piece 200 to move toward each other, thereby achieving tensioning of the screen piece 200 by the tensioning mechanism 300 in the short and long directions of the rectangular frame.

[0053] In the examples of this application, please refer to Figure 8 and Figure 9 , Figure 8 is a structural diagram of a rotating connection provided in an embodiment of the present application, Figure 9 yes Figure 8 An exploded view of a rotating connector is shown. The rotating connector 303 in the tensioning mechanism 300 may include a connector body 3031 and a rotating body 3032. The connector body 3031 is fixedly connected to the support frame 100 or the fixing member 301, and the end of the support rod 302 is rotatably connected to the connector body 3031 via the rotating body 3032. For example, when the fixing member 301 moves toward the screen piece 200, the rotating body 3032 can rotate relative to the connector body 3031, so that the connector body 3031 can drive the two oppositely arranged support frames 100 to move toward each other, thereby causing the support frames 100 to drive the edges of the screen piece 200 to move toward each other, so as to adjust the flatness of the screen piece 200 in the long side direction of the rectangular frame and the flatness of the screen piece 200 in the short side direction of the rectangular frame.

[0054] In one embodiment, the rotating body 3032 may be a rotating shaft connected to the connector body 3031 , the end of the support rod 302 may be connected to the rotating shaft, and the support rod 302 may be able to rotate around the rotating shaft.

[0055] In another embodiment, the rotating body 3032 may include: an adapter 3032a, a first pin 3032b, a second pin 3032c, a first stopper 3032d, and a second stopper 3032e. The following embodiments are schematically described using the example of the rotating body 3032 including the adapter 3032a, the first pin 3032b, the second pin 3032c, the first stopper 3032d, and the second stopper 3032e.

[0056] Please refer to Figure 9 and Figure 10, Figure 10 This is a schematic diagram of the structure of another rotating connector provided in an embodiment of the present application. One end of the adapter 3032a is rotatably connected to the connector body 3031 via a first pin 3032b, and the other end of the adapter 3032a is fixedly connected to the end of the support rod 302 via a second pin 3032c. A first limiter 3032d is connected to the adapter 3032a, and a second limiter 3032e is connected to the connector body 3031. The first limiter 3032d can be configured to cooperate with the second limiter 3032e to limit the relative movement between the adapter 3032a and the connector body 3031 when the adapter 3032a rotates about the first pin 3032b to a specified position. This ensures the flatness of the projection screen 000 when it is flattened.

[0057] In the embodiment of the present application, when the adapter 3032a is rotated to a specified position around the first pin 3032b by the first limiting member 3032d and the second limiting member 3032e, the adapter 3032a and the connector body 3031 can be stably connected in various ways. The embodiment of the present application will be schematically described in the following three ways:

[0058] For the first optional implementation, please refer to Figure 10 , one of the first limiting member 3032d and the second limiting member 3032e may include: a limiting cylinder b2, a limiting ball b3 and a compression spring (not shown in the figure). The other of the first limiting member 3032d and the second limiting member 3032e may include: a limiting hole b1. Among them, the compression spring can be fixed in the limiting cylinder b2, part of the limiting ball b3 is located in the limiting cylinder b2, and the other part is located outside the limiting cylinder b2, and the limiting ball b3 is connected to the end of the compression spring. When the adapter 3032a rotates to a specified position around the first pin 3032b, the limiting hole b1 is connected to the limiting cylinder b2, so that part of the limiting ball b3 can be located in the limiting hole b1 to limit the relative movement between the adapter 3032a and the connector body 3031. In the present application, the first limiting member 3032d may include: a limiting cylinder b2, a limiting ball b3 and a compression spring. The second limiting member 3032e may include a limiting hole b1; alternatively, the first limiting member 3032d may include a limiting hole b1, and the second limiting member 3032e may include a limiting cylinder b2, a limiting ball b3, and a compression spring. This embodiment of the present application is not limited to this. It should be noted that the following embodiments are all illustrative examples of the first limiting member 3032d including the limiting hole b1, and the second limiting member 3032e including the limiting cylinder b2, the limiting ball b3, and the compression spring.

[0059] For example, when the tensioning mechanism 300 is used to extend the curtain 200, the fixing member 301 moves toward the curtain 200, and the adapter 3032a rotates about the first pin 3032b to a predetermined position, namely, until the limiting cylinder b2 is connected to the limiting hole b1. The limiting ball b3 then pops out under the elastic force of the compression spring, positioning a portion of the limiting ball b3 within the limiting hole b1. This achieves the limiting position of the adapter 3032a and the connector body 3031.

[0060] For the second possible method, please refer to Figure 11 , Figure 11 The figure is a schematic diagram of a connection between a limiting member and a rotating connector provided in an embodiment of the present application. One of the first limiting member 3032d and the second limiting member 3032e includes a limiting screw c1, and the other of the first limiting member 3032d and the second limiting member 3032e includes a threaded hole. It should be noted that the threaded hole can be a limiting hole b1, and the limiting screw c1 has external threads. The limiting screw c1 can be disposed within a limiting cylinder b2. When the adapter 3032a rotates about the first pin 3032b to a specified position, that is, when the limiting cylinder b2 is connected to the limiting hole b1, a portion of the limiting screw c1 can be located within the limiting hole b1 to limit the relative movement between the adapter 3032a and the connector body 3031. In the present application, the first limiting member 3032d can be the limiting screw c1, and the second limiting member 3032e can be a threaded hole; alternatively, the first limiting member 3032d can be a threaded hole, and the second limiting member 3032e can be a limiting screw. It should be noted that the following embodiments are all illustrated using the example of the second limiting member 3032e being a limiting screw and the first limiting member 3032d being a threaded hole. For example, during the process of extending the curtain 200 using the tensioning mechanism 300, the fixing member 301 moves toward the curtain 200, and the adapter 3032a is able to rotate about the first pin 3032b to a specified position, namely, until the limiting cylinder b2 is connected to the limiting hole b1. The operator can then rotate the limiting screw c1, which moves through the threaded engagement, positioning a portion of the limiting screw c1 within the limiting hole b1. This achieves positional restraint between the adapter 3032a and the connector body 3031.

[0061] For the third possible way, please refer to Figure 12 , Figure 12This is a schematic diagram of another embodiment of the present application showing the connection between a limiting member and a rotating connector. The first limiting member 3032d and the second limiting member 3032e can both be strong magnets d1. The two strong magnets d1 can be located in the limiting barrel b2 and the limiting hole b1, respectively. The polarity of the strong magnet d1 located in the limiting barrel b2 near the opening of the limiting barrel b2 is opposite to the polarity of the strong magnet d1 located in the limiting hole b1 near the opening. When the adapter 3032a rotates around the first pin 3032b to a specified position, that is, when the limiting barrel b2 is connected to the limiting hole b1, the two oppositely polarized sides of the two strong magnets d1 are connected by magnetic force to limit the relative movement between the adapter 3032a and the connector body 3031. For example, when the tensioning mechanism 300 is used to extend the curtain 200, the fixing member 301 moves toward the curtain 200, and the adapter 3032a rotates about the first pin 3032b to a predetermined position, namely, until the limiting cylinder b2 is connected to the limiting hole b1. The two oppositely polarized sides of the two strong magnets d1 are brought together and magnetically connected. This achieves the desired positional alignment between the adapter 3032a and the connector body 401.

[0062] Please note that, please refer to Figure 7 After the tensioning mechanism 300 tensions the screen 200, the distance between the sides of the two opposing support frames 100 facing away from the fixing member 301 is greater than the width of the screen 200 when it is not tensioned. Specifically, the distance between the sides of the opposing long frames 100a facing away from the fixing member 301 is greater than the width of the screen 200 in the short direction of the rectangular frame when it is not tensioned; and the distance between the sides of the opposing short frames 100b facing away from the fixing member 301 is greater than the width of the screen 200 in the long direction of the rectangular frame when it is not tensioned. Thus, when the tensioning mechanism 300 is mounted on the back of the screen 200, it is in an arched state. When a force is applied to the fixing member 301, causing it to move toward the screen 200, the tensioning mechanism 300 drives the long and short frames 100a, 100b to move away from the fixing member 301, thereby tensioning the screen 200. However, the screen piece 200 is prone to fatigue deformation after long-term use, or when the manufacturing precision of the screen piece 200 is low, an auxiliary tensioning member needs to be provided for tensioning.

[0063] Optionally, the projection screen 000 further includes a tensioning member 304. The tensioning member 304 can be configured to adjust the tension of the screen 200 by driving the support frame 100 away from the fixing member 301. The tensioning member 304 can assist in tensioning the screen 200. In the present embodiment, there are two possible configurations for the tensioning member 304, which are schematically illustrated below:

[0064] For the first possible case, please refer to Figure 13 and Figure 14 , Figure 13 This is a schematic diagram of a connection between a tensioning member and a rotating connecting member provided in an embodiment of the present application. Figure 14 yes Figure 13 A cross-sectional view of the tensioning member is shown in FIG. A tensioning member 304 may be provided between the support rod 302 and the rotating connector 303 in the tensioning mechanism 300. One end of the tensioning member 304 may be rotatably connected to the rotating connector 303, and the other end of the tensioning member 304 may be fixedly connected to the end of the support rod 302. For example, the tensioning member 304 may be provided between the adapter 3032a and the support rod 302. The tensioning member 304 may drive the support frame 100 to move away from the fixing member 301 via the rotating connector 303, thereby causing the support frame 100 to drive the edge of the screen piece 200 to move away from the fixing member 301, thereby adjusting the tension of the screen piece 200.

[0065] For the second possible situation, please refer to Figure 15 and Figure 16 , Figure 15 is a schematic diagram of the connection between the tensioning member and the sub-support rod shown in an embodiment of the present application, Figure 16 yes Figure 15 A partial enlarged schematic diagram at point A'. The support rod 302 in the tensioning mechanism 300 can have two sub-support rods 3021, with a tensioning member 304 positioned between the two sub-support rods 3021. The ends of the tensioning member 304 are fixedly connected to the ends of the two sub-support rods 3021. For example, the tensioning member 304 can drive the support frame 100 to move away from the fixing member 301 via the sub-support rods 3021 connected to the support frame 100, thereby causing the support frame 100 to drive the edge of the screen piece 200 to move away from the fixing member 301, thereby adjusting the tension of the screen piece 200.

[0066] In the embodiment of the present application, there are various structures of the tensioning member 304 in the above two possible situations. The embodiment of the present application uses the following two optional implementations as examples for schematic illustration:

[0067] For the first optional implementation, please refer to Figure 14 、 Figure 17 and Figure 18 , Figure 17 yes Figure 14 The schematic diagram of the structure of the tensioning member is shown. Figure 18 yes Figure 17A side view of the tensioning member is shown. The tensioning member 304 in the projection screen 000 may include a first support member 3041, a second support member 3042, and an elastic element 3043. The elastic element 3043 may be located between the first support member 3041 and the second support member 3042. The first support member 3041 may be movably connected to the second support member 3042 via the elastic element 3043. In the present application, the first support member 3041 may have a first protrusion e1 on the side proximate to the second support member 3042, and the second support member 3042 may have a second protrusion e2 on the side proximate to the first support member 3041. The elastic element 3043 between the first support member 3041 and the second support member 3042 may be a compression spring, which may be sleeved onto the first protrusion e1 and the second protrusion e2. This allows the compression spring to move only in a direction parallel to the support frame 100 and is less likely to wobble in a direction perpendicular to the support frame 100. In this way, the connection stability between the first support member 3041 and the second support member 3042 can be improved. In the present application, the elastic element between the first support member 3041 and the second support member 3042 can also be a spring, and the embodiment of the present application does not limit the structural form of the elastic element 3043.

[0068] For the second optional implementation, please refer to Figure 19 and Figure 20 , Figure 19 This is a schematic diagram of another connection between a tensioning member and a sub-support rod provided in an embodiment of the present application. Figure 20 yes Figure 19 A partial enlarged schematic diagram at B'. The tensioning member 304 in the projection screen 000 may include: a first support member 3041, a second support member 3042, and a magnetic element 3044. The magnetic element 3044 may be located between the first support member 3041 and the second support member 3042. The first support member 3041 may be movably connected to the second support member 3042 via the magnetic element 3044. In the present application, the magnetic element 3044 may include two magnets with an N pole and an S pole, respectively. One end of one of the two magnets is connected to the first support member 3041, and one end of the other magnet is connected to the second support member 3042, and the polarities of the two magnets are opposite when they are close to each other. In this way, the connection stability of the first support member 3041 and the second support member 3042 can be improved.

[0069] In the examples of this application, please refer to Figure 14 and Figure 20The first support member 3041 in the tensioning member 304 may have a groove e3 at one end facing the second support member 3042, and the sidewall of the first support member 3041 may have a first guide groove e4 connected to the groove e3. The projection screen 000 may also include a first guide member B1. After at least a portion of the second support member 3042 is positioned within the groove e3, the first guide member B1 may pass through the first guide groove e4 and be fixedly connected to the second support member 3042. For example, when the first support member 3041 and the second support member 3042 move toward each other under the action of the elastic element 3043 or the magnetic element 3044, the groove e3 on the sidewall of the first support member 3041 allows the first guide member B1 to pass through the first guide groove e4 and be fixedly connected to the second support member 3042. Therefore, the first support member 3041 and the second support member 3042 can be further prevented from shaking in a direction perpendicular to the support frame 100 , thereby improving the connection stability of the first support member 3041 and the second support member 3042 .

[0070] Optional, please refer to Figure 21 , Figure 21 : is a schematic structural diagram of another projection screen provided in an embodiment of the present application. The projection screen 000 may further include: a suspension member 500, which may be fixedly connected to the fixing member 301 in the tensioning mechanism 300 and the reference plane, respectively, so as to achieve the purpose of suspending the projection screen 000 on the reference plane. The reference plane may be a plane in a wall or other supporting object connected to the suspension member. Thus, for example, the suspension member 500 may include: a fastening screw, an adhesive film, or a magnet. For example, when the suspension member is an adhesive film, one side of the adhesive film is connected to the side of the fixing member 301 away from the screen piece 200, and the other side of the adhesive film is connected to the reference plane, so as to achieve the purpose of suspending the projection screen 000 on the reference plane.

[0071] In the examples of this application, please refer to Figure 22 , Figure 22 This is a schematic diagram of the connection between a tensioning mechanism and a support frame provided in an embodiment of the present application. The at least two support rods 302 in the tensioning mechanism 300 include two first support rods 3022 and two second support rods 3023. The lengths of the two first support rods 3022 are parallel to the long sides of the rectangular frame, while the lengths of the two second support rods 3023 are parallel to the short sides of the rectangular frame. Furthermore, the two first support rods 3022 and the two second support rods 3023 are identical in length. This ensures that the tensioning mechanism 300 maintains consistent tension on the screen 200 in both the long and short sides of the rectangular frame, thereby improving the flatness of the screen 200.

[0072] Optionally, the screen 200 can also be an optical screen, with its edges connected to the sides of the support frame 100 and its corners connected to the sides of the corner blocks 400. The optical screen includes a micromirror reflective structure that reflects light emitted by the laser projection device in a specific direction. This ensures that the light reflected by the micromirror reflective structure reaches the user's eyes to the greatest extent possible, allowing the user to view a clearer image. For example, the optical screen may include a circular Fresnel optical film, a black screen, or a white plastic screen.

[0073] In embodiments of the present application, a flexible screen can also be used to display projected images. The flexible screen can include a screen sheet and a flexible carrier (not shown). The screen sheet can be fixed to one side of the flexible carrier, with the edge of the flexible carrier extending beyond the four side edges of the screen sheet. The other side of the flexible carrier can be attached to a rectangular frame. The screen sheet can be an optical film, which is used in conjunction with a projection host. The projection host is configured to emit a light beam to the optical film, which is configured to receive and reflect the light beam to display the image. The screen sheet can be fixed to the flexible carrier by adhesive bonding. For example, the flexible carrier can be a flexible cloth, or other flexible material, as long as it can be bent arbitrarily and maintains a certain degree of flatness when stretched. This is not limited in embodiments of the present application. It should be noted that the projection of the flexible carrier onto the plane of the screen sheet covers the screen sheet or its four side edges, ensuring that the edge of the flexible carrier extends beyond the four side edges of the screen sheet. This ensures that the flatness of the screen sheet can be maintained while the flexible carrier is stretched.

[0074] In combination with the above embodiments, the assembly method of the projection screen 000 provided in the embodiment of the present application is as follows:

[0075] After the components of the projection screen 000 are brought into the home, first, the ends of the support frame 100 are connected to the corner blocks 400 to form a rectangular frame;

[0076] Then, the corner of the screen piece 200 is bonded to the side of the corner block 400 by adhesive film;

[0077] Afterwards, the edge of the screen piece 200 is connected to the side of the support frame 100 to fix the rectangular frame to the back of the screen piece 200;

[0078] Afterwards, the tensioning mechanism 300 is connected to the supporting frame 100 in the rectangular frame;

[0079] Finally, the tensioning mechanism 300 is flattened to achieve tensioning of the curtain piece 200 .

[0080] In summary, embodiments of the present application provide a projection screen comprising: a plurality of corner blocks, a plurality of support frames, a screen, and a tensioning mechanism. When the screen is secured to a rectangular frame, the tensioning mechanism can be secured to the back of the screen. The tensioning mechanism located on the back of the screen can then be used to adjust the tension of the screen in the short direction and / or the long direction of the rectangular frame. Because the tensioning mechanism is connected to at least one set of two opposing support frames in the rectangular frame, the tensioning mechanism can drive the two opposing support frames to move toward each other. Therefore, the tensioning mechanism can stretch the screen in the short direction and / or the long direction of the rectangular frame. This effectively simplifies the process of adjusting the flatness of the screen, thereby effectively improving the assembly efficiency of the projection screen.

[0081] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0082] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A projection screen, characterized in that: include: Four supporting frames, where the ends of every two adjacent supporting frames are movably connected, and the four supporting frames can form a rectangular frame; The four supporting frames include: two long frames arranged opposite to each other and two short frames arranged opposite to each other; A curtain piece connected to the rectangular frame; A tensioning mechanism, the tensioning mechanism being located on the back of the screen piece and connected to the two long frames and the two short frames in the rectangular frame; The tensioning mechanism is configured to adjust the tension of the screen piece by driving the two oppositely arranged support frames to move toward each other; Wherein, the tensioning mechanism comprises: a fixing member, four support rods and a plurality of rotating connecting members; The four support rods correspond to the four support frames one by one, and both ends of each support rod are connected to the fixing member and the corresponding support frame through the rotating connecting member; Wherein, the fixing member is configured to: when moving toward the screen piece, drive the two long frames and the two short frames that are arranged opposite to each other to move toward each other through the rotating connecting member and the supporting rod.

2. The projection screen according to claim 1, wherein The rotating connecting member comprises: a connecting member body and a rotating body; Wherein, the connecting member body is fixedly connected to the supporting frame or the fixing member, and the end of the supporting rod is rotatably connected to the connecting member body through the rotating body.

3. The projection screen according to claim 2, characterized in that The rotating body includes: a connecting member, a first pin shaft, a second pin shaft, a first limiting member and a second limiting member; Wherein, one end of the adapter is rotatably connected to the connector body through the first pin shaft, and the other end of the adapter is fixedly connected to the end of the support rod through the second pin shaft; The first limiting member is connected to the adapter, and the second limiting member is connected to the connector body. The first limiting member is configured to cooperate with the second limiting member when the adapter rotates to a specified position around the first pin shaft.

4. The projection screen according to claim 3, characterized in that One of the first limiting member and the second limiting member includes: a limiting cylinder, a limiting ball and a compression spring, and the other of the first limiting member and the second limiting member includes: a limiting hole; The compression spring is fixed in the limiting cylinder, the limiting ball is partially located in the limiting cylinder and partially located outside the limiting cylinder, and the limiting ball is connected to the end of the compression spring; When the adapter rotates around the first pin to a specified position, the limiting hole is communicated with the limiting cylinder, and a portion of the limiting sphere is located in the limiting hole.

5. The projection screen according to claim 1, wherein: A tensioning member is provided between the support rod and the rotating connecting member, one end of the tensioning member is rotatably connected to the rotating connecting member, and the other end of the tensioning member is fixedly connected to the end of the support rod; Alternatively, the support rod has two sub-support rods, a tensioning member is provided between the two sub-support rods, and both ends of the tensioning member are respectively fixedly connected to the ends of the two sub-support rods; The tensioning member is configured to adjust the tension of the screen piece by driving the supporting frame to move in a direction away from the fixing member.

6. The projection screen according to claim 5, characterized in that The tensioning member includes: a first support member, a second support member, and an elastic element located between the first support member and the second support member, and the first support member is movably connected to the second support member through the elastic element.

7. The projection screen according to claim 6, characterized in that One end of the first support member facing the second support member has a groove, and the side wall of the first support member has a first guide groove communicating with the groove; The projection screen further includes a first guide member, wherein after at least a portion of the second support member is located in the groove, the first guide member passes through the first guide slot and is fixedly connected to the second support member.

8. The projection screen according to any one of claims 1 to 7, characterized in that: The projection screen further comprises: four corner blocks, wherein one corner block is provided between every two adjacent support frames of the four support frames; The corner block includes two interconnected connecting portions, the two connecting portions corresponding to the two adjacent supporting frames one by one, and each connecting portion having a receiving groove for receiving an end portion of the corresponding supporting frame, and a second guide groove communicating with the receiving groove; The projection screen further includes a second guide member, wherein after the end of the supporting frame is located in the receiving groove of the corresponding connecting portion, the second guide member passes through the second guide groove and is fixedly connected to the supporting frame.

9. The projection screen according to claim 8, characterized in that The receiving groove has a first notch facing one side of the supporting frame and a second notch facing the screen piece. The depth of the receiving groove in a direction perpendicular to the second notch is equal to the thickness of the supporting frame.

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