Support structure and projection device

By designing an adjustable structure on the projector bracket, the screen support rod can be rotated and its angle adjusted within the receiving slot, solving the problem of the fixed and unadjustable screen angle and improving the projection effect and ease of use.

CN224352670UActive Publication Date: 2026-06-12BIWIN STORAGE TECH CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
BIWIN STORAGE TECH CO LTD
Filing Date
2025-06-18
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

In existing projector bracket designs, the installation angle of the screen is fixed and cannot be adjusted according to actual usage needs, which affects the projection effect and usage flexibility.

Method used

A support structure was designed, including a mounting rod, a screen support rod, and an adjustment structure. The projection angle of the screen can be flexibly adjusted through the adjustment structure, which includes an adjustment element and a limiting block, allowing the screen support rod to rotate and adjust its angle within the receiving groove.

Benefits of technology

It enables flexible adjustment of the screen angle, improves the projection effect and ease of use, and enhances the projection viewing experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model provides a support structure and projection device, relating to the field of projection device technology. The support structure includes a mounting rod, a screen support rod, and an adjustment structure. The mounting rod has a receiving groove on its surface. The screen support rod connects to the screen and, when separated from the screen, resides within the receiving groove. The adjustment structure is installed within the receiving groove and connected to the screen support rod. The adjustment structure adjusts the support angle of the screen support rod to adjust the projection angle of the screen. When the screen support rod is connected to the screen, it leaves the receiving groove and rotates relative to it. The adjustment structure within the receiving groove can adjust the angle of the screen support rod relative to the mounting rod, thereby adjusting the projection angle of the screen. Even after the support structure is installed and fixed, the projection angle of the screen can be adjusted using the adjustment structure, making it more flexible and improving the projection effect.
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Description

Technical Field

[0001] This utility model relates to the field of projection equipment technology, and more specifically, to a support structure and a projection device. Background Technology

[0002] Currently, projection technology is widely used in e-sports entertainment, education, and home entertainment. Especially in e-sports, the large screen display, flexible projection, and high dynamic range of projectors meet the demands of an immersive e-sports experience. The core component, the projector, typically needs to be used in conjunction with a screen to achieve optimal display results. In practical applications, we integrate the projector and screen on a dedicated projector stand to improve ease of use and space utilization. This integrated installation not only simplifies the deployment process but also helps maintain a clean and aesthetically pleasing projection environment. However, existing projector stand designs have limitations regarding the screen's installation angle. Specifically, once the screen is mounted on the stand, its angle is fixed and cannot be adjusted according to actual usage needs. This design restricts users from optimizing the projection effect in different scenarios; for example, when lighting conditions change or the viewer's position shifts, the visibility and viewing experience cannot be improved by adjusting the screen angle.

[0003] Therefore, the inability to adjust the screen angle has become an important factor affecting the flexibility and effectiveness of projection systems. Utility Model Content

[0004] This utility model provides a support structure and projection device that can flexibly adjust the final projection angle of the screen, thereby improving the projection effect and further enhancing the projection viewing experience.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a support structure, which includes:

[0007] Mounting rod, the surface of which is provided with a receiving groove;

[0008] A curtain support rod, which is used to connect the curtain;

[0009] An adjustment structure is installed in the receiving groove and connected to the screen support rod. The adjustment structure is used to adjust the support angle of the screen support rod to adjust the projection angle of the screen.

[0010] Optionally, the adjustment structure includes an adjustment member and a plurality of limiting blocks. The adjustment member and the curtain support rod are movably connected. The plurality of limiting blocks are installed at intervals in the receiving groove along the length direction of the mounting rod. The adjustment member engages with the plurality of limiting blocks respectively to adjust the angle of the curtain support rod.

[0011] Optionally, there are two limiting blocks, namely a first limiting block and a second limiting block, and the adjusting member is engaged with the first limiting block and the second limiting block respectively to adjust the angle of the curtain support rod.

[0012] Optionally, the adjusting component includes a connecting rod and a limiting rod. One end of the connecting rod is connected to the limiting rod, and the other end of the connecting rod is rotatably connected to the curtain support rod. The limiting rod is engaged with the plurality of limiting blocks to adjust the angle of the curtain support rod.

[0013] Optionally, the adjustment structure further includes a base, which is installed in the receiving groove, the limiting block is installed on the base, and the adjustment member is slidably disposed on the base.

[0014] Optionally, the base is provided with a slide, the slide is oriented in the same direction as the length of the receiving groove, and the adjusting member is slidably disposed on the slide.

[0015] Optionally, the limiting block is rotatably mounted on the base. When the limiting block is rotated to the locked position, the adjusting member and the limiting block are engaged. When the limiting block is rotated to the unlocked position, the adjusting member slides along the slide rail.

[0016] Optionally, the limiting block is provided with a groove, and when the limiting block is rotated to the locking position, the adjusting member is engaged in the groove.

[0017] Optionally, the base is a hollow structure, and the limiting block is rotatably installed inside the base.

[0018] Optionally, the included angle between the adjusting member and the curtain support rod is 90°-120°.

[0019] Optionally, the bracket structure further includes a support base, which is rotatably connected to the mounting rod for supporting the mounting rod. The curtain support rod is disposed in the receiving groove when separated from the curtain.

[0020] Optionally, the support base includes a support rod and a tripod. The top end of the support rod is rotatably connected to the mounting rod, and the bottom end of the support rod is connected to the tripod, which is used to support the support rod.

[0021] Optionally, the support rod is a telescopic rod structure.

[0022] Optionally, the tripod is provided with casters at the bottom.

[0023] An embodiment of this utility model also provides a projection device, including a screen, a projector body, and a support structure, wherein the screen and the projector body are both connected to the support structure.

[0024] The beneficial effects of the support structure and projection device of this utility model embodiment include, for example:

[0025] The support structure includes a mounting rod, a screen support rod, and an adjustment mechanism. The mounting rod has a recessed groove on its surface. The screen support rod connects to the screen, and the adjustment mechanism is installed within the recessed groove. The adjustment mechanism is connected to the screen support rod and is used to adjust the support angle of the screen support rod to adjust the projection angle of the screen. In use, the recessed groove on the mounting rod allows the screen support rod to be stored separately from the screen, facilitating storage and subsequent use. When the screen support rod is connected to the screen, it moves away from the recessed groove and rotates relative to it. The adjustment mechanism within the recessed groove adjusts the angle of the screen support rod relative to the mounting rod, thereby adjusting the projection angle of the screen. Even after the support structure is fixed in place, the projection angle can still be adjusted using the adjustment mechanism, making it more flexible, improving the projection effect, and further enhancing the viewing experience.

[0026] The projection device includes a screen, a projector body, and a support structure, with both the screen and the projector body connected to the support structure. In use, the mounting rod has a receiving groove. When the screen support rod is detached from the screen, it is stored in the receiving groove for easy storage and subsequent use. When the screen support rod is connected to the screen, it leaves the receiving groove and rotates relative to it. An adjustment mechanism within the receiving groove allows adjustment of the angle of the screen support rod relative to the mounting rod, thereby adjusting the projection angle of the screen. Even after the support structure is fixed in place, the projection angle can still be adjusted using the adjustment mechanism, making it more flexible, improving the projection effect, and further enhancing the viewing experience. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the projection device provided in this embodiment in its stowed state;

[0029] Figure 2 This is a schematic diagram of the projection device provided in this embodiment in the open state;

[0030] Figure 3 This embodiment provides a structural schematic diagram of the curtain support rod and adjusting component;

[0031] Figure 4 This is a first-view structural schematic diagram of the support structure provided in this embodiment;

[0032] Figure 5 This is a schematic diagram of the support structure from a second perspective provided in this embodiment;

[0033] Figure 6 This is a third-view structural diagram of the support structure provided in this embodiment;

[0034] Figure 7 This is a schematic diagram of the structure of the limiting block provided in this embodiment.

[0035] Icons: 10-Mounting rod; 11-Receiving slot; 20-Screen support rod; 30-Adjustment structure; 31-Adjusting component; 311-Connecting rod; 312-Limiting rod; 32-Limiting block; 321-First limiting block; 322-Second limiting block; 301-Groove; 33-Base; 331-Slide rail; 40-Supporting base; 41-Supporting rod; 42-Tripod; 100-Bracket structure; 200-Projector; 1000-Projection equipment. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0041] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0042] Currently, projection technology is widely used in e-sports entertainment, education, and home entertainment. The core device, the projector, typically needs to be used in conjunction with a screen to achieve the best display effect. In practical applications, we integrate the projector and screen on a dedicated projector stand to improve ease of use and space utilization. This integrated installation method not only simplifies the deployment process but also helps maintain a clean and aesthetically pleasing projection environment. However, existing projector stand designs have limitations regarding the screen's installation angle. Specifically, once the screen is mounted on the stand, its angle is fixed and cannot be adjusted according to actual usage needs. This design limits users' ability to optimize the projection effect in different scenarios; for example, when lighting conditions change or the viewer's position is adjusted, the visibility and viewing experience cannot be improved by adjusting the screen angle.

[0043] Therefore, the inability to adjust the screen angle has become an important factor affecting the flexibility and effectiveness of projection systems.

[0044] The following describes in detail the overall structure, working principle, and technical effects of the support structure provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0045] Please refer to Figures 1-7 This embodiment provides a support structure 100 and a projection device 1000, which can effectively improve the technical problems mentioned above, and can flexibly adjust the final projection angle of the screen, thereby improving the projection effect and further enhancing the projection viewing experience.

[0046] The projection device 1000 includes a screen, a projector 200, and a support structure 100. The screen and projector 200 are both integrated into the support structure 100. The light emitted by the projector 200 can be directly projected onto the screen to form a projected image. The screen and projector 200 form an integrated structure through the support structure 100, which can be adapted to use in various scenarios, is convenient to move and disassemble, and improves the user experience.

[0047] In this embodiment, the support structure 100 includes a mounting rod 10, a screen support rod 20, and an adjustment structure 30. The surface of the mounting rod 10 is provided with a receiving groove 11. The screen support rod 20 is used to connect the screen, and the screen support rod 20 is disposed in the receiving groove 11 when separated from the screen. The adjustment structure 30 is installed in the receiving groove 11 and is connected to the screen support rod 20. The adjustment structure 30 is used to adjust the support angle of the screen support rod 20 to adjust the projection angle of the screen.

[0048] Specifically, the mounting rod 10 is a straight rod structure, with one end detachably connected to the projector 200. The screen support rod 20 is connected to the screen, and the surface of the mounting rod 10 has a receiving groove 11 along its length. When the screen support rod 20 and the screen are separated, they are stored in the receiving groove 11 for easy storage and carrying. When projection is needed, the screen support rod 20 is unscrewed from the receiving groove 11, the screen is installed on the screen support rod 20, and then the screen is unfolded for projection. The adjustment structure 30 is installed in the receiving groove 11, and the adjustment structure 30 is located at the end of the receiving groove 11 away from the projector 200. The adjustment structure 30 is connected to the screen support rod 20, and the adjustment structure 30 can adjust the support angle of the screen support rod 20, thereby adjusting the projection angle of the screen.

[0049] It should be noted that after the projector 200 and the screen are both mounted on the bracket structure 100, the projector 200 may obstruct the view during use, thus affecting the viewing experience. To solve this technical problem, the bracket structure 100 in this embodiment is equipped with an adjustment structure 30. This adjustment structure 30 is used to adjust the support angle of the screen support rod 20, thereby adjusting the projection angle of the screen and preventing obstruction of the view. Furthermore, even with the projector 200 fixed in place, the final projection angle of the screen can be adjusted using the adjustment structure 30, making it more flexible and convenient to use.

[0050] It should also be noted that the adjustment structure 30 includes an adjustment member 31 and multiple limiting blocks 32. The adjustment member 31 and the curtain support rod 20 are movably connected. The multiple limiting blocks 32 are installed at intervals in the receiving groove 11 along the length direction of the mounting rod 10. The adjustment member 31 is engaged with the multiple limiting blocks 32 respectively to adjust the angle of the curtain support rod 20.

[0051] Specifically, the adjusting component 31 includes a connecting rod 311 and a limiting rod 312. One end of the connecting rod 311 is connected to the limiting rod 312, and the other end of the connecting rod 311 is rotatably connected to the curtain support rod 20. The limiting rod 312 is engaged with multiple limiting blocks 32 to adjust the angle of the curtain support rod 20.

[0052] Please refer to Figure 3 The adjusting component 31 includes a limiting rod 312 and two connecting rods 311. The two connecting rods 311 are located on both sides of the screen support rod 20, and the same end of the two connecting rods 311 is hinged to the screen support rod 20 so that the connecting rods 311 can rotate relative to the screen support rod 20. The other end of the two connecting rods 311 extends out of the screen support rod 20 and is connected by the limiting rod 312. The limiting rod 312 is engaged with multiple limiting blocks 32, so that the screen support rod 20 is fixed at different angles to change the projection angle of the screen.

[0053] Understandably, the two sides of the ends where the curtain support rod 20 and the connecting rod 311 are connected are recessed to form a mounting platform. The two connecting rods 311 are respectively mounted on the mounting platform so that the surfaces of the connecting rod 311 and the curtain support rod 20 are on the same plane to form a whole.

[0054] In this embodiment, there are two limiting blocks 32, namely a first limiting block 321 and a second limiting block 322. The adjusting member 31 engages with the first limiting block 321 and the second limiting block 322 respectively to adjust the angle of the curtain support rod 20. Specifically, the limiting rod 312 engages with the first limiting block 321 and the second limiting block 322 respectively, thereby changing the included angle between the connecting rod 311 and the curtain support rod 20, and thus achieving the purpose of adjusting the support angle of the curtain support rod 20.

[0055] In other embodiments, the number of limiting blocks 32 can be increased or decreased according to the angle that the curtain support rod 20 needs to be adjusted. For example, the number of limiting blocks 32 can be three or more, and no specific limitation is made here.

[0056] In this embodiment, the included angle between the adjusting member 31 and the curtain support rod 20 is 90°-120°. Specifically, when the limiting rod 312 and the first limiting block 321 are engaged, the included angle between the connecting rod 311 and the curtain support rod 20 is 90°. When the limiting rod 312 and the second limiting block 322 are engaged, the included angle between the connecting rod 311 and the curtain support rod 20 is 120°.

[0057] In this embodiment, the adjustment structure 30 further includes a base 33, which is installed in the receiving groove 11. A limiting block 32 is installed on the base 33, and an adjustment member 31 is slidably disposed on the base 33. Specifically, the end of the base 33 near the projector 200 is hinged to the end of the screen support rod 20, so that the screen support rod 20 can rotate relative to the mounting rod 10.

[0058] In other embodiments, the limiting block 32 can be directly installed on the bottom surface of the receiving groove 11. Alternatively, the limiting block 32 can also be installed on the surface of the mounting rod 10. No specific limitation is made here.

[0059] Furthermore, the base 33 is provided with a slide rail 331, the direction of which is consistent with the length direction of the receiving groove 11. The adjusting member 31 is slidably disposed in the slide rail 331. The base 33 is a hollow structure, and the limiting block 32 is rotatably installed inside the base 33. When the limiting block 32 is rotated to the locked position, the adjusting member 31 and the limiting block 32 are engaged. When the limiting block 32 is rotated to the unlocked position, the adjusting member 31 slides along the slide rail 331. Specifically, the limiting rod 312 is disposed in the slide rail 331. The first limiting block 321 and the second limiting block 322 are both hinged to the base 33, that is, the first limiting block 321 and the second limiting block 322 can both rotate within the base 33. The limiting block 32 is provided with a groove 301. When the limiting block 32 is rotated to the locked position, the limiting rod 312 is engaged in the groove 301.

[0060] During operation, the curtain support rod 20 is unscrewed from the receiving groove 11, and then the connecting rod 311 is rotated to push the limiting rod 312 to slide in the slide rail 331. When the limiting rod 312 slides to the position of the first limiting block 321, the first limiting block 321 is rotated to the locking position. At this time, the groove 301 of the first limiting block 321 is set towards the limiting rod 312, and the limiting rod 312 is engaged in the groove 301 of the first limiting block 321, thereby realizing the support and fixation of the curtain support rod 20.

[0061] When it is necessary to adjust the support angle of the curtain support rod 20, the limiting rod 312 is separated from the groove 301 of the first limiting block 321, and then the first limiting block 321 is rotated until it reaches the unlocked position. At this time, the lowest point of the first limiting block 321 is located above the slide rail 331, so that the limiting rod 312 can slide smoothly towards the second limiting block 322 within the slide rail 331. When the limiting rod 312 slides to the position of the second limiting block 322, the second limiting block 322 is rotated to the locked position. At this time, the groove 301 of the second limiting block 322 is set towards the limiting rod 312, and the limiting rod 312 is engaged in the groove 301 of the second limiting block 322, thereby changing the support angle of the curtain support rod 20.

[0062] Furthermore, the support structure 100 also includes a support base 40, which is rotatably connected to the mounting rod 10 for supporting the mounting rod 10. Specifically, the support base 40 includes a support rod 41 and a tripod 42. The top end of the support rod 41 is rotatably connected to the mounting rod 10, and the bottom end of the support rod 41 is connected to the tripod 42, which supports the support rod 41.

[0063] In this embodiment, the support rod 41 is a telescopic rod structure. The support rod 41 can extend and retract in the vertical direction, thereby adjusting the projected height and making it more flexible to use.

[0064] To facilitate the overall movement of the support structure 100, the tripod 42 is equipped with casters at its bottom.

[0065] In summary, this utility model embodiment provides a support structure 100 and a projection device 1000. The support structure 100 includes a mounting rod 10, a screen support rod 20, and an adjustment structure 30. The surface of the mounting rod 10 is provided with a receiving groove 11. The screen support rod 20 is used to connect the screen, and the screen support rod 20 is disposed in the receiving groove 11 when separated from the screen. The adjustment structure 30 is installed in the receiving groove 11 and is connected to the screen support rod 20. The adjustment structure 30 is used to adjust the support angle of the screen support rod 20 to adjust the projection angle of the screen. In use, the mounting rod 10 is provided with a receiving groove 11. When the screen support rod 20 is separated from the screen, it is stored in the receiving groove 11. When the screen support rod 20 is connected to the screen, the screen support rod 20 leaves the receiving groove 11 and rotates relative to the receiving groove 11. The adjustment structure 30 in the receiving groove 11 can adjust the angle of the screen support rod 20 relative to the mounting rod 10, thereby adjusting the projection angle of the screen. Even if the bracket structure 100 is installed and fixed, the projection angle of the screen can be adjusted by adjusting the structure 30, making it more flexible to use, improving the projection effect, and further enhancing the projection viewing experience.

[0066] The projection device 1000 includes a screen, a projector 200 body, and a support structure 100. Both the screen and the projector 200 body are connected to the support structure 100. In use, the mounting rod 10 has a receiving groove 11. When the screen support rod 20 is separated from the screen, it is stored in the receiving groove 11. When the screen support rod 20 is connected to the screen, it leaves the receiving groove 11 and rotates relative to it. The adjustment structure 30 within the receiving groove 11 can adjust the angle of the screen support rod 20 relative to the mounting rod 10, thereby adjusting the projection angle of the screen. Even after the support structure 100 is installed and fixed, the projection angle of the screen can still be adjusted via the adjustment structure 30, making it more flexible to use, improving the projection effect, and further enhancing the viewing experience.

[0067] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A support structure, characterized in that, include: Mounting rod (10), the surface of which is provided with receiving groove (11); A curtain support rod (20) is used to connect the curtain; An adjustment structure (30) is installed in the receiving groove (11). The adjustment structure (30) is connected to the screen support rod (20). The adjustment structure (30) is used to adjust the support angle of the screen support rod (20) to adjust the projection angle of the screen.

2. The support structure according to claim 1, characterized in that, The adjustment structure (30) includes an adjustment member (31) and a plurality of limiting blocks (32). The adjustment member (31) and the curtain support rod (20) are movably connected. The plurality of limiting blocks (32) are installed at intervals in the receiving groove (11) along the length direction of the mounting rod (10). The adjustment member (31) is engaged with the plurality of limiting blocks (32) respectively to adjust the angle of the curtain support rod (20).

3. The support structure according to claim 2, characterized in that, There are two limiting blocks (32), namely a first limiting block (321) and a second limiting block (322). The adjusting member (31) is engaged with the first limiting block (321) and the second limiting block (322) respectively to adjust the angle of the curtain support rod (20).

4. The support structure according to claim 2, characterized in that, The adjusting component (31) includes a connecting rod (311) and a limiting rod (312). One end of the connecting rod (311) is connected to the limiting rod (312), and the other end of the connecting rod (311) is rotatably connected to the curtain support rod (20). The limiting rod (312) is engaged with the plurality of limiting blocks (32) to adjust the angle of the curtain support rod (20).

5. The support structure according to claim 2, characterized in that, The adjustment structure (30) further includes a base (33), which is installed in the receiving groove (11), the limiting block (32) is installed on the base (33), and the adjustment member (31) is slidably disposed on the base (33).

6. The support structure according to claim 5, characterized in that, The base (33) is provided with a slide (331), the slide (331) is arranged in the same direction as the length direction of the receiving groove (11), and the adjusting member (31) is slidably arranged in the slide (331).

7. The support structure according to claim 6, characterized in that, The limiting block (32) is rotatably mounted on the base (33). When the limiting block (32) is rotated to the locked position, the adjusting member (31) and the limiting block (32) are engaged. When the limiting block (32) is rotated to the unlocked position, the adjusting member (31) slides along the slide rail (331).

8. The support structure according to claim 7, characterized in that, The limiting block (32) is provided with a groove (301). When the limiting block (32) is rotated to the locking position, the adjusting member (31) is engaged in the groove (301).

9. The support structure according to claim 5, characterized in that, The base (33) is a hollow structure, and the limiting block (32) is rotatably installed inside the base (33).

10. The support structure according to any one of claims 2-9, characterized in that, The included angle between the adjusting member (31) and the curtain support rod (20) is 90°-120°.

11. The support structure according to any one of claims 2-9, characterized in that, The limiting block (32) is installed on the surface of the mounting rod (10).

12. The support structure according to claim 1, characterized in that, The bracket structure (100) further includes a support base (40), which is rotatably connected to the mounting rod (10) for supporting the mounting rod (10). The curtain support rod (20) is disposed in the receiving groove (11) when separated from the curtain.

13. The support structure according to claim 12, characterized in that, The support base (40) includes a support rod (41) and a tripod (42). The top end of the support rod (41) is rotatably connected to the mounting rod (10), and the bottom end of the support rod (41) is connected to the tripod (42). The tripod (42) is used to support the support rod (41).

14. The support structure according to claim 13, characterized in that, The support rod (41) is a telescopic rod structure.

15. The support structure according to claim 13, characterized in that, The tripod (42) is equipped with casters at the bottom.

16. A projection device, characterized in that, It includes a screen, a projector (200) body, and a support structure (100) as described in any one of claims 1-15, wherein the screen and the projector (200) body are both connected to the support structure (100).