Adjustable multi-angle projection device

Abstract

The utility model relates to the technical field of projection devices, in particular to an adjustable multi-angle projection device, which comprises a top mounting rack, mounting holes are formed in four corners of the top mounting rack, a multi-angle adjusting mechanism is rotatably connected to the lower end of the top mounting rack, a projector is fixedly mounted on the multi-angle adjusting mechanism, and the top mounting rack is provided with a projection hole. A protective shell is fixedly mounted in the middle of the upper end of the top mounting frame, and the upper portion of the multi-angle adjusting mechanism penetrates through the top mounting frame and is located in the protective shell. The adjustable multi-angle projection device provided by the utility model is compact in structure and flexible in adjustment, realizes horizontal rotation and accurate control of a pitch angle of the projector through the multi-angle adjustment mechanism, and is adaptive to different wall layouts; and in cooperation with PID control, the positioning precision and the picture correction capability are improved, and the method is suitable for various scenes such as immersive display and virtual reality and has good application prospects and practicability.

Description

Technical Field

[0001] This utility model relates to the field of projection device technology, and in particular to an adjustable multi-angle projection device. Background Technology

[0002] With the continuous development of multimedia technology and the demand for immersive experiences, traditional fixed or limited-angle adjustable projection devices can no longer meet the needs of modern exhibition, education, and entertainment scenarios for spatial stereoscopic projection and multi-directional visual coverage. Most projection devices on the market currently only support limited manual adjustment, lacking automated control functions and unable to flexibly adapt to different wall layouts or dynamic scene transitions. Especially in virtual reality exhibition halls, themed exhibition rooms, home theaters, and interactive teaching environments, users often want to project images onto multiple walls or even the floor to create a surround or immersive visual effect. However, existing devices have significant shortcomings in terms of angle adjustment freedom, remote control convenience, and adaptive image correction, leading to complex installation and debugging, limited use, and impacting user experience and practical application effectiveness. Therefore, we propose an adjustable multi-angle projection device. Utility Model Content

[0003] The main objective of this invention is to provide an adjustable multi-angle projection device that can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An adjustable multi-angle projection device includes a top mounting bracket with mounting holes at all four corners. A multi-angle adjustment mechanism is rotatably connected to the lower end of the top mounting bracket. A projector is fixedly mounted on the multi-angle adjustment mechanism. A protective shell is fixedly mounted on the upper middle part of the top mounting bracket. The upper part of the multi-angle adjustment mechanism passes through the top mounting bracket and is located inside the protective shell.

[0006] The multi-angle adjustment mechanism includes a steering component that is movably connected to the top mounting bracket, a first forward and reverse motor fixedly installed inside the protective housing, a drive gear fixedly connected to the output end of the first forward and reverse motor and drivingly connected to the upper part of the steering component, and an angle adjustment component fixedly connected to the lower part of the steering component.

[0007] Preferably, the steering assembly includes a movable rod that is movably connected to the top mounting bracket, a transmission gear fixedly connected to the top of the movable rod and meshing with the drive gear, and a steering platform fixedly connected to the bottom of the movable rod and located at the lower end of the top mounting bracket.

[0008] By adopting the above technical solution, the projector's horizontal rotation adjustment function is realized. The movable rod, as the core rotating component, is driven by a transmission gear meshing with a drive gear at its upper part, while its lower part drives the turntable to rotate synchronously, thereby achieving precise control of the projection direction. The reasonable structural design and stable transmission allow the projector to flexibly adjust the projection angle, adapting to different wall layouts and improving the device's adaptability and ease of use.

[0009] Preferably, the diameter of the transmission gear is larger than the diameter of the drive gear, and both the transmission gear and the drive gear are located inside the protective housing.

[0010] By adopting the above technical solution: a large-diameter transmission gear and a small-diameter drive gear form a reduction transmission structure. The No. 1 forward and reverse motor drives the transmission gear to rotate through the drive gear, realizing low-speed high-torque output and ensuring smooth and powerful steering. This reduction and force-increasing design improves rotational accuracy and load capacity. At the same time, key transmission components are placed inside the protective shell, which effectively prevents dust and interference and extends the service life of the equipment.

[0011] Preferably, the angle adjustment assembly includes a steering support frame fixedly connected to the outer surface of the steering platform, a side support plate fixedly connected to the bottom of the steering support frame, a transmission frame fixedly connected to the side support plate, and an adjustment unit movably connected to the transmission frame and fixedly installed with the projector.

[0012] By adopting the above technical solution, the angle adjustment component provides a support platform for the projector to swing up and down around the central axis. The transmission frame plays a guiding and load-bearing role, while the adjustment unit drives the projector to adjust the pitch angle. The overall structure is compact and has a strong load-bearing capacity. It can realize the vertical angle adjustment of the projector without changing the horizontal rotation, further expanding the application range of projection.

[0013] Preferably, the adjustment unit includes a second forward and reverse motor fixedly installed at the bottom of the steering support frame, a worm gear fixedly connected to the output end of the second forward and reverse motor and located in the side support plate, a worm wheel movably installed in the transmission frame, a worm wheel fixedly connected to the middle of the worm wheel and connected to the worm gear for transmission, and a mounting bracket fixedly connected to the mounting rod and located outside the transmission frame.

[0014] By adopting the above technical solution: the adjustment unit utilizes a worm gear transmission mechanism to achieve precise angle fine-tuning. A second forward and reverse motor drives the worm gear to rotate, which in turn rotates the worm wheel. This rotation, via the mounting rod, drives the mounting bracket and projector to adjust the pitch angle. Simultaneously, the worm gear structure has a self-locking characteristic, preventing displacement due to gravity and ensuring the angle remains stable after adjustment. It also supports stepless angle adjustment, improving the adaptability and clarity of the projected image.

[0015] Preferably, the projector is fixedly mounted on a mounting bracket.

[0016] By adopting the above technical solution, the mounting bracket serves as the direct load-bearing structure of the projector and is firmly connected to it, ensuring stability during multi-angle adjustments.

[0017] Preferably, both the No. 2 forward and reverse motor and the No. 1 forward and reverse motor are controlled by the controller via software PID.

[0018] By adopting the above technical solution, a closed-loop control system based on the PID algorithm is introduced to precisely control the first and second forward / reverse motors respectively. The controller receives the target angle or spatial parameters input by the user and, combined with feedback signals from gyroscopes, encoders, etc., adjusts the motor speed and position in real time to ensure that the projector rotates accurately to the set angle. This is an existing technical method and will not be elaborated further here. PID control has the advantages of fast response, good stability, and strong anti-interference ability. It is a classic control method widely used in industrial automation. Applying it to this utility model not only improves the positioning accuracy of the projector but also realizes functions such as automatic calibration and keystone correction, significantly improving the level of intelligent operation and user experience.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model achieves 360° horizontal rotation of the projector through the transmission design of the steering component and drive gear, making it easy to accurately align the projected image with different walls and create a surround immersive experience. It adopts a No. 1 forward and reverse motor to drive the drive gear, which meshes with a large-diameter transmission gear, which not only improves the rotation torque but also enhances the positioning accuracy. This allows the projector to automatically rotate to a preset angle under the command of the controller, projecting the image onto different walls in the room and realizing multi-area content display. This structure is suitable for various scenarios such as exhibition halls, VR classrooms, and home theaters, significantly improving the adaptability and flexibility of the equipment.

[0021] 2. This invention utilizes a worm gear structure in the angle adjustment component to achieve high-precision adjustment of the projector's tilt angle, ensuring clear and distortion-free image display on walls of varying heights and distances. Simultaneously, the introduction of a worm gear transmission mechanism, driven by a second forward and reverse motor, enables fine-tuning of the projector's tilt angle. Combined with a PID control system, it automatically performs keystone correction and image matching, preventing image distortion caused by differences in installation height. This design is particularly suitable for projection applications in non-standard spatial environments, such as tilted walls and irregular ceilings, significantly improving image quality and user immersion. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an adjustable multi-angle projection device according to the present invention.

[0023] Figure 2 This is a partial structural schematic diagram of an adjustable multi-angle projection device according to the present invention;

[0024] Figure 3 This is a partial structural schematic diagram of the multi-angle adjustment mechanism of an adjustable multi-angle projection device according to the present invention;

[0025] Figure 4 This is a schematic diagram of the adjustment unit of an adjustable multi-angle projection device according to the present invention.

[0026] In the diagram: 1. Top mounting bracket; 11. Mounting hole; 2. Multi-angle adjustment mechanism; 21. Steering assembly; 211. Movable rod; 212. Transmission gear; 213. Steering platform; 22. First forward / reverse motor; 23. Drive gear; 24. Angle adjustment assembly; 241. Steering support frame; 242. Side support plate; 243. Transmission frame; 244. Adjustment unit; 2441. Second forward / reverse motor; 2442. Worm gear; 2443. Mounting rod; 2444. Worm wheel; 2445. Mounting bracket; 3. Protective shell; 4. Projector. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Please see Figure 1-4This utility model provides a technical solution:

[0031] An adjustable multi-angle projection device includes a top mounting bracket 1, with mounting holes 11 at each of the four corners of the top mounting bracket 1. A multi-angle adjustment mechanism 2 is rotatably connected to the lower end of the top mounting bracket 1. A projector 4 is fixedly mounted on the multi-angle adjustment mechanism 2. A protective shell 3 is fixedly mounted on the upper middle part of the top mounting bracket 1. The upper part of the multi-angle adjustment mechanism 2 passes through the top mounting bracket 1 and is located inside the protective shell 3.

[0032] In this embodiment, the multi-angle adjustment mechanism 2 includes a steering assembly 21 that is movably connected to the top mounting bracket 1, a first forward and reverse motor 22 fixedly installed inside the protective shell 3, a drive gear 23 fixedly connected to the output end of the first forward and reverse motor 22 and drivingly connected to the upper part of the steering assembly 21, and an angle adjustment assembly 24 fixedly connected to the lower part of the steering assembly 21. The steering assembly 21 includes a movable rod 211 that is movably connected to the top mounting bracket 1, a transmission gear 212 fixedly connected to the top of the movable rod 211 and meshing with the drive gear 23, and a steering platform 213 fixedly connected to the bottom of the movable rod 211 and located at the lower end of the top mounting bracket 1. The diameter of the transmission gear 212 is larger than the diameter of the drive gear 23, and both the transmission gear 212 and the drive gear 23 are located inside the protective shell 3.

[0033] The above scheme describes a multi-angle adjustment mechanism 2, which includes a steering assembly 21, a primary forward / reverse motor 22, a drive gear 23, and an angle adjustment assembly 24. The steering assembly 21 consists of a movable rod 211, a transmission gear 212, and a steering platform 213. The movable rod 211 is movably connected to the top mounting bracket 1. The transmission gear 212, which is fixedly connected to the top of the rod, meshes with the drive gear 23. The drive gear 23 is driven to rotate by the primary forward / reverse motor 22 inside the protective shell 3. When the primary forward / reverse motor 22 is started, it drives the drive gear 23 to rotate. After the transmission gear 212 reduces speed and increases force, it drives the movable rod 211 to rotate, thereby causing the steering platform 213 to rotate 360° in the horizontal plane. This allows for the adjustment of the projector 4's orientation angle and precise alignment with the target wall.

[0034] In this embodiment, the angle adjustment assembly 24 includes a steering support frame 241 fixedly connected to the outer surface of the steering platform 213, a side support plate 242 fixedly connected to the bottom of the steering support frame 241, a transmission frame 243 fixedly connected to the side support plate 242, and an adjustment unit 244 movably connected to the transmission frame 243 and fixedly installed with the projector 4. The adjustment unit 244 includes a second forward and reverse motor 2441 fixedly installed at the bottom of the steering support frame 241, a worm gear 2442 fixedly connected to the output end of the second forward and reverse motor 2441 and located in the side support plate 242, a worm wheel 2444 movably installed in the transmission frame 243, a worm wheel 2444 fixedly connected to the middle of the worm wheel 2444 and drivingly connected to the worm gear 2442, and a mounting bracket 2445 fixedly connected to the mounting rod 2443 and located outside the transmission frame 243. The projector 4 is fixedly installed on the mounting bracket 2445. The second forward and reverse motor 2441 and the first forward and reverse motor 22 are both controlled by the controller via software PID.

[0035] Through the above scheme: the angle adjustment component 24 includes a steering support frame 241, a side support plate 242, a transmission frame 243, and an adjustment unit 244. The adjustment unit 244 consists of a second forward and reverse motor 2441, a worm gear 2442, a worm wheel 2444, and a mounting bracket 2445. The second forward and reverse motor 2441 drives the worm gear 2442 to rotate, which in turn drives the worm wheel 2444 to rotate, thereby causing the mounting rod 2443 to drive the mounting bracket 2445 to swing up and down, thereby driving the projector 4 to adjust the pitch angle, ensuring that the projected image is accurate, clear, and distortion-free.

[0036] It should be noted that this utility model is an adjustable multi-angle projection device, particularly suitable for application scenarios that require creating an immersive visual atmosphere, such as virtual reality exhibition halls, themed exhibition halls, home theaters, and interactive educational spaces. In actual use, the device is fixed to the center of the room ceiling via the top mounting bracket 1, and securely installed using the mounting holes 11 at its four corners, ensuring stable and reliable operation. In practical applications, users can set different projection images on different walls according to the needs of the content to be displayed. For example, one wall can display a forest scene, another wall can display a starry night view, and a third wall can display a city street scene, creating an immersive sense of space. At this time, the first forward and reverse motor 22 is activated, and the drive gear 23 connected to its output end meshes with the transmission gear 212 in the steering assembly 21, driving the movable rod 211 to rotate, so that the steering platform 213 below rotates 360° in the horizontal plane, thereby controlling the projection direction of the projector 4 and accurately aligning it with the target wall. At the same time, in order to adapt to the needs of wall projection at different heights and distances, the second forward and reverse motor 2441 can also be activated, driving the worm gear 2442 to drive the worm wheel 2444 to rotate, so that the mounting bracket 2445 drives the projector 4 to make fine adjustments to the pitch angle, ensuring that the projected image is accurate in proportion, clear and without distortion. The entire adjustment process can be remotely operated via the controller. Combined with the PID control algorithm, it achieves high-precision positioning and image correction, ensuring that the projected image always adapts to the wall size and angle. It can automatically switch between multiple angles without manual intervention, greatly improving ease of use and immersive experience.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable multi-angle projection device, comprising a top mounting bracket (1), characterized in that: The top mounting bracket (1) has mounting holes (11) at all four corners. The lower end of the top mounting bracket (1) is rotatably connected to a multi-angle adjustment mechanism (2). A projector (4) is fixedly mounted on the multi-angle adjustment mechanism (2). A protective shell (3) is fixedly mounted on the upper middle part of the top mounting bracket (1). The upper part of the multi-angle adjustment mechanism (2) passes through the top mounting bracket (1) and is located inside the protective shell (3). The multi-angle adjustment mechanism (2) includes a steering assembly (21) that is movably connected to the top mounting bracket (1), a first forward and reverse motor (22) that is fixedly installed in the protective shell (3), a drive gear (23) that is fixedly connected to the output end of the first forward and reverse motor (22) and is connected to the upper part of the steering assembly (21) for transmission, and an angle adjustment assembly (24) that is fixedly connected to the lower part of the steering assembly (21).

2. The adjustable multi-angle projection device according to claim 1, characterized in that: The steering assembly (21) includes a movable rod (211) that is movably connected to the top mounting bracket (1), a transmission gear (212) that is fixedly connected to the top of the movable rod (211) and meshes with the drive gear (23), and a steering platform (213) that is fixedly connected to the bottom of the movable rod (211) and located at the lower end of the top mounting bracket (1).

3. The adjustable multi-angle projection device according to claim 2, characterized in that: The diameter of the transmission gear (212) is larger than the diameter of the drive gear (23), and both the transmission gear (212) and the drive gear (23) are located inside the protective shell (3).

4. The adjustable multi-angle projection device according to claim 1, characterized in that: The angle adjustment assembly (24) includes a steering support frame (241) fixedly connected to the outer surface of the steering platform (213), a side support plate (242) fixedly connected to the bottom of the steering support frame (241), a transmission frame (243) fixedly connected to the side support plate (242), and an adjustment unit (244) movably connected to the transmission frame (243) and fixedly installed with the projector (4).

5. An adjustable multi-angle projection device according to claim 4, characterized in that: The adjustment unit (244) includes a second forward and reverse motor (2441) fixedly installed at the bottom of the steering support frame (241), a worm gear (2442) fixedly connected to the output end of the second forward and reverse motor (2441) and located in the side support plate (242), a worm wheel (2444) movably installed in the transmission frame (243), a worm wheel (2444) fixedly connected to the middle of the worm wheel (2444) and connected to the worm gear (2442) in a transmission, and a mounting bracket (2445) fixedly connected to the mounting rod (2443) and located outside the transmission frame (243).

6. The adjustable multi-angle projection device according to claim 1, characterized in that: The projector (4) is fixedly mounted on the mounting bracket (2445).

7. An adjustable multi-angle projection device according to claim 5, characterized in that: Both the No. 2 forward and reverse motor (2441) and the No. 1 forward and reverse motor (22) are controlled by the controller via software PID.

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