A VR projection display device with precise angle adjustment

Abstract

The present invention proposes a VR projection display device with precise angle adjustment, which specifically relates to the technical field of display devices. The VR projection display device with precise angle adjustment includes a tripod and a VR device body, and also includes a first adjustment component, which includes a connecting plate fixedly connected to the tripod, a screw threaded on the top of the tripod, and a first motor fixedly connected to the connecting plate for driving the screw to rotate, and a chassis is fixedly connected to the screw. The first adjustment component is used to adjust the height of the VR device body. The VR projection display device with precise angle adjustment provided by the present invention realizes integrated and precise control of space through a multi-dimensional coordinated adjustment mechanism of height, horizontal angle and pitch angle, and breaks through the limitation of single-dimensional step-by-step operation of traditional devices through the organic combination of self-locking of height adjustment, graduated positioning of horizontal rotation and continuous fine-tuning of pitch swing.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a VR projection display device with precise angle adjustment. Background Art

[0002] With the rapid development of virtual reality projection technology, VR projection display devices are widely used in education, medical care, entertainment and other fields. Such devices usually use a bracket structure to adjust the spatial angle to meet the projection needs in different scenarios. Existing angle adjustment devices usually adopt a multi-component split design, such as adjusting the height through a threaded rod, controlling the horizontal rotation through a gear set, and adjusting the pitch angle through a hinge mechanism, so as to achieve the position and adjustment of the projection equipment in three-dimensional space. However, the adjustment accuracy of such devices and their convenience during installation and adjustment still need to be further optimized.

[0003] Current VR projection display devices have significant defects in the adjustment process: limited by the separate design of the traditional adjustment mechanism, users need to operate multiple independent components one by one when adjusting the height, horizontal angle and pitch angle, and cannot achieve synchronous and precise adjustment of multiple degrees of freedom. This step-by-step adjustment method not only makes the operation process cumbersome and inefficient, but also easily produces cumulative errors due to multiple adjustments, which ultimately affects the projection alignment accuracy. Especially in scenarios that require frequent angle changes, the user experience is severely restricted. Therefore, there is an urgent need for a device structure that can achieve integrated and coordinated adjustment of height, horizontal and pitch angles to improve adjustment efficiency and positioning accuracy.

[0004] Therefore, it is necessary to provide a new VR projection display device with precise angle adjustment to solve the above technical problems. Summary of the Invention

[0005] The technical problem to be solved by this invention is to overcome the shortcomings of the existing technology and provide a high-precision adaptive VR projection device bracket system. Through a multi-dimensional simultaneous adjustment and rapid installation and disassembly setting method, it solves the problems of insufficient adjustment accuracy and low installation and adjustment efficiency of traditional VR brackets, thereby realizing multi-modal adaptation of projection equipment in complex scenes, significantly improving the spatial mapping accuracy and user experience stability of the virtual reality system. The specific technical solution is as follows:

[0006] In order to solve the above technical problems, the present invention provides a VR projection display device with precise angle adjustment, comprising a tripod (1) and a VR device body (11), characterized in that it also includes:

[0007] The first adjusting component (2) comprises a connecting plate (21) fixedly connected to the tripod (1), a screw rod (24) threadedly connected to the top of the tripod (1), and a first motor (22) fixedly connected to the connecting plate (21) for driving the screw rod (24) to rotate, wherein the screw rod (24) is fixedly connected to a chassis (25);

[0008] The second adjusting component (3) comprises a turntable (31) rotatably connected to the upper part of the chassis (25), a gear (33) rotatably connected to the bottom of the turntable (31), a plurality of teeth (34) provided on the chassis (25) and meshing with the gear (33), and a mounting plate (35) rotatably connected to the upper part of the turntable (31);

[0009] A third adjusting component (4) comprises a first electric push rod (41) fixedly connected to the turntable (31) and a hinge block (42) fixedly connected to the protruding end of the first electric push rod (41), wherein the hinge block (42) is hinged to the bottom of the mounting plate (35);

[0010] The locking component (5) comprises a locking block (51) fixedly connected to the bottom of the VR device body (11), a sliding block (53) slidably arranged on the mounting plate (35), a locking head (54) elastically arranged on the sliding block (53) for limiting the locking block (51), and an elastic connection between the locking head (54) and the sliding block (53) via a second spring (58);

[0011] The fourth adjusting component (6) comprises a second electric push rod (61) fixedly connected to the mounting plate (35) and a movable groove (64) provided on the mounting plate (35) for the sliding block (53) to move.

[0012] Preferably, the output end of the first motor (22) is fixedly connected to a telescopic rod (23), the bottom of the screw rod (24) is provided with a slot (241) for inserting the telescopic rod (23), the telescopic rod (23) comprises a main rod (231) fixedly connected to the first motor (22), a secondary rod (232) slidably arranged on the main rod (231) and a first spring (233) for connecting the main rod (231) and the secondary rod (232), and the mounting plate (35) is fixedly connected to a second motor (32) for driving the gear (33) to rotate.

[0013] Preferably, a locking groove (52) having a size adapted to that of the locking head (54) is provided on the locking block (51), and an end portion of the locking head (54) is arranged in an inclined surface, so that when the locking block (51) is aligned with the locking head (54) and inserted into the movable groove (64), the locking block (51) can be squeezed to move the locking block (51) toward the inside of the sliding block (53).

[0014] Preferably, a first sliding block (55) having a T-shaped cross section is fixedly connected to the locking block (51), and a first sliding groove (56) for sliding the first sliding block (55) is provided on the sliding block (53), and the first sliding groove (56) does not pass through the sliding block (53).

[0015] Preferably, an unlocking rod (57) is fixedly connected to the locking head (54), and the unlocking rod (57) is arranged to pass through the sliding block (53). The unlocking rod (57) is used to release the locked state of the VR device body (11) and the mounting plate (35) when the locking head (54) is pulled.

[0016] Preferably, the top of the sliding block (53) is fixedly connected to a second sliding block (62) with a T-shaped cross section, and the bottom of the mounting plate (35) is provided with a second sliding groove (63) adapted to the size of the second sliding block (62), the second sliding groove (63) is arranged in parallel with the movable groove (64), and the length of the second sliding groove (63) is the same as the length of the movable groove (64), so as to ensure that the sliding block (53) can drive the locking head (54) to drive the locking block (51) to move through the locking action of the locking component (5) under the drive of the second electric push rod (61). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a structural schematic diagram of a VR projection display device with precise angle adjustment according to the present invention;

[0019] Figure 2 This is a structural schematic diagram of another angle of a VR projection display device with precise angle adjustment according to the present invention;

[0020] Figure 3 This is a diagram of the adjusted state of a VR projection display device with precise angle adjustment according to the present invention;

[0021] Figure 4 This is a diagram showing the connection relationship of the chassis of a VR projection display device with precise angle adjustment according to the present invention;

[0022] Figure 5 This is a bottom view of a mounting plate of a VR projection display device with precise angle adjustment according to the present invention;

[0023] Figure 6 This is a diagram showing the positional relationship between a VR device body and a mounting plate of a VR projection display device with precise angle adjustment according to the present invention;

[0024] Figure 7 This is an exploded schematic diagram of a VR device body and a mounting plate of a VR projection display device with precise angle adjustment according to the present invention;

[0025] Figure 8 This is a structural schematic diagram of a sliding block of a VR projection display device with precise angle adjustment according to the present invention;

[0026] Figure 9 This is a disassembled diagram of the unlocking lever and sliding block of a VR projection display device with precise angle adjustment according to the present invention;

[0027] Figure 10 This is a diagram showing the positional relationship between the telescopic rod and screw of a VR projection display device with precise angle adjustment according to the present invention.

[0028] Description of Figure Numbers:

[0029] 1. Tripod, 11. VR device body;

[0030] 2. First adjusting component, 21. Connecting plate, 22. First motor, 23. Telescopic rod, 231. Main rod, 232. Secondary rod, 233. First spring, 24. Screw, 241. Slot, 25. Chassis;

[0031] 3. Second adjustment component, 31. Turntable, 32. Second motor, 33. Gear, 34. Teeth, 35. Mounting plate;

[0032] 4. Third adjusting component, 41. First electric push rod, 42. Articulated block;

[0033] 5. Locking component, 51. Locking block, 52. Locking groove, 53. Sliding block, 54. Locking head, 55. First slider, 56. First sliding groove, 57. Unlocking lever, 58. Second spring;

[0034] 6. Fourth adjusting component, 61. Second electric push rod, 62. Second slider, 63. Second slide groove, 64. Movable groove. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0037] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] See also Figures 1 to 10 As shown, an embodiment of the present invention provides a VR projection display device with precise angle adjustment, including a tripod 1 and a VR device body 11, and also includes: a first adjusting component 2, which includes a connecting plate 21 fixedly connected to the tripod 1, a screw 24 threadedly connected to the top of the tripod 1 and a first motor 22 fixedly connected to the connecting plate 21 for driving the screw 24 to rotate, and a chassis 25 fixedly connected to the screw 24. The first adjusting component 2 is used to adjust the height of the VR device body 11. With this arrangement, automatic control of height adjustment is achieved through the combination of motor drive and thread transmission, avoiding the cumbersomeness of traditional manual knob operation. The self-locking characteristics of the thread transmission ensure that the height position after adjustment is stable and reliable, and even if the device is subjected to external vibration or load changes during operation, the preset height can be effectively maintained unchanged.

[0039] In addition, the second adjustment component 3 includes a turntable 31 rotatably connected to the top of the chassis 25, a gear 33 rotatably connected to the bottom of the turntable 31, a plurality of teeth 34 arranged on the chassis 25 and meshing with the gear 33, and a mounting plate 35 rotatably connected to the top of the turntable 31. The second adjustment component 3 is used to adjust the horizontal angle of the VR device body 11. The horizontal angle adjustment is achieved through the meshing transmission of the turntable 31 and the teeth 34 of the gear 33 on the chassis 25. This mechanical structure not only ensures high repeatability of the horizontal angle adjustment, but also prevents accidental deviation caused by external force interference through the self-locking characteristics of the gear 33 pair. Compared with the traditional bearing rotation structure, the forced engagement mechanism of the gear 33 teeth 34 significantly improves the ability to resist lateral impact, and can effectively suppress the shaking of the equipment in dynamic projection scenes.

[0040] Secondly, the third adjusting component 4 includes a first electric push rod 41 fixedly connected to the turntable 31 and a hinge block 42 fixedly connected to the protruding end of the first electric push rod 41. The hinge block 42 is hinged to the bottom of the mounting plate 35. The second adjusting component 3 is used to adjust the pitch angle of the VR device body 11. The pitch adjustment structure of the hinge block 42 is driven by the electric push rod to achieve the unity of large-range angle adjustment and micro-motion accuracy. The linear output of the electric push rod is converted into a pitch angle change of the mounting plate 35 through the lever effect of the hinge block 42, making the pitch angle adjustment more convenient.

[0041] Again, the locking component 5 includes a locking block 51 fixedly connected to the bottom of the VR device body 11, a sliding block 53 slidably set on the mounting plate 35, and a locking head 54 elastically set on the sliding block 53 for limiting the locking block 51. The locking component 5 is used to lock the VR device body 11 and the mounting plate 35. That is to say, the inclined self-locking mechanism of the locking block 51 and the sliding block 53, the core of which is to achieve rapid disassembly and assembly and highly reliable fixation through the synergistic effect of geometric configuration and elastic preload. This structure breaks through the efficiency bottleneck of traditional bolt locking and realizes the convenient operation of one-plug-and-lock and one-pull-and-unload.

[0042] In addition, the fourth adjustment component 6 includes a second electric push rod 61 fixedly connected to the mounting plate 35 and a movable groove 64 opened on the mounting plate 35 for the movement of the sliding block 53. The fourth adjustment component 6 is used to adjust the horizontal position of the VR device body 11. The guide design of the movable groove 64 constrains the sliding block 53 to move only along a single degree of freedom, eliminating the risk of multi-directional movement and ensuring a strict linear relationship between the horizontal displacement and the push rod stroke. This structure enables the device to compensate for the projection offset caused by mechanical clearance or installation error through horizontal displacement after completing the pitch or rotation adjustment, thereby realizing the closed-loop correction capability of multi-degree-of-freedom adjustment.

[0043] Specifically, the first adjusting component 2 adjusts the height of the device, the second adjusting component 3 adjusts the horizontal angle of the device, the third adjusting component 4 adjusts the pitch angle of the device, the fourth adjusting component 6 adjusts the horizontal position of the device, and the locking component 5 is used to lock the device to the mounting plate 35. During specific implementation, adjustments in multiple dimensions can be performed simultaneously, greatly improving the convenience of device adjustment.

[0044] In addition, the output end of the first motor 22 is fixedly connected to the telescopic rod 23, and a slot 241 for inserting the telescopic rod 23 is provided at the bottom of the screw 24. The telescopic rod 23 includes a main rod 231 fixedly connected to the first motor 22, a sub-rod 232 slidably set on the main rod 231 and a first spring 233 for connecting the main rod 231 and the sub-rod 232. The mounting plate 35 is fixedly connected to the second motor 32 for driving the gear 33 to rotate. The elastic connection design effectively alleviates the assembly error between the output end of the motor and the screw 24 and the slight deformation during dynamic operation, avoiding mechanical jamming or component wear caused by rigid connection. In addition, during frequent adjustments, the telescopic rod 23 can adaptively compensate for dimensional deviations caused by temperature changes or mechanical fatigue, ensuring the continuity and stability of power transmission, while extending the service life of transmission components. This flexible docking mechanism also reduces the process requirements for precision assembly and improves the fault tolerance of the overall structure.

[0045] Furthermore, a locking groove 52 that is adapted to the size of the locking head 54 is provided on the locking block 51, and the end of the locking head 54 is arranged at an angle, so that when the locking block 51 is aligned with the locking head 54 and inserted into the movable groove 64, the locking block 51 can be squeezed to make the locking block 51 move toward the sliding block 53. In other words, the inclined structure converts the vertical insertion force into a lateral locking force through the principle of mechanical decomposition, so that the locking process can achieve reliable locking without strict alignment, which greatly reduces the accuracy requirements of the installation operation. The self-guiding feature is particularly suitable for fast disassembly and assembly scenarios. The user only needs to gently push the device body into place to complete the fixation, avoiding the repeated calibration operations required for traditional bolt locking. At the same time, the continuous pressing force provided by the elastic element can adaptively compensate for the mechanical gap to ensure that the locking state can remain stable in a vibration environment or after long-term use.

[0046] It should be noted that during installation, the locking block 51 at the bottom of the VR device body 11 needs to be aligned with the position of the locking head 54 for installation. The locking head 54 can be moved to the extreme positions on both sides of the mounting plate 35 by the second electric push rod 61 to facilitate alignment of the locking block 51 and the locking head 54.

[0047] Secondly, a first slider 55 with a T-shaped cross-section is fixedly connected to the locking block 51, and a first slide groove 56 for the sliding of the first slider 55 is provided on the sliding block 53. The first slide groove 56 does not penetrate the sliding block 53. The locking head 54 and the sliding block 53 are elastically connected by a second spring 58. The three-dimensional limiting design of the T-shaped structure effectively prevents the locking block 51 from accidentally falling out in the horizontal and vertical directions, thereby enhancing the impact resistance of the locking mechanism under complex working conditions. The closed structure of the second slide groove 63 prevents dust or foreign matter from entering the moving pair, thereby improving the environmental adaptability of the mechanical system. The elastic preload mechanism not only provides a buffer for the locking process, but also automatically compensates for the gap caused by wear during long-term use, maintains the constant locking force, and thus avoids the reduction of positioning accuracy due to mechanical loosening.

[0048] Again, an unlocking rod 57 is fixedly connected to the locking head 54, and the unlocking rod 57 is set through the sliding block 53. The unlocking rod 57 is used to release the locked state of the VR device body 11 and the mounting plate 35 when the locking head 54 is pulled. The mechanical linkage design of the integrated unlocking mechanism realizes the "touch and go" quick release function. The user only needs to lightly pull the unlocking rod 57 with one finger to release the locked state. The operation experience is intuitive and labor-saving. This design converts the complex internal locking logic into a simple external linear operation, which not only ensures the safety of device locking, but also greatly improves the disassembly and assembly efficiency. It is particularly suitable for application scenarios where frequent device replacement is required.

[0049] At the same time, the top of the sliding block 53 is fixedly connected to a second sliding block 62 with a T-shaped cross-section, and the bottom of the mounting plate 35 is provided with a second sliding groove 63 that is adapted to the size of the second sliding block 62. A stable friction pair is formed between the rigid guide surface of the sliding groove and the sliding surface of the slider to ensure that the push rod driving force is efficiently converted into linear displacement. This design also provides additional anti-torsion support for the sliding block 53, so that it can still maintain the linearity of the motion trajectory when subjected to eccentric loads, thereby improving the reliability of the entire horizontal position adjustment system.

[0050] Furthermore, the second slide groove 63 is arranged in parallel with the movable groove 64, and the length of the second slide groove 63 is the same as the length of the movable groove 64, so as to ensure that the sliding block 53 can drive the locking head 54 to move the locking block 51 through the locking action of the locking component 5 under the drive of the second electric push rod 61. Through the precise matching of geometric constraints, it is ensured that the push rod driving force is always transmitted in the predetermined direction, eliminating the lateral force or motion interference caused by structural misalignment. In addition, the consistent design of the slide groove length enables the sliding block 53 to still maintain sufficient guide support at the end point of the stroke, avoiding local stress concentration or mechanism jamming. This spatial collaborative design not only improves the smoothness of the adjustment process, but also provides a mechanical basis for the linkage control of multi-dimensional adjustment, so that the compound adjustment of height, horizontal angle and pitch angle can be precisely coordinated.

[0051] In addition, a guide surface with an inclined surface is provided at the end of the slot 241 to facilitate the alignment of the secondary rod 232. Through the setting of the inclined surface guide, the axial insertion action is automatically converted into a radial centering adjustment, which significantly improves the docking fault tolerance of the telescopic rod 23 and the slot 241.

[0052] Working principle:

[0053] This VR projection display device, based on a tripod 1, achieves multi-degree-of-freedom spatial adjustment through the coordinated cooperation of multi-stage mechanical transmission and electric drive. When height adjustment is activated, a first motor 22 drives a screw 24 to rotate within a threaded pair at the top of the tripod 1, driving the chassis 25 and the upper components to rise and fall as a whole. The self-locking nature of the threaded transmission ensures stability after lifting and positioning. Horizontal angle adjustment is accomplished by a second adjustment component 3: a motor-driven gear 33 meshes and rotates along the teeth 34 of the chassis 25, driving the turntable 31 and mounting plate 35 to precisely deflect around their axis. Furthermore, pitch adjustment is achieved by linearly extending and retracting a first electric push rod 41, pushing a hinge block 42. This leverages the principle of leverage to tilt the mounting plate 35 about its hinge point. The linear relationship between the push rod travel and the pitch angle simplifies control logic. The device body is quickly secured by the inclined self-locking mechanism of the locking block 51 and the sliding block 53. A second electric push rod 61 drives the sliding block 53 to translate along a movable slot 64, achieving fine-tuning of the horizontal position. Each adjustment module achieves highly integrated multi-dimensional control through the design of geometric constraints and power transmission.

[0054] Compared with related technologies, the VR projection display device with precise angle adjustment provided by the present invention has the following beneficial effects:

[0055] The present invention proposes a VR projection display device with precise angle adjustment, achieving integrated, precise spatial control through a multi-dimensional coordinated adjustment mechanism for height, horizontal angle, and pitch angle. Each adjustment component utilizes a composite design featuring a gear 33 meshing drive, a threaded lifting drive, and a push rod lever linkage. This organically combines the self-locking nature of height adjustment, graduated positioning of horizontal rotation, and continuous fine-tuning of pitch swing, transcending the limitations of traditional devices' single-dimensional, step-by-step operation. This integrated adjustment mechanism not only significantly improves positioning efficiency but also, through dynamic compensation between dimensions, ensures high-precision matching of the projection device in complex spatial scenarios, meeting the stringent requirements of VR devices for real-time linkage across multiple degrees of freedom.

[0056] 2. The VR projection display device with precise angle adjustment proposed in the present invention has a locking component 5 that adopts a design of inclined self-locking and elastic preload to achieve rapid disassembly and reliable fixation of the VR device. The wedge-shaped guide structure of the locking head 54 combined with the adaptive compensation capability of the elastic element enables automatic locking without precise alignment during device installation, and only a single-step operation is required to release the constraint during disassembly. Compared with traditional bolt locking or snap-on split structures, this design greatly simplifies the operating process and eliminates tool dependence. It is particularly suitable for scenarios such as exhibition demonstrations, education and training where frequent equipment replacement is required. At the same time, the synergistic effect of geometric locking and elastic buffering ensures that the device can maintain a stable locking state under vibration or impact environments.

[0057] 3. The VR projection display device with precise angle adjustment proposed in the present invention realizes dynamic error elimination and global precision optimization through closed-loop linkage between the horizontal displacement compensation mechanism and the multi-dimensional adjustment system. In addition, multiple dimensions can be adjusted simultaneously during adjustment, which greatly improves the adjustment efficiency. In addition, the collaborative control logic of the multiple adjustment modules can balance the relationship between height, angle and displacement, avoiding the error accumulation problem caused by step-by-step adjustment. This design can still maintain the consistency of projection positioning under complex working conditions.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A VR projection display device with precise angle adjustment, comprising a tripod (1) and a VR device body (11), characterized in that: Also includes: The first adjusting component (2) comprises a connecting plate (21) fixedly connected to the tripod (1), a screw rod (24) threadedly connected to the top of the tripod (1), and a first motor (22) fixedly connected to the connecting plate (21) for driving the screw rod (24) to rotate, wherein the screw rod (24) is fixedly connected to a chassis (25); The second adjusting component (3) comprises a turntable (31) rotatably connected to the upper part of the chassis (25), a gear (33) rotatably connected to the bottom of the turntable (31), a plurality of teeth (34) provided on the chassis (25) and meshing with the gear (33), and a mounting plate (35) rotatably connected to the upper part of the turntable (31); A third adjusting component (4) comprises a first electric push rod (41) fixedly connected to the turntable (31) and a hinge block (42) fixedly connected to the protruding end of the first electric push rod (41), wherein the hinge block (42) is hinged to the bottom of the mounting plate (35); The locking component (5) comprises a locking block (51) fixedly connected to the bottom of the VR device body (11), a sliding block (53) slidably arranged on the mounting plate (35), a locking head (54) elastically arranged on the sliding block (53) for limiting the locking block (51), and an elastic connection between the locking head (54) and the sliding block (53) via a second spring (58); The fourth adjusting component (6) comprises a second electric push rod (61) fixedly connected to the mounting plate (35) and a movable groove (64) provided on the mounting plate (35) for the sliding block (53) to move.

2. The VR projection display device with precise angle adjustment according to claim 1, characterized in that: The output end of the first motor (22) is fixedly connected to a telescopic rod (23); a slot (241) for inserting the telescopic rod (23) is provided at the bottom of the screw rod (24); the telescopic rod (23) comprises a main rod (231) fixedly connected to the first motor (22), a secondary rod (232) slidably arranged on the main rod (231), and a first spring (233) for connecting the main rod (231) and the secondary rod (232); and a second motor (32) for driving the gear (33) to rotate is fixedly connected to the mounting plate (35).

3. The VR projection display device with precise angle adjustment according to claim 1, characterized in that: The locking block (51) is provided with a locking groove (52) that matches the size of the locking head (54), and the end of the locking head (54) is arranged in an inclined surface, so that when the locking block (51) is aligned with the locking head (54) and inserted into the movable groove (64), the locking block (51) can be squeezed to move the locking block (51) toward the inside of the sliding block (53).

4. The VR projection display device with precise angle adjustment according to claim 3, characterized in that: A first sliding block (55) having a T-shaped cross section is fixedly connected to the locking block (51), and a first sliding groove (56) for sliding the first sliding block (55) is provided on the sliding block (53), and the first sliding groove (56) does not penetrate the sliding block (53).

5. The VR projection display device with precise angle adjustment according to claim 4, characterized in that: The locking head (54) is fixedly connected to an unlocking rod (57), which is arranged to pass through the sliding block (53). The unlocking rod (57) is used to release the locked state between the VR device body (11) and the mounting plate (35) when the locking head (54) is pulled.

6. The VR projection display device with precise angle adjustment according to claim 1, characterized in that: The top of the sliding block (53) is fixedly connected to a second sliding block (62) with a T-shaped cross section, and the bottom of the mounting plate (35) is provided with a second sliding groove (63) adapted to the size of the second sliding block (62). The second sliding groove (63) is arranged in parallel with the movable groove (64), and the length of the second sliding groove (63) is the same as the length of the movable groove (64), so as to ensure that the sliding block (53) can drive the locking head (54) to drive the locking block (51) to move through the locking action of the locking component (5) under the drive of the second electric push rod (61).

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