Holographic water curtain projection device and method of use

Abstract

This invention discloses a holographic water curtain projection device and its usage method, including a movable frame; a base plate fixedly connected to the top of the movable frame, an adjustable top plate directly above the top of the base plate, and a lifting mechanism between the top plate and the base plate. This invention, through the coordinated use of a servo motor, gears, racks, guide rails, and guide grooves, can move protective plates one and two upwards and completely retract them into the top of the protective box. After retracting, protective plates one and two do not block the projection light, nor do they occupy any space outside the box. Side-opening designs require space on both sides of the box, while downward-opening designs extend outside the box, occupying ground or pedestrian space. Manually closing the cover also requires finding a place to put it. In contrast, this structure leaves the outside of the box clean after retraction, allowing the projection light to shine directly onto the water curtain without any obstruction. This solves the problems of existing protective methods that either block light, occupy space, or cause inconvenience at outdoor water curtain sites.

Description

Technical Field

[0001] This invention relates to the field of holographic water screen projection, specifically to a holographic water screen projection device and its usage method. Background Technology

[0002] Holographic water screen projection technology uses a water screen as a projection medium to project holographic images onto the water screen, creating a visually stunning and three-dimensional effect. It is widely used in large-scale performances, theme parks, urban lighting projects, and outdoor advertising. Since water screen projection is typically conducted outdoors or semi-outdoors, the projection equipment is exposed to adverse factors such as moisture, splashes, rain, and dust. Therefore, high demands are placed on the protective performance and portability of the projector and its auxiliary devices.

[0003] For example, the holographic water curtain projection device disclosed in authorization announcement number CN213333501U directly exposes the projector above the housing. The advantages of this device using the above technical solution are: it facilitates unobstructed projection of light and allows for movement and parking via retractable casters.

[0004] While the aforementioned patents have enabled the projector to be portable and project light directly, the projector is exposed to the outdoors and dust for a long time. The lens and body lack effective protective structures, making it difficult to protect the equipment while ensuring projection effect, thus affecting the lifespan of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a holographic water curtain projection device and its usage method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A holographic water curtain projection device, including

[0008] Mobile rack;

[0009] A base plate is fixedly connected to the top of the movable frame, and a top plate is adjustablely provided directly above the top of the base plate. A lifting mechanism is provided between the top plate and the base plate.

[0010] A protective box is fixedly connected to the top of the top plate, and a projector is fixedly connected to the middle of the inner bottom wall of the protective box;

[0011] An opening is formed through the front of the protective box, and an opening and closing mechanism is provided on the opening.

[0012] Furthermore, the lifting mechanism includes waist-shaped grooves that are transversely opened through the bottom plate and the top plate, and guide rods that are slidably fitted in the waist-shaped grooves. Connecting rod 1 is hinged to both ends of one side of the bottom plate, and connecting rod 2 is hinged to both ends of the same side of the top plate. Connecting rod 1 and connecting rod 2 are arranged crosswise, and their free ends are fixedly connected to the guide rods. Hinged seats 1 are fixedly connected to both ends of the rear top of the bottom plate. An electric push rod is hinged to the hinged seat 1. A drive rod is fixedly connected between the ends of the two connecting rods 2 away from the hinged seat 1. The output shaft of the electric push rod is rotatably connected to the drive rod through a fisheye joint.

[0013] Furthermore, the opening and closing mechanism includes guide rail two, which is vertically fixed to both ends of the inner wall of the front side of the protective box, and guide rail one, which is obliquely fixed to the inner walls of both sides of the top of the protective box and fixedly connected to guide rail two. Continuous guide grooves are provided on guide rail one and guide rail two. Protective plate one and protective plate two are respectively provided at the upper and lower ends of the inner side of the protective box near the opening. Rotating shafts are fixedly connected to the four corners of protective plate one and protective plate two. The ends of the rotating shafts pass through the guide grooves and are rotatably connected to rollers that roll in contact with guide rail one and guide rail two through bearings.

[0014] Furthermore, the opening and closing mechanism also includes a mounting plate fixedly connected to the outside of one top side of the protective plate. An electromagnetic brake is fixedly connected to one end of the inner side of the mounting plate, and a servo motor is fixedly connected to the outside of the electromagnetic brake. The output shaft of the servo motor passes through the electromagnetic brake and the guide groove and is fixedly connected to a gear. A rack that meshes with the gear is fixedly connected to the top wall of the protective box on the side near the gear.

[0015] Furthermore, the opening and closing mechanism further includes hinge seats two fixedly connected to the two ends of the top rear side of the protective plate one, and hinge seats three fixedly connected to the two ends of the top rear side of the protective plate two. A connecting rod three is hinged between the hinge seats two and the hinge seats three on the same side of the protective plate one and the protective plate two.

[0016] Furthermore, the included angle between guide rail one and guide rail two is 100° to 120°.

[0017] Furthermore, a heat dissipation window is provided through the rear side of the protective box, and a dustproof net is fixedly connected to the heat dissipation window. A horizontal water baffle is also fixedly connected to the upper outer side of the protective box located at the heat dissipation window. A mounting bracket is fixedly connected to the bottom wall of the protective box on the side near the heat dissipation window, and a fan is fixedly connected to the mounting bracket.

[0018] Furthermore, a front baffle is fixedly connected to the top front side of the protective box, and side baffles are also fixedly connected to both sides of the top of the protective box, with a drainage outlet formed between the side baffles and the front baffle.

[0019] Furthermore, the rear ends of the front baffle are sloped.

[0020] A method of using a holographic water curtain projection device includes the following steps:

[0021] Step S1: Move the device to the predetermined position and fix it in place using the movable frame;

[0022] Step S2: Activate the electric push rod, which drives the top plate to rise and fall through connecting rod one and connecting rod two, so that the protective box reaches the required projection height;

[0023] Step S3: Start the servo motor, which, through the meshing of gears and racks, drives the first and second protective plates to move upwards along the first and second guide rails, until they are completely retracted into the top of the protective box, exposing the opening.

[0024] Step S4: Activate the projector and project the holographic image onto the external water screen through the opening;

[0025] Step S5: After the projection ends, the servo motor rotates in the opposite direction, driving the first and second protective plates to descend along the guide rail to close the opening. Then, the electric push rod retracts to lower the top plate to the lowest position.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. This invention utilizes a servo motor, gears, racks, guide rails, and guide grooves to move protective plates one and two upwards and completely retract them into the top of the protective box. After the protective plates one and two are retracted, they do not block the projection light or occupy any space outside the box. Side-opening designs require space on both sides of the box, while flip-down designs extend outside the box, occupying ground or pedestrian space. Manually operated covers also require a place to be placed. However, with this structure, the outer perimeter of the box remains clean after retraction, and the projection light shines directly onto the water curtain from the opening without any obstruction. This solves the problems of existing protective methods that either block light, occupy space, or cause inconvenience at outdoor water curtain sites.

[0028] 2. This invention uses the electric push rod, connecting rod one and connecting rod two in combination to adjust the lifting height of the top plate and protective box. When in use, it can be raised to a suitable projection position, and when not in use, it can be lowered for easy movement and storage, thus solving the problem of poor on-site adaptability caused by the fixed height of the device. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall front view structure of a holographic water curtain projection device according to the present invention;

[0030] Figure 2 This is a schematic cross-sectional view of the overall structure of a holographic water curtain projection device according to the present invention;

[0031] Figure 3 This invention relates to a holographic water curtain projection device. Figure 1 Enlarged view of point A in the middle;

[0032] Figure 4 This invention relates to a holographic water curtain projection device. Figure 1 Enlarged view of point B in the middle;

[0033] Figure 5 This invention relates to a holographic water curtain projection device. Figure 2 Enlarged view of point C in the middle;

[0034] Figure 6 This invention relates to a holographic water curtain projection device. Figure 2 Enlarged diagram of point D in the middle.

[0035] In the diagram: 1. Movable frame; 2. Base plate; 3. Top plate; 4. Protective box; 5. Opening; 6. Waist-shaped groove; 7. Guide rod; 8. Linkage 2; 9. Hinge seat 1; 10. Electric push rod; 11. Drive rod; 12. Guide rail 2; 13. Guide rail 1; 14. Guide groove; 15. Protective plate 1; 16. Protective plate 2; 17. Rotating shaft; 18. Roller; 19. Mounting plate; 20. Servo motor; 21. Gear; 22. Rack; 23. Hinge seat 2; 24. Hinge seat 3; 25. Linkage 3; 26. Heat dissipation window; 27. Dustproof net; 28. Water baffle; 29. ​​Mounting frame; 30. Fan; 31. Front baffle; 32. Side baffle; 33. Drain outlet; 34. Projector; 35. Linkage 1. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-6 The present invention provides a technical solution:

[0038] A holographic water curtain projection device includes a movable frame 1, with casters fixedly connected to the four corners of the bottom of the movable frame 1, each caster having a locking mechanism; a base plate 2, fixedly connected to the top of the movable frame 1, with an adjustable top plate 3 positioned directly above the top of the base plate 2; a lifting mechanism between the top plate 3 and the base plate 2, the lifting mechanism including a waist-shaped groove 6 extending transversely through the base plate 2 and the top plate 3, and a guide rod 7 slidably fitted in the waist-shaped groove 6; connecting rod 35 hinged to both ends of one side of the base plate 2, and connecting rod 8 hinged to both ends of the top plate 3 on the same side; connecting rod 35 and connecting rod 8 are arranged crosswise, with their free ends fixedly connected to the guide rod 7; hinge seats 9 are fixedly connected to both ends of the rear top of the base plate 2, with an electric push rod 10 hinged to the hinge seat 9; a drive rod 11 is fixedly connected between the ends of the two connecting rods 8 away from the hinge seat 9; the output shaft of the electric push rod 10 is rotatably connected to the drive rod 11 via a fisheye connector. Connecting rod 35, the free end of connecting rod 1 is fixedly connected to guide rod 7 in the waist-shaped groove 6 of top plate 3, and connecting rod 2, the free end of connecting rod 8, is fixedly connected to guide rod 7 in the waist-shaped groove 6 of bottom plate 2. Connecting rod 1, 35 and connecting rod 2, 8 on the same side are hinged in the middle. Protective box 4 is fixedly connected to the top of top plate 3. Projector 34 is fixedly connected to the middle of the inner bottom wall of protective box 4. A heat dissipation window 26 is opened through the rear side of protective box 4. A dustproof net 27 is fixedly connected in the heat dissipation window 26. A horizontal baffle plate 28 is fixedly connected to the upper outer side of the protective box 4 located at the heat dissipation window 26. A mounting bracket 29 is fixedly connected to the bottom wall of the protective box 4 on the side near the heat dissipation window 26. A fan 30 is fixedly connected to the mounting bracket 29. A front baffle plate 31 is fixedly connected to the front top of the protective box 4. Side baffle plates 32 are fixedly connected to both sides of the top of the protective box 4. A drain outlet 33 is formed between the side baffle plate 32 and the front baffle plate 31. The two rear ends of the front baffle plate 31 are sloped.An opening 5 is formed through the front of the protective box 4. An opening and closing mechanism is provided on the opening 5. This mechanism includes two guide rails 12, each vertically fixed to both ends of the inner front wall of the protective box 4, and two guide rails 13, each obliquely fixed to the inner walls of the top two sides of the protective box 4 and fixedly connected to the two guide rails 12. The included angle between the guide rails 13 and 12 is 100°–120°. Continuous guide grooves 14 are formed on the guide rails 13 and 12. Protective plates 15 and 16 are respectively provided at the upper and lower ends of the inner side of the protective box 4 near the opening 5. Rotating shafts 17 are fixedly connected to the four corners of each of the protective plates 15 and 16. The ends of the rotating shafts 17 pass through the guide grooves 14 and are rotatably connected to the guide rails 13 and 12 via bearings. The opening and closing mechanism also includes a roller 18, and a mounting plate 19 fixedly connected to the outside of one side of the top of the protective plate 15. An electromagnetic brake is fixedly connected to one end of the inner side of the mounting plate 19, and a servo motor 20 is fixedly connected to the outside of the electromagnetic brake. The output shaft of the servo motor 20 passes through the electromagnetic brake and the guide groove 14 and is fixedly connected to a gear 21. A rack 22 that meshes with the gear 21 is fixedly connected to the top wall of the protective box 4 near the gear 21. The opening and closing mechanism further includes a second hinge seat 23 fixedly connected to the two ends of the top rear side of the protective plate 15, and a third hinge seat 24 fixedly connected to the two ends of the top rear side of the protective plate 26. A connecting rod 25 is hinged between the second hinge seat 23 and the third hinge seat 24 on the same side of the protective plate 15 and the protective plate 26.

[0039] Preferably, the output shaft of the servo motor 20 is keyed to the rotor of the electromagnetic brake, and the stator of the electromagnetic brake is fixedly connected to the mounting plate 19.

[0040] As a preferred option, projector 34 is a laser holographic projector.

[0041] As a preferred option, the protective box 4 is also equipped with a controller. The two electric push rods 10, the servo motor 20, the fan 30 and the projector 34 are all electrically connected to the controller. The controller is a programmable logic controller (PLC) or a microcontroller (MCU).

[0042] In this embodiment, through the coordinated use of servo motor 20, gear 21, rack 22, guide rail and guide groove 14, the protective plate 15 and the protective plate 26 can be moved upward and completely retracted into the top of the protective box 4. After the protective plate 15 and the protective plate 26 are retracted, they do not block the projection light, nor do they occupy any space outside the box. The side-opening type requires space on both sides of the box, and the flip-down type will extend outside the box and occupy the ground or pedestrian space. The manual cover also requires a place to put it. However, after this structure is retracted, the outside of the box is clean, and the projection light shines directly into the water curtain from the opening 5 without any obstruction. This solves the problem that the existing protection methods either block the light, occupy space, or get in the way at outdoor water curtain sites.

[0043] In this embodiment, the lifting height of the top plate 3 and the protective box 4 can be adjusted by the coordinated use of the electric push rod 10, the first connecting rod 35 and the second connecting rod 8. When in use, the height can be raised to a suitable projection position, and when not in use, it can be lowered for easy movement and storage, thus solving the problem of poor on-site adaptability caused by the fixed height of the device.

[0044] Working Principle: When this holographic water curtain projection device is working, it is first moved to the designated position by the moving frame 1. The electric push rod 10 is then activated. The output shaft of the electric push rod 10 pushes the drive rod 11 through the fisheye connector. The drive rod 11 drives the two connecting rods 8 to rotate. The connecting rods 8 drive the connecting rod 1 to rotate synchronously through the central hinge. The free ends of the connecting rods 1 and 2 slide in the waist-shaped grooves 6 of the bottom plate 2 and the top plate 3 respectively through the guide rods 7, thereby changing the cross angle and driving the top plate 3 to rise and fall relative to the bottom plate 2, so that the protective box 4 and the projector 34 on the top of the top plate 3 reach the required height. Then, the servo motor 20 is activated. The servo motor 20 drives the gear 21 to rotate. The gear 21 meshes with the rack 22, causing the servo motor 20 and the mounting plate 19 to move along the rack 22. The electromagnetic brake is used to lock the position when stopping. The mounting plate 19 drives the protective plate 15 to move. 15 rolls along the guide grooves 14 on guide rail 13 and guide rail 2 12 via pivot 17 and roller 18. At the same time, the protective plate 15 drives the protective plate 2 16 to move synchronously via hinge seat 23, connecting rod 3 25 and hinge seat 3 24. Since guide rail 13 is inclined and guide rail 2 12 is vertical, the protective plate 15 and protective plate 2 16 first move upward from the vertical state, and then flip along the inclined guide rail 13 to the inner side of the top of the protective box 4, thereby opening the opening 5. The projector 34 is started and projects the holographic image onto the external water curtain through the opening 5. During operation, the fan 30 runs and dissipates heat to the inside of the protective box 4 through the heat dissipation window 26. The dustproof net 27 blocks dust, and the water baffle 28 prevents the water flow above from directly entering the heat dissipation window 26. The liquid falling to the top of the protective box 4 is guided by the front baffle 31 and side baffle 32 and discharged through the drain outlet 33. The rear slope of the front baffle 31 helps to guide the flow.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A holographic water curtain projection device, characterized in that: include Mobile frame (1); The base plate (2) is fixedly connected to the top of the movable frame (1). A top plate (3) is adjustablely installed directly above the top of the base plate (2). A lifting mechanism is provided between the top plate (3) and the base plate (2). The protective box (4) is fixedly connected to the top of the top plate (3), and a projector (34) is fixedly connected to the middle of the inner bottom wall of the protective box (4). An opening (5) is provided on the front side of the protective box (4), and an opening and closing mechanism is provided on the opening (5).

2. The holographic water curtain projection device according to claim 1, characterized in that: The lifting mechanism includes a waist-shaped groove (6) that is horizontally opened on the bottom plate (2) and the top plate (3) respectively, and a guide rod (7) that is slidably fitted in the waist-shaped groove (6). A connecting rod (35) is hinged to both ends of one side of the bottom plate (2), and a connecting rod (8) is hinged to both ends of the same side of the top plate (3). The connecting rod (35) and the connecting rod (8) are arranged crosswise and their free ends are fixedly connected to the guide rod (7). A hinge seat (9) is fixedly connected to both ends of the rear top of the bottom plate (2). An electric push rod (10) is hinged to the hinge seat (9). A drive rod (11) is fixedly connected between the ends of the two connecting rods (8) away from the hinge seat (9). The output shaft of the electric push rod (10) is rotatably connected to the drive rod (11) through a fisheye connector.

3. The holographic water curtain projection device according to claim 1, characterized in that: The opening and closing mechanism includes guide rail two (12) which is vertically fixed to both ends of the front inner wall of the protective box (4), and guide rail one (13) which is obliquely fixed to the inner walls of the top two sides of the protective box (4) and fixed to the guide rail two (12). The guide rail one (13) and guide rail two (12) are provided with continuous guide grooves (14). The upper and lower ends of the inner side of the protective box (4) near the opening (5) are respectively provided with protective plate one (15) and protective plate two (16). The four corners of the protective plate one (15) and protective plate two (16) are fixedly connected with rotating shafts (17). The end of the rotating shaft (17) passes through the guide groove (14) and is rotatably connected to a roller (18) that rolls in contact with the guide rail one (13) and guide rail two (12) through a bearing.

4. A holographic water curtain projection device according to claim 3, characterized in that: The opening and closing mechanism also includes a mounting plate (19) fixedly connected to the outside of the top side of the protective plate (15). An electromagnetic brake is fixedly connected to one end of the inner side of the mounting plate (19), and a servo motor (20) is fixedly connected to the outside of the electromagnetic brake. The output shaft of the servo motor (20) passes through the electromagnetic brake and the guide groove (14) and is fixedly connected to a gear (21). A rack (22) that meshes with the gear (21) is fixedly connected to the top wall of the protective box (4) on the side close to the gear (21).

5. A holographic water curtain projection device according to claim 4, characterized in that: The opening and closing mechanism further includes a second hinge seat (23) fixedly connected to the two ends of the top rear side of the first protective plate (15), and a third hinge seat (24) fixedly connected to the two ends of the top rear side of the second protective plate (16). A connecting rod (25) is hinged between the second hinge seat (23) and the third hinge seat (24) on the same side of the first protective plate (15) and the second protective plate (16).

6. A holographic water curtain projection device according to claim 3, characterized in that: The included angle between the first guide rail (13) and the second guide rail (12) is 100° to 120°.

7. A holographic water curtain projection device according to claim 1, characterized in that: The protective box (4) has a heat dissipation window (26) through the rear side. A dustproof net (27) is fixedly connected in the heat dissipation window (26). A horizontal water baffle (28) is also fixedly connected to the upper outer side of the protective box (4) at the heat dissipation window (26). A mounting bracket (29) is fixedly connected to the bottom wall of the protective box (4) on the side close to the heat dissipation window (26). A fan (30) is fixedly connected to the mounting bracket (29).

8. A holographic water curtain projection device according to claim 1, characterized in that: A front baffle (31) is fixedly connected to the top front side of the protective box (4), and side baffles (32) are also fixedly connected to both sides of the top of the protective box (4). A drain outlet (33) is formed between the side baffles (32) and the front baffles (31).

9. A holographic water curtain projection device according to claim 8, characterized in that: The rear ends of the front baffle (31) are sloped.

10. The method of using a holographic water curtain projection device according to claims 1-9, characterized in that: Includes the following steps: Step S1: Move the device to the predetermined position and fix it using the movable frame (1); Step S2: Start the electric push rod (10), and drive the top plate (3) to rise and fall through the connecting rod one (35) and connecting rod two (8) so that the protective box (4) reaches the required projection height; Step S3: Start the servo motor (20), which meshes with the rack (22) through the gear (21) to drive the first protective plate (15) and the second protective plate (16) to move upward along the first guide rail (13) and the second guide rail (12) and completely retract into the top of the protective box (4), exposing the opening (5). Step S4: Activate the projector (34) to project the holographic image onto the external water screen through the opening (5); Step S5: After the projection is completed, the servo motor (20) rotates in the opposite direction, driving the first protective plate (15) and the second protective plate (16) to descend along the guide rail, closing the opening (5). Then the electric push rod (10) retracts to lower the top plate (3) to the lowest position.

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