Ground projection display device for exhibition

Abstract

The utility model belongs to the technical field of projection equipment, and discloses a ground projection display device for exhibition, which comprises a ground projector, and a lens protection mechanism is detachably arranged at the bottom, close to a lens, of the ground projector. The lens protection mechanism comprises a protection cover, a movable cover plate, a first fixing ring, a second fixing ring, a rack, a first gear and a second gear, the first fixing ring and the second fixing ring are arranged at one end in the protection cover, and the first fixing ring is located on the inner side of the second fixing ring; according to the utility model, the lens protection mechanism which can be opened automatically is arranged, and the plurality of movable cover plates are driven to move synchronously through the cooperation of the gear, the gear ring and the rack, so that the lens is covered and exposed, the lens is protected when the lens is not used, and the lens protection mechanism does not need to be opened and closed manually; and a ground projection device with a relatively high installation position can be conveniently installed to protect the lens.

Description

Technical Field

[0001] The utility model belongs to the technical field of projection equipment, and in particular relates to a floor projection display device for exhibitions. Background Art

[0002] Ground projection is a brand-new projection display method. Using a high-lumen projector, images are projected onto the ground. These images can be common landscapes such as water, fallen leaves, or snow. When someone walks through the projection area, the image on the ground undergoes magical changes based on their position. Ground projection is a form of VR (virtual reality) technology, making visitors feel as if they are in a real environment and experiencing an immersive experience. Ground projection effects can also be customized according to the needs of the end user.

[0003] A Chinese patent application numbered CN202320467580.X mentions a ground projection device for an advertising design exhibition. A lens protection cover connected to the device via a connecting belt can be used to protect the lens when not in use to prevent lens wear. However, since the ground projection device needs to be installed at a higher position from the ground in order to project an image onto the ground, the position of the lens protection cover connected to the ground projection device is also higher, making it inconvenient for the user to manually close the lens protection cover on the lens of the ground projection device, and thus making it difficult to achieve the effect of protecting the lens. Utility Model Content

[0004] The purpose of the utility model is to provide a floor projection display device for exhibitions, so as to solve the problem in the above background technology that the installation position is too high and it is inconvenient to manually close the lens protection cover on the lens and thus the lens cannot be protected.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a conference and exhibition ground projection display device, comprising a ground projector, wherein the ground projector is detachably provided with a lens protection mechanism near the bottom of the lens, the lens protection mechanism comprising a protective cover, a movable cover, a first fixing ring, a second fixing ring, a rack, a first gear and a second gear, the first fixing ring and the second fixing ring are arranged at one end inside the protective cover, and the first fixing ring is located on the inner side of the second fixing ring, the racks are distributed in an annular array on the first fixing ring and the second fixing ring, the first gears are distributed in an annular array between the first fixing ring and the second fixing ring, and the upper end of the first gear is meshed with the rack, the interior of the second fixing ring is provided with a gear ring meshed with the lower end of the first gear, the movable cover is arranged on the top of the rack, and the gear ring is meshed with the second gear on the side away from the first gear.

[0006] Preferably, the second gear is connected to the output shaft of the micro motor.

[0007] Preferably, the protective cover is screwed to the ground projector via a thread, and a through hole corresponding to the lens is provided at one end of the protective cover away from the ground projector.

[0008] Preferably, the movable cover plate is a fan-shaped structure, and there are three movable cover plates in total, and the three movable cover plates cover the through hole after being spliced together.

[0009] Preferably, a sliding bar is provided at one end of the rack away from the tooth groove, and the rack is slidably connected to the first fixing ring and the second fixing ring respectively through the sliding bar.

[0010] Preferably, limit blocks are provided at both ends of the slide bar.

[0011] Preferably, the rack is located above the gear ring.

[0012] Preferably, a movable frame is further included, wherein the bottoms of both ends of the movable frame are fixedly connected to fixed frames, and the inner side of the fixed frame is rotatably connected to the ground projector through a rotating shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The present invention is provided with a lens protection mechanism that can be opened automatically. The cooperation of the gear, the gear ring and the rack drives the synchronous movement of multiple movable covers, thereby covering and exposing the lens, thereby protecting the lens when not in use. The lens protection mechanism does not need to be opened and closed manually, which is convenient for protecting the lens of a ground projection device installed at a higher position.

[0015] (2) The lens protection mechanism of the present invention is detachably connected to the floor projector. When the floor projector needs to be repaired, the lens protection mechanism can be easily removed from the floor projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure when the movable cover plate of the utility model completely covers the through hole;

[0018] Figure 3 This is a structural diagram of the lens protection mechanism of the utility model in the open state;

[0019] Figure 4 This is a schematic diagram of the structure of the rack and the fixed ring in cooperation with each other in the utility model;

[0020] In the figure: 1. Floor projector; 2. Protective cover; 3. Movable cover; 4. First fixing ring; 5. Second fixing ring; 6. Rack; 7. First gear; 8. Second gear; 9. Gear ring; 10. Through hole; 11. Slide; 12. Movable frame; 13. Fixed frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1-4 As shown, the utility model provides a technical solution: a conference and exhibition ground projection display device, comprising a ground projector 1, a ground projector 1, a lens protection mechanism detachably provided at the bottom near the lens of the ground projector 1, the lens protection mechanism comprising a protective cover 2, a movable cover 3, a first fixing ring 4, a second fixing ring 5, a rack 6, a first gear 7 and a second gear 8, the first fixing ring 4 and the second fixing ring 5 are arranged at one end inside the protective cover 2, and the first fixing ring 4 is located on the inner side of the second fixing ring 5, the racks 6 are distributed in an annular array on the first fixing ring 4 and the second fixing ring 5, the first gear 7 is distributed in an annular array between the first fixing ring 4 and the second fixing ring 5, and the upper end of the first gear 7 is meshed with the rack 6, the interior of the second fixing ring 5 is provided with a gear ring 9 meshed with the lower end of the first gear 7, the movable cover 3 is arranged on the top of the rack 6, and the gear ring 9 is meshed with the second gear 8 on the side away from the first gear 7;

[0023] The inner wall and the outer wall of the gear ring 9 are both provided with meshing teeth, which facilitate the transmission of the circular motion of the second gear 8 to the first gear 7.

[0024] The second gear 8 is connected to the output shaft of the micro motor, and the micro motor is electrically connected to an external remote control device to achieve remote control of the micro motor;

[0025] The protective cover 2 is screwed to the ground projector 1 through a thread, and a through hole 10 corresponding to the lens is formed at one end of the protective cover 2 away from the ground projector 1;

[0026] When the lens needs to be protected, the micro motor drives the second gear 8 to rotate, the second gear 8 drives the gear ring 9 to rotate, the gear ring 9 drives the first gear 7 to rotate, the first gear 7 drives the rack 6 to move, thereby driving the movable cover 3 to move closer to and away from the center position of the through hole 10, and then the movable cover 3 covers and exposes the through hole 10, thereby automatically protecting the lens.

[0027] The movable cover plate 3 is a fan-shaped structure, and there are three movable cover plates 3 in total. The three movable cover plates 3 are spliced together to cover the through hole 10;

[0028] A slide bar 11 is provided at one end of the rack 6 away from the tooth groove, and the rack 6 is slidably connected to the first fixing ring 4 and the second fixing ring 5 respectively through the slide bar 11;

[0029] Limit blocks are provided at both ends of the slide bar 11, which ensure that the slide bar 11 does not separate from the first fixing ring 4 and the second fixing ring 5;

[0030] The rack 6 is located above the gear ring 9;

[0031] Furthermore, the device further comprises a movable frame 12 , the bottoms of both ends of the movable frame 12 are fixedly connected with fixed frames 13 , and the inner side of the fixed frame 13 is rotatably connected to the ground projector 1 via a rotating shaft.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conference and exhibition ground projection display device, comprising a ground projector (1), wherein the ground projector (1) is detachably provided with a lens protection mechanism at the bottom near the lens, wherein the lens protection mechanism comprises a protective cover (2), a movable cover plate (3), a first fixing ring (4), a second fixing ring (5), a rack (6), a first gear (7) and a second gear (8), wherein the first fixing ring (4) and the second fixing ring (5) are provided at one end inside the protective cover (2), and the first fixing ring (4) is located inside the second fixing ring (5), wherein ... The racks (6) are distributed in an annular array on the first fixing ring (4) and the second fixing ring (5); the first gears (7) are distributed in an annular array between the first fixing ring (4) and the second fixing ring (5); the upper end of the first gear (7) is meshed with the rack (6); a gear ring (9) meshed with the lower end of the first gear (7) is provided inside the second fixing ring (5); the movable cover plate (3) is provided on the top of the rack (6); and the gear ring (9) is meshed with the second gear (8) on a side away from the first gear (7).

2. The exhibition floor projection display device according to claim 1, characterized in that: The second gear (8) is connected to the output shaft of the micro motor.

3. The exhibition floor projection display device according to claim 1, characterized in that: The protective cover (2) is screwed to the ground projector (1) via a thread, and a through hole (10) corresponding to the lens is provided at one end of the protective cover (2) away from the ground projector (1).

4. The exhibition floor projection display device according to claim 3, characterized in that: The movable cover plate (3) is a fan-shaped structure, and a total of three movable cover plates (3) are provided. The three movable cover plates (3) cover the through hole (10) after being spliced together.

5. The exhibition floor projection display device according to claim 1, characterized in that: A sliding bar (11) is provided at one end of the rack (6) away from the tooth groove, and the rack (6) is slidably connected to the first fixing ring (4) and the second fixing ring (5) respectively through the sliding bar (11).

6. The exhibition floor projection display device according to claim 5, characterized in that: Limit blocks are provided at both ends of the slide bar (11).

7. The exhibition floor projection display device according to claim 2, characterized in that: The rack (6) is located above the gear ring (9).

8. The exhibition floor projection display device according to claim 1, characterized in that: It also includes a movable frame (12), the bottoms of both ends of the movable frame (12) are fixedly connected to fixed frames (13), and the inner side of the fixed frame (13) is rotatably connected to the ground projector (1) through a rotating shaft.

Images