Holographic projection aerial display

Abstract

The present invention belongs to the technical field of holographic displays, specifically a holographic projection type aerial display, comprising a shell, a bracket plate fixedly connected to the top of the shell, a motor fixedly connected to the bracket plate, and two connecting plates fixedly connected to the bottom end of the shell; through the structural design of the sponge cover, when the holographic interactive display screen needs to be stored in the shell, the motor is started to drive the threaded rod to rotate, and the threaded rod can drive the lifting plate and the cleaning interactive display screen to move upward, and at the same time, the threaded rod drives the second rotating shaft to rotate through the first bevel gear and the second bevel gear, the second rotating shaft can drive the second gear and the first rotating shaft to rotate, and the first rotating shaft drives the sponge cover to rotate, and during the rising process of the holographic interactive display screen, the sponge cover will continuously rotate, and the sponge cover can clean the dust on the surface of the holographic interactive display screen, thereby realizing the function of automatically cleaning the holographic interactive display screen during the storage process.

Description

Technical Field

[0001] The present invention relates to the technical field of holographic displays, in particular to a holographic projection type aerial display. Background Art

[0002] Holographic projection technology, also known as virtual imaging technology, is a technology that uses the principles of interference and diffraction to record and reproduce the real three-dimensional image of an object. The holographic image of holographic projection is projected onto a display set in the air.

[0003] The existing display includes a holographic interactive display screen, a storage box and other structures. During use, the holographic projection device projects the holographic image onto the holographic interactive display screen. After use, the holographic interactive display screen is stored in the storage box through the driving device.

[0004] When a holographic interactive display screen has been used for a long time, a large amount of dust will adhere to its surface, and the dust will be brought into the storage box when it is stored. However, current displays cannot clean the surface of the holographic interactive display screen. Therefore, a holographic projection aerial display is proposed to address the above problem. Summary of the Invention

[0005] In order to make up for the deficiency of the prior art, the problem that the current display cannot clean the surface of the holographic interactive display screen, the present invention proposes a holographic projection type aerial display.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the holographic projection type aerial display described in the present invention includes a shell, the top of the shell is fixedly connected to a bracket plate, the bracket plate is fixedly connected to a motor, the bottom end of the shell is fixedly connected to two connecting plates, and threaded rods are rotatably connected between the two connecting plates and the top of the shell through bearings, the top of one of the threaded rods is fixedly connected to the output shaft of the motor, the tops of the two threaded rods are fixedly connected to pulleys, a transmission belt is provided above the shell, the two pulleys are connected through transmission belt transmission, the surfaces of the two threaded rods are threadedly connected to a lifting plate, the bottom of the lifting plate is fixedly connected to a holographic interactive display screen, and a cleaning component is provided on the shell, and the cleaning component is used to clean the surface of the holographic interactive display screen.

[0007] Preferably, the cleaning assembly includes four guide rods slidably inserted on the shell, one end of the four guide rods is fixedly connected to a circular plate, a first spring is fixedly connected between the circular plate and the shell, the first spring is sleeved on the outside of the guide rod, and the other end of the corresponding two guide rods is fixedly connected to a U-shaped plate, the two U-shaped plates are rotatably connected to a first rotating shaft through a bearing, the surface of the first rotating shaft is fixedly connected to a sponge cover, and the distance between the two sponge covers is less than the thickness of the holographic interactive display screen.

[0008] The transmission gear of the present invention is a gear which is connected to the first gear of the driving member and the gear is connected with the gear of the driving member, and the gear is connected with the gear of the driving member by the spring which is fixed to the first gear and the gear is connected with the gear of the driving member. The other end of the rotating shaft is fixedly connected to the third sprocket, and the inner wall of the shell is fixedly connected to the second fixed plate, and the second fixed plate is rotatably connected to the circular plate through a bearing, and the outer wall of the circular plate is fixedly connected to the annular sprocket, and a second chain is provided above the connecting plate, and the annular sprocket and the third sprocket are connected through a second chain transmission, and the inner wall of the circular plate is fixedly connected to the ring gear, and the fourth rotating shaft is rotatably connected to the U-shaped plate through a bearing, and one end of the fourth rotating shaft is fixedly connected to the first gear, and the first gear is meshed with the ring gear, and the two ends of the first rotating shaft are fixedly connected to the second gear, and the second gear is meshed with the first gear.

[0009] Preferably, an L-shaped plate is fixed to the U-shaped plate, a triangular block is fixed to one end of the L-shaped plate, the triangular block is provided with two inclined surfaces, a semicircular block is fixed to the lifting plate, and the inclined surface of the triangular block is located on the trajectory of the semicircular block moving with the lifting plate.

[0010] Preferably, a third fixing plate is fixed to the bottom of the U-shaped plate, a scraper is fixed to the bottom end of the third fixing plate, and one end of the scraper is in close contact with the sponge sleeve.

[0011] Preferably, two fixed blocks are fixed to the bottom of the shell, a closing plate is rotatably connected between the two fixed blocks via a pin, a second spring is fixed between the two closing plates and the inner wall of the shell, and the second spring is in a stretched state.

[0012] Preferably, the closing plate is provided with two notches, and rollers are rotatably connected to the notches via pins, and the four rollers are in contact with the surface of the holographic interactive display screen.

[0013] Preferably, gaps are provided between the holographic interactive display screen and the closing plates on both sides, and the gaps are used to allow dust to leave the shell.

[0014] Preferably, the surface of the third rotating shaft is fixed with a rotating plate, a rotating column is fixed on the rotating plate, and two fixed plates are fixed on the top of the connecting plate. The top of the fixed plate is located on the trajectory of the rotating column rotating around the third rotating shaft. A connecting plate is fixed on the fixed plate, the fixed plate and the connecting plate are elastic, and one end of the connecting plate is fixed with an impact ball.

[0015] Preferably, four circular holes are provided on the shell, and the guide rods slide through the circular holes.

[0016] The present invention is beneficial in that:

[0017] 1. The present invention adopts the structural design of the sponge cover. When the holographic interactive display screen needs to be stored in the housing, the motor is started to drive the threaded rod to rotate. The threaded rod can drive the lifting plate and the cleaning interactive display screen to move upward. At the same time, the threaded rod drives the second rotating shaft to rotate through the first bevel gear and the second bevel gear. The second rotating shaft can drive the second gear and the first rotating shaft to rotate. The first rotating shaft drives the sponge cover to rotate. During the rising process of the holographic interactive display screen, the sponge cover will continuously rotate. The sponge cover can clean the dust on the surface of the holographic interactive display screen, realizing the function of automatically cleaning the holographic interactive display screen during the storage process, solving the problem that the current display cannot clean the surface of the holographic interactive display screen.

[0018] 2. The present invention adopts the structural design of the triangular block. During the rising process of the holographic interactive display screen, the semicircular block on the lifting plate will contact the inclined surface of the triangular block. The semicircular block will compel the triangular block to move. The triangular block can drive the sponge cover to move to avoid the rising action of the holographic interactive display screen. After the avoidance is completed, under the action of the first spring, the sponge cover will contact the surface of the holographic interactive display screen to clean the holographic interactive display screen. By setting a closing plate, when the holographic interactive display screen is completely stored in the shell, under the action of the second spring, the two closing plates will close the bottom of the shell to prevent dust from entering the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram of the internal structure of the housing of the present invention;

[0022] Figure 3 This is one of the partial three-dimensional structural diagrams of the present invention;

[0023] Figure 4 This is the second schematic diagram of the partial three-dimensional structure of the present invention;

[0024] Figure 5It is a partial top view schematic diagram of the present invention;

[0025] Figure 6 This is a schematic diagram of the closing plate structure of the present invention;

[0026] Figure 7 Schematic diagram of the gap structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the shell structure of the present invention.

[0028] In the figure: 1. Housing; 2. Bracket plate; 3. Motor; 4. Connecting plate; 5. Threaded rod; 6. Pulley; 7. Drive belt; 8. Lifting plate; 9. Holographic interactive display screen; 10. Guide rod; 11. Circular plate; 12. U-shaped plate; 13. First rotating shaft; 14. Sponge cover; 15. First fixing plate; 16. Second rotating shaft; 17. First bevel gear; 18. Second bevel gear; 19. First sprocket; 20. Third rotating shaft; 21. Second sprocket; 22. First chain; 23. Third sprocket; 24. Second fixing plate 25. Annular plate; 26. Annular sprocket; 27. Second chain; 28. Annular gear; 29. ​​Fourth rotating shaft; 30. First gear; 31. Second gear; 32. L-shaped plate; 33. Triangular block; 34. Semicircular block; 35. Third fixed plate; 36. Scraper; 37. Fixed block; 38. Closing plate; 39. Second spring; 40. Notch; 41. Roller; 42. Slit; 43. Rotating plate; 44. Rotating column; 45. Fixed plate; 46. Connecting plate; 47. Impact ball; 48. Round hole; 49. First spring. DETAILED DESCRIPTION

[0029] 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. 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.

[0030] See also Figures 1-8As shown, the holographic projection type aerial display comprises a shell 1, a motor 3, a threaded rod 5, a lifting plate 8 and a holographic interactive display screen 9. The shell 1 is mounted on a ceiling or a wall through a mounting bracket. The top of the shell 1 is fixedly connected to a bracket plate 2, and the bracket plate 2 is fixedly connected to a motor 3. The bottom end of the shell 1 is fixedly connected to two connecting plates 4. The two connecting plates 4 are rotatably connected to the top of the shell 1 by threaded rods 5 through bearings. The top end of one of the threaded rods 5 is fixedly connected to the output shaft of the motor 3, and the top ends of the two threaded rods 5 are fixedly connected to pulleys 6. A transmission belt 7 is provided above the shell 1. The two pulleys The pulley 6 is connected through the transmission belt 7. The surfaces of the two threaded rods 5 are threadedly connected with a lifting plate 8. The bottom of the lifting plate 8 is fixedly connected to the holographic interactive display screen 9. When the holographic interactive display screen 9 is used up, it needs to be stored. The motor 3 is started. The motor 3 drives the two threaded rods 5 to rotate through the pulley 6 and the transmission belt 7. The threaded rod 5 drives the lifting plate 8 to move upward. The lifting plate 8 drives the holographic interactive display screen 9 to move upward into the shell 1. The holographic projection equipment can project a holographic image onto the holographic interactive display screen 9. A cleaning component is provided on the shell 1, and the cleaning component is used to clean the surface of the holographic interactive display screen 9.

[0031] The cleaning assembly includes four guide rods 10 slidably inserted on the shell 1, and one end of the four guide rods 10 is fixedly connected to a circular plate 11, and a first spring 49 is fixedly connected between the circular plate 11 and the shell 1. The first spring 49 is sleeved on the outside of the guide rod 10, and the other end of the corresponding two guide rods 10 is fixedly connected to a U-shaped plate 12. The two U-shaped plates 12 are rotatably connected to the first rotating shaft 13 through bearings, and the surface of the first rotating shaft 13 is fixedly connected to a sponge cover 14. The distance between the two sponge covers 14 is less than the thickness of the holographic interactive display screen 9. After the lifting plate 8 passes through the two sponge covers 14 smoothly, under the action of the first spring 49, the two sponge covers 14 move toward the middle, and the two sponge covers 14 are in contact with the surface of the holographic interactive display screen 9, and the sponge covers 14 clean the holographic interactive display screen 9.

[0032] The two connecting plates 4 are both fixed with a first fixed plate 15, and the first fixed plate 15 is rotatably connected to a second rotating shaft 16 through a bearing. One end of the second rotating shaft 16 is fixed with a first bevel gear 17, and the bottom end surfaces of the two threaded rods 5 are fixed with a second bevel gear 18. During the rotation of the threaded rod 5, the threaded rod 5 can drive the second bevel gear 18 to rotate, and the second bevel gear 18 drives the first bevel gear 17 to rotate, and the first bevel gear 17 drives the second rotating shaft 16 to rotate, and the first bevel gear 17 is meshed with the second bevel gear 18. The other end of the second rotating shaft 16 is fixed with a first sprocket 19, and the second rotating shaft 16 drives the first sprocket 19 to rotate. The plate 15 is rotatably connected to two third rotating shafts 20 through bearings, one end of the third rotating shaft 20 is fixedly connected to a second sprocket 21, and a first chain 22 is provided on the first fixed plate 15. The first sprocket 19 is connected to the two second sprockets 21 through the first chain 22. The first sprocket 19 drives the two second sprockets 21 to rotate through the first chain 22. The other end of the two third rotating shafts 20 is fixedly connected to a third sprocket 23. The second sprocket 21 drives the third rotating shaft 20 to rotate, and the third rotating shaft 20 drives the third sprocket 23 to rotate. The inner wall of the housing 1 is fixedly connected to a second fixed plate 24, and a circular plate 25 is rotatably connected to the second fixed plate 24 through a bearing. The outer wall of the plate 25 is fixedly connected to an annular sprocket 26, and a second chain 27 is provided above the connecting plate 4. The third sprocket 23 drives the annular sprocket 26 to rotate through the second chain 27, and the annular sprocket 26 drives the annular plate 25 to rotate. The annular sprocket 26 and the third sprocket 23 are connected by the second chain 27. The inner wall of the annular plate 25 is fixedly connected to a ring gear 28, and the annular plate 25 drives the annular gear 28 to rotate. The U-shaped plate 12 is rotatably connected to a fourth rotating shaft 29 through a bearing. One end of the fourth rotating shaft 29 is fixedly connected to a first gear 30. The first gear 30 is meshed with the annular gear 28, and the annular gear 28 drives the first gear 30 to rotate. The first The two ends of the rotating shaft 13 are fixedly connected with the second gear 31, and the second gear 31 is engaged with the first gear 30. The first gear 30 drives the second gear 31 to rotate, and the second gear 31 drives the first rotating shaft 13 and the sponge cover 14 to rotate. The sponge cover 14 can rotate during the upward movement of the holographic interactive display screen 9 to enhance the cleaning effect of the holographic interactive display screen 9. The sponge cover 14 will not always clean the holographic interactive display screen 9 through a fixed position. During the avoidance process, the first gear 30 will move in the circular plate 25. After the avoidance is completed, the first gear 30 returns to its original position. Since the first gear 30 has fewer teeth, the first gear 30 can easily re-engage with the ring gear 28.

[0033] The U-shaped plate 12 is fixedly connected to an L-shaped plate 32, and one end of the L-shaped plate 32 is fixedly connected to a triangular block 33. The triangular block 33 is provided with two inclined surfaces. The lifting plate 8 is fixedly connected to a semicircular block 34. The inclined surface of the triangular block 33 is located on the trajectory of the semicircular block 34 moving with the lifting plate 8. During the movement of the lifting plate 8, the lifting plate 8 drives the semicircular block 34 to move upward. The semicircular block 34 will contact the inclined surface of the triangular block 33. The semicircular block 34 can press the triangular blocks 33 on both sides to move to both sides. The triangular block 33 drives the L-shaped plate 32 and the U-shaped plate 12 to move, and the U-shaped plate 12 drives the sponge cover 14 to move. The first spring 49 is stretched, and the two sponge covers 14 move to both sides to avoid the lifting plate 8 and will not hinder the movement of the lifting plate 8.

[0034] A third fixing plate 35 is fixed to the bottom of the U-shaped plate 12, and a scraper 36 is fixed to the bottom end of the third fixing plate 35. One end of the scraper 36 is in close contact with the sponge cover 14. During the cleaning process of the sponge cover 14, the scraper 36 can scrape off the dust on the sponge cover 14 to prevent the dusty sponge cover 14 from continuously cleaning the holographic interactive display screen 9.

[0035] Two fixed blocks 37 are fixed to the bottom of the shell 1, and a closing plate 38 is rotatably connected between the two fixed blocks 37 via a pin shaft. A second spring 39 is fixed between the two closing plates 38 and the inner wall of the shell 1. The second spring 39 is in a stretched state. When the holographic interactive display screen 9 is stored, the roller 41 continues to roll on the surface of the holographic interactive display screen 9. When the holographic interactive display screen 9 is completely entered into the shell 1, the two closing plates 38 close the bottom of the shell 1 under the action of the second spring 39.

[0036] Two slots 40 are provided on the closing plate 38, and rollers 41 are rotatably connected in the slots 40 via pins. The four rollers 41 are in contact with the surface of the holographic interactive display screen 9. The contact between the rollers 41 and the holographic interactive display screen 9 can prevent a large friction between the closing plate 38 and the holographic interactive display screen 9.

[0037] Gaps 42 are provided between the holographic interactive display screen 9 and the closing plates 38 on both sides. The gaps 42 are used to allow dust to leave the housing 1 . The fallen dust will fall on the closing plates 38 and will fall out of the housing 1 through the gaps 42 .

[0038] The surfaces of the third rotating shaft 20 are all fixedly connected to the rotating plate 43, and the rotating plate 43 is fixedly connected to the rotating column 44. During the rotation of the third rotating shaft 20, the third rotating shaft 20 can drive the rotating plate 43 and the rotating column 44 to rotate. The top of the connecting plate 4 is fixedly connected to two fixing pieces 45, and the top end of the fixing piece 45 is located on the trajectory of the rotating column 44 rotating around the third rotating shaft 20. The fixing piece 45 is fixedly connected to a connecting piece 46. The fixing piece 45 and the connecting piece 46 are elastic. One end of the connecting piece 46 is fixedly connected to an impact ball 47, and the rotating column 44 will contact the fixing piece 45. The rotating column 44 can press the top end of the fixing piece 45, and the fixing piece 45 is bent and deformed. When the rotating column 44 is not in contact with the fixing piece 45, the fixing piece 45 will be reset under the action of elasticity, and the fixing piece 45 will drive the impact ball 47 to impact the connecting plate 4. The impact generates vibration, and the vibration can make the dust dropped on the closing plate 38 slide down quickly.

[0039] The housing 1 is provided with four circular holes 48 , and the guide rod 10 slides through the circular holes 48 . During the movement of the sponge cover 14 and the U-shaped plate 12 , the guide rod 10 slides in the circular holes 48 to limit the sponge cover 14 and the U-shaped plate 12 in the horizontal direction.

[0040] Working principle: When in use, the shell 1 is installed on the ceiling or wall through the mounting bracket. The holographic projection device can project the holographic image onto the holographic interactive display screen 9. When the holographic interactive display screen 9 is used up, it needs to be stored and the motor 3 is started. The motor 3 drives the two threaded rods 5 to rotate through the pulley 6 and the transmission belt 7. The threaded rod 5 drives the lifting plate 8 to move upward. The lifting plate 8 drives the holographic interactive display screen 9 to move upward into the shell 1. During the movement of the lifting plate 8, the lifting plate 8 drives the semicircular block 34 to move upward. The semicircular block 34 will contact the inclined surface of the triangular block 33. The semicircular block 34 can press the triangular blocks 33 on both sides to move to both sides. The triangular block 33 drives the L-shaped plate 32 and the U-shaped plate 12 to move, and the U-shaped plate 12 drives the sponge cover 14 moves, the first spring 49 is stretched, and the two sponge covers 14 move to both sides to avoid the lifting plate 8, and will not hinder the movement of the lifting plate 8. After the lifting plate 8 passes through the two sponge covers 14 smoothly, under the action of the first spring 49, the two sponge covers 14 move to the middle, and the two sponge covers 14 are in contact with the surface of the holographic interactive display screen 9. During the rotation of the threaded rod 5, the threaded rod 5 can drive the second bevel gear 18 to rotate, the second bevel gear 18 drives the first bevel gear 17 to rotate, the first bevel gear 17 drives the second rotating shaft 16 to rotate, the second rotating shaft 16 drives the first sprocket 19 to rotate, the first sprocket 19 drives the two second sprockets 21 to rotate through the first chain 22, the second sprocket 21 drives the third rotating shaft 20 to rotate, and the third rotating shaft 20 drives The third sprocket 23 is driven to rotate, and the third sprocket 23 drives the annular sprocket 26 to rotate through the second chain 27, and the annular sprocket 26 drives the circular plate 25 to rotate, and the circular plate 25 drives the annular gear 28 to rotate, and the annular gear 28 drives the first gear 30 to rotate, and the first gear 30 drives the second gear 31 to rotate, and the second gear 31 drives the first rotating shaft 13 and the sponge cover 14 to rotate, and the sponge cover 14 can rotate during the upward movement of the holographic interactive display screen 9 to enhance the cleaning effect of the holographic interactive display screen 9. The sponge cover 14 will not always clean the holographic interactive display screen 9 through a fixed position. During the avoidance process, the first gear 30 will move in the circular plate 25. After the avoidance is completed, the first gear 30 returns to its original position. The number of teeth is small, and the first gear 30 is easy to re-engage with the ring gear 28. During the cleaning process of the sponge cover 14, the scraper 36 can scrape off the dust on the sponge cover 14 to prevent the sponge cover 14 with dust from continuously cleaning the holographic interactive display screen 9. The fallen dust will fall on the closing plate 38 and fall out of the shell 1 through the gap 42. During the process of storing the holographic interactive display screen 9, the roller 41 continues to roll on the surface of the holographic interactive display screen 9. When the holographic interactive display screen 9 is completely entered into the shell 1, the two closing plates 38 close the bottom of the shell 1 under the action of the second spring 39. During the rotation of the third rotating shaft 20, the third rotating shaft 20 can drive the rotating plate 43 and the rotating column 44 to rotate, and the rotating column 44 will contact the fixing piece 45.The rotating column 44 can press the top of the fixed plate 45, causing the fixed plate 45 to bend and deform. When the rotating column 44 and the fixed plate 45 are no longer in contact, the fixed plate 45 will return to its original position under the action of elasticity. The fixed plate 45 will drive the impact ball 47 to impact the connecting plate 4, and the impact will generate vibration. The vibration can make the dust that falls on the closing plate 38 slide down quickly.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A holographic projection type aerial display, comprising a housing (1), wherein a bracket plate (2) is fixedly connected to the top of the housing (1), a motor (3) is fixedly connected to the bracket plate (2), two connecting plates (4) are fixedly connected to the bottom end of the housing (1), and threaded rods (5) are rotatably connected between the two connecting plates (4) and the top of the housing (1) via bearings, characterized in that: The top end of one of the threaded rods (5) is fixedly connected to the output shaft of the motor (3), the top ends of the two threaded rods (5) are fixedly connected to a pulley (6), a transmission belt (7) is provided above the housing (1), the two pulleys (6) are connected in transmission via the transmission belt (7), the surfaces of the two threaded rods (5) are threadedly connected to a lifting plate (8), the bottom of the lifting plate (8) is fixedly connected to a holographic interactive display screen (9), and a cleaning component is provided on the housing (1), and the cleaning component is used to clean the surface of the holographic interactive display screen (9); The cleaning assembly comprises four guide rods (10) slidably inserted on the housing (1), one end of each of the four guide rods (10) is fixedly connected to a circular plate (11), a first spring (49) is fixedly connected between the circular plate (11) and the housing (1), the first spring (49) is sleeved on the outside of the guide rods (10), and the other ends of two corresponding guide rods (10) are fixedly connected to a U-shaped plate (12), the two U-shaped plates (12) are rotatably connected to a first rotating shaft (13) through a bearing, the surface of each of the first rotating shafts (13) is fixedly connected to a sponge sleeve (14), and the distance between the two sponge sleeves (14) is less than the thickness of the holographic interactive display screen (9); The two connecting plates (4) are both fixedly connected with a first fixed plate (15), and the first fixed plate (15) is rotatably connected with a second rotating shaft (16) through a bearing, and one end of the second rotating shaft (16) is fixedly connected with a first bevel gear (17), and the bottom end surfaces of the two threaded rods (5) are fixedly connected with a second bevel gear (18), and the first bevel gear (17) is meshed with the second bevel gear (18), and the other end of the second rotating shaft (16) is fixedly connected with a first sprocket (19), and the first fixed plate (15) is rotatably connected with two third rotating shafts (20) through a bearing, and one end of the third rotating shaft (20) is fixedly connected with a second sprocket (21), and the first fixed plate (15) is provided with a first chain (22), and the first sprocket (19) and the two second sprockets (21) are transmission-connected through the first chain (22), and the other ends of the two third rotating shafts (20) are fixedly connected with the first bevel gear (18), and the first bevel gear (17) is meshed with the second bevel gear (18), and the other ends of the two third rotating shafts (20) are fixedly connected with the first bevel gear (19), and the first bevel gear (19) and the two second sprockets (21) are transmission-connected through the first chain (22). A third sprocket (23) is fixedly connected, a second fixed plate (24) is fixedly connected to the inner wall of the housing (1), a circular plate (25) is rotatably connected to the second fixed plate (24) through a bearing, an annular sprocket (26) is fixedly connected to the outer wall of the circular plate (25), a second chain (27) is provided above the connecting plate (4), the annular sprocket (26) and the third sprocket (23) are transmission-connected through the second chain (27), an annular gear (28) is fixedly connected to the inner wall of the circular plate (25), a fourth rotating shaft (29) is rotatably connected to the U-shaped plate (12) through a bearing, one end of the fourth rotating shaft (29) is fixedly connected to a first gear (30), the first gear (30) is meshed with the annular gear (28), and both ends of the first rotating shaft (13) are fixedly connected to second gears (31), the second gear (31) is meshed with the first gear (30).

2. The holographic projection mid-air display according to claim 1, characterized in that: An L-shaped plate (32) is fixedly connected to the U-shaped plate (12), a triangular block (33) is fixedly connected to one end of the L-shaped plate (32), and two inclined surfaces are provided on the triangular block (33). A semicircular block (34) is fixedly connected to the lifting plate (8), and the inclined surface of the triangular block (33) is located on a trajectory of the semicircular block (34) moving along with the lifting plate (8).

3. The holographic projection aerial display according to claim 2, characterized in that: The bottom of the U-shaped plate (12) is fixedly connected to a third fixing plate (35), the bottom end of the third fixing plate (35) is fixedly connected to a scraper (36), and one end of the scraper (36) is in close contact with the sponge sleeve (14).

4. The holographic projection aerial display according to claim 3, characterized in that: Two fixed blocks (37) are fixedly connected to the bottom of the shell (1); a closing plate (38) is rotatably connected between the two fixed blocks (37) via a pin shaft; a second spring (39) is fixedly connected between the two closing plates (38) and the inner wall of the shell (1); and the second spring (39) is in a stretched state.

5. The holographic projection mid-air display according to claim 4, characterized in that: Two notches (40) are provided on the closing plate (38), and rollers (41) are rotatably connected in the notches (40) via pins, and the four rollers (41) are in contact with the surface of the holographic interactive display screen (9).

6. The holographic projection aerial display according to claim 5, characterized in that: Gaps (42) are provided between the holographic interactive display screen (9) and the closing plates (38) on both sides, and the gaps (42) are used to allow dust to leave the housing (1).

7. The holographic projection mid-air display according to claim 1, characterized in that: The surface of the third rotating shaft (20) is fixedly connected with a rotating plate (43), and a rotating column (44) is fixedly connected to the rotating plate (43). The top of the connecting plate (4) is fixedly connected with two fixing plates (45), and the top of the fixing plate (45) is located on the trajectory of the rotating column (44) rotating around the third rotating shaft (20). A connecting plate (46) is fixedly connected to the fixing plate (45), and the fixing plate (45) and the connecting plate (46) are elastic. One end of the connecting plate (46) is fixedly connected with an impact ball (47).

8. The holographic projection aerial display according to claim 1, characterized in that: Four circular holes (48) are provided on the housing (1), and the guide rods (10) slide through the circular holes (48).

Images