Multi-angle adjusting structure of projection mapping lamp

Abstract

The invention belongs to the technical field of illumination, and discloses a multi-angle adjusting structure of a projection mapping lamp, which comprises a mounting seat and a projection lamp positioned above the mounting seat, and a plurality of working plates distributed circumferentially are arranged above the mounting seat. A movable mechanism used for driving the working plates to horizontally move and vertically move and a face changing mechanism used for driving the working plates to rotate in different states are arranged above the mounting base, a layer of cleaning bristles is arranged on the surface of each working plate, an arc-shaped rack is arranged on the edge of each working plate, and the arc-shaped racks are arranged on the surfaces of the working plates. The movable mechanism comprises a rectangular plate vertically fixed on the upper surface of the mounting seat, a transverse groove, a vertical groove I and a vertical groove II are formed in the rectangular plate, the vertical groove I and the vertical groove II are communicated with the two ends of the transverse groove respectively, a mounting plate is vertically fixed on the surface of the rectangular plate, and a first motor is fixedly mounted on the mounting plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting, and specifically relates to a multi-angle adjustment structure for a projection mapping lamp. Background Art

[0002] A projection lamp combines lighting technology and video technology to achieve functions such as image processing, image angle rotation, programming, image projection, and integrated image processing, and is a new type of multi-angle projection lamp.

[0003] At present, existing projection lamps on the market can often be adjusted at multiple angles for easy irradiation to different positions. During use, projection lamps tend to generate heat. Most projection lamps do not have an external radiator fan, and the dust accumulated on their surfaces after long-term use will also reduce their own heat dissipation ability, and the accumulated dust will also affect the irradiation effect of the projection lamp. Summary of the Invention

[0004] To solve the problem of difficult dust cleaning mentioned in the above background art, the present invention provides a multi-angle adjustment structure for a projection mapping lamp.

[0005] To achieve the above object, the present invention provides the following technical solution: A multi-angle adjustment structure for a projection mapping lamp, including a mounting base and a projection lamp located above the mounting base. A plurality of working plates distributed in a circular pattern are arranged above the mounting base. An actuating mechanism for driving the horizontal and vertical movement of the working plates and a face-changing mechanism for driving the working plates to rotate in different states are provided above the mounting base. A layer of cleaning bristles is provided on the surface of each working plate, and the edge of each working plate is an arc-shaped rack. The actuating mechanism includes a rectangular plate vertically fixed on the upper surface of the mounting base. A horizontal slot is provided on the rectangular plate, and a first vertical slot and a second vertical slot respectively communicating with both ends of the horizontal slot are provided. An installation plate is vertically fixed on the surface of the rectangular plate, and a first motor is fixedly installed on the installation plate.

[0006] Preferably, a swing rod installed on the output shaft of the first motor is rotatably connected to the surface of the rectangular plate. A strip-shaped slot is provided on the surface of the swing rod. A hollow sliding column slidably adapted to the second vertical slot, the horizontal slot, and the first vertical slot is provided on the rectangular plate. The hollow sliding column is located in the strip-shaped slot and is slidably adapted to the strip-shaped slot.

[0007] Preferably, annular shafts are rotatably connected to both ends of the hollow sliding column. A moving frame is sleeved on the rectangular plate, and the two annular shafts respectively penetrate through the two side walls of the moving frame and are rotatably connected to the moving frame.

[0008] Preferably, a convex-shaped chute is provided on the upper edge of the rectangular plate. An I-shaped slider is slidably connected in the convex-shaped chute. A vertical rod is perpendicularly fixed on the upper surface of the I-shaped slider. The vertical rod passes through the moving frame and is telescopically connected to the moving frame.

[0009] Preferably, a bent plate is fixedly connected to the side wall of the moving frame. A second motor is fixedly installed on the bent plate. An electric telescopic rod is installed at the output end of the second motor. A central seat is fixed at the free end of the electric telescopic rod. The working plate is rotatably connected to the central seat.

[0010] Preferably, the electric telescopic rod includes a first rod body located inside the hollow sliding column and connected to the output shaft of the second motor, and a second rod body located outside the rectangular plate. The central seat is fixedly connected to the second rod body.

[0011] Preferably, the surface-changing mechanism includes an extension seat fixed on the first rod body of the electric telescopic rod. A spring rod parallel to the electric telescopic rod is fixedly connected to the extension seat. The end of the spring rod is fixedly connected to an annular sleeve sleeved on the second rod body of the electric telescopic rod.

[0012] Preferably, a round rod extending into the central seat is fixedly connected to the surface of the annular sleeve. The number of the round rods is the same as that of the working plates and they correspond one by one. A rectangular frame is fixedly connected to the end of the round rod away from the annular sleeve.

[0013] Preferably, a rack is integrally formed on one side of the inner wall of the rectangular frame. A first gear that is coaxially fixed with the working plate and meshes with the rack is rotatably connected in the central seat and located inside the rectangular frame.

[0014] Preferably, two symmetrically distributed vertical plates are perpendicularly fixed on the upper surface of the mounting seat. A U-shaped seat is rotatably connected between the two vertical plates. A first bevel gear coaxially fixed with the U-shaped seat is provided on one of the vertical plates. A second bevel gear is rotatably connected to the other vertical plate, and a third bevel gear coaxially fixed with the second bevel gear and located inside the U-shaped seat. The projection lamp is rotatably connected to the upper surface of the U-shaped seat. A fourth bevel gear coaxially fixed with the projection lamp and meshing with the third bevel gear is provided inside the U-shaped seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing the moving mechanism, the working plate can reciprocate horizontally and can move up and down at different positions; The surface-changing mechanism can drive the working plate into different states. When several working plates form a flat state and the bristles on their surfaces face the projection lamp, the working plate can serve as a cleaning tool at this time. Through the cooperation of the moving mechanism, the working plate is driven to move to a preset position, and the working plate is made to rotate while fitting on the surface of the projection lamp to sweep away the dust on the surface of the projection lamp, which is beneficial to improving the heat dissipation effect of the projection lamp itself and also beneficial to improving the illumination effect of the projection lamp. At the same time, the surface-changing mechanism can also make the working plate in an inclined state, turning several working plates into a fan for use. Through the cooperation of the moving mechanism, the working plate is driven to move to a preset position, and the fan-shaped working plate rotates to perform a heat dissipation operation on the projection lamp.

[0016] Since the moving mechanism can drive the working plate to move horizontally and move up and down at different positions, the working position of the working plate after it becomes a fan can be adjusted according to the working angle of the projection lamp, so that the working plate can dissipate heat as much as possible facing the heat-generating part of the projection lamp.

[0017] The edge of each working plate is an arc-shaped rack, and several working plates form a bevel gear.

[0018] When several working plates are in a flat state, the working plate can not only serve as a cleaning tool, but also become a bevel gear, and the bevel gear can mesh with the second bevel gear and the first bevel gear to complete the angle adjustment work of the projection lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the position of the U-shaped seat in the present invention; Figure 3 is a schematic structural diagram of the hollow sliding column in the present invention; Figure 4 For the present invention Figure 1 is an enlarged schematic structural diagram of part A in the present invention; Figure 5 is a schematic structural diagram of the position of the mounting plate in the present invention; Figure 6 is a schematic structural diagram of the position of the extension seat in the present invention; Figure 7 For the present invention Figure 5 is an enlarged schematic structural diagram of part B in the present invention; Figure 8 is a schematic structural diagram of the position of the annular sleeve in the present invention; Figure 9 is a schematic structural diagram of the position of the rectangular frame in the present invention.

[0020] In the figure: 1, mounting base; 2, projection lamp; 3, working plate; 41, vertical plate; 42, U-shaped seat; 43, first bevel gear; 44, second bevel gear; 45, third bevel gear; 46, fourth bevel gear; 51, rectangular plate; 52, horizontal groove; 53, first vertical groove; 54, second vertical groove; 55, swing rod; 56, strip-shaped groove; 57, mounting plate; 58, first motor; 59, hollow sliding column; 510, annular shaft; 511, moving frame; 512, convex-shaped sliding groove; 513, I-shaped slider; 514, vertical rod; 515, bent plate; 516, second motor; 517, electric telescopic rod; 518, central seat; 61, extension seat; 62, spring rod; 63, annular sleeve; 64, round rod; 65, rectangular frame; 66, rack; 67, first gear. Detailed implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 to 2 shown, the present invention provides a multi-angle adjustment structure for a projection mapping lamp, including a mounting base 1 and a projection lamp 2 located above the mounting base 1. A plurality of working plates 3 distributed in a circular pattern are arranged above the mounting base 1. An activity mechanism for driving the horizontal movement and vertical movement of the working plates 3 and a surface-changing mechanism for driving the working plates 3 to rotate in different states are provided above the mounting base 1. Each working plate 3 has a layer of cleaning bristles on its surface.

[0023] Among them, the bristles on the surface of the working plate 3 are not shown in the figure.

[0024] By setting the activity mechanism, the working plate 3 can move reciprocally along the horizontal direction and can move vertically at different positions; The surface-changing mechanism can drive the working plate 3 to be in different states. When a plurality of working plates 3 form a flat state and the bristles on their surfaces face the projection lamp 2, the working plate 3 can be used as a cleaning tool at this time. Through the cooperation of the activity mechanism, the working plate 3 is driven to move to a preset position, and the working plate 3 is made to rotate while fitting on the surface of the projection lamp 2 to sweep away the dust on the surface of the projection lamp 2, which is beneficial to improving the heat dissipation effect of the projection lamp 2 itself and also beneficial to improving the irradiation effect of the projection lamp 2; At the same time, the surface-changing mechanism can also make the working plate 3 in an inclined state, making a plurality of working plates 3 become a fan for use. Through the cooperation of the activity mechanism, the working plate 3 is driven to move to a preset position, and the fan-shaped working plate 3 is rotated to perform a heat dissipation work on the projection lamp 2.

[0025] Since the movable mechanism can drive the working plate 3 to move horizontally and move up and down at different positions, the working position of the working plate 3 after it becomes a fan can be adjusted according to the working angle of the projection lamp 2, so that the working plate 3 can dissipate heat as much as possible facing the heat generating part of the projection lamp 2.

[0026] As Figures 1 to 2 shown, two symmetrically distributed vertical plates 41 are vertically fixed on the upper surface of the mounting base 1. A U-shaped seat 42 is rotatably connected between the two vertical plates 41. A first bevel gear 43 coaxially fixed with the U-shaped seat 42 is arranged on one of the vertical plates 41. A second bevel gear 44 is rotatably connected to the other vertical plate 41, and a third bevel gear 45 coaxially fixed with the second bevel gear 44 and located inside the U-shaped seat 42. The projection lamp 2 is rotatably connected to the upper surface of the U-shaped seat 42. A fourth bevel gear 46 coaxially fixed with the projection lamp 2 and meshing with the third bevel gear 45 is arranged inside the U-shaped seat 42.

[0027] Among them, the rotating shafts of the second bevel gear 44 and the third bevel gear 45 pass through the U-shaped seat 42, but the U-shaped seat 42 does not rotate with the second bevel gear 44 and the third bevel gear 45. The U-shaped seat 42 only rotates with the first bevel gear 43; The edge of each working plate 3 is an arc-shaped rack, and several working plates 3 form a bevel gear.

[0028] When several working plates 3 are in a flat state, the working plate 3 can not only be used as a cleaning tool, but also become a bevel gear, and the bevel gear can mesh with the second bevel gear 44 and the first bevel gear 43.

[0029] As Figure 1 - Figure 5 shown, the movable mechanism includes a rectangular plate 51 vertically fixed on the upper surface of the mounting base 1. A horizontal groove 52 is formed in the rectangular plate 51, and a first vertical groove 53 and a second vertical groove 54 respectively communicated with both ends of the horizontal groove 52. An installation plate 57 is vertically fixed on the surface of the rectangular plate 51. A first motor 58 is fixedly installed on the installation plate 57. A swing rod 55 installed on the output shaft of the first motor 58 is rotatably connected to the surface of the rectangular plate 51. A strip-shaped groove 56 is formed on the surface of the swing rod 55. A hollow sliding column 59 slidably adapted to the second vertical groove 54, the horizontal groove 52 and the first vertical groove 53 is arranged on the rectangular plate 51. The hollow sliding column 59 is located in the strip-shaped groove 56 and slidably adapted to the strip-shaped groove 56.

[0030] Adopting the above scheme, the first motor 58 can drive the swing rod 55 to rotate, and when the swing rod 55 swings, it can push the hollow sliding column 59 to move in the second vertical groove 54, the horizontal groove 52 and the first vertical groove 53.

[0031] As Figure 1 and Figure 4As shown in the figure, annular shafts 510 are rotatably connected to both ends of the hollow sliding column 59. A moving frame 511 is sleeved on the rectangular plate 51. The two annular shafts 510 respectively penetrate through the two side walls of the moving frame 511 and are rotatably connected to the moving frame 511. A convex-shaped sliding groove 512 is formed in the upper edge of the rectangular plate 51. An I-shaped slider 513 is slidably connected in the convex-shaped sliding groove 512. A vertical rod 514 is vertically fixed on the upper surface of the I-shaped slider 513. The vertical rod 514 passes through the moving frame 511 and is telescopically connected to the moving frame 511.

[0032] With the above structure, the moving frame 511 can move along the second vertical groove 54, the horizontal groove 52 and the first vertical groove 53 following the hollow sliding column 59, and the rotation of the hollow sliding column 59 during movement will not affect the moving frame 511. The hollow sliding column 59 can rotate to reduce the friction between it and the inner wall of the strip-shaped groove 56.

[0033] As Figure 1 and Figure 4 shown in the figure, a bent plate 515 is fixedly connected to the side wall of the moving frame 511. A second motor 516 is fixedly installed on the bent plate 515. An electric telescopic rod 517 is installed at the output end of the second motor 516. A center seat 518 is fixed at the free end of the electric telescopic rod 517. The working plate 3 is rotatably connected to the center seat 518.

[0034] With the above solution, the working plate 3 can move along the second vertical groove 54, the horizontal groove 52 and the first vertical groove 53 following the moving frame 511, and the working plate 3 can be driven to rotate by the second motor 516 through the center seat 518 and the electric telescopic rod 517. At the same time, the electric telescopic rod 517 can control the distance between the working plate 3 and the rectangular plate 51.

[0035] As Figure 1 and Figure 4 shown in the figure, the electric telescopic rod 517 includes a first rod body located inside the hollow sliding column 59 and connected to the output shaft of the second motor 516, and a second rod body located outside the rectangular plate 51. The center seat 518 is fixedly connected to the second rod body.

[0036] As Figures 4 to 9As shown in the figure, the surface-changing mechanism includes an extension seat 61 fixed on the first rod body of the electric telescopic rod 517. A spring rod 62 parallel to the electric telescopic rod 517 is fixedly connected to the extension seat 61. The end of the spring rod 62 is fixedly connected with an annular sleeve 63 sleeved on the second rod body of the electric telescopic rod 517. A round rod 64 extending into the center seat 518 is fixedly connected to the surface of the annular sleeve 63. The number of the round rods 64 is the same as and corresponds one by one to the number of the working plates 3. A rectangular frame 65 is fixedly connected to one end of the round rod 64 away from the annular sleeve 63. A rack 66 is integrally formed on one side of the inner wall of the rectangular frame 65. A first gear 67 that is coaxially fixed with the working plate 3 and meshes with the rack 66 is rotatably connected in the center seat 518.

[0037] When the second rod body of the electric telescopic rod 517 extends outward from the first rod body, the second rod body can drive the center seat 518 to move accordingly. The center seat 518 can drive the working plate 3 and the first gear 67 to move accordingly. Since the first gear 67 and the rectangular frame 65 mesh with each other, the first gear 67 will rotate when moving. The first gear 67 drives the working plate 3 to rotate into a flat state. Figure 7 、 Figure 8 and Figure 9 the state shown in the figure; Since the first gear 67 is restricted within the rectangular frame 65, when the second rod body continues to extend outward from the first rod body, the first gear 67 can drive the rectangular frame 65 and the round rod 64 to move accordingly, causing a tensile force on the spring rod 62. When the second rod body of the electric telescopic rod 517 contracts into the first rod body, the second rod body can drive the center seat 518 to move accordingly. The center seat 518 can drive the working plate 3 and the first gear 67 to move accordingly. Since the first gear 67 and the rectangular frame 65 mesh with each other, the first gear 67 will rotate in the reverse direction when moving. The first gear 67 drives the working plate 3 to rotate into an inclined state. After that, when the second rod body continues to contract into the first rod body, the first gear 67 can drive the rectangular frame 65 and the round rod 64 to move accordingly, squeezing the spring rod 62, causing a thrust force on the spring rod 62. Since there is a layer of bristles on the surface of the working plate 3, the working plate 3 in the flat state can be used as a cleaning tool. By making the working plate 3 fit and rotate on the surface of the projection lamp 2, the dust on the surface of the projection lamp 2 can be swept away. Moreover, the edge of each working plate 3 is an arc-shaped rack. The working plates 3 in the flat state form a bevel gear. If they mesh with the second bevel gear 44 or the first bevel gear 43, the working angle of the projection lamp 2 can be adjusted. After the second rod body of the electric telescopic rod 517 moves into the first rod body, the spring rod 62 will give a thrust to the annular sleeve 63, and at the same time, it can give a thrust to the rectangular frame 65 and the rack 66 through the round rod 64, so that the rectangular frame 65 and the rack 66 move away from the annular sleeve 63. The rectangular frame 65 can drive the first gear 67 and the working plate 3 to rotate, making the working plate 3 in an inclined state. The rotation of the working plate 3 in the inclined state can complete the heat dissipation work of the projection lamp 2.

[0038] The working principle of the present invention: The first motor 58 drives the swing rod 55 to swing. The swing rod 55 can push the hollow sliding column 59 to move along the second vertical groove 54, the horizontal groove 52 and the first vertical groove 53. The hollow sliding column 59 can drive the moving frame 511 to move along the second vertical groove 54, the horizontal groove 52 and the first vertical groove 53 through the annular shaft 510. The moving frame 511 can drive the bending plate 515, the second motor 516, the electric telescopic rod 517, the central seat 518 and the working plate 3 to move along the second vertical groove 54, the horizontal groove 52 and the first vertical groove 53 accordingly; After the second rod body of the electric telescopic rod 517 extends out of the first rod body, the spring rod 62 will give a pulling force to the annular sleeve 63, and at the same time, it can give a pulling force to the rectangular frame 65 and the rack 66 through the round rod 64, so that the rectangular frame 65 and the rack 66 move closer to the annular sleeve 63. The rectangular frame 65 can drive the first gear 67 and the working plate 3 to rotate, making several working plates 3 in a flat state; And the edge of each working plate 3 is an arc-shaped rack. The working plates 3 in the flat state form a bevel gear; When the electric telescopic rod 517 and the hollow sliding column 59 are at the lower end of the second vertical groove 54, after the second rod body of the electric telescopic rod 517 extends out of the first rod body, several working plates 3 are in a flat state, and at this time, the bevel gear formed by several working plates 3 will mesh with the second bevel gear 44; The second motor 516 drives the electric telescopic rod 517 to rotate. The electric telescopic rod 517 can drive the working plate 3 to rotate through the central seat 518. The working plate 3 can drive the second bevel gear 44 to rotate accordingly. The second bevel gear 44 can drive the third bevel gear 45 to rotate. The third bevel gear 45 can drive the fourth bevel gear 46 and the projection lamp 2 to rotate to a preset angle; When the electric telescopic rod 517 and the hollow sliding column 59 are at the lower end of the first vertical groove 53, the working plate 3 in the flat state can mesh with the first bevel gear 43, driving the first bevel gear 43 to rotate. The first bevel gear 43 can drive the U-shaped seat 42 to rotate accordingly. The U-shaped seat 42 can drive the projection lamp 2 to rotate, thus completing the multi-angle adjustment of the projection lamp 2; Since there is a layer of bristles on the surface of the working plate 3, the working plate 3 in the flat state can be used as a cleaning tool. When the working plate 3 is performing cleaning work, the hollow sliding column 59 is located in the transverse groove 52. At this time, the working plate 3 can face the projection lamp 2 directly. The electric telescopic rod 517 drives the working plate 3 to move towards the projection lamp 2, and the working plate 3 rotates while sticking to the surface of the projection lamp 2 to complete the cleaning work of the projection lamp 2.

[0039] The angle of the projection lamp 2 can be adjusted. If it is necessary to clean the irradiation surface of the projection lamp 2, the irradiation surface of the projection lamp 2 is rotated to face the rectangular plate 51 directly, so as to facilitate the working plate 3 to perform cleaning. After the second rod body of the electric telescopic rod 517 moves into the first rod body, the spring rod 62 will give a thrust to the annular sleeve 63, and at the same time, it can give a thrust to the rectangular frame 65 and the rack 66 through the round rod 64, so that the rectangular frame 65 and the rack 66 move away from the annular sleeve 63. The rectangular frame 65 can drive the first gear 67 and the working plate 3 to rotate, so that the working plate 3 becomes inclined. The rotation of the working plate 3 in the inclined state can complete the heat dissipation work of the projection lamp 2.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-angle adjustment structure for a projection mapping lamp, characterized in that: It includes a mounting base (1) and a projection lamp (2) located above the mounting base (1). Above the mounting base (1), several working plates (3) are arranged in a circular distribution. Above the mounting base (1), there is an activity mechanism for driving the horizontal and vertical movement of the working plates (3), and a face-changing mechanism for driving the working plates (3) to rotate in different states. Each surface of the working plates (3) has a layer of cleaning bristles, and the edge of each working plate (3) is an arc-shaped rack. The activity mechanism includes a rectangular plate (51) vertically fixed on the upper surface of the mounting base (1). A horizontal groove (52) is opened on the rectangular plate (51), and a first vertical groove (53) and a second vertical groove (54) are respectively communicated with both ends of the horizontal groove (52). An installation plate (57) is vertically fixed on the surface of the rectangular plate (51), and a first motor (58) is fixedly installed on the installation plate (57).

2. The multi-angle adjustment structure of the projection mapping lamp according to claim 1, characterized in that: A swing rod (55) installed on the output shaft of the first motor (58) is rotatably connected to the surface of the rectangular plate (51). A strip-shaped groove (56) is opened on the surface of the swing rod (55). A hollow sliding column (59) that is slidably adapted to the second vertical groove (54), the horizontal groove (52), and the first vertical groove (53) is arranged on the rectangular plate (51). The hollow sliding column (59) is located in the strip-shaped groove (56) and is slidably adapted to the strip-shaped groove (56).

3. The multi-angle adjustment structure of the projection mapping lamp according to claim 2, characterized in that: Both ends of the hollow sliding column (59) are rotatably connected to an annular shaft (510). A moving frame (511) is sleeved on the rectangular plate (51). The two annular shafts (510) respectively penetrate through the two side walls of the moving frame (511) and are rotatably connected to the moving frame (511).

4. The multi-angle adjustment structure of the projection mapping lamp according to claim 3, characterized in that: A convex-shaped sliding groove (512) is opened on the upper edge of the rectangular plate (51). An I-shaped slider (513) is slidably connected in the convex-shaped sliding groove (512). A vertical rod (514) is vertically fixed on the upper surface of the I-shaped slider (513). The vertical rod (514) passes through the moving frame (511) and is telescopically connected to the moving frame (511).

5. The multi-angle adjustment structure of the projection mapping lamp according to claim 4, characterized in that: A bent plate (515) is fixedly connected to the side wall of the moving frame (511). A second motor (516) is fixedly installed on the bent plate (515). An electric telescopic rod (517) is installed at the output end of the second motor (516). A central seat (518) is fixed at the free end of the electric telescopic rod (517). The working plate (3) is rotatably connected to the central seat (518).

6. The multi-angle adjustment structure of the projection mapping lamp according to claim 5, characterized in that: The electric telescopic rod (517) includes a first rod body located inside the hollow sliding column (59) and connected to the output shaft of the second motor (516), and a second rod body located outside the rectangular plate (51). The central seat (518) is fixedly connected to the second rod body.

7. The multi-angle adjustment structure of the projection mapping lamp according to claim 6, characterized in that: The face-changing mechanism includes an extension seat (61) fixed on the first rod body of the electric telescopic rod (517). A spring rod (62) parallel to the electric telescopic rod (517) is fixedly connected to the extension seat (61). An annular sleeve (63) sleeved on the second rod body of the electric telescopic rod (517) is fixedly connected to the end of the spring rod (62).

8. The multi-angle adjustment structure of the projection mapping lamp according to claim 7, characterized in that: A round rod (64) extending into the central seat (518) is fixedly connected to the surface of the annular sleeve (63). The number of the round rods (64) is the same as and corresponds one by one to the number of the working plates (3). One end of the round rod (64) far from the annular sleeve (63) is fixedly connected with a rectangular frame (65).

9. The multi-angle adjustment structure of the projection mapping lamp according to claim 8, wherein: A rack (66) is integrally formed on one side of the inner wall of the rectangular frame (65). A first gear (67) which is coaxially fixed with the working plate (3) and meshes with the rack (66) is rotatably connected in the central seat (518) and is located in the rectangular frame (65).

10. The multi-angle adjustment structure of the projection mapping lamp according to claim 1, wherein: Two symmetrically distributed vertical plates (41) are perpendicularly fixed to the upper surface of the mounting seat (1). A U-shaped seat (42) is rotatably connected between the two vertical plates (41). A first bevel gear (43) coaxially fixed with the U-shaped seat (42) is arranged on one of the vertical plates (41). A second bevel gear (44) is rotatably connected to the other vertical plate (41), and a third bevel gear (45) which is coaxially fixed with the second bevel gear (44) and is located in the U-shaped seat (42). The projection lamp (2) is rotatably connected to the upper surface of the U-shaped seat (42). A fourth bevel gear (46) which is coaxially fixed with the projection lamp (2) and meshes with the third bevel gear (45) is arranged in the U-shaped seat (42).

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