Projection type portable rotary starry sky demonstration instrument convenient to use

Abstract

The invention discloses a convenient-to-use projection type portable rotating starry sky demonstration instrument, and relates to the technical field of projection demonstration instruments, the convenient-to-use projection type portable rotating starry sky demonstration instrument comprises a bottom plate, first stand columns are fixedly connected to the corners of the bottom of the bottom plate, and first partition plates are fixedly connected between the upper end faces of the first stand columns; second stand columns are fixedly connected to the edges of the tops of the first partition plates, second partition plates are fixedly connected between the upper end faces of the second stand columns, and a plurality of third stand columns are fixedly connected to the tops of the second partition plates. In the demonstration instrument, the first motor and the second motor are matched with a simple mechanical structure to perform driving operation, so that a celestial body change image in a motion state can be completely projected and demonstrated, and the demonstrated star sky motion direction is consistent with the actual star sky motion direction; the problem that the star sky movement direction and the actual movement direction on the textbook are difficult to fuse is solved, the teaching pressure of teachers is relieved, the learning interest of students is stimulated, and the learning efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of projection demonstrator, in particular to a projection-type portable rotating starry sky demonstrator which is convenient to use. Background Art

[0002] A projector is a device that can project images or videos onto a screen. It uses the convex lens imaging principle to project transparent objects onto the screen to form a magnified image.

[0003] In the prior art, when conducting teaching work, it is necessary to carry out teaching content on the principle of starry sky operation. However, the existing starry sky principle demonstration equipment is relatively expensive and difficult to be equipped in various classrooms for teaching use. Therefore, teachers can only explain to students with reference to pictures in books. For the picture demonstrations in the books, it is difficult for students to imagine the changing state of the starry sky based on the monotonous teaching pictures, which brings a lot of inconvenience to the teacher's teaching work.

[0004] Therefore, we propose a convenient projection-type portable rotating starry sky demonstrator to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide an easy-to-use projection-type portable rotating starry sky demonstrator to solve the problem raised in the above background technology that it is difficult for students to imagine the changing state of the starry sky based on the monotonous teaching pictures, which brings a lot of inconvenience to the teaching work of teachers.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a convenient-to-use projection-type portable rotating starry sky demonstrator, comprising a bottom plate and a sleeve ring, wherein first columns are fixedly connected at the bottom corners of the bottom plate, a plurality of first columns are fixedly connected with a first partition plate between the upper end surfaces, a second column is fixedly connected at the top edge of the first partition plate, a plurality of second columns are fixedly connected with a second partition plate between the upper end surfaces, a plurality of third columns are fixedly connected with the top of the second partition plate, a plurality of third columns are fixedly connected with the upper end surfaces of the third columns, a first motor is fixedly connected to the bottom of the second partition plate, an output end of the first motor passes through the second partition plate and extends to the upper side, and an output end of the first motor passes through the second partition plate and extends to the upper side. The output end is fixedly connected to a first rotating shaft, the upper end surface of the first rotating shaft is fixedly connected to a first gear, the top of the second partition is fixedly connected to a supporting shaft, the upper end surface of the supporting shaft is fixedly connected to a second gear, the top of the second gear is fixedly connected to a turntable, a plurality of rotating projection film seats are evenly connected to the top of the turntable, the top of the first partition is fixedly connected to an optical lens, the top of the bottom plate is fixedly connected to an outer shell, the top of the outer shell is fixedly connected to a top plate, the top of the top plate is fixedly connected to an optical focusing lens seat, an optical lens fixing ring is arranged on the top of the optical focusing lens seat, an optical lens fixing ring is arranged on the top of the optical lens fixing ring, and an optical lens seat is matched with the position of the rotating projection film seat.

[0007] Preferably, a avoidance groove is provided on the top of the second partition, the optical lens is located inside the avoidance groove, and the top of the optical lens is located above the second partition.

[0008] Preferably, a plurality of through holes are evenly opened on the top of the turntable, the through holes match the positions of the rotating projection film holder, and the optical lens matches the rotation path of the rotating projection film holder.

[0009] Preferably, the second gear is meshedly connected with the first gear, the thickness of the first gear is smaller than the thickness of the second gear, and the first gear is located at the lower side of the turntable.

[0010] Preferably, a second motor is fixedly connected to the top of the third partition, the output end of the second motor passes through the third partition and extends to the lower side, the output end of the second motor is fixedly connected to a second rotating shaft, and the lower end surface of the second rotating shaft is fixedly connected to a fourth gear.

[0011] Preferably, the top of the turntable is rotatably connected to a rotating seat, the top of the rotating seat is fixedly connected to a sixth gear, the top of the sixth gear is fixedly connected to a fifth gear, and the fifth gear is meshingly connected to the fourth gear.

[0012] Preferably, the outer surfaces of the plurality of rotating projection film holders are fixedly connected with third gears, the plurality of third gears are evenly distributed at the outer sides of the sixth gear, and the third gears are meshingly connected with the sixth gear.

[0013] Preferably, a cooling fan is symmetrically fixedly connected to the top of the base plate, and a cooling fin is fixedly connected to the top of the base plate, and the cooling fin is located between two cooling fans.

[0014] Preferably, the heat dissipation fins are matched with the positions of the optical lenses, a thermal pad is arranged on the top of the heat dissipation fins, and the top of the thermal pad is in contact with the bottom of the first partition.

[0015] Preferably, a remote control panel is fixedly connected to the top of the third partition, a control panel is fixedly connected to the top of the top plate, a control button is fixedly connected to the top of the top plate, the control button and the control panel are matched with each other, the control panel is electrically connected to the remote control panel, the ring is located outside the optical lens seat, a side block is fixedly connected to the outer surface of the ring, a positioning seat is fixedly connected to the top of the side block, a threaded rod is fixedly connected to the top of the positioning seat, a rotating block is arranged on the outer surface of the threaded rod, a baffle is fixedly connected to the outer surface of the rotating block, a nut is threadedly connected to the outer surface of the threaded rod, the nut is located on the upper side of the rotating block, and the baffle is located on the upper side of the optical lens seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the projection demonstrator is in use, when the rotating projection holder is placed within the focus of the optical lens, an upright and enlarged real image will be formed above the optical lens. Since the turntable is in a rotating state driven by the first motor, and the multiple rotating projection holders correspond to the images of different stages of celestial body changes, while switching the rotating projection holders to demonstrate the celestial body change stages, the second motor can drive the rotating projection holder to rotate. While the multiple rotating projection holders are in a rotating switching state, a single rotating projection holder is also in a rotating state. The projection demonstrated is a rotation state simulating the movement of the starry sky. The demonstrator is driven and operated by the first motor and the second motor in conjunction with a simple mechanical structure, so that the projection can fully demonstrate the changing images of celestial bodies in motion, and the demonstrated starry sky movement direction is consistent with the actual starry sky movement direction, which solves the problem that the direction in the textbook and the actual direction are difficult to integrate, reduces the teaching pressure of teachers, and brings easy and efficient learning efficiency to students.

[0017] 2. When the demonstrator is running, a thermal pad with a certain elasticity is used to fill the position between the first partition and the heat sink fins. That is, the heat generated by the operation of the optical lens can be efficiently conducted through the use of the thermal pad. After the heat is conducted to the position of the heat sink fins, the heat generated by the operation of the optical lens can be discharged more efficiently by utilizing the setting of a larger contact area between the heat sink fins and the air, in conjunction with the operation of the cooling fan, thereby improving the heat dissipation efficiency of the demonstrator.

[0018] 3. By using the control button, the control panel and the remote control panel together, the first motor and the second motor can be controlled separately, and a variety of projection effects can be achieved by adjusting the different speeds of the first motor and the second motor.

[0019] 4. When the collar is at the outer side of the optical lens mount, the optical lens mount is in normal use. The side block, the positioning seat and the threaded rod are arranged in cooperation to provide support for the rotating block. The rotating block can drive the baffle to rotate freely. The baffle can be rotated to a position covering the top of the optical lens mount. The rotating block can be clamped and fixed by tightening the nut. At this time, the optical lens mount can be covered by the setting of the smaller grooves on the surface of the baffle. After the covering is completed, the visible starry sky can be simulated, that is, the starry sky seen by the human eye on different dates. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A stereogram of a portable projection-type rotating starry sky demonstrator that is convenient to use according to the present invention; Figure 2 A front view of a portable projection-type rotating starry sky demonstrator that is convenient to use according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a portable projection-type rotating starry sky demonstrator that is convenient to use according to the present invention; Figure 4 for Figure 3 A magnified view of the structure at A; Figure 5 A front view of the internal structure of a portable projection-type rotating starry sky demonstrator that is convenient to use according to the present invention; Figure 6 for Figure 5 A magnified view of the structure at B in FIG. Figure 7 The present invention is a schematic diagram of a sleeve ring structure of a portable projection-type rotating starry sky demonstrator that is easy to use.

[0021] In the figure: 1. Bottom plate; 2. First column; 3. First baffle; 4. Second column; 5. Second baffle; 6. Third column; 7. Third baffle; 9. First motor; 10. First rotating shaft; 11. First gear; 12. Support shaft; 13. Second gear; 14. Turntable; 15. Rotating slide holder; 16. Third gear; 17. Second motor; 18. Second rotating shaft; 19. Fourth gear; 20. Fifth gear; 21. Sixth gear; 22. Rotating seat; 23. Cooling fan; 24. Cooling fins; 25. Thermal pad; 26. Optical lens; 27. Remote control panel; 28. Top plate; 29. ​​Housing; 30. Control panel; 31. Control button; 32. Optical focusing lens seat; 33. Optical lens fixing ring; 34. Optical lens seat; 35. Ring; 36. Side block; 37. Positioning seat; 38. Threaded rod; 39. Rotating block; 40. Nut; 41. Block. DETAILED DESCRIPTION

[0022] 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 implementation regulations 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 creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 7 The present invention provides a technical solution: a convenient-to-use projection-type portable rotating starry sky demonstrator, comprising a bottom plate 1, first columns 2 are fixedly connected at the bottom corners of the bottom plate 1, first baffles 3 are fixedly connected between the upper end surfaces of multiple first columns 2, second columns 4 are fixedly connected at the top edges of the first baffles 3, second baffles 5 are fixedly connected between the upper end surfaces of multiple second columns 4, multiple third columns 6 are fixedly connected at the top of the second baffles 5, third baffles 7 are fixedly connected between the upper end surfaces of multiple third columns 6, a first motor 9 is fixedly connected to the bottom of the second baffle 5, an output end of the first motor 9 passes through the second baffle 5 and extends to the upper side, a first rotating shaft 10 is fixedly connected to the output end of the first motor 9, and the first rotating shaft A first gear 11 is fixedly connected to the upper end surface of 10, a support shaft 12 is fixedly connected to the top of the second partition 5, a second gear 13 is fixedly connected to the upper end surface of the support shaft 12, a turntable 14 is fixedly connected to the top of the second gear 13, a plurality of rotating projection film seats 15 are evenly connected to the top of the turntable 14, an optical lens 26 is fixedly connected to the top of the first partition 3, a shell 29 is fixedly connected to the top of the bottom plate 1, a top plate 28 is fixedly connected to the top of the shell 29, an optical focusing lens seat 32 is fixedly connected to the top of the top plate 28, an optical lens fixing ring 33 is arranged on the top of the optical lens fixing ring 33, an optical lens seat 34 is arranged on the top of the optical lens fixing ring 33, and the optical lens seat 34 matches the position of the rotating projection film seat 15.

[0024] like Figure 3 and Figure 4 As shown, an avoidance groove is provided on the top of the second partition 5, the optical lens 26 is located on the inner side of the avoidance groove, and the top of the optical lens 26 is located above the second partition 5. When the optical lens 26 is in operation, when the rotating projection film holder 15 is placed within the focus of the optical lens 26, an upright and enlarged real image will be formed above the optical lens 26. At the same time, with the use of the top optical focusing lens holder 32, the optical lens fixing ring 33 and the optical lens holder 34, the image corresponding to the rotating projection film holder 15 can be projected onto the roof of the classroom to achieve the demonstration purpose.

[0025] like Figure 3 and Figure 4 As shown, a plurality of through holes are evenly arranged on the top of the turntable 14, which are matched with the positions of the rotating projection film holder 15, and the optical lens 26 is matched with the rotation path of the rotating projection film holder 15. When the turntable 14 rotates, the plurality of rotating projection film holders 15 are moved in sequence to the position above the optical lens 26. At this time, the changing stages of the celestial body can be completely and continuously demonstrated at the demonstration position.

[0026] like Figure 5 and Figure 6 As shown, the second gear 13 is meshed and connected with the first gear 11, the thickness of the first gear 11 is less than that of the second gear 13, and the first gear 11 is located at the lower side of the turntable 14. After the first motor 9 is running, it can drive the first rotating shaft 10 to rotate, and the rotation of the first rotating shaft 10 can drive the first gear 11 to rotate. The first gear 11 can drive the turntable 14 to rotate by meshing with the second gear 13.

[0027] like Figure 5 and Figure 6 As shown, a second motor 17 is fixedly connected to the top of the third partition 7, an output end of the second motor 17 passes through the third partition 7 and extends to the lower side, a second rotating shaft 18 is fixedly connected to the output end of the second motor 17, and a fourth gear 19 is fixedly connected to the lower end face of the second rotating shaft 18. When the rotating projection holder 15 is switched to perform a star body change stage demonstration, the operation of the second motor 17 can drive the second rotating shaft 18 to rotate, and when the second rotating shaft 18 rotates, it drives the fourth gear 19 to follow the rotation, and through the rotation of the fourth gear 19, the sixth gear 21 can be driven to follow the rotation through engagement with the fifth gear 20.

[0028] like Figure 5 and Figure 6As shown, the top of the turntable 14 is rotatably connected to a rotating base 22, the top of the rotating base 22 is fixedly connected to a sixth gear 21, the top of the sixth gear 21 is fixedly connected to a fifth gear 20, the fifth gear 20 is meshingly connected to the fourth gear 19, through the rotation of the sixth gear 21, since the sixth gear 21 and the multiple third gears 16 on the outside are all in a meshing state, when the sixth gear 21 rotates, the third gears 16 can be driven to rotate along, and the rotation of the third gears 16 can drive the rotating projection film holder 15 to rotate.

[0029] like Figure 3 and Figure 4 As shown, the outer surfaces of multiple rotating projection film holders 15 are fixedly connected with third gears 16, and multiple third gears 16 are evenly distributed on the outer side of the sixth gear 21. The third gears 16 are meshingly connected with the sixth gear 21. When the rotating projection film holder 15 cooperates with the optical lens 26 for projection, while the multiple rotating projection film holders 15 are in a rotation switching state, a single rotating projection film holder 15 is also in a rotation state.

[0030] like Figure 3 and Figure 4 As shown, a cooling fan 23 is symmetrically fixedly connected to the top of the base plate 1, and a cooling fin 24 is fixedly connected to the top of the base plate 1. The cooling fin 24 is located between the two cooling fans 23. By using a thermal pad 25, a thermal pad 25 with a certain elasticity is filled between the first partition plate 3 and the cooling fin 24. That is, by using the thermal pad 25, the heat generated by the operation of the optical lens 26 can be efficiently conducted, and the heat is conducted to the cooling fin 24.

[0031] like Figure 3 and Figure 4 As shown, the heat sink fin 24 is matched with the position of the optical lens 26, a thermal pad 25 is arranged on the top of the heat sink fin 24, and the top of the thermal pad 25 is fitted with the bottom of the first partition 3. By utilizing the setting of the larger contact area between the heat sink fin 24 and the air and cooperating with the operation of the heat dissipation fan 23, the heat generated by the operation of the optical lens 26 can be discharged more efficiently.

[0032] like Figure 1 , Figure 5 and Figure 7As shown, a remote control panel 27 is fixedly connected to the top of the third partition 7, a control panel 30 is fixedly connected to the top of the top plate 28, a control button 31 is fixedly connected to the top of the top plate 28, the control button 31 and the control panel 30 are matched, the control panel 30 is electrically connected to the remote control panel 27, a collar 35 is located at the outer side of the optical lens seat 34, a side block 36 is fixedly connected to the outer surface of the collar 35, a positioning seat 37 is fixedly connected to the top of the side block 36, a threaded rod 38 is fixedly connected to the top of the positioning seat 37, a rotating block 39 is arranged on the outer surface of the threaded rod 38, a baffle 41 is fixedly connected to the outer surface of the rotating block 39, a nut 40 is threadedly connected to the outer surface of the threaded rod 38, the nut 40 is located at the upper side of the rotating block 39, and the baffle 41 is located at the upper side of the optical lens seat 34. When the projector is in use, after the base plate 1 is placed on the desktop, the optical lens seat 34 is vertically aligned with the classroom room. The top state is then achieved by the coordinated use of the control button 31, the control panel 30 and the remote control panel 27, the first motor 9 and the second motor 17 can be controlled respectively, and a variety of projection effects can be achieved by adjusting the different speeds of the first motor 9 and the second motor 17. When the collar 35 is at the outer position of the optical lens holder 34, the optical lens holder 34 is in normal use. The side block 36, the positioning seat 37 and the threaded rod 38 are coordinated to provide support for the rotating block 39, and the rotating block 39 can drive the baffle 41 to rotate freely. The baffle 41 can be rotated to a position covering the top of the optical lens holder 34, and the nut 40 can be tightened and fixed to the position of the rotating block 39. At this time, the setting of the smaller groove on the surface of the baffle 41 can cover the optical lens holder 34. After the covering is completed, the visible starry sky, that is, the starry sky seen by the human eye on different dates, can be simulated.

[0033] The method of use and working principle of the device: When the projection demonstrator is in use, the base plate 1 is placed on the desktop, and the optical lens seat 34 is in a state of vertically pointing upward to the classroom roof. Then, the first motor 9 and the second motor 17 can be controlled separately by using the control button 31, the control panel 30 and the remote control panel 27. The remote control panel 27 is wirelessly connected to the remote control to control the demonstrator. By operating the remote control, the demonstrator can be controlled to rotate forward and reverse, the speed is adjustable, the rotation can be stopped, and the previous and next pictures can be switched. By adjusting the different speeds of the first motor 9 and the second motor 17, a variety of projection effects can be achieved. When the demonstrator is running, the first motor 9 can drive the first rotating shaft 10 to rotate after running. Through the first rotating shaft 10 The rotation of the first gear 11 can drive the first gear 11 to rotate accordingly. The first gear 11 can drive the turntable 14 to rotate by meshing with the second gear 13. The support shaft 12 can provide support for the rotation of the turntable 14 and the second gear 13. The initial position of the turntable 14 is that the optical lens 26 at the bottom is aligned with one of the rotating projection film seats 15 above. The image inside the rotating projection film seat 15 is a planetary motion projection. Therefore, when the optical lens 26 is running, when the rotating projection film seat 15 is placed within the focus of the optical lens 26, an upright and enlarged real image will be formed above the optical lens 26. At the same time, with the use of the top optical focusing lens seat 32, the optical lens fixing ring 33 and the optical lens seat 34, the rotating projection film seat can be 15 is projected onto the classroom roof to achieve the purpose of demonstration. While a single projection demonstration is being performed, since the turntable 14 is in a rotating state driven by the first motor 9, the multiple rotating projection film holders 15 correspond to the images of different stages of stellar changes. The image contents demonstrated include a full-day starry sky map, a full-day starry sky map with a calendar, a movement map of the Big Dipper, the North Star and Cassiopeia, a moon phase change map, a sun, earth and moon movement map, a earth-moon system movement map, an eight planet movement map, and a Big Dipper and North Star movement map. The demonstration content can also be replaced with other starry sky maps as required. It has a replaceable function. When the turntable 14 rotates, the multiple rotating projection film holders 15 are moved to the upper position of the optical lens 26 in sequence. At this time, in the demonstration The changing stages of the stars can be demonstrated completely and continuously at the same time. When the rotating projection holder 15 is switched to demonstrate the changing stages of the stars, the second motor 17 can drive the second shaft 18 to rotate. When the second shaft 18 rotates, it drives the fourth gear 19 to rotate accordingly. Through the rotation of the fourth gear 19, the sixth gear 21 can be driven to rotate accordingly through the meshing with the fifth gear 20. Through the rotation of the sixth gear 21, since the sixth gear 21 is in meshing state with multiple third gears 16 on the outside, the third gear 16 can be driven to rotate accordingly when the sixth gear 21 rotates. The rotating projection holder 15 can be driven to rotate through the rotation of the third gear 16. That is, when the rotating projection holder 15 cooperates with the optical lens 26 for projection,When multiple rotating projection film holders 15 are in a rotating switching state, a single rotating projection film holder 15 is also in a rotating state. When a star state of a rotating projection film holder 15 is displayed, the projection demonstrated is a rotation state simulating the movement of the starry sky. The demonstrator is driven and operated by the first motor 9 and the second motor 17 in conjunction with a simple mechanical structure, so that the projection can fully demonstrate the changing images of the stars in motion, and the demonstrated starry sky movement direction is consistent with the actual starry sky movement direction, which solves the problem that the direction in the textbook and the actual direction are difficult to integrate. At the same time, when the demonstrator is running, through the use of the thermal pad 25, the thermal pad 25 with a certain elasticity is filled between the first partition plate 3 and the heat dissipation fin 24 That is, the use of the thermal pad 25 can efficiently conduct the heat generated by the operation of the optical lens 26. After the heat is conducted to the position of the heat dissipation fin 24, the setting of the larger contact area between the heat dissipation fin 24 and the air, in conjunction with the operation of the cooling fan 23, can efficiently discharge the heat generated by the operation of the optical lens 26, thereby improving the heat dissipation efficiency of the demonstrator. The baffle 41 can be rotated to a position covering the top of the optical lens seat 34, and the position of the rotating block 39 can be clamped and fixed by screwing the nut 40. At this time, the setting of the smaller groove on the surface of the baffle 41 can cover the optical lens seat 34. After the covering is completed, the visible starry sky can be simulated, that is, the starry sky state seen by the human eye on different dates.

[0034] The wiring diagram of the first motor 9, the cooling fan 23, the optical lens 26, the remote control panel 27, the control panel 30 and the control button 31 in the present invention is common knowledge in the art, and its working principle is a well-known technology. The model is selected according to the actual use. Therefore, the control method and wiring arrangement of the first motor 9, the cooling fan 23, the optical lens 26, the remote control panel 27, the control panel 30 and the control button 31 are no longer explained in detail.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable projection-type rotating starry sky demonstrator convenient to use, comprising a base plate (1) and a sleeve ring (35), characterized in that: The bottom corners of the bottom plate (1) are all fixedly connected with first columns (2), the upper end surfaces of the plurality of first columns (2) are all fixedly connected with first partitions (3), the top edges of the first partitions (3) are all fixedly connected with second columns (4), the upper end surfaces of the plurality of second columns (4) are all fixedly connected with second partitions (5), the tops of the second partitions (5) are all fixedly connected with a plurality of third columns (6), the upper end surfaces of the plurality of third columns (6) are all fixedly connected with a third partition (7), the bottom of the second partition (5) is fixedly connected with a first motor (9), the output end of the first motor (9) passes through the second partition (5) and extends to the upper side, the output end of the first motor (9) is fixedly connected with a first rotating shaft (10), the upper end surface of the first rotating shaft (10) is fixedly connected with a first gear (11), and the second partition (5) is fixedly connected with a first motor (9). The top of the plate (5) is fixedly connected to a support shaft (12); the upper end surface of the support shaft (12) is fixedly connected to a second gear (13); the top of the second gear (13) is fixedly connected to a turntable (14); the top of the turntable (14) is evenly rotatably connected to a plurality of rotating projection film seats (15); the top of the first partition plate (3) is fixedly connected to an optical lens (26); the top of the bottom plate (1) is fixedly connected to a housing (29); the top of the housing (29) is fixedly connected to a top plate (28); the top of the top plate (28) is fixedly connected to an optical focusing lens seat (32); an optical lens fixing ring (33) is provided on the top of the optical focusing lens seat (32); an optical lens fixing ring (33) is provided on the top of the optical lens fixing ring (33); the optical lens seat (34) is matched with the rotating projection film seat (15) in position.

2. The portable projection-type rotating starry sky demonstrator according to claim 1 is characterized in that: The top of the second partition plate (5) is provided with an avoidance groove, the optical lens (26) is located inside the avoidance groove, and the top of the optical lens (26) is located above the second partition plate (5).

3. The portable projection-type rotating starry sky demonstrator according to claim 2 is characterized in that: A plurality of through holes are evenly formed on the top of the turntable (14), the through holes being matched with the positions of the rotating projection film holder (15), and the optical lens (26) being matched with the rotation path of the rotating projection film holder (15).

4. The portable projection-type rotating starry sky demonstrator according to claim 1 is characterized in that: The second gear (13) is meshedly connected with the first gear (11); the thickness of the first gear (11) is smaller than the thickness of the second gear (13); and the first gear (11) is located at the lower side of the rotating disk (14).

5. The portable projection-type rotating starry sky demonstrator according to claim 1 is characterized in that: A second motor (17) is fixedly connected to the top of the third partition plate (7); an output end of the second motor (17) passes through the third partition plate (7) and extends to the lower side; a second rotating shaft (18) is fixedly connected to the output end of the second motor (17); and a fourth gear (19) is fixedly connected to the lower end surface of the second rotating shaft (18).

6. The portable projection-type rotating starry sky demonstrator according to claim 5 is characterized in that: The top of the rotating disk (14) is rotatably connected to a rotating seat (22), the top of the rotating seat (22) is fixedly connected to a sixth gear (21), the top of the sixth gear (21) is fixedly connected to a fifth gear (20), and the fifth gear (20) is meshingly connected to the fourth gear (19).

7. The portable projection-type rotating starry sky demonstrator according to claim 6 is characterized in that: The outer surfaces of the plurality of rotating projection film holders (15) are all fixedly connected with third gears (16), and the plurality of third gears (16) are evenly distributed at positions outside the sixth gear (21), and the third gears (16) are meshingly connected with the sixth gear (21).

8. The portable projection-type rotating starry sky demonstrator according to claim 1 is characterized in that: A cooling fan (23) is symmetrically fixedly connected to the top of the base plate (1), and a cooling fin (24) is fixedly connected to the top of the base plate (1), wherein the cooling fin (24) is located between the two cooling fans (23).

9. The portable projection-type rotating starry sky demonstrator according to claim 1 is characterized in that: The heat dissipation fins (24) are matched with the optical lenses (26) in position, a heat conduction pad (25) is arranged on the top of the heat dissipation fins (24), and the top of the heat conduction pad (25) is in contact with the bottom of the first partition plate (3).

10. The portable projection-type rotating starry sky demonstrator according to claim 1 is characterized in that: The top of the third partition plate (7) is fixedly connected to a remote control panel (27); the top of the top plate (28) is fixedly connected to a control panel (30); the top of the top plate (28) is fixedly connected to a control button (31); the control button (31) and the control panel (30) are arranged in a matching manner; the control panel (30) and the remote control panel (27) are electrically connected; the collar (35) is located at an outer position of the optical lens seat (34); the outer surface of the collar (35) is fixedly connected to a side block (36); the top of the side block (36) is fixedly connected to a positioning seat (37); the top of the positioning seat (37) is fixedly connected to a threaded rod (38); the outer surface of the threaded rod (38) is provided with a rotating block (39); the outer surface of the rotating block (39) is fixedly connected to a baffle (41); the outer surface of the threaded rod (38) is threadedly connected to a nut (40); the nut (40) is located at an upper position of the rotating block (39); and the baffle (41) is located at an upper position of the optical lens seat (34).

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