Drawing three-dimensional teaching aid model capable of being rapidly adjusted

Abstract

The invention discloses a drawing three-dimensional teaching aid model capable of being rapidly adjusted, and relates to the technical field of drawing teaching aid models, the drawing three-dimensional teaching aid model comprises a body mechanism, the body mechanism comprises a base, and an adjusting mechanism is arranged above the base; the adjusting mechanism comprises a rotating unit, the rotating unit is located above the base, and the rotating unit is used for carrying out rapid projection display on a side view of the model; the adjusting mechanism further comprises an overturning unit, the overturning unit is located above the base, the rotating unit is used in cooperation with the overturning unit, and the overturning unit is used for conducting rapid projection display on the upward view and the top view of the model. A rotating mechanism is arranged above the base, the adjusting mechanism is used in cooperation with the rotating mechanism, the rotating mechanism is used for performing multi-angle rotating display on the model, according to the three-dimensional teaching aid model capable of being rapidly adjusted and used for drawing, the projection screen plate always faces students through arrangement of the rotating unit, and therefore it is avoided that teachers frequently adjust the rotating position, and the teaching efficiency is improved. Therefore, the demonstration efficiency of model drawing is improved.

Description

Technical Field

[0001] This invention relates to the field of drafting teaching aids and models, specifically a three-dimensional drafting teaching aid model that can be quickly adjusted. Background Technology

[0002] Three-dimensional teaching aids for drafting are core teaching tools that connect two-dimensional drafting drawings with three-dimensional physical structures. Through this device, students can intuitively understand abstract drafting concepts, overcome learning difficulties, and cultivate their spatial imagination and shape analysis abilities, thereby helping them to draw better drawings.

[0003] In the use of existing 3D teaching aids for drafting, most of them have a certain degree of structural adjustment capability. However, since the adjustment of the teaching aids mostly relies on connecting parts such as bolts and buckles, teachers need to loosen, adjust, and tighten them one by one when making adjustments, which consumes a lot of the teacher's class time. As a result, the device has the problem of low teaching demonstration efficiency.

[0004] Combining the above issues, we find that existing 3D teaching aids for drafting that can be quickly adjusted on the market cannot simultaneously avoid the problems mentioned above when used. Even if they can be solved, they require the use of external tools, thus failing to achieve the desired effect. Therefore, we propose a 3D teaching aid model for drafting that can be quickly adjusted. Summary of the Invention

[0005] The purpose of this invention is to provide a three-dimensional teaching aid model for drafting that can be quickly adjusted, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a three-dimensional teaching aid model for drafting that can be quickly adjusted, including a main body mechanism, wherein the main body mechanism includes a base, and an adjustment mechanism is provided above the base; The adjustment mechanism includes a rotating unit located above the base, which is used to quickly project and display the side view of the model. The adjustment mechanism also includes a flipping unit, which is located above the base. The rotating unit works in conjunction with the flipping unit, which is used to quickly project and display the model's top and bottom views. A rotating mechanism is provided above the base. The adjusting mechanism works in conjunction with the rotating mechanism, which is used to rotate the model at multiple angles for display.

[0007] Preferably, the rotating unit includes a first toothed plate located above the base. A second toothed plate is rotatably connected to the upper surface of the first toothed plate. A connecting bearing and a placement platform are fixedly mounted on the upper surface of the second toothed plate. A toothed ring is fixedly mounted on the upper surface of the inner ring of the connecting bearing. Two rotating shafts are rotatably connected to the upper surface of the first toothed plate. A connecting gear and a transmission gear are fixedly mounted on the outer surface of each rotating shaft. The outer surfaces of the second toothed plate and the toothed ring mesh with the outer surfaces of the two connecting gears, respectively. The outer surfaces of the two transmission gears mesh with each other. A take-up roller is fixedly installed on the outer surface of the rotating shaft, and a traction rope is fixedly installed on the outer surface of the take-up roller. A connecting cylinder is fixedly installed on the upper surface of the first toothed plate. One end of the traction rope passes through the connecting cylinder and is fixedly installed with a load-bearing block. An electromagnet is fixedly installed on the outer surface of the load-bearing block. The outer surface of the electromagnet is slidably connected to the inner wall of the connecting cylinder. A connecting frame is fixedly installed on the upper surface of the connecting cylinder and the upper surface of the first toothed plate. A limit roller is rotatably connected inside each connecting frame. The outer surface of the traction rope is in contact with the outer surface of the limit roller. The projector body and the projection plate are fixedly installed on the upper surface of the toothed ring, respectively.

[0008] Preferably, a fixed bearing is fixedly installed on the bottom surface of the second toothed plate, and the bottom surface of the inner ring of the fixed bearing is fixedly connected to the upper surface of the first toothed plate.

[0009] Preferably, the flipping unit includes a placement frame, the bottom surface of which is fixedly connected to the upper surface of the placement platform. A rotating shaft is rotatably connected inside the placement frame, and a connecting platform is fixedly installed on the outer surface of the rotating shaft. A model body is positioned above the connecting platform, and a connecting groove is formed on the bottom surface of the model body. A connector is fixedly installed on the upper surface of the connecting platform, and the connector is snapped into the connecting groove. Two shape memory alloy blocks are fixedly installed on the inner wall of the connector. Limit blocks are fixedly installed on the sides of the two shape memory alloy blocks that are far apart from each other, and a heating tube is fixedly installed on the sides of the two shape memory alloy blocks that are close to each other. A mounting frame is fixedly installed on the upper surface of the placement platform, and an electric push rod is fixedly installed on the inner wall of the mounting frame. A rack plate is fixedly installed on the telescopic end of the electric push rod. A fixed gear is fixedly installed on one end of the rotating shaft, and the outer surface of the fixed gear meshes with the upper surface of the rack plate. A moving block is fixedly installed on the outer surface of the rack plate. Two connecting springs and a touch switch are fixedly installed on the inner wall of the mounting frame, and a trigger plate is fixedly installed on one end of the two connecting springs.

[0010] Preferably, a slider is fixedly installed on the bottom surface of the rack plate, and a groove is provided on the inner wall of the mounting bracket, with the slider slidably connected inside the groove.

[0011] Preferably, two telescopic columns are fixedly installed on the inner wall of the mounting bracket, and the telescopic end of each telescopic column is fixedly connected to the outer surface of the trigger plate.

[0012] Preferably, the rotating mechanism includes a rotating column, the bottom end of which is rotatably connected to the upper surface of the base. A connecting piece and an adjusting gear are fixedly mounted on the outer surface of the rotating column, the outer surface of the adjusting gear meshing with the outer surface of the first toothed plate. A rotating motor is fixedly mounted on the upper surface of the base, the output end of the rotating motor is fixedly mounted with the rotating column, a rotating component is fixedly mounted on the top of the rotating column, a first conical wheel is fixedly mounted on the outer surface of the rotating column, a bearing seat is fixedly mounted on the upper surface of the base, a rotating rod is rotatably connected inside the bearing seat, and a second conical wheel is fixedly mounted on one end of the rotating rod. The base has a conical wheel, the outer surface of the second conical wheel meshes with the outer surface of the first conical wheel, an air intake fan is fixedly installed at the other end of the rotating rod, an air intake frame is fixedly installed on the upper surface of the base, a conveying pipe is fixedly connected to one side of the air intake frame, a venturi tube is fixedly installed on the upper surface of the base, one end of the conveying pipe extends into the interior of the venturi tube, several suction cups are fixedly installed on the inner wall of the base, the upper surfaces of the several suction cups are fixedly connected to an installation tube, a connecting tube is fixedly connected to the outer surface of the venturi tube, one end of the connecting tube extends into the interior of the installation tube, and a controller is fixedly installed on the upper surface of the base.

[0013] Preferably, a limiting bearing is fixedly installed on the bottom surface of the first toothed plate, and the bottom surface of the inner ring of the limiting bearing is fixedly connected to the upper surface of the base.

[0014] Preferably, a storage battery is fixedly installed on the upper surface of the base, and the storage battery is electrically connected to the rotating motor through wires.

[0015] Preferably, a protective box is fixedly installed on the upper surface of the base, and a protective cover is rotatably hinged to the upper surface of the protective box.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention incorporates a rotating unit, allowing the teacher to rotate the rotating shaft during use. This rotating shaft, in conjunction with the connecting gear and the transmission gear, drives the second toothed plate and the toothed ring to rotate in opposite directions. This ensures that when projecting the side view of the model, the projection panel always faces the students, thus avoiding the need for the teacher to frequently adjust the rotation position and increasing the efficiency of model drawing demonstrations.

[0017] 2. This invention, by incorporating a flipping unit, allows teachers to quickly project and demonstrate the bottom and top views of the model body. Simultaneously, the model body is automatically locked during the flipping process and automatically unlocked when it returns to the initial position, thus facilitating quick switching of the model body by teachers and further increasing the demonstration efficiency of model drawing.

[0018] 3. This invention incorporates a rotating mechanism, allowing the device to rotate automatically and project the drawing onto different surfaces, thus facilitating viewing for students in various positions. Furthermore, the rotation process prevents movement or tilting, avoiding any misalignment of the drawing projection and eliminating the need for manual adjustments by the teacher, thereby further increasing the efficiency of the drawing demonstration. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the placement platform of the present invention; Figure 3 This is a structural schematic diagram of the cross-sectional view of the platform for this invention; Figure 4 This is a schematic diagram of the connecting cylinder of the present invention; Figure 5 This is a schematic diagram of the cross-sectional view of the connecting cylinder of the present invention; Figure 6 This is a schematic diagram of the structure of the placement rack of the present invention; Figure 7 This is a structural schematic diagram of the mounting bracket of the present invention from the rear view. Figure 8 This is a schematic diagram of the cross-sectional view of the main body of the model of the present invention; Figure 9 This is a schematic diagram of the cross-sectional view of the connector of the present invention; Figure 10 This is a schematic diagram of the cross-sectional view of the first toothed plate of the present invention; Figure 11 This is a schematic diagram of the rotating component of the present invention; Figure 12 This is a structural schematic diagram of the cross-sectional view of the base of the present invention; Figure 13 This is a structural schematic diagram of the cross-sectional view of the protective box of the present invention.

[0020] In the diagram: 1. Main body mechanism; 11. Base; 2. Adjustment mechanism; 21. Rotating unit; 2101. Second toothed plate; 2102. Connecting bearing; 2103. Toothed ring; 2104. Placement platform; 2105. Rotating shaft; 2106. Connecting gear; 2107. Transmission gear; 2108. Take-up roller; 2109. Traction rope; 2110. Connecting cylinder; 2111. Load-bearing block; 2112. Electromagnet; 21 13. Connecting frame; 2114. Limiting roller; 2115. Projector body; 2116. Projection panel; 2117. Fixed bearing; 2118. First toothed plate; 22. Flipping unit; 2201. Placement frame; 2202. Rotation shaft; 2203. Connecting platform; 2204. Model body; 2205. Connecting groove; 2206. Connector; 2207. Shape memory alloy block; 2208. Limiting block; 2209. Heating element. 2210. Pipe; 2211. Mounting bracket; 2212. Electric push rod; 2213. Rack plate; 2214. Moving block; 2215. Connecting spring; 2216. Trigger plate; 2217. Touch switch; 2218. Slider; 2219. Slide rail; 2210. Telescopic column; 2220. Fixed gear; 3. Rotating mechanism; 301. Limit bearing; 302. Rotating column; 303. Connecting part; 304. Adjusting gear; 30 5. Rotating motor; 306. Rotating column; 307. Rotating component; 308. First conical wheel; 309. Bearing seat; 310. Rotating rod; 311. Second conical wheel; 312. Intake fan; 313. Intake frame; 314. Venturi tube; 315. Conveying pipe; 316. Suction cup; 317. Mounting pipe; 318. Connecting pipe; 319. Controller; 320. Battery; 321. Protective box; 322. Protective cover. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1-5 The present invention provides a technical solution: a three-dimensional teaching aid model for drawing that can be quickly adjusted, including a main body mechanism 1, the main body mechanism 1 including a base 11, and an adjustment mechanism 2 disposed above the base 11; The adjustment mechanism 2 includes a rotation unit 21, which is located above the base 11. The rotation unit 21 is used to quickly project and display the side view of the model.

[0023] As a further definition of the rotating unit 21 of the present invention, the rotating unit 21 includes a first toothed plate 2118, which is located above the base 11. A second toothed plate 2101 is rotatably connected to the upper surface of the first toothed plate 2118. A connecting bearing 2102 and a placement platform 2104 are fixedly mounted on the upper surface of the second toothed plate 2101. A toothed ring 2103 is fixedly mounted on the upper surface of the inner ring of the connecting bearing 2102. Two rotating shafts 2105 are rotatably connected to the upper surface of the first toothed plate 2118. A connecting gear 2106 and a transmission gear 2107 are fixedly mounted on the outer surface of each rotating shaft 2105. The outer surface of the second toothed plate 2101 and the toothed ring 2103 are... The outer surfaces of the two gears 2106 mesh with each other, and the outer surfaces of the two transmission gears 2107 mesh with each other. A winding roller 2108 is fixedly installed on the outer surface of one of the rotating shafts 2105, and a traction rope 2109 is fixedly installed on the outer surface of the winding roller 2108. A connecting cylinder 2110 is fixedly installed on the upper surface of the first toothed plate 2118. The connecting cylinder 2110 is made of metal. One end of the traction rope 2109 passes through the connecting cylinder 2110 and is fixedly installed with a load-bearing block 2111. An electromagnet 2112 is fixedly installed on the outer surface of the load-bearing block 2111. The outer surface of the electromagnet 2112 is slidably connected to the inner wall of the connecting cylinder 2110, thereby enabling the traction rope 2109 to pull. When the load-bearing block 2111 moves to the designated position, the power supply to the electromagnet 2112 is turned on. This utilizes the magnetism between the electromagnet 2112 and the connecting cylinder 2110 to fix the load-bearing block 2111 in the designated position. Connecting frames 2113 are fixedly installed on the upper surface of the connecting cylinder 2110 and the upper surface of the first toothed plate 2118. Each connecting frame 2113 has a rotatably connected limit roller 2114 inside. The outer surface of the traction rope 2109 contacts the outer surface of the limit roller 2114. Therefore, when the teacher needs to change or adjust the position, the power supply to the electromagnet 2112 is turned off. Under the weight of the load-bearing block 2111, the take-up roller 2108 is pulled to rotate, thereby causing the second toothed plate 2101 to... The toothed ring 2103 returns to its initial position, i.e., the front view of the model, thus achieving the purpose of automatic reset of the device. The projector body 2115 and the projection plate 2116 are fixedly installed on the upper surface of the toothed ring 2103. By setting up a rotating unit 21, when the device is in use, the teacher rotates the rotating shaft 2105, which in turn drives the second toothed plate 2101 and the toothed ring 2103 to rotate in opposite directions in conjunction with the connecting gear 2106 and the transmission gear 2107. Thus, when projecting the side view of the model, the projection plate 2116 always faces the students, thereby avoiding the teacher from frequently adjusting the rotation position and increasing the demonstration efficiency of model drawing.

[0024] Please see Figure 3A fixed bearing 2117 is fixedly installed on the bottom surface of the second toothed plate 2101. The bottom surface of the inner ring of the fixed bearing 2117 is fixedly connected to the upper surface of the first toothed plate 2118. The installation of the fixed bearing 2117 plays a role in stabilizing the second toothed plate 2101, thereby preventing the second toothed plate 2101 from shaking when rotating, and thus ensuring the stability of the second toothed plate 2101.

[0025] The specific implementation of this embodiment is as follows: When the teacher is demonstrating drawing, the projector body 2115 projects the model placed on the platform 2104, so that the front view of the model is projected onto the projection screen 2116. When it is necessary to switch the view of the model, the teacher rotates the rotating shaft 2105, which, in conjunction with the transmission gear 2107, drives the two connecting gears 2106 to rotate. This causes the two connecting gears 2106 to drive the second toothed plate 2101 and the toothed ring 2103 to rotate in opposite directions, so that when the teacher switches views, the projection screen... The board 2116 always faces the student, eliminating the need for secondary adjustments by the teacher and thus increasing the efficiency of the drawing demonstration. Simultaneously, as the rotating shaft 2105 rotates, it drives the take-up roller 2108 to rotate, causing the take-up roller 2108 to wind up the traction rope 2109. This causes the traction rope 2109 to pull the load-bearing block 2111 upwards. When the view switching position is reached, the teacher activates the electromagnet 2112 via an external remote control device. The electromagnet 2112 then magnetically attaches to the connecting cylinder 2110, fixing the load-bearing block 2111 in the desired position. When the teacher performs the view switching... Figure 2 During the next switch, the teacher first disconnects the magnetism of the electromagnet 2112 using an external remote control device, so that under the action of the weight block 2111, the traction rope 2109 drives the take-up roller 2108 to rotate, and then returns to the position of the front view. Then the above process is repeated to switch the view of the drawing.

[0026] Example 2: Please refer to Figure 1 and Figures 6-9 The present invention provides a technical solution: a three-dimensional teaching aid model for drawing that can be quickly adjusted. The present invention makes corresponding improvements to the technical problems mentioned in the background art. The adjustment mechanism 2 also includes a flipping unit 22, which is located above the base 11. The rotating unit 21 is used in conjunction with the flipping unit 22. The flipping unit 22 is used to quickly project and display the model's bottom and top views.

[0027] As a further definition of the flipping unit 22 of the present invention, the flipping unit 22 includes a placement frame 2201, the bottom surface of which is fixedly connected to the upper surface of the placement platform 2104. A rotating shaft 2202 is rotatably connected inside the placement frame 2201, and a connecting platform 2203 is fixedly mounted on the outer surface of the rotating shaft 2202. A model body 2204 is disposed above the connecting platform 2203. The connecting platform 2203 is made of high-strength transparent acrylic, allowing projection light to pass through it, thus projecting the drawing. This is equivalent to the model body 2204 being in a suspended state. A connecting groove 2205 is provided on the bottom surface of the model body 2204. There are multiple model bodies 2204, and each model body 2204... The bottom surface of component 4 is provided with a connecting groove 2205. A connector 2206 is fixedly installed on the upper surface of the connecting platform 2203. The connector 2206 has two heat dissipation vents extending to the outside of the connecting platform 2203. The connector 2206 is snapped into the inside of the connecting groove 2205. Two shape memory alloy blocks 2207 are fixedly installed on the inner wall of the connector 2206. Limiting blocks 2208 are fixedly installed on the side of the two shape memory alloy blocks 2207 that are far apart from each other. A heating tube 2209 is fixedly installed on the side of the two shape memory alloy blocks 2207 that are close to each other. Utilizing the thermal expansion property of the shape memory alloy block 2207, when the shape memory alloy block 2207 is heated, the shape memory alloy block 2208 will push the limiting blocks 2208. 8. The connector 2206 is disengaged from the interior, thus engaging with the connecting slot 2205, thereby locking the model body 2204. A mounting bracket 2210 is fixedly mounted on the upper surface of the placement platform 2104. An electric push rod 2211 is fixedly mounted on the inner wall of the mounting bracket 2210. A rack plate 2212 is fixedly mounted on the telescopic end of the electric push rod 2211. A fixed gear 2220 is fixedly mounted on one end of the rotating shaft 2202. The outer surface of the fixed gear 2220 meshes with the upper surface of the rack plate 2212. A moving block 2213 is fixedly mounted on the outer surface of the rack plate 2212. Two connecting springs 2214 and a touch switch 2216 are fixedly mounted on the inner wall of the mounting bracket 2210. The touch switch 2216 controls… The heating element 2209 is heated. One end of the two connecting springs 2214 is fixedly mounted with a trigger plate 2215. The trigger plate 2215, located in the front view position of the model body 2204, has a groove, which allows the moving block 2213 to enter the groove position, thereby stopping the triggering of the touch switch 2216. By setting a flipping unit 22, the teacher can quickly project and demonstrate the bottom and top views of the model body 2204. At the same time, the model body 2204 is automatically locked during the flipping process and automatically unlocked when it returns to the initial position, which facilitates the teacher to quickly switch the model body 2204 and further increases the demonstration efficiency of model drawing.

[0028] Please see Figure 7A slider 2217 is fixedly installed on the bottom surface of the rack plate 2212. A groove 2218 is provided on the inner wall of the mounting bracket 2210. The slider 2217 is slidably connected inside the groove 2218. The installation of the slider 2217 and the groove 2218 restricts the movement trajectory of the rack plate 2212, thereby preventing the rack plate 2212 from deviating from the movement trajectory when moving, and thus ensuring the stability of the rack plate 2212.

[0029] Please see Figure 7 Two telescopic columns 2219 are fixedly installed on the inner wall of the mounting bracket 2210. The telescopic end of each telescopic column 2219 is fixedly connected to the outer surface of the trigger plate 2215. The installation of the telescopic columns 2219 plays a role in restricting the movement trajectory of the trigger plate 2215, thereby ensuring the stability of the movement of the trigger plate 2215.

[0030] The specific implementation of this embodiment is as follows: In use, the model body 2204 to be projected is first placed on the connecting platform 2203, and the connector 2206 is inserted into the connecting groove 2205. When projecting the model body 2204 in both bottom and top views, the power provided by the electric push rod 2211 drives the rack plate 2212 to move, thereby causing the rack plate 2212 to drive the fixed gear 2220 to rotate. This, in turn, causes the fixed gear 2220 to drive the rotating shaft 2202 and the connecting platform 2203 to rotate. During the movement of the rack plate 2212, the moving block 2213 moves, causing the moving block 2213 to press against the trigger plate 2215, thereby causing... The trigger plate 2215 triggers the touch switch 2216, causing the heating tube 2209 to quickly heat the shape memory alloy block 2207. This causes the shape memory alloy block 2207 to expand and push the limiting block 2208 into the connection slot 2205, thereby locking the model body 2204 and preventing it from falling off during the flipping process. When the model body 2204 reaches the front view position, the touch switch 2216 stops triggering, causing the shape memory alloy block 2207 to return to its original shape. This causes the limiting block 2208 to move into the connector 2206, thereby unlocking it. This allows teachers to quickly switch the model body 2204, further increasing the efficiency of teachers' drawing demonstrations.

[0031] Example 3: Please refer to Figure 1 and Figures 10-13 The present invention provides a technical solution: a three-dimensional teaching aid model for drawing that can be quickly adjusted. The present invention makes corresponding improvements to the technical problems mentioned in the background art. A rotating mechanism 3 is provided above the base 11. The adjusting mechanism 2 is used in conjunction with the rotating mechanism 3. The rotating mechanism 3 is used to rotate the model from multiple angles for display.

[0032] As a further definition of the rotating mechanism 3 of the present invention, the rotating mechanism 3 includes a rotating column 302, the bottom end of which is rotatably connected to the upper surface of the base 11. A connecting member 303 and an adjusting gear 304 are fixedly mounted on the outer surface of the rotating column 302. The outer surface of the adjusting gear 304 meshes with the outer surface of the first toothed plate 2118. A rotating motor 305 is fixedly mounted on the upper surface of the base 11. A rotating column 306 is fixedly mounted on the output end of the rotating motor 305. A rotating component 307 is fixedly mounted on the top end of the rotating column 306. 307 and connector 303 form the Maltese cross movement mechanism, causing the rotating column 302 to rotate intermittently, thus facilitating viewing for students in different positions. A first conical wheel 308 is fixedly mounted on the outer surface of the rotating column 306, and a bearing seat 309 is fixedly mounted on the upper surface of the base 11. A rotating rod 310 is rotatably connected inside the bearing seat 309. A second conical wheel 311 is fixedly mounted on one end of the rotating rod 310, and the outer surface of the second conical wheel 311 meshes with the outer surface of the first conical wheel 308. The other end of the rotating rod 310 is fixed... An intake fan 312 is installed. An intake frame 313 is fixedly installed on the upper surface of the base 11. A delivery pipe 315 is fixedly connected to one side of the intake frame 313. A venturi tube 314 is fixedly installed on the upper surface of the base 11. One end of the delivery pipe 315 extends into the interior of the venturi tube 314. Several suction cups 316 are fixedly installed on the inner wall of the base 11. The upper surfaces of the suction cups 316 are all fixedly connected to an installation pipe 317. A connecting pipe 318 is fixedly connected to the outer surface of the venturi tube 314. One end of the connecting pipe 318 extends into the interior of the installation pipe 317. The upper surface of the base 11 is fixedly equipped with a controller 319. Utilizing the Venturi effect, the air between the suction cup 316 and the lectern is expelled, thereby allowing the device to be firmly adhered to the lectern. By setting a rotating mechanism 3, the device can rotate on its own, allowing the drawing projection to face different positions, thus facilitating viewing for students in different locations. At the same time, during the rotation, it avoids movement and tipping, preventing the drawing projection from becoming disordered. It eliminates the need for teachers to manually adjust it, further increasing the efficiency of drawing demonstrations.

[0033] Please see Figure 10 A limit bearing 301 is fixedly installed on the bottom surface of the first toothed plate 2118. The bottom surface of the inner ring of the limit bearing 301 is fixedly connected to the upper surface of the base 11. The installation of the limit bearing 301 plays a role in stabilizing the first toothed plate 2118, thereby preventing the first toothed plate 2118 from shaking when rotating.

[0034] Please see Figure 13A storage battery 320 is fixedly installed on the upper surface of the base 11. The storage battery 320 is electrically connected to the electromagnet 2112, the projector body 2115, the heating tube 2209, the electric push rod 2211, the touch switch 2216, the rotary motor 305 and the controller 319 through wires and contact pads. The installation of the storage battery 320 can provide power to the electrical equipment of the device, so that the device is not limited by the length of the wires.

[0035] Please see Figure 1 and Figure 13 A protective box 321 is fixedly installed on the upper surface of the base 11, and a protective cover 322 is rotatably hinged to the upper surface of the protective box 321. The installation of the protective box 321 and the protective cover 322 serves to provide safety protection for the controller 319 and the battery 320.

[0036] The specific implementation of this embodiment is as follows: When the teacher needs to display the drawing projection from different directions, the teacher turns on the rotating motor 305 through an external remote control device. The power provided by the rotating motor 305 drives the rotating column 306 to rotate, which in turn drives the rotating component 307 to rotate. The rotating component 307 intermittently drives the connecting component 303 to rotate, thereby causing the connecting component 303, in conjunction with the rotating column 302 and the adjusting gear 304, to drive the first toothed plate 2118 to rotate, thus displaying the drawing from different directions. While the rotating motor 305 is running, the first conical wheel 308 and the second conical wheel 311 mesh with each other. This causes the intake fan 312 to rotate, which in turn delivers gas into the intake frame 313. The gas then passes through the delivery pipe 315 and enters the venturi tube 314. Under the effect of the venturi effect, the gas between the suction cup 316 and the lectern passes through the mounting pipe 317 and the connecting pipe 318 and is then discharged from the venturi tube 314. This ensures the stability of the device and prevents the device from tilting and collapsing when the first toothed plate 2118 rotates. When the first toothed plate 2118 rotates to a certain angle, the rotation motor 305 is controlled to rotate in the opposite direction by an external remote control device to prevent the first toothed plate 2118 from always rotating in one direction.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional teaching aid model for drafting that can be quickly adjusted, comprising a main body mechanism (1), characterized in that: The main body mechanism (1) includes a base (11), and an adjustment mechanism (2) is provided above the base (11). The adjustment mechanism (2) includes a rotating unit (21) located above the base (11). The rotating unit (21) is used to quickly project and display the side view of the model. The adjustment mechanism (2) also includes a flipping unit (22), which is located above the base (11). The rotating unit (21) works in conjunction with the flipping unit (22), which is used to quickly project and display the model's upward and downward views. A rotating mechanism (3) is provided above the base (11). The adjusting mechanism (2) works in conjunction with the rotating mechanism (3). The rotating mechanism (3) is used to rotate the model from multiple angles for display.

2. The three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 1, characterized in that: The rotating unit (21) includes a first toothed plate (2118), which is located above the base (11). A second toothed plate (2101) is rotatably connected to the upper surface of the first toothed plate (2118). A connecting bearing (2102) and a placement platform (2104) are fixedly installed on the upper surface of the second toothed plate (2101). A toothed ring (2103) is fixedly installed on the upper surface of the inner ring of the connecting bearing (2102). The first toothed plate... The upper surface of the plate (2118) is rotatably connected to two rotating shafts (2105). A connecting gear (2106) and a transmission gear (2107) are fixedly mounted on the outer surface of each rotating shaft (2105). The outer surface of the second toothed plate (2101) and the outer surface of the toothed ring (2103) mesh with the outer surfaces of the two connecting gears (2106), respectively. The outer surfaces of the two transmission gears (2107) mesh with each other. The outer surface of one of the rotating shafts (2105)... A take-up roller (2108) is fixedly installed, and a traction rope (2109) is fixedly installed on the outer surface of the take-up roller (2108). A connecting cylinder (2110) is fixedly installed on the upper surface of the first toothed plate (2118). One end of the traction rope (2109) passes through the connecting cylinder (2110) and is fixedly installed with a load-bearing block (2111). An electromagnet (2112) is fixedly installed on the outer surface of the load-bearing block (2111). The outer surface of the electromagnet (2112) is connected to the connecting cylinder (2110). The inner wall of the connecting cylinder (2110) is slidably connected. The upper surface of the connecting cylinder (2110) and the upper surface of the first toothed plate (2118) are both fixedly installed with connecting frames (2113). Each connecting frame (2113) is rotatably connected with a limiting roller (2114). The outer surface of the traction rope (2109) is in contact with the outer surface of the limiting roller (2114). The upper surface of the toothed ring (2103) is fixedly installed with the projector body (2115) and the projection plate (2116).

3. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 2, characterized in that: A fixed bearing (2117) is fixedly installed on the bottom surface of the second toothed plate (2101), and the bottom surface of the inner ring of the fixed bearing (2117) is fixedly connected to the upper surface of the first toothed plate (2118).

4. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 2, characterized in that: The flipping unit (22) includes a placement frame (2201), the bottom surface of which is fixedly connected to the upper surface of the placement platform (2104). A rotating shaft (2202) is rotatably connected inside the placement frame (2201). A connecting platform (2203) is fixedly installed on the outer surface of the rotating shaft (2202). A model body (2204) is positioned above the connecting platform (2203). A connecting groove (2205) is formed on the bottom surface of the model body (2204). A connector (2206) is fixedly installed on the upper surface of the connecting platform (2203). The connector (2206) is snapped into the connecting groove (2205). Two shape memory alloy blocks (2207) are fixedly installed on the inner wall of the connector (2206). Limiting blocks (2208) are fixedly installed on the opposite sides of the two shape memory alloy blocks (2207). Heating tubes (2209) are fixedly installed on one side of each of the memory alloy blocks (2207) that are close to each other. A mounting bracket (2210) is fixedly installed on the upper surface of the placement platform (2104). An electric push rod (2211) is fixedly installed on the inner wall of the mounting bracket (2210). A rack plate (2212) is fixedly installed on the telescopic end of the electric push rod (2211). A fixed gear (2220) is fixedly installed on one end of the rotating shaft (2202). The outer surface of the fixed gear (2220) meshes with the upper surface of the rack plate (2212). A moving block (2213) is fixedly installed on the outer surface of the rack plate (2212). Two connecting springs (2214) and a touch switch (2216) are fixedly installed on the inner wall of the mounting bracket (2210). A trigger plate (2215) is fixedly installed on one end of each of the two connecting springs (2214).

5. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 4, characterized in that: A slider (2217) is fixedly installed on the bottom surface of the rack plate (2212), and a groove (2218) is provided on the inner wall of the mounting bracket (2210). The slider (2217) is slidably connected inside the groove (2218).

6. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 4, characterized in that: Two telescopic columns (2219) are fixedly installed on the inner wall of the mounting bracket (2210), and the telescopic end of each telescopic column (2219) is fixedly connected to the outer surface of the trigger plate (2215).

7. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 2, characterized in that: The rotating mechanism (3) includes a rotating column (302), the bottom end of which is rotatably connected to the upper surface of the base (11). A connecting piece (303) and an adjusting gear (304) are fixedly installed on the outer surface of the rotating column (302). The outer surface of the adjusting gear (304) meshes with the outer surface of the first toothed plate (2118). A rotating motor (305) is fixedly installed on the upper surface of the base (11). A rotating column (306) is fixedly installed at the output end of the rotating motor (305). A rotating piece (307) is fixedly installed at the top of the rotating column (306). A first conical wheel (308) is fixedly installed on the outer surface of the rotating column (306). A bearing seat (309) is fixedly installed on the upper surface of the base (11). A rotating rod (310) is rotatably connected inside the bearing seat (309). A second conical wheel (308) is fixedly installed at one end of the rotating rod (310). 11), the outer surface of the second conical wheel (311) meshes with the outer surface of the first conical wheel (308), the other end of the rotating rod (310) is fixedly installed with an air intake fan (312), the upper surface of the base (11) is fixedly installed with an air intake frame (313), one side of the air intake frame (313) is fixedly connected with a conveying pipe (315), the upper surface of the base (11) is fixedly installed with a venturi tube (314), one end of the conveying pipe (315) penetrates into the interior of the venturi tube (314), the inner wall of the base (11) is fixedly installed with a plurality of suction cups (316), the upper surfaces of the plurality of suction cups (316) are fixedly connected with an installation pipe (317), the outer surface of the venturi tube (314) is fixedly connected with a connecting pipe (318), one end of the connecting pipe (318) penetrates into the interior of the installation pipe (317), and the upper surface of the base (11) is fixedly installed with a controller (319).

8. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 2, characterized in that: A limiting bearing (301) is fixedly installed on the bottom surface of the first toothed plate (2118), and the bottom surface of the inner ring of the limiting bearing (301) is fixedly connected to the upper surface of the base (11).

9. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 7, characterized in that: A storage battery (320) is fixedly installed on the upper surface of the base (11), and the storage battery (320) is electrically connected to the rotating motor (305) through wires.

10. A three-dimensional teaching aid model for drafting that can be quickly adjusted according to claim 1, characterized in that: A protective box (321) is fixedly installed on the upper surface of the base (11), and a protective cover (322) is rotatably hinged to the upper surface of the protective box (321).

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