An educational training device with distance learning function

Abstract

The application relates to the technical field of education and training equipment, and discloses an education and training device with a remote education function, which comprises a mounting frame, a wall is arranged behind the mounting frame, the mounting frame is fixedly installed on the wall, and moving holes are formed in the left and right side walls of the mounting frame. Through the cooperative design of "double blackboard alternating use + automatic linkage wiping", the pain point that the traditional blackboard needs to be manually interrupted for wiping after being written full is effectively solved; when the front blackboard is written full of traces, a teaching staff only needs to manually push the blackboard, and the blackboard can be stably moved by means of a "gear-rack meshing + slide column-back-shaped groove guiding" structure; and the "dry wiping-wet wiping-dry wiping" integrated cleaning is synchronously completed in the moving process; under the condition of proficiency, the whole operation does not need to interrupt the teaching explanation, the teaching rhythm caused by wiping the blackboard in the remote education recording is avoided, and the continuity of teaching content output and the physical health of the teaching staff are ensured.

Description

Technical Field

[0001] This invention relates to the field of educational training equipment technology, and in particular to an educational training device with distance education function. Background Technology

[0002] With the rapid development of the online education industry, distance education has become an important part of the education and training field due to its advantages of "breaking the limitations of time and space and realizing the sharing of high-quality educational resources". In the teaching scenario of distance education, the blackboard, as a traditional and core teaching aid, needs to work in conjunction with the display screen. The display screen is used to display digital teaching content such as courseware and videos, while the blackboard is used for interactive teaching operations such as real-time blackboard writing and highlighting. The combination of the two can fully take into account the intuitiveness and flexibility of teaching. However, existing blackboard devices suitable for distance education still have many problems that need to be solved in actual use, which seriously affect teaching efficiency, recording quality and safety of use.

[0003] First, traditional blackboards have a core pain point in remote education scenarios: poor teaching continuity. Currently, most blackboards used in remote education require teachers to pause teaching and manually erase them after the blackboard is covered with writing. This process interrupts the teaching rhythm, not only disrupting the students' learning continuity but also causing "invalid waiting segments" in the recorded teaching videos, increasing post-editing costs. Furthermore, the dust generated by long-term manual erasing can harm the respiratory health of teachers.

[0004] Secondly, the "insufficient stability and safety" of blackboard movement and positioning restricts the recording effect and user experience of distance education. To achieve a comprehensive display of the blackboard content, blackboards used in distance education are mostly designed with a sliding structure. However, existing devices lack an effective speed control mechanism: when the external force of the teacher pushing the blackboard is too great, the blackboard is prone to violently colliding with the side wall of the mounting frame due to excessive sliding speed. On the one hand, this will cause wear and tear on the blackboard, mounting frame and other parts, shortening the service life of the device; on the other hand, the huge noise generated by the collision will be recorded into the teaching video, interfering with the audio quality and affecting the students' listening experience; more seriously, the gap between the rapidly sliding blackboard and the mounting frame can easily create a "hand-pinching risk", which may cause finger injuries to the teacher, posing a significant safety hazard.

[0005] Finally, the "dust pollution problem" in the blackboard cleaning process has not been effectively solved. Existing blackboard erasing mostly relies on dry erasers, which generate a lot of chalk dust during wiping. Some of this dust will drift into the teaching environment, not only adhering to the surface of the display screen and recording equipment, affecting the normal operation of the equipment and the cleanliness of the recorded image, but also being inhaled by teaching staff and on-site support personnel. Over time, this can easily lead to respiratory diseases. Furthermore, dust can easily accumulate inside the device, thereby affecting the operational flexibility of components such as blackboard sliding and gear meshing, leading to an increased device failure rate. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention provides an educational training device with distance education function to solve the problems mentioned in the background art.

[0007] This invention provides the following technical solution: an educational training device with distance education function, comprising a mounting frame, a wall behind the mounting frame, the mounting frame being fixedly mounted on the wall, movable holes on both the left and right side walls of the mounting frame, multiple dust collection holes on the lower side wall of the mounting frame, two slide rails on both the upper and lower side walls of the mounting frame, a rack fixedly connected to the front side wall of each slide rail, a blackboard between every two opposing slide rails, and fixed posts fixedly connected to the upper and lower surfaces of each blackboard, the outer surface of each fixed post being rotatable. The mounting frame is connected to a first gear, the outer edge of which meshes with a rack. The upper and lower sidewalls of the mounting frame are provided with U-shaped grooves. Each fixed post has a sliding post fixedly connected to its end furthest from the blackboard. The sliding post is located within the U-shaped groove and can slide within it. Each sliding post has a first top block fixedly connected to its end furthest from the fixed post. The two upper first top blocks are trapezoidal in shape. A display screen is fixedly installed on the wall. An automatic wiping device is provided on the mounting frame. A speed reduction device is provided inside the first gear. An automatic dust blowing device is provided on the blackboard.

[0008] Preferably, the automatic wiping device includes a water tank, which is fixedly installed on a wall. A water outlet pipe is fixedly connected to the bottom of the water tank and communicates with the inner cavity of the water tank. A piston is slidably connected to the inner surface of the water outlet pipe. A connecting column is fixedly connected to the lower end of the piston. A second top block is fixedly connected to the lower end of the connecting column. The lower end of the second top block is arc-shaped. A water supply pipe is fixedly connected to the side wall of the water outlet pipe. A water flow pipe is slidably connected to the outer surface of the lower end of the water supply pipe. A wet wiping strip is fixedly connected to the rear side wall of the water flow pipe. Three fixing rods are fixedly connected to the upper and lower surfaces of the mounting frame. The inner wall of the middle fixing rod is slidably connected to the water flow pipe. Dry wiping strips are slidably connected to the inner walls of the fixing rods on the left and right sides. The same fixing plate is slidably connected to the side walls of the three fixing rods.

[0009] Preferably, the bottom of the water outlet pipe has a circular hole that matches the connecting column, the lower end of the connecting column is located outside the water outlet pipe, the diameter of the connecting column is smaller than the diameter of the piston, the length of the piston is greater than the diameter of the water supply pipe, the rear side wall of the water pipe is porous, the wet wipes are made of elastic absorbent material, and the hardness of the wet wipes is less than that of the blackboard.

[0010] Preferably, when the piston is at its lowest point, the lower surface of the piston is in contact with the bottom of the water outlet pipe, and the inner cavity of the water supply pipe is connected to the inner cavity of the water outlet pipe. When the first top block is located at the lower right corner of the groove, the piston is at its highest point, and the inner cavity of the water supply pipe is not connected to the inner cavity of the water outlet pipe.

[0011] Preferably, the deceleration device includes a first gear, and the teeth of the first gear are provided with sliding cavities. A spring is fixedly connected to the side wall of each sliding cavity near the fixed post. A friction block is fixedly connected to the end of each spring away from the fixed post. The end of the friction block away from the spring is frosted. When the spring is in its naturally extended state, the friction block is completely located inside the sliding cavity and can slide inside the sliding cavity.

[0012] Preferably, the automatic dust blowing device includes four second gears, with two second gears rotatably connected to the bottom of each blackboard. The outer edge of each second gear meshes with a rack, and a fan is fixedly connected to the lower end of each second gear. A dust collection box is fixedly installed below the mounting frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention effectively solves the problem of needing to manually interrupt teaching to wipe the blackboard after it is full by using a collaborative design of "alternating use of dual blackboards + automatic linkage wiping". When the blackboard in front is full of writing, the teacher only needs to manually push the blackboard. With the help of the "gear-rack meshing + sliding column-U-groove guide" structure, the blackboard can be moved smoothly. During the movement, the integrated cleaning of "dry wiping-wet wiping-dry wiping" is completed simultaneously. When the teacher is skilled, the whole operation can be carried out without interrupting the teaching explanation, avoiding the interruption of the teaching rhythm caused by wiping the blackboard during remote education recording, ensuring the continuity of teaching content output and the health of the teacher.

[0014] 2. When the external force pushing the blackboard is too great, causing the sliding speed to be too fast, the friction block will automatically extend out of the sliding cavity and rub against the inner wall of the slide rail, slowing down the gear speed and preventing the blackboard from violently colliding with the side wall of the mounting frame due to rapid movement. On the one hand, this reduces the wear of the device parts and extends their service life, and prevents the huge noise generated by the collision from interfering with the audio recording quality of distance education. On the other hand, the deceleration device controls the blackboard's moving speed, which can prevent the teacher's fingers from being pinched by the gap between the blackboard and the mounting frame when pushing the blackboard.

[0015] 3. In this invention, when the blackboard moves, the second gear at the bottom meshes with the rack and pinion to drive the fan to rotate synchronously. The airflow generated by the fan can blow the chalk dust and residual dust that have been wiped off in a directional direction toward the dust collection hole on the lower side of the mounting frame. Finally, the dust is collected into the dust collection box through the dust collection hole, which effectively avoids dust accumulation from affecting the operation of the entire device, and also prevents dust from scattering, reducing the impact of dust on the respiratory tract of teaching staff and students on site, thus balancing cleaning effect and environmental friendliness. Attached Figure Description

[0016] 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 below the blackboard in this invention; Figure 3 This is a frontal cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 For the present invention Figure 3 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the right-side cross-sectional structure of the present invention; Figure 7 For the present invention Figure 3 Enlarged structural diagram at point C.

[0017] In the diagram: 1. Mounting frame; 2. Wall; 3. Moving hole; 4. Dust collection hole; 5. Slide rail; 6. Rack; 7. Blackboard; 8. Fixing post; 9. First gear; 10. U-shaped groove; 11. Sliding column; 12. First top block; 13. Water tank; 14. Water outlet pipe; 15. Piston; 16. Connecting column; 17. Second top block; 18. Water supply pipe; 19. Water flow pipe; 20. Wet wiping strip; 21. Fixing rod; 22. Dry wiping strip; 23. Fixing insert plate; 24. Sliding cavity; 25. Spring; 26. Friction block; 27. Second gear; 28. Fan; 29. ​​Dust collection box; 30. Display screen. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-7An educational training device with distance education function includes a mounting frame 1, a wall 2 behind the mounting frame 1, the mounting frame 1 being fixedly mounted on the wall 2, movable holes 3 on both the left and right side walls of the mounting frame 1, multiple dust collection holes 4 on the lower side wall of the mounting frame 1, two slide rails 5 on both the upper and lower side walls of the mounting frame 1, a rack 6 fixedly connected to the front side wall of each slide rail 5, a blackboard 7 between each pair of upper and lower opposing slide rails 5, a fixing post 8 fixedly connected to the upper and lower surfaces of each blackboard 7, and a first gear 9 rotatably connected to the outer surface of each fixing post 8. The outer edge of the first gear 9 meshes with the rack 6. The upper and lower side walls of the mounting frame 1 are provided with loop grooves 10. Each fixed post 8 is fixedly connected to a sliding post 11 at the end away from the blackboard 7. The sliding post 11 is located in the loop groove 10 and can slide in the loop groove 10. Each sliding post 11 is fixedly connected to a first top block 12 at the end away from the fixed post 8. The two first top blocks 12 located at the top are trapezoidal in shape. A display screen 30 is fixedly installed on the wall 2. An automatic wiping device is provided on the mounting frame 1. A speed reduction device is provided in the first gear 9. An automatic dust blowing device is provided on the blackboard 7.

[0020] Furthermore, the automatic wiping device includes a water tank 13, which is fixedly installed on the wall 2. A water outlet pipe 14 is fixedly connected to the bottom of the water tank 13, and the water outlet pipe 14 communicates with the inner cavity of the water tank 13. A piston 15 is slidably connected to the inner surface of the water outlet pipe 14. A connecting column 16 is fixedly connected to the lower end of the piston 15. A second top block 17 is fixedly connected to the lower end of the connecting column 16. The lower end of the second top block 17 is arc-shaped. A water supply pipe 18 is fixedly connected to the side wall of the water outlet pipe 14. A water flow pipe 19 is slidably connected to the outer surface of the lower end of the water supply pipe 18. A wet wiping strip 20 is fixedly connected to the rear side wall of the water flow pipe 19. Three fixing rods 21 are fixedly connected to the upper and lower surfaces of the mounting frame 1. The inner wall of the middle fixed rod 21 is slidably connected to the water pipe 19. The inner walls of the fixed rods 21 on the left and right sides are slidably connected to the dry wiping strips 22. The side walls of the three fixed rods 21 are slidably connected to the same fixed insert plate 23. When the blackboard 7 moves to the left, it drives the first top block 12 to move to the left in sync. The second top block 17 loses the support of the first top block 12. Under its own weight and water pressure, the second top block 17 drives the piston 15 to move downward. At this time, the water supply pipe 18 on the side wall of the water outlet pipe 14 is connected to the inner cavity of the water outlet pipe 14. The water in the water tank 13 flows into the water supply pipe 18 along the water outlet pipe 14 and then enters the water pipe 19 which is slidably connected to the water supply pipe 18.

[0021] Furthermore, the bottom of the water outlet pipe 14 is provided with a round hole that matches the connecting column 16. The lower end of the connecting column 16 is located outside the water outlet pipe 14. The diameter of the connecting column 16 is smaller than the diameter of the piston 15, and the length of the piston 15 is greater than the diameter of the water supply pipe 18. The rear side wall of the water pipe 19 is porous. The wet erasing strip 20 is made of elastic water-absorbing material, and the hardness of the wet erasing strip 20 is less than the hardness of the blackboard 7. The water in the water pipe 19 eventually permeates into the wet erasing strip 20, keeping it moist. When the blackboard 7, which is covered with writing, moves to the left, the moist wet erasing strip 20 adheres tightly to the surface of the blackboard 7, completely dissolving and wiping away the writing.

[0022] Furthermore, when piston 15 is at its lowest point, the lower surface of piston 15 is in contact with the bottom of water outlet pipe 14, and the inner cavity of water supply pipe 18 is connected to the inner cavity of water outlet pipe 14. When the first top block 12 is located at the lower right corner of the U-shaped groove 10, piston 15 is at its highest point, and the inner cavity of water supply pipe 18 is not connected to the inner cavity of water outlet pipe 14. Blackboard 7, along with the first top block 12, pushes the second top block 17 upwards, and piston 15 rises to its highest point. Piston 15 will completely block the interface between water supply pipe 18 and water outlet pipe 14, cutting off the water path and preventing the wet wiper strip 20 from absorbing too much water.

[0023] Furthermore, the deceleration device includes a first gear 9, and each tooth portion of the first gear 9 has a sliding cavity 24 inside. Each sliding cavity 24 is fixedly connected to a spring 25 near the side wall of the fixed post 8. Each spring 25 is fixedly connected to a friction block 26 at the end away from the fixed post 8. The end of the friction block 26 away from the spring 25 is frosted. When the spring 25 is naturally extended, the friction block 26 is completely inside the sliding cavity 24 and can slide inside the sliding cavity 24. When the external force pushing the blackboard 7 is too large, the rotation speed of the first gear 9 increases accordingly. The friction block 26 in the sliding cavity 24 inside its teeth will slide outward due to centrifugal force, overcome the tension of the spring 25 and extend out of the sliding cavity 24, generating friction with the inner wall of the slide rail 5, thereby slowing down the rotation speed of the first gear 9 and thus reducing the moving speed of the blackboard 7.

[0024] Furthermore, the automatic dust blowing device includes four second gears 27. Two second gears 27 are rotatably connected to the bottom of each blackboard 7. The outer edge of the second gear 27 meshes with the rack 6. A fan 28 is fixedly connected to the lower end of each second gear 27. A dust collection box 29 is fixedly installed below the mounting frame 1. During the movement of the blackboard 7, the two second gears 27 rotatably connected to the bottom will mesh with the rack 6 and roll, causing the fan 28 at the lower end of the second gear 27 to rotate synchronously. The airflow generated by the fan 28 will blow the chalk dust and residual dust wiped off the surface of the blackboard 7 toward the dust collection hole 4 on the lower side wall of the mounting frame 1. The dust falls into the dust collection box 29 below the mounting frame 1 through the dust collection hole 4.

[0025] Working principle: When the device is in its initial state, both blackboards 7 are located on the right side within the mounting frame 1. The display screen 30 is fixed to the wall 2 on the left rear side of the mounting frame 1, allowing for simultaneous display of remote teaching content. When the blackboard 7 in front is filled with writing, the teacher can manually push the blackboard 7 to the left. At this time, the first gear 9 at the outer end of the fixing post 8 on the upper and lower surfaces of the blackboard 7 will mesh and roll with the rack 6 on the front side of the slide rail 5 on the upper and lower side walls of the mounting frame 1, converting the sliding of the blackboard 7 into gear rotation. Simultaneously, the sliding post 11 at the end of the fixing post 8 slides along the loop groove 10 of the mounting frame 1. Through the dual action of "gear-rack meshing + sliding post-loop groove guidance," the blackboard 7 is ensured to move stably in the horizontal direction. During this process, if the pushing force is too large, the blackboard 7 will... If the blackboard 7 slides too fast, the deceleration device inside the first gear 9 will automatically activate: when the external force pushing the blackboard 7 is too large, the rotation speed of the first gear 9 will increase accordingly. The friction block 26 in the sliding cavity 24 inside its teeth will slide outward due to centrifugal force, overcoming the tension of the spring 25 and extending out of the sliding cavity 24, generating friction with the inner wall of the slide rail 5, thereby slowing down the rotation speed of the first gear 9. On the one hand, this avoids the blackboard 7 moving too fast, resulting in too short a contact time with the automatic wiping device, thus making the wiping incomplete. On the other hand, it avoids the blackboard 7 colliding rapidly and violently with the side wall of the mounting frame 1, which would generate huge noise and affect the recording effect, and also avoids pinching the fingers of personnel during violent collisions. When the blackboard 7 located in front moves to the left, it drives the first top block 1. 2. Moving synchronously to the left, the second top block 17 loses the support of the first top block 12. Under its own weight and water pressure, the second top block 17 drives the piston 15 to move downward. At this time, the water supply pipe 18 on the side wall of the water outlet pipe 14 is connected to the inner cavity of the water outlet pipe 14. The water in the water tank 13 flows into the water supply pipe 18 along the water outlet pipe 14, and then into the water flow pipe 19 which is slidably connected to the water supply pipe 18. Finally, it permeates to the wet erasing strip 20 on the back of the water flow pipe 19, keeping it moist. When the blackboard 7 covered with writing moves to the left, the dry erasing strip 22 on the far right first wipes the blackboard 7. Then, the wet erasing strip 20 adheres tightly to the surface of the blackboard 7, completely dissolving and wiping away the writing. Subsequently, the dry erasing strip 22 on the left absorbs... The residual moisture from the wet wiping strip 20 prevents watermarks from forming on the surface of the blackboard 7, achieving integrated cleaning of "dry wiping-wet wiping-dry wiping". When the wiped blackboard 7 moves to its left limit, the blackboard 7 located at the rear is pushed forward through the moving hole 3 on the right. This blackboard 7, along with the first top block 12, pushes the second top block 17 forward again. The piston 15 rises to its highest point, and the piston 15 completely blocks the interface between the water supply pipe 18 and the water outlet pipe 14, cutting off the water path and preventing the wet wiping strip 20 from absorbing too much water. The cleaned blackboard 7 is then pushed backward, allowing it to move along the loop groove 10 to the rear. Then it is pushed to the right, at which point the wiping strip no longer contacts it. The cleaned blackboard 7 and the blackboard 7 previously located at the rear have swapped positions, waiting for the next cycle.Simultaneously, as the blackboard 7 moves, the two second gears 27 connected at the bottom rotate and mesh with the rack 6, causing the fan 28 at the lower end of the second gears 27 to rotate synchronously. The airflow generated by the fan 28 blows the chalk dust and residual dust wiped off the surface of the blackboard 7 towards the dust collection hole 4 on the lower side wall of the mounting frame 1. The dust falls through the dust collection hole 4 into the dust collection box 29 below the mounting frame 1, completing the automatic dust removal and collection.

[0026] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An educational training device with distance education function, comprising a mounting frame (1), characterized in that, The mounting frame (1) has a wall (2) behind it. The mounting frame (1) is fixedly mounted on the wall (2). The left and right side walls of the mounting frame (1) are provided with moving holes (3). The lower side wall of the mounting frame (1) is provided with multiple dust collection holes (4). The upper and lower side walls of the mounting frame (1) are provided with two slide rails (5). The front side wall of each slide rail (5) is fixedly connected with a rack (6). A blackboard (7) is provided between each pair of upper and lower opposing slide rails (5). The upper and lower surfaces of each blackboard (7) are fixedly connected with a fixing post (8). The outer surface of each fixing post (8) is rotatably connected with a first gear (9). The outer edge of the first gear (9) is connected to the rack ( 6) Engagement, the upper and lower side walls of the mounting frame (1) are provided with a spiral groove (10), and each fixed post (8) is fixedly connected to a sliding post (11) at the end away from the blackboard (7). The sliding post (11) is located in the spiral groove (10) and can slide in the spiral groove (10). Each sliding post (11) is fixedly connected to a first top block (12) at the end away from the fixed post (8). The two first top blocks (12) located at the top are trapezoidal. A display screen (30) is fixedly installed on the wall (2). An automatic wiping device is provided on the mounting frame (1). A speed reduction device is provided in the first gear (9). An automatic dust blowing device is provided on the blackboard (7).

2. The educational training device with distance education function according to claim 1, characterized in that, The automatic wiping device includes a water tank (13), which is fixedly installed on the wall (2). A water outlet pipe (14) is fixedly connected to the bottom of the water tank (13). The water outlet pipe (14) communicates with the inner cavity of the water tank (13). A piston (15) is slidably connected to the inner surface of the water outlet pipe (14). A connecting column (16) is fixedly connected to the lower end of the piston (15). A second top block (17) is fixedly connected to the lower end of the connecting column (16). The lower end of the second top block (17) is arc-shaped. The side wall of the water outlet pipe (14) is fixedly connected to... A water supply pipe (18) is connected, and a water pipe (19) is slidably connected to the lower outer surface of the water supply pipe (18). A wet wiping strip (20) is fixedly connected to the rear side wall of the water pipe (19). Three fixing rods (21) are fixedly connected to the upper and lower surfaces of the mounting frame (1). The inner wall of the middle fixing rod (21) is slidably connected to the water pipe (19). The inner walls of the fixing rods (21) on the left and right sides are slidably connected to dry wiping strips (22). The side walls of the three fixing rods (21) are slidably connected to the same fixing plate (23).

3. The educational training device with distance education function according to claim 2, characterized in that, The bottom of the water outlet pipe (14) is provided with a round hole that matches the connecting column (16). The lower end of the connecting column (16) is located outside the water outlet pipe (14). The diameter of the connecting column (16) is smaller than the diameter of the piston (15). The length of the piston (15) is greater than the diameter of the water supply pipe (18). The rear side wall of the water pipe (19) is porous. The wet wipes (20) are made of elastic absorbent material, and the hardness of the wet wipes (20) is less than the hardness of the blackboard (7).

4. The educational training device with distance education function according to claim 3, characterized in that, When the piston (15) is at its lowest point, the lower surface of the piston (15) is in contact with the bottom of the water outlet pipe (14), and the inner cavity of the water supply pipe (18) is connected to the inner cavity of the water outlet pipe (14). When the first top block (12) is located at the lower right corner of the groove (10), the piston (15) is at its highest point, and the inner cavity of the water supply pipe (18) is not connected to the inner cavity of the water outlet pipe (14).

5. An educational training device with distance education function according to claim 4, characterized in that, The deceleration device includes a first gear (9), and each tooth portion of the first gear (9) has a sliding cavity (24) inside. Each sliding cavity (24) is fixedly connected to a spring (25) on the side wall near the fixed post (8). Each spring (25) is fixedly connected to a friction block (26) at the end away from the fixed post (8). The end of the friction block (26) away from the spring (25) is frosted. When the spring (25) is in its naturally extended state, the friction block (26) is completely located inside the sliding cavity (24), and the friction block (26) can slide inside the sliding cavity (24).

6. The educational training device with distance education function according to claim 5, characterized in that, The automatic dust blowing device includes four second gears (27). Two second gears (27) are rotatably connected to the bottom of each blackboard (7). The outer edge of the second gear (27) meshes with the rack (6). A fan (28) is fixedly connected to the lower end of each second gear (27). A dust collection box (29) is fixedly installed below the mounting frame (1).

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