CN211543053U

CN211543053U - Blackboard for scientific and technological teaching

Info

Publication number: CN211543053U
Application number: CN201922353051.3U
Authority: CN
Inventors: 邹高宇; 邹维; 冯宇睿; 戴鹏
Original assignee: Sichuan Zhongsen Tongyue Technology Co ltd
Current assignee: Sichuan Zhongsen Tongyue Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-22
Anticipated expiration: 2029-12-23

Abstract

The utility model relates to a blackboard for scientific and technological teaching, it includes the clipboard and lies in the mounting bracket outside the clipboard, the sliding is provided with the blackboard eraser on the mounting bracket, the blackboard eraser includes the wiping face used for wiping the clipboard face, the wiping face is laminated with the clipboard face, be provided with the first drive arrangement used for driving the reciprocal motion of blackboard eraser on the mounting bracket; the method is characterized in that: a cleaning area is arranged on one side of the writing board, the first driving device drives the blackboard eraser to reciprocate on the cleaning area and the writing board, an adsorption piece is arranged in the cleaning area in a sliding mode, and the adsorption piece is connected with a dust collector; the blackboard eraser is characterized in that a second driving device used for driving the adsorption piece to move in the cleaning area is arranged in the cleaning area, the blackboard eraser is in a long strip shape, the length direction of the blackboard eraser is parallel to the sliding direction of the adsorption piece when the blackboard eraser is positioned in the cleaning area, and the adsorption piece is attached to the wiping surface when the blackboard eraser is positioned in the cleaning area. This technical scheme has convenient to use's advantage.

Description

Blackboard for scientific and technological teaching

Technical Field

The utility model belongs to the technical field of the technique of blackboard is used in the teaching and specifically relates to a blackboard for scientific and technological teaching is related to.

Background

The blackboard is the teaching aid who uses commonly used, and the teacher uses the chalk to write the teaching content on the blackboard, helps improving student's learning efficiency, and the teacher often needs to clean the blackboard manually at the in-process that uses the blackboard, not only takes trouble and labouriously, very easily produces the dust moreover, and it is very inconvenient in the in-service use, therefore it has the blackboard of automatic function of cleaning to need to design.

The patent with application publication number CN106346984A discloses an automatic wiping blackboard, which comprises a writing board surface, a motor and a wiping module containing a strip-shaped wiping board, wherein the motor drives the writing board surface to move up and down, and the writing board surface rubs with the strip-shaped wiping board while moving up and down to achieve the purpose of automatically wiping the blackboard. However, in the technical scheme, a large amount of chalk dust can be accumulated after the long strip-shaped wiping plate for wiping the blackboard is used, the wiping effect is affected, and the long strip-shaped wiping plate can be normally used after the large amount of dust accumulated on the long strip-shaped wiping plate is cleaned. The long-strip-shaped wiping plate is required to be detached from the wiping module firstly when the accumulated dust on the long-strip-shaped wiping plate is cleaned, the long-strip-shaped wiping plate is required to be installed on the wiping module after the cleaning is finished, the long-strip-shaped wiping plate is required to be detached and installed ceaselessly in the actual use process, and inconvenience is brought to the use of automatically wiping the blackboard.

Disclosure of Invention

The utility model aims to provide a blackboard for scientific and technical teaching that convenient to use exists to prior art not enough.

The above technical purpose of the present invention can be achieved by the following technical solutions: a blackboard for scientific and technological teaching comprises a writing board and a mounting frame positioned on the outer side of the writing board, wherein the writing board comprises a writing board surface for writing, an eraser is arranged on the mounting frame in a sliding manner, the eraser comprises an erasing surface for erasing the writing board surface, the erasing surface is attached to the writing board surface, and a first driving device for driving the eraser to reciprocate is arranged on the supporting frame; a cleaning area is arranged on one side of the writing board, the first driving device drives the blackboard eraser to reciprocate on the cleaning area and the writing board, an adsorption piece is arranged in the cleaning area in a sliding mode and connected with an air suction pipe, and the other end of the air suction pipe is connected with a dust collector; the cleaning area is internally provided with a second driving device for driving the adsorption piece to move in the cleaning area, the eraser is in a strip shape, the length direction of the eraser is parallel to the sliding direction of the adsorption piece when the eraser is positioned in the cleaning area, and the adsorption piece is attached to the wiping surface when the eraser is positioned in the cleaning area; the air suction pipe is a pressure-resistant flexible pipe, and the length of the air suction pipe is not less than the distance from the side, far away from the dust collector, of the cleaning area to the air suction end of the dust collector.

By adopting the technical scheme, the strip-shaped eraser is movably arranged on the mounting frame at the outer side of the writing board, the wiping surface is attached to the writing board surface, and the first driving device drives the eraser to reciprocate on the writing board, so that the aim of automatically wiping the writing board surface is fulfilled; the cleaning device is characterized in that a cleaning area is arranged, an adsorption piece is arranged in the cleaning area and connected with a dust collector, a second driving device for driving the adsorption piece to move in the cleaning area is arranged in the cleaning area, and when the first driving device drives the strip-shaped blackboard eraser to the cleaning area, the second driving device drives the adsorption piece to move along the strip-shaped blackboard eraser, the dust collector adsorbs chalk dust on the erasing surface into the dust collector, so that the chalk dust on the erasing surface can be reduced, the invention purpose of automatically cleaning the chalk dust on the erasing surface is realized, the blackboard eraser is not required to be disassembled, and the use process is convenient and rapid.

Preferably, the writing board surface comprises a bottom edge of the bottom part, a top edge far away from the bottom edge, a first side edge connecting the bottom edge and the top edge, and a second side edge opposite to the first side edge; the blackboard eraser is arranged along the direction from the first side edge to the second side edge, and the first driving device drives the blackboard eraser to reciprocate along the direction from the top edge to the direction far away from the top edge; the board eraser moves along the direction from the top edge to the direction away from the top edge to form a wiping area, the writing board surface is in the wiping area, and the cleaning area is positioned in the wiping area and below the writing board.

By adopting the technical scheme, the first driving device drives the board eraser to move back and forth from the top edge to the direction far away from the top edge, the board eraser moves along the direction from the top edge to the direction far away from the top edge to form a wiping area, the whole writing board surface is arranged in the wiping area, all areas of the writing board surface can be wiped when the board eraser moves back and forth, and the wiping efficiency of the board eraser is improved; the cleaning area is located below the writing board, and the eraser is located below the writing board when the eraser is cleaned, so that normal use of the writing board is not affected, and the use efficiency of the writing board is improved.

Preferably, a first slide rail is fixedly mounted on the mounting frame, the eraser is slidably mounted on the first slide rail, the first driving device comprises a first driving motor for driving the eraser to slide on the first slide rail and a first rotating gear connected with an output shaft of the first driving motor, and the first slide rail is provided with teeth meshed with the first rotating gear.

By adopting the technical scheme, the first sliding rail is arranged on the mounting frame, the eraser is slidably mounted on the first sliding rail, the first driving motor for driving the eraser to slide on the first sliding rail is arranged, the first driving motor is connected with the first rotating gear, the first sliding rail is provided with teeth meshed with the first rotating gear, the first driving motor is started to drive the first rotating gear to rotate, and the first sliding rail containing the teeth meshed with the first rotating gear is fixedly mounted on the mounting frame, so that the first driving motor is forced to slide along the first sliding rail, the eraser is driven to slide along the first sliding rail and the writing page, and the purpose of automatically wiping the writing page is achieved.

Preferably, fixed mounting has the second slide rail on the mounting bracket, adsorb a slidable mounting on the second slide rail, second drive arrangement adsorbs the second driving motor that gliding second driving motor and second driving motor output shaft are connected on the second slide rail including the drive, be provided with the tooth with second rotating gear meshing on the second slide rail.

By adopting the technical scheme, the mounting frame is provided with the second slide rail, the adsorption piece is slidably mounted on the second slide rail, the second drive motor for driving the adsorption piece to slide on the second slide rail is arranged, the second drive motor is connected with the second rotating gear, and the second slide rail is provided with teeth meshed with the second rotating gear; when the blackboard eraser moves to the cleaning area, the adsorption piece is attached to the wiping surface, the second driving motor and the dust collector are started, the second driving motor drives the second rotating gear to rotate, the second sliding rail containing teeth meshed with the second rotating gear is fixedly mounted on the mounting frame, the second driving motor is forced to slide along the second sliding rail, the adsorption piece is driven to slide along the second sliding rail and the wiping surface, the chalk dust on the wiping surface is adsorbed into the dust collector by the dust collector while the adsorption piece slides, the chalk dust on the wiping surface can be reduced, the invention purpose of automatically cleaning the chalk dust on the wiping surface is achieved, the blackboard eraser does not need to be disassembled, and the use process is convenient and rapid.

Preferably, the adsorption piece comprises a suction nozzle, a plurality of bristles are arranged around the suction nozzle, and when the blackboard eraser is located in the cleaning area, the other ends of the bristles are abutted to the wiping surface.

Through adopting above-mentioned technical scheme, the absorption piece includes the suction nozzle, and the surrounding is provided with a plurality of brush hairs on the suction nozzle, and when the absorption piece slided on the blackboard eraser, the brush hair on the suction nozzle can scrape the chalk dust on the brush face of wiping, can make the connection of chalk dust and brush face become not hard up, is favorable to the dust catcher to follow the brush face with the chalk dust and sucks to the dust catcher in, improves the absorption efficiency of absorption piece to the chalk dust on the brush face.

Preferably, when the blackboard eraser is positioned in the cleaning area, the distance from the side far from the bottom edge to the side close to the bottom edge of the suction nozzle is not less than the distance from the side far from the bottom edge to the side close to the bottom edge of the blackboard eraser, and the central line from the side far from the bottom edge to the side close to the bottom edge of the suction nozzle is coincided with the central line from the side far from the bottom edge to the side close to the bottom edge of the blackboard eraser.

By adopting the technical scheme, the distance from the side far from the bottom edge to the side close to the bottom edge of the suction nozzle is not less than the distance from the side far from the bottom edge to the side close to the bottom edge of the blackboard eraser, the center line from the side far from the bottom edge to the side close to the bottom edge of the suction nozzle coincides with the center line from the side far from the bottom edge to the side close to the bottom edge of the blackboard eraser, when the adsorption piece slides on the wiping surface, the suction nozzle can cover all areas of the wiping surface from the side far from the bottom edge to the side close to the bottom edge, the coverage area of the suction nozzle is increased, and the adsorption efficiency of the adsorption piece on.

Preferably, the suction nozzle is flat, and the long edge of the suction nozzle is arranged from the direction far away from the bottom edge to the direction close to the bottom edge.

Through adopting above-mentioned technical scheme, the suction nozzle is the platykurtic, and the long border of suction nozzle is installed from keeping away from the base to the direction that is close to the base, and the suction nozzle is shorter from being close to first lateral side to the distance that is close to second lateral side, can reduce the suction area of suction nozzle, can improve the suction intensity of suction nozzle, improves the adsorption efficiency of absorption piece to chalk dust on the wiping face.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the long strip-shaped eraser is movably arranged on the mounting frame on the outer side of the writing board, the wiping surface is attached to the writing board surface, and the first driving device drives the eraser to reciprocate on the writing board, so that the aim of automatically wiping the writing board surface is fulfilled; the cleaning device is characterized in that a cleaning area is arranged, an adsorption piece is arranged in the cleaning area and connected with a dust collector, a second driving device for driving the adsorption piece to move in the cleaning area is arranged in the cleaning area, and when the first driving device drives the strip-shaped blackboard eraser to move to the cleaning area, the second driving device drives the adsorption piece to move along the strip-shaped blackboard eraser, the dust collector adsorbs chalk dust on the wiping surface to the dust collector, so that the chalk dust on the wiping surface can be reduced, the invention purpose of automatically cleaning the chalk dust on the wiping surface is realized, the blackboard eraser is not required to be disassembled, and the use process is convenient and rapid;

2. the first driving device drives the board eraser to move back and forth from the top edge to the direction far away from the top edge, the board eraser moves along the direction from the top edge to the direction far away from the top edge to form a wiping area, the whole writing board surface is arranged in the wiping area, all areas of the writing board surface can be wiped when the board eraser moves back and forth, and the wiping efficiency of the board eraser is improved; the cleaning area is positioned below the writing board, and the eraser is positioned below the writing board when the eraser is cleaned, so that the normal use of the writing board is not influenced, and the use efficiency of the writing board is improved; the plurality of brush hairs are arranged on the suction nozzle in a surrounding manner, when the adsorption piece slides on the blackboard eraser, the brush hairs on the suction nozzle can scrape and brush the chalk dust on the wiping surface, so that the connection between the chalk dust and the wiping surface becomes loose, a dust collector can suck the chalk dust from the wiping surface into the dust collector, and the adsorption efficiency of the adsorption piece on the chalk dust on the wiping surface is improved; the suction nozzle is flat, the long edge of the suction nozzle is arranged from the direction far away from the bottom edge to the direction close to the bottom edge, and the distance from the side close to the first side to the side close to the second side of the suction nozzle is shorter, so that the suction area of the suction nozzle can be reduced, the suction strength of the suction nozzle can be improved, and the suction efficiency of the suction piece on chalk dust on a wiping surface can be improved;

3. the blackboard eraser is arranged on the first sliding rail in a sliding mode, a first driving motor for driving the blackboard eraser to slide on the first sliding rail is arranged on the mounting frame, the first driving motor is connected with a first rotating gear, teeth meshed with the first rotating gear are arranged on the first sliding rail, the first driving motor is started to drive the first rotating gear to rotate, and the first sliding rail containing the teeth meshed with the first rotating gear is fixedly arranged on the mounting frame, so that the first driving motor is forced to slide along the first sliding rail, the blackboard eraser is driven to slide along the first sliding rail and a writing page, and the purpose of automatically wiping the blackboard is achieved; the mounting frame is provided with a second slide rail, the adsorption piece is slidably mounted on the second slide rail, a second driving motor for driving the adsorption piece to slide on the second slide rail is arranged, the second driving motor is connected with a second rotating gear, and the second slide rail is provided with teeth meshed with the second rotating gear; when the blackboard eraser moves to the cleaning area, the adsorption piece is attached to the wiping surface, the second driving motor and the dust collector are started, the second driving motor drives the second rotating gear to rotate, the second sliding rail containing teeth meshed with the second rotating gear is fixedly mounted on the mounting frame, the second driving motor is forced to slide along the second sliding rail, the adsorption piece is driven to slide along the second sliding rail and the wiping surface, the chalk dust on the wiping surface is adsorbed into the dust collector by the dust collector while the adsorption piece slides, the chalk dust on the wiping surface can be reduced, the invention purpose of automatically cleaning the chalk dust on the blackboard eraser is achieved, the blackboard eraser does not need to be disassembled, and the use process is convenient and rapid.

Drawings

FIG. 1 is a front view block diagram of an embodiment;

FIG. 2 is a rear view block diagram of an implementation example;

fig. 3 is a schematic structural view of the adsorbing member.

Reference numerals: 1. a writing board; 2. a mounting frame; 3. erasing the blackboard; 4. wiping the surface; 5. brushing; 6. an adsorbing member; 7. an air intake duct; 8. a vacuum cleaner; 9. a bottom edge; 10. A top edge; 11. a first side edge; 12. a second side edge; 13. a first slide rail; 14. a first drive motor; 15. a first rotating gear; 16. a second slide rail; 17. a second drive motor; 18. a second rotating gear; 19. a suction nozzle; 20. a slide bar; 21. a writing board surface; 22. a first chute; 23. a first clip strip; 24. a second chute; 25. a second card strip.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A blackboard for scientific and technical teaching is shown in figures 1 and 2 and comprises a writing board 1 and a mounting rack 2 positioned on the outer side of the writing board 1, wherein the writing board 1 comprises a writing board surface 21 for writing; the tablet surface 21 includes a bottom edge 9 of the base, a top edge 10 remote from the bottom edge 9, a first side edge 11 connecting the bottom edge 9 and the top edge 10, and a second side edge 12 opposite the first side edge 11. The blackboard eraser 3 is arranged on the mounting frame 2 in a sliding mode, the blackboard eraser 3 is long, the blackboard eraser 3 is arranged along the direction from the first side edge 11 to the second side edge 12, and the blackboard eraser 3 comprises a wiping surface 4 used for wiping the surface 21 of the writing board.

As shown in fig. 1, a first slide rail 13 is fixedly mounted on the mounting bracket 2 on the left side of the first side 11, the first slide rail 13 is mounted in parallel with the first side 11, and the eraser 3 is slidably mounted on the first slide rail 13. The mounting frame 2 is provided with a first driving device for driving the blackboard eraser 3 to reciprocate, the first driving device comprises a first driving motor 14 for driving the blackboard eraser 3 to slide on a first sliding rail 13 and a first rotating gear 15 connected with an output shaft of the first driving motor 14, and the first sliding rail 13 is provided with teeth meshed with the first rotating gear 15. The first rotating gear 15 is rotatably connected with the eraser 3. Be provided with first spout 22 on mounting bracket 2 on the left side of first slide rail 13, first driving motor 14 is connected with first card strip 23, and the other end joint of first card strip 23 is in first spout 22, and first spout 22 keeps away from first driving motor 14 end restriction with first card strip 23 in first spout 22, and first card strip 23 is kept away from first driving motor 14 end and can be slided in first spout 22. A slide bar 20 is arranged on the mounting frame 2 at the right side of the second side edge 12, and the end of the blackboard eraser 3 far away from the first driving motor 14 is connected with the slide bar 20 in a sliding manner. The sliding rod 20, the first sliding slot 22 and the first clamping strip 23 are all used for limiting the sliding direction of the first driving motor 14 and the eraser 3. The first driving device drives the blackboard eraser 3 to reciprocate from the top edge 10 to the direction far away from the top edge 10; the eraser 3 moves along the direction from the top edge 10 to the direction far away from the top edge 10 to form a wiping area, the writing board surface 21 is arranged in the wiping area, a cleaning area is arranged below the writing board 1, the first driving device drives the eraser 3 to reciprocate on the cleaning area and the writing board 1, and when the eraser 3 slides on the writing board 1, the wiping surface 4 is attached to the writing board surface 21.

As shown in fig. 1 and 2, an adsorption member 6 is slidably disposed in the cleaning region, the adsorption member 6 is connected with an air suction pipe 7, the air suction pipe 7 is a pressure-resistant flexible pipe, the pressure-resistant flexible pipe can resist pressure and can move, the pressure-resistant flexible pipe is not easily damaged in the moving process, the length of the air suction pipe 7 is not less than the distance from the side of the cleaning region far away from the dust collector 8 to the air suction end of the dust collector 8, and the other end of the air suction pipe 7 is connected with the dust collector 8. The vacuum cleaner 8 can be selected from commercially available products (for example, a product model DL-1020T manufactured by Kerdwey), and the vacuum cleaner 8 comprises a dust collecting device and has the function of conveniently cleaning dust in the dust collecting device. A second slide rail 16 is fixedly arranged below the bottom edge 9 on the mounting frame 2, and the adsorption piece 6 is slidably arranged on the second slide rail 16. And a second driving device for driving the adsorbing member 6 to move in the cleaning area is arranged in the cleaning area, the second driving device comprises a second driving motor 17 for driving the adsorbing member 6 to slide on a second slide rail 16 and a second rotating gear 18 connected with an output shaft of the second driving motor 17, and the second slide rail 16 is provided with teeth meshed with the second rotating gear 18. Second rotating gear 18 rotates with adsorbing piece 6 and is connected, be provided with second spout 24 in the below of second slide rail 16 on the mounting bracket 2, second driving motor 17 is connected with second card strip 25, the other end joint of second card strip 25 is in second spout 24, second spout 24 keeps away from second driving motor 17 end restriction with second card strip 25 in second spout 24, second card strip 25 is kept away from second driving motor 17 end and can is slided in second spout 24, second spout 24 and second card strip 25 are used for restricting second driving motor 17 and the slip direction that adsorbs piece 6. The length direction of the eraser 3 is parallel to the sliding direction of the absorbing piece 6, and when the eraser 3 is positioned in the cleaning area, the absorbing piece 6 is attached to the wiping surface 4.

As shown in figures 2 and 3, the suction member 6 comprises a suction nozzle 19, the suction nozzle 19 is provided with a plurality of bristles 5 in a surrounding manner, when the blackboard eraser 3 is positioned in the cleaning area, the other ends of the bristles 5 abut against the wiping surface 4, and the distance from the side far away from the bottom edge 9 to the side close to the bottom edge 9 of the suction nozzle 19 is not less than the distance from the side far away from the bottom edge 9 to the side close to the bottom edge 9 of the blackboard eraser 3. When the eraser 3 is located in the cleaning area and the second driving device drives the suction member 6 to slide, the central line from the side far from the bottom edge 9 to the side close to the bottom edge 9 of the suction nozzle 19 is always coincident with the central line from the side far from the bottom edge 9 to the side close to the bottom edge 9 of the eraser 3. The suction nozzle 19 is flat and the long side of the suction nozzle 19 is arranged in a direction from a position far from the bottom edge 9 to a position close to the bottom edge 9.

The specific working process is as follows: when the teacher gives a class, in order to facilitate the students to absorb the knowledge taught by the teacher, the teacher can use the chalk to write on the writing board surface 21, when the writing board surface 21 needs to be wiped under the conditions that the class is finished or the writing board surface 21 is completely occupied by the chalk writing and the like, the first driving motor 14 is started, under the combined action of the teeth on the first slide rail 13 and the first rotating gear 15, the first driving motor 14 reciprocates along the first slide rail 13 to drive the board eraser 3 to reciprocate on the writing board surface 21, and the wiping surface 4 wipes the chalk writing on the writing board surface 21 in the reciprocating process, so that the aim of automatically wiping the writing board surface 21 is fulfilled.

When the blackboard eraser 3 is used for a certain number of times, more chalk dust is accumulated on the wiping surface 4, the wiping effect of the wiping surface 4 is affected, and the chalk dust accumulated on the wiping surface 4 needs to be cleaned. When the blackboard eraser 3 is positioned in a cleaning area, the dust collector 8 and the second driving motor 17 are started, under the combined action of the teeth on the second slide rail 16 and the second rotating gear 18, the second driving motor 17 reciprocates along the blackboard eraser 3 to drive the adsorption piece 6 to reciprocate along the wiping surface 4, the brush hair 5 scrapes chalk dust accumulated on the wiping surface 4, so that the connection between the chalk dust and the wiping surface 4 becomes loose, the dust collector 8 performs air suction, and the chalk dust accumulated on the wiping surface 4 is sucked into the dust collector through the suction nozzle 19 and the air suction pipe 7, so that the chalk dust on the wiping surface 4 can be reduced, the invention purpose of automatically cleaning the chalk dust on the wiping surface 4 is realized, the blackboard eraser 3 does not need to be detached, and the use process is convenient and rapid.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The blackboard for scientific and technical teaching comprises a writing board (1) and a mounting frame (2) positioned on the outer side of the writing board (1), wherein the writing board (1) comprises a writing board surface (21) for writing, an eraser (3) is arranged on the mounting frame (2) in a sliding manner, the eraser (3) comprises an erasing surface (4) for erasing the writing board surface (21), the erasing surface (4) is attached to the writing board surface (21), and a first driving device for driving the eraser (3) to do reciprocating motion is arranged on the mounting frame (2); the method is characterized in that: a cleaning area is arranged on one side of the writing board (1), the first driving device drives the blackboard eraser (3) to reciprocate on the cleaning area and the writing board (1), an adsorption piece (6) is arranged in the cleaning area in a sliding mode, the adsorption piece (6) is connected with an air suction pipe (7), and the other end of the air suction pipe (7) is connected with a dust collector (8); the cleaning area is internally provided with a second driving device for driving the adsorption piece (6) to move in the cleaning area, the blackboard eraser (3) is in a long strip shape, the length direction of the blackboard eraser (3) is parallel to the sliding direction of the adsorption piece (6) when the blackboard eraser (3) is positioned in the cleaning area, and the adsorption piece (6) is attached to the wiping surface (4) when the blackboard eraser (3) is positioned in the cleaning area; the air suction pipe (7) is a pressure-resistant flexible pipe, and the length of the air suction pipe (7) is not less than the distance from the side, far away from the dust collector (8), of the cleaning area to the air suction end of the dust collector (8).

2. The blackboard for scientific and technical teaching according to claim 1, characterized in that: the writing board surface (21) comprises a bottom edge (9) at the bottom, a top edge (10) far away from the bottom edge (9), a first side edge (11) connecting the bottom edge (9) and the top edge (10), and a second side edge (12) opposite to the first side edge (11); the blackboard eraser (3) is arranged along the direction from the first side edge (11) to the second side edge (12), and the first driving device drives the blackboard eraser (3) to move back and forth from the top edge (10) to the direction far away from the top edge (10); the blackboard eraser (3) moves along the direction from the top edge (10) to the direction far away from the top edge (10) to form a wiping area, the writing board surface (21) is in the wiping area, and the cleaning area is positioned in the wiping area and below the writing board (1).

3. The blackboard for scientific and technical teaching according to claim 2, characterized in that: the blackboard eraser is characterized in that a first sliding rail (13) is fixedly mounted on the mounting rack (2), the blackboard eraser (3) is slidably mounted on the first sliding rail (13), the first driving device comprises a first driving motor (14) for driving the blackboard eraser (3) to slide on the first sliding rail (13) and a first rotating gear (15) connected with an output shaft of the first driving motor (14), and teeth meshed with the first rotating gear (15) are arranged on the first sliding rail (13).

4. The blackboard for scientific and technical teaching according to claim 1, characterized in that: fixed mounting has second slide rail (16) on mounting bracket (2), adsorb piece (6) slidable mounting on second slide rail (16), second drive arrangement adsorbs gliding second driving motor (17) and second driving gear (18) with second driving motor (17) output shaft on second slide rail (16) including the drive, be provided with the tooth with second driving gear (18) meshing on second slide rail (16).

5. The blackboard for scientific and technical teaching according to claim 2, characterized in that: the adsorption piece (6) comprises a suction nozzle (19), the suction nozzle (19) is provided with a plurality of bristles (5) in a surrounding mode, and when the blackboard eraser (3) is located in a cleaning area, the other ends of the bristles (5) are abutted to the wiping surface (4).

6. The blackboard for scientific and technical teaching according to claim 5, characterized in that: when the blackboard eraser (3) is positioned in a cleaning area, the distance from the side far from the bottom edge (9) to the side close to the bottom edge (9) of the suction nozzle (19) is not less than the distance from the side far from the bottom edge (9) to the side close to the bottom edge (9) of the blackboard eraser (3), and the central line from the side far from the bottom edge (9) to the side close to the bottom edge (9) of the suction nozzle (19) is coincided with the central line from the side far from the bottom edge (9) to the side close to the bottom edge (9) of the blackboard eraser (3).

7. The blackboard for scientific and technical teaching according to claim 6, characterized in that: the suction nozzle (19) is flat, and the long edge of the suction nozzle (19) is arranged from a direction far away from the bottom edge (9) to a direction close to the bottom edge (9).