Automatic dust collection blackboard eraser

Abstract

The invention relates to the technical field of teaching tools, and particularly discloses an automatic dust collection blackboard eraser which comprises a blackboard eraser shell, a dust grading filter shell is fixedly connected to the front end of the blackboard eraser shell, a negative pressure dust collection cover is fixedly connected to the top end of the dust grading filter shell, and a translation dredging frame is connected to the inner side of a dredging operation opening in a penetrating mode; according to the device, a translation dredging frame is pushed to penetrate through a dredging operation opening, so that the translation dredging frame is moved to the position under a flow dividing filter plate, and a lifting force unloading push plate moves upwards, so that a dust tamping and dredging head dredges blocked dust in a flow dividing open hole; the electric lifting seat and the translation dredging frame are accurately matched, so that the dust tamping head can be quickly and accurately positioned below each shunting opening, efficient dredging operation is carried out, the problems of inaccurate positioning, incomplete dredging and the like possibly occurring during manual dredging are avoided, the working efficiency is improved, and the labor intensity of workers is reduced. Accurate dredging operation ensures that dust in the flow dividing open holes is thoroughly removed, and therefore the cleaning effect of the blackboard eraser is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of teaching tools, and specifically to an automatic dust-absorbing blackboard eraser. Background Art

[0002] An automatic dust-absorbing blackboard eraser is a teaching tool integrating the functions of erasing and dust absorption, aiming to improve the efficiency of blackboard erasing and reduce the harm of dust to the health of teachers and students. The automatic dust-absorbing blackboard eraser can significantly improve the efficiency of blackboard erasing, reduce the workload of teachers, effectively reduce the dispersion and pollution of dust through the dust absorption function, protect the health of teachers and students, and has the advantages of good erasing effect, high dust absorption efficiency and convenient maintenance. It is applicable to various schools, training institutions and other places that need to use blackboards frequently. With the continuous progress of technology and the reduction of costs, the automatic dust-absorbing blackboard eraser has significant advantages and broad application prospects.

[0003] Patent document CN110920301 B discloses a blackboard eraser with a dust absorption function, "including a blackboard eraser body, the blackboard eraser body is hollow, and a plurality of dust suction holes are equidistantly arranged in a ring on the side peripheral wall of the blackboard eraser body. A ball bearing is installed on the upper end surface inside the blackboard eraser body, a rotating cylinder is vertically installed in the inner ring of the ball bearing, ratchet teeth are arranged in a ring on the outer cylinder wall of the rotating cylinder, a thread is arranged on the inner cylinder wall of the rotating cylinder, and a spring is also installed in the rotating cylinder. The upper end of the spring is fixedly connected to the upper end surface inside the rotating cylinder. In the present invention, the air with chalk dust around the blackboard eraser body will enter the blackboard eraser body through the dust suction holes, so that the chalk dust finally adheres to the dust adsorption mesh plate, avoiding the chalk dust falling from the blackboard being inhaled by the teacher, and thus avoiding the harm of chalk dust to the teacher's body and being beneficial to the normal teaching of the teacher." However, after long-term use, the dust adsorption mesh plate of this blackboard eraser will be filled with dust, and problems such as inaccurate positioning and incomplete dredging may occur during manual dredging, which cannot ensure that the dust is completely removed, reducing the cleaning effect of the blackboard eraser. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic dust-absorbing blackboard eraser to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An automatic dust-absorbing blackboard eraser, comprising:

[0007] A blackboard eraser housing;

[0008] The front end of the blackboard eraser housing is fixedly connected with a dust grading filter housing, the top end of the dust grading filter housing is fixedly connected with a negative pressure dust suction hood, and the front end of the dust grading filter housing is symmetrically fixedly connected with a feeding limit frame;

[0009] The inner wall of the top end of the dust classification filter housing is fixedly connected with a shunt filter plate. The top end of the shunt filter plate is provided with a shunt opening. The front end of the dust classification filter housing is provided with a dredging operation port. The inner side of the dredging operation port is connected with a translation dredging frame. The inner side of the translation dredging frame is movably connected with a lifting unloading push plate. The bottom wall of the translation dredging frame is fixedly connected with an electric lifting seat, and the telescopic end of the electric lifting seat is connected with the bottom end of the lifting unloading push plate. The top end of the lifting unloading push plate is provided with a dust punching head, and the dust punching head movably penetrates through the inner side of the shunt opening.

[0010] Preferably, translation guide seats are slidably connected to the inner sides of the feeding limit frames. The opposite ends of the two translation guide seats are rotatably connected with rotating rollers through bearings, and the outer sides of the rotating rollers are fixedly connected with the front end of the translation dredging frame. The top ends of the feeding limit frames are all provided with limit studs, and the output ends of the limit studs are rotatably connected with the top ends of the translation guide seats.

[0011] Preferably, a vacuum suction fan is fixedly connected to the inner top wall of the negative pressure suction hood. A fine dust storage box is fixedly connected to the top end of the negative pressure suction hood. A rechargeable battery pack is fixedly connected to the front end of the negative pressure suction hood. A drive button is fixedly connected to the front surface of the negative pressure suction hood.

[0012] Preferably, a coarse dust filter screen is fixedly connected to the inner wall of the dust classification filter housing, and the coarse dust filter screen is located below the translation dredging frame. A dust inlet is provided through the bottom of the dust classification filter housing. A dust suction diversion cover is fixedly connected to the bottom end of the dust inlet. An inclined guide plate is fixedly connected to the bottom inner wall of the dust classification filter housing. Coarse dust storage boxes are installed on the outer sides of both ends of the dust classification filter housing. Circulation guide ports are provided through the outer sides of both ends of the dust classification filter housing.

[0013] Preferably, a wiping sponge pad is fixedly connected to the inner bottom wall of the blackboard eraser housing. A holding handle is installed at the top end of the blackboard eraser housing. A long arc groove is provided at the top of the holding handle. A blackboard adsorption magnetic strip is fixedly connected to the inner side of the long arc groove.

[0014] Preferably, elastic rubber bands are symmetrically fixedly connected to the front end of the dust classification filter housing. The other ends of the elastic rubber bands are fixedly connected with sealing rubber soft plates. Semi-circular buckle grooves are provided at both ends of the dredging operation port.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) By adopting a pushing and translating dredging frame to penetrate through the dredging operation port, the translating dredging frame is moved to directly below the shunt filter plate. The electric lifting seat works to push the lifting unloading push plate upward, so that the dust punching head dredges the blocked dust in the shunt opening. The precise cooperation between the electric lifting seat and the translating dredging frame can quickly and accurately position the dust punching head below each shunt opening for efficient dredging operations, avoiding problems such as inaccurate positioning and incomplete dredging that may occur during manual dredging, improving work efficiency. When using the dust punching head for dredging, due to its reasonable design and moderate force, it avoids damaging the shunt filter plate. The precise dredging operation ensures that the dust in the shunt opening is completely removed, thereby improving the cleaning effect of the blackboard eraser.

[0017] (2) By symmetrically and fixedly connecting a feeding limit frame at the front end of the dust classification filter housing, after the dust dredging is completed, the translating dredging frame is moved outside the dust classification filter housing and rotated to the vertical through the rotating roller to achieve the storage of the translating dredging frame. This process is efficient and saves space, enabling the entire blackboard eraser to remain clean and compact when not in use. When dredging is required inside the dust classification filter housing, the translating dredging frame is assembled in place for dredging. After dredging, storage is achieved without adversely affecting the use process of the blackboard eraser. When dredging is required next time, the translating dredging frame can be quickly and accurately assembled in place to ensure the smooth progress of the dredging work, avoiding teaching interruptions caused by equipment interference and further improving the efficiency and effect of dust treatment.

[0018] (3) The large and medium particle dust in the dust is blocked by the coarse dust filter screen. The coarse dust filter screen can effectively separate the large and medium particle dust from the fine dust. The classification filtration ensures that the filtration system will not be blocked due to the accumulation of large particle dust during the dust suction process. The fine dust can smoothly pass through the holes of the coarse dust filter screen and be further adsorbed and processed by the wind force, thereby improving the overall dust suction efficiency. The effective classification of the dust enables the vacuum dust suction fan not to increase the extra workload due to the blockage of large particle dust when handling dust, which helps to extend the service life of the dust suction fan and ensure the continuous and efficient operation of the dust suction system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of the present invention;

[0020] Figure 2 is a schematic diagram of the front internal structure of the dust classification filter housing of the present invention;

[0021] Figure 3 is a perspective view of the holding handle of the present invention;

[0022] Figure 4 is a perspective view of the negative pressure dust suction hood of the present invention;

[0023] Figure 5 Isometric view of the dust classification filter housing of the present invention;

[0024] Figure 6 Isometric view of the feed limit frame of the present invention;

[0025] Figure 7 Isometric view of the translation dredging frame of the present invention;

[0026] In the figure: 1, blackboard eraser housing; 2, negative pressure dust suction hood; 3, dust classification filter housing; 4, holding handle; 5, shunt filter plate; 6, feed limit frame; 7, translation dredging frame; 8, wiping sponge pad; 9, vacuum dust suction fan; 10, fine dust storage tank; 11, rechargeable battery pack; 12, dust inlet; 13, dust suction guide cover; 14, coarse dust filter screen; 15, inclined guide plate; 16, coarse dust storage tank; 17, circulation guide port; 18, long arc groove; 19, blackboard adsorption magnetic strip; 20, shunt opening; 21, dredging operation port; 22, semi-circular buckle groove; 23, elastic rubber band; 24, sealing rubber soft plate; 25, translation guide seat; 26, rotating roller; 27, limit stud; 28, electric lifting seat; 29, lifting unloading push plate; 30, dust punching head; 31, drive button. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1:

[0029] Please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 7 as shown, an automatic dust suction blackboard eraser includes:

[0030] Blackboard eraser housing 1;

[0031] The front end of the blackboard eraser housing 1 is fixedly connected with a dust classification filter housing 3, and the top end of the dust classification filter housing 3 is fixedly connected with a negative pressure dust suction hood 2;

[0032] At the inner wall of the top end of the dust classification filter housing 3, a flow - dividing filter plate 5 is fixedly connected. A flow - dividing opening 20 is penetrated and opened at the top end of the flow - dividing filter plate 5. A dredging operation port 21 is penetrated and opened at the front end of the dust classification filter housing 3. A translation dredging frame 7 is penetrated and connected to the inside of the dredging operation port 21. An elevating unloading push - plate 29 is movably connected to the inside of the translation dredging frame 7. An electric elevating seat 28 is fixedly connected to the bottom wall of the translation dredging frame 7, and the telescopic end of the electric elevating seat 28 is connected to the bottom end of the elevating unloading push - plate 29. A dust punching head 30 is installed at the top end of the elevating unloading push - plate 29, and the dust punching head 30 movably penetrates the inside of the flow - dividing opening 20.

[0033] After the blackboard eraser is used for a long time, dust is easily attached to the inside of the flow - dividing opening 20 of the flow - dividing filter plate 5. The dredging operation port 21 provides a moving space for the translation dredging frame 7. Push the translation dredging frame 7 to penetrate through the dredging operation port 21 so that the translation dredging frame 7 moves to directly below the flow - dividing filter plate 5. The translation dredging frame 7 provides an installation position for the electric elevating seat 28. The electric elevating seat 28 drives the elevating unloading push - plate 29. When the electric elevating seat 28 works, it pushes the elevating unloading push - plate 29 to move upward so that the dust punching head 30 dredges the blocked dust in the flow - dividing opening 20. The size and specification of the dust punching head 30 match the flow - dividing opening 20. During the dredging process, the dust punching head 30 can effectively crush and dredge the blocked dust in the flow - dividing opening 20, avoiding the secondary dispersion and pollution of dust, which is of great significance for keeping the blackboard eraser clean and extending its service life.

[0034] The stability and accuracy of the electric elevating seat 28 and the translation dredging frame 7 contribute to protecting the entire blackboard eraser device and extending its service life. The dredging method is applicable to flow - dividing filter plates 5 of different sizes and shapes, with strong adaptability. Adjusting the parameters of the electric elevating seat 28 and the translation dredging frame 7 can also meet the dredging requirements in different scenarios.

[0035] Embodiment Two:

[0036] Please refer to Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown in, symmetrically fixed connections are made at the front end of the dust classification filter housing 3 with feed limiting frames 6. Translation guide seats 25 are slidably connected to the inside of the feed limiting frames 6. Rotating rollers 26 are rotatably connected to the relative ends of the two groups of translation guide seats 25 through bearings, and the outer side of the rotating roller 26 is fixedly connected to the front end of the translation dredging frame 7. Limit studs 27 are penetrated and installed at the top ends of the feed limiting frames 6, and the output ends of the limit studs 27 are rotatably connected to the top ends of the translation guide seats 25.

[0037] The front end of the dust classification filter housing 3 is symmetrically fixedly connected with an elastic rubber belt 23 , and the other end of the elastic rubber belt 23 is fixedly connected with a sealing rubber soft plate 24 . Both ends of the dredging operation port 21 are provided with semicircular buckle grooves 22 .

[0038] The translation guide seat 25 slides horizontally in the feed limit frame 6. After the dust is dredged, the translation dredging frame 7 is moved to the outside of the dust classification filter housing 3 and the horizontal translation dredging frame 7 is turned vertically by the rotating roller 26 to realize the storage of the translation dredging frame 7. The rotation limit stud 27 is used to limit and press the top of the translation guide seat 25 to prevent the translation dredging frame 7 from shifting or shaking during use or storage. When the dust classification filter housing 3 needs to be dredged, the translation dredging frame 7 is assembled in position to realize dredging. After the dredging is completed, the storage will not have an adverse effect on the use of the blackboard eraser.

[0039] The efficient dust dredging and convenient storage mechanism help to keep the dust classification filter housing 3 clean and operate efficiently. The storage and assembly process of the translational dredging frame 7 is relatively simple and does not require complicated operations or tools, making the daily maintenance of the equipment easier and more convenient. There is no need to worry about problems caused by dust accumulation, nor to worry about the equipment taking up too much space or interfering with normal use. It can be flexibly applied to different types of dust classification filter housings 3 and blackboard eraser systems.

[0040] When the translational dredging rack 7 is stored and not in use, the elastic rubber belt 23 is pulled to engage the sealing rubber soft plate 24 on the inner side of the dredging operation port 21 to prevent the dust grading filter shell 3 from sucking in air and leaking dust through the dredging operation port 21 during the dust treatment process when the translational dredging rack 7 is not in use. The semicircular buckle groove 22 facilitates the operation of the sealing rubber soft plate 24 when releasing the seal of the dredging operation port 21 by the sealing rubber soft plate 24.

[0041] Embodiment three:

[0042] See also Figures 1 to 4 As shown, a wiping sponge pad 8 is fixedly connected to the inner bottom wall of the blackboard eraser housing 1, a gripping handle 4 is installed on the top of the blackboard eraser housing 1, a long arc groove 18 is opened on the top of the gripping handle 4, and a blackboard adsorption magnetic strip 19 is fixedly connected to the inner side of the long arc groove 18;

[0043] The inner top wall of the negative pressure dust hood 2 is fixedly connected with a vacuum dust fan 9, the top of the negative pressure dust hood 2 is fixedly connected with a fine dust storage box 10, the front end of the negative pressure dust hood 2 is fixedly connected with a rechargeable battery pack 11, and the front surface of the negative pressure dust hood 2 is fixedly connected with a driving button 31;

[0044] On the inner wall of the dust classification filter housing 3, a coarse dust filter screen 14 is fixedly connected, and the coarse dust filter screen 14 is located below the translation dredging frame 7. A dust inlet 12 is penetrated and opened at the bottom of the dust classification filter housing 3. The bottom end of the dust inlet 12 is fixedly connected with a dust suction guide cover 13. An inclined guide plate 15 is fixedly connected to the inner wall of the bottom end of the dust classification filter housing 3. Coarse dust storage boxes 16 are installed on the outer sides of both ends of the dust classification filter housing 3. Circulation guide ports 17 are penetrated and opened on the outer sides of both ends of the dust classification filter housing 3.

[0045] By holding the handle 4, it is convenient to operate and move the blackboard eraser housing 1 to realize the wiping work of the wiping sponge pad 8. The long arc groove 18 provides an installation position for the blackboard adsorption magnetic strip 19. The blackboard adsorption magnetic strip 19 ensures the adsorption between the blackboard eraser housing 1 and the blackboard, guaranteeing the stable placement of the whole blackboard eraser on the blackboard.

[0046] The negative pressure dust suction hood 2 provides an installation position for the vacuum dust suction fan 9. The vacuum dust suction fan 9 operates to suck the dust generated by wiping the blackboard wiping sponge pad 8. The sucked dust enters the dust classification filter housing 3 through the dust suction guide cover 13 and the dust inlet 12. The coarse dust filter screen 14 blocks the large and medium particle dust in the dust. The tiny dust passes through the holes of the coarse dust filter screen 14 by wind adsorption and is adsorbed upward. After the dust suction process is completed, the large and medium particle dust in the dust is guided to the coarse dust storage box 16 through the inclined guide plate 15, realizing particle classification filtration of the dust to prevent blockage in subsequent dust suction steps and resulting in poor continuous use effect, reducing the working burden of the vacuum dust suction fan 9. The large and medium particle dust is timely guided to the coarse dust storage box 16, avoiding their accumulation inside the dust suction system, thus maintaining the dust suction capacity and effect of the system, making the dust suction process smoother, and also reducing the possible secondary pollution during the dust suction process.

[0047] The fine dust storage box 10 stores the tiny dust. The rechargeable battery pack 11 is electrically connected to the vacuum dust suction fan 9 and the electric lifting seat 28. The working states of the vacuum dust suction fan 9 and the electric lifting seat 28 are controlled through the drive button 31 to realize the automatic dust suction and cleaning functions of the blackboard eraser.

[0048] Embodiment 4:

[0049] Please refer to Figures 1 to 7 As shown, when the teacher uses the blackboard eraser to clean the blackboard in the teaching scenario, the dust suction system of the blackboard eraser adsorbs the dust generated during the wiping process. The dust is likely to block the filtration system, resulting in a decline in the cleaning effect. Manual dredging is not only inefficient but also easy to damage the equipment. The dust filtration and dredging functions are often separated, with complex operations and large space occupation, affecting the use experience. Therefore, a filtration system cleaning is introduced to achieve efficient and precise dust dredging and improve work efficiency.

[0050] Coarse dust filter meshes, inclined guide plates, coarse dust storage bins and other dust classification and filtration structures are arranged on the inner and outer sides of the dust classification filter housing. The coarse dust filter mesh first blocks large and medium particle dust, and the fine dust passes through the filter mesh and enters the subsequent treatment, realizing the classified distribution treatment of the aspirated and wiped dust. The classified filtration effectively prevents the clogging of the filtration system, extends the service life of the fan, and ensures the efficient operation and cleaning effect of the blackboard eraser.

[0051] A dust clogging dredging structure such as a dredging operation port, a translation dredging frame, a lifting unloading push plate, an electric lifting seat, a dust dredging head, a feeding limit frame, etc. is arranged at the front end of the dust classification filter housing. When the diversion filter plate is used for a long time and the diversion openings are blocked, the translation dredging frame is assembled inside the dust classification filter housing, and the dust dredging head is pushed to accurately position at the blocked position for dredging. After the dredging is completed, the translation dredging frame is vertically stored through the rotating roller. The precise cooperation between the electric lifting seat and the translation dredging frame realizes efficient and accurate dust dredging.

[0052] Working principle: First, the vacuum dust suction fan 9 operates to suck the dust generated by wiping the blackboard wiping sponge pad 8. The sucked dust enters the dust classification filter housing 3 through the dust inlet 12. The coarse dust filter mesh 14 blocks the large and medium particle dust in the dust, and the fine dust is adsorbed upward through the holes of the coarse dust filter mesh 4 by wind adsorption. After the dust suction process is completed, the large and medium particle dust in the dust is guided to the coarse dust storage bin 16 through the inclined guide plate 15, and the fine dust storage bin 10 stores the fine dust.

[0053] After the blackboard eraser is used for a long time, the user pushes the translation dredging frame 7 to penetrate through the dredging operation port 21 so that the translation dredging frame 7 moves to directly below the diversion filter plate 5. Rotate the limit screw 27 to limit and press the top of the translation guide seat 25. Press the drive button 31, and the electric lifting seat 28 works to push the lifting unloading push plate 29 upward so that the dust dredging head 30 dredges the blocked dust in the diversion opening 20.

[0054] After the dust dredging is completed, the translation dredging frame 7 moves outside the dust classification filter housing 3 and the horizontal translation dredging frame 7 is rotated to the vertical through the rotating roller 26 to realize the storage of the translation dredging frame 7, and the limit screw 27 is tightened again.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic vacuum blackboard eraser, characterized in that: include: Blackboard eraser housing (1); The front end of the blackboard eraser housing (1) is fixedly connected to a dust classification filter housing (3), the top end of the dust classification filter housing (3) is fixedly connected to a negative pressure dust suction hood (2), and the front end of the dust classification filter housing (3) is symmetrically fixedly connected to a feed limit frame (6); A diversion filter plate (5) is fixedly connected to the inner wall of the top end of the dust classification filter housing (3), a diversion opening (20) is penetrated through the top end of the diversion filter plate (5), a dredging operation port (21) is penetrated through the front end of the dust classification filter housing (3), a translational dredging frame (7) is penetrated through the inner side of the dredging operation port (21), a lifting and unloading force push plate (29) is movably connected to the inner side of the translational dredging frame (7), an electric lifting seat (28) is fixedly connected to the bottom wall of the translational dredging frame (7), and the telescopic end of the electric lifting seat (28) is connected to the bottom end of the lifting and unloading force push plate (29), a dust tamping head (30) is installed on the top end of the lifting and unloading force push plate (29), and the dust tamping head (30) movably penetrates through the inner side of the diversion opening (20).

2. The automatic dust-absorbing blackboard eraser according to claim 1, characterized in that: The inner side of the feed limit frame (6) is slidably connected to a translation guide seat (25), and the opposite ends of the two groups of translation guide seats (25) are rotatably connected to rotating rollers (26) through bearings, and the outer sides of the rotating rollers (26) are fixedly connected to the front end of the translation dredging frame (7), and the top of the feed limit frame (6) is penetrated by a limiting stud (27), and the output end of the limiting stud (27) is rotatably connected to the top of the translation guide seat (25).

3. The automatic dust-absorbing blackboard eraser according to claim 1, characterized in that: The inner top wall of the negative pressure dust hood (2) is fixedly connected to a vacuum dust fan (9), the top end of the negative pressure dust hood (2) is fixedly connected to a fine dust storage box (10), the front end of the negative pressure dust hood (2) is fixedly connected to a rechargeable battery pack (11), and the front surface of the negative pressure dust hood (2) is fixedly connected to a driving button (31).

4. The automatic dust-absorbing blackboard eraser according to claim 1, characterized in that: A coarse dust filter screen (14) is fixedly connected to the inner wall of the dust classification filter housing (3), and the coarse dust filter screen (14) is located below the translational dredging frame (7). A dust inlet (12) is provided through the bottom of the dust classification filter housing (3), and a dust suction guide cover (13) is fixedly connected to the bottom end of the dust inlet (12). An inclined guide plate (15) is fixedly connected to the inner wall of the bottom end of the dust classification filter housing (3). Coarse dust storage boxes (16) are installed on the outer sides of both ends of the dust classification filter housing (3), and flow guide ports (17) are provided through the outer sides of both ends of the dust classification filter housing (3).

5. The automatic dust-absorbing blackboard eraser according to claim 1, characterized in that: The inner bottom wall of the blackboard eraser housing (1) is fixedly connected with a wiping sponge pad (8); the top of the blackboard eraser housing (1) is provided with a gripping handle (4); the top of the gripping handle (4) is provided with a long arc groove (18); the inner side of the long arc groove (18) is fixedly connected with a blackboard adsorption magnetic strip (19).

6. The automatic dust-absorbing blackboard eraser according to claim 1, characterized in that: The front end of the dust classification filter housing (3) is symmetrically fixedly connected with an elastic rubber belt (23), the other end of the elastic rubber belt (23) is fixedly connected with a sealing rubber soft plate (24), and both ends of the dredging operation port (21) are provided with semicircular buckle grooves (22).

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