CN214564213U

CN214564213U - Blackboard eraser set

Info

Publication number: CN214564213U
Application number: CN202021564909.7U
Authority: CN
Inventors: 赵君卓; 王羿霖
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-11-02
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a blackboard eraser set, which comprises a blackboard eraser main body and a blackboard eraser base; the blackboard eraser main body is hollow, and the front surface and the back surface of the blackboard eraser main body are respectively provided with a first plate eraser cloth and a second plate eraser cloth; the inner rectangular cavity of the blackboard eraser main body is divided into four spaces by a transverse partition part parallel to the blackboard eraser cloth, and the four spaces are respectively used for storing dust, absorbing dust, storing water and spraying to realize dry erasing and wet erasing of the blackboard eraser main body; the blackboard eraser base comprises a blackboard eraser placing cavity arranged on one side, a double-layer placing cavity arranged in the middle, a water tank arranged above the other side and a first drawing box arranged below the other side; the blackboard eraser base is used for timely removing chalk dust temporarily collected in the dust collection cavity and timely supplementing water for the water storage cavity, so that convenience is provided for blackboard cleaning. The utility model is simple in operation convenient, dust removal effect and clean blackboard effect are outstanding, have stronger practical value.

Description

Blackboard eraser set

Technical Field

The utility model relates to a teaching aid technical field, more specifically the theory relates to a blackboard eraser suit.

Background

In the teaching process, a blackboard, chalk and a blackboard eraser are very common teaching tools. The chalk mainly comprises calcium sulfate, and the chalk dust flies around in the process of erasing the blackboard, wherein dust with smaller particles (the diameter is 10-20 mu m) can be inhaled through the nose and attached to small mucous membrane air passages and alveoli, so that the health of a person who erases the blackboard can be seriously harmed, the health of people around the person can be harmed, and the risk of suffering respiratory diseases exists. Therefore, how to collect the dust in time without spreading the dust when the blackboard is erased is a problem that the technicians in the field have to overcome for a long time.

Meanwhile, after the blackboard is used for a long time, the handwriting on the blackboard is difficult to clean, and the blackboard needs to be cleaned by taking a wet cleaning cloth for cleaning every day, so that the residual chalk powder is removed, which is very troublesome; the wet blackboard eraser is designed for solving the problem, the blackboard can be erased, however, after the blackboard eraser is wetted, the blackboard eraser cannot be dried in a short time, so that the blackboard eraser cannot be erased normally, and if the wet blackboard eraser is used for erasing the blackboard all the time, writing is not convenient before water stains are not dried, so that normal teaching use is influenced.

Therefore, how to provide a blackboard eraser kit to effectively overcome the above-mentioned problems in the prior art is a key research topic of those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, based on the defect among the above-mentioned prior art, the utility model aims to provide a blackboard eraser suit, this blackboard eraser suit can enough solve the problem of blackboard in-process dust flying upward pollution and the problem of deashing difficulty, can be with the light erasing of writing that will be difficult to clean with same blackboard eraser again, still do not influence the normal use of blackboard and blackboard eraser when making the blackboard keep clean.

The specific technical scheme of the blackboard eraser set is as follows:

a blackboard eraser set comprises a blackboard eraser main body and a blackboard eraser base;

the blackboard eraser main body is hollow, a first plate eraser cloth and a second plate eraser cloth are respectively arranged on the front surface and the back surface of the blackboard eraser main body, the first plate eraser cloth is a plurality of erasing strips which are arranged on the front surface of the blackboard eraser main body at intervals, and the second plate eraser cloth is an erasing cloth which is integrally arranged on the back surface of the blackboard eraser main body; the rectangular cavity in the blackboard eraser main body is divided into four spaces by a transverse separating part parallel to the two pieces of blackboard eraser cloth; the first space is adjacent to the first board eraser, one surface of the first space, which is close to the first board eraser, is provided with a dust absorption hole, and then the first space, the third space and the fourth space are sequentially arranged in sequence, the fourth space is adjacent to the second board eraser, and one surface, which is close to the second board eraser, of the fourth space is integrally opened; the first space is a dust collecting cavity; the transverse separation part between the first space and the second space is a filter screen, a suction fan is arranged in the second space, the suction fan is powered by a power supply arranged on the outer side surface of the blackboard eraser main body, and an exhaust hole is formed in one surface, far away from the power supply, of the second space; the transverse partition part between the second space and the third space is a first partition plate, the third space is internally divided into a water storage cavity and a water pump accommodating cavity, the water pump accommodating cavity is positioned at one side close to the power supply, the water pump is arranged in the water pump accommodating cavity, a water inlet of the water pump accommodating cavity is communicated with a water outlet of the water storage cavity, and a water inlet of the water storage cavity with a sealing cover is arranged at one side of the water storage cavity, which is far away from the power supply; the transverse separation part between the third space and the fourth space is a second separation plate, one surface of the second separation plate facing the fourth space is uniformly provided with a plurality of spray heads connected with water outlets of a water pump, and the water spray surface of each spray head faces the second plate wiper; a dust outlet with a sealing cover is arranged on one surface of the dust collection cavity away from the power supply; the outer side surface of the blackboard eraser main body is also provided with control buttons for respectively controlling the suction fan and the water pump;

the blackboard eraser base comprises a blackboard eraser placing cavity arranged on one side, a double-layer placing cavity arranged in the middle, a water tank arranged above the other side and a first drawing box arranged below the other side; a water injection pump is arranged above the double-layer placing cavity, and a dust collection induced draft fan is arranged below the double-layer placing cavity; the water outlet of the water tank is connected with the water injection pump, and the water outlet of the water injection pump extends into the blackboard eraser placing cavity; the first drawing box is communicated with the dust absorption draught fan, and an air induction port of the dust absorption draught fan also extends into the blackboard eraser accommodating cavity; when the blackboard eraser main body is placed in the blackboard eraser placing cavity, a dust outlet of the dust collecting cavity is communicated with an induced draft port of the dust collection induced draft fan, and a water inlet of the water storage cavity is communicated with a water outlet of the water injection pump; the dust absorption draught fan with the water injection pump provides operating voltage through external power source.

By adopting the technical scheme, the beneficial effects of the utility model are that:

the front surface and the back surface of the blackboard eraser main body in the blackboard eraser set can be used for erasing a blackboard, a dry blackboard eraser is obtained when the blackboard is erased by using first blackboard eraser cloth on the front surface, and a wet blackboard eraser is obtained when the blackboard is erased by using second blackboard eraser cloth on the back surface. When the blackboard eraser is used as a dry blackboard eraser, the suction fan positioned in the second space works to form a low-pressure area in the second space and the first space used as a dust collection cavity, and under the pressure difference between the inside and the outside of the blackboard eraser main body, air with chalk dust around the blackboard eraser main body enters the dust collection cavity through the dust collection holes to be temporarily collected, so that people are prevented from sucking the air; when the wet blackboard eraser is used as a wet blackboard eraser, the water pump positioned in the third space works to drive the spray head to spray water to the second blackboard eraser cloth, and the second blackboard eraser cloth which is wetted can easily erase the characters which are difficult to remove on the blackboard.

The utility model discloses blackboard eraser main part can realize dry wiping and can realize wet wiping again, and easy operation is convenient, and dust removal effect and clean blackboard effect are outstanding, and is convenient practical again.

In addition because the restriction in dust absorption chamber and water storage chamber self space, the utility model discloses blackboard eraser base has still additionally been add, can in time clear away the chalk dust of the interior interim collection of dust absorption chamber to in time for the water storage chamber makes up water, provide convenience for clean blackboard work.

On the basis of the technical scheme, the utility model discloses still can make following improvement:

preferably, the blackboard eraser base is further provided with a blackboard eraser dust removal structure, the blackboard eraser dust removal structure is arranged at one end, far away from the double-layer placing cavity, of the blackboard eraser placing cavity, and the blackboard eraser dust removal structure comprises a grid plate located at the upper portion and a second drawing box located at the lower portion of the grid plate.

Has the advantages that: people can scrape the board wiping cloth on the grid plate, so that chalk powder remained on the board wiping cloth is collected into the second drawing box, and the chalk powder on the board wiping cloth of the blackboard eraser main body is thoroughly cleaned.

Preferably, baffles are arranged around the grid plate.

Has the advantages that: the baffle can limit the scraping path of the blackboard eraser main body and can effectively prevent chalk powder from flying around in the scraping process.

Preferably, the blackboard eraser base is further provided with a power input plug matched with a charging port of the power supply, and the power input plug is connected with a wall socket or a power wiring board, so that the power supply on the blackboard eraser body can be charged in time, the blackboard eraser body can be kept in a full-power state, and a long-time working state can be kept.

Preferably, the front surface of the blackboard eraser main body is provided with a fence type first support frame for installing the first board eraser, the dust collection holes in the first space are provided with multiple rows, the multiple rows of the dust collection holes correspond to the neutral positions on the first support frame, and the plurality of the eraser strips are detachably arranged on the fence board of the first support frame.

Has the advantages that: the dust collection holes and the wiping strips are arranged at intervals, so that the suction fan can conveniently draw air and collect dust; the detachable installation design of the wiping strip is convenient for people to clean or replace the wiping strip.

Preferably, the back surface of the blackboard eraser main body is provided with a rectangular second support frame for mounting the second board eraser, the middle of the second support frame is hollowed, the water spraying surface of the spray head penetrates through the hollowed part and faces the second board eraser, and the edges of the periphery of the second board eraser are detachably mounted on four edges of the second support frame.

Has the advantages that: the plurality of spray heads can penetrate through the hollows in the second support frame to quickly and uniformly wet the second board wiping cloth; the second board wiper is also designed to be detached and installed, so that people can clean or replace the second board wiper conveniently.

Preferably, the suction fan is a turbo fan having a good dust suction effect.

Preferably, the blackboard eraser main body is further provided with a blackboard eraser cover which can be detachably and firmly covered on the front surface or the back surface of the blackboard eraser main body, so that hands are prevented from directly contacting wiping cloth to be stained when the blackboard eraser is used for erasing a blackboard.

Preferably, a handle is arranged outside the blackboard eraser cover, and people can drive the blackboard eraser main body to erase a blackboard by holding the handle, so that the operation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an axonometric view of a blackboard eraser main body in a blackboard eraser set of the utility model.

Fig. 2 is an axonometric view two of the blackboard eraser main body in the blackboard eraser set of the utility model.

Fig. 3 is a cross-sectional view of the blackboard eraser main body in the blackboard eraser set of the present invention.

Fig. 4 is an axonometric view of the blackboard eraser base in the blackboard eraser set of the present invention.

Fig. 5 is a cross-sectional view of the blackboard eraser base in the blackboard eraser set of the present invention.

Wherein, in the figure,

1-first board wiper, 2-second board wiper, 3-first space, 4-dust suction hole, 5-second space, 6-third space, 7-fourth space, 8-filter screen, 9-suction fan, 10-power supply, 11-exhaust hole, 12-first partition board, 13-water storage cavity, 14-water pump accommodating cavity, 15-water pump, 16-water storage cavity water inlet, 17-second partition board, 18-spray head, 19-dust outlet, 20-control button, 21-charging port, 22-first support frame, 23-second support frame, 24-blackboard eraser accommodating cavity, 25-double-layer accommodating cavity, 26-water tank, 27-first drawing box, 28-water injection pump, 29-dust suction draught fan, 30-grid plate, 31-second drawing box, 32-baffle, 33-power input plug, 34-eraser cover and 35-handle.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A blackboard eraser kit according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 5.

Example (b):

the embodiment of the utility model provides a blackboard eraser suit, including blackboard eraser main part and blackboard eraser base.

In particular, the method comprises the following steps of,

as shown in fig. 1-3, the blackboard eraser body is hollow, and the front and back surfaces of the blackboard eraser body are respectively provided with a first plate eraser 1 and a second plate eraser 2, the first plate eraser 1 is three erasing strips which are arranged on the front surface of the blackboard eraser body at intervals, and the second plate eraser 2 is an erasing cloth which is integrally arranged on the back surface of the blackboard eraser body.

The rectangular cavity in the blackboard eraser main body is divided into four spaces by a transverse separating part parallel to the two pieces of blackboard eraser cloth; wherein, adjacent with first board wiper 1 is first space 3, is equipped with dust absorption hole 4 on the one side that first space 3 is close to first board wiper 1, then is second space 5, third space 6 and fourth space 7 in proper order, and fourth space 7 is adjacent with second board wiper 2 and fourth space 7 is close to the whole opening of one side of second board wiper 2.

More specifically, the first space 3 is a dust collecting chamber; the transverse separation part between the first space 3 and the second space 5 is a filter screen 8, the filter screen 8 can completely separate chalk powder in the dust collection cavity, a suction fan 9 is arranged in the second space 5, the suction fan 9 is preferably a turbine fan, the suction fan 9 is powered by a power supply 10 arranged on the outer side surface of the blackboard eraser main body, and an exhaust hole 11 is arranged on one surface, far away from the power supply 10, of the second space 5.

When the suction fan 9 works, wind enters from the dust suction holes 4, passes through the filter screen 8 and is discharged from the exhaust holes 11, so that a low-pressure area is formed in the second space 5 and the first space 3 serving as a dust collection cavity, and under the pressure difference between the inside and the outside of the blackboard eraser body, the air with chalk dust around the blackboard eraser body enters the dust collection cavity through the dust suction holes 4 and is temporarily collected, so that people are prevented from sucking chalk dust when the blackboard eraser is erased.

Horizontal separation portion between second space 5 and the third space 6 is for the first division board 12 that seals up completely, is divided into water storage chamber 13 and water pump in the third space 6 and holds chamber 14, and the water pump holds chamber 14 and is located the one side that is close to power 10, and water pump 15 is arranged in the water pump and is held chamber 14 and its water inlet and the delivery port in water storage chamber 13 and is linked together, and the one side that power 10 was kept away from in water storage chamber 13 is provided with water storage chamber water inlet 16 of taking sealed lid.

The transverse separation part between the third space 6 and the fourth space 7 is a second separation plate 17, one surface of the second separation plate 17 facing the fourth space 7 is evenly provided with a plurality of spray heads 18 connected with water outlets of the water pump, and the water spraying surface of each spray head 18 faces the second plate wiping cloth 2.

The side of the dust collecting cavity far away from the power supply 10 is provided with a dust outlet 19 with a sealing cover.

The outer side surface of the blackboard eraser main body is also provided with control buttons 20 for respectively controlling the suction fan 9 and the water pump 15, and different control buttons 20 can be selected and operated according to different wiping requirements.

As shown in fig. 4 and 5, the blackboard eraser base comprises a blackboard eraser placing cavity 24 arranged on one side, a double-layer placing cavity 25 arranged in the middle, a water tank 26 arranged above the other side, and a first drawing box 27 arranged below the other side; a water injection pump 28 is arranged above the double-layer placing cavity 25, and a dust absorption induced draft fan 29 is arranged below the double-layer placing cavity; the water outlet of the water tank 26 is connected with a water injection pump 28, and the water outlet of the water injection pump 28 extends into the blackboard eraser placing cavity 24; the first drawing box 27 is communicated with a dust absorption induced draft fan 29, and an air induction port of the dust absorption induced draft fan 29 also extends into the blackboard eraser placing cavity 24.

When the blackboard eraser main body is placed in the blackboard eraser placing cavity 24, the dust outlet 19 of the dust collection cavity is communicated with the induced draft port of the dust collection induced draft fan 29, and the water inlet 16 of the water storage cavity is communicated with the water outlet of the water injection pump 28; the dust absorption induced draft fan 29 and the water injection pump 28 provide working voltage through the external power supply 10.

In one embodiment of the blackboard eraser set of the present invention, a blackboard eraser dust removing structure is further disposed on the blackboard eraser base, the blackboard eraser dust removing structure is disposed at one end of the blackboard eraser placing cavity 24 far away from the double-layer placing cavity 25, and the blackboard eraser dust removing structure includes a grid plate 30 located at the upper portion and a second drawing box 31 located at the lower portion of the grid plate 30. Further, baffles 32 are disposed around the grid plate 30.

In one embodiment of the blackboard eraser kit of the present invention, a power input plug 33 adapted to the charging port 21 of the power source 10 is further disposed on the blackboard eraser base, and the power input plug 33 is connected to a wall socket or a power wiring board.

The power source 10 in this embodiment is preferably a lithium battery, which can maintain a long-term operation state and reduce the number of charging times.

The utility model discloses in one of the embodiment of blackboard eraser suit, the blackboard eraser main part openly is provided with the fence formula first support frame 22 that is used for installing first board wiper 1, and dust absorption hole 4 on first space 3 is provided with the multirow, and multirow dust absorption hole 4 corresponds with the neutral on the first support frame 22, and three strip detachable of cleaning are installed on the fence of first support frame 22, paste the bonding on the fence for example through the magic.

In one embodiment of the blackboard eraser kit of the present invention, the back surface of the blackboard eraser body is provided with a rectangular second supporting frame 23 for mounting the second board eraser 2, the middle hollow of the second supporting frame 23 and the water spraying surface of the atomizing head 18 pass through the hollow towards the second board eraser 2, and the detachable edges around the second board eraser 2 are mounted on four edges of the second supporting frame 23, for example, the edges are adhered to the four edges of the second supporting frame 23 by magic tape.

In one embodiment of the blackboard eraser set of the present invention, the blackboard eraser body is further provided with a blackboard eraser cover 34 detachably and firmly covering the front or back of the blackboard eraser body, and further, the blackboard eraser cover 34 is further provided with a handle 35 for easy grasping.

The utility model discloses a concrete application method does:

if the front surface (namely the first blackboard eraser cloth surface) of the blackboard eraser main body is required to be used for dry erasing the blackboard, firstly, the blackboard eraser cover 34 is firmly covered on the back surface of the blackboard eraser main body, then the control button 20 for controlling the suction fan 9 is pressed down, and the handle 35 on the blackboard eraser cover 34 is gripped for dry erasing the blackboard;

if the back surface (namely the second blackboard eraser cloth surface) of the blackboard eraser main body is required to be used for wet erasing a blackboard, the blackboard eraser cover 34 is firmly covered on the front surface of the blackboard eraser main body, then the control button 20 for controlling the water pump 15 is pressed down, and the handle 35 on the blackboard eraser cover 34 is gripped to perform wet erasing blackboard work;

after the blackboard is wiped, sealing covers on a dust outlet 19 of a dust collection cavity of a blackboard eraser main body and a water inlet 16 of a water storage cavity are opened, then the blackboard eraser main body is placed into a blackboard eraser placing cavity 24 in a blackboard eraser base, the dust outlet 19 of the dust collection cavity is communicated with an air induction port of a dust collection induced draft fan 29, the water inlet 16 of the water storage cavity is communicated with a water outlet of a water injection pump 28, then the dust collection induced draft fan 29 and the water injection pump 28 are controlled to be started, chalk powder in the dust collection cavity is sucked into a first drawing box 27, and sufficient clear water is injected into the water storage cavity 13 again;

the charging port 21 of the power supply 10 on the blackboard eraser main body is connected with the power supply input plug 33 on the blackboard eraser base, so that charging can be realized; the first plate wiper 1 and the second plate wiper 2 can collect chalk dust remaining thereon into the second drawer box 31 by scraping with the grid plate 30 on the base of the blackboard eraser.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person 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 generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended 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. A blackboard eraser set is characterized by comprising a blackboard eraser main body and a blackboard eraser base;

the blackboard eraser main body is hollow, a first plate eraser cloth (1) and a second plate eraser cloth (2) are respectively arranged on the front surface and the back surface of the blackboard eraser main body, the first plate eraser cloth (1) is a plurality of erasing strips which are arranged on the front surface of the blackboard eraser main body at intervals, and the second plate eraser cloth (2) is an erasing cloth which is integrally arranged on the back surface of the blackboard eraser main body; the rectangular cavity in the blackboard eraser main body is divided into four spaces by a transverse separating part parallel to the two pieces of blackboard eraser cloth; the first space (3) is adjacent to the first plate wiping cloth (1), a dust suction hole (4) is formed in one surface, close to the first plate wiping cloth (1), of the first space (3), then a second space (5), a third space (6) and a fourth space (7) are sequentially arranged in sequence, the fourth space (7) is adjacent to the second plate wiping cloth (2), and the surface, close to the second plate wiping cloth (2), of the fourth space (7) is integrally opened; the first space (3) is a dust collecting cavity; the transverse separation part between the first space (3) and the second space (5) is a filter screen (8), a suction fan (9) is installed in the second space (5), the suction fan (9) is powered by a power supply (10) arranged on the outer side surface of the blackboard eraser body, and an exhaust hole (11) is formed in one surface, far away from the power supply (10), of the second space (5); the transverse partition part between the second space (5) and the third space (6) is a first partition plate (12), the third space (6) is internally divided into a water storage cavity (13) and a water pump accommodating cavity (14), the water pump accommodating cavity (14) is positioned on one side close to the power supply (10), a water pump (15) is arranged in the water pump accommodating cavity (14), a water inlet of the water pump accommodating cavity is communicated with a water outlet of the water storage cavity (13), and a water storage cavity water inlet (16) with a sealing cover is arranged on one surface, far away from the power supply (10), of the water storage cavity (13); the transverse partition part between the third space (6) and the fourth space (7) is a second partition plate (17), one surface of the second partition plate (17) facing the fourth space (7) is uniformly provided with a plurality of spray heads (18) connected with water outlets of a water pump (15), and the water spraying surface of each spray head (18) faces the second board wiper (2); a dust outlet (19) with a sealing cover is arranged on one surface of the dust collection cavity far away from the power supply (10); the outer side surface of the blackboard eraser main body is also provided with a control button (20) for respectively controlling the suction fan (9) and the water pump (15);

the blackboard eraser base comprises a blackboard eraser placing cavity (24) arranged on one side, a double-layer placing cavity (25) arranged in the middle, a water tank (26) arranged above the other side and a first drawing box (27) arranged below the other side; a water injection pump (28) is arranged above the double-layer placing cavity (25), and a dust absorption induced draft fan (29) is arranged below the double-layer placing cavity; the water outlet of the water tank (26) is connected with the water injection pump (28), and the water outlet of the water injection pump (28) extends into the blackboard eraser placing cavity (24); the first drawing box (27) is communicated with the dust absorption draught fan (29), and an air suction opening of the dust absorption draught fan (29) also extends into the blackboard eraser placing cavity (24); when the blackboard eraser main body is arranged in the blackboard eraser placing cavity (24), a dust outlet (19) of the dust collecting cavity is communicated with an air induction port of the dust absorption induced draft fan (29), and a water inlet (16) of the water storage cavity is communicated with a water outlet of the water injection pump (28); the dust absorption draught fan (29) with water injection pump (28) provide operating voltage through external power source (10).

2. The blackboard eraser kit according to claim 1, wherein a plate eraser dust removing structure is further disposed on the blackboard eraser base, the plate eraser dust removing structure is disposed at an end of the blackboard eraser placing cavity (24) away from the double-layer placing cavity (25), and the plate eraser dust removing structure comprises a grid plate (30) located at an upper portion and a second drawing box (31) located at a lower portion of the grid plate (30).

3. A blackboard eraser kit according to claim 2, characterized in that the grid plate (30) is provided with baffles (32) around its periphery.

4. The blackboard eraser kit according to claim 1 or 2, wherein the blackboard eraser base is further provided with a power input plug (33) adapted to the charging port (21) of the power supply (10), and the power input plug (33) is connected to a wall socket or a power terminal board.

5. The blackboard eraser kit according to claim 1, wherein the front surface of the blackboard eraser body is provided with a fence-type first support frame (22) for mounting the first board eraser (1), the dust suction holes (4) in the first space (3) are provided with a plurality of rows, and the plurality of rows of dust suction holes (4) correspond to the empty spaces on the first support frame (22), and a plurality of the wiping strips are detachably mounted on the fence board of the first support frame (22).

6. The blackboard eraser set according to claim 1 or 5, characterized in that a rectangular second support frame (23) for mounting the second board eraser (2) is arranged on the back side of the blackboard eraser body, the middle of the second support frame (23) is hollowed out, the water spraying surface of the spray head (18) passes through the hollowed out part and faces the second board eraser (2), and the peripheral edges of the second board eraser (2) are detachably mounted on the four edges of the second support frame (23).

7. Blackboard eraser kit according to claim 1, characterized in that the suction fan (9) is a turbo fan.

8. The blackboard eraser kit according to claim 1, wherein the blackboard eraser body is further provided with an eraser cover (34) which can be detachably covered on the front surface or the back surface of the blackboard eraser body.

9. The blackboard eraser kit according to claim 8, wherein a handle (35) is provided outside the eraser cover (34).