CN102825951A - Teaching blackboard - Google Patents

Abstract

A teaching blackboard, comprising a board body, a gray screen, and an electric shaft, the gray screen rolls and is wound on the electric shaft, the upper and lower ends of the gray screen are provided with pulleys, and the electric shaft is connected with the pulleys; the upper and lower ends of the gray screen The pulley is embedded with the shielding screen track, and the electric shaft is equipped with a brush plate; the dust suction device includes an electrostatic dust collection plate; the long plate brush is set on the telescopic electric gate bar, the telescopic electric gate bar is connected with the power box of the telescopic electric gate bar, and the ultrasonic generator is set In the long board brush, the ultrasonic generator is connected with the power box of the telescopic electric gate; the upper and lower sides of the long board brush are embedded in the long board brush track; area and timing electric control area. The invention can clean the blackboard completely without generating dust, and does not generate air pollutants in the whole process, and does not need manpower to be completed, and can be completed automatically by electric power.

Description

teaching blackboard

technical field

The invention relates to a teaching blackboard.

Background technique

As students, we clean up and wipe the blackboard every day. These are very simple things, but in fact, many students are unwilling to wipe the blackboard during the daily duty. Blackboard, why is this?

Reason 1: Because when you wipe the blackboard, there will be a lot of chalk dust. After the chalk dust is inhaled, it will make people cough continuously, and it will also cover your clothes and hair with a layer of white chalk dust that is difficult to wipe off. If it is heavy gray, it is not only your clothes and hair, but also your face and neck are covered with that hateful white ash.

Reason 2: In order to increase the ability of astigmatism, the surface of the general blackboard is made rough, and the words written on it are difficult to erase, so it takes a lot of effort to wipe the blackboard, so people will be confused after wiping the blackboard. Sweat a little, and the sweat combines with chalk dust to make it harder to wipe off.

Therefore, many students do not want to wipe the blackboard.

Generally speaking, the seats in the first two rows in the classroom should be the most popular, but in fact, many students refuse to sit in the first two rows. Why? It turned out that the culprit was the nasty chalk dust, because the teacher would write on the blackboard after every class, and when the students on duty after class wiped the blackboard, the air in the first two rows was filled with a lot of chalk dust. After a day like this, there is a thick layer of dust on their desks and books. However, these are not the only victims, because a large amount of dust is trapped in the air, which has a great impact on the study and life of the students and the teaching of the teachers, and is even more devastating to their health. According to relevant medical reports, if people are in a dusty environment, people are prone to pneumonia, respiratory infections, bronchitis, pneumoconiosis and other diseases. From this point of view, chalk dust has brought great threat to the physical and mental health of classmates and teachers. So should chalk be disabled? But can't find the product that can replace it again. Chalk is an important thing in teaching, but its use has a negative impact on people's health. So how can we solve the problem of not only needing a blackboard but also not generating dust?

Contents of the invention

The object of the present invention is to provide a teaching blackboard, which eliminates the hidden danger of chalk dust, is easy to use, and has a simple structure.

Technical solution of the present invention is:

A teaching blackboard, including a board body, a dust removal device, a dust suction device, an erasing device and an electric control center device, its special features are:

The ash removal device includes an ash screen that is prone to static electricity and an electric shaft. The ash screen is rolled and wound on the electric shaft. Pulleys are provided at the upper and lower ends of the ash screen, and the electric shaft is connected to the pulley. , the electric shaft is connected to the electric shaft power box; the upper and lower sides of the board body are provided with shielding screen tracks, the pulleys at the upper and lower ends of the gray screen are embedded with shielding screen tracks, and the electric shaft is provided with a brush plate;

The dust suction device includes an electrostatic dust collection board; the electrostatic dust collection board is located inside the upper and lower planes of the board body;

The erasing device includes a long board brush, a telescopic electric gate, a telescopic electric gate power box, and an ultrasonic generator; the long board brush is arranged on the telescopic electric gate, and the telescopic electric gate is connected with the telescopic electric gate power box. The generator is arranged in the long board brush, and the ultrasonic generator is connected with the power box of the telescopic switch bar; the upper and lower sides of the board body are also provided with long board brush tracks, and the upper and lower sides of the long board brush are embedded in the long board brush tracks;

The electric control central device includes a gray screen electric control area, an ash suction electric control area, an erasing electric control area and a timing electric control area.

The central device of the above-mentioned electric control area includes two switches, one is to control all the starting, and the other switch is to control the power box of the telescopic electric gate, thereby controlling the self-vibration of the brush, and removing dust and chalk dust on the brush body; the power box of the telescopic electric gate is Including the power box for the left electric gate and the power box for the right electric gate.

The size of the gray screen mentioned above is the same as or slightly smaller than the size of the board body. This is because it is not necessary to fill the entire board when writing, and the gray screen should be slightly smaller.

The length of the above-mentioned long board brush is equal to or slightly less than the height of the board body. This is because it is not necessary to fill the entire board when writing, and the length of the long board brush should be slightly smaller. In fact, the upper and lower sides should be 3 cm smaller.

The above-mentioned gray screen that is prone to static electricity refers to a gray screen that is synthesized by industrial plastics.

The advantages of the present invention are:

1) The innovation of this invention is that it can wipe the blackboard completely without generating dust, and no air pollutants will be generated during the whole process, and it does not need manpower to complete it, and it can be completed automatically by electricity.

2) Easy to operate, just turn on the power and it will be done automatically.

3) Eliminate the hidden danger of chalk dust, and also greatly improve the working environment of teachers, and promote the teaching process.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the internal structure diagram of the scrub brush of the present invention.

Explanation of reference numerals: 1—Long board brush track, 2—Electrostatic vacuum board, 3—Left switch bar power box, 4—Long board brush, 5—Right switch bar power box, 6—Pulley, 7—Blade gray screen, 8 - electric shaft, 9 - gray screen track, 10 - brush plate, 11 - electric shaft power box, 12 - telescopic switch bar, 13 - ultrasonic generator, 14 - plate body.

Detailed ways

Referring to Fig. 1, a kind of teaching blackboard comprises a board body 14, a dust removal device, a dust suction device, an erasing device and an electric control center device, and the dust removal device includes a dust removal screen 7 and an electric shaft 8 synthesized by industrial plastics, and the The gray screen 7 is scrolled and wound on the electric shaft 8, the upper and lower ends of the gray screen 7 are provided with a pulley 6, the electric shaft 8 is connected to the pulley 6, and the electric shaft 8 is connected to the power box 11 of the electric shaft The upper and lower sides of the plate body 14 are provided with shielding screen tracks 9, the pulleys 6 at the upper and lower ends of the dust screen 7 are embedded with shielding screen tracks 9, and the electric shaft 8 is provided with a brush plate 10; the dust suction device includes It is an electrostatic dust-absorbing board 2; the electrostatic dust-absorbing board 2 is located at the inner side of the upper and lower planes of the plate body 14; the erasing device includes a long board brush 4, a telescopic electric gate bar 12, a telescopic electric gate bar power box, and an ultrasonic generator 13; The long plate brush 4 is arranged on the telescopic electric gate bar 12, and the telescopic electric gate bar 12 is connected with the power box of the telescopic electric gate bar. The ultrasonic generator 13 is arranged in the long plate brush 4. connection, see Figure 2; the upper and lower sides of the board body 14 are also provided with a long brush track 1, and the upper and lower sides of the long brush 4 are embedded in the long brush track 1; the electric control center device includes a gray screen electric control area, a suction Gray electric control area, erase electric control area and timing electric control area.

The central device of the electric control area includes two switches, one is to control all the starting, and the other switch is to control the power box of the telescopic electric gate, so as to control the self-vibration of the brush and remove the chalk dust on the brush body; the power box of the telescopic electric gate includes The power box 3 of the left electric gate bar and the power box 5 of the right electric gate bar.

Spare gray screen 7 size is identical with plate body 14 sizes or slightly smaller. The length of long board brush 4 is equal to or slightly less than the height of board body 14. This is because when writing, it is not necessary to fill the entire board. The gray screen should be slightly smaller. In fact, it should be 3 cm smaller from top to bottom. The length of the long board brush should be slightly smaller. That's it.

During the work of the present invention, referring to Fig. 1 and Fig. 2, the circuit is switched on, and at the beginning, the electric shaft 8 releases the gray screen 7 (the lower end is equipped with a pulley 6), and the gray screen 7 follows the gray screen track 9 on the upper and lower sides of the blackboard from the right. Movement to the left. When the gray screen 7 arrived at the left end, the circuit of the erasing device was also turned on. The long board brushes 4 on both sides move back and forth on the telescopic switch bar 12, and at this moment the ultrasonic generator 13 (being contained in the long board brushes 4) starts to produce ultrasonic waves. Because the two ends of the long board brush 4 are equipped with pulleys 6, the long board brush 4 moves along the special long brush version track 1 during the movement, and the bristles are close to the blackboard surface, and the long board brushes 4 at both ends move back and forth left and right and ultrasonic waves are added to chalk The role of characters (ultrasonic waves can loosen chalk characters and be easily wiped off by a board brush) the characters on the board surface are quickly removed. The long board brush 4 has made the dust screen 7 to generate static electricity (triboelectrification due to air movement) when moving. And electrostatic dust-absorbing board 2 has also produced static electricity under the friction of the upper end bristle of long board brush 4. Under their joint action, the brushed off chalk dust is adsorbed to their surfaces. The chalk dust on the electrostatic dust collection board 2 at the upper and lower ends will be brushed to the left and right sides of the blackboard by the long board brush 4, and the chalk dust on the dust screen 7 will be installed on the electric shaft 8 when it is retracted into the electric shaft 8. The brush plate 10 on the top is brushed off. When the set time has arrived, telescopic switch bar 12 can shrink to the left and right sides of blackboard, and sonotrode 13 stops working. Spare gray screen 7 slowly rolls back on the electric shaft 8 on the right side from the left end, and work is finished.

The application object of the present invention: it is mainly aimed at teaching in schools, and can be widely applied to various schools (high schools, elementary schools, kindergartens, universities, etc.).

Claims (5)

1. a blackboard for education comprises plate body (14), worn-out apparatus for ash, dust exhaust apparatus, erasing apparatus and automatically controlled middle armature assembly, it is characterized in that:

Said worn-out apparatus for ash comprises worn-out ash screen (7), the electric drive axle (8) that is prone to produce static; Said worn-out ash screen (7) scrolling is wrapped on the electric drive axle (8); Said worn-out ash screen (7) upper and lower end is equipped with pulley (6); Said electric drive axle (8) is connected with pulley (6), and said electric drive axle (8) connects in electric drive axle headstock (11); Said plate body (14) both sides up and down is provided with shielding screen track (9), the embedded shielding screen of pulley (6) track (9) of said worn-out ash screen (7) upper and lower end, and said electric drive axle (8) is provided with brush board (10);

Said suction apparatus for ash comprises it being electrostatic precipitation plate (2); Said electrostatic precipitation plate (2) is positioned at plate body (14) inboard, two planes up and down;

Said erasing apparatus comprises long slab brush (4), flexible electric brake hurdle (12), flexible electric brake hurdle headstock, ultrasonic wave generator (13); Said long slab brush (4) is arranged on the flexible electric brake hurdle (12); Said flexible electric brake hurdle (12) is connected with flexible electric brake hurdle headstock; Said ultrasonic wave generator (13) is arranged in the long slab brush (4), and said ultrasonic wave generator (13) is connected with flexible electric brake hurdle headstock; Said plate body (14) both sides up and down also is provided with long slab brush track (1), in the embedded long slab brush tracks in the both sides up and down of said long slab brush (4) (1);

Said automatically controlled middle armature assembly comprises the automatically controlled district of worn-out ash screen, inhales grey automatically controlled district, wipes automatically controlled district and the automatically controlled district of timing.

2. according to the said blackboard for education of claim 1; It is characterized in that: armature assembly comprises two switches in the said automatically controlled district, controls all startups for one, and a switch is the flexible electric brake hurdle of a control headstock; Thereby the self-vibration of control scrubbing brush, the chalk dust on the brush body is removed in dedusting; Said flexible electric brake hurdle headstock comprises left electric brake hurdle headstock (3) and right electric brake hurdle headstock (5).

3. according to claim 1 or 2 said blackboard for education, it is characterized in that: said worn-out ash screen (7) size is identical or smaller with plate body (14) size.

4. according to the said blackboard for education of claim 3, it is characterized in that: the length of said long slab brush (4) is equal to or slightly less than the height of plate body (14).

5. according to the said blackboard for education of claim 4, it is characterized in that: the worn-out ash screen (7) of said easy generation static is meant by the synthetic worn-out ash screen of industrial plastic.

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