KR950006888B1 - Vacuum blackboard eraser - Google Patents

Abstract

The vacuum chalk eraser is characterized by that a free and flexible hose passes through one side end of the chalk eraser comprising a brush and a motor to rotate the brush, so as to be associated with a vacuum cleaner comprising a vacuum pump and a filer therein like a conventional vacuum cleaner.

Description

Vacuum Blackboard Eraser

Figure 1a is a block diagram showing a state in which the vacuum blackboard eraser of the first embodiment of the present invention is installed on the blackboard for school, academy. 1B is an enlarged detail view showing a state in which the vacuum dust collector of the vacuum blackboard eraser of the first embodiment of the present invention is coupled with a track.

2a to 2e are views of the first embodiment of the vacuum blackboard eraser of the present invention, Figure 2a is a plan view of the blackboard eraser, Figure 2b is a bottom view of the blackboard eraser, Figure 2c is a side view of the blackboard eraser, 2d FIG. 2A is a cross-sectional view taken along the line AA in FIG. 2A, and FIG. 2E is a plan view of the blackboard eraser with the top cover removed.

3A is a plan view of the second embodiment of the vacuum blackboard eraser of the present invention with the top cover removed. 3B is a sectional view of the blackboard eraser of the second embodiment.

4 is a block diagram showing a state when the vacuum blackboard eraser of the second embodiment of the present invention is used for the simple blackboard.

* Explanation of symbols for main parts of the drawings

1: blackboard eraser 2: vacuum dust collector

3: hose 4: eraser hanger

5: orbit 6: roll

7: upper cover 8: gasket

9: lower cover 11: motor

12: brush 20: brush lever

21: cloth eraser hair 25: cloth eraser

26 opening

[Field of Invention]

The present invention relates to a vacuum blackboard eraser for erasing a blackboard by vacuum.

More specifically, the present invention relates to a vacuum blackboard eraser that uses a small motor to rotate the brush and forcibly shakes off the chalk powder from the blackboard by using the rotational force of the brush and sucks the chalk powder with a vacuum dust collector.

[Background of invention]

In the case of teaching at various schools or various institutes, general offices, etc., the blackboard is often used for employee education or meetings.

When the board is erased with a cloth cloth, chalk powder is thrown everywhere and floats in the classroom or the office. The chalk powder is inhaled by the people in the classroom or office, which not only has a detrimental effect on health, but also a bad effect on the educational environment. Gave.

In addition, after the board is erased once or twice with a conventional cloth eraser, the cloth eraser gets a lot of chalk powder so that the board cannot be erased anymore.In this case, take the cloth eraser out of the classroom or office and place the cloth eraser on the eraser hair or building wall. There was an inconvenience to whisk and remove the chalk powder. Even when the chalk dust is blown from the cloth eraser by the eraser, etc., a large amount of chalk dust is blown in all directions, and the person who inquires the chalk dust must inhale while the cloth eraser is blown and the cloth eraser is blown against the building wall. There was a problem of getting dirty with chalk powder on the wall. In order to improve the problems of the conventional blackboard eraser as described above is to devise a vacuum blackboard eraser.

On the other hand, according to the Republic of Korea Open Utility Model Publication No. 89-4706, the electric blower made of a combination of the motor and the fan inside the main body and located in the front of the electric blower and the filter formed to protrude into the dust container downward to the filter It describes a black eraser cleaner constructed by combining a brush and an auxiliary roller that is exposed by cutting a portion of the bottom of the main body to be rotated by a separate motor so that the blackboard can be cleaned. Since it includes a motor, a fan, a dust chamber, and a roller, the handle is formed on the outer surface for gripping by hand, but it was bulky and heavy, making it unsuitable for practical cleaning of the board. .

In addition, Japanese Unexamined Utility Model Publication No. 58-72094 describes a suction-type black plate eraser, which is formed by fixing an extension tube along the bottom of the blackboard, and an electric blower is mounted at one end of the extension tube. The dust collecting chamber is fixed with a built-in, and at the other end, an eraser is mounted on the other end so that the cleaning brush is rotatably mounted on the inside, and is restored by a spring on the hanging hook using the hook formed on the outer surface of the eraser. When the eraser is removed from the hook portion by forming a switch, the electrical contact is connected by the restoring force of the spring to operate the electric blower to clean the black board, and after the cleaning is completed, the eraser is hung on the hook. The electrical contact is shorted by weight to stop the electric blower from operating. It consists of easy to use one, and a plethora of facilities needed to clean the blackboard, there is a suction seat, so the blackboard eraser should be installed separately cost a lot of shortcomings in one blackboard.

[Purpose of invention]

An object of the present invention is to prevent the chalk dust floating in the classroom or general office by inhaling the chalk dust generated when cleaning the blackboard with a blackboard eraser to prevent the health of educators and trainees or employees of the office and To provide a vacuum blackboard eraser that provides a comfortable educational environment.

Another object of the present invention is to provide a vacuum blackboard eraser that eliminates the inconvenience of having to whisk the chalk powder like a conventional cloth eraser by sucking the chalk powder generated when wiping the blackboard with an eraser.

[Summary of invention]

The present invention provides a vacuum dust collector including a brush and a motor for rotating the brush, a vacuum pump including a vacuum pump and filtering means, a hose connecting the blackboard eraser and the vacuum dust collector, and a moving means for moving the vacuum dust collector. consist of.

[Description of Specific Example of the Invention]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1a is a block diagram showing a state where the vacuum blackboard eraser of the first embodiment of the present invention is installed on a blackboard for school and academy, and FIG. 1b is an enlarged detail view showing a state where the vacuum dust collector shown in FIG. to be.

The vacuum blackboard eraser of the present invention includes a vacuum cleaner (1) including a brush and a motor for rotating the brush therein, a vacuum pump and filtering means therein, and an eraser hook (4) attached to the outside ( 2), a hose (3) for freely bending the blackboard eraser (1) and the vacuum dust collector (2) and a roll attached to the vacuum dust collector side to move the vacuum dust collector (2) to the left and right of the board The base 6 and the roller 6 are movably coupled to each other, and constitute a moving means composed of a track 5 mounted on a wall.

2A to 2E show a first embodiment of the blackboard eraser of the vacuum blackboard eraser of the present invention.

The chalkboard eraser 1 includes a brush 12 and a pulley 13 and a belt 14 formed on the brush 12 and a brush 12 rotatably installed in the main body of the chalkboard eraser including an upper cover 7 and a lower cover 9. The motor 11 which rotates the sole 12 by transmitting rotational force is comprised. The sole 12 is provided so that a part of the sole 12 protrudes out of the eraser main body through the opening 26 of the lower cover 9. Four rollers 6 are installed on the lower cover 9 so that the blackboard eraser 1 can be easily moved in contact with the blackboard. The gasket 8 is located between the upper cover 7 and the lower cover 9 so that air leaks between the upper cover 7 and the lower cover 9 when the vacuum dust collector 2 vacuum sucks chalk powder. It is configured to prevent going.

In the main body of the blackboard eraser 1, the motor storage chamber 15 is separately configured so that chalk powder does not enter the motor 11, and the motor 11 is mounted on the dustproof caps 16 and 17 fitted in the front and rear sides. It is provided in the motor storage chamber 15 so that vibration may not occur.

Ventilation openings 18 are formed on the outer wall of the motor storage chamber 15 to cool the motor heat, and dust such as chalk powder from the outside may not enter the motor storage chamber 15 through the ventilation opening 18. In order to achieve this, the filter 19 is attached to the inside of the outer wall of the motor storage chamber 15.

The upper cover 7 of the blackboard eraser 1 is configured with a switch 10 for simultaneously applying power to the brush 11 motor for exclusive use of the brush and the vacuum pump of the vacuum dust collector 2.

Inside the upper cover 7 of the blackboard eraser of the first embodiment is composed of a brush hair lever 20 as shown in Figure 2d so that the hair of the end of the brush 12 while the hair brush lever 20 It is to be able to brush the chalk powder in contact with the inside of the upper cover of the eraser of the second embodiment, as shown in FIG. 3b, the brush hair lever 20 and the cloth eraser hair 21 are configured.

The blackboard eraser 1 is coupled by screwing the screw 22 to the screwing member 23 of the upper cover 7 through the lower cover 9. It is preferable that the size of the blackboard eraser 1 be about the size of a conventional cloth eraser so that it can be easily grasped with one hand.

3A is a plan view of a state where the upper lid is removed in the second embodiment of the vacuum blackboard eraser 1 of the present invention.

The second embodiment of the blackboard eraser 1 differs from the first embodiment in terms of construction as follows. The blackboard eraser 1 of the first embodiment brushed out the chalk powder of the blackboard only with the brush 12, but the blackboard eraser of the second embodiment additionally provided a cloth eraser 25 having a non-woven fabric attached to the cylindrical area. The cloth eraser 25 shakes off the chalk powder of the board which cannot be shaken off. The rotation of the cloth eraser 25 is made by the belt 24.

The vacuum dust collector 2 has a structure similar to a vacuum cleaner widely used at present, and a vacuum pump and filtration means are configured therein, and an existing vacuum cleaner may be used as it is.

The vacuum dust collector 2 of the vacuum blackboard eraser of the first embodiment is rolled on the side as shown in FIG. 1B to make it suitable for use on a board fixed to the wall as shown in FIG. 1A. Base 6 is rotatably provided.

The vacuum precipitator 2 of the vacuum blackboard eraser of the second embodiment is configured with wheels to make the vacuum blackboard eraser suitable for use in a simple blackboard as shown in FIG.

On the outside of the vacuum dust collector 2, an eraser hanger 4 is configured to hang when the blackboard eraser 1 is not used.

The hose (3) connecting the chalkboard eraser (1) and the vacuum dust collector (2) is made of a material that can be bent freely and has a sufficient length to place the chalkboard eraser (1) anywhere on the board.

In the vacuum blackboard eraser of the first embodiment, the moving means for moving the vacuum dust collector 2 is a defect of the track 5 installed on the wall under the blackboard and the roller 6 rotatably installed on the side of the vacuum dust collector 2. In the vacuum blackboard eraser of the second embodiment, the wheel constituted by the vacuum dust collector is a moving means of the vacuum dust collector.

The operation of the vacuum blackboard eraser of the present invention is as follows. When the switch 10 attached to the upper cover 7 of the blackboard eraser 1 is operated, the motor 11 in the blackboard eraser and the vacuum pump in the vacuum dust collector start to rotate at the same time. For example, when the motor 11 inside the blackboard eraser rotates at about 4,000 to 4,500 rpm (round per minute), the brush 12 connected to the motor and the belt rotates in the case of the blackboard eraser of the first embodiment. In the case of the blackboard eraser of the second embodiment, the brush 12 and the cloth eraser 25 rotate together with the motor 11. When the brush 12 or the brush 12 and the cloth eraser 30 begin to rotate, the blackboard eraser 1 is placed on the surface of the blackboard written in chalk. At this time, a portion of the brush 12 is protruded so as to contact the surface of the blackboard eraser, and the rotating brush 12 shakes off the chalk powder of the blackboard and some chalk powder is sucked into the main body of the blackboard eraser, and some of the chalk powder is brushed on the brush 12. The chalk powder buried in the brush 12 is swept away while the brush 12 is in contact with the brush lever 20 in the main body of the blackboard eraser, and the hose (3) is sucked by the vacuum pump suction force in the vacuum dust collector. It is sucked into the vacuum dust collector (2) through. The cloth eraser 25 constituted by the blackboard eraser of the second embodiment serves to erase the chalk marks that are not erased by the brush 12, but the chalk dust on the cloth eraser 25 is the cloth eraser hair inside the main body of the blackboard eraser ( 21) is shaken off.

The effect of the vacuum blackboard eraser of the present invention is as follows. When you want to erase the blackboard, it does not hurt the health of people because it does not blow the chalk powder, and there is no inconvenience to shake off the chalk powder like a conventional cloth eraser, and it does not fly to the classroom, classroom or general office to provide a pleasant environment. By changing the dust bag in the vacuum dust collector 2 about once every 4 to 5 days, the processing of chalk powder is very simply completed.

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made within the spirit and scope of the invention and therefore such variations and modifications are within the scope of the appended claims.

Claims (6)

One end of a blackboard eraser configured with a brush and a motor for rotating the brush can be fluidly connected to a vacuum dust collector having a vacuum pump and filtration means inside the same way as a conventional vacuum cleaner via a hose capable of free bending. Vacuum blackboard eraser, characterized in that configured to. According to claim 1, wherein the brush of the blackboard eraser and the motor or brush, the cloth eraser and the motor is formed inside the body consisting of the upper cover and the lower cover, and the rotational force of the motor through the pulley and the belt brush or brush and cloth eraser Vacuum blackboard eraser, characterized in that to be delivered to. According to claim 2, wherein the upper cover of the blackboard eraser or brush and a cloth eraser motor and a switch for applying power to the vacuum pump of the vacuum dust collector at the same time is configured, the brush head or brush inside the upper cover The vacuum blackboard eraser, characterized in that the hair lever and cloth eraser is composed integrally. The vacuum blackboard eraser according to claim 2, wherein the motor storage chamber is formed inside the main body of the blackboard eraser, and the motor storage chamber is installed in the motor storage chamber so that the vibration does not occur by the dust cap fitted to the front and rear. According to claim 4, Ventilation openings are formed in the outer wall of the motor storage compartment to cool the heat of the motor, the outside of the outer wall of the motor storage compartment to prevent dust, such as chalk powder from entering the motor storage compartment through the vent opening Vacuum blackboard eraser characterized in that the filter attached to the inside. The vacuum blackboard eraser according to claim 1, wherein a roller is installed on the lower cover of the main body so that the blackboard eraser can be easily moved in contact with the blackboard.