KR20070119127A - Electric blackboard eraser - Google Patents

Abstract

The present invention relates to an electric blackboard eraser, provided with a pair of chalk whisks having different rotational speed ratios, and at the same time wiping the chalk powder automatically to keep the chalk whisk clean and always clean the board surface. In addition, it also provides an electric blackboard eraser that can create a comfortable indoor environment by preventing the scattering of the chalk dust generated by the automatic whisk chakgeol dust to scatter around.

Description

Electric Blackboard Eraser {Electromotion Board Eraser}

1 is a perspective view showing an electric blackboard eraser according to the present invention.

Figure 2 is a plan view showing a drive unit of the electric blackboard eraser according to the present invention.

Figure 3 is a perspective view of the chalk whisk of the electric blackboard eraser according to the present invention.

4 is a cross-sectional view showing the purifying means of the electric blackboard eraser according to the present invention.

       * Explanation of symbols for the main parts of the drawings *

            100: case 110: link

            120: tension spring 200: chalk feather

            210: home 300: dust collection duct

            310: outlet 320: suction fan

            330: secondary outlet 331: lid

            350: purification means 351: water tank

            352: air outlet 400: drive unit

            410: motor 420: first gear

            430: second gear 421,431: drive shaft

            440: external 450: universal joint

            500: transfer unit 510: third gear unit

            520: Pinion 530: rack

            540: auxiliary roller

The present invention relates to an electric blackboard eraser, and more particularly, to an electric blackboard eraser for wiping a blackboard surface written in chalk in a short time, automatically brushing off the polished chalk powder, and collecting and purifying dust generated. .

Generally, the blackboard eraser is used to erase the chalk powder written on the blackboard, and there is a manual method to remove the chalk powder by rubbing it directly. However, the manual eraser says that the chalk powder is scattered when the blackboard is erased, which greatly threatens the health of the respiratory system of the blackboard user. Recently, a lot of electric blackboard erasers are automatically removed to collect and collect chalk.

Such a conventional electric blackboard eraser has a case which is mostly open to the side in contact with the blackboard and mounted vertically to the blackboard, a chalk curler rotatably installed inside the case, a drive unit for rotating the chalk curler, and It consists of a conveying part which moves the rotating chalk hair laterally.

However, the chalk whiskers are made of only one, but the structure is complicated because a separate device that needs to be brushed off the chalk whisk buried with the brushed chalk dust is complicated, the pair of chalk whisks at the same speed by the drive unit As it rotates, the wiped chalk powder will continue to be buried in the chalk whisk, and it will be pressed against each other in contact with the rotating whisk, causing the chalk whisk to stick together.

Therefore, if you use a few times without brushing the chalk dust wiped on the chalk whisk, not only the blackboard is not wiped well, but also a trace of wiping remains and there was a problem that the chalk powder is scattered a lot during wiping.

Accordingly, the present invention has been made to solve the fundamental problems of the prior art,

It is an object of the present invention to provide a pair of chalk whiskers with different rotational speed ratios to wipe off the chalk powder automatically and at the same time automatically to keep the chalk whiskers always clean, and also to clean the board surface more clean electric blackboard Is to provide an eraser.

Another object of the present invention is to provide an electric blackboard eraser that can create a comfortable indoor environment by preventing the scattering of the chalk dust generated by the whisk automatic whisk automatically to prevent scattering around.

In order to achieve the above object, the present invention is open to the side in contact with the blackboard and mounted vertically on the blackboard, a pair of chalk furnish is rotatably installed in the interior of the case, and communicating with the inside on one side of the case In the electric blackboard eraser consisting of a dust collecting duct, a drive unit for rotating the pair of chalk whisk, an outer body covering the drive unit, and a transfer unit for moving the rotating chalk whisk in the lateral direction,

The drive unit comprises a first gear that is rotated by the drive of the motor, and a second gear meshed with the first gear and the first gear and the rotational speed ratio is different from the chalk hair connected to the drive shaft of the first gear; Characterized in that the rotational speed ratio of the chalk whisk connected to the drive shaft of the second gear is different.

The outer periphery of the chalk whisk is characterized in that the groove is formed in the longitudinal direction along the outer periphery in the shape of a screw.

A plurality of links are hingedly coupled to one side of the case and connected to an outer body covering the driving unit, and tension springs are provided between the links, and the chalk drive unit is provided with a universal joint on the upper drive shaft of the chalk unit. It is characterized in that it is possible to adjust the strength to be in close contact with the blackboard by the tension spring.

And, the outlet of the dust collecting duct is characterized in that it is provided with a purifying means.

In addition, one side of the discharge port of the dust collecting duct is characterized in that it further comprises an auxiliary discharge port coupled to the lid opened and closed by pressure.

(Example)

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above in more detail as follows.

1 is a perspective view showing an electric blackboard eraser according to the present invention, FIG. 2 is a plan view showing a driving unit of the electric blackboard eraser according to the present invention, and FIG. 3 is a chalk clipper of the electric blackboard eraser according to the present invention. 4 is a perspective view of the drawing, and FIG. 4 is a cross-sectional view showing the purification means of the electric blackboard eraser according to the present invention, respectively.

As can be seen from the present invention is a pair of the case 100 is opened to the side in contact with the blackboard 10 and mounted vertically to the blackboard 10, rotatably installed inside the case 100 Chalk cutlery 200, the dust collector 300 is in communication with the inside in the center of the case 100, the drive unit 400 for rotating the pair of chalk whisk 200 and the outer body to cover the drive unit 440, and the transfer unit 500 for moving the rotating chalk whisk 200 in the lateral direction.

The driving unit 400 includes a first gear 420 that is rotated by the driving of the motor 410, and a second gear 430 that meshes with the first gear 420.

The second gear 430 has a greater number of gears meshing with the first gear 420, so that the rotation speed of the second gear 430 is slower than the rotation speed of the first gear 420.

At this time, the number of the first gear 420 may be larger than the number of the second gears 430 so that the rotation speed of the first gear 420 may be slowed.

Accordingly, the rotational speed ratios of the chalk curlers 200 connected to the drive shaft 421 of the first gear 420 and the chalk curlers 200 connected to the drive shaft 431 of the second gear 430 are different from each other. will be.

The moving part 500 includes a third gear part 510 for converting the rotational motion into a linear motion on the drive shaft 421 of the first gear, and the linear motion driving shaft 511 of the third gear part 510. In the pinion 520, the pinion 520 is engaged with the left and right to move the rack 530 is provided on the upper side of the blackboard 10, the rotating chalk whisk 200 to the horizontal of the blackboard 10 To move in the direction of

At this time, the secondary roller 540 connected to the pinion 520 is provided at the bottom of the rack 530 so as to smoothly move the pinion 520 engaged with the rack 530 to support the pinion 520 and the rack ( It is desirable for the engagement with 530 to be accurate.

Here, the motor 410 uses a forward and reverse motor to move the moving part left and right.

The chalk whisk 200 forms a groove 210 in the longitudinal direction along the outer circumference to have a screw shape. As an example, when the chalk fur stopper 200 is made of cloth, the cloth may be wound so that a screw-shaped groove 210 is formed, and the groove 210 is formed in the longitudinal direction along the outer circumference when the sponge is made of sponge or natural hair. It can form.

The reason why the grooves of the chalk whisk is formed in a screw shape is that when the grooves of the chalk whisk are vertically formed, splashing occurs when the chalk whisk rotates on the surface of the chalk whisk so as to suppress the popping phenomenon and improve the frictional force. will be.

Therefore, the polishing surface of the chalk whisk 200 is not flat, so that the surface of the blackboard 10 is better polished, and the chalk dust is better shaken off.

In the center of the case 100 is provided with a dust collecting duct 300 provided therein a suction fan 320 penetrating the inside of the case 100 and sucked out the chalk dust dust from the chalk whisk 200.

At this time, the shape of the case 100 is preferably to have an inclined shape in which the dust of the chalk powder is collected in the center so that the center is protruded so as to be easily sucked into the dust collecting duct 300.

At this time, the dust collecting duct 300 is made of an elastic pipe that increases in length and decreases with the movement of the chalk whisk 200, and the outlet 310 of the dust collecting duct 300 is provided with a purifying means 350.

The purifying means 350 includes a water tank 351 filled with water so that the outlet 310 of the dust collecting duct 300 is locked, and an air outlet 352 at the upper end of the water tank 351.

Therefore, the dust of chalk powder sucked into the dust collecting duct 300 is dissolved in the water and only the purified air is discharged to the outside through the air outlet 352.

However, when the water outlet of the dust collecting duct 300 is frozen in the winter, the outlet of the dust collecting duct 300 is blocked in order to prevent backflow of chalk dust or overloading. 310 is provided with an auxiliary outlet 330 on one side.

The auxiliary outlet 330 is provided with a lid, when the outlet 310 is not clogged so that the dust of chalk powder is discharged to the outlet 310 and is opened by pressure when the outlet 310 is blocked. do.

One side of the case 100 is hinge-coupled with a plurality of links 110 are connected to the outer body 440 covering the drive unit 400, the tension spring 120 is provided between the links 110, The upper drive shafts 421 and 431 of the chalk curler 200 are provided with a universal joint 450.

Therefore, when the chalk whisk 200 or when necessary, the chalk whisk 200 is flipped forward to facilitate the replacement and cleaning work.

In addition, the tension spring 120 between the links 110 serves to control the strength of the chalk whisk 200 is in close contact with the blackboard 10 and to suppress the repulsive force to rotate.

Referring to the operation of the present invention made of a configuration as described above are as follows.

First, when power is applied, the motor 410 and the suction fan 320 are driven, and the first gear 420 and the second gear 430 are rotated while being engaged by the driving of the motor 410. The chalk clipper 200 connected to the drive shafts 421 and 431 of the first gear 420 and the second gear 430 rotates the rotational speed ratio differently to erase the chalk powder written on the blackboard 10.

At this time, the screw-shaped groove of the chalk whisk suppresses the phenomenon of splashing when the friction with the blackboard surface and the friction with the blackboard (10) surface is good to erase the chalk powder on the blackboard surface better.

The erased chalk powder is shaken out by the speed difference of the chalk whisk 200 which is rotated differently, and the dust of the shaken chalk dust is sucked into the dust collecting duct 300 in which the suction fan 320 operates to purify the means 350. Only filtered air is discharged to outside after it is filtered by).

The chalk whisk 200 continues to operate in the same process as described above to wipe the surface of the blackboard 10 written in chalk while moving in the transverse direction by the moving unit 500.

Therefore, it is possible to wipe out the chalk powder automatically and at the same time, to keep the chalk head clean at all times, and to clean the surface of the board more cleanly. It is possible to create a pleasant indoor environment by preventing them.

Although the present invention has been shown and described with reference to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and the general knowledge in the art to which the present invention pertains falls within the scope of the present invention. Various alternative changes and modifications will be possible by the possessor.

As described above, the present invention is provided with a pair of chalk whisks having different rotation speed ratios, and at the same time wiping the chalk powder automatically, the chalk whisk can always be kept clean, and the board surface can be cleaned more cleanly. It can be effective.

In addition, it is effective to create a pleasant indoor environment by preventing the scattering of the chalk dust generated by the automatic chakjeol chakgeol dust to be scattered around.

Claims (5)

A case 100 having a side contacting the blackboard 10 and being vertically mounted to the blackboard 10, a pair of chalk curlers 200 rotatably installed in the case 100, and the case A dust collecting duct 300 which communicates with the inside of the center 100, a driving unit 400 for rotating the pair of chalk feathers 200, an outer body covering the driving unit, and the rotating chalk feather 200 In the electric blackboard eraser made of a conveying unit 500 for moving the lateral direction, The driving unit 400 meshes with the first gear 420 rotated by the driving of the motor 410 and the first gear 420 but has a second rotational speed ratio different from that of the first gear 420. The rotational speed ratio of the chalk whisk 200 connected to the drive shaft 421 of the first gear and the chalk whisk 200 connected to the drive shaft 431 of the second gear is composed of a gear 430. Electric blackboard eraser. The method of claim 1, Electric chalk eraser, characterized in that the groove 210 is formed in the longitudinal direction along the outer periphery of the screw shape on the outer circumferential surface of the chalk curler 200. The method of claim 1, One side of the case 100 is hinge-coupled with a plurality of links 110 are connected to the outer body 440 covering the drive unit 400, the tension spring 120 is provided between the links 110, The upper drive shafts 421 and 431 of the chalk curler 200 are provided with universal joints 450 so that the chalk curler 200 can be flipped forward and the strength of the chalk curler 200 being closely adhered to the blackboard 10 by the tension spring 120. Electric blackboard eraser characterized in that. The method of claim 1, The discharge board 310 of the dust collecting duct 300, the electric blackboard eraser, characterized in that provided with a purifying means (350). The method of claim 4, wherein One side of the outlet 310 of the dust collecting duct 300 is coupled to the lid 331 which is opened and closed by pressure to allow direct discharge when the outlet 310 connected to the purifying means 350 is blocked or does not have a purification function. Electric blackboard eraser characterized in that it further comprises an auxiliary outlet (330).

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