KR102401329B1 - Suction type blackboard eraser - Google Patents

Abstract

The present invention relates to a blackboard eraser for erasing chalk on a blackboard. A suction port is provided on the outer edge of the eraser, and the suction port sucks chalk powder blown when erasing chalk with the eraser by the operation of a motor and a fan provided inside the blackboard eraser. It is about a suction type blackboard eraser that does. More specifically, in order to solve the above-described technical problem, the suction type blackboard eraser according to the present invention is a base that is a rectangular frame with one open side and is adhered to the open side of the base, and the sponge is wrapped with a cloth. A suction port is formed between the eraser and the inner edge of the base and the outer edge of the eraser, and a suction part having a suction fan and a suction motor on the inner surface of the base, and a switch for controlling the suction motor on the outer surface of the base and a storage unit for storing the suctioned chalk powder on the back side of the suction fan.

Description

Suction type blackboard eraser {SUCTION TYPE BLACKBOARD ERASER}

The present invention relates to a blackboard eraser for erasing chalk on a blackboard. A suction port is provided on the outer edge of the eraser, and the suction port sucks chalk powder blown when erasing chalk with the eraser by the operation of a motor and a fan provided inside the blackboard eraser. It is about a suction type blackboard eraser that does.

In general, a blackboard eraser is a tool for erasing characters written in chalk on a blackboard, has a rectangular shape, and the front side is made of corrugated cloth covering a sponge, and is used to erase the blackboard, and the back side is designed to be gripped by the user A gripper is provided, and sometimes a belt similar to a belt is attached.

In addition, there is a chalkboard eraser cleaner to dispose of the chalk powder remaining in the blackboard eraser. Remove the chalk powder by brushing the eraser against the wall or two blackboard erasers to be cleaned.

At this time, there are many schools equipped with blackboard eraser cleaners because the flying chalk powder enters the respiratory tract and can lead to respiratory diseases when accumulated. Although more and more schools are using whiteboards instead of whiteboards, the reality is that there are still more schools using blackboards.

To solve the above problem, a blackboard eraser that erases the blackboard using water was developed and mass-produced, but after erasing the blackboard, the remaining water on the blackboard had to be wiped off and the cloth containing water had to be washed periodically. ,

As a related prior art, Publication No. 10-2017-0067286 discloses a chalkboard eraser in which a spray and an inlet connected to a water bottle are provided in the blackboard eraser, and when a pressure part is pressed on the outside of the spray, water is ejected from the internal ejection part. Not being able to solve the inconvenience caused is the same.

Accordingly, there is a need for a chalkboard eraser capable of preventing the chalk powder spreading in the air from reaching the user when erasing the blackboard.

Prior literature: Korean Patent Publication No. 10-2017-0067286 (published on June 16, 2017)

In order to solve the above-mentioned problems in the prior art, the present invention sucks the chalk powder that is blown out when the chalk written on the blackboard is erased with a blackboard eraser by the operation of the motor and the fan through the suction port provided on the outer edge of the eraser, so that the chalk powder is used by the user. An object of the present invention is to provide a suction type blackboard eraser that prevents it from entering the nasal cavity.

In order to solve the above technical problem, the suction type blackboard eraser according to the present invention is a base which is a rectangular frame with one open side and is adhered to the open side of the base. A suction port is formed between the inner edge and the outer edge of the eraser, a suction part having a suction fan and a suction motor is provided on the inner surface of the base, and a switch for controlling the suction motor is provided on the outer surface of the base, the suction fan It is characterized in that it includes a storage unit for storing the inhaled chalk powder on the back side of the.

In addition, the storage unit preferably includes a dust bin installed on the rear surface of the suction fan, an air outlet for discharging the sucked air to the outside, and a filter attached to the air outlet to prevent chalk powder from coming out through the air outlet.

In addition, it is preferable that the base includes a gripping part that is knurled on the outer edge surface for a user to grip easily.

According to the present invention, different from the prior art, a suction fan and a suction motor are provided inside the blackboard eraser base, and the chalk powder is sucked into the space between the eraser and the base, and the chalk powder spreads into the air when the blackboard is erased using the blackboard eraser. It has the effect of preventing the penetration of chalk powder into the user's nasal passages by inhaling.

In addition, in discharging the air containing the chalk powder flowing into the suction fan, a filter is provided between the air discharge port and the suction port to have the effect of discharging only the air excluding the chalk powder through the filter.

1 is a view showing a suction type blackboard eraser according to the present invention.
2 is a view showing the internal configuration of a suction type blackboard eraser according to the present invention.
3 is a view showing another embodiment of the suction type blackboard eraser according to the present invention.
4 is a view showing the grip portion of the suction type blackboard eraser according to the present invention.

Hereinafter, in addition to the above object, other objects and features of the present invention will become apparent through the description of the embodiments with reference to the accompanying drawings, and unless otherwise defined, all terms used herein, including technical or scientific terms, are It has the same meaning as commonly understood by those of ordinary skill in the art to which the invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, the suction type blackboard eraser according to the present invention will be described in detail with reference to the accompanying drawings. Before the description, the chalk in the present invention is made by aggregating powder of calcium carbonate or gypsum, and when scratched on a plate with a rough surface, the powder of calcium carbonate or gypsum is buried on the surface to leave a mark, and the surface on which the chalk is written is A rough board is defined as a blackboard.

First, as shown in FIG. 1, the suction type blackboard eraser according to the present invention includes a base 100, which is a rectangular frame with one open side, and an eraser 200 that is attached to the open inner surface of the base 100 and A suction unit 300 for sucking chalk powder using a fan and a motor through a suction port formed between the outer edge of the eraser 200 and the inside edge of the base 100, and a storage unit for collecting the suctioned chalk powder ( 400) is included.

Referring to Figure 2 for a more detailed description,

2 is a view showing the internal configuration of the suction type blackboard eraser according to the present invention.

The eraser 200 is adhered to the inside of the open side of the base 100, and the outer material 210 is made of corduroy. In general, it is widely used as an eraser material for blackboard erasers, and a sponge 220 is included in the corduroy so that all areas of the eraser can be in contact with the blackboard.

The suction unit 300 includes a suction port 310 that is a space formed between the inner edge of the base 100 and the outer edge of the eraser 200, the suction fan 320 positioned inside the base, and the Including a suction motor 330 for supplying power to the suction fan 320,

Preferably, a switch 110 is provided on the outer surface of the base 100 in order to control the operation of the suction motor 330 .

In the storage unit 400 , a dust container 410 , which is a frame having an open surface, is connected to the upper surface of the base 100 , and serves to load air including the suctioned chalk powder into the dust container 410 .

At this time, each coupling portion is provided for connection between the base 100 and the storage unit 400 . Referring to FIG. 3 , the first protrusion that is a protrusion having a long groove such as a rail on the upper surface of the base 100 on the inner surface At the lower end of the coupling part 130 and the storage part 400, a second coupling part 411 which is a protrusion having a long groove such as a rail on the outer surface to correspond to the first coupling part 130 is provided, and due to the long groove, The formed 'C'-shaped coupling parts are coupled to each other as shown in FIG. 2 .

In addition, it is preferable that the first coupling part 130 and the second coupling part 411 apply an interference fit tolerance, not a loose fit, to prevent the coupling part from loosening and separating when erasing the blackboard.

3 is a view showing another embodiment of the suction type blackboard eraser according to the present invention.

The storage unit 400 includes a dust container 410 having one surface open on the rear surface of the suction fan 420 , and an air outlet for discharging air sucked by the suction fan 420 on left and right sides of the dust container. and a filter 430 attached to the air outlet 420 so that chalk powder is not discharged to the 420 and the air outlet 420 .

Referring to FIG. 3 , the suction motor 330 and the suction fan 320 operate the switch 110 to suck the chalk powder and air into the air containing the chalk powder, and the suction port 310 sucks the chalk powder. and the air passes through the suction fan 320 and enters the dust container 410, and is discharged to the air outlet 420. At this time, the filter 430 is inserted through the air outlet 420 to prevent chalk powder from being discharged to the air outlet 420. ) to discharge only air excluding chalk powder.

Preferably, the suction type blackboard eraser is used to erase chalk written on the blackboard.

4 is a view showing the grip portion of the suction type blackboard eraser according to the present invention.

The base 100 includes a gripping part 120 that is processed to be easily gripped by a user on the outer edge surface, and the processing is a lattice of several comb-tooth patterns, such as knurling processing to prevent slippage in gripping mechanical parts. It is preferable to be formed in a shape.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims to be described later, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

100: base
110: switch
120: grip part
200: eraser
210: external material
220: sponge
300: suction unit
310: intake
320: suction fan
330: suction motor
400: storage
410: dust bin
420: air outlet
430: filter

Claims (3)

Base 100, which is a rectangular frame with one side open;
an eraser 200 attached to the open surface of the base 100 and having a sponge wrapped with a cloth;
A suction port 310 is formed between the inner edge of the base 100 and the outer edge of the eraser 200 , and a suction fan 320 and a suction motor 330 are provided on the inner surface of the base 100 . suction unit 300;
A switch 110 for controlling the suction motor 330 is provided on the outer surface of the base 100, and a storage unit 400 for storing the suctioned chalk powder on the back side of the suction fan 320 is included,

The storage unit 400 is attached to the dust bin 410 installed on the rear side of the suction fan, the air outlet 420 for discharging the sucked air, and the air outlet 420 to prevent chalk powder from coming out. Including a filter 430 that is,
The base 100 has a first coupling part 130 , which is a protrusion including a long groove, on its upper surface for connection with the storage part 400 , and the first coupling part 130 at the lower end of the dust container 410 . Suction type blackboard eraser, characterized in that it comprises a second coupling portion (411) corresponding to the projection.
delete According to claim 1,
The base (100) is a suction type blackboard eraser, characterized in that it includes a gripping part (120) on the outer edge surface that is knurled to make it easier for a user to grip it.

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