KR20100112516A - Black-board erasing implement - Google Patents

Abstract

PURPOSE: A blackboard eraser is provided to be comprised of natural leather which is external member and floor member of blackboard eraser erasing chalk mark on the blackboard, thereby maximizing the adsorptive power. CONSTITUTION: A blackboard eraser includes a blackboard eraser, a blackboard cleaner. The blackboard eraser includes a supporting plate(100) and a bottom member(400) of natural leather which friction with the blackboard by being stalled to a supporting plate. The bottom member exposes an inner skin which has a nap. The blackboard cleaner comprises a combing member which attaches and detaches to the blackboard. The blackboard cleaner make sure that blackboard is settled. The blackboard cleaner forms a plurality of projection to be fractioned with the bottom member of blackboard and comprises a dusting member which a through-hole is formed between projections.

Description

Blackboard erasing implement

The present invention relates to a blackboard erasing tool, and more particularly, to a blackboard erasing tool comprising a blackboard eraser for easily and neatly erasing chalk marks on a blackboard and a blackboard eraser cleaner for easily removing chalk powder of the blackboard eraser. .

In general, schools or academies teach students by writing on the board important information or other lessons they need.

At this time, the description of the blackboard is usually made of chalk made of carbonate.

At this time, after the class is finished using the board eraser, erase the contents written on the board to prepare for the next class.

At this time, with reference to the accompanying Figure 1 with respect to the conventional blackboard eraser used to erase the blackboard as follows.

As shown in FIG. 1, the board eraser includes an eraser board 1 made of a substantially palm-sized rectangle, an outer skin member 2 attached to the bottom surface of the eraser board 1, and in contact with the board. It consists of a handle (3) fixed to the upper surface of the eraser plate (1).

At this time, the inside of the shell member 2 is filled with a cushion member 4, such as cotton, the shell member 2 is fixed to the bottom edge of the eraser plate (1).

At this time, the outer shell member (2) is made of a convex shape by the cushion member (4) filled therein, the material is made of a corduroy material commonly called goldenden.

However, the above-described conventional blackboard eraser has the following problems.

First, since the material of the outer shell member 2 is goldenden, there is a problem that the adsorption force to the chalk powder falls.

Accordingly, in order to clean the board, the board eraser had to be rubbed on the board several times, and in the process, a lot of chalk powder was thrown out.

In addition, there was a problem that bad powder impact on the health of teachers and students.

Second, since the outer shell member 2 is convex by the cushion member 4 filled therein, there is a problem that the cross section of the outer shell member touching the blackboard is small.

In other words, it was difficult to erase a lot of chalk marks on the board at once.

Third, in the process of brushing out the chalk powder adsorbed on the blackboard eraser, there was a very uncomfortable problem.

In order to shake out the chalk powder of the blackboard eraser, the classroom window was opened, the direction of the wind was checked, and the two blackboard erasers were bumped against each other, or a separate hairy tool was used to tap the outer shell member (2) of the blackboard eraser.

In addition, as mentioned above, since the adsorption force to the chalk powder is weak, the hassle of having to shake off the chalk powder frequently of the blackboard eraser has occurred.

Fourth, because of the rigidity of the material of the outer shell member 2 has to be replaced frequently, there is a problem of low economic efficiency.

That is, since a frequent impact is applied to the outer shell member 2 in the process of shaking off the chalk dust of the blackboard eraser, the outer shell member 2 is damaged and the cushion member 4 is exposed to the outside.

The present invention has been made to solve the above problems, the object of the present invention is to maximize the adsorption power to the chalk powder by using the material of natural leather, and to erase the blackboard to make the tool easy to clean and clean the chalk powder It is intended to provide.

To this end, a support plate; a bottom member of natural leather which is installed on the support plate to be rubbed on the blackboard, including the blackboard member to expose the lint formed lint, and a coupling member detachable from the blackboard, The blackboard eraser cleaner is configured to include a blackboard eraser, and the blackboard eraser cleaner includes a plurality of protrusions formed to friction with the bottom member of the blackboard eraser, and a hair removal member having a through-hole formed between the protrusions. Provide tools.

At this time, the handle is further coupled to the upper portion of the support plate, one of the support plate and the handle, the fitting hole is formed, the other is preferably formed a fitting protrusion coupled to the fitting hole.

In addition, a coupling groove corresponding to the bottom member is formed inside the support plate, and the bottom member is preferably fixed to the coupling groove by a non-toxic bond.

In addition, a cushion member is further interposed between the support plate and the bottom member, and an outer skin member is installed on the outer side of the support plate and the cushion member to shield the cushion member, and the material of the outer skin member is made of natural leather. It is preferable to install so that the endothelium is exposed.

The blackboard eraser cleaner may further include: an upper pedestal including an outer frame and a plurality of support frames constituting a lower portion of the outer frame and on which a hair member is seated; a lower pedestal disposed below the upper pedestal; Is disposed, the waste collection drawer that is received through the through hole of the hair member is collected: may be configured, including an upper pedestal to form a seating groove in which the hair is seated; the upper pedestal is coupled to the upper Lower portion; Extension portion extending downward of the lower pedestal; Spacing adjuster for adjusting the distance with the lower pedestal while lifting along the extension; Coupling member is coupled to both ends of the spacing adjuster, provided for coupling with the blackboard It may be configured to include:

At this time, it is preferable that one of the gap adjusting portion and the extension portion is formed with a long hole in the height direction, the other is provided with a bolt and nut installed to be elevated along the long hole.

In addition, the coupling member, it is preferable to include a screw member screwed to both ends of the gap adjusting portion, and a pressing member provided on the upper end of the screw member.

In addition, the shape of the through-hole formed in the hair member is formed in a continuous polygon, the projection is preferably formed to protrude upward from the upper surface of the polygon.

According to the blackboard eraser according to the present invention has the following effects.

First, the material of the outer shell member and the bottom member of the blackboard eraser to erase the chalk marks written on the blackboard is made of natural leather, the absorption power can be maximized.

That is, since chalk powder is adsorbed on the lint of densely formed on the inner skin of natural leather, the blackboard eraser made of natural leather has an excellent cleaning effect to erase the blackboard compared to the surface eraser made of cotton (Golden).

Accordingly, since the blackboard eraser does not need to be rubbed on the blackboard several times, the troublesome and hassle of erasing the blackboard can be minimized.

Second, because the material is made of natural leather, it has a long life effect than the cotton material.

That is, since there is no fear of damage due to frequent shocks or friction, it can be used for a long time, it is possible to minimize the economic loss due to the replacement cost.

Accordingly, there is an effect that the economic efficiency is improved.

Third, by maximizing the adsorptive power of the dense lint-free chalk powder on the inner skin of the natural leather, chalk powder does not fly in the process of erasing the blackboard.

Accordingly, the class can be made in a comfortable environment, there is an effect that does not harm the health of teachers and students.

Fourth, when removing the chalk powder adsorbed on the natural leather, it can easily and neatly process the chalk powder by hitting the two blackboard eraser, or by using a blackboard cleaner without using a separate tool.

That is, since the bottom member and the outer shell member to rub out the chalk powder adsorbed on the natural leather by rubbing the hair member, the chalk powder can be removed without flying.

At this time, by removing the waste collection drawer containing the chalk powder dropped from the hair member every predetermined time to process the chalk powder in a predetermined place, it is possible to perform a neat treatment for the chalk powder.

1 is a perspective view showing a conventional blackboard eraser
Figure 2 is an exploded perspective view showing a blackboard eraser from the bottom of the eraser according to a preferred embodiment of the present invention
3 is an exploded perspective view showing a blackboard eraser among eraser tools according to a preferred embodiment of the present invention.
Figure 4 is a side cross-sectional view showing a blackboard eraser, among the eraser according to a preferred embodiment of the present invention
5 is an exploded perspective view showing a blackboard eraser cleaner among eraser tools according to an exemplary embodiment of the present invention.
6 is a rear view showing a blackboard erasing tool according to a preferred embodiment of the present invention.
7 is an exploded perspective view showing a blackboard eraser among eraser tools according to another embodiment of the present invention.
8 is an exploded perspective view showing a blackboard eraser cleaner among eraser tools according to another embodiment of the present invention.
9 is a front view of the blackboard eraser cleaner of the blackboard eraser according to another embodiment of the present invention.

Hereinafter, the blackboard eraser according to the preferred embodiment of the present invention will be described with reference to FIGS. 2 to 6.

The blackboard eraser consists of a blackboard eraser and a blackboard eraser cleaner.

First, the blackboard eraser will be described with reference to FIGS. 2 to 4.

The blackboard eraser serves to erase the contents written in chalk on the blackboard, and includes a support plate 100, a cushion member 200, an outer shell member 300, and a bottom member 400.

The support plate 100 constitutes a lower shape of the blackboard eraser, and is preferably a synthetic resin that maintains a flat state.

This is to efficiently clean the board by making the cross-sectional area of the board as wide as possible.

At this time, the support plate 100 is formed with a plurality of fitting projections (110).

The fitting protrusion 110 is to be coupled to the handle to be described later.

On the other hand, the shape of the support plate 100 may be provided in various ways, in the present specification it is made of an oval shape for convenience.

Next, the cushion member 200 has a buffer function when the blackboard eraser contacts the blackboard, and is disposed below the support plate 100.

At this time, the cushion member 200 is preferably a sponge, it has a constant thickness.

In addition, the cushion member 200 is formed in a form corresponding to the support plate 100.

Next, the envelope member 300 constitutes a lower circumference of the blackboard eraser, and is provided to surround a portion of the upper surface of the support plate 100 and the side surface of the cushion member 200.

At this time, the outer cover member 300 serves to prevent the cushion member 200 from being exposed to the outside by covering the cushion member 200, but also serves to erase chalk marks in addition to the bottom member 400 to be described later. .

In other words, it is a part used when erasing narrow blackboard marks.

Accordingly, the material of the shell member 300 is preferably made of natural leather.

This is to improve the rigidity of the shell member 300, and to erase the chalk marks cleanly and easily.

A detailed description thereof will be given below when describing the bottom member 400.

On the other hand, the outer shell member 300 is fixed to the upper edge of the support plate 100, as described above, then bent toward the side of the cushion member 200 to shield the cushion member 200.

At this time, the envelope member 300 may be sewn and fixed on the support plate 100, it may be fixed by an adhesive or the like.

On the other hand, it is not preferable that the thickness of the shell member 300 is provided in an excessively thick state. This is because the processing operation is not smoothly made in the process of the outer shell member 300 is bent from the support plate 100 and processed.

For this reason, the thickness of the shell member 300 is preferably approximately 0.6mm.

Next, the bottom member 400 serves to erase the chalk marks in contact with the blackboard, and is disposed on the bottom of the cushion member 200.

At this time, the bottom member 400 is formed in a form corresponding to the bottom surface of the cushion member 200, it is fixed to the outer shell member (300).

At this time, since the shape of the cushion member 200 provides a flat bottom, the bottom member 400 also has a flat shape corresponding to the bottom of the cushion member 200.

At this time, the material of the bottom member 400 is made of natural leather.

At this time, the natural leather, skins of slaughtered animals, such as cows, sheep, etc. to remove the grease, a certain thickness of the leather comes out, when cutting the leather is divided into skin and skin layer without skin layer attached. .

At this time, the process is dyed the outer leather is natural leather.

At this time, the finished product of the natural leather is usually exposed to the surface (hereinafter, referred to as the 'shell' for convenience) to provide a beauty, and the inner surface of the natural leather (hereinafter referred to as 'the inner skin' for convenience) is formed with fluff.

On the other hand, the bottom member 400 so that the lining is formed of the lining is exposed to the outside.

This is to maximize the adsorption force on the chalk powder.

That is, due to the dense lint formed on the inner skin of natural leather, the adsorption force to the chalk powder can be maximized.

Compared with the conventional gold eraser made of the golden plate material, the external structure of the golden plate material is made of bone and acid, as shown in FIG. 1, and thus the absorption force on the chalk powder is not maximized.

Accordingly, the blackboard eraser must be moved several times, and the chalk marks remain even after rubbing the blackboard several times.

However, the tissue form of natural leather according to the present invention, as can be seen through Figures 2 and 3, because the dense lint is formed, all the chalk powder is adsorbed to the fluff.

Accordingly, even if the board is rubbed only once, chalk marks are not left at the place where the bottom member 400 passes.

On the other hand, the thickness of the bottom member 400 is preferably formed thicker than the thickness of the shell member (300).

This is because the bottom member 400 is often in contact with the blackboard as compared to the outer skin member 300, to increase the rigidity.

Accordingly, the thickness of the bottom member 400 is preferably about 1.2mm.

At this time, although the bottom member 400 and the outer shell member 300 may be integrally formed, the process of bending the bottom member 400 may be difficult due to the thickness of the bottom member 400.

Accordingly, the shell member 300 and the bottom member 400 is preferably provided as an individual by varying the thickness.

On the other hand, the handle 500 is installed on the upper portion of the support plate 100.

The handle 500 is for facilitating the grip on the blackboard eraser, it is preferably a synthetic resin.

In this case, the handle 500 includes a body 510 corresponding to the size and shape of the support plate 100 and a grip part 520 formed on the body 510.

At this time, a fitting hole 511 in which the fitting protrusion 110 of the support plate 100 is forcibly fitted is formed on the bottom of the body 510.

So far, the construction of the blackboard eraser has been described.

Hereinafter, the blackboard eraser cleaner will be described with reference to FIG. 5.

The blackboard eraser cleaner serves to remove chalk powder adsorbed on the natural leather of the blackboard eraser, and includes an upper pedestal 600, a lower pedestal 700, a hair member 800, and a waste collection drawer 900. It is configured by.

The upper pedestal 600 constitutes a frame for mounting the blackboard eraser, and includes an outer frame 610 and a support frame 620.

The outer frame 610 forms a circumference of the upper pedestal 600, preferably made of a square shape to surround the blackboard eraser.

In addition, the support frame 620 is provided so that the blackboard eraser may be seated, and is installed below the outer frame 610.

At this time, the support frame 620 is provided in plurality, preferably welded to the lower end of the outer frame 610.

By such a configuration, spaced spaces are formed between the support frames 620.

Next, the lower pedestal 700 is where the waste collection drawer 900 is disposed, and is disposed below the upper pedestal 60.

The lower pedestal 700 is also made similar to the upper pedestal 600, the outer frame 710 constituting the circumference, and the waste collection drawer 900 is composed of a plurality of support frame 720 for seating. .

Next, the hair member 800 serves to rub the natural leather of the blackboard eraser, so that the chalk powder adsorbed on the natural leather falls.

At this time, the hair member 800 is preferably made of a relatively hard hard rubber material, and includes a plurality of protrusions 810.

At this time, the through hole is formed between the plurality of protrusions 810 so that the chalk powder falling from the natural leather can fall.

At this time, the shape of the protrusion 810 is not limited, as long as the friction with natural leather can be made smoothly.

That is, as shown in Figure 5, may be made of a continuous wave pattern, which is similar to the form of a steel plate for grinding vegetables.

Next, the waste collection drawer 900 serves to collect chalk powder and foreign matters dropped by the hairy member 800 and is disposed on the support frame 720 of the lower pedestal 700.

The waste collection drawer 900 is preferably made of synthetic resin, and has a receiving groove 910 having a predetermined space.

On the other hand, the coupling member 10 is installed on one side of the upper pedestal 600 and the lower pedestal 700.

The coupling member 10 serves to detach the blackboard eraser cleaner on the blackboard, and the fixing frame 11 fixed to one side of the upper pedestal 600 and the lower pedestal 700, the pressing member 12, the screw And a member 13.

At this time, the fixed frame 11 is fitted to the chalk base on which the chalk of the blackboard is placed, the pressing member 12 is formed on the upper end of the screw member (13).

By this configuration, the pressing member 12 is disposed on the bottom of the chalk support, and the compression member 12 presses the bottom of the chalk support by the rotation of the screw member 13.

Accordingly, the blackboard eraser cleaner can be coupled to the chalk stand of the blackboard.

Hereinafter, the combination and operation of the blackboard eraser consisting of the blackboard eraser and the blackboard eraser cleaner described above will be described.

The blackboard eraser is provided with a handle 500 coupled to the support plate 100, and the blackboard eraser cleaner has a hair member 800 disposed on the upper pedestal 600 and a waste drawer 900 disposed on the lower pedestal 700. It is provided.

At this time, the blackboard eraser cleaner is coupled to the chalk support of the blackboard, the blackboard eraser is provided in a state seated on the hair member (800).

Thereafter, in order to erase the chalk marks written on the blackboard, the chalk marks are rubbed using the bottom member 400 of the blackboard eraser.

At this time, since the chalk powder is adsorbed by the fluff formed on the bottom member 400, the place passed by the bottom member is cleaned.

As mentioned above, since lint is densely formed on the inner skin of natural leather, the adsorption force to chalk powder can be maximized.

Accordingly, even if the blackboard eraser is not moved several times, the chalk marks can be cleaned cleanly.

Then, after several times, in order to clean the bottom member 400 of the blackboard eraser adsorbed with chalk powder, the bottom member 400 is rubbed against the hair member 800 of the blackboard eraser cleaner.

At this time, the chalk powder and some lint adsorbed to the fluff of the bottom member 400 is received downward in the receiving groove 910 of the waste collection drawer (900).

Thereafter, the waste collection drawer 900 is removed from the lower pedestal 700, and the waste contained in the accommodation groove 910 is discarded in the trash.

Meanwhile, another blackboard erasing tool may be provided to solve the above problem.

This is presented as another embodiment of the present invention, and will be described with reference to FIGS. 7 to 9.

Prior to the description, the same reference numerals are used for the same names as the preferred embodiments.

7 is an exploded view of the blackboard eraser and includes a support plate 100 and a bottom member 400.

At this time, the support plate 100 constitutes an upper portion of the blackboard eraser, and a coupling groove 120 having a predetermined space is formed inside thereof.

The coupling groove 120 is a portion in which the bottom member 400 is accommodated, and the size of the coupling groove 120 is preferably a size corresponding to the bottom member 400.

Then, the bottom member 400 is a portion to erase the chalk marks written on the blackboard, it is made to expose the fluff formed on the inner skin of the natural leather.

In this case, the bottom member 400 may be integrally formed without distinguishing the outer skin member 300 as shown in FIG.

Of course, it is not limited to this, but is intended to show another example.

On the other hand, the inside of the bottom member 400 is preferably provided with a cushion member 200 as in the preferred embodiment.

In addition, although not shown, it is preferable that a gripping strap is further provided on the upper surface of the support plate 100 to facilitate gripping of the blackboard eraser.

8 and 9 illustrate a blackboard eraser cleaner according to another embodiment of the present invention. FIG. 8 is an exploded perspective view and FIG. 9 is a front view of a coupled state.

As illustrated in FIG. 8, the blackboard eraser cleaner includes a hair member 800, an upper pedestal 600, a lower pedestal 700, an extension 730, a space adjusting part 740, and a coupling member. It comprises a (10).

The hair member 800 is a portion where the bottom member 400 is rubbed to remove chalk of the blackboard eraser, and forms a plurality of protrusions 810 and a plurality of through holes 820.

The protrusion 810 is a portion directly rubbed against the bottom member 400, and is formed over the entire portion of the hair member 800.

In addition, the through hole 820 is rubbed with the protrusion 810 to be separated from the bottom member 400, such as chalk dust and lint is accommodated, a plurality of provided after each divided.

As the through-hole 820 is partitioned as described above, it is possible to minimize the scattering of chalk powder and fluff.

At this time, the shape of the through hole 820 is preferably made of a polygon, more preferably made of a hexagonal shape.

Of course, the shape of the through hole 820 is not limited.

On the other hand, the protrusion 810 is formed on the line of the polygonal shape constituting the through hole 820, is formed at each vertex portion.

Next, the upper pedestal 600 is a portion where the hair member 800 is seated, and forms a seating groove 630 corresponding to the size of the hair member 800.

In addition, the upper pedestal 600 is preferably formed to be inclined from one side to the other side.

This is to facilitate the friction process of the blackboard eraser.

Next, the lower pedestal 700 serves to support the upper pedestal 600, and forms a removable groove 750 in which the upper pedestal 600 is accommodated.

That is, since the upper pedestal 600 can be easily separated from each other as a structure in which the upper pedestal 600 is seated in the detachable groove 750 of the lower pedestal 700, the powder powder contained in the upper pedestal 600 can be easily processed. .

Next, the extension 730 serves to form a space under the lower pedestal 700 for coupling with the blackboard.

To this end, the extension 730 is formed extending downward from the lower pedestal (700).

Next, the gap adjusting part 740 serves to adjust the size of the space formed below the lower support 700, it is made to be elevated along the extension 730.

At this time, the gap adjusting portion 740 is in close contact with the extension portion 730, is formed by bending toward the lower portion of the lower support from the close extension portion 730.

On the other hand, the long hole 741 is formed in any one of the gap adjusting portion 740 and the extension portion 730.

This is to adjust the size of the space formed below the lower pedestal 700, to facilitate the coupling to the blackboard.

In more detail in this regard, the area where the blackboard eraser cleaner is coupled to the blackboard is a chalk stand (not shown) where the chalk is normally placed.

At this time, since the thickness of the chalk support may vary for each provided blackboard, it is to adjust the thickness of the chalk support.

Of course, the blackboard eraser is not necessarily coupled to the chalk base, but may be coupled to other structures, and may be adjusted to the thickness of the structure.

In the present specification, for convenience of description, the long holes 741 are formed on both sides of the gap adjusting unit 740, for example.

As the long hole 741 is formed in the gap adjusting unit 740 as described above, the extension part 730 corresponding thereto is provided with a bolt B and a nut (not shown).

That is, the bolt B is fastened to the nut (not shown) through the long hole 741, thereby fixing the position of the gap adjusting part 740.

Next, the coupling member 10 serves to couple the blackboard eraser cleaner to the chalk pedestal or any structure of the blackboard, it is installed in the bent portion of the gap adjusting portion 740.

At this time, the coupling member 10 is the same as the preferred embodiment of the present invention, detailed description thereof will be omitted.

Hereinafter, the combination and operation of the blackboard eraser according to another embodiment of the present invention having the above configuration will be described.

A chalkboard eraser having a bottom member 400 fixed thereto by a non-toxic bond is provided in the inner coupling groove 120 of the support plate 100.

Then combine the board eraser cleaner with the board.

To this end, the blackboard eraser cleaner is disposed such that the chalk base of the blackboard is disposed in a space formed below the lower base 700.

Thereafter, the screw member 13 of the coupling member 10 is rotated so that the pressing member 12 comes into close contact with the bottom surface of the chalk pedestal.

Accordingly, the blackboard eraser cleaner is combined with the blackboard.

In this state, the blackboard eraser cleaner is coupled, the blackboard eraser is provided seated on the hair member (800).

On the other hand, in order to shake off the chalk powder adsorbed on the blackboard eraser rubbing the bottom member 400 of the blackboard eraser to the hair member (800).

At this time, the chalk powder adsorbed on the bottom member 400 is dropped by the protrusion 810 of the hair member 800, the fallen chalk powder is seated groove 630 of the upper pedestal 600 through the partitioned through hole 820, respectively. Is accommodated).

At this time, since the plurality of through holes 820 are each partitioned, the scattering of chalk powder can be minimized.

On the other hand, when the size of the space formed below the lower pedestal 700 is smaller than the thickness of the chalk base or the thickness of the structure, the space can be increased by using the gap adjusting unit 740.

To this end, loosen the bolt (B) to lower the gap adjusting portion 740.

At this time, the interval adjusting unit 740 is lowered while the long hole 741 is guided to the bolt (B), it is understood that the space can be further secured by the length of the long hole (741).

As described so far, the material of the outer cover member 300 and the bottom member 400 constituting the blackboard eraser is formed of natural leather, the absorption force to the chalk powder can be maximized due to the numerous lint formed on the natural leather.

Accordingly, in the process of cleaning the chalk marks, not only the chalk powder is blown, but also has a technical feature to erase the chalk marks clean at once.

In addition, by providing a blackboard eraser cleaner including a hair member 800, there is a technical feature to make the process of removing the chalk powder from the bottom member 400 of the blackboard eraser easy and clean.

10: coupling member 11: fixed frame
12: pressing member 13: screw member
100: support plate 110: fitting protrusion
120: coupling groove 200: cushion member
300: outer member 400: bottom member
500: handle 510: body
520: grip portion 600: upper pedestal
610,710: Outer frame 620,720: Support frame
630: seating groove 700: lower support
730: extension portion 740: spacing control unit
741: long hole 750: removable groove
800: hair member 810: protrusion
820: through 900 900: waste collection drawer
910: Accepting Home

Claims (9)

Support plate;
A bottom member of natural leather installed on the support plate and rubbing against the board; wherein the bottom member includes a blackboard eraser to expose the lint-forming lint;
It includes a coupling member detachable to the blackboard, and comprises a blackboard eraser cleaner for mounting the blackboard eraser,
The blackboard eraser cleaner,
A plurality of protrusions are formed to friction with the bottom member of the blackboard eraser, the blackboard eraser comprising a hair member formed with a hole between the projections. The method of claim 1,
A handle is further coupled to the upper portion of the support plate,
The support plate and the handle, any one of the insertion hole is formed, the other one of the blackboard eraser, characterized in that the fitting projection is coupled to the fitting hole is formed. The method of claim 1,
A coupling groove corresponding to the bottom member is formed inside the support plate, and the bottom member is fixed to the coupling groove by a non-toxic bond. The method according to any one of claims 1 to 3,
A cushion member is further interposed between the support plate and the bottom member, and an outer cover member is installed outside the support plate and the cushion member to shield the cushion member.
The material of the outer shell member is made of natural leather, the eraser board characterized in that the lint is formed so that the inner skin is exposed. The method according to any one of claims 1 to 3,
The blackboard eraser cleaner,
An upper pedestal comprising an outer frame and a plurality of support frames constituting a lower portion of the outer frame and on which a hair member is seated;
A lower pedestal disposed below the upper pedestal;
Disposed on the lower pedestal, the blackboard eraser comprising: a waste collection drawer in which chalk powder is dropped through the through hole of the hairy member; The method according to any one of claims 1 to 3,
The blackboard eraser cleaner,
An upper pedestal for forming a seating groove in which a hair member is seated;
A lower pedestal coupled to the upper pedestal;
An extension part extending downward of the lower pedestal;
A gap adjusting part for adjusting a distance from the lower pedestal while being lifted along the extension part;
And a coupling member coupled to both ends of the gap adjusting part and provided for coupling with the blackboard. The method of claim 6,
Longitudinal hole is formed in one of the gap adjusting portion and the extension portion, and the other board is provided with a bolt and nut installed to be elevated along the long hole. The method of claim 6,
The coupling member,
Blackboard eraser comprising a screw member screwed to both ends of the gap adjusting portion, and a pressing member installed on the upper end of the screw member. The method according to any one of claims 1 to 3,
The through hole formed in the hair member is formed of a continuous polygon, the projection is characterized in that the blackboard is formed so as to protrude upward from the upper surface of the polygon.

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