JP2002200889A - Blackboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically collect powder of chalk to a predetermined location by means of a vacuum device. SOLUTION: Powder of chalk falling on a trough 2 of a blackboard is collected to a predetermined location by means of the strong suction force of a vacuum device 8, without scattering the powder to the surroundings thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackboard for preventing chalk powder from scattering and automatically loading the chalk powder into a predetermined place.

[0002]

2. Description of the Related Art In a conventional blackboard, there is no other method except for manually removing chalk powder accumulated in a gutter.

[0003]

SUMMARY OF THE INVENTION Like a conventional blackboard,
If the chalk powder is manually removed, the hand may become dirty, or the chalk powder may stain the surroundings. An object of the present invention is to eliminate the drawbacks of the conventional product and to provide an extremely innovative blackboard which automatically sucks and collects chalk powder at a predetermined position.

[0004]

According to the present invention, as a means for achieving the above object, a blackboard main body 1 and a gutter 2 provided at a lower edge of the main body 1 for receiving chalk powder protruding forward. An inner lid 3 having a plurality of perforations 4 removably mounted on the gutter 2, and a suction hole 6 provided in the gutter 2 and drilled on the upper surface communicating with the perforations 4 of the inner lid 3. State
A pipe-shaped dust collecting member 5 having substantially the same length as the gutter 2 and having an arbitrary shape in cross section, attached to the gutter 2,
A plurality of outer lids 7 each of which independently opens and closes, covering the upper part, and a hose 9 of a vacuum device 8
And the chalk powder in the gutter 2 was sucked.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific structure of the present invention will be described with reference to the drawings. A gutter 2 for receiving chalk powder is provided at the lower edge of a blackboard main body 1, and a plurality of perforations 4 are formed in the gutter 2. The provided inner cover 3 is slidably inserted along the guide groove 11 of the gutter 2.

Next, a pipe-shaped dust collecting member 5 is installed in the gutter 2 and has substantially the same length as the gutter 2 and a cross-sectional shape such as an ellipse, a circle or a square. An arbitrary shape is possible, and a suction hole 6 is provided on the upper surface. The suction hole 6 matches the perforation 4 of the inner lid 3 so that both are communicated.

A hose 9 of a vacuum device 8 is connected to the powder collecting member 5 (the connection of the hose 9 is not limited to one place,
The strong suction force of the vacuum device 8 collects the chalk powder dropped on the inner lid 3 of the gutter 2 from the dust collecting member 5 to a predetermined position. A plurality of divided outer lids 7 that can be opened and closed by hinges and the like are mounted on the gutter 2, and each of the outer lids 7 can be opened and closed independently. 3, the upper cover 3 closes the perforations 4 of the inner cover 3 to prevent air from flowing in. Therefore, for example, when using the left side of the blackboard, the outer cover 3 in the center and the outer cover 3 on the right side should be closed. In this case, the suction force is concentrated on the left side of the gutter 2 to improve the powder collecting effect.
Sleeve plates 10 are provided on both sides of the blackboard body 1 to prevent the chalk powder from scattering on both sides,
A function for dropping on the upper side is provided.
In some cases, air holes are drilled.

[0008]

According to the present invention, when the vacuum device 8 is operated during use of the blackboard, the chalk powder dropped on the inner lid 3 of the gutter 2 is collected by the strong suction force of the vacuum device 8. The powder is automatically collected from the member 5 through the hose 9 to a predetermined location, eliminating the need for manual work for removing the chalk powder in the gutter 2 and preventing the chalk powder from scattering around. The gutter 2 is provided with an outer lid 7 divided into a plurality of parts. By opening and closing the outer lid 7 in accordance with the use location of the blackboard, the dust collecting suction force of the used portion can be enhanced. In this way, hygienic and comfortable use is possible, and an epoch-making blackboard can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a blackboard according to the present invention.

FIG. 2 is a sectional view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blackboard main body 2 Gutter 3 Inner lid 4 Drilling 5 Powder collecting member 6 Suction hole 7 Outer lid 8 Vacuum device 9 Hose

Claims (1)

[Claims] 1. A blackboard main body 1 and a gutter 2 provided on a lower edge of the main body 1 so as to protrude forward from a chalk powder.
And an inner lid 3 having a plurality of perforations 4 detachably mounted on the gutter 2, and a suction hole 6 provided in the gutter 2 and drilled on the upper surface communicating with the perforations 4 of the inner lid 3. A pipe-shaped dust collecting member 5 having a substantially same length as the trough 2 and having an arbitrary shape in cross section, and a plurality of independent members each of which is attached to the trough 2 and covers the inner lid 3. A blackboard comprising an outer lid 7 that opens and closes, and a chalk powder in the gutter 2 is sucked by connecting a hose 9 of a vacuum device 8 to the powder collecting member 5.