JPH10129196A - Eraser for blackboard with powder remover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce powder readhering to a blackboard and to keep superior in blackness of the blackboard and to prevent the dropped powder from scattering by determining a mechanism that a corduroy cloth rotates respectively corresponding to a movement from right to left for erasing a writing on a blackboard. SOLUTION: Two sets and totally 4 rollers 1 having a diameter of 20mm and a length of 120mm are mounted rotatably on a mount 4. A corduroy cloth 2 is mounted respectively to each set so as to rotate in a caterpillar style. The corduroy cloth of each set is an erasing cloth 2. A feel is respectively mounted to one-way rotate relatively to the roller 1 of each erasing cloth 2. When an eraser is pushed to the blackboard to move from right to left to erase a writing on the blackboard, at a side that the erasing cloth 2 stopped moving conventionally erases the writing on the blackboard. On the other hand, at another side that the erasing cloth 2 rotating, the powder of chalk of the erasing cloth 2 is swept to collect in a powder receiver by working of a brush 3. The collected powders are disposed by removing the powder receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackboard eraser for erasing writings on a blackboard.

[0002]

2. Description of the Related Art A conventional blackboard eraser employs a system in which powder is accumulated in a weaving groove of a corten cloth and is occasionally wiped off. It was very ugly because the spots were obtrusive and weak. The powder was easy to scatter.

[0003]

When the black ink powder is erased, it often adheres to the blackboard and causes a faint strip of stripes or an uneven pattern, which often reduces the blackness of the blackboard. . In addition, it is thought that there is some scattering of powder and hygiene is also certain or bad. Significantly improve and eliminate these areas.

[0004]

Means for Solving the Problems In order to reduce the possibility that black chalk powder adheres to the blackboard again or scatters, the coulten cloth is fitted into two rollers in a caterpillar system, and two sets of these are arranged vertically and attached to the holder. Thing. Attach the film to each pair of the rollers so that they rotate one way, and rotate the coulten cloth alternately with left and right movements to wipe off the writing on the blackboard. The writing on the chalkboard should be erased normally while the corten cloth is stopped, and while the corten cloth is rotating, the powder will be wiped off by vibrating the brush on the back side. Rollers should be glued with rubber, etc. to prevent slippage of the cloth. The brush vibration uses the vibration of the file claw. Be able to remove the chalkboard by installing a dust pan on the bottom.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is the same as in the related art that the hand is inserted into the backing band 6 of the blackboard eraser and lightly held for wiping. When the moving cloth 2 to be erased is stopped, the writing on the blackboard is erased, and when the cloth 2 for rotating the COR-TEN is rotating, the powder of the cloth 2 for the COR-TEN is removed and accumulated in the powder tray due to the brush 3. Remove the accumulated powder and discard the accumulated powder.

[0006]

EXAMPLE A roller having a straight line length of 20 mm and a length of 120 mm was used.
A total of 4 sets of 2 sets are attached to the holder in a freely rotatable manner. Attach the coulten cloth to each set so as to go around in a caterpillar style. Each set of coal tenn cloth is an eraser cloth. A file is attached to each roller of the eraser to rotate the roller in one direction. If you press the blackboard eraser against the blackboard and move it to the left and right to erase the writing on the blackboard, the one with the eraser stopped will erase the writing on the blackboard as usual, but the one with the eraser rotating By the action of the brush vibrating on the back side, the black ink powder on the eraser cloth is brushed off and accumulates in the powder receiver. Remove the powder receiver and discard the accumulated powder. During use, each of the Corten's erasers attached to the two sets of rollers alternately stops and rotates, so the chalk powder on the eraser is wiped off every wipe and the eraser is always clean Reduce the re-adhesion of chalk powder on the blackboard and keep the blackboard black. Minimize scattering of chalk powder.

[0007]

According to the present invention, the following advantages can be obtained since the use of the above-described structure eliminates the use of coal ten. Since the black cloth is always wiped off from the chorten eraser of the blackboard eraser, the amount of powder that adheres to the blackboard again is small, and the blackness of the blackboard is kept good. The fallen powder accumulates in the powder pan attached to the blackboard eraser, so there is little scattering. Appropriate for eye and air hygiene.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the middle of a blackboard eraser.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller 2 Corten eraser 3 Brush 4 Holder 5 Dustproof cover 6 Upper band

Claims (1)

[Claims] 1. In order to erase the writing on the blackboard, the force at the time of pushing and moving the blackboard eraser is changed to a rotational force, the eraser is circulated, and the powder is brushed down on the back side.