Chalk eraser with filter

Abstract

The invention discloses a chalk eraser with a filter. One or more long-strip-shaped erasing strips are arranged on the outer wall of a bottom plate of a shell. The shell is hollow, and a plurality of air suction holes communicating with an inner hole of the shell are formed in the bottom plate around the erasing strips. A cylindrical hollow equipment bin is arranged in the shell. The friction force generated through leftward and rightward movement of the chalk eraser on the blackboard during blackboard erasing drives a power wheel to rotate, the power wheel then transmits power to a flywheel, the flywheel drives fan blades to rotate, and therefore the dust suction function is achieved. Airflow blown out of the shell is guided through a skirt edge on the edge of the bottom plate, then an airflow curtain is formed on the periphery of the chalk eraser, and the chalk dust is prevented from flying outward.

Description

technical field [0001] The invention relates to a chalk eraser with a filter capable of automatically sucking chalk dust used by teachers in the teaching process, which belongs to the optimization technology of the chalk eraser. Background technique [0002] Teachers often need to write with chalk on the blackboard during the teaching process. After writing, they need to use a chalk eraser to erase the chalk on the blackboard. During the process of wiping the blackboard, the chalk dust from the chalk eraser often flies around and pollutes the surrounding area. environment, increase the difficulty of cleaning, and even if the person wiping the blackboard tries to hold his breath to prevent from inhaling chalk dust, he will still inevitably inhale some chalk dust, which will give health risks. [0003] Therefore, need to find a kind of chalk eraser with filter that can avoid chalk dust flying everywhere. Contents of the invention [0004] The object of the present invention...

AI Technical Summary

Problems solved by technology

[0002] Teachers often need to write with chalk on the blackboard during the teaching process. After writing, they need to use a chalk eraser to erase the chalk on the blackboard. During the process of wiping the blackboard, the chalk dust from the chalk eraser often flies around and pollutes the surrounding area. environment, increasing the difficulty of cleaning, and even if the person wiping the blackboard tries to hold his breath to prevent inhalation of chalk dust during the wiping process, he will still inevitably inhale some chalk dust, causing health risks

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