Blackboard eraser capable of reducing chalk dust flying

Abstract

The invention discloses a blackboard eraser capable of reducing chalk dust flying. The blackboard eraser comprises a box body; a plurality of rubber assemblies are symmetrically installed on the innerwall of the box body; a plurality of friction rollers are symmetrically and rotationally connected to the interior of the box body, and first gears are coaxially installed on the friction rollers located at the two ends; two second gears are symmetrically and rotationally connected to the interior of the box body; two installation seats are symmetrically and fixedly connected to the inner side wall of the box body; a plurality of reset springs are symmetrically and fixedly connected to the lower surface of each installation seat; an L-shaped rack is fixedly connected to the lower ends of themultiple reset springs located on the same installation seat; and a sponge is installed at the upper ends of the two L-shaped racks and symmetrically provided with a plurality of dust collection holes, and a filter net is arranged in each dust collection hole. The blackboard eraser has the advantages that the structure is ingenious, using is convenient, chalk dust can be sucked through the simplephysical common sense, and the damage of chalk dust flying to human bodies is reduced.

Description

Technical field [0001] The invention relates to the technical field of education and teaching supplies, in particular to a blackboard eraser for reducing chalk dust. Background technique [0002] The blackboard eraser is a common item in the current teaching field. It is generally used to facilitate the teacher to clean the chalk characters on the blackboard. It is easy to use and efficient. However, the existing blackboard eraser will produce chalk dust when used, and part of the chalk dust is adsorbed on the blackboard When the blackboard eraser moves, some chalk dust gathers on the side of the blackboard eraser. The more and more it gathers, the sponge at the lower end of the blackboard eraser cannot absorb effectively. When the blackboard eraser moves quickly, due to its own inertia, the chalk dust It is pasted on the side wall of the blackboard eraser, but when the blackboard eraser stops working away from the blackboard, it flies under the action of its own gravity and the ...

AI Technical Summary

Problems solved by technology

[0002] Blackboard eraser is a common item in the existing teaching field. It is generally used to facilitate teachers to clean the chalk characters on the blackboard. It is easy to use and high in efficiency. However, when the existing blackboard eraser is used, chalk dust will be produced, and part of the chalk dust will be adsorbed on the blackboard. Erase it, but there are still some chalk dust gathered on the side of the blackboard eraser when the blackboard eraser moves, and the more it gathers, the sponge at the bottom of the blackboard eraser can no longer effectively absorb it. When the blackboard eraser moves quickly, due to its own inertia, the chalk dust It is pasted on the side wall of the blackboard eraser, but when the blackboard eraser stops working and is away from the blackboard, it will fly under the action of its own gravity and the wind generated by the movement of the blackboard eraser, seriously affecting the health of teachers and students

Images