Dustless blackboard eraser

Abstract

The invention discloses a dustless blackboard eraser which comprises a blackboard eraser body (1) and is characterized in that a dust collection cavity (2) is arranged inside the blackboard eraser body (1), a metal static filter screen (3) is arranged above the dust collection cavity (2), a flip-open cover (4) at the rear end of the blackboard eraser body (1) is communicated with the dust collection cavity (2), a ground-glass plate (5) is fixedly arranged on the metal static filter screen (3), a roller (6) supported in a rotating manner is arranged inside the blackboard eraser body (1), a silk layer is arranged on the outer surface of the roller (6), when the roller (6) rolls, the roller (6) and the ground-glass plate (5) are in mutual friction, and an erasing strip (7) is arranged inside the blackboard eraser body (1). The dustless blackboard eraser has a simple structure, is unique in design, can prevent chalk ash from flying by using the principle of electrostatic adsorption, and can uniformly collect the chalk ash.

Description

technical field [0001] The invention relates to a blackboard eraser, in particular to a dust-free blackboard eraser which can prevent chalk dust from flying and collect chalk dust in a concentrated manner. Background technique [0002] Blackboard and chalk are the most common and widely used teaching tools. They are welcomed by teaching workers and students because they can be used repeatedly. However, while it brings convenience to people, there are still some problems. The biggest problem is Exactly when wiping the chalk writing, the chalk dust will fly everywhere, seriously affecting the health of teachers and students who are closer to the blackboard. Lung disease has become one of the high incidences of teachers in this profession. In order to ensure the health of teachers, there are some blackboard erasers on the market that can collect chalk dust, but the common problem of these blackboard erasers is that the structure is complex and the cost is high. , not suitable ...

AI Technical Summary

Problems solved by technology

[0002] Blackboard and chalk are the most common and widely used teaching tools. They are welcomed by teaching workers and students because they can be used repeatedly. However, while it brings convenience to people, there are still some problems. The biggest problem is Just when wiping the chalk writing, the chalk dust will fly around, seriously affecting the health of teachers and students who are closer to the blackboard

Lung disease has become one of the high incidences of teachers in this profession. In order to ensure the health of teachers, there are some blackboard erasers on the market that can collect chalk dust, but the common problem of these blackboard erasers is that the structure is complex and the cost is high. , not suitable for promotional applications

Images