Novel rotary dust-removal blackboard eraser

Abstract

The invention discloses a novel rotary dust-removal blackboard eraser comprising an outer shell. The lower end of the outer shell is provided with an opening, a cavity is formed in the outer shell, arotating shaft is erected on the opening, a plate body is mounted on the rotating shaft, a dust-collecting sponge is detachably mounted on the plate body, and the dust-collecting sponge can be drivento overturn by 180 degrees in the cavity by rotating the plate body; a dust outlet is formed in the lower right portion of the outer shell, a handle is mounted at the right end of the outer shell, a dust storage chamber is formed in the handle, and the dust outlet communicates with the dust storage chamber; and a square hole is formed in the upper end of the outer shell, a movable handle is mounted on the square hole, and the lower end of the movable handle vertically extends to the dust-collecting sponge and can move along the square hole in a reciprocating mode. The novel rotary dust-removalblackboard eraser is simple in structure and convenient to use, the cleaning efficiency can be improved, and damage of raising dust to the respiratory tract of a user is avoided.

Description

technical field [0001] The invention relates to the field of teaching tools, in particular to a novel rotary dust-removing blackboard eraser. Background technique [0002] The blackboard is an indispensable teaching aid in daily learning, and the blackboard eraser is another teaching aid that goes hand in hand with the blackboard. Generally, the blackboard eraser used at ordinary times is not only hard and time-consuming, but also has the disadvantage of dust polluting the air. In addition, the traditional blackboard eraser is not equipped with a handle, and there is no dust erasing device on the blackboard eraser. After the blackboard is wiped, it is very inconvenient to clean the dust on the blackboard eraser, which cannot meet the needs of the actual situation. [0003] Therefore, be badly in need of providing a kind of simple in structure, the novel rotary dust-removing blackboard eraser that is easy to use. Contents of the invention [0004] The object of the presen...

AI Technical Summary

Problems solved by technology

Generally, the blackboard eraser that is usually used is not only hard and time-consuming, but also has the disadvantage of dust polluting the air.

In addition, the traditional blackboard eraser is not equipped with a handle, and there is no dust erasing device on the blackboard eraser. After wiping the blackboard, it is very inconvenient to clean the dust on the blackboard eraser, which cannot meet the needs of the actual situation.

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