Automatic dust-free wiper

摘要

The traditional blackboard is to rely on artificial wiped the handwriting effort and produce dust, causing inconvenience to the teacher in class, also affect the quality of students listening lectures. Institutional innovation reform to solve these problems by this design, the basis of the principle of mechanical transmission, avoiding artificial effort also improve the students listening environment, replace the traditional blackboard whole process of automatic polishing off the writing on the blackboard and automatic vacuuming clean, environmental protection and the structure is simple, manufacture easily, promote efficiency of the teacher in class.