Blackboard with automatic blackboard eraser

Abstract

The invention relates to a blackboard with an automatic blackboard eraser. Two guide rails are respectively fixed on the two sides of the blackboard; a blackboard eraser cross rod is connected into the guide rails through sliding blocks; one side of the blackboard eraser cross rod is provided with a motor and a friction wheel; the friction wheel is connected with the outer side face of the corresponding guide rail in a rolling frictional contact manner; a center hole of the friction wheel is fixedly connected with the output shaft of the motor; the other side of the blackboard eraser cross rod is provided with a pinch roller; the pinch roller is connected with the outer side face of the corresponding guide rail in a rolling contact manner; a sliding groove is formed in the middle of the blackboard eraser cross rod; a blackboard eraser sliding seat is connected onto the blackboard eraser cross rod in a sliding manner; the blackboard eraser sliding seat is internally provided with another friction wheel; the friction wheel is connected with the sliding groove in the middle of the blackboard eraser cross rod in a rolling frictional contact manner; the friction wheel is fixedly connected with the output shaft of the motor fixed on the front end face of the blackboard eraser sliding seat; the upper end of the rear of the blackboard eraser sliding seat is provided with a handwriting detector, the middle part of the rear of the blackboard eraser sliding seat is connected with the blackboard eraser, and the lower end of the rear of the blackboard eraser sliding seat is provided with a dust sucking device. According to the blackboard, words and characters on the blackboard can be cleaned automatically, and the blackboard has the characteristics of convenient use, labor saving, high cleaning efficiency, simple structure and the like, and is convenient to popularize and use.

Description

technical field [0001] The invention relates to a blackboard, in particular to a blackboard with an automatic blackboard eraser. Background technique [0002] Existing blackboard eraser is to be made by loading onto the felt class material that is easy to wipe off chalk writing by above the plank. When cleaning the blackboard, although the chalk characters were wiped off, the chalk dust flew everywhere, staining hands, clothes and faces. Because the arms rotate back and forth when wiping the blackboard, it is also very labor-intensive. In addition, the rotation also increases the air flow, making the dust spread farther and polluting the environment. Long-term inhalation of dust is harmful to the physical and mental health of students and teachers. Very unfavorable, dust flying is very unhygienic at the same time, and existing blackboard eraser life-span is short, and material waste is serious, does not meet the concept of national energy conservation and environmental prot...

AI Technical Summary

Problems solved by technology

Although it can automatically and cleanly remove the characters on the blackboard, its structure is complicated and its manufacturing cost is high, so it is not suitable for popularization and use.

Images