A blackboard that automatically erases chalk writing

Abstract

The invention discloses an automatic chalk handwriting wipe-away blackboard which comprises a blackboard body, a slide frame, a board wiper base, a board wiper body, a collecting tank, a water storage cavity, a top rod, a first drive mechanism, a second drive mechanism and a control device. The slide frame comprises a pair of transverse first guide rails and a vertical second guide rail. The collecting tank is connected to the lower side of the board wiper base. The water storage cavity is formed in the board wiper base. A water permeable hole is formed in the lower side of the board wiper base. A diaphragm part is arranged at the water permeable hole and is composed of a pair of rubber pieces. The middle parts of the pair of rubber pieces are overlapped. The top rod is arranged in the collecting tank. When the front side wall makes close contact with the blackboard body, the blackboard body abuts against one end of the top rod, and the other end of the top rod exerts pressure on the diaphragm part so that the middle parts of the pair of rubber pieces can be separated from each other. The control device controls the first drive mechanism and the second drive mechanism to work alternately. Chalk handwriting on the blackboard body is automatically wiped away.

Description

technical field [0001] The invention relates to a blackboard for automatically erasing chalk writing. Background technique [0002] Although electronic whiteboards are increasingly used in the field of classroom teaching, it is a time-consuming and laborious task to completely replace the equipment, and blackboards are still the most commonly used teaching aids. Especially for some teachers with many years of teaching experience, chalk writing on the blackboard has almost become an important part of their teaching. But the inconvenience of the traditional blackboard is that at the end of each class, or before writing on the blackboard needs to be rewritten, the chalk writing on the blackboard needs to be manually erased. On the one hand, it is a waste of time, and on the other hand, chalk dust is also likely to have adverse effects on human health. Contents of the invention [0003] The present invention designs and develops a blackboard that automatically erases chalk w...

AI Technical Summary

Problems solved by technology

But the inconvenience of the traditional blackboard is that at the end of each class, or before writing on the blackboard needs to be rewritten, the chalk writing on the blackboard needs to be manually erased

On the one hand, it is a waste of time, and on the other hand, chalk dust is also likely to have adverse effects on human health.

Images