Spraying type automatic blackboard erasing device

Abstract

The invention relates to the technical field of teaching tools, in particular to a spraying type automatic blackboard erasing device. The invention aims to provide the spraying type automatic blackboard erasing device which can reduce the time wasted in the teaching process of teachers and improve the teaching efficiency and is convenient to use, and the chalk dust cannot cause harm to a human body. In order to solve the technical problem, the invention provides the spraying type automatic blackboard erasing device which comprises a left side plate, a first sliding rail, a first sliding block,a fourth blackboard, a first shell, a second shell, a third blackboard, a first blackboard, a third shell, a fourth shell and the like; a rear side plate is welded to the rear side of the left side plate, the third shell is welded to the upper part of the right side of the left side plate, the first blackboard is connected in the third shell through bolts, and a support is welded to the left sideof the upper part of the rear side plate. According to the spraying type automatic blackboard erasing device, the second blackboard, the third blackboard and the fourth blackboard move in a staggeredmode.

Description

technical field [0001] The invention relates to the technical field of teaching tools, in particular to a spray type automatic blackboard wiping device. Background technique [0002] The blackboard does not specifically refer to the black board surface. In the traditional sense, it is a plane that can be written repeatedly. The board surface is hard and is mostly used for teaching. Made of wood or frosted glass, etc., you can write on it with specific writing materials such as chalk. Mostly black, dark green, white or beige. [0003] At present, there are many teaching contents, so there will inevitably be more teachers writing on the blackboard during the teaching process. Teachers use chalk to write on the blackboard. When the writing on the blackboard is not needed, the chalk on the blackboard needs to be erased. Chalk characters are generally operated by students or teachers, which is time-consuming and laborious, which affects the teaching efficiency of teachers. At t...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many teaching contents, so there will inevitably be more teachers writing on the blackboard during the teaching process. Teachers use chalk to write on the blackboard. When the writing on the blackboard is not needed, the chalk on the blackboard needs to be erased. Chalk characters are generally operated by students or teachers, which is time-consuming and labor-intensive, which affects the teaching efficiency of teachers. At the same time, the erased chalk dust easily enters the human body and causes damage to human health. Therefore, it is urgent to develop a method that can reduce the teaching process of teachers. A spray-type automatic blackboard wiping device that saves time wasted, improves teaching efficiency, is easy to use, and does not cause harm to the human body with chalk dust

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