Automatic blackboard erasing device and blackboard comprising same

Abstract

The invention discloses an automatic blackboard erasing device. The device comprises an outer cover, a roller assembly and a swing motor; the swing motor is mounted on the top wall of the inner side of the outer cover; the roller assembly is rotationally supported on the bottom wall of the inner side of the outer cover; a rotating shaft of the swing motor is in transmission connection with the roller assembly, and drives the roller assembly to totally swing; the outer cover is of a cover structure opened on one side; the opened side is used for facing and buckling on the surface of a blackboard; and the back side, opposite to the opening, of the outer cover is of an arc surface structure in smooth transition. The automatic blackboard erasing device prevents the phenomenon of generation ofdouble images during rewriting due to the unclear surface of the blackboard caused by long-time use, and improves the use effect of the blackboard. Dust generated in the erasing process is absorbed bythe outer cover without flying in air, so that the use experiences of teachers and students are greatly improved, and the teaching quality improvement is facilitated.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, in particular to an automatic blackboard wiping device and a blackboard including the same. Background technique [0002] Blackboards are generally made of wood or frosted glass, and can be written on with specific writing materials such as chalk. Blackboards are mostly black, dark green, white or beige. [0003] Most of the existing blackboards are manually wiped with a blackboard eraser. When wiping, the blackboard eraser needs to be pressed firmly to wipe, but the board surface is still not clean enough after wiping, and it takes a lot of effort. Even if there are some advanced devices for wiping blackboards, the wiping effect is not ideal. After the blackboard has been used for a period of time, there are often residual traces of chalk on the blackboard surface. When writing again, double images often appear, which affects students' reading. It is easy for students in the last fe...

AI Technical Summary

Problems solved by technology

[0003] Existing blackboards are mostly wiped manually with a blackboard eraser. When wiping, you need to press the blackboard eraser firmly to wipe, but the board surface is still not clean enough after wiping, and it is laborious

Even if there are some advanced blackboard wiping devices, the wiping effect is not ideal

After the blackboard has been used for a period of time, there are often residual traces of chalk on the blackboard surface. When writing again, double images often appear, which affects students' reading. It is easy for students in the last few rows of the classroom to read very hard.

[0004] On the other hand, during the process of wiping the blackboard, because the blackboard dust is scattered into the classroom, it is very easy to inhale into the lungs of the students, especially those who wipe the blackboard often need to cover their mouth and nose while wiping to prevent the inhalation of dust. Extremely inconvenient and comfortable

Moreover, the dust of chalk is scattered on the students' books and on the classroom floor, which is not easy to clean

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