Dust-collecting dust-free blackboard utilizing negative pressure vacuum

Abstract

The invention discloses a dust-collecting dust-free blackboard utilizing negative pressure vacuum. The dust-collecting dust-free blackboard structurally comprises a writing panel, two side edge protection outer frames, a controllable blackboard eraser, a negative pressure dust collection device, a bottom support outer frame and a projection plate. The upper ends and the lower ends of the two sideedge protection outer frames are arranged on the left side and the right side of the bottom support outer frame. The dust-collecting dust-free blackboard has the beneficial effects that the writing panel is arranged on the dust-free blackboard so that teaching writing can be effectively carried out; an air pressure chamber is matched with a silica gel foam layer, the silica gel foam layer is usedfor sucking dust into the air pressure chamber, dust can be effectively sucked, and dust can be prevented from falling off; and the air pressure chamber and a vacuum negative pressure machine are additionally arranged on the back of the blackboard, and a certain negative pressure is formed in the air pressure chamber under the vacuum action of the vacuum negative pressure machine, so that the remote control vacuum negative pressure machine is started by the remote control blackboard eraser, and the dust-free effect can be effectively achieved through mutual cooperation between the air pressurechamber, the vacuum negative pressure machine and the remote control blackboard eraser.

Description

technical field [0001] The invention is a dust-collecting and dust-free blackboard utilizing negative pressure and vacuum, which belongs to the field of auxiliary teaching material equipment for teaching and education. Background technique [0002] The blackboard plays an important role in modern teaching and education. It can better display the teaching content of its teachers. In teaching and education, it will need to constantly wipe the blackboard, which is prone to generate more dust, and the dust-free blackboard It refers to a new type of teaching blackboard that is modified on the original blackboard to prevent dust. [0003] There are following deficiencies in the dust-free blackboard of the prior art: [0004] 1. The existing dust-free blackboard generally adopts its sponge material or transforms its blackboard eraser and writing chalk to achieve a dust-free effect, but the sponge material is easy to cause the writing on the blackboard to be unclear, and the blackb...

AI Technical Summary

Problems solved by technology

[0004] 1. The existing dust-free blackboard generally adopts its sponge material or transforms its blackboard eraser and writing chalk to achieve a dust-free effect, but the sponge material is easy to cause the writing on the blackboard to be unclear, and the blackboard eraser or writing chalk cannot be effe

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