Adjustable cambered surface dustproof blackboard

Abstract

The invention provides an adjustable cambered surface dustproof blackboard. The blackboard comprises a flexible blackboard body, an arc-shaped frame and a fixing frame, wherein the upper portion and the lower portion of the flexible blackboard body are connected with the arc-shaped frame. The blackboard further comprises adjusting devices, the arc-shaped frame is connected with the fixing frame through the adjusting devices, and the arc-shaped frame is made of elastic materials; a left rotating cylinder and a right rotating cylinder are arranged on two side edges of the fixing frame; the flexible blackboard body is twined on the left rotating cylinder and the right rotating cylinder, and a head end of the flexible blackboard body is connected with a tail end of the flexible blackboard body; the blackboard further comprises an anion generator and pole straps, wherein the pole straps are arranged on the fixing frame, and connected with the anion generator; and the blackboard further comprises a rolling roller, and the rolling roller is arranged on the fixing frame, and the surface of the rolling roller is in contact with an arc surface convex part formed by the flexible blackboard body. The distance between the arc-shaped frame and the connecting point of the fixing frame is adjusted through the adjusting devices, then the radian of the arc-shaped frame is adjusted, therefore, different radian can be adjusted according to different ambient light, the light reflection phenomenon is reduced, an electrostatic field is generated between the pole strips, so that the powder is generated when the flexible blackboard body is used, and the powder can be effectively absorbed by the electrostatic field and cannot diffuse to the surrounding environment.

Description

Technical field [0001] The invention relates to the technical field of educational and cultural appliances, in particular to an adjustable arc surface dustproof blackboard. Background technique [0002] The existing blackboards are generally flat, and the sides of such blackboards are prone to reflect light, making it difficult for people sitting on both sides of the blackboard to see clearly. Some curved blackboards have also appeared in the market to reduce reflections. But the size and radian of these arc-faced blackboards are made in advance. During use, the illumination angle of the ambient light on the blackboard changes from time to time. Therefore, the reflective effect of this curved blackboard is only effective under certain circumstances. Moreover, traditional blackboards usually need to be erased manually, and a large amount of dust is generated during the erasing process, which is not good for the health of the surrounding people. Summary of the invention [0003] ...

AI Technical Summary

Problems solved by technology

During use, the angle of ambient light on the blackboard changes from time to time. Therefore, the reflective effect of this curved blackboard is only effective under certain circumstances.

Moreover, traditional blackboards usually need to be manually erased, and a large amount of dust will be generated during the erasing process, which is not conducive to the health of the surrounding people

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