Manual up-and-down type chalk cleaning blackboard

Abstract

The invention discloses a manual up-and-down type chalk cleaning blackboard which is mainly the improvement of an up-and-down lifting type blackboard which is used for most of schools. The manual up-and-down type chalk cleaning blackboard comprises a hairbrush, a blackboard bracket, a sliding rail, a linear rail, an annular rail, a spherical ball, a position exchanging module and a dust storage box, wherein the hairbrush is arranged at the back surface of the blackboard; the linear rail and the annular rail are fixedly arranged on the bracket; and the position exchanging module comprises a ball groove, a cylinder, a fixing shaft, a baffle, a limiting plate, a torsion spring and a connecting rod. The superiority of the manual up-and-down type chalk cleaning blackboard disclosed by the invention is that the blackboard can be quickly wiped by virtue of the manual up-and-down type chalk cleaning blackboard, so the teaching time of a teacher is relatively prolonged, and the classroom efficiency is improved. Compared with a traditional blackboard wiping method, the manual up-and-down type chalk cleaning blackboard reduces flying of dust and prevents the dust from causing harms to the health of the teacher. Meanwhile, the chalk dust can be subjected to unified collection by application of the dust storage box, and the chalk dust can be conveniently reprocessed or abandoned, so the dust in a classroom is further reduced.

Description

technical field [0001] The invention belongs to the field of mechanical parts design, and in particular relates to a manual ups and downs type chalk cleaning blackboard device. Background technique [0002] Most schools, especially colleges and universities, use up-and-down blackboards, that is, when one of the blackboards is pushed, the other blackboard will move relatively. When one of the blackboards is at the highest point, the other blackboard is at the lowest point. The up and down lifting blackboard can be written on a large scale, with a lot of content written on the blackboard, and it is often necessary to manually erase the traces of chalk on the blackboard after use. At present, the traditional method of manually erasing chalk marks takes a lot of time and takes up normal teaching time; and during the erasing process, chalk dust will fall on the user's sleeves and disperse in the classroom. pollute the environment and have certain damage to human health. The inv...

AI Technical Summary

Problems solved by technology

At present, the traditional method of manually erasing chalk marks takes a lot of time and takes up normal teaching time; and during the erasing process, chalk dust will fall on the user's sleeves and disperse in the classroom. pollute the environment and have certain damage to human health

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