Blackboard

Abstract

The invention discloses a blackboard. The blackboard comprises a frame body, a first blackboard surface, a second blackboard surface, a controller and automatic wiping devices, wherein the frame body has a rectangular structure and is mounted on a wall of a classroom; two ends of the first blackboard surface and two ends of the second blackboard surface are slidably connected to the inner side of the rectangular structure respectively; the first blackboard surface and the second blackboard surface can move vertically along two sides of the inner wall of the frame body; the first blackboard surface is positioned in front of the second blackboard surface and is parallel to the second blackboard surface; two chains are respectively arranged on two sides of the top end surface of the first blackboard surface; the chains penetrate through a lifting driving device and are respectively fixed on two sides of the top end surface of the second blackboard surface; racks are arranged on outer side walls of two ends of the frame body of the blackboard; the two racks are respectively and vertically arranged on the outer side walls of two ends of the frame body; and the wiping devices are mounted on the racks. The blackboard can be wiped flexibly, the labor is saved, and the efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of teaching tools, and in particular relates to a blackboard. Background technique [0002] The blackboard is a commonly used teaching tool, but the blackboards currently on the market must use a blackboard eraser to wipe off the chalk dust, which will generate a lot of dust, which will cause harm to the teacher on the podium and the students in the front row, and the teacher's section The class needs to wipe the blackboard many times, which is not only troublesome but also a waste of energy. Especially in the lecture hall of the university, the blackboard that is pushed up and down is used. It is very difficult for the blackboard to slide, and sometimes even the sliding blackboard is directly stuck, which brings trouble to the teaching activities. Therefore, it is necessary to design a new type of blackboard to solve the above problems. Contents of the invention [0003] According to the deficiencies in ...

AI Technical Summary

Problems solved by technology

[0003] According to the deficiencies in the prior art above, the technical problem to be solved by the present invention is to propose a blackboard, realize the up and down movement of the blackboard surface through an electric drive device, and automatically wipe through the automatic wiping device and collect the dust generated by the wiping to solve the problem It solves the trouble of traditional push-pull blackboards and cannot be wiped automatically. It has the characteristics of simple structure and high wiping efficiency.

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