Blackboard

Abstract

The invention discloses a blackboard. The blackboard comprises a frame body, a first blackboard surface, two blackboard surfaces, a controller and an automatic wiping device. The frame body is a rectangular structure, and the frame body is installed on the wall of a classroom. The first blackboard Both ends of the blackboard surface and the second blackboard surface are slidingly connected to the inner side of the rectangular structure. Both the first blackboard surface and the second blackboard surface can move up and down along both sides of the inner wall of the frame. The first blackboard surface is located in front of the second blackboard surface and the second blackboard surface A blackboard surface is parallel to the second blackboard surface, and two chains are respectively arranged on both sides of the top surface of the first blackboard surface, and the chains pass through the lifting drive device and are respectively fixed on both sides of the top surface of the second blackboard surface, The blackboard is provided with racks on the outer walls of the two ends of the frame body, and the racks have two outer walls vertically arranged on the two ends of the frame body respectively, and a wiping device is installed on the racks. The invention can realize flexible wiping of the blackboard, save manpower and improve efficiency.

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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