Multifunctional teaching blackboard

Abstract

The invention discloses a multifunctional teaching blackboard. The multifunctional teaching blackboard comprises a main blackboard, a driving motor and a hydraulic lifting device, wherein a secondary blackboard is arranged in the main blackboard; a fixed disk is arranged on a front panel of the main blackboard, a first swing arm is hinged to a fixed plate, and a second swing arm is connected to the first swing arm through a pin shaft; a dust collection eraser is rotatably connected to the second swing arm, and a dust collection port is formed in the bottom of the dust collection eraser; and the dust collection port communicates with a dust collection box through a dust collection pipe, and the dust collection box communicates with a negative-pressure pump. According to the multifunctional teaching blackboard, the secondary blackboard which can be stored is arranged, so that a writing area is increased, and the blackboard writing effect is increased; the dust collection eraser is arranged, so that chalk dust is efficiently collected, and physical health of teachers and students is protected; and the lifting device is arranged, so that the visual effect of the blackboard is increased, and the teaching quality is guaranteed.

Description

technical field [0001] The invention relates to the field of teaching tools, in particular to a multifunctional teaching blackboard. Background technique [0002] The blackboard is the writing board for teaching staff to write on the blackboard. The area of ​​the common blackboard is fixed. When writing a large amount of teaching content on the blackboard, you have to erase part of the content before writing. The teacher has to keep reminding Asking whether this part of the content is written down is not conducive to teaching, especially when deriving long formulas, line breaks will interrupt students' thinking, which is not conducive to teaching; It is difficult for the students in the back row to see the content of the writing on the blackboard at the bottom of the blackboard. The visual effect of the blackboard is poor, which affects the teaching effect; It will cause greater harm; when teaching geometry, it is necessary to draw geometric figures. Manual drawing is not o...

AI Technical Summary

Problems solved by technology

[0002] The blackboard is the writing board for teaching staff to write on the blackboard. The area of ​​the common blackboard is fixed. When writing a large amount of teaching content on the blackboard, you have to erase part of the content before writing. The teacher has to keep reminding Asking whether this part of the content is written down is not conducive to teaching, especially when deriving long formulas, line breaks will interrupt students' thinking, which is not conducive to teaching; It is difficult for the students in the back row to see the content of the writing on the blackboard at the bottom of the blackboard. The visual effect of the blackboard is poor, which affects the teaching effect; It will cause greater harm; when teaching geometry, it is necessary to draw geometric figures. Manual drawing is not only a waste of time, but also the drawing effect of graphics is poor, wasting precious classroom time

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