A teaching dust-proof blackboard with auxiliary erasing function

Abstract

The invention discloses a teaching dustproof blackboard with an auxiliary erasing function. The teaching dustproof blackboard comprises supporting frames which are symmetrically and fixedly mounted ona wall left and right, wherein a first blackboard and a second blackboard are arranged between left and right supporting frames; a guide wheel is rotatably mounted on the supporting frames; the firstblackboard and a second slide space are mounted in a spacing mode, so that the second blackboard is firstly pulled to move downwards and then is pushed backwards, and therefore, the second blackboardcan slide upwards along the first slide base; the first blackboard downwards enters a writing area, so that the first blackboard and the second blackboard are switched, influences, on people, of dustcan be greatly reduced, and erased dust can be removed through a sucking pump and can be collected without scatter, and therefore, automatic erasing can be realized; the blackboard can be switched, and do not freely shake during writing; and a light supplementing lamp is arranged, so that writing content on the blackboard can be conveniently seen.

Description

technical field [0001] The invention relates to the field of teaching appliances, in particular to a teaching dustproof blackboard with an auxiliary erasing function. Background technique [0002] The blackboard is an indispensable teaching instrument for teaching. There are various kinds of blackboards at present, and the most economical blackboard is the traditional chalk handwritten blackboard. This kind of blackboard is very flexible, simple and convenient to use. , and the most important problem is that the dust of chalk is too large. If you use chalk for writing for a long time, the powder inhaled into the human body will cause harm to human health. When erasing chalk characters, it is the most likely time to generate dust , and after the chalk dust has accumulated too much, it is very cumbersome to remove. When it needs to be wiped off, it needs to be wiped off manually. Contents of the invention [0003] The object of the present invention is to provide a teaching...

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Problems solved by technology

[0002] The blackboard is an indispensable teaching instrument for teaching. There are various kinds of blackboards at present, and the most economical blackboard is the traditional chalk handwritten blackboard. This kind of blackboard is very flexible, simple and convenient to use. , and the most important problem is that the dust of chalk is too large. If you use chalk for writing for a long time, the powder inhaled into the human body will cause harm to human health. When erasing chalk characters, it is the most likely time to generate dust , and after the chalk dust has accumulated too much, it is very cumbersome to remove. When it needs to be erased, it must be erased manually. This will make it easier to absorb the chalk dust. It is very difficult to clean the chalk dust after it falls to the ground

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