Laser chalk sleeve for teaching

Abstract

The invention relates to the technical field of teaching appliances, in particular to a laser chalk sleeve for teaching. The laser chalk sleeve for teaching comprises a sleeve; one end of the sleeve is provided with a cavity used for accommodating a chalk, and the end part is provided with a locking device used for locking the chalk; the other end of the sleeve is provided with a laser device; andthe laser device comprises a power supply, a laser lamp and a switch which are connected in series with one another. The laser chalk sleeve for teaching is simple in structure and liable in popularization, lowers the use cost and has very good practicability; is very convenient and simple, and improves the working efficiency in class; avoids fingers from being directly in contact with the chalk,keeps cleanness and sanitation and avoids the chalk from being easily pulled apart when being used; and can be better convenient for a teacher to use in the class, is beneficial to teaching and improves the teaching quality by arranging the laser device.

Description

technical field [0001] The invention relates to the technical field of teaching appliances, in particular to a laser chalk set for teaching. Background technique [0002] Chalk is a common article used by school teachers to write on blackboards. Now, the chalks used in China mainly include ordinary chalk and dust-free chalk. The main components are calcium carbonate and calcium sulfate, or contain a small amount of calcium oxide. Teachers often need to write and draw on the blackboard to explain. When writing, finger directly contacts with chalk, often after a class, hands are full of white powder, which pollutes hands and is unfavorable to people's health. [0003] And when the teacher is teaching, he often needs to use chalk to write on the blackboard, turn over the book, or perform other operations. After writing with chalk, the hand holding the chalk will be stained with a lot of dust. In addition, when the teacher is giving lectures, he needs to give instructions on t...

AI Technical Summary

Problems solved by technology

In addition, when the teacher is giving lectures, he needs to give instructions on the corresponding position on the blackboard. In the lower position on the blackboard, the teacher is used to using the pointer to make instructions. In the higher position on the blackboard, it is difficult for ordinary pointers to make instructions. It is necessary to use a laser pointer to indicate separately. Therefore, the teacher needs to prepare chalk, pointer, and laser pointer before class, which increases some unnecessary work and brings a lot of trouble at the same time.

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