A kind of automatic chalk device and using method thereof

Abstract

The invention discloses an automatic chalk device and a using method thereof, which belong to the field of teaching appliances. The automatic chalk device includes a chalk storage box and a chalk cover matched with the chalk storage box. The chalk storage box includes a storage part for storing chalk and an elastic telescopic discharge part for outputting chalk, the elastic telescopic discharge part is arranged on the side of the discharge port of the storage part and communicates with the inside of the storage part, the elastic telescopic discharge part includes at least one spring actuation mechanism, When the chalk cover pushes the spring actuation mechanism along the chalk axial direction, the spring actuation mechanism moves from the blocking position to the chalk to the non-blocking position, so that the chalk is snapped into the chalk locking cavity inside the chalk cover. The automatic chalk device disclosed by the invention can automatically fill the chalk stored in the chalk storage box into the chalk case without manual insertion, which is more convenient, hygienic and healthy.

Description

technical field [0001] The invention relates to the field of teaching aids, in particular to an automatic chalk device and a using method thereof. Background technique [0002] Chalk is a tool widely used in daily life, generally used for writing on blackboards, and is a necessity for teachers in the teaching field. The composition of chalk is a white precipitate of calcium sulfate, which is not easily decomposed, and the particles are larger than dust. The main components of chalk used in China are calcium carbonate (limestone) and calcium sulfate (gypsum), or contain a small amount of calcium oxide. [0003] Teachers usually take chalk directly with their hands to write, and it is easy to contaminate their fingers with chalk dust, and chemical pigments are added to chalks of different colors, which is a major hidden danger for personal hygiene and skin health, and it is difficult to pinch chalk. The parts will be colored with chalk, causing the teacher's hands to get dir...

AI Technical Summary

Problems solved by technology

However, in the existing chalk case, it is still necessary to manually take out the chalk from the chalk box, and then fill the chalk into the chalk case, and still have more contact with the chalk, and cannot avoid contact with the chalk to the greatest extent, and when filling the chalk Due to the design of the existing chalk set, the clamping cavity is narrow, manual filling is time-consuming and laborious, and it is inconvenient to fill.

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