Dustproof protecting sleeve for chalk

Abstract

The invention relates to the technical field of teaching supplies, in particular to a dustproof protecting sleeve for chalk. The dustproof protecting sleeve comprises a chalk holder and a chalk head.Blackboard erasers are fixedly connected to the two sides of the upper end of the chalk holder. A battery groove is fixedly connected to the left side of the top of the chalk holder. Dust sucking openings are formed in the upper end and the lower end, located on the blackboard erasers, of the chalk holder correspondingly. A wind outlet is formed in the center position of the top of the chalk holder. A fan is fixedly connected to the lower end of the wind outlet and fixed to the inner side of the chalk holder. A filter screen is fixedly connected to the lower end of the fan and fixedly connected to the inner side of the chalk holder. Bolts are connected to the lower sides of the two ends of the chalk holder in a sliding manner. By means of fixing of the bolts, the chamber is formed, the sucking effect on generated chalk dust is achieved, the sucked chalk dust is stored on the inner side of the chalk head, when the chalk head is full of the dust, the bolts can be adjusted, the chalk headis disassembled, the collected chalk dust is treated, pollution to air from the chalk dust is reduced, and the body health of teachers and students is benefitted. The dustproof protecting sleeve hasgreat economic benefits and wide market value, and is worth being used and popularized.

Description

technical field [0001] The invention relates to the technical field of teaching appliances, in particular to a chalk dustproof protective cover. Background technique [0002] The chalk dustproof protective cover can assist teachers in teaching, fix the chalk, absorb the chalk dust generated during the writing process and the process of wiping the blackboard, and can fix two chalks, and can adjust the protruding length and protection of the chalk according to the teacher's personal habits. The device with the total length of the cover is simple in design and low in manufacturing cost, can effectively solve the dust generated in the teaching process, and is beneficial to the health of teachers and students. Therefore, the demand for the chalk dustproof protective cover is increasing. [0003] During the teaching process, the teacher directly touches the chalk with his hand to write, so that the dust on the surface of the chalk falls directly on the surface of the skin, and the...

AI Technical Summary

Problems solved by technology

[0003] During the teaching process, the teacher directly touches the chalk with his hand to write, so that the dust on the surface of the chalk falls directly on the surface of the skin, and the chalk dust generated during the writing process and the process of wiping the blackboard falls into the air. Teachers and students inhale chalk dust by breathing, which greatly affects the health of teachers and students. Therefore, a kind of chalk dustproof protective cover is proposed for the above problems

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