Dustproof chalk sleeve for classroom

Abstract

The invention relates to the technical field of stationery, in particular to a dustproof chalk sleeve for a classroom. The dustproof chalk sleeve comprises a first shell, a second shell and a box. A pressing block is in sliding connection to the middle of the top end of the second shell. A second gear is fixedly connected to the bottom end of the pressing block. A limiting block is fixedly connected to the bottom end of a first gear. A chalk seat is fixedly connected to the bottom end of a second spring. Chalk is in sliding connection to the inner wall of the chalk seat. The outer side of thebottom end of the chalk is connected with a first spring in a sleeved manner. The right side of the first shell is fixedly connected with the box. A water baffle is fixedly connected with a water conveying pipe. A water inlet pipe is fixedly connected in the top end of the water conveying pipe. A button is in sliding connection to the middle of the right side of the box. The left end of the buttonis fixedly connected with a fixed block. A nozzle is fixedly connected to the bottom end of the box. The dustproof chalk sleeve is scientific and reasonable in structure, dust prevention is achieveddirectly from the source, use is convenient, huge economic benefits and wide market requirements are achieved, and the dustproof chalk sleeve is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of stationery, in particular to a dust-proof chalk cover for classrooms. Background technique [0002] At present, chalk teaching aids are still an essential tool for teaching. Teachers often use chalk to write on the blackboard. Due to the strong adsorption capacity of chalk dust, the hand and the chalk are in direct contact for a long time, and the skin of the hand will be serious. Damaged, flying dust falls on people and in the classroom, which is very unfavorable to human health, especially easy to induce respiratory diseases, and also seriously pollute the environment in the classroom. Therefore, the demand for dust-proof chalk covers for classrooms is growing. [0003] Generally, chalks used in classrooms do not have dust-proof chalk covers. Users who directly touch the chalk will be contaminated with dust on the chalk, and the dust will spread while writing. The direct inhalation of dust will have a d...

AI Technical Summary

Problems solved by technology

[0002] At present, chalk teaching aids are still an essential tool for teaching in class. Teachers often use chalk to write on the blackboard. Due to the strong adsorption capacity of chalk dust, the hand will be in direct contact with chalk for a long time, and the skin on the hand will be severely damaged. Damaged, flying dust falls on people and the classroom, which is very harmful to human health, especially easy to induce respiratory diseases, and also seriously pollutes the environment in the classroom. Therefore, the demand for dust-proof chalk sets for classrooms is increasing

[0003] General classroom chalk does not have a dust-proof chalk cover. Users who directly touch the chalk will be contaminated with dust on the chalk. When writing, there will be dust scattered. The direct inhalation of dust will have a direct impact on people's health. Ordinary chalk The cover only reduces the user's contact with the chalk, but the dust when the chalk is written will be scattered in the surrounding environment, directly affecting the air, and then affecting the environment of the entire classroom. Therefore, a dust-proof chalk cover for classrooms is proposed to address the above problems

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