Dust-free writing equipment for environment-friendly teaching

Abstract

The invention relates to the technical field of teaching equipment, in particular to dust-free writing equipment for environmental protection teaching, which comprises a mounting column, a rolling column is rotatably connected in the mounting column, and the rolling column is sleeved with dust-free soft leather. According to the dust-free soft leather winding device, a clockwork spring can gradually drive a winding column to wind dust-free soft leather, so that pulling force can be applied to U-shaped plates on the two sides, supporting rods can be driven to gradually contract into a rotating column, the dust-free soft leather on the two sides can be wound into a mounting column again, and therefore the whole writing device can be conveniently stored; the dust-free equipment can be conveniently carried, the dust-free soft leather can be unfolded for dust-free writing when needed, a teacher can conveniently carry out teaching outdoors and the like, and the dust-free soft leather on the two sides can be unfolded to the length twice that of the rotating column, so that the writing equipment has enough area for writing on a blackboard and the like. And the dust-free soft leather is rapidly rewound through cooperation with the winding column, and the surface of the dust-free soft leather can be rapidly cleaned in the rewinding process.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, in particular to a dust-free writing equipment used for environmental protection teaching. Background technique [0002] For a long time people have made blackboards with materials such as wood boards, glass boards, and stone slabs, and written on them with chalk, which provides necessary conditions for people's learning, but this blackboard device has the following disadvantages: one is friction resistance The second is that the dust pollution is serious during wiping, which is not only dirty hands and clothes, but also endangers human health; the third is that the writing on the blackboard is not easy to wipe off; the fourth is that chalk and blackboard brushes consume a lot. The current blackboard for writing is not easy to store and carry, so it is not convenient to move to the outdoors for teaching use. When the blackboard is wiped with a blackboard eraser, the chalk dust generate...

AI Technical Summary

Problems solved by technology

[0002] For a long time people have made blackboards with materials such as wood, glass, and slate, and written on them with chalk, which provides necessary conditions for people's learning, but this blackboard device has the following disadvantages: one is frictional resistance The second is that the dust pollution is serious during wiping, which not only dirty hands and clothes, but also endangers human health; the third is that the writing on the blackboard is not easy to clean; the fourth is that chalk and blackboard brush consume a lot

The current blackboard for writing is not easy to store and carry, so it is not convenient to move to the outdoors for teaching use. When the blackboard is wiped with a blackboard eraser, the chalk dust generated may be inhaled into the lungs by students or teachers, which is not easy for teachers and teachers. The health of students, and chalk dust will spread into the air, which will affect the environmental protection of schools or outdoors, and the cleaning efficiency of writing equipment is low and labor-intensive through manual wiping

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