Integrated combined type rotary environmentally-friendly blackboard

Abstract

The invention discloses an integrated combined type rotary environmentally-friendly blackboard, which comprises a bottom plate. Four limiting blocks are arranged on the lower end of the bottom plate;cavities are arranged in the limiting blocks; limiting devices are arranged in the cavities; four bearing blocks are arranged on the upper end of the bottom plate; two sleeve pipes and a support blockare fixed to the upper end of each bearing block; a shock absorption spring is arranged on the bottom end in each sleeve pipe; a shock absorption plate is fixed to one end, far away from each sleevepipe, of each shock absorption spring; a pressing rod is fixed to one end, far away from each shock absorption spring, of each shock absorption plate; an installation plate is jointly fixed to upper ends of each support block and each two pressing rods; a first bearing plate is jointly fixed to the upper ends of the four installation plates; and a first groove is formed in the first bearing plate.According to the integrated combined type rotary environmentally-friendly blackboard provided by the invention, not only is dust absorbed, but also multiple blackboards with adjustable angles are arranged at the same time, so that the integrated combined type rotary environmentally-friendly blackboard is convenient to use for meeting different needs, solves a hazard problem caused by no processing of dust in the prior art, is wide in use range, has a favorable economic benefit, and is suitable to be popularized.

Description

technical field [0001] The invention relates to the technical field of blackboards, in particular to an integrally combined rotating environment-friendly blackboard. Background technique [0002] Most of the blackboards in schools are erased with blackboard erasers. The "chalk dust syndrome" caused by erasing blackboards has become the number one health hazard for teachers and students. It takes at least 16 years for a student from elementary school to college, which is the golden period of growth and development, but he is constantly harmed by chalk dust; a teacher usually takes about 40 years from standing on the podium to retiring. You have to "eat chalk dust" for most of your life. Seriously affect the health of the human body. When the teacher is teaching, he wipes the blackboard manually. At the same time, most of the chalk dust will accumulate in the small groove under the blackboard or fall to the ground. If someone walks or the wind blows, it will float on the blac...

AI Technical Summary

Problems solved by technology

Seriously affect the health of the human body. When the teacher is teaching, he wipes the blackboard manually. At the same time, most of the chalk dust will accumulate in the small groove under the blackboard or fall to the ground. If someone walks or the wind blows, it will float on the blackboard again. In the air, causing secondary pollution to the indoor environment

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