Environmentally friendly blackboard eraser

Abstract

The invention discloses an environment-friendly blackboard eraser. The environment-friendly blackboard eraser comprises a shell and a wiper roll, a dust storage bin is arranged between the shell and the wiper roll, a plurality of water bags are arranged on the shell, first rotary shafts are connected with the two ends, on the two sides of the wiper roll, of the shell, and first gears are fixedly connected to the first rotary shafts; the wiper roll is fixedly connected to the position, on the two sides of the shell, between the first gears, two second gears mesh with each first gear, an absorption massage mechanism is arranged on each second gear, each absorption massage mechanism comprises a second rotary shaft, and the second rotary shaft penetrates through the center of the corresponding second gear and is rotatably connected with the shell; a first bevel gear is fixedly connected with the end, far away from the shell, of each second rotary shaft, the first bevel gear meshes with a second bevel gear, a third rotary shaft penetrates through and is fixedly connected with the center of the corresponding second bevel gear, one end of the third rotary shaft is rotatably connected with the shell, and an impeller is fixedly connected with the other end of the third rotary shaft. According to the environment-friendly blackboard eraser, compared with the prior art, when the blackboard is wiped, dust can be prevented from flying, and palm fatigue can be relieved.

Description

technical field [0001] The invention relates to the field of teaching aids, in particular to an environment-friendly blackboard eraser. Background technique [0002] Blackboard eraser has always been used as one of the teaching tools, and is widely used in teaching to play the role of erasing chalk characters. Ordinary blackboard erasers generally include a housing and a wiping roller. The wiping roller is bonded in the housing. When wiping the blackboard, the user holds the housing, and the wiping roller rubs against the blackboard to erase the chalk characters. Generally, dust will be raised and cause air pollution. And these dusts are easily inhaled by people, causing bodily harm to people. [0003] For this reason, the patent document with the application number CN201410220713.9 discloses a mechanical dust-absorbing blackboard eraser, which includes a housing, the front end of the housing is fixedly provided with a wiping mechanism, and the rear end of the housing form...

AI Technical Summary

Problems solved by technology

[0004] Although the above scheme scrapes the chalk dust on the wiping roller into the ash storage bin through the dust removal brush, it can purify the classroom environment and protect the health of teachers and students, but it also has the following disadvantages: 1. This scheme only removes the chalk dust by using the wiping roller. The dust is wiped off, and then the dust is brought into the housing through the wiping roller, and the surface of the wiping roller is cleaned with a dust removal brush. However, in the actual wiping process of the blackboard, it is impossible for all the chalk dust to adhere to the wiping roller. In the process of wiping, there will still be chalk dust falling directly from the blackboard and flying in the air, causing dust pollution to the classroom environment; 2. When wiping the blackboard, because it needs to use greater strength when wiping Press the wiping roller on the blackboard. In this way, after wiping the blackboard for a long time, the hands will generally feel sore and soft. Therefore, the blackboard eraser of this solution will easily make the palm of the hand tired.

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