Scraper blade dust-collection blackboard eraser with handle

Abstract

The invention discloses a scraper blade dust-collection blackboard eraser with a handle. The scraper blade dust-collection blackboard eraser comprises scraper blades, a plate body and the handle. The scraper blade dust-collection blackboard eraser is characterized in that the scraper blades are fixedly connected to the surface of the plate body; the inside of the plate body is of a cavity structure, the inside of the plate body connected with the scraper blades is evenly distributed with small dust-collection holes, and the periphery of each scraper blade is distributed with a circle of big dust-collection holes; and one end of the handle is fixedly connected with the plate body, the inside of the handle is of a cavity structure, and the other end of the handle is fixedly provided with a dust collector. According to the scraper blade dust-collection blackboard eraser, the plate body is provided with the dust-collection holes, a cavity in the plate body is connected with a handle cavity, the stroke of dust led into the dust collector through dust-collection through holes is shortened, and the problem that the dust can be scattered everywhere to pollute the air of a classroom in the cleaning process of a blackboard is solved; and meanwhile, due to the handle with the length being 400mm-800mm, the range of blackboard cleaning by elementary school students or scrubby students can be widened. The scraper blade dust-collection blackboard eraser with the handle is simple in structure, thorough in dust collection, convenient and easy to use, and easy to produce and popularize.

Description

technical field [0001] The invention belongs to the technical field of teaching appliances, and in particular relates to a scraper dust-absorbing blackboard eraser with a handle. Background technique [0002] At present, the tool for writing in the classroom of school teachers is still chalk, and the chalk dust on the blackboard needs to be removed by blackboard erasers, and the blackboard erasers widely used in schools are still traditional brush-type blackboard erasers. There are two main problems in use: Problems: First, a large amount of dust is generated around the blackboard during use, causing air pollution in the classroom, especially for teachers and students sitting in the front row; second, the traditional brush-type blackboard eraser has no handle for primary school students or short students Students can't wipe the chalk characters on the high part of the blackboard. If you use a stool to wipe the chalk characters on the high part, the risk of accidental falls w...

AI Technical Summary

Problems solved by technology

[0002] At present, the tool for writing in the classroom of school teachers is still chalk, and the chalk dust on the blackboard needs to be removed by blackboard erasers, and the blackboard erasers widely used in schools are still traditional brush-type blackboard erasers. There are two main problems in use: Problems: First, a large amount of dust is generated around the blackboard during use, causing air pollution in the classroom, especially for teachers and students sitting in the front row; second, the traditional brush-type blackboard eraser has no handle for primary school students or short students Students can't wipe the chalk characters on the high part of the blackboard. If you use a stool to wipe the chalk characters on the high part, the risk of accidental falls will increase, which will bring unsafe factors to the students; Parts such as vacuum cleaners solve the problems that the dust does not disperse, the blackboard eraser is easy to fall off after a long time with the brush, and the dust is thoroughly sucked, but its structure is complicated and the production cost is high.

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