Automatic cleaning blackboard brush

Abstract

The invention relates to the technical field of blackboard cleaning, in particular to an automatic cleaning blackboard brush which comprises a blackboard, sliding grooves and movable shafts. The sliding grooves are fixedly formed in the middles of the upper end and the lower end of the blackboard, the movable shafts are movably connected to one sides of the sliding grooves, and a power line is fixedly connected to the middle of the left side of the cross section of an insulating sleeve. The defects in the prior art are overcome, through the arrangement of the movable shafts, connecting shafts,supporting rods and lifting shafts, the situation that pupils cannot wipe the top end of a blackboard due to the insufficient height of pupils in the blackboard wiping process is avoided, the connecting shafts are driven by the movable shafts to move left and right, the lower ends of one sides of the connecting shafts are fixedly connected with the supporting rods, the upper end and the lower endof the blackboard brush are movably connected with the lifting shafts, the blackboard brush can fully automatically wipe the blackboard up and down and left and right, the blackboard can be wiped without treading a stool by students, operation is easy and convenient, risks do not exist, and actual use is facilitated.

Description

technical field [0001] The invention relates to the technical field of blackboard cleaning, in particular to an automatic cleaning blackboard brush. Background technique [0002] The blackboard newspaper is a popular publicity position that uses a fixed or mobile blackboard as a carrier, and uses chalk or advertising paint as writing and painting tools. It has the advantages of being easy to scrub, modify, and replace, and is the most economical, convenient, and common form of publicity Form, widely used in primary and secondary schools, troops, colleges and universities and factories, mines, enterprises and institutions. [0003] However, the existing blackboard brushes all use students to wipe the blackboard in shifts. During the process of wiping the blackboard, pupils are not tall enough to wipe the top of the blackboard. Students need to step on a stool to wipe the blackboard, which is cumbersome to operate. And there is a certain risk, which is not conducive to actual...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a self-cleaning blackboard brush, which overcomes the deficiencies of the prior art. On the way of wiping the blackboard, the primary school students are not tall enough to wipe the top of the blackboard. It is necessary for the students to step on the stool to wipe the blackboard. The operation is cumbersome and has certain risks, which is not conducive to practical use. The dust scattered during wiping is easily absorbed into the body of the student, making the student's respiratory tract prone to infection, and the problem of insufficient practicability in the actual use process

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