dust removal blackboard eraser

Abstract

The invention discloses a blackboard eraser capable of removing accumulated dust. The blackboard eraser comprises a casing, an eraser belt, rotary barrels, rotary shafts, a support plate, an accumulated dust brush, a rear cover and a connecting component, wherein the casing is a cavity provided with an opening; a rear cover is arranged opposite to the opening and is connected to the cavity through the connecting component so as to shield the casing; a pair of rotary shafts are connected to the casing in parallel; the rotary barrels are respectively sleeved on the rotary shafts; the eraser belt is a closed soft belt which is sleeved on the two rotary barrels; after the eraser belt is sleeved on the two rotary barrels, a flat and straight segment at one side of the eraser belt extends out of the opening of the casing so as to brush a blackboard; the support plate is arranged between the two rotary barrels; two ends of the support plate are fixedly connected to the casing so as to support the flat and straight segment, extending out of the opening of the casing, of the casing; the brush body of the accumulated dust brush is fixed on the rear cover; the brush bristles of the accumulated dust brush are in contact with the flat and straight segment at the other side of the eraser belt. The blackboard eraser is used for brushing the blackboard by performing a lateral motion and used for removing the accumulated dust by performing a vertical motion. Thus, the blackboard eraser is convenient and practical and is capable of greatly reducing the dust pollution.

Description

technical field [0001] The invention relates to a teaching tool, in particular to a blackboard eraser that can easily remove dust accumulated on a wiping cloth. Background technique [0002] The blackboard eraser is an indispensable tool for teaching work, but after using the blackboard eraser for a period of time, a thick layer of chalk dust will accumulate on the felt cloth. When you want to continue using it, you often need to find a place to tap other objects to shake off the accumulated dust. . This method of use is very inconvenient, and it is easy to cause dust pollution. Although there are also many blackboard eraser designs to reduce dust pollution, such as Chinese patent documents, publication numbers CN103213437A and CN102950943A, most of their designs are aimed at wiping dust, and there is no design for removing dust accumulated by wipers. The Chinese patent document, the patent with the publication number of CN101746194A, discloses a design in which the wiper ...

AI Technical Summary

Problems solved by technology

This way of use is very inconvenient, and it is easy to cause dust pollution

Though there are also many blackboard eraser designs for reducing dust pollution, such as Chinese patent documents, the publication numbers are CN103213437A, CN102950943A, but most of their designs are aimed at wiping and brushing dust, and there is no design for removing dust from the wiper

Chinese patent document, publication number is the patent of CN101746194A, discloses a kind of design by constantly changing wiping cloth by two rotating shaft cores, the advantage is that dust accumulation can be rolled into the insert box to reduce chalk dust flying, but the disadvantage is This invention cannot remove the accumulated dust on the wiper in time, and the wiper needs to be replaced constantly

Only half of the wiping action of this design is used to wipe the blackboard, which greatly affects work efficiency

And the discontinuity of wiping will also affect the operation and wiping effect

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