Blackboard with full-automatic blackboard eraser

Abstract

The invention discloses a blackboard with a full-automatic blackboard eraser. Universal wheels are installed under a base, a motor is connected with a crank, the crank is sequentially connected with aconnecting rod and a rocker through hinges, a projection screen is installed on a rotating shaft in a rolling mode, the upper edge of a blackboard body is provided with an upper slide rail, the innersides of a protective cover are in a long box shape, one inner side of the protective cover is provided with a rack and connected with the upper border of the blackboard body, a back cover plate is connected with the rocker through a hinge, side plates on the two sides of a blackboard eraser frame are provided with shaft holes in a corresponding arrangement mode from top to bottom and provided with rotating rods, the middle section of each rotating rod is provided with a spiral tooth brush, a bottom plate is provided with shaft holes, and the axes of the shaft holes correspond to opened grooves on a top plate. According to the blackboard, by using mechanical principle knowledge and a crank-rocker mechanism, the motor drives a blackboard eraser body to move horizontally to erase chalk dustcleanly and fast, functions are diverse, and the problem is solved that health hazards exist since an existing blackboard eraser body needs to be operated manually.

Description

technical field [0001] The invention relates to teaching tools, in particular to a blackboard with a full-automatic blackboard eraser. Background technique [0002] When schools or enterprises use blackboards for teaching or recording, they usually need to use the blackboard eraser body to wipe off the traces on the blackboard notebook to achieve rewriting. Most blackboard eraser bodies are usually composed of plastic shells and soft belts. Hold the plastic shell of the blackboard eraser body with one hand, make the soft belt close to the blackboard base, and rub the soft belt back and forth to realize the collision between the soft belt and the chalk residue, so that the traces of chalk on the blackboard base can be removed. However, the existing Although there are many types of blackboard eraser bodies, most of them are relatively small. It takes a long time to clean the entire blackboard eraser body, and the blackboard itself has a single function, which cannot meet the i...

AI Technical Summary

Problems solved by technology

[0002] When schools or enterprises use blackboards for teaching or recording, they usually need to use the blackboard eraser body to wipe off the traces on the blackboard notebook to achieve rewriting. Most blackboard eraser bodies are usually composed of plastic shells and soft belts. Hold the plastic shell of the blackboard eraser body with one hand, make the soft belt close to the blackboard base, and rub the soft belt back and forth to realize the collision between the soft belt and the chalk residue, so that the traces of chalk on the blackboard base can be removed. However, the existing Although there are many types of blackboard eraser bodies, most of them are relatively small. It takes a long time to clean the entire blackboard eraser body, and the blackboard itself has a single function, which cannot meet the integrated structure of existing teaching equipment. It is very inconvenient and must be cleaned. It is time-consuming and labor-intensive to operate with the help of manpower; and when it is used on a blackboard written with chalk, the chalk dust cannot be collected and processed well, and the falling chalk dust will be inhaled by the operator, which poses a hidden danger to human health

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