Method for manufacturing automatic blackboard eraser

Abstract

The invention discloses a method for manufacturing an automatic blackboard eraser, which comprises a blackboard, a traction device, a blackboard eraser slot, a blackboard eraser and a sliding bar, wherein the traction device is arranged above the blackboard, the sliding bar is arranged below the blackboard, and two ends of the blackboard eraser slot are connected with the traction device and the sliding bar respectively. The manufacturing method comprises the following steps: the traction device is fixedly arranged above the blackboard, and the sliding bar is fixedly arranged below the blackboard; one end of the blackboard eraser slot is fixedly arranged on a belt of the traction device, and the other end of the blackboard eraser slot is sheathed on the sliding bar; and a switch, a power supply and a counter are arranged on one side of the blackboard, and the power supply, the traction device, the counter and the switch are connected by leads so as to form a closed loop. Compared with the prior art, by adopting the structure, the blackboard eraser can automatically wipe the blackboard under the driving of the traction device, thus being time-saving and effort-saving, having no situation that some places can not be wiped due to shortage of a person, and also being capable of avoiding breathing of chalk dust and beneficial to health.

Description

technical field [0001] The invention relates to a teaching aid, in particular to a method for making an automatic blackboard eraser. Background technique [0002] The blackboard does not specifically refer to the black board surface. In the traditional sense, it is a plane that can be written repeatedly. The board surface is hard and is mostly used for teaching. Mostly black, dark green, white. Chalk is generally used for writing on blackboards. Its main components are calcium carbonate (limestone) and calcium sulfate (gypsum), or a small amount of calcium oxide. Chalk is not easy to decompose, and its particles are larger than dust. A blackboard eraser is a tool used to erase words or graphics on a blackboard, usually consisting of an eraser board and a wiper on one side. [0003] Ordinary blackboard erasers are usually used by people to wipe the blackboard with their hands, which is time-consuming, laborious, dirty and tiring. Not only is the chalk dust generated when wi...

AI Technical Summary

Problems solved by technology

[0003] Ordinary blackboard erasers are usually used by people to wipe the blackboard with their hands, which is time-consuming, laborious, dirty and tiring. Not only is the chalk dust generated when wiping the blackboard inhaled into the air duct very uncomfortable, it is easy to cause diseases, and it will also It is difficult for some people who are not tall to wipe the blackboard

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