A new type of blackboard eraser

Abstract

The invention discloses a novel blackboard eraser. The novel blackboard eraser comprises a blackboard eraser body, wherein a shell is arranged on the top end surface of the blackboard eraser body, felt is arranged on the two sides of the bottom end of the shell, clamping plates are arranged at the two ends of the felt at the two sides, buckles are arranged on the inner sides of the bottom ends ofthe clamping plates, grids are arranged on the inner sides of the felt on the two sides, a motor seat is arranged in the middle of the top end of the inner side of the blackboard eraser body, a motoris arranged on the inner side of the motor seat, a rotating wheel is arranged at the bottom end of the motor, the bottom end of the rotating wheel is provided with a fixed wheel, the two sides of thefixed wheel are provided with metal plates, and the bottom end of the fixed wheel is provided with a brush. According to the novel blackboard eraser, the motor is used for driving the rotating wheel,so that the brush can rotate quickly, wind force is generated in the rotating process, dust generated by friction on the inner side and the outer side of the felt is absorbed into the shell, and whenthe brush rubs against the metal plates, the rubbed metal plates can adsorb flying dust in the air due to being charged.

Description

technical field [0001] The invention relates to the field of teaching appliances, in particular to a novel blackboard eraser. Background technique [0002] The blackboard eraser is generally used in conjunction with the blackboard. It is mainly used as chalk on the blackboard to generate friction and attach to the blackboard to produce traces. Then use the blackboard eraser to rub against the blackboard. At this time, due to the small electrostatic force, the dust particles of chalk will fly in the air, which not only affects the respiratory health of teachers, but also affects students within a certain range. According to the statistics of the relevant national report in 2000: Teachers and students inhale about 200 grams of chalk dust per person every year in class, and suffer from about 20% / year of respiratory tract, lung diseases, and cancer. [0003] In the prior art, there are many improvements to the blackboard eraser, but usually the mechanical precision is too high,...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are many improvements to the blackboard eraser, but usually the mechanical precision is too high, or the maintenance cost of the product is too high and the waste of power resources is too much, and the blackboard eraser as a constant displacement and compact type is not considered. Components are likely to affect the internal structure when the hand shakes greatly, thereby reducing the practical efficiency of the blackboard eraser, and some large blackboard erasers are irreplaceable, and at the same time, the internal precision is high, which will also affect the self-maintenance ability It has a high level of requirements, and the traditional blackboard eraser will cause a lot of dust, so it will cause inconvenience to the user during use

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