Sliding type combined blackboard eraser

Abstract

The present invention discloses a sliding type combined blackboard eraser comprising a lower blackboard eraser body and an upper blackboard eraser body. The upper blackboard eraser body is disposed ina slidable groove frame of the lower blackboard eraser body, and left and right side plates of the upper blackboard eraser body are connected to pulley grooves in the slidable groove frame via pulleys. An upper side of the slidable groove frame is connected with an operation handle via base plates. The front end surface of the slidable groove frame is equipped with N-pole magnets. Corresponding positions on a limiting plate of the upper blackboard eraser body are provided with S-pole magnets corresponding to the N-pole magnets. The bottom of the upper blackboard eraser body is provided with an upper hairbrush, and the top side surface of the upper blackboard eraser body is equipped with a handle cloth strip. The bottom of the lower blackboard eraser body is connected with a lower hairbrush plate via a hairbrush groove seat, left and right side surfaces of the lower hairbrush plate are connected to locking grooves of the hairbrush groove seat via locking rods, and the bottom of the lower hairbrush plate is equipped with a lower hairbrush. An outer edge of a lower side plate of the lower blackboard eraser body is provided with a dustproof cloth strip ring. Scattering of chalk dust can be reduced.

Description

technical field [0001] The invention relates to the technical field of teaching tools, in particular to a sliding combined blackboard eraser. Background technique [0002] In modern teaching equipment, teaching aids are the general term for all kinds of utensils used by students to intuitively and visually understand the teaching content and the utensils used by teachers in teaching. Teaching aids for short. Teaching aids can improve students' interest in learning, enrich perceptual knowledge, help form clear concepts, and develop students' observation and thinking abilities. Generally divide common teaching aids, special teaching aids, children's teaching aids 3 classes, but in the prior art, the blackboard eraser used in the teaching aids has the following disadvantages: [0003] (1) When the general blackboard eraser wipes the blackboard, it is easy to cause chalk to fly, pollute the working environment of the blackboard, is not conducive to people's use and operation, ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing technical solutions, the present invention provides a sliding combination blackboard eraser, which not only solves the problems caused by ordinary blackboard erasers, but also greatly increases the usability of the blackboard, increases construction efficiency, and provides Greater convenience can not only reduce chalk dust flying, but also reduce the impact of excessive chalk dust accumulated by the brush, and is convenient for people to use, and can effectively solve the problems raised by the background technology

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