Water type self-cleaning mark removing blackboard eraser

Abstract

The invention provides a water type self-cleaning mark removing blackboard eraser. The water type self-cleaning mark removing blackboard eraser comprises a blackboard eraser outer shell, a water box, a collodion ring gasket, flexible transmission shafts, driven shafts, a soft support shaft, a sponge water absorption column and a dropper, wherein the water box is mounted on the upper part of the square blackboard eraser outer shell in an embedding manner; the dropper is mounted on the inner upper part of the blackboard eraser outer shell which is located below the central shaft of the water box through bearings at two sides; the two sides of the dropper are communicated with water in the water box through water pipes; a pair of the driven shafts is mounted on the blackboard eraser outer shell which is located at the two sides of the dropper; a pair of the flexible transmission shafts is mounted at the inner lower end part of the blackboard eraser outer shell; a collodion sleeve ring is coaxially sleeved outside the two flexible transmission shafts respectively; the soft support shaft is also mounted between the two flexible transmission shafts; the collodion ring gasket winds the flexible transmission shafts, the soft support shaft, the driven shafts and the sponge water absorption column; the collodion ring gasket is exposed out of the lower end face of the blackboard eraser outer shell. The water type self-cleaning mark removing blackboard eraser is rational in integral structure, scientific and ingenious in design, overcomes problems existing in the current blackboard erasers perfectly, is a product for replacing the current blackboard erasers, and achieves better competitive force and wider market foreground in comparison with products of the same type.

Description

technical field [0001] The invention belongs to the field of cultural and educational supplies, and relates to a blackboard eraser, in particular to a water-type self-cleaning eraser. Background technique [0002] In modern teaching, although projectors have been widely used, blackboards and chalk are still important tools in teaching, and still have an irreplaceable position in the classroom. When removing the chalk writing on the blackboard, the common eraser with bristles is traditionally mainly used. This common eraser will cause chalk dust to fly in the classroom during use, and not only the desks, hair and clothes are stained. A layer of white powder also emits a special smell, which can easily cause diseases such as chronic pharyngitis, which has brought great harm to the health of teachers and students. [0003] In order to solve the above-mentioned problems of the bristle-type common blackboard eraser, the prior art has adopted many ways to make the blackboard clea...

AI Technical Summary

Problems solved by technology

When removing the chalk writing on the blackboard, the common eraser with bristles is traditionally mainly used. This common eraser will cause chalk dust to fly in the classroom during use, and not only the desks, hair and clothes are stained. A layer of white powder also emits a special smell, which is easy to cause chronic pharyngitis and other diseases, which brings great harm to the health of teachers and students

[0003] In order to solve the above-mentioned problems of the bristle-type common blackboard eraser, the prior art has adopted many ways to make the blackboard clean, and the specific methods are various, but there are many shortcomings in these methods, such as high energy consumption, heavy, inconvenient use or poor dust removal effect Excellent

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