Vacuum electric blackboard eraser

Abstract

The invention discloses a dust-absorbing electric blackboard eraser, which is composed of three major components: a blackboard eraser, a preparator and a dust collecting box. The blackboard eraser consists of a miniature low-voltage motor (1), a brush (9), an ultrasonic transmitter (2), a suction port (8), an airflow pipe (5), an air inlet (7), and a manual switch (12) And automatic switch (24) forms. The preparer includes an electromagnetic switch and an automatic hose reel (13). The dust collector is composed of a dust collection cup (23), a blower fan (19), a motor (20), a conical filter screen (17) and a cylindrical filter screen (16). The use of electric vacuuming allows a large amount of dust to be sucked into the dust collection box, which effectively curbs the escape of dust and is conducive to the healthy work of teachers. During daily cleaning, it is only necessary to pour out the dust in the dust collection box, which is very easy clean.

Description

technical field [0001] The invention relates to a blackboard eraser, in particular to an electric blackboard eraser. Background technique [0002] Blackboard eraser is an essential tool for classroom teaching. In the prior art, blackboard eraser has many shortcomings, and the one, because occupy dust on the cotton cloth of blackboard eraser, be difficult to clean blackboard, have reduced the sharpness of writing on blackboard. The 2nd, because after the blackboard eraser occupies dust on the cotton cloth, the dust flies around when wiping the blackboard, which has a bad influence on students and teachers, especially if the teacher has been in this environment for a long time, the dust is extremely easy to damage the throat and lungs. [0003] Among the existing new-type blackboard erasers, there is a water injection type blackboard eraser. Although the water absorbs dust, the strength is small and there is no water, and the water overflows. Although the portable electric b...

AI Technical Summary

Problems solved by technology

In the prior art, the blackboard eraser has many shortcomings. The first is that it is difficult to wipe the blackboard after occupying the dust on the cotton cloth of the blackboard eraser, which reduces the clarity of writing on the blackboard.

The second is that after the blackboard eraser occupies the dust on the cotton cloth, the dust will fly around when wiping the blackboard, which has a bad influence on students and teachers, especially if the teacher has been in this environment for a long time, the dust is extremely easy to damage the throat and lungs

[0003] Among the existing new blackboard erasers, there is a water-filled blackboard eraser. Although the water absorbs dust, the force is small and there is no water to absorb the dust. The force is large and the water overflows.

Although the portable electric blackboard eraser is small and portable, but due to the small size and insufficient components, it cannot prevent dust from entering the motor, causing damage to the motor, low life and frequent charging

The roll-cloth blackboard eraser improves the cleaning ability by constantly changing the cloth, but it is cumbersome and unsustainable to replace the cloth roll all the time

Images