Environment-friendly backboard eraser

Abstract

The invention discloses an environment-friendly backboard eraser. The environment-friendly backboard eraser comprises a blackboard eraser body. An erasing plate is arranged on the blackboard eraser body. Erasing bristles are arranged on the front face of the erasing plate. A dust sucking device, a circuit board and a storage battery are installed in the blackboard eraser body. The dust sucking device is connected with the circuit board through a wire. The side edge of the blackboard eraser body is provided with a starting switch, an electric quantity display lamp and a charging port, all of which are connected with the circuit board. The circuit board is electrically connected with the storage battery through a wire. A dust storing box is installed on one side of the dust sucking device. The dust storing box is fixed in the blackboard eraser body. A dust sucking opening is formed in the erasing plate. The dust sucking opening communicates with the dust storing box through the dust sucking device. The dust sucking device can be opened while the blackboard eraser is used, the effect of reducing dust is achieved, the teaching environmental is kept sanitary, and diseases of the respiratory system due to flying of dust are avoided.

Description

technical field [0001] The invention relates to a teaching tool, in particular to an environment-friendly blackboard eraser. Background technique [0002] The teaching tools used at home and abroad are still based on traditional blackboard chalk at present. For a long time, this teaching mode of blackboard and chalk will generate a large amount of dust during use, which seriously endangers the physical and mental health of teachers and students, pollutes the teaching environment and destroys teaching equipment. Known blackboard erasers used in the market and schools are basically traditional plastic blackboard erasers, and this blackboard eraser is made of planks and felts bonded together. Although this type of blackboard eraser is light and convenient to use, it has obvious disadvantages: when the felt touches the blackboard surface and rubs back and forth, a large amount of chalk dust will be generated, which will endanger the health of teachers and students, causing teac...

AI Technical Summary

Problems solved by technology

Although this type of blackboard eraser is light and convenient to use, it has obvious disadvantages: when the felt touches the blackboard surface and rubs back and forth, a large amount of chalk dust will be generated, which will endanger the health of teachers and students, causing teachers and students to absorb a large amount of powder and cause respiratory diseases. ; The chalk dust produced is scattered everywhere, which not only pollutes the air but also wastes resources

The latest development on the market is a dust-absorbing blackboard eraser, which uses the principle of a vacuum cleaner to suck the dust generated when wiping the blackboard into the blackboard eraser chamber, but it also has obvious defects: first, it consumes a lot of power. , resulting in a huge power consumption even though it can achieve the vacuuming effect. Second, it is large in size and noisy. Because its dust is directly sucked into the cavity of the blackboard eraser, the volume is huge; the noise generated by the fan is very loud during vacuuming. It will hinder the learning effect of teachers and students in the classroom

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