Impeller-type centrifugal negative-pressure dust-suction blackboard eraser provided with vibrating pieces used for vibrating brush

Abstract

The invention provides an impeller-type centrifugal negative-pressure dust-suction blackboard eraser provided with vibrating pieces used for vibrating a brush. The impeller-type centrifugal negative-pressure dust-suction blackboard eraser provided with the vibrating pieces used for vibrating the brush comprises a handle shell, a dust-suction middle shell, a dust-removal bottom shell, the brush, apulling-type dust storage box, a motor and an impeller, wherein the dust-suction middle shell is connected with the handle shell; the dust-removal bottom shell is fixed to the outer bottom end of thedust-suction middle shell, and a brush hole and a plurality of dust-suction holes are formed in the bottom of the dust-removal bottom shell; the brush is mounted in the brush hole; the pulling-type dust storage box is movably connected with the dust-removal bottom shell and is arranged in the dust-removal bottom shell in a sleeved mode, and a plurality of exhaust holes are formed in the bottom, opposite to the dust-suction holes, of the pulling-type dust storage box; the motor is fixed in a motor base located at one end of the interior of the dust-suction middle shell; and the impeller is connected to a spindle of the motor and is driven by the motor to rotate to provide an axial negative pressure, so that chalk dust is sucked into the dust-suction holes and then enters the pulling-type dust storage box. A plurality of vibrating pieces used for driving the brush to vibrate are arranged between the dust-removal bottom shell and the impeller.

Description

technical field [0001] The invention relates to a blackboard eraser, in particular to an impeller centrifugal negative pressure dust-absorbing blackboard eraser which utilizes a vibrating plate to vibrate a brush. Background technique [0002] When teaching, teachers often need to write and draw on the blackboard to explain. In a class of 40-45 minutes, they have to wipe it several times. White chalk dust, day after day, inevitably inhales some chalk dust, which brings a huge threat to the health of teachers. At present, the price of electronic whiteboards for teaching promotion is around 5,000. In the case of using projection screens, the cost of replacing large-scale blackboards is very high, and electronic whiteboards cannot be used if the screen is slightly damaged, and because of the habit of writing, continuous Due to factors such as sex, whiteboard electronic pens have not been greatly promoted. At the same time, the serious distress and health problems caused by ch...

AI Technical Summary

Problems solved by technology

At present, the price of electronic whiteboards for teaching promotion is around 5,000. In the case of using projection screens, the cost of replacing large-scale blackboards is very high, and electronic whiteboards cannot be used if the screen is slightly damaged, and because of the habit of writing, continuous Sex and other factors, whiteboard electronic pens have not been greatly promoted

At the same time, the serious distress and health problems caused by chalk dust to teachers have not been effectively resolved so far.

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