Simple dust-removing blackboard eraser

The utility model relates to a simple dust-removing blackboard eraser. An eraser body of the blackboard eraser is fixed in a shell, the front side and the rear side of the eraser body are respectively provided with a dust blocking piece, the left side and the right side of the eraser body are respectively provided with a dust removing piece, and the port of each dust removing piece faces the eraser body. The simple dust-removing blackboard eraser is characterized in that each dust removing piece which is provided with a check valve moving back and forth along with the eraser body to be opened and closed timely is magnetic and flexible; while the blackboard eraser is used for erasing a blackboard, the eraser body, the dust blocking pieces and the dust removing pieces make contact with the blackboard, and a small gap is formed between each dust removing piece and the edge of the eraser body surface; each check valve is arranged on the port of the corresponding dust removing piece, provided with a friction extending rod and an inverted hook and elastically arranged; the left side and the right side of the blackboard eraser are respectively provided with a dust removing cavity, and the rear side of the blackboard eraser is provided with a dust collecting cavity. In addition, an elastic body can be arranged between the eraser body surface of the blackboard eraser and a bottom shell, and the dust blocking pieces are arranged to replace the check valves. According to the simple dust-removing blackboard eraser, dust can be effectively controlled in the dust collecting cavity and prevented from flying all around, and development of teaching activities is facilitated.