The utility model provides a self-cleaning type dust collection blackboard eraser, which belongs to the technical field of
school supplies, and comprises a support shell, a
push switch, a blackboard eraser, a dust collection chamber, a dust filter screen, a fan and a power supply, a containing cavity with a downward opening is formed in the supporting shell. The
push switch is fixedly mounted at the top of the accommodating cavity; the blackboard eraser is fixedly installed at the bottom of the pressing switch, and a
brush of the blackboard eraser protrudes downwards out of the bottom face of the supporting shell. The dust collection chamber is fixedly installed on the supporting shell, and an inner cavity of the dust collection chamber communicates with the containing cavity; the dust filter screen is fixedly mounted at an air outlet of the dust collection chamber, the fan and the power supply are both fixedly mounted on the supporting shell, the fan is used for extracting air in the dust collection chamber from the air outlet, and the power supply, the fan and the
push switch are connected in series through wires. According to the self-cleaning type dust collection blackboard eraser, an operator holds the supporting shell to enable the
brush of the blackboard eraser to abut against a blackboard, due to the fact that the bottom face of the
brush protrudes out of the bottom face of the supporting shell, when the brush makes contact with the blackboard, a certain gap always exists between the supporting shell and the blackboard, and therefore normal work of the blackboard eraser is guaranteed. In the blackboard erasing process, the pressing switch is triggered by pressing the supporting shell, the power source drives the draught fan to rotate, air in the dust collecting chamber is pumped out from the air outlet, instantaneous vacuum is formed in the dust collecting chamber, and due to the fact that the containing cavity is communicated with the dust collecting chamber, dust in the containing cavity can enter the dust collecting chamber along with
airflow; and meanwhile,
airflow outside the containing cavity can enter the containing cavity through a gap between the supporting shell and the blackboard, so that the possibility of dust
diffusion is avoided, and dust entering the dust collection chamber is blocked in the dust collection chamber by the filter screen.