| 摘要 |
PURPOSE: A dustproof mask is provided to secure safe use thereof and to rapidly close an exhaust hole opened by the outbreathing of a wearer. CONSTITUTION: A dustproof mask comprises a mask body(110), a purification filter part(120), and an exhaustion flap part. The mask body forms a flap part mounting hole in the center thereof and forms an inhalation flap part in the right and left and covers the mouth and nose. The purification filter part is detachably combined with the inhalation flap part, purifies external polluted air, and flows in the polluted air through the flap part. The exhaustion flap part is equipped to communicate with the exhaustion flap part mounting hole and discharges internal gas outside.
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