Anti-smog half mask

摘要

The purpose of the notification is an anti-smog mask intended to be used under conditions of high pollination. This half-mask has a skull-shaped outer part (1), with holes permanently connected to the edge ring (2) and straps not shown in the drawing, and a bottom part (3) of the mask, with a shape close to the surface of the part (1),has a n opening whose edges are permanently connected to the exhaust valve (4) through its lower edge (5) The inner diameter of the rim ring (2) compatible with the outer diameter of the exhaust valve body (4) allows the connection and disconnection of both parts and nthe opposite pair of locking elements (6) on the valve body shall prevent accidental disconnection. The half-mask allows quick and convenient replacement of the bottom part (3) of the filter with the outlet valve (4) in case of filter consumption or user change.