| 摘要 |
A breathing mask includes a shell body, an inner lining mounted behind the shell body, a filtering piece mounted between the shell body and the inner lining, an inner cover mounted behind the inner lining, and a sealing pad coupled with the inner cover. The inner lining has a vent hole and a recess. The inner cover has an air intake and an air outlet.;Ambient air inhaled through a breathing mask user's nasal cavity is introduced into through-holes in the shell body, the filtering piece, the vent hole, and the air intake. Gas exhaled from a mask user's oral cavity is guided into the recess from the air outlet of the inner cover and dissipated via a notch in the recess's bottom. The breathing mask is able to effectively filter harmful substances such as microbes and airborne particles in air inhaled while providing smooth inhalation and exhalation. |
| 主权项 |
1. A breathing mask comprising:
a shell body including a plurality of through-holes therein; an inner lining engaged on a rear side of the shell body and including a plurality of protuberances thereon, with a vent hole formed in the inner lining and in communication with the through-holes of the shell body, with a recess provided in a lower portion of the inner lining, with a notch formed in a bottom of the recess; a filtering piece installed inside the shell body and between the shell body and the inner lining, with the plurality of protuberances of the inner lining resisting the filtering piece; an inner cover engaged with and mounted behind the inner lining, with a insert edge formed around a rear periphery of the inner cover and including a plurality of slots therein, with an air intake opened in the inner cover and being in communication with the vent hole of the inner lining, with an air outlet provided in a lower portion of the inner cover and in communication with the recess of the inner lining, with a valve covered outside the air outlet; and a sealing pad coupled with the inner cover for covering a mask user's mouth and nose, with the sealing pad including a groove in which the insert edge of the inner cover is engaged, with a plurality of convex portions provided in the groove and coupled with the slots in the insert edge. |
