Patent ID: 7328699

Claim:
A diving mask having a back-and-forth direction, a transverse direction and a vertical direction being orthogonal one to another, and comprising: a lens unit including one or more lenses formed from a soft and transparent material and located ahead in said back-and-forth direction; a skirt member formed from a soft elastic material and extending rearward from said lens unit; a head-strap member adapted to hold a peripheral edge of said skirt member in close contact with the face of a wearer; said skirt member being formed in a region corresponding to a middle region of said lens unit as viewed in said transverse direction with a nose cover; a drainage mechanism which includes a check valve adapted to be opened toward an outside of said skirt member being formed in a bottom of said nose cover or in a vicinity of said nose cover; said drainage mechanism comprising an inner annulation defining a through-hole adapted to receive a mounting shaft of said check valve, a plurality of drain holes defined around said inner annulation by a plurality of spokes radially extending from said inner annulation and a valve seat extending in a circumferential direction of said inner annulation outside an array of said drain holes and projecting toward said check valve, said valve seat being formed from an elastic material integrated with said soft elastic material forming said skirt member, and an annular member formed from one of a plastic material and a metallic material having a hardness and deformation-resistance both higher than those of the elastic material forming said valve seat being embedded in said bottom of said nose cover in a vicinity of said valve seat so as to extend along said valve seat.