Helmet for riding vehicle

Claim 1

A helmet for riding a vehicle, having a cap body and a chin covering portion provided in said cap body for covering a chin of a user, said cap body comprising: a main cap body having a large window opened at a lower front end of the main cap body; and an auxiliary cap body forming said chin covering portion and carried on left and right sidewalls of said main cap body for turning movement between a lowered position, in which a lower half of said large window is covered with said chin covering portion to define an upper half of said large window into a small window, and a lifted position, in which said large window is entirely opened, wherein said chin covering portion is provided at a lower edge thereof with an expandable and contractible chin cover for covering a lower face of the chin of the user, and a portion of said chin cover is made of a mesh material of a property permitting an inhalation and exhalation therethrough by breathing of the user, and said chin covering portion also including resilient urging means, operatively connected to said chin cover, for resiliently urging at least a rear edge portion of said chin cover into a contracted state.