Shell Shaped Hinge

The shell shaped hinge attached to the shell pad has an original construction for attaching and it took more than two years from concept to commercialization of product. This hinge is easy to exchange and attach, yet tight when putting on by using the original tool developed for this hinge, which has a really ideal construction for attaching. The way of attaching a pad directly to a frame body is the world 1^st construction which has never been existed in the eyewear history. We obtained the patent (patent no.6039851) in 2016. We have named Shell-Shaped Hinge from the attaching way like to open a shell and its shape.