Patent ID: 6244704
Filing Date: 2001-06-12
Classification: G02C

Abstract:
A shelter frame for attaching to a primary spectacle frame having two primary lenses and a bridge connected therebetween, wherein said shelter frame comprises:a pair of shelter lenses each of which has an inner side facing with each other;a pair of connecting members which are provided at said two inner sides of said two shelter lenses respectively; andan adjustable bridge arrangement connected between said two shelter lenses together for supporting said two shelter lenses apart and defining a bridge distance between said two shelter lenses, wherein said bridge distance is normally longer than a distance between said two primary lenses of said primary spectacle frame, wherein said adjustable bridge arrangement comprises at least one compression unit comprising a tubular sleeve member having two end openings, a first and a second pusher slidably disposed in said sleeve member, a resilient element positioned between two inner ends of said first and second pushers, and two end stoppers provided at said two end openings for retaining said first and second pushers inside said sleeve member, thereby said adjustable bridge arrangement is adapted for enabling said adjustable bridge arrangement to be compressed to contract said bridge distance in order to mount said shelter frame on said primary spectacle frame by attaching said two connecting members to two inner edges of said primary lenses of said primary spectacle frame respectively, moreover said contracted adjustable bridge arrangement provides an urging force to press said two connecting members outwardly against said two inner edges of said two primary lenses so as to firmly mount said shelter frame on said primary spectacle frame.