Spectacle, has axle traversing housing to allow double rotary motion of branches so that branches are made concave by rotating on themselves when branches have convex shape and arranged against facade/frame by folding along specific angle

摘要

The spectacle (1) has branches (4) each connected to an optical/sun facade (2) or a frame (3) by a hinge formed by an articulation (5). Each articulation has a rotational axle (B) perpendicularly/rotatively traversing a housing to allow successive/simultaneous double rotary motion of the branches so that the branches are made concave by rotating on themselves along a rotation of 180 degrees when the branches have a convex shape with respect to a median axis of the spectacle. The branches are then arranged against the facade/frame by folding along an angle of 90 degrees.