Patent ID: 11921358
Assignee: LUXOTTICA S.R.L.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A bistable hinge element for an eyeglasses frame, the bistable hinge element comprises:
a temple cage having a temple bottom extended laterally by two longitudinal side walls which define a housing that opens onto a proximal transverse face through an opening that is U-shaped in cross-section, each one of said side walls having an upper lip extending from said proximal transverse face to an intermediate portion of said housing, said upper lips delimiting a gap the width of which corresponds to the width of said U-shaped opening,
a front cage having a front bottom which is extended laterally by two longitudinal side walls which define a housing that opens onto the proximal transverse face through an opening that is U-shaped in cross-section, each one of said side walls having an upper lip which extends from said proximal transverse face to an intermediate portion of said housing, said upper lips delimiting a gap the width of which corresponds to the width of said U-shaped opening,
said proximal faces having complementary guiding segments, that define sliding surfaces, which are perpendicular to the plane of said gap, said guiding segments of the front cage being extended on the surface of said upper lips by guiding segments, that define sliding surfaces, that extend from one side to the other of said gap, over a length that corresponds to the height of the proximal face of the temple cage, and
a solid body that is elastically deformable along the longitudinal axis, and which has a central portion, with a cross-section corresponding to the transverse cross-section of said U-shaped openings, which is extended at each end by a bulge of a cross-section that is complementary to the transverse cross-section of said housings of the temple and front cages, said bistable hinge element achieving a bistable effect of the temple, keeping said temple in the open or closed position, without freely oscillating from one position to the other.