US Patent 7798637 High-amplitude elastic hinge element for eyeglass frame

An elastic hinge member (10) for spectacles rims, includes a guiding area (22), a slide (30) having a guided part (32) cooperating with the guiding area (22) and a knuckle (31) and a return spring (40). The spring (40) has a compressibility that is sufficient for allowing the guided part (32) to come out of the guiding area (22), and the slide (30) can pivot about the longitudinal axis thereof in order to remain blocked in an “out-blocked” position that facilitates the assembling or disassembling operations of the knuckle with a spigot.