Patent ID: 9377633
Filing Date: 2016-06-28
CPC Classification: G02C

Claim Text:
1. A resilient hinge device for connecting each arm to a front frame of spectacles in an articulated way, comprising: a tie bar, one extremity of which is attached to the front frame and stands erect from the front frame in a direction in which the arm is axially or longitudinally extended in its open position with respect to the front frame, an opposite axial extremity of the tie bar being articulated to an end portion of the arm facing the front frame about a hinge axis, a resilient member including a body of substantially U-shaped sheet metal with a pair of opposite surface portions facing each other and each extending from a central portion of the resilient member, the resilient member being fitted onto the tie bar through through-openings made in each of the surface portions of that body so that it remains located between the front frame and the end portion of the arm articulated to the tie bar, and a stop member located between the mutually-facing surface portions of the resilient member, the stop member having a through hole housing the tie bar, such that the stop member is held between the surface portions of the resilient member, and acts as means restricting the resilient deformation induced by the arm in the resilient member when the arm is rotated about the hinge axis, wherein one of the surface portions of the resilient member is in supporting contact against the front frame and the other surface portion of the resilient member is in contact with the end portion of the arm to resiliently stress the arm towards preselected angular positions with respect to the front frame when the arm is rotated about the hinge axis, these angular positions including a position in which the arm is open, suitable for wearing of the spectacles, and a closed position of the arm folded back against the front frame and to return the arm to the open position when rotated beyond that position when opened too far with respect to the frame.