Patent ID: 7581289
Filing Date: 2009-09-01
Classification: G02C,Y10T

Abstract:
1. A spring hinge for glasses wherein the glasses have a central part for holding lenses and side pieces for pivoting with respect to the central part, the spring hinge comprising: a hinge element comprising at least one hinge eyelet; a spring device interacting with the hinge element; a housing containing a cavity, the spring device and the hinge element being at least partially positioned in the cavity, the hinge element being positioned in a displaceable manner within the housing; a hinge part including a guide region including a lateral surface parallel to a lengthwise extent of the hinge element, at least a portion of the guide region positioned outside the cavity; the housing having a protrusion including a side surface positioned to face the lateral surface of the guide region and configured to interact with the lateral surface of the guide region of the hinge part to prevent a rotation of the hinge part.