Abstract: A spring hinge for eyeglasses: the glasses including a central part and side pieces, a hinge element comprising at least one hinge eyelet, a spring device interacting with the hinge element, a housing containing a cavity which at least partially accommodates the spring device and the hinge element. The hinge element is arranged in a displaceable manner within the housing. A guide region for the hinge element, and at least one section of the guide region can be arranged outside the cavity.

Abstract: A guiding washer is provided to a spring hinge of eyeglasses. The guiding washer is disposed between a male part and a female part of the spring hinge, which are made of titanium alloy, in such a manner that the washers can't pivot on the female part, and the male part can pivot on the washers. The washers are intended to reduce friction of the hinge's parts against each other when the male part is being pivoted on the female part, thus effectively increasing the smoothness of pivotal movement of the male part when in use.

Abstract: The present invention is about a guiding sheath with spacer for the hinge of eye-glasses, such that the sheath provides low frictional spacer to titanium alloy hinges. Sheath with spacer made from bronze or synthetic rubber with frictional coefficient less than that of titanium alloy can effectively lower the wear and tear at the hinge due to friction, enhance the smooth folding of the hinge, and thus extend the durability of the hinge. In addition to providing spacer, the present invention also provides positioning latch to the active core of the hinge and lateral support to the shaft during displacement, effectively enhances the stability of the shaft during displacement.