Device for changing bridges, side arms and browbars of rimless spectacles, and for changing bridges and side arms of metallic and plastic spectacle frames

摘要

In exchangeable spectacle frames, in which the side arms and bridge are fastenedto the lenses or central part of the spectacle frame by a support element, the supportelement is a rod-shaped, rail-shaped or plate-shaped metal part with a metallicthreaded pin and an additional metallic positioning pin or threaded pin. Themetallic or plastic end of the side arm on the side of the lens, or the connectingelement between the support element and metallic or plastic side arm, is shapedwith recesses which are adapted to the form of the support element, have the samelength as the metallic part and engage the metallic part. The recesses in the sidearm form at least two catches on the lateral, inner plastic interfaces which interactwith the threaded pin and positioning pin. Alternatively, the side arms or bridgesare made of an elastic material with a slit-shaped recess, in which recesses arelocated for form-fittingly receiving the pins of the support element and lockingthem after their insertion.