Coupling unit for eyeglass frames, and an eyeglass frame comprising the unit

A coupling unit for eyeglass frames for coupling the eyeglass frame front to the temple, where the coupling unit comprises a subunit of the eyeglass frame front (1) and a subunit of the temple (3), and where the subunit of the eyeglass frame front (1) comprises two pins (2), and the subunit of the temple (3) comprises two sockets (4) in which the said pins (2) are fitted pivotally, and where placed between the said sockets (4) is a resilient element (5) of the subunit of the temple (3) which protrudes beyond the said sockets (4), and placed between the said pins (2) of the subunit of the eyeglass frame from front (1) is a guiding element (6) for the said resilient element (5) of the subunit of the temple (3), wherein the subunit of the eyeglass frame front (1) features an opening (7) to accommodate the resilient element (5) of the subunit of the temple (3) whenever the temple (3) is pivoted away from the folded position with respect to the subunit of the eyeglass frame front (1), wherein, the resilient element (5) of the subunit of the temple (3) passes through the opening (7) from the outside of the subunit of the eyeglass frame front (1) only whenever the temple (3) is pivoted away by any angle larger than 90° from the folded position of the temple (3) with respect to the subunit of the eyeglass frame front (1).