Folding eyeglasses

1 . Folding eyeglasses, comprising a front which supports a pair of lenses and a pair of temples hinged to the front, each one of said temples comprising a proximal portion and a distal portion which are mutually hinged by a hinge, wherein said hinge comprises a multi-jointed central body configured to allow a first 90° rotation of the distal portion of the temple, and a further 90° rotation of the multi-jointed central body with respect to the proximal portion of the temple, in order to arrange the proximal portion of the temple and the distal portion of the temple so that they are mutually parallel and superimposed, wherein said multi-jointed central body of the hinge is interposed between said proximal portion and said distal portion of the temple by the interposition, at each side, of a slider, which is adapted to mate respectively with the proximal portion and with the distal portion of the temple by the interposition of a respective compression spring, said slider being adapted to slide respectively on said proximal portion and said distal portion of the temple and being configured to both slide and rotate with respect to said multi-jointed central body.

2 . The folding eyeglasses according to claim 1 , wherein said multi-jointed central body of the hinge is provided with respective holes which are adapted to mate with holes arranged at ends of said proximal portion and said distal portion of the temple, by respective screws.

3 . The folding eyeglasses according to claim 1 , wherein said multi-jointed central body of the hinge comprises two mutually opposite cam portions which are adapted respectively to rotate about rounded ends of said proximal portion and of said distal portion of the temple, said rounded ends forming the holes of said proximal portion and said distal portion of the temple.

4 . The folding eyeglasses according to claim 1 , wherein said respective compression spring of said distal portion of the temple has a smaller force than said respective compression spring of said proximal portion of the temple.

5 . The folding eyeglasses according to claim 1 , wherein said front comprises a first front portion and a second front portion which are mutually hinged by the interposition of a slider and a spring.

6 . The folding eyeglasses according to claim 1 , wherein said respective compression springs of said distal portion and said proximal portion of the temple are accommodated in a blind cavity formed at said distal portion and at said proximal portion of said temple.

7 . The folding eyeglasses according to claim 6 , wherein said respective compression spring abuts between said blind cavity of said distal portion and of said proximal portion of the temple and the respective slider.

8 . The folding eyeglasses according to claim 1 , wherein the multi-jointed central body of the hinge is a bistable mechanism.

9 . The folding eyeglasses according to claim 8 , wherein said bistable mechanism allows the 180° rotation of the distal portion of the temple with respect to the proximal portion of said temple, by vertical axes of the multi-jointed hinge.

10 . A method for folding folding eyeglasses according to claim 1 , the method including the following steps:

for each one of said temples, starting from an open condition of said eyeglasses, rotating through 90° said distal portion of the temple with respect to said proximal portion of the temple, said multi-jointed central body of the hinge remaining in the normal open position,

rotating further through 90° said distal portion of the temple so as to cause said multi-jointed central hinge body to rotate with respect to said proximal portion of the temple, so as to arrange said proximal portion of the temple and said distal portion of the temple so that they are mutually parallel and superimposed, and

folding the front of the eyeglasses so as to arrange first and second portions of the front so that one is superimposed on another, with said folded temples interposed.