An apparatus for fastening a constructional element to a...

G - Physics – 02 – C

Patent

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G02C 1/02 (2006.01)

Patent

CA 2474084

Disclosed is a device for fixing a structural part (1) to an eyeglass lens (2), comprising an end bridge (8) of the structural part (1), which overlaps the edge of the lens, two parallel fixing pins (4) which protrude from the end bridge (8) and form barb-type annular rings at the cross section thereof, and plastic shells (6) which form a head, can be inserted into boreholes (3) of the eyeglass lens (2), overlap the edge of the borehole, and into which the fixing pins (4) engage in a form-fitting manner from the side of the borehole that faces the heads, the wall of the shell being deformed. In order to create advantageous construction conditions, the end bridge (8) comprising the two fixing pins (4) is made of plastic, the two plastic shells (6) are connected to each other via a common stop head (7), and the elasticity module of the plastic of the fixing pins (4) represents at least three times the elasticity module of the plastic of the plastic shells (6).

L'invention concerne un dispositif de fixation d'un élément de construction (1) sur un verre de lunettes (2), comprenant une barrette d'extrémité (8) de l'élément de construction (1), deux tiges de fixation parallèles entre elles, à distance de la barrette d'extrémité (8), présentant, en coupe transversale, des renflements annulaires du type barbelé (5), et des manchons en matière plastique (6) insérables dans des trous (3) du verre de lunettes (2) et formant une tête recouvrant le bord de ces trous, manchons dans lesquels s'engagent, par liaison de forme et par déformation de la paroi du manchon, les tiges de fixation (4) à partir du côté du trou opposé aux têtes. En vue de disposer de conditions de construction avantageuses, l'invention est caractérisée en ce que la barrette d'extrémité (8), avec les deux tiges de fixation (4), est en matière plastique, en ce que les deux manchons en matière plastique (6) sont reliés entre eux via une tête de butée commune (7), et en ce que le module d'élasticité de la matière plastique des tiges de fixation (4) correspond à au moins trois fois le module d'élasticité de la matière plastique des manchons (6).

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