Earstem for eyeglasses

G - Physics – 02 – C

Patent

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Details

G02C 5/14 (2006.01) G02C 3/00 (2006.01)

Patent

CA 2045119

Earstems (20) for eyewear are configured to define a lateral distance between the earstems which is greater than the width of the head in the anterior temple region so as to prevent any contact of the earstems and the head in that region. Preferably, the earstems include a diverging section (22), a transition section (24), a converging section (26) and a retaining section (28), wherein the transition section defines the greatest lateral distance between the earstems. The retaining section extends posteriorally from the converging section so as to provide an interfacing surface between the eyewear and the head. The retaining section may be configured so as to accommodate the traction device so as to enhance the retention of the eyewear about the head by increasing the coefficient of static friction between the eyewear and the head.

Branches (20) pour lunettes, configurées de manière que soit définie, entre les branches, une distance latérale supérieure à la largeur de la tête dans la région antérieure des tempes, de manière à empêcher tout contact des branches avec la tête dans cette région. Dans leur configuration préférée, les branches comprennent un tronçon divergent (22), un tronçon transitoire (24), un tronçon convergent (26) et un tronçon de retenue (28); le tronçon transitoire définit la plus grande distance latérale entre les branches. Le tronçon de retenue se prolonge postérieurement à partir du tronçon convergent, de manière à assurer une interface entre les lunettes et la tête. Le tronçon de retenue peut être configuré de manière à recevoir le dispositif de traction pour améliorer la retenue des lunettes autour de la tête en accroissant le coefficient de frottement statique entre les lunettes et la tête.

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