Safety mechanism in a motorised device for opening and...

E - Fixed Constructions – 05 – F

Patent

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E05F 15/00 (2006.01)

Patent

CA 2319682

The invention concerns a safety mechanism for a motorised device for opening and closing a vehicle sliding door, comprising a linear actuator (20, 30) whereof the mobile end is connected, directly, or via a connecting rod (50) with linear displacement, either to the door front edge, or to an internal arm of the door, or to a corresponding support sliding rail of the door. Said safety mechanism comprises a dynamometer (60) with a spring (64) prestressed at a threshold value and an elastic catch (40/42) intervening respectively in the driving force transmission path between the actuator mobile end (30) and the door, and a mechanism (72, 74, 82, 84) transforming a length variation of the dynamometer (60) caused by a load greater than the threshold value into displacement of a cam (84) arranged such that the displacement undoes the connection set up by the elastic catch (40/42) in the transmission path.

L'invention concerne un mécanisme de sécurité pour un dispositif motorisé d'ouverture et de fermeture de porte coulissante de véhicule comprenant un actuateur linéaire (20, 30) dont l'extrémité mobile est reliée, directement, ou au travers d'une biellette (50) de débattement latéral, soit au bord frontal de la porte, soit à un bras interne de porte, soit en un chariot de support de porte en correspondance. Ce mécanisme de sécurité comprend un dynamomètre (60) à ressort (64) précontraint à une valeur de seuil et un crochet élastique (40/42) de liaison respectivement intercalé dans le chemin de transmission de la force d'entraînement entre l'extrémité mobile (30) de l'actuateur et la porte, ainsi qu'un mécanisme (72, 74, 82, 84) transformant une variation de longueur du dynamomètre (60) due à une charge supérieure à la valeur de seuil en un déplacement d'une came (84) agencée de telle sorte que ce déplacement défait la liaison établie par le crochet élastique (40/42) dans le chemin.

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