Safety lock-out mechanism for use in a sliding vehicle seat

B - Operations – Transporting – 60 – N

Patent

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Details

B60N 2/08 (2006.01) B60N 2/12 (2006.01)

Patent

CA 2191545

A safety lock-out mechanism for use in a vehicle seat comprises a drive pin mounted on the seatback for movement between a initial free position and a retained position. A latch pawl is pivotally mounted on the baseplate for pivotal movement from a first position whereat the latch pawl is permitted to move from its latching position to its unlatching position under the urging by the drive pin, upon coincident respective movement of the drive pin from its initial free position to its retained position, at which retained position the drive pin is releasably latched. A blocking cam is pivotally mounted on the baseplate in progressive frictional contact with the latch pawl, for movement from a first position whereat the latch pawl is permitted to move from its latching position to its unlatching position under urging by the drive pin, to a blocking position whereat the latch pawl is retained in its latching position. A spring biases the blocking cam to its blocking position. A first cable member is interconnected between the blocking cam and a stationary portion of the vehicle seat track. Rearward sliding movement of the vehicle seat from its entry position to its design position causes the blocking cam to move to its first position under the urging of the first cable, thereby permitting the latch pawl to move from its latching position to its unlatching position, upon return movement of the drive pin from its retained position to its initial free position.

Dispositif de verrouillage de sécurité pour siège de véhicule. Le dispositif comprend un ergot d'entraînement monté sur le dossier du siège et pouvant passer d'une position initiale neutre à une position enclenchée. Un cliquet d'arrêt pivotant, monté sur une plaque d'appui, peut pivoter d'une position verrouillée à une position déverrouillée en fonction de l'action simultanée de l'ergot d'entraînement ayant passé de sa position neutre initiale à sa position enclenchée où il est verrouillé de façon non permanente. Une came de blocage pivotante, montée sur la plaque d'appui, est en contact de frottement progressif avec le cliquet d'arrêt, ce qui lui permet de passer d'une première position, où il peut se déplacer entre une position verrouillée et une position déverrouillée sous l'action de l'ergot d'entraînement, à une position de blocage, où le cliquet est maintenu dans sa position de verrouillage. Un ressort pousse sur la came de blocage pour la mettre en position de blocage. Un premier câble est raccordé à la came de blocage et à une partie fixe du rail de fixation du fauteuil du véhicule. Lorsque le siège glisse vers l'arrière pour passer de sa position repliée avancée à sa position normale, il provoque le déplacement de la came de blocage vers sa première position, sous l'action du premier câble, ce qui permet au cliquet d'arrêt de passer d'une position de verrouillage à une position de déverrouillage, à la suite du retour de l'ergot d'entraînement de sa position enclenchée à sa position neutre initiale3.

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