Patent ID: 7938488
Filing Date: 2011-05-10
Classification: B60N

Abstract:
1. A device for adjusting the seat depth of a motor vehicle seat, the device comprising: a base element configured to be fixed on a seat framework; a support element mounted longitudinally movable on the base element and configured to support a seat user, wherein during correct use of the support element, a weight of the seat user acts on the support element in a support direction; a guide device configured to guide the support element movably on the base element along an adjustment direction; wherein the guide device comprises a first guide mechanism and a second guide mechanism different from the first guide mechanism for guiding the support element movably on the base element, the reception of the weight of the seat user during use being distributed to one of the guide mechanisms and guidance of the support element being distributed to the other guide mechanism; wherein the support element is supported on the base element in the vicinity of the first guide mechanism and wherein the support element and the base element interact with a predetermined minimum play in the vicinity of the first guide mechanism in a direction of a horizontal transverse axis perpendicular to the adjustment direction and perpendicular to the support direction for providing guidance of the support element on the base element along the adjustment direction with the predetermined minimum play in the direction of the horizontal transverse axis; wherein the first guide mechanism absorbs the weight occurring during use of the device for adjusting the seat depth such that said weight is passed on by the supporting element into the base element and the first guide mechanism has two longitudinal guides which are spaced apart from each other transversely with respect to the adjustment direction and which extend in the adjustment direction; and wherein each longitudinal guide comprises a guide element guided movably in the adjustment direction in a corresponding guide track, the respective guide element being underdimensioned with respect to the assigned guide track in such a manner that there is a predetermined minimum play in the direction of the horizontal transverse axis; wherein the support element is guided on the base element along the adjustment direction with the second guide mechanism in an essentially play-free manner in the direction of the horizontal transverse axis; and wherein the second guide mechanism is configured as a single rail guide which is formed by two guide profiles movable with respect to each other in the adjustment direction and being essentially U-shaped in cross-section; and wherein one of the guide profiles engages with its angled end sections behind sliding guide elements provided on the angled end sections of the other guide profile such that the one guide profile is held with its angled end sections between the angled end sections of the other guide profile and the sliding guide elements, the two guide rails being braced against each other by the sliding guide elements.