Patent ID: 6464299
Filing Date: 2002-10-15
Classification: B60N

Abstract:
A vehicle seat comprising a backrest and a seat part, the backrest comprising:a bottom part comprising a support frame which is pivotally mounted on the seat part about a first transverse, horizontal pivot axis, by a pivot mechanism designed to allow a user to adjust an angular position of the backrest relative to the seat part, and a top part pivotally mounted on the support frame about a second transverse, horizontal pivot axis parallel with the first pivot axis, the top part of the backrest being linked to the support frame by a first locking mechanism designed to link the top part of the backrest to the support frame at least in an angular position of normal usage, the first locking mechanism being controlled by a first operating member in order to release the top part of the backrest so that said top part can rotate about the second pivot axis, at least so that said top part can be folded forward from the normal usage position as far as a flat position in which said top part is disposed substantially horizontally, wherein the support frame is linked to the pivot mechanism through an intermediate frame pivotally mounted relative to the seat part about the it pivot axis, the intermediate frame being linked to the seat part by the pivot mechanism, wherein the support frame is linked to the intermediate frame by a second locking mechanism, said second locking mechanism being controlled by a second operating member which can be displaced between, firstly, a locked position in which said second locking mechanism immobilizes the support frame relative to the intermediate frame and, secondly, an unlocked position in which the second operating member releases the second locking mechanism enabling the support frame to pivot freely relative to the intermediate frame about the first pivot axis, wherein the second operating member is linked to the top part of the backrest by a mechanical coupling device which is designed to displace the second operating member into the unlocked position when the top part of the backrest is in the flat position and to enable the second operating member to be placed in a locked position when the top part of the backrest is in said position of normal usage, and wherein the top part of the backrest is designed to co-operate with the seat part when said top part is in a flat position in order to restrict the forward folding movement of the top part of the backrest.