Patent ID: 8646741
Filing Date: 2014-02-11
Classification: B60N

Abstract:
1. A vehicle seat supported such that an upper rail connected to a seat body is capable of sliding in a seat front-rear direction relative to a lower rail fixed at a vehicle body side through a pair of slide guides disposed in a row along the seat front-rear direction, wherein: a separation between a seat front-rear direction central portion of a first of the slide guides and the seat front-rear direction central portion of the second of the slide guides is narrower than half of a maximum slide amount of the upper rail with respect to the lower rail; at least one of the upper rail or the lower rail comprises at least one projection portion projecting out towards the opposing rail side in the vehicle up-down direction at the front end portion or the rear end portion or both the front and rear end portions; a gap is provided between a leading end of the at least one projection portion and the opposing rail such that the gap has a smaller up-down direction dimension than the up-down direction dimension of the at least one projection portion; and the leading end of the at least one projection portion suppresses bowing by making contact with the opposing rail when the upper rail bows towards the lower rail side due to load applied from a seat body side, and wherein: the upper rail comprises a front upper projection portion and a rear upper projection portion disposed further to the seat rear side than the front upper projection portion; the lower rail comprises a front lower projection portion and a rear lower projection portion disposed further to the seat rear side than the front lower projection portion; each of the pair of slide guides comprises a guide body and a ball rotatably attached to the guide body; the upper rail is restricted from sliding towards the seat front side with respect to the lower rail by the guide body of the first slide guide, which is disposed at the center between the rear upper projection portion and the front lower projection portion in a state in which the upper rail is disposed at the center of its sliding range with respect to the lower rail, being sandwiched between the rear upper projection portion and the front lower projection portion; the upper rail is restricted from sliding towards the seat rear side with respect to the lower rail by the guide body of the second slide guide, which is disposed at the center between the front upper projection portion and the rear lower projection portion in a state in which the upper rail is disposed at the center of the sliding range with respect to the lower rail, being sandwiched between the front upper projection portion and the rear lower projection portion, and the at least one projection portion is structured by at least one of the front lower projection portion or the rear lower projection portion.