Slide Structure of Vehicle Seat

摘要

An object of the present invention is to provide a slide structure of a vehicle seat which is capable of always and reliably keeping a fitting relationship between movable and stationary rails. There is provided a slide structure of a vehicle seat comprises a stationary outer rail which is fixed on a vehicle floor and extends in a longitudinal direction of a vehicle, a movable inner rail which fits with said stationary outer rail and is slidable in the longitudinal direction of the vehicle relative to said stationary outer rail and is fixed on a seat cushion and on a rear end portion of which a belt buckle for a passenger is fixed, and means for locking said movable inner rail which locks said movable inner rail against said stationary outer rail in the longitudinal direction, said movable inner rail includes a movable side surface extending in the longitudinal direction of the vehicle to form a substantially C-shaped cross section, said stationary outer rail includes a stationary side surface extending in the longitudinal direction of the vehicle to form a substantially C-shaped cross section, said movable inner rail fits with said stationary outer rail in such a way that opening portions formed by the respective C-shaped cross sections faces each other, a retainer extending in the longitudinal direction is provided between said stationary outer rail and said movable inner rail, said retainer includes a retainer side surface portion extending in the longitudinal direction to form a substantially C-shaped cross section, said retainer includes a retaining portion for retaining said ball, whereby said movable inner rail can be moved in the longitudinal direction along with said retainer relative to said stationary outer rail by said ball rolling between said stationary outer rail and said movable inner rail, said movable side surface, said stationary side surface and said retainer side surface portion are all disposed along the vertical direction of the vehicle, whereby each of said stationary outer rail and said movable inner rail is arranged to form a vertically elongated cross section, said movable inner rail includes a first arcuate cross sectional groove, said stationary outer rail includes a second arcuate cross sectional groove, a guiding groove for guiding the ball in the longitudinal direction is formed by said first arcuate cross sectional groove and said second arcuate cross sectional groove.