Patent ID: 7658429

Claim:
A vehicle seat slide device comprising: a pair of left and right lower rails adapted to be mounted on a vehicle floor; a pair of left and right upper rails adapted to support a vehicle seat and slidably supported respectively on the lower rails; a left screw feed mechanism provided between the left lower rail and the left upper rail, the left screw feed mechanism including a screw shaft and a nut member screw-engaged with the screw shaft and relatively rotatable for moving the left upper rail along the left lower rail; a right screw feed mechanism provided between the right lower rail and the right upper rail, the right screw feed mechanism including a screw shaft and a nut member screw-engaged with the screw shaft and relatively rotatable for moving the right upper rail along the right lower rail; an electric motor being in driving connection to the left and right screw feed mechanisms and constituting a driving source for effecting relative rotations between the screw shaft and the nut member of the left screw feed mechanism and between the screw shaft and the nut member of the right screw feed mechanism; a transmission mechanism arranged between the electric motor and the left and right screw feed mechanisms and composed of a housing which supports a drive reduction gear mechanism drivingly coupled to an output shaft of the electric motor, a pair of left and right casings which support direction conversion gear mechanisms drivingly coupled to the left and right screw feed mechanisms, and a transmission shaft arranged to pass through an output gear of the drive reduction gear mechanism to be rotatable bodily with the output gear and drivingly coupled at opposite ends thereof to input gears of the direction conversion gear mechanisms; and a bracket secured to either one of the upper rails and the lower rails and supporting the housing and the pair of left and right casings.