Reclining seat for vehicle

Abstract

A reclining seat having a backrest adjustable to any desired angle. The backrest is inclinably connected to the rear of the seat cushion. A fixed ring and a rotary ring are provided around an axis about which the backrest pivots. The fixed ring is mounted to the seat cushion and the rotary ring to the backrest. Cam grooves having a V-shaped section are formed in the outer circumferential surface of the fixed ring. Rolling elements are mounted between the cam grooves and a cylindrical inner surface of the rotary ring. With the backrest adjusted to a desired angle, the rolling elements are brought into frictional contact with the cam groove bottoms and the cylindrical surface to lock the backrest. An operating member having a lever is coaxially and rotatably mounted on a cage. By rotating the operating member, the cage is pushed axially by ramps formed on the operating member until protrusions formed on the cage engage in recesses formed in the fixed ring to position the rolling elements in central positions of the cam grooves. In this position, the rolling elements are not in frictional contact with the cylindrical surface, so that the inclination angle of the backrest is adjustable.

Dependencies are inferred from the claim text.