Abstract: Disclosed herein is a locking device of a seat track for vehicles. The seat track comprises a fixed rail fastened to the bottom plane of a vehicle body and having pin holding holes, and a movable rail adapted to move along the fixed rail in a state wherein a seat is mounted thereon. The movable rail is adapted to be locked to or unlocked from the fixed rail by making use of the locking device mounted thereto. The locking device comprises operating pins laterally mounted to a side wall of the movable rail by penetrating through pin bracket fixing holes formed at the side wall.

Abstract: A round recliner for a vehicle having three lock gears evenly spaced apart from each other. Each of the lock gears are interposed between a cam and a corresponding lock gear supporting member in such a manner that the lock gears are engaged with a circular inner gear part of a sector gear, wherein the lock gears are turned along the lock gear supporting members so that an outer gear part of each of the lock gears is disengaged from the inner gear part of the sector gear or the outer gear part of each of the lock gears is engaged with the inner gear part of the sector gear, thereby minimizing occurrence of clearances in the recliner and preventing any irregular engagement of the recliner.

Abstract: Disclosed herein is a seat track for vehicles. The fixed rail includes a horizontal bottom fixed piece, a pair of first and second grooves formed by bending both side portions of the fixed piece at a right angle and rounding a center portion of each of the resulting vertical bent portions to have an outwardly convex semi-circular form for allowing balls to be inserted therein, a first end piece formed by downwardly bending a vertical end portion of the second groove by an acute angle, a vertical piece extending upwardly from an upper end of the first groove by a relatively long length, and a second end piece formed by twice bending an upper end portion of the vertical piece at a right angle.