The lower rail (14) relatively positioned to the upper rail (17), the upper rail (17) is movable relative to the lower rail (14) in a longitudinal direction.

A bearing conforming to the shape of the upper track is interposed between each upper and lower track.

The upper rail (40) is accommodated in the lower rail (10).

A top track includes bolts along a length of the track.

A bearing (70) conforming to the shape of the upper track (44) is interposed between each upper and lower track (44, 300).

The lock assembly is mounted between the lower rail and the upper rail.

A track assembly for a vehicle includes an upper track (52) slidably mounted in a lower track (50).

Movement of both the first upper track and the second upper track relative to the lower track results in movement of the seat between a forward position and a rearward position.

This restricts movement of the upper rail 2 with respect to the lower rail 1.

The present invention relates to a seat track for a vehicle and, more specifically, to a seat track for a vehicle, which can prevent the separation of an upper rail when the upper rail slides along a lower rail.

There is provided a track with a generally uniform cross-section and an upper track cover.

An insertion piece can be introduced, from the side in the head rail (5), into at least one lateral end region of the head rail (5) and the respective insertion piece is arranged in the head rail.

A main memory device (58) is provided on the second upper rail (18), and at least one spring unit (52) is provided, which acts upon the first upper rail (16) relative to the second upper rail (18) in the longitudinal direction.

An upper air gap which is formed between the excitation element and the upper track is smaller than a lower air gap formed between the excitation element and the lower track.

A window covering system comprises a plurality of slats located between a head rail and a bottom rail.