A release device for the upper rail and the lower rail of a longitudinal seat adjustment system of a motor vehicle seat, the release device having a lever rotatably supported on the upper rail of the seat. An end of the lever interacts with the locking means and optionally releases the locking means. A handle is provided at the other end. If the handle is operated, the lever moves relative to the upper rail from a passive position to a release position and moves the locking means from a locking position to a releasing position. So the release device automatically moves into a passive position of the release device, a spring element is provided, which preloads the lever into the passive position of the lever. The spring element additionally supports the lever on the upper rail.

A seat sliding device includes a lever member, a lock member, a biasing member and an operation member. The biasing member is formed of a bar-shaped member and includes a front acting portion configured to come in contact with the front end of the lever member to bias the front end of the lever member upward, a rear acting portion configured to come in contact with the rear end of the lever member to bias the rear end of the lever member upward, and an intermediate support portion formed between the front acting portion and the rear acting portion and engaged with a engaging portion formed in the upper rail. The engaging portion supports the intermediate support portion at a position rearward of a turning center of the lever member (shaft member).

A track assembly includes a track and a support member connected to and configured move along the track. The support member may include an engagement portion. The engagement portion may be configured to engage the track to limit relative movement between the track and the support member in a loaded state of the track assembly. The engagement portion may be configured not to operatively engage the track or limit movement between the track and the support member in an unloaded state of the track assembly.

A seat track mechanism for a vehicle seat. The seat track mechanism may include an upper track, a lower track, a lever, and a retainer bracket. The lever may be pivotable between a first position and a second position and may have a latch arm. The retainer bracket may define a slot that may receive the latch arm to hold the lever in the second position.

A slide rail for a vehicle seat comprises first and second slide members lockable by a lock which comprises several locking members suitable for entering holes that are part of the first slide member. The lock is mounted on the second slide member so as to provide translational clearance between the lock and the second slide member.

A seat track mechanism for a vehicle seat. The seat track mechanism may include an upper track, a lower track, a lever, and a retainer bracket. The lever may be pivotable between a first position and a second position and may have a latch arm. The retainer bracket may define a slot that may receive a latch arm to hold the lever in the second position.

A slide rail for a vehicle seat comprises first and second slide members lockable by a lock which comprises several locking members suitable for entering holes that are part of the first slide member. The lock is mounted on the second slide member so as to provide translational clearance between the lock and the second slide member.

The present invention discloses a latch for securing a seatback to an elevated rear wall of a vehicle passenger compartment, and in which a striker having a crosswise engaging portion extends rearwardly from the seatback. The latch includes a fixed sector adapted to being mounted to the rear wall. A hook is pivotally supported to the sector, with a slide plate sandwiching the hook between the slide plate and the fixed sector such that upward displacement of the slide plate causes forward pivoting of the hook. Rearward pressing of the seatback and striker causes rearward rotation of the hook to receive the striker, the slide plate being upwardly displaced to cause forward rotation of the hook to disengage the striker.

The present invention discloses a latch for securing a seatback to an elevated rear wall of a vehicle passenger compartment, and in which a striker having a crosswise engaging portion extends rearwardly from the seatback. The latch includes a fixed sector adapted to being mounted to the rear wall. A hook is pivotally supported to the sector, with a slide plate sandwiching the hook between the slide plate and the fixed sector such that upward displacement of the slide plate causes forward pivoting of the hook. Rearward pressing of the seatback and striker causes rearward rotation of the hook to receive the striker, the slide plate being upwardly displaced to cause forward rotation of the hook to disengage the striker.

An apparatus to lock a vehicle seat-rail includes a locking pin to pass through a fixing bracket, and a detachment preventing device to inhibit the locking pin from being detached from the fixing bracket in a direction, while the locking pin moves on the fixing bracket. In particular, the detachment preventing device includes: a catching jaw formed in the locking pin; a guide hole formed in an end of the fixing bracket; and a bush to wrap around the locking pin. The catching jaw is caught the bush and thus the locking pin inserted in the guide hole is inhibited from being detached.