Patent ID: 6981681

Claim:
An arrangement, comprising: a lower rail mounted to a vehicle-body floor, the lower rail being formed with a plurality of lock openings at predetermined intervals in a longitudinal direction of the lower rail; an upper rail fixed at a lower portion of a vehicle seat, the upper rail being slidably mounted to the lower rail; a bracket fixed to the upper rail; a coil spring; a lock mechanism swingably supported to the bracket, the lock mechanism allowing slide lock of the seat in a desired position, the lock mechanism comprising a lock piece comprising a plurality of lock pawls rotatively biased by the coil spring, the lock pawls being engaged in and disengaged from the lock openings of the lower rail; a first spring protrusion formed with the bracket, the first spring protrusion catching a first end of the coil spring; a lock releasing lever formed with the lock piece of the lock mechanism, the lock releasing lever catching a second end of the coil spring; and a second spring protrusion formed with the lock piece of the lock mechanism, the second spring protrusion being located in the neighborhood of the first spring protrusion, the second spring protrusion catching the first end of the coil spring provisionally.