Rail for a vehicle seat and vehicle seat comprising such a rail

1. Rail for a vehicle seat, comprising:

first and second profile sections mounted so as to slide relative to one another in a longitudinal direction and defining a hollow inside space between them,

a lock predominantly arranged within said inside space and movable between

a locked position where said lock immobilizes the first and second profile sections relative to one another, and

an unlocked position where said lock allows the first and second profile sections to slide relative to one another,

a spring blade attached to the first profile section within said inside space and controlling the lock, said spring blade being normally in a rest position where said spring blade leaves the lock in the locked position, and

a control member connected to the spring blade and actuated by a user to elastically deform the spring blade to an unlocking position where said spring blade places the lock in the unlocked position,

wherein the lock is mounted on the first profile section independently of the spring blade and is resiliently biased toward the locked position, and said spring blade comprises a control portion adapted to act on the lock in order to move it toward the unlocked position when the control member is actuated,

wherein the lock is connected to the first profile section by at least one elastic portion resiliently biasing the lock toward the locked position,

wherein said elastic portion is part of the lock and is attached to the first profile section, and

wherein each of the first and second profile sections comprises a web and two side flanges, at least one of the side flanges of the second profile section comprising indentations suitable for receiving the lock in the locking position, the lock being a metal part which comprises:

a locking portion substantially parallel to the web of the second profile section and adapted to selectively engage with and disengage from said indentations, and

a cam portion with which the control portion of the spring blade is adapted to act by pressing to move the lock to the unlocked position by the effect of the cam, the cam portion extending the locking portion toward the web of the first profile section,

said elastic portion extending the cam portion toward the web of the first profile section.

2. Rail according to claim 1 , wherein the control portion of the spring blade is adapted to press on the cam portion in response to user actuation of the control member in order to move the lock to the unlocked position.

3. Rail according to claim 1 , wherein the lock is mounted on the first profile section so as to move in a transverse direction to allow selectively engaging and disengaging said lock relative to said indentations.

4. Rail according to claim 1 , wherein said elastic portion of the lock comprises first and second blades connected by a fold, the first blade extending the cam portion outwardly through a window arranged in the web of the first profile section and the second blade extending from the fold toward the inside space of the rail through said window to an attachment portion fixed beneath the web of the first profile section.

5. Rail according to claim 1 , wherein the lock is pivotally mounted on the first profile section.

6. Vehicle seat comprising at least one rail according to claim 1 and a seating portion attached to the first profile section of said rail.