Longitudinal adjuster for a vehicle seat, and vehicle seat

A vehicle seat having a longitudinal adjuster comprising:

• at least two pairs of rails, each pair of rails being formed from a lower rail and an upper rail, wherein the lower and upper rails mutually engage each other and are movable relative to each other in a longitudinal direction;
• two locking devices, wherein the lower and upper rails and are each lockable to each other by means of one of the two locking devices;
• an actuating device for the mutual actuation of the two locking devices, the actuating device comprising a transmission rod arranged between the two locking devices, and a handle, which is connected to the transmission rod, wherein the transmission rod is operatively connected to the two locking devices;
• and
• a spring element acting upon the actuating device with a spring force in a direction of an inoperative position or passive position, wherein the spring element does not protrude over the locking device in a vertical direction and acts upon the transmission rod along a longitudinal extent thereof with a torque relative to the longitudinal direction;
• wherein the spring element lies against the longitudinal adjuster at five contact points and the spring element is supported via the five contact points.