Vehicle seat with a catch on one side and with a retaining device

A motor vehicle seat for motor vehicle, the motor vehicle seat comprising a) an underframe, b) a seat carrier that is height-adjustably connected to the underframe through a left rear oscillating crank and through a right rear oscillating crank, c) a catch device for adjusting and locking the angular position of said crank relative to the underframe, which catch device is directly assigned to one of the two rear oscillating cranks, d) a non-rotatable tie bar that joins the two rear oscillating cranks so that they are parallel when the vehicle seat is subjected to normal load, and e) a retaining device having

• a sector gear firmly connected to the other one of the two rear oscillating cranks,
• an engaging piece movably disposed on the seat carrier or on the underframe, which engaging piece is provided with engaging means, devised for engagement with the sector gear, the engaging piece being disengaged from the sector gear when the vehicle seat is subjected to normal load, and
• an actuator disposed for activation when the associated motor vehicle is subjected to a crash load, the actuator being arranged to cause the engaging piece to move into positive mesh with the sector gear, the actuator being activated both for a positive and for a negative acceleration of the vehicle seat in the event of an accident and
• teeth of the sector gear which teeth have flanks located on either side of the teeth, the teeth being oriented substantially radially, during an accident situation, the sector gear being locked in the direction of clockwise rotation and in the direction of anti-clockwise rotation of the engaging piece upon engagement of the engaging piece.