Adjustment device for the longitudinal adjustment of a vehicle seat and ancillary locking device for the same

A vehicle seat, in particular a motor vehicle seat, comprising at least one adjustment device (103) for adjustment of the position of the vehicle seat in a longitudinal direction, said at least one adjustment device comprising:

• at least one pair of rails comprising a first, fixed rail (3) and a second rail (5) movably guided in the longitudinal direction (x) relative to the first rail;
• and
• an ancillary locking device (107);
• wherein
• the ancillary locking device comprises a plurality of first locking structures (24, 25) formed on or connected to the second rail (5), and a plurality of second locking structures (36, 37) formed corresponding to the first locking structures and formed on or connected to the first rail (3), and
• the ancillary locking device is not active in a normal mode and, after introduction of forces in the event of a crash, causes an additional locking of the second rail (5) to the first rail (3) by positively locking of the first and second locking structures (24, 25;
• 36, 37) to one another;
• wherein
• the first and second locking structures (24, 25;
• 36, 37) are arranged on both sides of the respective pair of rails and at regular distances (a) from each other in the longitudinal direction (x), wherein
• the first locking structures (24a, 25a;
• 24b, 25b) or the second locking structures (36a, 37b;
• 36b, 37b) are arranged offset with respect to one other in the longitudinal direction (x) on the two sides of the respective pair of rails.

An ancillary locking device (107) for an adjustment device (103) for adjustment of the position of a vehicle seat in a longitudinal direction, said adjustment device (103) comprising at least one pair of rails comprising a first, fixed rail (3) and a second rail (5) movably guided in the longitudinal direction (x) relative to the first rail;

• wherein
• the ancillary locking device (23, 35) comprises a plurality of locking structures (24, 25;
• 36, 37) arranged at regular distances (a) from each other in the longitudinal direction (x)
• wherein the locking structures (24, 25;
• 36, 37) are configured to be arranged on both sides of the respective pair of rails, wherein
• the locking structures (24, 25;
• 36, 37) are arranged on the two opposite sides offset from each other in the longitudinal direction (x).