Seat adjustment device and aircraft or spacecraft

A seat adjustment device for an aircraft or spacecraft, comprising:

• a seat rail for connection to a floor;
• and
• a seat connection for connection to a seat;
• wherein a worm is provided which can be actuated to adjust the seat connection relative to the seat rail, wherein the seat rail has teeth and the seat connection supports the worm in a rotatably mounted manner, the teeth meshing with the worm, and the seat rail is configured as a profile with a head portion which comprises the teeth, the seat rail comprising a base portion and the head portion, wherein the head portion has the teeth on its upper side in a vertical direction of the aircraft or spacecraft, and wherein a respective leg of a row of seats is formed in a one-piece construction with the seat connection, the seat connection being adjustable relative to the seat rail;
• wherein the seat connection comprises a seat adapter and an insertion adapter which can be brought into engagement with one another, by the insertion adapter being inserted, at least partially, into the seat adapter in a longitudinal direction of the seat rail, for engagement over the seat rail in a transverse direction of the seat rail;
• and
• wherein the seat adapter engages around the head portion of the seat rail and is configured with a receiving element and the insertion adapter comprises an engagement element which can be brought into engagement with the receiving element and the head portion.