Adjustment device for the longitudinal adjustment of a vehicle seat

An adjusting device for the longitudinal adjustment of a vehicle seat, comprising

• at least one rail for defining a longitudinal seat axis along which a seat base of the vehicle seat is adjustable, and for supporting at least one adjusting unit of the adjusting device, and
• at least two shiftably guided adjusting units arranged one behind the other along the longitudinal seat axis, to which the seat base is to be fixed in order to be adjustable along the longitudinal seat axis,
• wherein the at least two adjusting units are adjustable relative to each other along the longitudinal seat axis, and each adjusting unit is assigned a separate drive for the power-operated adjustment along the longitudinal seat axis.

An adjusting device for the longitudinal adjustment of a vehicle seat, comprising

• at least one rail for defining a longitudinal seat axis along which a seat base of the vehicle seat is adjustable, and for supporting at least one adjusting unit of the adjusting device, and
• at least one shiftably guided adjusting unit adjustable by means of a spindle and a spindle nut meshing therewith, to which the seat base is to be fixed in order to be adjustable along the longitudinal seat axis,
• wherein to the rail a spindle holding member is fixed, on which a portion of the spindle is held and which (a) closes an end of the rail and/or (b) is releasably fixed in the rail via at least one separate fastening element.