Seat

A seat (1), with at least one seat base part (2) and at least one a backrest part (3), which seat (1) is supported on a seat carrier (4) and is adjustable relative to said carrier (4) by a positioning drive (5, 6), whereby the positioning drive (5, 6) is in controlling connection with at least one body position sensor (12, 13) for advancing or retracting of the at least one seat base part (2) and the at least one backrest part (3) in accordance with the body position assumed by a person on said seat (1) or for the retraction of the at least one seat base part (2) and the at least one backrest part (3) corresponding to a body motion of the person on said seat (1), characterized in that the at least one seat base part (2) and the at least one backrest part (3) respectively are adjustably guided in an enforced guidance, and the seat base part (2) and the backrest part (3) are pivotally connected to one another, by a pivot pin (7) and the seat base part (2) and the backrest part (3) are respectively guided at a distance from the pivot pin (7) and are rotatable about the guide axes or guide pins (8, 9), and that the positioning drives (5, 6) of the seat base part (2) and the seat backrest part (3) are simultaneously activatable, and at least one body position sensor comprising a pressure sensor or a pressure switch (12, 13) is located in at least one of the seat base part and the seat backrest part which activates or stops the positioning drive (5, 6) assigned thereto, dependent upon exceeding or being less than specified pressure loadings.