Seat chassis

A seating furniture chassis, comprising:

• a seat surface frame having a first lateral edge region;
• first and second armrests with respective first and second pivot points defining a pivot axis;
• a backrest frame connected to the first and second pivot points and pivotable about the pivot axis, and connected to the seat surface frame below the first and second pivot points;
• a translation mechanism;
• a drive mechanism arranged below the first lateral edge region of the seat surface frame, wherein the drive mechanism is connected to the backrest frame by the translation mechanism and configured to trigger a translation of the translation mechanism to cause a pivoting movement of the backrest frame about the pivot axis such that the seat surface frame is moved translationally;
• guide members arranged below the first and second armrests, wherein the guide members include an elongated, curved portion having a direction of curvature extending lengthwise from the seat surface frame upward to the armrests;
• and
• guide elements guided on the elongated, curved portion of the guide members to guide the seat surface frame during the translation of the translation mechanism,
• wherein the guide elements, during the translation of the translation mechanism, have a direction of movement which corresponds to the direction of curvature of the guide members.