A control mechanism for a chair, the control mechanism comprising: - a base plate configured to be coupled to a chair base assembly, - a support plate configured to be coupled to a chair seat, - an elastic element arranged between the base plate and the support plate, the elastic element enabling the support plate to be tilted with respect to the base plate around a first tilt axis and a second tilt axis different from the first tilt axis, - a control handle configured to be actuated in an actuating direction, - at least one stop element (26A-26D), each stop element of the at least one stop element (26A-26D) being arranged between the base plate and the support plate and configured to limit a minimum distance between the base plate and the support plate at the position of the corresponding stop element (26A-26D), and - a stop element adjust mechanism coupled to the control handle and configured to adjust the minimum distance of each stop element of the at least one stop element (26A-26D) in response to actuating the control handle in the actuating direction, wherein each stop element of the at least one stop element (26A-26D) extends from the base plate towards the support plate and is configured to be separately displaceable between a retracted position and an extended position, wherein, in the extended position, the stop element is further extended towards the support plate than in the retracted position, and wherein a number of stop elements in the extended position depends on an extent the control handle is actuated in the actuating direction, characterized in that the at least one stop element (26A-26D) comprises four stop elements, wherein the control handle is configured to be actuated in the actuating direction in a first handle position, a second handle position and a third handle position, wherein in the first handle position all stop elements (26A-26D) of the four stop elements are in the retracted position, in the second handle position two stop elements (26A-26D) of the four stop elements are in the retracted position and the other two stop elements (26A-26D) of the four stop elements are in the extended position, and in the third handle position all stop elements (26A-26D) of the four stop elements are in the extended position. - a base plate configured to be coupled to a chair base assembly, - a support plate configured to be coupled to a chair seat, - an elastic element arranged between the base plate and the support plate, the elastic element enabling the support plate to be tilted with respect to the base plate around a first tilt axis and a second tilt axis different from the first tilt axis, - a control handle configured to be actuated in an actuating direction, - at least one stop element (26A-26D), each stop element of the at least one stop element (26A-26D) being arranged between the base plate and the support plate and configured to limit a minimum distance between the base plate and the support plate at the position of the corresponding stop element (26A-26D), and - a stop element adjust mechanism coupled to the control handle and configured to adjust the minimum distance of each stop element of the at least one stop element (26A-26D) in response to actuating the control handle in the actuating direction, wherein each stop element of the at least one stop element (26A-26D) extends from the base plate towards the support plate and is configured to be separately displaceable between a retracted position and an extended position, wherein, in the extended position, the stop element is further extended towards the support plate than in the retracted position, and wherein a number of stop elements in the extended position depends on an extent the control handle is actuated in the actuating direction, characterized in that the at least one stop element (26A-26D) comprises four stop elements, wherein the control handle is configured to be actuated in the actuating direction in a first handle position, a second handle position and a third handle position, wherein in the first handle position all stop elements (26A-26D) of the four stop elements are in the retracted position, in the second handle position two stop elements (26A-26D) of the four stop elements are in the retracted position and the other two stop elements (26A-26D) of the four stop elements are in the extended position, and in the third handle position all stop elements (26A-26D) of the four stop elements are in the extended position. wherein each stop element of the at least one stop element (26A-26D) extends from the base plate towards the support plate and is configured to be separately displaceable between a retracted position and an extended position, wherein, in the extended position, the stop element is further extended towards the support plate than in the retracted position, and wherein a number of stop elements in the extended position depends on an extent the control handle is actuated in the actuating direction, characterized in that the at least one stop element (26A-26D) comprises four stop elements, wherein the control handle is configured to be actuated in the actuating direction in a first handle position, a second handle position and a third handle position, wherein in the first handle position all stop elements (26A-26D) of the four stop elements are in the retracted position, in the second handle position two stop elements (26A-26D) of the four stop elements are in the retracted position and the other two stop elements (26A-26D) of the four stop elements are in the extended position, and in the third handle position all stop elements (26A-26D) of the four stop elements are in the extended position.