Adjustable chair

摘要

The present assembly relates to a wheel chair having a base frame, a seat frame and a back frame, and a control device for rotating the back frame relative to the seat frame. The back frame includes a back support to receive a trunk portion of a user, the back support being displaceable by another control device relative to the back frame. A control unit communicates with the control devices for rotating and for displacing, the control unit being adjustable to vary the displacement of the back support according to the rotation of the back frame to minimize shear forces between the user's trunk and the back support.