US Patent 8636317 Lift chair

A lift chair includes a base, a seat mechanism and a driving module. The seat mechanism includes a back frame, a seat frame, a foot frame and two hand rails. The seat frame is pivotally coupled to the base, and the driving module installed between the base and the seat mechanism drives the seat mechanism to perform a motion with respect to the base, so that if a user wants to stand up, the user can use the support from the seat frame and the back frame as standing aids to stand up successfully.