A kind of lifting transmission mechanism of stair lifting chair of what is closed in the utility model system,Main system include a seat body,One transmission group and one driven group,The seat body system includes the seat portion above a body and the setting what body,Side-line is connected to the speed reducer of the drive motor equipped with a drive motor and one in the what body,The Hou side of one end system protrusion what body of the speed reducer,The transmission system is rotatably coupled one end of what speed reducer protrusion what body Hou side,The driven system can be rotatably set the Hou side of what body,And be presented with the transmission group,Lower interval setting； The utility model system using the transmission group and driven group of one fluctuating orbit of blocking what,The transmission group actuation is driven through the drive motor of the body,To drive the seat body along the elevator actuation.本新型係關於一種樓梯升降椅之升降傳動結構，主要係包括一座椅本體、一傳動組及一從動組，該座椅本體係包括有一機體及一設置於該機體上方的座椅部，於該機體內側係設有一驅動馬達及一連接至該驅動馬達的減速機，該減速機之一端係凸出於該機體之後側，該傳動組係可轉動地連接於該減速機凸出於機體後側的一端，該從動組係可轉動地設置於機體的後側，且係與該傳動組呈上、下間隔設置；本新型係可利用該傳動組及該從動組卡制於一升降軌道，透過該機體之驅動馬達帶動該傳動組作動，以帶動該座椅本體沿著該樓梯升降作動。
