The invention relates to the structural improvement of the foot seat of the rail positioning column of a stair lift chair, especially a new foot seat designer specially used for the rail positioning column of a stair lift chair.The foot base is mainly composed of a clamp frame and a bottom plate. The two sides of the clamp frame have a slope, one end is provided with a hollow slot hole, which can be used for inserting and fixing the positioning column of the rail strip； the bottom of the bottom plate is in the shape of a long plate, one end of which is bent to form an L-shaped side, and the bottom is provided with a plurality of holes for bolt fixation on the stair floor, and a slot hole for containing the positioning column of the rail strip.In this invention, the side of the base of the foot seat can be flush with the vertical end face of the stair to reduce the occupied space； the long plate-like bottom of the base plate can increase its stability； and the locking slot formed by the base plate and the locking frame can fix the positioning column and bear the load weight, and can be applied to the stair floor of various materials, which is more progressive and practical.本創作係有關於一種樓梯升降椅軌條定位柱之腳座結構改良，特別是指一種專門用於樓梯升降椅之軌條定位柱的腳座新設計者。該腳座主要係由卡掣框及底板所組成，該卡掣框兩側邊具有斜度，一端開設有一中空槽孔，可供軌條之定位柱插入固定；而底板之底部係為長板狀，其一端彎折形成一L型側邊，底部則開設有數穿孔以供螺栓螺固於樓梯地板，並具有一供容置軌條定位柱之槽孔。本創作藉由腳座其底座之側邊能平齊於樓梯的垂直端面，以減少佔用之空間；底板之長板狀底部，可增加其穩固性；且藉由底板及卡掣框形成之卡掣槽孔而能固定定位柱並承受所負載之重量，且可適用各種材質的樓梯地板，較具進步及實用功效者。
