This creation relates to the improvement of the rail structure of a stairlift chair, in particular to a structural improvement that enhances the strength of the rail. The stairlift is composed of a seat, upper and lower rails, a support column and a tripod. The lower end of the seat is provided with a gear, which can be fitted with the rail； the rail is a long strip of the upper rail and the lower rail, and can be bent along the corner of the stairs, and the two sides are respectively cut into planes, and A screw hole is provided for screwing on the support column； the top surface of the lower rail is cut with a tooth row for fitting with the gear of the seat. The upper and lower rails are mainly solid metal strips, and the upper end faces of the lower rails are directly cut into the tooth rows. When used, the combination of the rails and the seats can be more stable and has considerable practicability.本創作係有關一種樓梯升降椅之軌條結構改良，特別是指一種能增強軌條強度之結構改良。該樓梯升降椅係由座椅、上下軌條、支撐柱及腳架所組成。該座椅之下端設有齒輪，可與軌條嵌合；該軌條為上軌條與下軌條為長條狀，可隨著樓梯之轉角彎折，其兩側分別切削為平面，並設有螺孔，用以螺固於支撐柱上；下軌條之頂端面切削有齒排，以供與座椅之齒輪相嵌合。該上下軌條主要係為實心金屬條，而於該下軌條上端面直接切削齒排，當使用時，能使軌條與座椅之結合能更加穩固，具有相當之實用性。
