PROBLEM TO BE SOLVED: To provide an easy-to-use and inexpensive dental treatment chair in a simple configuration.SOLUTION: A lifting device of dental treatment chairs comprises: a treatment table 2, a support member 3 vertically moving while supporting the treatment table in a cantilevered state a screw shaft for vertically moving the support member a main guide shaft 5 and a sub guide shaft 6 for guiding the vertical movement of the support member a base 7 and a roof 8 that fix the upper ends and the lower ends of the screw shaft, the main guide shaft, and the sub guide shaft and a plurality of supports 9 that are erected surrounding the screw shaft, the main guide shaft 5 and the sub guide shaft, and the upper/lower ends of which are fixed to the base and the roof.COPYRIGHT: (C)2014,JPO&INPIT【課題】簡素な構造で使いやすくかつ安価な歯科治療用椅子を提供する。【解決手段】治療用台2と、該治療用台を片持ち状態に支持しつつ上下動する支持部材3と、該支持部材を上下動させるネジ軸と、該支持部材の上下動をガイドする主ガイド軸5および副ガイド軸6と、前記ネジ軸、主ガイド軸および副ガイド軸の上下端部を固定するベース7および天盤8と、前記ネジ軸、該主ガイド軸5および副ガイド軸を取り囲むように立設され、かつ上下端が前記ベース及び天盤に固定された複数の支柱9とを備えている。【選択図】図1
