A kind of worm screw chair lift,Back cushion rotation extends wobble heads massager,System includes: be pivoted a screw rod on a shell,One inner box portion sets power source and transmission device,Transmission device what screw position is equipped with a nut,Aforementioned nut top surface is equipped with bevel reduction gear set and transmission device interlocks,Connecting transmission outward by transmission device before inner box portion has two massage head groups,Massage head group includes a swing arm and a turntable,Turntable is to center mandrel and top surface is equipped at least one convex ball of massage,Turntable bottom surface sets eccentric jack-post,Swing arm side sets eccentric shaft orifice ring,What bias jack-post must be covered,Swing arm center sets elongated limiting slot,The another side of swing arm sets at least one convex grain of massage,So that power source drives transmission device rotation,So that inner box portion is able to lifting action,And two massage head groups generate rotary massage plus extend wave push away and rub massage.一種蝸桿升降椅、靠墊旋轉延伸搖擺頭按摩器，係包含有：一外殼部上樞設一螺桿，一內盒部設動力源與傳動裝置，傳動裝置於螺桿位置設有一螺帽，前述螺帽頂面設有傘形齒輪組與傳動裝置連動，內盒部前面由傳動裝置往外連接傳動有兩按摩頭組，按摩頭組包括一擺臂及一轉盤，轉盤對正中心軸且頂面設有至少一按摩凸球，轉盤底面設偏心軸柱，擺臂一側設偏心軸孔環，得套於偏心軸柱，擺臂中央設長形限位槽，擺臂另側設至少一按摩凸粒，使得動力源帶動傳動裝置轉動，使得內盒部得以升降動作，而兩按摩頭組產生旋轉按摩加上延伸搖擺的推揉按摩。
