This creation is a rehabilitation machine with a base and a lifter. The base has a support bar extending upwards. The base is connected to a first seat. The support bar has a slide rail. The lifter is slid on the slide rail. The lifter has Differential unit, another operating rod is placed between the lifter and the differential unit. The two ends of the operating lever are exposed on the two sides of the lifter respectively. The operating lever is connected to the slide rail by the differential unit, and the force is applied to the operating lever. Rotate it to control the lowering and ascending of the lifter. In addition to rotating the operation lever by hand to move the arm, the lifter can be used to increase the amount of shoulder joint movement to further exercise the muscles around the shoulder.本創作為一種復健機，具有底座、升降器，底座有朝上方延伸之支撐桿，底座相連有第一座椅，支撐桿具有滑軌；升降器，其滑設於滑軌，升降器具有差速機組，另有操作桿穿設於升降器以及差速機組，操作桿之二端分別露出於升降器之二側，操作桿以差速機組組接於滑軌，施力於操作桿並使其旋轉，以控制升降器下降以及上升，除以手旋轉該操作桿可活動手臂外，搭配升降器之升降而增加肩膀關節之活動量，以進一步鍛鍊肩膀周圍之肌肉。
