Resistance-type extending, descending and rotating platform with three shafts and four-bar linkage

The invention belongs to the field of medical instruments, discloses a resistance-type extending, descending and rotating platform with three shafts and a four-bar linkage and aims to arrange a platform which is convenient to operate and time-saving on ultrasonic emulsification equipment. The resistance-type extending, descending and rotating platform comprises a workbench, a first connecting shaft, a four-bar linkage, a second connecting shaft and a third connecting shaft. The upper end of the first connecting shaft is connected with the workbench, the lower end of the first connecting shaft is connected with the front end of the four-bar linkage, the rear end of the four-bar linkage is connected with the upper end of the second connecting shaft, the lower end of the second connecting shaft is connected with the front end of a connecting and supporting piece, and the rear end of the connecting and supporting piece is connected with the upper end of the third connecting shaft. The resistance-type extending, descending and rotating platform is convenient to use and space-saving, and can be folded up when not in use; when the platform is used and unfolded, articles can be placed on the workbench; operators can adjust angle and height of the workbench according to needs during working.