Rotary driving telescopic mechanism

The invention relates to a rotation driving telescopic mechanism in the technical field of driving mechanism design. The rotary driving telescopic mechanism comprises a flange sleeve, a rotating rod, a telescopic rod, a protective sleeve, a positioning pin, a screw head pin shaft and a fastening screwed plug, the flange sleeve comprises a sleeve shell and a flange plate, two countersunk head through holes are formed in the outer wall of the flange sleeve, a screw head pin shaft and a fastening screwed plug are arranged in the two countersunk head through holes respectively, a positioning spring and a positioning ball are sequentially arranged at the inner end of the fastening screwed plug, and two kidney-shaped holes are formed in the shell wall of the other end of the sleeve shell; an inner square hole is formed in one end face of the rotating rod, a first center hole is formed in the other end face of the rotating rod, and a groove, two limiting ball sockets and two spiral grooves are formed in the outer wa