Semi-automatic adjusting saddle for shared bicycle

The invention provides a semi-automatic adjusting saddle for a shared bicycle. The semi-automatic adjusting saddle comprises a saddle body and a supporting rod, the saddle body is arranged at the upper end of the supporting rod, the lower portion of the supporting rod is arranged in a supporting sleeve, and a compression spring is arranged between the lower end of the supporting rod and a bottom plate of the supporting sleeve. A fastening sleeve is fixedly arranged at the upper end of the supporting sleeve, the lower portion of the fastening sleeve is connected with a control sleeve through external threads, and the periphery of the control sleeve is fixedly sleeved with a driven gear. The driven gear is driven by the driving gear at the output end of the gear motor to drive the control sleeve to move up and down, the fastening sleeve is controlled to lock and unlock the supporting rod, and then up-down adjustment of the saddle body is achieved. The semi-automatic adjusting saddle is simple in structure, low