One-way self-locking table leg structure

The utility model provides a one-way self-locking table leg structure, and belongs to the technical field of lifting tables. A one-way self-locking table leg structure comprises a driving pipe for external lifting, a driving structure, a lead screw nut fixing base, a torsional spring base and a torsional spring. According to the utility model, the torsional spring seat with the torsional spring isarranged at the joint of the driving pipe connected with the driving structure and the lead screw nut fixing seat; the torsional spring seat is fixedly connected with the driving pipe; the torsion spring seat is movably connected with the lead screw nut fixing seat; two ends of the torsion spring are respectively fixed on the torsion spring seat and the lead screw nut fixing seat; when the driving pipe drives the torsion spring seat to rotate, the torsion spring can perform contraction or expansion movement on the outer surface of the torsion spring seat, so that braking force can be appliedto the torsion spring seat