STEPLESS-LIFTING SEAT

The utility model discloses a stepless-lifting seat comprising a lifting mechanism, a locking mechanism. The lifting mechanism is composed of a second connecting rod and a sleeve pipe which is sheathed on a feet pipe and can glide upward and downward. At least one connecting rod of the second connecting rod can change length. The locking mechanism is composed of a cam wheel arranged on the end of the hinge of the connecting rod and the sleeve pipe, and a clamp which can deform the sleeve pipe and produce a clamp force under the action of the cam wheel. When the seat is turned over downward, the cam wheel is clamped or the clamp is squeezed, the sleeve pipe is deformed and locked to the feet pipe by producing a clamp force to the feet pipe; when the seat is turned over upward, the clamp is loosened, the sleeve pipe restores to the original state and can glide up and down.