Walking aid

A walking aid, comprising a support frame, with a plurality of support legs disposed at a bottom of the support frame, and omni-directional wheels disposed on the support legs, wherein a buffering structure is further disposed between each support leg and each omni-directional wheel, and the buffering structure comprises a casing for interacting with the bottom of the support leg and an elastic component that is disposed in the casing and fixedly connected to the omni-directional wheel, wherein

• the elastic component comprises a movable shaft inserted in the casing, a limiting movable block that is fixedly disposed at one end of the movable shaft and fixedly connected to the omni-directional wheel, and an elastic element that is disposed between the movable shaft and the limiting movable block,
• a first channel for the movable shaft to pass through is disposed in the casing, the movable shaft is inserted in the first channel, and a butting top surface is disposed on the top of the movable shaft, wherein the butting top surface butts a top surface of the casing,
• a second channel connected to the first channel and a third channel connected to the second channel are further disposed in the casing, wherein a first step-like surface is formed between the second channel and the first channel, a second step-like surface is formed between the second channel and the third channel, and the limiting movable block comprises a movable block that is disposed in the third channel and capable of butting the second step-like surface, and a sleeve that is vertical to the movable block and disposed in the second channel, wherein one end of the movable shaft is fixedly disposed in the sleeve, and a shaft lever of the omni-directional wheel is fixedly disposed in the sleeve.