Patent ID: 7810613

Claim:
A cart braking device, comprising a swivel unit having a wheel frame pivotally connected with a wheel; a shaft unit mounted on the swivel unit, a bearing mounted between the shaft unit and the swivel unit making the swivel unit capable of rotating relative to the shaft unit; and a braking unit disposed inside of the swivel unit and the shaft unit, and comprising a central shaft, an orientation member, a braking member, and a base; wherein a top portion of the orientation member is coupled with the central shaft and a bottom portion of the orientation member has an orientation gear, the central shaft is provided with an elastic piece capable of moving the central shaft upward, a top surface of the braking member has a fixation gear corresponding to the orientation gear and a bottom portion of the braking member has two braking pads, the braking member is disposed inside the base and the braking pads are projected out of a bottom portion of the base, an elastic member is disposed between the braking member and the base and is capable of pushing the braking member away from the base, the base has two pad through-holes for allowing the braking pads to pass through, and the base is assembled in the swivel unit.