US Patent 11585934 Cart robot having auto-follow function

A cart robot performing an auto-follow function of following a user, the cart robot, including a storage space storing goods; a main body coupled to a lower portion of the storage space and supporting the storage space; a handle assembly connected to a rear side of the main body; a wheel assembly rotatably coupled to a lower portion of the main body and moving the main body in a direction of force applied to the handle assembly; and a plurality of sensor assemblies provided at front side of the main body for sensing an obstacle in a forward direction and sensing and tracking a location of a transmission module.