Portable food blender

A portable food blender comprising a food container, a blade set with cutting blades that is set in the said container and can spin, and a container cover set that is on top of the said container and cannot rotate relative to the container, said container cover set comprising an upper surface and a lower surface, further comprising a pivot and a driving unit, said pivot intrudes out from said container cover set's upper side, wherein when the pivot rotates against the container cover set, it drives the driving unit to make the said blade set spin, wherein the pivot is inside on a side of said container cover set and is mounted to the upper surface, wherein said driving unit is mounted on said container cover set's lower surface, wherein there are threads in the round inner surface of said pivot, said driving unit consists of a driving gear, a spinning gear, and a spinning shaft, said driving gear is mounted on the lower surface of said container cover set, fitting into both said threads and the spinning gear, the spinning gear is mounted on the said spinning shaft, said spinning shaft extends outside the lower surface of the said container cover set through the center hole of the said lower surface of the said container cover set, and wherein said spinning shaft is mounted to the said blade set.