Patent ID: 7866892

Claim:
A rotator for a head tube of a bicycle comprising a mounting bracket being adapted to mount around the head tube of the bicycle and having a mounting ring being adapted to mount around the head tube and having an external surface; an inner surface; a diameter; a bottom; a mounting channel being formed around the external surface of the mounting ring; a kerf being obliquely formed through the mounting ring to form two inclined edges; an annular flange being annularly formed on and protruding from the internal surface of the mounting ring; and a holding groove being formed around the external surface of the mounting ring below the mounting channel; and two legs being oppositely mounted on the bottom of the mounting ring; a rotating collar being rotatably mounted around the mounting bracket and having a top; a bottom; a chamber being defined in the rotating collar between the top and the bottom and having a diameter; an inner surface; and grease being filled in the inner surface of the chamber; an upper through hole being formed through the top of the rotating collar, communicating with the chamber and having a diameter smaller than that of the chamber; a lower through hole being formed through the bottom of the rotating collar, communicating with the chamber and the upper through hole and having a diameter larger than that of the upper through hole; a mounting channel being formed in the inner surface of the chamber and communicating with the mounting channel of the mounting ring; and multiple balls being mounted in the mounting channels of the mounting ring and the rotating collar to make the rotating collar rotating relative to the mounting ring of the mounting bracket smoothly; and a holding ring being mounted in the mounting ring of the mounting bracket and having an outer surface; and an engaging groove being formed around the outer surface of the holding ring and engaging the annular flange on the mounting ring of the mounting bracket.