Patent ID: 7888835

Claim:
A rotating shaft having a plurality of bumps spacedly formed along an outer circumferential surface thereof such that magnetic bodies can be embedded between adjacent bumps, the rotating shaft being characterized in that: the bumps are each formed with two engagement portions extending outwardly and bilaterally and with a deformation space between the engagement portions, the engagement portions undergoing resilient deformation toward the deformation space when subjected to a force, wherein each of the bumps has a frame sectional structure, the tops of the two engagement portions of each of the bumps are connected together to form the frame sectional structure, wherein the bottoms of the two engagement portions of each of the bumps are connected together over the outer circumferential surface, and the two engagement portions are respectively located ay two side edges thereof, wherein recesses are formed on a center section of two sides of each of the magnetic bodies for engaging with the engagement portions to provide a clamping force.