Patent ID: 8198772

Claim:
A spindle motor comprising: a rotor support piece rotatably supporting a rotor inserted into one end thereof, the rotor support piece comprising a projecting part and a mounting part, the projecting part protruding from the other end of the rotor support piece, the mounting part having a flat surface formed along a periphery of the projecting part; a base plate having an insertion hole formed therein and having a plurality of support protrusions formed on one side thereof, the projecting part inserted through the insertion hole, the support protrusions supporting the mounting part along a periphery of the insertion hole; and a buffer member interposed between the rotor support piece and the base plate to absorb vibration, the buffer member having a projecting-part hole and support-protrusion holes formed therein, the projecting part inserted through the projecting-part hole, the support protrusions inserted through the support-protrusion holes, wherein the support protrusion has a protrusion cavity therein, the protrusion cavity opening towards another side of the base plate, and an end portion of the projecting part is partially pressed into the protrusion cavity.