Patent ID: 8756618

Claim:
A motor comprising: a rotor case having a chucking device, on which a disk is mounted, press-fitted and coupled thereto; disk support members mounted on an upper surface of the rotor case to support a bottom surface of the disk, and having each of flow path portions therebetween allowing for airflow in a space between the disk and the rotor case; and a push portion disposed in at least one of the rotor case and the disk support members to accelerate the airflow through the flow path portions when the rotor case rotates, wherein the push portion comprises a plurality of recesses spaced apart from each other in the upper surface of the rotor case in a circumferential direction thereof, wherein the push portion is disposed inwardly in the radial direction of the flow path portion so as to form an annular ring shape, wherein the push portion is formed to be depressed downwardly in an axial direction from the upper surface of the rotor case, and wherein the plurality of recesses of the push portion are disposed inwardly of the disk support members in a radial direction while being individually disposed between the flow path portions spaced apart from each other.