Patent ID: 7047542

Claim:
A disc drive apparatus comprising: a turntable which includes one side surface, another side surface, and a boss provided concentrically on the one side surface, the boss having a rotation center hole, and the another side surface configured to support a disc-like medium concentrically; and a rotary shaft which is inserted and fixed in the rotation center hole of the turntable, and rotates the turntable, wherein, an area of an inner circumferential surface of the rotation center hole of the boss, which is located near to the another side surface of the turntable, is configured as a fitting portion to which a portion of an outer circumferential surface of the rotary shaft, which corresponds to the another side area of the inner circumferential surface of the rotation center hole when the rotary shaft is inserted in the rotation center hole, is pressed to fit; an area of the inner circumferential surface of the rotation center hole of the boss, which is located near to the one side surface of the turntable, is configured to create a clearance which is detached outward from a portion of the outer circumferential surface of the rotary shaft, which corresponds to the one side area of the inner circumferential surface of the rotation center hole when the rotary shaft is inserted in the rotation center hole, in a radial direction of the rotation center hole by a predetermined distance, the clearance being continued in a circumferential direction of the rotation center hole along the one side portion of the outer circumference surface; a large diametrical portion is formed in at least one part of the one side area of the inner circumferential surface of the rotation center hole, the large diametrical portion being expanded more outward in the radial direction of the rotation center hole than the clearance and opened to an outside space; and an adhesive is filled in the clearance and the large diametrical portion.