Patent ID: 7493632

Claim:
A chucking apparatus in which a plurality of pawl bodies are provided in a radial direction of a hub body of a turntable such that said pawl bodies can move, a center hole of a disk is pressed by said pawl bodies to hold said disk, wherein: said chucking apparatus comprises a resilient member for biasing said pawl bodies outward of said hub body, each of said pawl bodies includes a pawl portion which comes into contact with said disk, and a pawl-side stopper for limiting outward movement of said pawl bodies caused by said resilient member, said hub body includes a pawl opening through which said pawl portion can project outward, and a hub-side stopper which abuts against said pawl-side stopper, and a coil spring is used as said resilient member, and an outer end of said coil spring is provided at a location lower than an inner end of said coil spring, wherein said pawl body includes a rear end surface against which the outer end of said coil spring abuts, said rear end surface includes a first surface against which said upper portion of said coil spring abuts and a second surface against which a lower portion of said coil spring abuts, and an angel between said first surface and said second surface is changed such that a boundary portion between said first surface and said second surface becomes a convex portion.