Patent ID: 7480927

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, and 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, a downward guide surface is provided at a location lower than a tip end of said pawl portion, said hub body is provided with an upper receiving surface at a position opposed to said downward guide surface, said pawl portion is pressed from above so that said downward guide surface slides along said upper receiving surface and said pawl portion moves inward, and a surface extending downward from the tip end of said pawl portion is a disk holding surface, and said downward guide surface is provided on a side portion of said disk holding surface.