Chucking mechanism, brushless motor having the chucking mechanism, and disk driving apparatus having the brusless motor
AssigneeNidec Corporation
InventorsHitoshi TAKAKI, Yusuke IWAI, Tomoya UCHIMURA, Satoru KURAMOTO
Life of this patent
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Abstract
A tip portion of a claw member is, when the same is at a lowest position, axially above a bottom surface of an upper disk base of a multi-layered disk. By virtue of such configuration, the tip portion will not be caught between the upper disk base and a lower disk base of the multi-layered disk.
Claims12
A chucking mechanism operable to detachably mount thereon a discoid disk including an upper disk base, a lower disk base pasted with the upper disk base and a central opening portion, and rotate the disk in a concentric manner with a predetermined rotary axis, the chucking mechanism comprising:
- a center case arranged above a turn table, including a cylindrical portion which fits the central opening portion of the disk and a top plate covering an upper end of the cylindrical portion;
- an elastic member arranged radially inside the cylindrical portion;
- a plurality of claw members receiving a radial force from the elastic member, radially projecting from the cylindrical portion, and supporting the central opening portion, wherein
- the turn table includes a disk mounting portion on which the disk is mounted,
- a tip portion which is arranged at a radially outermost area of each claw member moves, when the disk makes contact with the chucking mechanism, axially downwardly and radially inwardly, and
- the tip portion is axially above a bottom surface of the upper disk base when the disk is mounted on the disk mounting portion.
A chucking mechanism operable to detachably mount thereon a discoid disk including an upper disk base, a lower disk base pasted with the upper disk base and a central opening portion, and rotate the disk in a concentric manner with respect to a predetermined rotary axis, the chucking mechanism comprising:
- a center case arranged above a turn table, including a cylindrical portion which fits the central opening portion of the disk and a top plate covering an upper end of the cylindrical portion;
- an elastic member arranged radially inside the cylindrical portion;
- a plurality of claw members receiving a radial force from the elastic member, radially projecting from the cylindrical portion, and supporting the central opening portion, wherein
- the turn table includes a disk mounting portion on which the disk is mounted,
- a tip portion which is arranged at a radially outermost area of each claw member moves, when the disk makes contact with the chucking mechanism, axially downwardly and radially inwardly, and
- a distance between the tip portion and a top surface of the disk mounting portion is, when the tip portion is at a lowest position in the axial direction, greater than at least approximately 1.08 mm.
Dependencies are inferred from the claim text.