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Disk driving motor and chucking mechanism for disk drive apparatus
| Details |
Inventors: Yokouchi, Hideya;
Assignee: Seiko Epson Corporation (Tokyo-to, JP)
Primary Examiner: Denion; Thomas E.
Assistant Examiner:
Attorney, Agent or Firm: Oliff & Berridge
A disk drive apparatus includes a spindle for engagement with a central hole of a disk hub of a magnetic disk, a rotary member fixed to the spindle, a chucking magnet provided on the rotary member for attracting the disk hub, and a chucking lever pivotally provided on the rotary member which comes at its one end into engagement with a drive hole formed in the disk hub to rotate the disk. When the chucking lever is not chucking the disk, the chucking lever is pivotal about its pivot support point within a given angle, but its movement in the axial direction of the spindle is prevented. The pivot support point section is provided with a disengagement preventive lever which acts in relation to the rotary member to prevent the chucking lever from disengaging from the rotary member. |
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DETAILED DESCRIPTION It is an object of the present invention to simplify the configuration of a disk driving motor assembly which includes a disk chucking mechanism, and to decrease the thickness of the disk driving motor assembly as much as possible, thereby making a disk drive apparatus thinner.
To accomplish the foregoing and other objects, and to overcome the shortcomings set forth above, the present invention provides a disk drive apparatus that comprises a spindle for engagement with a central hole of a disk hub made of metal or the like which is provided in a central portion of a disk accommodated in a cartridge.
A rotary member such as, for example, a rotor is fixed to the spindle.
A chucking magnet is provided on the rotary member for magnetically attracting the disk hub.
A chucking lever is pivotally provided on the rotary member, which has a drive pin near one end that comes into engagement with a drive hole (generally of substantially quadrangular shape formed in the disk hub in offset relation to the center thereof) to engage and rotate the disk.
When the chucking lever is not chucking the disk, the chucking lever is pivotal about a support point within a given angle in the radial direction of the motor, spindle and disk, but its shifting in the axial direction of the spindle is restricted (prevented).
A support point section of the chucking lever is provided with a disengagement preventive mechanism that acts in relation to the rotary member to prevent disengagement of the chucking lever from the rotary member.
As will be appreciated, since the chucking lever is pivotal about its support point within a given angle but its shifting in the axial direction of the spindle is prevented, the thickness of the disk drive apparatus can be decreased.
According to one aspect of the invention, the rotary member includes a slot, and the chucking lever permanently protrudes into the slot so that edges of the slot limit movement of the chucking lever in a direction perpendicular to an axial direction of the spindle
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