Disk drive apparatus

• US 20020176351A1
• Filed: 06/24/2002
• Published: 11/28/2002
• Est. Priority Date: 07/19/1996
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Masaki, Kiyoshi, Mihara, Kazuhiro
• Granted Patent: US 6,711,116 B2
• Time in Patent Office: Days
• US Class Current: 720/702
• CPC Class Codes: F16F 15/363 using rolling bodies, e.g. balls free to move in a circumferential direction
• CPC Class Codes: G11B 17/0282 by means provided on the turntable
• CPC Class Codes: G11B 17/0284 by clampers
• CPC Class Codes: G11B 19/2018 Incorporating means for passive damping of vibration, either in the turntable, motor or mounting
• CPC Class Codes: G11B 19/2027 Turntables or rotors incorporating balancing means; Means for detecting imbalance
• CPC Class Codes: G11B 33/08 Insulation or absorption of undesired vibrations or sounds

Abstract

To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member (23) that contains therein a plurality of spherical bodies (24) or a liquid (26) to form a balancer or a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.

Claims

1. A disk drive apparatus for recording or reproducing an interchangeable disk, the apparatus comprising:

a sub-base to which a spindle motor for rotationally driving the one detachable disk is fixed;

a main base on which said sub-base is mounted via an elastic member having a function of absorbing vibration or impact from the outside; and

a balancer which is mounted rotatably and integrally with a loaded disk and having a hollow ring member containing therein a balancing member and having a center axis positioned substantially concentrically with a rotational center axis of said spindle motor, wherein said balancer reduces vibration due to imbalance of the loaded disk.

2. A disk drive apparatus in accordance with claim 1, wherein said disk is driven for rotation at a frequency higher than the primary resonance frequency of wobbling vibrations of said sub-base due to deformation of said elastic member.

3. A motor for a disk drive apparatus for recording or reproducing an interchangeable disk, comprising:

a balancer mounted rotatably in integral fashion with a rotor, and having a hollow ring member containing therein a rotatable balancing member, wherein said balancer reduces vibration due to imbalance of the loaded disk.

4. A motor for a disk drive apparatus for recording or reproducing an interchangeable disk, wherein a balancer having a hollow ring member containing therein a balancing member is mounted in integral fashion with a rotor, wherein said balancer reduces vibration due to imbalance of the loaded disk.

5. A motor for a disk drive apparatus for recording or reproducing an interchangeable disk, wherein a balancer having a hollow ring member containing therein a balancing member is mounted in integral fashion with a spindle shaft, wherein said balancer reduces vibration due to imbalance of the loaded disk.