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Disc driving unit and disc equipment using the same

A technology of a disk drive device and equipment, which is applied to the recording of information on a disk, instruments, magnetic recording, etc., can solve the problems of unsuitable reliability of long life, difficulty in ensuring the length of the bearing 118, etc., and achieves cheap components and assembly. The effect of improving performance and ensuring rigidity

Inactive Publication Date: 2006-11-22
MINEBEA MOTOR MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but, Figure 16 The drop-off preventing mechanism shown is constructed on the lower side of the bearing 118, so it is difficult to ensure the length of the bearing 118 in response to the requirements for miniaturization and thinning, and it is an unsuitable structure for long-life reliability.

Method used

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  • Disc driving unit and disc equipment using the same
  • Disc driving unit and disc equipment using the same
  • Disc driving unit and disc equipment using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0054] figure 1 is a cross-sectional view of the structure of the disk rotation motor of the disk drive device according to Embodiment 1 of the present invention; figure 2 yes figure 1 A perspective view of the stator portion of the motor shown; Figure 3A is expressed in figure 1 In the motor shown, the perspective view of the state before the engaging part of the turntable part and the engaged part of the bearing cover are fitted when they are assembled; Figure 3B is expressed in figure 1 In the motor shown, the perspective view of the state when the engaging part of the turntable part and the engaged part of the bearing cover are inserted and fitted; Figure 3C is expressed in figure 1 In the motor shown, the perspective view of the state where the engaging part of the turntable part and the engaged part of the bearing cover are fitted when they are assembled; Figure 4A and Figure 4B It is a top view showing the state when the engaging part of the turntable ...

Embodiment approach 2

[0078] Figure 5 It is a cross-sectional view showing the structure of a disk rotation motor as a disk drive device according to Embodiment 2 of the present invention.

[0079] Figure 5 The difference between the motor 70 shown as the disk drive device 75 according to the second embodiment of the present invention and the above-mentioned first embodiment is that the motor 70 is formed on the bearing cover which can be engaged with the engaging part 22 of the turntable part 21 in the axial direction. The engaged portion 24 of the first engaged portion on 23 forms a two-layer structure in which another member (hereinafter referred to as a shielding ring 25 ) as a second engaged portion is fitted. Furthermore, a plurality of cutouts are respectively formed on the engaged portion 24 (first engaged portion) of the bearing cover 23 and the shielding ring 25 (second engaged portion) of other components, and the shielding ring 25 can be Dynamic.

[0080] Figure 6A ~ Figure 6E ye...

Embodiment approach 3

[0094] Figure 9 It is a perspective view showing the fitting state of the insulator of the stator core and the shield ring of the disk rotation motor of the disk drive device according to Embodiment 3 of the present invention, and shows only the main part of the engaged portion 33 .

[0095] The third embodiment differs from the second embodiment in that the shield ring 31 is lightly fixed by pressing the lower surface of the engaged portion 33 of the bearing cover with the coil spring 32 . With this configuration, the same effect as that of the second embodiment can be achieved in the disk drive device according to the third embodiment of the present invention.

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Abstract

The disc-driving unit is formed of a rotor having a turntable on which a disc is mounted, a stator having a bearing housing, and a drop-guard mechanism for protecting the rotor from coming out of the stator. On the turntable, a plurality of engaging sections are integrally formed, while on the bearing housing, an engaged section is integrally formed. The engaged section has a plurality of recesses each of which has an opening width wide enough for passing through each of the engaging sections and a plurality of guides for helically guiding the engaging sections into the recesses. A helical engagement of the engaging sections and the engaged section completes the drop-guard mechanism.

Description

technical field [0001] The present invention mainly relates to a disc drive device for rotating discs such as CD (Compact Disc) and DVD (Digital Versatile Disc) discs, and a disc device equipped with the disc drive device. In particular, it relates to a fall-off preventing mechanism for a rotor portion of a motor in a disk drive device. Background technique [0002] Figure 14 , Figure 15 and Figure 16 Each is a cross-sectional view of the structure of a conventional disk rotation motor. That is, in the past, in the disk drive device that requires thinning and miniaturization, the mechanism for preventing the rotor from falling off in the motor constituting the disk drive device has adopted a Figure 14 , Figure 15 and Figure 16 such a structure. [0003] exist Figure 14 Among them, the disk rotation motor is composed of a rotor portion 101 and a stator portion 102 . The turntable portion 103 of the rotor portion 101 has an engaging portion 104 protruding downward...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B19/20
CPCG11B17/028G11B17/0282
Inventor 西方俊之久山浩二池野弘志
Owner MINEBEA MOTOR MFG
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