Spindle motor, disc driving apparatus having the same, and production method thereof

A disk drive device, spindle motor technology, applied in the direction of electromechanical devices, electric components, bearings, etc., can solve the problems of increasing production costs, increasing the number of screw-in parts, increasing the number of parts, etc., to eliminate strain and deflection, and suppress hub deformation , Realize the effect of miniaturization and thinning

Inactive Publication Date: 2006-02-15
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to control such strain and deflection, there is also a method of increasing the number of screw-in parts (for example, more than 6 places), but the production cost is increased due to the increase in the number of parts

Method used

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  • Spindle motor, disc driving apparatus having the same, and production method thereof
  • Spindle motor, disc driving apparatus having the same, and production method thereof
  • Spindle motor, disc driving apparatus having the same, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0049] use figure 1 , the spindle motor according to Embodiment 1 of the present invention will be described. figure 1 It is a cross-sectional view showing the right half of the disk drive device having the spindle motor according to Embodiment 1. The left side from the central axis (axis 1a) has the same configuration as the above-mentioned right half, and thus is omitted from illustration.

[0050] figure 1 Among them, the lower end of the shaft 1 is fixed on the base 3 . Fixing of axis 1 to base 3, such as figure 1 As shown, it can be carried out by pressing, bonding, welding, and combinations thereof. Additionally, if Figure 4 As shown, it can also be done with fastening screws. A disk-shaped thrust flange 9 is fixed or integrally processed on the outer peripheral surface of the shaft 1 . The structure of the bearing is, for example, as follows. The bushing 2 has a cylindrical portion 2a, and an annular thrust plate 12 is press-fitted or adhered to the inner pe...

Embodiment approach 2

[0064] use figure 2 , the spindle motor according to Embodiment 2 of the present invention will be described. figure 2 It is a cross-sectional view showing the right half of the disk drive device having the spindle motor according to Embodiment 2. The left side from the central axis (axis 1a) has the same configuration as the above-mentioned right half, so illustration is omitted.

[0065] figure 2 , without setting figure 1 Embodiment 1 shown above differs from Embodiment 1 in that positioning holes 4c are provided, that spring member 21 is provided between the lower surface of clamper 7 and the upper surface of disk 8 , and that bearing jig 22 is provided instead of positioning jig 11 . In other respects, it has the same configuration, and thus redundant description is omitted.

[0066] The spring member 21 is an annular elastic member made of a rubber material or the like, and is provided to protect the surface of the disk 8 from the clamper 7 in addition to absorbin...

Embodiment approach 3

[0073] use image 3 , the spindle motor according to Embodiment 3 of the present invention will be described. image 3 It is a cross-sectional view showing the right half of the disk drive device including the spindle motor according to Embodiment 3, and the left side from the center axis (axis 1a) has the same configuration as the above-mentioned right half, so illustration is omitted.

[0074] image 3 in, replace figure 2 The male thread 4d of the hub 4 and the female thread 7a of the clamper 7 shown in the above-mentioned second embodiment have a shrink fit portion 31 . In other respects, it has the same configuration, and thus redundant description is omitted.

[0075] The shrink-fit portion 31 is formed by heating and expanding the clamper 7 to expand its diameter, fitting it into the outer peripheral surface of the cylindrical portion 4a in this state, cooling it, and fixing the clamper 7 to the cylindrical portion 4a.

[0076] The manufacturing process of the disk...

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Abstract

The present invention provides a small and thin spindle motor in which no uneven pressure is applied to a recording medium when the recording medium is fixed to a hub, a disc driving apparatus having the spindle motor, and a production method thereof. The spindle motor comprises: a sleeve which is supported by a fixed shaft and rotates around a predetermined axis; and a hub provided on an outer peripheral portion of the sleeve, which includes: a tubular portion to be inserted into a central hole of a recording medium having a disc shape, which is coaxial with the sleeve and has a male thread formed on an outer peripheral surface; and a first receiving surface which is connected to the tubular portion and which holds the recording medium to the axis.

Description

technical field [0001] The present invention relates to a spindle motor, a disk drive device having the same and a manufacturing method thereof. Background technique [0002] In recent years, disk drives have been required to be smaller and thinner because they are incorporated into ultra-compact portable terminals such as portable music players and digital cameras. For example, disk drives using disks with a diameter of 1 inch or less are required. A disk drive device uses a spindle motor that rotationally drives a recording medium such as a magnetic disk or an optical disk. As the disk drive device becomes smaller and thinner, the spindle motor is also required to be smaller and thinner. [0003] refer to Figure 7 and Figure 8 , illustrating a conventional disk drive device in which a recording medium is mounted on a spindle motor. Figure 7 It is a cross-sectional view showing the right half of a typical conventional disk drive device having a spindle motor. The part o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/14G11B19/20F16C17/00
CPCG11B19/2009
Inventor 桐山博之岩堀敏之藤野齐冲洋一
Owner PANASONIC CORP
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