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Disc device

A disk-shaped, recording medium technology, applied in packaging, instruments, record carrier accessories, etc., can solve problems such as difficulties, failure to obtain optical head output, and disk deformation that cannot increase recording capacity, etc.

Active Publication Date: 2009-05-06
PHC HLDG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the clamp structure of this structure, although it is conceivable to suppress the deformation of the disk to be small, or to suppress the deformation of the disk caused by the change of the ambient temperature to be small, the disk is reliably maintained flat and completely eliminated. Deformation of the disc is very difficult, and in addition, when a small deformation occurs in the disc, depending on the direction of the deformation, there is also a problem of not being able to obtain sufficient output from the optical head
[0021] In addition, in the above-mentioned clamp structure of the conventional disk device, there is a problem that, as the thickness of the disk becomes thinner, the amount of deformation or twist of the disk caused by the clamp becomes large, and the recording capacity cannot be increased. Unable to obtain stable optical head suspension

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0058] For the disk device according to Embodiment 1 of the present invention, using Figure 1 ~ Figure 3 Be explained. figure 1 is a partial cross-sectional view showing a schematic structure of a disk device according to Embodiment 1 of the present invention, figure 2 is an enlarged cross-sectional view showing the clamp structure of the disk device according to Embodiment 1 of the present invention, image 3 It is an enlarged cross-sectional view showing the clamper structure of another disk device according to the first embodiment of the present invention. figure 1 , figure 2 , image 3 In the description of the structure of the conventional disk drive Figure 16 , Figure 17 The same symbols are used for the same constituent elements.

[0059] figure 1 , figure 2 Among them, a disk-shaped recording medium 1 having a hole on the inner peripheral side (hereinafter, the disk-shaped recording medium is simply referred to as a disk) is inserted into a cylindricall...

Embodiment approach 2

[0064] Next, for the disk device according to Embodiment 2 of the present invention, the Figure 4 ~ Figure 7 Be explained. Figure 4 is a partial cross-sectional view showing a schematic structure of a disk device according to Embodiment 2 of the present invention, Figure 5 is an enlarged cross-sectional view showing the clamp structure of the disk device according to Embodiment 2 of the present invention, Figure 6 is a correlation diagram showing the relationship between the distance Rs and the distance Rh formed by clamping the disk, and the warpage amount of the disk, Figure 7 It is an enlarged sectional view showing the clamper structure of another disk device according to Embodiment 2 of the present invention. Figure 4 , Figure 5 , Figure 7 In the following, for the configuration of the disk device described in Embodiment 1 of the present invention figure 1 , figure 2 , image 3 The same symbols are used for the same constituent elements.

[0065] Figur...

Embodiment approach 3

[0083] Next, use Figure 8 ~ Figure 15 A disk device according to Embodiment 3 of the present invention will be described. Figure 8 is a partial sectional view showing a schematic structure of a disk device according to Embodiment 3 of the present invention, Figure 9 is an enlarged cross-sectional view showing the clamp structure of the disk device according to Embodiment 3 of the present invention, Figure 10 is a correlation diagram showing the relationship between the contact point Rh between the clamp member and the disc and the disc and the wheel shaft due to the warping of the clamp disc, and the relationship between the radius of curvature of the warp of the disc, Figure 11A It is a graph illustrating the relationship between the floating amount of the optical head and the gap of the optical head when there is warpage in the disk, Figure 13 is a diagram showing deformation of the disk by the clamp of the disk device according to Embodiment 3 of the present inventi...

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Abstract

There is provided a disc device having a simple cramp structure capable of stably fixing a disc. More specifically, the disc device includes: a hub having a disc insert unit formed by a cylindrical surface at an outer circumference of one end and a disc reception unit formed as a flat unit and rotatably supported; a head having an inner hole to be engaged with the disc insert unit, arranged to oppose to one surface of the disc to flotation-scan the disc and read a signal recorded on the disc or record a signal onto the disc; a disc held by the disc reception unit; and cramp means for sandwiching the disc together with the disc reception unit. The disc reception unit is formed by an inclined plane. Thus, it is possible to define a disc deformation amount and deformation direction caused by the cramping and obtain a stable head flotation amount regardless of the temperature change, thereby preventing generation of distortion of the disc, suppressing lowering of the head output, and improving reliability of the head.

Description

technical field [0001] The present invention relates to a disk device used for reading and writing information. More specifically, it relates to fixing the disk to a hub in a disk device in which an optical head for recording and reproducing is disposed on at least one surface side of a disk-shaped recording medium (hereinafter also simply referred to as a disk) included in the disk device. The upper thin clamp structure. Background technique [0002] In recent years, since the densification of disk devices has been continuously advanced, large-capacity information can be recorded even on disks with a small recording area, and therefore the development of applications for use in disk devices as recording media for mobile devices and the like is being carried out. Development of various technologies. In addition, small size and light weight are of course required as recording media for mobile devices, and low power consumption and shock resistance are also required in terms...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B17/038G11B23/00
Inventor 宫森健一小幡茂雄野田宏充上野善弘
Owner PHC HLDG CORP