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Optical disc drive

A technology of optical disc drive and optical disc, which is applied in the direction of driving/moving the recording head, recording/reproducing with optical methods, and instruments, etc. It can solve problems such as out-of-step and creeping gears, and achieve the elimination of creeping gears or out-of-steps and high reliability , the effect of stable movement

Inactive Publication Date: 2011-08-17
HITACHI CONSUMER ELECTRONICS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At this time, the teeth of the guide feeder push against the helical gear with a certain pushing force, but when a sharp movement acceleration is applied, the teeth of the guide feeder collide with the helical gear, causing creeping or out-of-step between teeth.

Method used

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  • Optical disc drive
  • Optical disc drive
  • Optical disc drive

Examples

Experimental program
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Embodiment 1

[0052] First, the configuration of an optical disk drive device 1 according to an embodiment of the present invention will be described.

[0053] figure 1 It is an exploded perspective view of the optical disk drive device 1 of this embodiment.

[0054] exist figure 1 Among them, the optical disk drive device 1 is a device for recording and reproducing information on a recording surface of a recording medium (hereinafter referred to as a disk) such as a CD, DVD, or BD (Blu-ray Disc) having a diameter of 120 mm and a thickness of 1.2 mm.

[0055] The optical disk drive device 1 that is the object of the present invention is a thin box-shaped device with a width of 130 mm, a depth of 130 mm, and a device thickness of 12.7 mm (or 9.5 mm), and is called a thin type and is equipped in a mobile personal computer. (or ultra-thin) optical disc drive device 1 of the drive.

[0056] The optical disk drive device 1 is constituted by a case formed by assembling a top cover 3 and a bott...

Embodiment 2

[0087] use Figure 7 The case of Example 2 of the present invention will be described.

[0088] Figure 7 It is a figure showing the structure of the guide feeder which has 2nd Example of this invention.

[0089] exist Figure 5 In the structure of the first embodiment shown, there is a groove structure 31 between the two tooth portions 23 of the guide feeder 21, and the groove structure 31 is formed as a curved portion with respect to the two tooth portions 23. The initial bending deformation structure.

[0090] Figure 7 (a) is an example in which the groove structure 31 is applied between the two tooth portions 23 of the guide feeder 21 and on the side of the helical gear 14 . In this embodiment, the curved structure is such that the groove portion 31 is located inside.

[0091] Accordingly, when the guide feeder 21 presses the helical gear 14 , the bending portion is deformed to open by the pressing force, and the two tooth portions 23 apply a pressing force toward t...

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Abstract

In an optical disc drive, a degradation of traveling performance of an optical pickup under hard acceleration or hard deceleration in a random access operation or the like results in a degradation of recording / reproducing performance. Groove structure is provided between two gears of a guide feed provided in an optical pickup, and the groove forms bending structure. Thus, the engagement state between a screw gear and the gears of the guide feed is stabilized. This makes it possible to prevent tooth jumping and step-out from occurring in the gears during the traveling of the optical pickup, achieving stable traveling. In consequence, the recoding / reproducing performance of the optical disc drive can be improved.

Description

technical field [0001] The present invention relates to the movement performance of an optical pickup that occurs during access, and more particularly to an optical disc drive that improves recording and reproduction performance by preventing creep (phenomenon) and out-of-synchronization (phenomenon) of the gear feed mechanism of the optical pickup. Background technique [0002] For stable recording and reproduction in an optical disk drive device, it is necessary to improve the movement performance of an optical pickup driven in the radial direction of the disk. [0003] The drive method of the optical pickup of the thin optical disk drive device is as follows: the helical gear integrally formed with the rotating shaft of the stepping motor meshes with the guide feeder tooth (gear) portion that the optical pickup housing has, and the rotation of the stepping motor , the driving force is transmitted to the optical pickup to move in the radial direction of the disk. [0004]...

Claims

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Application Information

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IPC IPC(8): G11B21/02
CPCG11B7/08582
Inventor 山内良明山崎达也原田望桐原聪二郎西田育雄
Owner HITACHI CONSUMER ELECTRONICS CORP
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