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Pickup unit and disk drive unit provided with such a pickup unit

A pick-up unit and actuator technology, applied in the configuration/installation of the head, protection of the transducing head, instruments, etc., can solve the problem of reducing the dynamic characteristics of the suspended lens holder and achieve the effect of preventing collisions

Inactive Publication Date: 2006-12-20
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relatively heavy magnetic mass severely degrades the dynamic characteristics of the suspended lens holder

Method used

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  • Pickup unit and disk drive unit provided with such a pickup unit
  • Pickup unit and disk drive unit provided with such a pickup unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The figures show an embodiment of the pick-up unit according to the invention. The pick-up unit 1 may be used in a device for reading and / or writing data on a disc 2, such as a high-density disc player adapted to read and / or write data by means of optical and / or magnetic means. The input component reads and / or writes high-density disks for audio and / or video. The disk can be rotated about a rotation axis by means of an electronic drive unit (not shown in the figure).

[0017] Data is encoded in one or more layers of the disc 2 used in the disc drive unit described above. Various concepts are known and various forms are suitable for use in connection with the present invention. Data is laid out in digital form in one or more data tracks. The (optical) characteristic variation along the data track contains the data recorded on the disc 2 . To read and / or write data on the disc 2, the disc 2 is rotated by means of a disc drive motor (not shown). The disc 2 is read and...

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PUM

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Abstract

The invention relates to a pickup unit (1) for reading and / or writing data on a disk (2). The pickup unit comprises a base (5), a lens (3) in a lens holder (4) which is suspended from the base (5) and which is movable in at least a focusing direction of the lens (3), a pullback arrangement (9), and / or a locking arrangement (12, 12'). The pullback arrangement (9) and the locking arrangement (12, 12') are adapted to act on the lens holder in order to prevent collisions between the lens (holder) and the disk, the pullback arrangement (9) is adapted to pull the lens holder (4) into an inoperative position remote from the disk, while the locking arrangement (12, 12') is adapted to subsequently lock the lens holder in the inoperative position. In this manner collisions due to strong external mechanical forces or pulses exerted on the pick up unit can be effectively prevented.

Description

technical field [0001] The invention relates to a pick-up unit for reading and / or writing data on a disc. Background technique [0002] Pick-up units of this type are known in many embodiments and generally comprise a lens in a lens holder, a base and a suspension for suspending the lens holder from the base, the suspension enabling the lens to The frame moves relative to the base at least along the focusing direction of the lens under the action of the focusing actuator. To read and / or write data on a disc, a lens is moved along the surface of the disc while the disc is rotating. The development of discs such as DVDs with increased data capacity has made it increasingly necessary to have a very small operating distance between the lens and the disc surface (eg less than the travel of the lens holder relative to the base). A small operating distance carries the risk of an undesired collision between the lens (holder) and the disc, especially when strong external mechanical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/12G11B7/09G11B7/085
CPCG11B7/1201G11B7/0935G11B7/085G11B7/0946G11B7/0933G11B7/121G11B7/09
Inventor H·R·M·弗伯尼I·F·赫尔维根M·梅弗塔哈
Owner KONINK PHILIPS ELECTRONICS NV