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Optical head device

An optical head and lens holding technology, which is applied to optical recording heads, head configuration/installation, optical recording/reproduction, etc., can solve problems such as torsional vibration of the lens holding part 35, and achieve the effect of suppressing resonance

Inactive Publication Date: 2007-01-10
SANKYO SEIKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, if the ribs 36 are provided in order to reduce the thickness of the lens holding part 35, a new problem of torsional vibration occurs in the lens holding part 35.

Method used

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  • Optical head device
  • Optical head device
  • Optical head device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0025] figure 1 (A) and (B) are a plan view and a perspective view respectively showing the structure of the main part of the optical head device according to Embodiment 1 of the present invention. figure 2 (A) and (B) represent respectively figure 1 A partially cutaway perspective view and longitudinal sectional view of the main part of the optical head device shown. exist figure 1 In (B), illustration of electric wires, drive magnets, etc. is omitted.

[0026] figure 1 with figure 2 Among them, the optical head device 1 of this example is used to record and reproduce optical recording media such as CD, CD-R, DVD, etc., and includes: a lens holder 3 that holds the objective lens 2; The fixing member (not shown) of the holder 3; the driving coil 5 for focusing and the driving coil 6 for tracking that are affixed to the lens holder 3; Drive magnets 7,8. A drive circuit (not shown) for driving the coils 5, 6 is disposed on the side of the fixing member, and power su...

no. 2 Embodiment

[0036] image 3 It is a perspective view showing main parts of an optical head device according to Embodiment 2 of the present invention. The basic structure of this example is the same as that of Embodiment 1, so the parts having the same functions are marked with the same symbols and illustrated, and their descriptions are omitted. exist image 3 In , wires and drive magnets, etc. are omitted.

[0037] image 3 Among them, the optical head device 1 of this embodiment is also the same as that of Embodiment 1, and the lens holder 3 includes: a coil holding part 31 that holds the drive coils 5, 6; The lens holding part 35 which holds the objective lens 2.

[0038] In addition, the lens holding part 35 includes, as in the first embodiment, a wide part 356 extending from the coil holding part 31 in a constant width, and an inclined part 357 curved inwardly and inclined sideways at a boundary portion with the wide part 356 ; It has an arc-shaped planar shape with the front en...

no. 3 Embodiment

[0045] Figure 4 It is a perspective view showing the structure of the main part of the optical head device according to the embodiment of the present invention. The basic structure of this example is the same as that of Embodiments 1 and 2, so parts having the same functions are marked with the same symbols and illustrated, and their descriptions are omitted. exist Figure 4 In , wires and drive magnets, etc. are omitted.

[0046] Figure 4 Among them, the optical head device 1 of this embodiment is also the same as Embodiments 1 and 2. The lens holder 3 includes: a coil holding part 31 that holds the driving coils 5 and 6; A lens holder 35 on which the objective lens 2 is held.

[0047] In addition, the lens holding part 35 is the same as the first embodiment, and includes: a wide part 356 extending from the coil holding part 31 with a constant width; an inclined part 357 curved inwardly and inclined sideways at a boundary portion with the wide part 356; and From the bo...

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PUM

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Abstract

Provided is an optical head device for efficiently suppressing the resonance of a lens holder and reducing the weight of the lens holder. In a lens holder 3 of an optical head device 1, a lens holding portion 35 is projected from a coil holding portion 31 for holding driving coils 4, 5 and the lens holding portion 35 is reduced in thickness. The lens holding portion 35 is shaped like a ring so as to concentrate vibrations to vibrations in a focusing direction, the vibrations are suppressed by a first vibration absorbing member 11. Ribs are eliminated from the lens holding portion 35 so as to concentrate vibrations to vibrations in a tracking direction, the vibrations are suppressed by a second vibration absorbing member 12.

Description

technical field [0001] The present invention relates to an optical head device used for recording and reproducing an optical recording medium, and particularly relates to a technique for preventing vibration of an objective lens in the optical head device. Background technique [0002] For example, if Figure 5 (A), shown in (B), CD, CD-R, the optical head device that the optical recording media such as CD-R, DVD etc. record / regenerate usefulness comprise: hold the lens holder 3 of objective lens 2; Support this lens holder 3; 4 electric wires 4; the drive coil 5 for the focus direction and the drive coil 6 for the tracking direction that are fixedly connected to the lens holder 3; . A drive circuit (not shown) for driving the coils 5 and 6 is arranged on one side of a fixing member (not shown) to which the electric wire 4 is fixed, and power supply to the drive coils 5 and 6 is performed using the electric wire 4 as a power supply line. of. [0003] In the past, the lens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/12G11B7/09
CPCG11B7/0935G11B7/0932G11B7/0933
Inventor 和出达贵
Owner SANKYO SEIKI MFG CO LTD