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Optical mechanism driving device

An optical mechanism and driving device technology, which is applied in beam guiding devices, optics, optical components, etc., can solve the problems of combination deviation, increase in cost of parts, and increase in assembly man-hours, so as to suppress assembly deviation, reduce performance fluctuations, and reduce assembly man-hours. Effect

Inactive Publication Date: 2005-05-11
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional optical mechanism driving device, six rectangular metal plates 103a to 103f must be provided as the contact points on the mirror base 102 side of the six suspension wires 108a to 108f.
Therefore, in the conventional optical mechanism drive device, since six rectangular metal plates were required, the number of parts increased, the cost of parts increased, and the number of assembly man-hours increased.
Moreover, the conventional optical mechanism driving device is manufactured by connecting the suspension wires 108a-108f and the rectangular metal plates 103a-103f, so there are problems of combination deviation and unstable device performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0043] FIG. 1 is a perspective view of an optical mechanism drive device according to this embodiment. figure 2 and image 3 Shown is the axonometric view of the mirror base only. An objective lens 1 for focusing light onto an optical recording medium (not shown) is held on a lens holder 2 . The lens base 2 has a focusing coil 3 , a tilting coil 4 , and a tracking coil 5 on three surfaces adjacent to the surface on which the objective lens 1 is fixed. The focusing coil 3 consists of two coils 3a, 3b ( Figure 4 Shown) structure, installed in parallel on the surface of the mirror base 2. In addition, the tilt coil 4 is composed of two coils 4 a and 4 b with different winding directions, and is superimposed on the focusing coil 3 and installed in parallel. The tracking coil 5 is mounted on the remaining one of the above three surfaces. Furthermore, the mirror base 2 is provided with a movable portion side substrate 6 on a surface parallel to the tracking coil 5 .

[0044]...

Embodiment approach 2

[0058] FIG. 7 is a perspective view of the optical mechanism driving device of this embodiment. Figure 8 and Figure 9Shown is an axonometric view of the mirror mount only. The structure of the lens base 2 is the same as that of the first embodiment, and the objective lens 1 for focusing light onto an optical recording medium (not shown) is held on the lens base 2 . The lens holder 2 has a focusing coil 3 , a tilt coil 4 , and a tracking coil 5 on three surfaces adjacent to the surface holding the objective lens 1 . Further, the mirror base 2 is provided with a movable portion side substrate 6 on a surface parallel to the tracking coil 5 .

[0059] Figure 10 Shown is a plan view of the substrate on the movable part side. On the movable part side substrate 6, six movable part side terminals 8a to 8f for fixing the ends of the six linear elastic bodies 7a to 7f are provided. The movable part side terminals 8a to 8f are arranged in a circular shape, and the center of the c...

Embodiment approach 3

[0066] Figure 12 Shown is the optical mechanism driving device of this embodiment. Figure 13 and Figure 14 Shown is an axonometric view of the mirror mount only. The structure of the lens base 2 is the same as that of the first embodiment, and the objective lens 1 is held on the lens base 2 so as to focus and irradiate light onto an optical recording medium (not shown). The lens holder 2 has a focusing coil 3 , a tilt coil 4 and a tracking coil 5 on three surfaces adjacent to the surface holding the objective lens 1 . Further, the mirror base 2 is provided with a movable portion side substrate 6 on a surface parallel to the tracking coil 5 . However, unlike the lens mount 2 of Embodiment 1, the lens mount 2 of this embodiment has a thin rectangular parallelepiped shape in the focusing direction Fo.

[0067] Figure 15 Shown is a plan view of the substrate on the movable part side. The movable portion-side substrate 6 has a rectangular shape that is short in the focusi...

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Abstract

The present invention provides an optical mechanism drive device, which only uses at least 6 linear elastic bodies to support the mirror base, and can perform 3-axis drive in the focus direction Fo, tracking direction Tk, and tilt direction Ti. An objective lens (1) for focusing light onto an optical recording medium (not shown) is held on a lens holder (2). On the other hand, a support table (10) for supporting the mirror holder (2) is provided on a base (9) serving as a base of the optical mechanism driving device. The optical mechanism driving device of the present invention is a structure in which six linear elastic bodies (7a-7f) of the same length are arranged in a cylindrical shape to support the mirror base (2) on the support table (10). The center of the circle formed by the ends of the linear elastic bodies (7a to 7f) is the point symmetry axis of the ends of the linear elastic bodies (7a to 7f). In addition, the distance between the ends of the adjacent linear elastic bodies (7a-7f) is arranged so as to be exactly the same.

Description

technical field [0001] The present invention relates to an optical mechanism drive device for writing or reading information to or from an optical recording medium such as a DVD, and more particularly to a support and drive mechanism for an optical device. Background technique [0002] As a conventionally known optical mechanism drive device, there is a device described in JP-A-2001-297460. The axonometric view of the conventional optical mechanism driving device disclosed in the above publication is shown in Figure 17 middle. Figure 17 It is an optical mechanism driving device that controls the objective lens 101 by a moving coil method. The objective lens 101 is fixed on the mirror base 102 . Further, six rectangular metal plates 103a to 103c, 103d to 103f are provided on the side surface of the mirror base 102, and print coils (print coil) 104a, 104b are fixed to the other side surfaces. On the one hand, the base 105 is equipped with a suspension frame 105 for support...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/09G11B7/095
CPCG11B7/0932G11B7/0956
Inventor 竹下伸夫矢部实透
Owner MITSUBISHI ELECTRIC CORP