JP2008010115A - Optical disk driving device and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain accurate tangential tilt with a simple structure. <P>SOLUTION: A support frame 13 guided by first and second guide rails 9a and 9b to move back and forth in a disk radial direction is provided with an optical pickup 19. One end of the support frame 13 is supported to rotate around a direction axis line X which is a disk radial direction with respect to the first guide rail 9a and to slide, and the other end of the support frame 13 is provided with a subframe 27 having first and second rotation support parts 23 and 25 for tangential tilt adjustment. A support structure is formed such that the first rotation support part 23 is slid in a longitudinal direction with a play β orthogonal to the axial direction X of the second guide rail 9b. A fixed support structure is formed such that the second rotation support part 25 is fixed by a fixing means after the completion of positioning the support frame 13 in a tangential tilt setting value. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical disk drive device having a tangential tilt function of an optical pickup and a method for manufacturing the same.

  In general, recording / reproduction of optical information is performed by focusing light generated by an optical pickup on a recording / reproducing medium on a recording / reproducing surface of the medium, and recording or reading signals by the optical pickup. Perform playback.

  When recording and reproducing information, the angle between the optical axis of the optical pickup and the optical disk surface becomes an important factor. If an angle error occurs between the optical axis and the optical disk surface, the optical pickup playback waveform is distorted and jitter is deteriorated. Invite important problems.

  In particular, in recent years, the storage capacity of optical discs has been greatly increased and the density has been increased. At present, the increase in the density of the optical disk reduces the allowable range of the angle error between the optical axis of the optical pickup and the surface of the optical disk, and the jitter problem is likely to occur.

  For this reason, many adjustment means for adjusting the tilt angle for improving the jitter, that is, the inclination of the radial direction (radial direction) and the tangential direction (direction perpendicular to the radial direction) of the optical disk after assembly is proposed. Yes.

The outline of the tilt adjusting means is, for example, first when the optical pickup is adjusted by adjusting means for vertically moving one of a pair of left and right guide rails for guiding the optical pickup in the radial direction of the optical disk, and secondly, a disk motor for mounting and setting the optical disk. May be performed by adjusting means for directly moving
JP 2001-52346 A JP 2004-71111 A

  As described above, there are a radial direction and a tangential direction in tilt adjustment of an optical disc. In particular, when performing tangential tilt adjustment as an important adjustment element, there is a first means for moving one of the guide rails up and down. However, since it is necessary to accurately move the entire guide rail up and down without tilting from one end to the other end of the guide rail that is long in the radial direction of the optical disc, high processing accuracy and assembly accuracy are required.

  On the other hand, the second means for directly moving the disk motor up and down requires a special support structure for moving the disk motor up and down, and in particular, it is necessary to perform tangential tilt adjustment at two locations. It is not desirable in terms of work.

  Accordingly, an object of the present invention is to provide an optical disc drive apparatus having a simple structure and capable of obtaining an accurate tangential tilt and a method for manufacturing the same.

  In order to achieve the above object, according to the first aspect of the present invention, a pair of left and right first and second guide rails and the first and second guide rails can guide and advance and retreat in the disk radial direction. A support frame and an optical pickup provided on the support frame, and the support frame is rotatably supported at one end about the axis of the first guide rail and slidable. The other end of the support frame includes a subframe provided with first and second rotation support portions for tangential tilt adjustment, and the first rotation support portion is orthogonal to the axial direction of the second guide rail. The second guide rail is slidable along the extending direction of the second guide rail and is rotatable about the axis of the second guide rail. The support frame is Jen a fixed support structure for fixing interstitial after completion of positioning, which is positioned in the tilt setting value by the support frame and fixing means.

In the second, one end of a support frame provided with an optical pickup is attached to one of the left and right first and second guide rails so as to be capable of moving forward and backward with respect to the disk. Process,
The other end of the support frame is slid with respect to the tangential tilt adjustment sub-frame which has a play perpendicular to the axial direction of the second guide rail and is slidably supported along the longitudinal direction. A step of linking and supporting freely;
A support step of supporting the support frame from below with an adjustment jig capable of moving up and down;
The support frame is rotated around the first guide rail by the vertical movement of the adjustment jig and positioned at the tangential tilt setting value, and then the support frame and the rotation support portion of the sub-frame are fixed by a fixing means. And a fixing step.

  As a preferred embodiment, the adjustment jig is configured independently of the optical disk drive device, and can be moved and carried.

  According to the first aspect of the present invention, the left and right first and second guide rails that are the basis of the guide are not moved during the tangential tilt adjustment, so that the optical pickup is accurately guided in the radial direction of the optical disc. Can do.

  In addition, the support frame including the optical pickup after the adjustment that has been subjected to the tangential tilt adjustment has a structure in which one end is supported by the first guide rail and the other end is supported by the second guide rail via the subframe. Therefore, a simple support structure in which the adjustment mechanism is omitted can be achieved.

  Further, since the second rotation support portion can be fixedly supported by the fixing means after the tangential tilt adjustment, a reliable and stable fixed support structure can be obtained over a long period of time.

  In addition, according to the second aspect of the present invention, the tangential tilt adjustment work can be performed by moving up and down one point of the support portion of the support frame and the subframe, so that the adjustment work is simpler than the two-point adjustment. Can be done accurately.

  In addition, since the adjustment jig can be moved and carried after the adjustment is completed, an installation space dedicated to the adjustment jig is not required, which is very preferable in terms of design flexibility.

  Hereinafter, a specific description will be given based on the drawings of FIGS.

  FIG. 1 is a schematic plan view of an optical disk drive device. The base portion 3 of the optical disk drive 1 includes a motor 7 for driving the turntable 5, the pair of left and right first and second guide rails 9 a and 9 b, and a driving unit 11 that drives the first and second guide rails 9 a and 9 a. And a support frame 13 supported at both ends slidably along the line 9b.

  The turntable 5 is loaded and set with the optical disk 15 and is given a rotational power of a predetermined rotational speed by the motor 7.

  The first and second guide rails 9a and 9b are supported by bearings 17 at both upper and lower ends in FIG. 1, and have an arrangement structure for guiding the support frame 13 along the radius direction of the optical disk 15 (arrow A in FIG. 1). Yes.

  The support frame 13 is provided with an optical pickup 19 at a central portion, and has a rising wall 21 having a fitting hole 21a at one end thereof as shown in FIG. The fitting hole 21a of the rising wall 21 can be rotated (arrow B) about the direction axis X in the disk radial direction (arrow A in FIG. 1) with respect to the first guide rail 9a, and in the longitudinal direction. Is slidably fitted along. At the other end of the support frame 13, a sub-frame 27 provided with first and second rotation support portions 23 and 25 for adjusting tangential tilt is provided.

  One first rotation support portion 23 of the subframe 27 is formed in a U-shaped cross section outward. The left-right direction (arrow C in FIG. 2) formed in a U-shape is a play β orthogonal to the direction axis direction X of the second guide rail 9b, and slides in the longitudinal direction (vertical direction in FIG. 1). Possible support structure. The other second rotation support portion 25 of the sub-frame 27 is a convex portion 25a having a downward arcuate cross section, and is engaged with a V-shaped concave portion 29 provided at the other end of the support frame 13. Yes. As shown in FIG. 1, the relationship between the convex portion 25a and the concave portion 29 is relatively rotatable (arrow E) about the same Y axis as the arrow a in the disk radial direction. Further, as shown in FIG. 2, after the positioning is completed (FIG. 5) in which the support frame 13 is positioned at the tangential tilt setting value by the adjusting jig 31, a fixing means 33 such as an adhesive using a photo-curing adhesive or the like. It becomes the fixed support structure fixed integrally by.

  The adjustment jig 31 has a fixed base 37 that can be installed on a predetermined installation surface 35 and a rod-like movable part 39 as shown in FIG. 2, and can be moved and carried.

  Although the fixed pedestal portion 37 is provided with a manual operation portion 41 and is not shown by rotating the operation portion 41 to the right or left, for example, the movable portion 39 is moved up and down depending on the relationship between the rack and the pinion (see FIG. 2 arrow d) is possible.

  On the other hand, the driving means 11 for moving the support frame 13 forward and backward in the radial direction of the optical disk 15 is supported by the lead screw 45 supported at both ends by a support bracket 43 provided on the base portion 3 as shown in FIG. A lead nut portion 49 of the arm portion 47 extended from the frame 13 is screwed. The lead screw 45 is supplied with rotational power of normal rotation or reverse rotation by a drive motor 51 supported by the support bracket 43.

  Therefore, for example, when the lead screw 45 rotates in the forward direction, the support frame 13 can move forward (upward in FIG. 1 arrow i), and by reverse rotation, the support frame 13 can move backward (downward in FIG. 1 arrow i).

  Next, the manufacturing method of the optical disk drive will be described. Of the pair of left and right first and second guide rails 9a and 9b, the support frame 3 provided with the optical pickup 19 for one of the first guide rails 9a. The fitting hole 21a of the rising wall 21 which is one end is inserted and supported so as to be able to advance and retreat in the disk radial direction which is the direction of arrow A in FIG. Next, after temporarily supporting the other end of the support frame 13, which is a free end, from below the movable portion 39 by the adjustment jig 31, one first rotation of the sub-frame 27 with respect to the second guide rail 9 b The support portion 23 is supported so as to be slidable along the longitudinal direction with a play β perpendicular to the axial direction X of the second guide rail 9b. Next, the convex part 25 a of the second rotation support part 25 which is the other side of the subframe 27 is engaged with the V-shaped concave part 29 of the support frame 13 temporarily supported by the movable part 39. Next, the tangential tilt adjustment of the support frame 13 is performed by moving the movable portion 39 of the adjustment jig 31 up and down (FIGS. 3 and 4). At this time, the adjustment work for the tangential tilt is only one adjustment work, so that the adjustment work is easier than the two adjustment work, and the accurate coupling accuracy is obtained by the relationship between the V-shaped concave portion 29 and the convex portion 25a. Get it quickly.

  When the set value of the tangential tilt is accurately positioned by a detector (not shown), the concave portion 29 of the support frame 13 and the convex portion 25a of the sub frame 27 are bonded with a photo-curing adhesive or the like. It is fixedly supported by the fixing means 33. As a result, a fixed support structure that is stable over a long period of time can be obtained and high assembly accuracy can be ensured.

1 is a schematic plan view of an optical disk drive device according to the present invention. The outline cutting explanatory view in the state where the adjustment jig was set under the rotation support part of a support frame and a subframe. The operation explanatory view in the state where tangential tilt adjustment rose too much. Operation | movement explanatory drawing in the state where tangential tilt adjustment fell too much. The operation explanatory view in the state where the tangential tilt adjustment was positioned at the set value.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Base part 5 Turntable 7 Motor 9a 1st guide rail 9b 2nd guide rail 11 Drive means 13 Support frame 15 Optical disk 19 Optical pick-up 23 1st rotation support part 25 2nd rotation support part 31 Adjustment jig 33 Fixing means β Play X axis center line

Claims (3)

  A pair of left and right first and second guide rails, a support frame guided by the first and second guide rails and capable of moving forward and backward in the radial direction of the disk, and an optical pickup provided on the support frame The support frame has one end pivotable about the axis of the first guide rail and is slidably supported, and the other end of the support frame has first and second tangential tilt adjustments. A sub-frame provided with a moving support portion is provided, and the first rotation support portion can be slid along the extending direction of the second guide rail with play perpendicular to the axial direction of the second guide rail. In addition, while being rotatable about the axis of the second guide rail, the second rotation support portion is positioned with the support frame positioned at the tangential tilt setting value. Optical disc driving apparatus characterized by a fixed support structure for fixing by the support frame and fixing means After the completion. Attaching one end of a support frame provided with an optical pickup to one of the left and right first and second guide rails so as to be capable of moving forward and backward with respect to the disk;
The other end of the support frame is slid with respect to the tangential tilt adjustment sub-frame which has a play perpendicular to the axial direction of the second guide rail and is slidably supported along the longitudinal direction. A step of linking and supporting freely;
A support step of supporting the support frame from below with an adjustment jig capable of moving up and down;
The support frame is rotated around the first guide rail by the vertical movement of the adjustment jig and positioned at the tangential tilt setting value, and then the support frame and the rotation support portion of the sub-frame are fixed by a fixing means. And a fixing step. An optical disk drive manufacturing method comprising:   3. The method of manufacturing an optical disk drive device according to claim 2, wherein the adjustment jig is configured independently of the optical disk drive device and is movable and portable.

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