JP2002042432A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the productivity by the curtailment of components of a skew regulating mechanism of a DVD-ROM drive and the simplification of the structure. SOLUTION: The skew regulating mechanism 18 of the DVD-ROM drive 1 comprises a leaf spring 19 which has a restraining part 19a for restraining the axial movement of a sub-guide shaft 17 consisting of a small-diameter part 17a and a large-diameter part 17b and energizes the small-diameter part 17a toward the optical axis direction of the laser beam emitted by an optical pickup 10, a long hole part 20 which is formed at the mechanical chassis 12 for supporting the shaft 17 across the leaf spring 19 and restrains the tangential movement of the shaft 17, a skew regulating screw 21 for regulating the position and inclination of the shaft 17 in the optical axis direction of the optical pickup 10 while overcoming the energizing force of the leaf spring 19 and an internal thread part 22 which is screwed to the skew regulating screw 21 and is formed at the mechanical chassis 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for reproducing an optical disk or writing information to the optical disk.

[0002]

2. Description of the Related Art CD-ROM drives, MO drives,
Among disk devices typified by DVD-ROM drives and the like, there is a type of device that requires so-called skew adjustment, such as a DVD-ROM drive that reproduces a DVD-ROM that achieves higher-density recording among optical disks. This skew adjustment is performed so that the optical axis of the laser beam emitted from the optical pickup is orthogonal to the information recording surface of the optical disk mounted on the turntable in the manufacturing process of the disk device equipped with the adjustment mechanism. Is performed.

The following skew adjustment mechanism is known as a mechanism for realizing such skew adjustment.

That is, the skew adjustment mechanism comprises four coil springs for urging the ends of the main and sub guide shafts for guiding the movement of the optical pickup substantially in the optical axis direction of the optical pickup, and the respective guide shafts. It is incorporated into a mechanical chassis supported via a coil spring, and restrains the movement of the guide shaft in the axial direction and the movement of the guide shaft in the radial direction and the direction orthogonal to the optical axis of the optical pickup. A restraining member for restraining the movement in the radial direction, and a tip and a tip on the peripheral surface of each end of the main and sub guide shafts while preventing the position and inclination of the guide shaft in the optical axis direction of the optical pickup against the urging force of the coil spring. Four adjustment screws for contact and adjustment, and built into the mechanical chassis, the position and inclination of the guide shaft There is composed of a plate that female screw is formed to be screwed with the adjusting screw to be retained.

Therefore, in this skew adjustment mechanism,
Each of the individual adjustment screws is tightened by a predetermined amount while resisting the urging force of each coil spring, and the positions and inclinations of the main and sub guide shafts in the optical axis direction of the optical pickup are adjusted. Skew adjustment can be performed so that the optical axis of the laser beam emitted from the optical pickup is orthogonal to the information recording surface of the optical disk.

[0006]

However, such a conventional skew adjusting mechanism includes a predetermined direction of the guide shaft and the coil spring in addition to the adjusting screw for adjusting the position and inclination of the guide shaft as described above. Since a large number of parts such as a restraining member that restrains the movement of the coil, a coil spring that biases each end of the guide shaft, and a plate that is screwed with the adjusting screw are required,
The apparatus itself becomes expensive and the structure becomes complicated, and there is a problem in productivity.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a disk drive capable of improving productivity by reducing the number of components and simplifying the structure.

[0008]

In order to achieve the above object, a disk drive according to the present invention comprises: an optical pickup;
A guide shaft for guiding the movement of the optical pickup, and a biasing member having a restraining portion for restraining the guide shaft from moving in the axial direction, and biasing the guide shaft substantially in the optical axis direction of the optical pickup; Means for positioning the guide shaft substantially in the optical axis direction of the optical pickup while resisting the urging force of the urging member.

According to the disk device of the present invention, in the structure of the mechanism for performing the so-called skew adjustment, the function of urging the guide shaft substantially in the optical axis direction of the optical pickup and the axial direction of the guide shaft (thrust Direction) is realized by one biasing member, so that the number of components of the skew adjustment mechanism is reduced and the structure is simplified, thereby improving the productivity of the apparatus. Can be done.

The disk device according to the present invention has an optical pickup, a guide shaft for guiding the movement of the optical pickup, and a restraining portion for restraining the guide shaft from moving in the axial direction. A biasing member for biasing the optical pickup substantially in the optical axis direction, a mechanical chassis supporting the guide shaft via the biasing member, and a position and a position of the guide shaft substantially in the optical axis direction of the optical pickup. An adjusting member for adjusting the inclination while opposing the urging force of the urging member; and the adjusting member formed on the mechanical chassis and adjusting the position and the inclination of the guide shaft adjusted by the adjusting member. It is characterized by comprising an engaging portion that engages with the member.

The disk device according to the present invention has a function of biasing the guide shaft substantially in the optical axis direction of the optical pickup and restricting the movement of the guide shaft in the axial direction in the structure of the mechanism for adjusting the skew. And a function of supporting the guide shaft via the biasing member, and holding the position and inclination of the guide shaft adjusted by the adjusting member. The mechanical chassis has the function of performing Therefore, according to the disk device of the present invention, since the urging member and the mechanical chassis each have a plurality of functions, it is possible to reduce the number of components constituting the skew adjustment mechanism and the like and to simplify the structure. Thus, the productivity of the device can be improved.

Further, in the disk device according to the present invention, the mechanical chassis according to the present invention restrains the movement of the guide shaft in a radial direction of the guide shaft and in a direction substantially perpendicular to the optical axis of the optical pickup. It is characterized in that a radial restraining portion is formed.

According to the disk device of the present invention, in addition to the configuration of the disk device of the present invention, a portion for restricting the movement of the optical pickup in the radial direction except for the optical axis direction of the optical pickup is provided in the mechanical chassis. Since it is constituted by the parts, it is possible to further reduce the number of components and simplify the structure.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a notebook type P to which the present invention is applied.
FIG. 2 is a perspective view showing a DVD-ROM drive corresponding to C (personal computer), FIG. 2 is a perspective view of the drive of FIG. 1 from which an upper cabinet is removed, and FIG. 3 is a DVD of FIG.
FIG. 4 is a perspective view showing the disk reproducing unit supported in a floating structure in the ROM drive, and FIG. 4 is a perspective view showing the back surface of the disk reproducing unit in FIG.

As shown in FIG. 1 and FIG.
The ROM drive 1 includes a drawer 3 on which the disk reproducing unit 2 for driving and reproducing a disk is mounted.
And a cabinet 4 as a housing capable of housing the drawer 3. The cabinet 4 has an upper cabinet 5 as an upper lid and a drawer 2 with arrows X1-X2.
And a lower cabinet 6 provided with guide rails and the like which can be freely inserted and removed in the directions.

As shown in FIGS. 3 and 4, a disk reproducing unit 2 mounted on the drawer 3 has a disk motor 8 for driving a turntable 7 on which an optical disk is mounted, and a disk drive 8 on the information recording surface of the optical disk. An optical pickup 10 for reading data from a disk by irradiating a laser beam from the objective lens 9 and taking in reflected light thereof, and a pickup feed mechanism 11 for transporting the optical pickup 10 in the radial direction R1-R2 are provided. The spindle motor 9, the optical pickup 10, and the pickup feed mechanism 11 are mounted on a single mechanical chassis 12, and the mechanical chassis 12 has a floating structure on the drawer 3 via a vibration-proof member such as a damper rubber. Supported.

The pickup feed mechanism 11 includes a feed motor 13 for generating a driving force for transporting the optical pickup 10, a pinion gear and a plurality of reduction gears mounted on a rotation shaft of the feed motor 13, and a reduction gear. A screw having a screw shaft gear attached to one end thereof and having a spiral groove 14 meshed with a PU rack gear attached to the optical pickup 10 together with a leaf spring or the like by the urging force of the leaf spring. The optical pickup 10 includes a main guide shaft 16 and a sub-guide shaft 17 for guiding the optical pickup 10 to move in the radial direction R1-R2 when the optical pickup 10 is transported by rotation of the screw shaft 15. I have.

Further, the disc reproducing unit 2 of the present embodiment has an objective lens 9 of an optical pickup 10 with respect to an information recording surface of an optical disc mounted on a turntable 7.
A skew adjustment mechanism is provided for performing adjustment so that the optical axes of the more radiated laser beams are orthogonal. In this embodiment, the skew adjustment mechanism 18 provided on the support portion of the sub guide shaft 17 will be described in detail with reference to FIGS.

That is, the skew adjustment mechanism 18
As shown in FIGS. 5 and 6, the sub-guide shaft 17 is supported on the mechanical chassis 12 via a leaf spring 19, and further, is a front view of FIG. 8) and the perspective view of FIG. 8, the sub-guide shaft 1 includes a small-diameter portion 17a and a large-diameter portion 17b whose both ends are formed to have a smaller diameter than the center.
7 has a restraining portion 19a for restraining movement in the axial direction (thrust direction), that is, in the directions of arrows R1-R2.
The optical axis direction Z1-Z of the laser beam emitted from the optical pickup 10 to the small diameter portion 17a of the sub guide shaft 17
2 (in this embodiment, direction Z1)
9 and a direction perpendicular to the optical axis of the optical pickup 17 in the radial direction of the sub-guide shaft 17 and the arrow T1-T2. The position and inclination of the elongated hole 20 for restricting the movement of the sub-guide shaft 17 in the direction and the sub-guide shaft 17 in the optical axis direction Z1-Z2 of the optical pickup 10 are adjusted while resisting the urging force of the leaf spring 19. Adjusting screw 21 formed on the mechanical chassis 12 for maintaining the position and inclination of the sub-guide shaft 17.
And a female screw portion 22 to be screwed.

The leaf spring 19 is provided with a flat mounting portion 19b which is fixed to the mechanical chassis 12 by a screw or the like at the center thereof. A shaft supporting portion 19c that supports the small diameter portions 17a at both ends of the sub guide shaft 17 while generating an urging force in the direction is provided. Further, an end face of the shaft support portion 19c is the above-described constraint portion 19a,
It contacts the end face of the large diameter portion 17b of the sub-guide shaft 17, and restricts the movement of the sub-guide shaft 17 in the axial direction.

The elongated hole 20 is formed in an upright surface 24 orthogonal to the main surface of the mechanical chassis 12 in a bent portion 23 formed by bending the mechanical chassis 12 into a crank shape.
The width t of the long hole portion 20 is formed so as to fit with the diameter of the small diameter portion 17a of the sub guide shaft 17, and the sub guide shaft 17 can be positioned in the direction of the arrow T1-T2.

The female screw portion 22 is formed on a parallel surface 25 of the bending portion 23 of the mechanical chassis 12 which is parallel to the main surface of the mechanical chassis 12. Small diameter part 17a of
The tip of the skew adjustment screw 21 can be arranged at a position facing the other end of the skew adjustment screw 21.

The skew adjustment mechanism 1 configured as described above
8, the individual skew adjusting screws 21 are each tightened or loosened by a predetermined amount while resisting the urging force of the shaft supporting portions 19 c at both ends of the leaf spring 19, so that the laser beam emitted from the optical pickup 10 is irradiated. Axial direction Z1-Z2
Can adjust the inclination of the sub-guide shaft 17 in the radial direction R1 of the laser beam emitted from the optical pickup 10 to the information recording surface of the optical disc.
The radial skew, which is the slope of -R2, can be adjusted.

In the skew adjusting mechanism 18, the skew adjusting screws 21 are similarly tightened by a predetermined amount, for example, so that the laser beam emitted from the optical pickup 10 in the optical axis direction Z1-Z2, that is, in the height direction. The relative positional relationship between the main guide shaft 16 and the sub guide shaft 17 can be adjusted, and the inclination of the laser beam emitted from the optical pickup 10 in the tangential direction T1-T2 with respect to the information recording surface of the optical disk. Tangential skew can be adjusted. In the present embodiment, the skew adjustment mechanism 18 on the sub guide shaft 17 side has been described. However, a skew adjustment mechanism similar to this mechanism 18 may be provided on the main guide shaft 16 side.

As described above, the DVD-ROM of this embodiment
According to the drive 1, in the structure of the mechanism for performing the skew adjustment, the function of urging the sub guide shaft 17 and the like in the optical axis direction Z1 of the optical pickup 10 and the axial direction R1-R2 of the sub guide shaft 17 are provided. Of the mechanical chassis 12 is supported by the leaf spring 19, the function of supporting the sub-guide shaft 17 and the like via the leaf spring 19, and the function of the sub chassis adjusted by the skew adjusting screw 21. A function of maintaining the position and inclination of the guide shaft 17 in the height direction, and a tangential direction T1-T of the sub-guide shaft 17;
It also has the function of restricting the movement to 2. Therefore, according to the DVD-ROM drive 1 of the present embodiment, since the leaf spring 19 and the mechanical chassis 12 each have a plurality of functions, the number of components constituting the skew adjustment mechanism and the like are reduced and the structure is simplified. And the productivity of the drive device can be improved.

As described above, the present invention has been specifically described with reference to the embodiments. However, the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist thereof. For example, in the present embodiment, the present invention is applied to a DVD-R
The case where the invention is applied to the OM drive has been described.
The present invention can be applied to various optical disk drives for reproducing (or writing) D, DVD, MO, CD-ROM, CD-R, and the like.

[0028]

As described above, the disk device according to the present invention has a function of biasing the guide shaft substantially in the optical axis direction of the optical pickup in the structure of the mechanism for adjusting the skew. The function of restraining the movement in the axial direction is realized by an urging member formed by, for example, a leaf spring, and the function of supporting the guide shaft via the urging member and the function of being adjusted by the adjusting member are adjusted. For example, the mechanical chassis has a function of holding the position and inclination of the guide shaft and a function of restricting the movement of the guide shaft in the radial direction excluding the optical axis direction of the optical pickup. Therefore, according to the disk device of the present invention, since the urging member and, for example, the mechanical chassis each have a plurality of functions, it is possible to reduce the number of components such as the skew adjustment mechanism and to simplify the structure. Thus, the productivity of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a DVD-ROM drive according to an embodiment of the present invention.

FIG. 2 is a perspective view of the DVD-ROM drive of FIG. 1 from which an upper cabinet is removed.

FIG. 3 is a perspective view showing a disk reproducing unit supported in a floating structure in the DVD-ROM drive of FIG. 1;

FIG. 4 is a perspective view showing a back surface of the disk reproducing unit of FIG. 3;

FIG. 5 is a perspective view showing a mounted state of a leaf spring constituting a skew adjustment mechanism provided in the disk reproducing unit of FIG. 3;

FIG. 6 is a perspective view showing an attached state of a sub guide shaft supported via a leaf spring of FIG. 5;

FIG. 7 is a front view and a side view showing a skew adjustment mechanism provided in the disk reproducing unit of FIG. 3;

FIG. 8 is a perspective view for explaining an effect of the leaf spring of FIG. 5 on a sub guide shaft.

[Explanation of symbols]

 Reference Signs List 1 DVD-ROM drive 2 Disc reproducing unit 10 Optical pickup 12 Mechanical chassis 16 Main guide shaft 17 Sub guide shaft 17a Small diameter portion of sub guide shaft 17b Large diameter portion of sub guide shaft 18 Skew adjustment Mechanism 19: Leaf spring 19a: Restricted portion of leaf spring 19c: Shaft support of leaf spring 20: Slot 21: Skew adjusting screw 22: Female screw portion 23: Bending portion of mechanical chassis 24: Standing surface of bending portion 25 ... parallel surface of the bent part

Claims (3)

[Claims] An optical pickup; a guide shaft for guiding the movement of the optical pickup; and a restraining portion for restraining the guide shaft from moving in an axial direction. A disc device comprising: a biasing member for biasing in a direction; and means for positioning the guide shaft substantially in the optical axis direction of the optical pickup while resisting the biasing force of the biasing member. 2. An optical pickup, comprising: a guide shaft that guides movement of the optical pickup; and a restraining portion that restrains movement of the guide shaft in an axial direction. A biasing member for biasing the guide shaft via the biasing member; and a position and inclination of the guide shaft substantially in the optical axis direction of the optical pickup. An adjusting member for adjusting while resisting the force; an engaging portion formed on the mechanical chassis and engaging with the adjusting member so as to maintain the position and inclination of the guide shaft adjusted by the adjusting member. A disk device comprising: 3. The disk device according to claim 2, wherein the guide shaft is formed on the mechanical chassis and restrains movement of the guide shaft in a radial direction of the guide shaft and in a direction substantially orthogonal to an optical axis of the optical pickup. A disk device further comprising a radial restraint.