JPH1166568A - Disk drive device - Google Patents

Abstract

(57) Abstract: A deviation of a skew angle between a signal surface of an optical disc and an optical axis of a laser beam with respect to a right angle, in particular, a skew angle in a radial direction is determined by increasing the density of a recording medium and increasing the rotation speed. It is performed with high accuracy even in disk drive devices that have become more advanced. SOLUTION: A slide guide part 33 slidably supports a carriage 35 on which an optical pickup mechanism 21 is mounted.
And a skew base 17 on which the guide shaft 34 is disposed, which is rotatably supported on the chassis 8 using a shaft perpendicular to the guide shaft 34 and parallel to the surface of the optical disk 18 as a rotation shaft, and the carriage is supported by the guide shaft. The sled motor 49 and the speed reduction mechanism 50 of the sled mechanism 23 for moving in the direction are disposed on the chassis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical pickup in which the laser beam is not perpendicular to the signal surface of the optical disk (the deviation from the right angle is hereinafter referred to as "skew", and the deviation angle is referred to as "skew angle"). The present invention relates to a technique for adjusting the skew angle, in particular, a disk drive device provided with a skew adjustment mechanism in the radial direction, and for reducing the weight of a member moved by the skew adjustment mechanism.

[0002]

2. Description of the Related Art In a disk drive device, an optical pickup is mounted on a carriage, the carriage is movably supported on a chassis, and an objective lens of the optical pickup moves in a radial direction of the optical disk. .

In a disk drive device,
When the optical disk is chucked by the disk rotation mechanism, the angle between the signal surface of the optical disk and the optical axis of the laser light emitted from the optical pickup mechanism needs to be a right angle. The skew angle includes a skew angle in a radial direction deviating from a right angle in a radial direction of the optical disc and a skew angle in a tangential direction deviating from a right angle in a tangential direction of a track.

In particular, in recent years, DVDs (digital video dis
In a disk drive device for a recording medium having a high recording density as in k), the right angle of the optical axis of the laser beam with respect to the signal recording surface of the optical disk must be defined extremely accurately.

[0005] Therefore, a guide shaft that slidably supports a carriage on which an optical pickup mechanism is mounted is fixed to a skew base, and the skew base is mounted on a chassis to which a disk rotation mechanism (including a disk chucking mechanism) is fixed. In some cases, the skew base is rotatably supported, and the skew base is rotated in a direction perpendicular to the guide shaft and the signal surface of the optical disk to adjust the skew angle in the radial direction.

[0006]

However, in a disk drive device in which a skew base is supported rotatably with respect to a chassis, the carriage moves on a guide shaft supported by the skew base. The sled mechanism and the sled motor for moving the skew mechanism are provided on the skew base. There was a problem that adjustment could not be performed.

[0007] In particular, as the rotational speed of the disk drive device increases, the ability to follow the skew adjustment has become a problem.

Accordingly, the present invention provides a method for increasing the recording density and increasing the rotational speed of the recording medium by adjusting the deviation angle of the angle between the signal surface of the optical disk and the optical axis of the laser beam with respect to the right angle, in particular, the skew angle in the radial direction. It is an object of the present invention to perform the processing with high accuracy even in a disk drive device in which the speeding up has been advanced.

[0009]

In order to solve the above-mentioned problems, a disk drive apparatus according to the present invention has a skew provided with a guide shaft slidably supporting a carriage on which an optical pickup mechanism is mounted. A sled motor of a sled mechanism for moving the carriage in the guide axis direction is provided on the chassis, with the base rotatably supported on the chassis with the axis perpendicular to the guide shaft and parallel to the surface of the optical disc as the rotation axis. It was done.

Therefore, according to the disk drive of the present invention, only the carriage on which the optical pickup mechanism is mounted and the guide shaft for slidably supporting the carriage are provided on the skew base moved by the skew mechanism. The weight of the skew base can be reduced, so that the skew adjustment can be performed promptly, and the skew can be adjusted in a disk drive device in which the density of the recording medium and the rotation speed have been increased.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the disk drive of the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

In the embodiment shown in the drawings, the operation of taking in and out the disk tray for mounting and holding the optical disk, that is, loading and unloading of the optical disk, and moving the disk rotation drive mechanism up and down with respect to the disk tray. The present invention is applied to such a disk drive device, and both optical disks such as a standard density disk such as a CD and a CD-ROM and a high density disk such as a DVD and an HD-CD can be used as an information recording medium.

As shown in FIGS. 1 and 2, the disk drive device 1 comprises a frame 3 having an outer casing 2 opened upward and forward, and an outer casing cover 4 for covering the upper and left and right sides of the frame 3. And a front panel 5 that covers the front opening of the frame 3. The front panel 5 is formed with a tray entrance 5a into which the disk tray 6 is inserted so as to be able to be taken in and out. The tray entrance 5a is closed by the front plate 6a when the disk tray 6 is inserted into the outer casing 2. Further, the front panel 5 is provided with an eject button 5b for ejecting the disc tray 6 and the like.

In this specification, when indicating a direction,
In FIG. 1, the direction toward the diagonally lower left is the front side, and the direction toward the diagonally upper right is the rear side. Also, a direction heading obliquely downward right is defined as right side, and a direction heading obliquely upward left is defined as left side. Further, an upward direction is defined as an upper side, and a downward direction is defined as a lower side.

The material of the outer casing cover 4 is preferably a steel plate, the frame 3, the front panel 5, and the disc tray 6 are preferably made of a synthetic resin material such as ABS resin.
The outer casing cover 4 may be formed of a synthetic resin material, and the disk tray 6 may be formed of a metal, for example, an aluminum alloy.

The bottom plate 7 of the frame 3 is formed in the shape of an upper bottom.
The opening 8a is provided with a chassis 8 having a slightly longer length in the front-rear direction and a slightly shorter left-right width than the opening 7a.

On the left and right bottom plates 7c and 7d of the frame 3,
The tray guides 10, 1 for supporting guide rails 9, 9,... Formed on both right and left edges of the disc tray 6 from below.
Are provided at predetermined intervals in the front-rear direction.

On the inner surfaces of the left and right side walls 11, 11 of the frame 3, there are provided tray holding guides 11a, 11a,..., And the tray holding guides 11a, 11a,.
, And the above-mentioned tray guides 10, 10,..., The disc tray 6 is supported slidably in the front-rear direction with its guide rails 9, 9,. Can be inserted.

The rear end of the chassis 8 is attached to the rear bottom plate 7b of the bottom plate 7 of the frame 3 via cushioning members 12, 12 made of an elastic member such as rubber so as to be tiltable by set screws 13, 13. Thereby, the chassis 8
Is rotatably arranged with its rear end as a fulcrum so as to fit into the opening 7a of the frame 3.

At the front end of the chassis 8, a sub-chassis 14 is provided with a cushioning member 1 similar to the cushioning members 12, 12.
The sub-chassis 14 is tiltably supported by set screws 16, 16 via 5, 15, and the front end of the sub-chassis 14 is connected to a lifting mechanism described later.

A large opening 8a is formed in the center of the chassis 8, and a skew base 17 on which a carriage provided with an optical pickup mechanism to be described later is slidably supported is provided on the lower surface of the chassis 8. , And is rotatably supported on an axis parallel to a rotation axis of the chassis 8 with respect to the frame 3 as a rotation axis.

Next, the structure of each mechanism of the disk drive 1 will be described.

In the outer casing 2, a loading mechanism 19 for moving the disc tray 6 on which the optical disc 18 is loaded into and out of the outer casing 2, a disc rotating mechanism 20 for driving the optical disc 18 to rotate, and a signal An optical pickup mechanism 21 for reading and / or writing, and a skew for adjusting a deviation angle with respect to a right angle of an angle between a signal surface of the optical disk 18 and an optical axis of a laser beam of the optical pickup mechanism 21, particularly, a skew angle in a radial direction. Adjusting mechanism 22 and optical pickup mechanism 21
A sled mechanism 23 for moving the disk in the radial direction of the optical disk 18 and an elevating mechanism 24 for raising the disk rotating mechanism 20 and the optical pickup mechanism 21 during loading are housed.

The loading mechanism 19 is formed integrally with the drive section 25 provided on the front bottom plate 7e of the frame 3 and the disk tray 6, and is provided with the final gear 2 of the drive section 25.
5a.

The drive section 25 includes a drive motor (not shown) and a plurality of gears.
Is rotatably supported by a swing plate that is rotatably supported with respect to the front bottom plate 7e, and the final stage gear 25a
Make a swing motion with respect to the frame 3.

The rack 26 is oriented such that the teeth are directed rightward.
The back surface (lower surface) of the left side portion of the disk tray 6 with an inverted J-shape as viewed from above, with its arc portion located on the front side.
Are formed integrally.

Inside the rack 26, J
A guide groove 27 having a U-shape is formed.
The rotation shaft 25b of the last-stage gear 25a is engaged with the gear.

The disk tray 6 has a substantially flat plate-like shape, and has a concave disk mounting portion 28 on which the optical disk 18 such as a CD or DVD can be horizontally mounted and accommodated.
Are formed. A long opening 28a is formed rearward from the center of the disk mounting portion 28 to the rear.

At the peripheral portion of the disk mounting portion 28, disk holding pieces 29, 29,... Are eccentrically mounted so as to be eccentrically rotatable. The optical disk 18 protrudes inside the disk mounting portion 28 and is positioned above the peripheral edge of the optical disk 18 on which the optical disk 18 is mounted. Thus, even when the disk drive device 1 is used vertically, it is possible to prevent the optical disk 18 from dropping from the disk mounting portion 28.

The driving unit 2 of the loading mechanism 19
5, the disk tray 6 is moved to its rack 26.
Is moved in the front-rear direction by meshing with the final stage gear 25a of the drive unit 25. Also, the rotation shaft 25 of the final stage gear 25a
b moves relatively along the J-shaped guide groove 27, and when the rotation shaft 25b is positioned within the circular arc portion of the guide groove 27,
The drive unit 25 is rotated. Such rotation serves as a driving source of the elevating mechanism 24 as described later.

The disk rotating mechanism 20 is mounted on the chassis 8
And a turntable 31 fixed to a spindle shaft 30a of the spindle motor 30. The chassis 8 is rotated to rotate the spindle motor 30. When the turntable 31 is lifted, the turntable 31 is moved upward by the chucking pulley 3
The optical disk 18 is pinched in cooperation with the optical disk 18.

The optical pickup mechanism 21 includes a chassis 8
Guide portion 3 of the skew base 17 supported by the skew base 17
3 is provided on a carriage 35 slidably supported by the guide shaft 34 and the guide shaft 34. The carriage 35 is moved in the radial direction of the optical disk 18 by the sled mechanism 23.

The optical pickup mechanism 21 includes an optical pickup 36 for a standard density disk such as a CD or a CD-ROM and an optical pickup 37 for a high density disk such as a DVD or an HD-CD as described above. Being
The two optical pickups 36 and 37 are mounted on a carriage 35 with the objective lenses 36a and 37a close to each other, and a skew sensor 38 is attached to the carriage 35.

The skew adjustment mechanism 22 includes a skew drive unit 39 fixed to the rear end of the chassis 8 and a cam gear 4 that is driven to rotate in the forward and reverse directions by the skew drive unit 39.
0, an eccentric cam groove 41 formed in the cam gear 40, and the cam groove 4 provided in the skew base 17.
1 to be operated.

The skew base 17 has an opening 17a slightly smaller than the opening 8a of the chassis 8, and the left side edge of the opening 17a is engaged with the engagement sliding portion 35b of the carriage 35. The guide shaft 34 is attached to the sliding guide 33 on the opening edge side opposite to the sliding guide 33 so as to bridge the front and rear edges of the opening 17a.

The carriage 35 has a bearing 35 on its right side.
a, an engagement sliding portion 35b is provided on the left side, the guide shaft 34 is slidably inserted into the bearing portion 35a, and the engagement sliding portion 35b is The carriage 35 is slidably engaged with the moving guide portion 33, whereby the carriage 35 is slidably supported in the front-rear direction within the opening 17 a of the skew base 17. Further, a rack 43 is attached to the carriage 35 at a position on the right side of the bearing portion 35 a in parallel with the guide shaft 34.

Side walls 17b, 17b bent downward are formed on the left and right side edges of the skew base 17, and the shaft pins 44, 44 are located at positions closer to the front side than the center of the side walls 17b, 17b in the front-rear direction. Is protruding.

Side walls 8b, 8b which are bent downward are formed on the left and right side edges of the chassis 8, and are located closer to the front than the center in the front-rear direction of the side walls 8b, 8b, Shaft holes 45, 45 are formed at positions corresponding to the pins 44, 44, and the shaft pins 44, 44 of the skew base 17 are supported by the shaft holes 45, 45, whereby the skew base 17 is A line connecting the left and right shaft pins 44 to the chassis 8, that is, a shaft extending in the left-right direction, is supported so as to be tiltable as a tilt axis.

A coil spring 46 is stretched between the right end of the front edge of the chassis 8 and a substantially central portion of the front edge of the skew base 17. The shaft pins 44, 44 and the shaft holes 45, 45 are prevented from rattling in the axial direction. In addition, chassis 8
A set screw (not shown) is screwed into the right side wall 8b of the skew base 17 so that the skew base 17 does not unnecessarily shift with respect to the chassis 8.

A bent piece 47 bent upward is formed at the rear edge of the skew base 17, and engages with the cam groove 41 of the cam gear 40 of the skew adjustment mechanism 22 on the rear surface of the bent piece 47. The operated pin 42, which functions as a cam follower, protrudes.

The skew base 17 is mounted on the chassis 8
The operated pin 42 is supported on the lower surface of the cam gear 40 so that the operated pin 42 can be tilted.
And is slidably engaged with the cam groove 41.

On the upper surface of the rear end of the skew base 17, a coil spring 48 is contracted between the lower surface of the chassis 8 and the rear end of the skew base 17 with respect to the chassis 8. The moving force is urged to move downward.

When the cam gear 40 is rotated by the skew driver 39 of the skew adjusting mechanism 22, the operated pin 42 engaged with the cam groove 41 slides relatively in the cam groove 41. As a result, the skew base 17 tilts with respect to the chassis 8.

As a result, the carriage 35 slidably supported by the slide guide 33 and the guide shaft 34 attached to the skew base 17 is tilted up and down with respect to the chassis 8.

Then, the optical axis of the laser light emitted from the objective lenses 36a, 37a of the optical pickups 36, 37 mounted on the carriage 35 and the optical axis of the optical disk 18 chucked by the disk rotating mechanism 18 provided on the chassis 8. The angle formed by the signal surface is displaced in the radial direction of the optical disk 18, and accordingly, the skew angle in the radial direction is adjusted.

The skew angle is adjusted by the skew sensor 38 at all times or when the angular relationship between the signal surface of the optical disk 18 and the skew sensor 38 is detected, and the skew angle deviates from an allowable range. It has become.

The sled mechanism 23 includes a sled motor 49 provided on the right side of the rear end of the chassis 8, a speed reduction mechanism 50 for reducing the rotation of the sled motor 49 and transmitting the rotation to the final gear 50 a, and a speed reduction mechanism 50. Last stage gear 50a
And the rack 43 provided on the carriage 35. When the rack 43 is fed in the front-rear direction by the rotation of the thread motor 49, the carriage 35 on which the optical pickup mechanism 21 is mounted is moved to the sliding guide portion 33.
The optical disk 18 is moved in the radial direction by being guided by the guide shaft 34.

The lifting mechanism 24 is provided with the loading mechanism 1
9, a cam body 51 rotatably provided on the front bottom plate 7e of the frame 3 adjacent to the final gear 25a of the drive unit 25, and a cam body 51 provided on the front edge of the sub-chassis 14.
And an engaging pin 53 as a cam follower slidably engaged with the cam groove 52 formed in the groove.

The cam groove 52 has a relatively large vertical displacement, and the driving portion 25 of the loading mechanism 19
The rotation of the cam body 51 causes the engagement pin 53 of the sub-chassis 14 engaged with the cam groove 52 to move in the vertical direction.

At the opening edge of the front bottom plate 7e of the bottom plate 7 of the frame 3, there is formed a guide plate 55 having a guide groove 54 formed at a position corresponding to the engaging pin 53 for vertically guiding the engagement pin 53. The engagement pin 53 of the sub-chassis 14 has its base end engaged with the guide groove 54 of the guide plate 55 so as to be slidable in the vertical direction. It is slidably engaged with the groove 52.

The sub-chassis 14 is formed of a steel plate, and has left and right side walls and a front wall which are bent downward at the left and right edges and the center of the front edge.
Is disposed so as to cover the left and right side edges and the front edge of the front end from above.

Projecting members 56 and 57 projecting outward are provided on the left and right side walls of the sub-chassis 14 at predetermined intervals in the longitudinal direction of the chassis 8, and are provided on the front wall of the sub-chassis 14. An engagement pin 53 is protruded.

The front connecting rods 56, 56 are connected by a line connecting them to the spindle shaft 30a of the spindle motor 30.
And intersect at right angles. As a result, the line connecting the front protrusions 56 and 56 coincides with the diameter direction of the chucked optical disk 18 when viewed from above. Generally, the standard of the dimensions of each part and the mounting dimensions of each member in the disk drive device 1 is the center of the chucked optical disk 18, that is, the spindle shaft 30a, and the spindle motor 30 is mounted. The dimensional standard for the chassis 8 and the dimensional standard for the frame 3 can be matched, which contributes to the improvement of the dimensional accuracy of each part.

The protrusions 56 on the left and right side walls of the sub-chassis 14
Reference numerals 56, 57, and 57 denote opening portions 7 of the frame 3, respectively.
a, engaging grooves 58, 58, 59, 59 formed in the peripheral portion
Are engaged separately.

Of the engagement grooves 58, 59 formed in the opening 7a of the frame 3, the front engagement groove 58 is open downward and is formed to extend in the vertical direction. The mating groove 59 extends in the front-rear direction, and its rear end is opened upward.

When the disc tray 6 is pulled into the outer casing 2 by the loading mechanism 19, the cam body 51 rotates with the rotation of the drive unit 25 of the loading mechanism 19, and the cam 51 moves into the cam groove 52. The engaged pin 53 is raised to move the front end of the sub-chassis 14 upward.

When the engagement pin 53 at the front edge of the sub-chassis 14 is moved upward, the sub-chassis 14 is rotated around the rear protrusions 57, 57 as pivot points, and the front protrusions 56, 5
6 moves upward in the engagement grooves 58 on the front side of the frame 3, and accordingly, the sub-chassis 14 raises the front end of the chassis 8 via the buffer members 15, 15, and the chassis 8 To rotate.

When the chassis 8 rotates upward with respect to the frame 3, the disk rotating mechanism 20 and the optical pickup mechanism 21 are raised, and chucking of the optical disk 18 is performed. Will do.

In the disk drive 1, the loading mechanism 20 operates to load the optical disk 18 into the disk mounting portion 28 of the disk tray 6, which is pulled out from the tray entrance 5a of the front panel 5 of the frame 3.
Is loaded and a loading operation is performed, the disk tray 6 is drawn into the outer casing 2 and moved. After the completion of the loading operation, the cam body 51 is rotated as described above, and the engaging pin 53 located at the lower portion of the cam groove 52 is pushed upward along the cam groove 52.

As a result, the sub-chassis 14 is pivoted upward about the engagement portion between the rear protrusions 57, 57 and the rear engagement grooves 59, 59, and the chassis 8 is accordingly moved to the rear. The frame 3 is raised with a fastening portion via the buffer members 12 and 12 as a fulcrum. The disk rotation mechanism 20 and the optical pickup mechanism 21
Is raised, and the optical disk 18 on the disk tray 6 is placed so as to be picked up on the turntable 31 in a state where the retraction operation is completed, separated from the disk tray 6, and chucked by the turntable 31 and the chucking pulley 32. Is done.

In this state, the disk rotating mechanism 20 is driven, the optical disk 18 is rotated by the rotation of the turntable 31, and the optical pickup mechanism 21 is operated to read or write information recorded on the optical disk 18.

If the signal surface of the optical disk 18 and the carriage 35 are not in a predetermined angular relationship, the signal is detected by the skew sensor 38 and the skew driver 39 of the skew adjusting mechanism 22 is driven. By rotating the cam gear 40 by a predetermined angle, the skew base 1
7 is tilted with respect to the chassis 8, so that skew adjustment in the radial direction is performed.

At this time, the member moved by the skew adjustment mechanism 22 is the skew base 17, on which only the carriage 35 provided with the optical pickup mechanism 21 is mounted. Since relatively heavy members such as the portion 39, the sled motor 49 of the sled mechanism 23, and the speed reduction mechanism 50 thereof are not mounted on the skew base 17, the skew base 17 is relatively lightweight, and skew adjustment is performed quickly. be able to.

This means that the skew angle must be controlled with high precision, especially in a high-density disc.
It is necessary to make the skew-based inclination follow the change instantaneously, and the present invention is suitable as a disk drive device for such a high-density disk.

The rack 43 attached to the carriage 35 of the sled mechanism 23 is attached to the skew base 17, and the final gear 50 a of the speed reduction mechanism 50 of the sled mechanism 23 is attached to the chassis 8. Therefore, when the skew base 17 is tilted with respect to the chassis 8 due to the skew adjustment, the positional relationship between the two is relatively shifted, but the shift is slight and the shift direction is determined by the rack 43. And the direction in which the teeth of the final gear 50a extend substantially, so that there is no hindrance to the movement of the carriage 35 by the sled mechanism 23.

In the above embodiment, a CD or CD-
Although an optical disk such as a ROM has been described as an information recording medium, the present invention can also be applied to various magneto-optical disk devices that perform recording and / or reproduction using a magneto-optical disk such as an MO as an information recording medium.

Further, in the above embodiment, the optical disk apparatus of the disk tray system for reproducing (reading) the information recorded on the optical disk has been described. However, the present invention can be applied to a recording-only apparatus which only records information. Of course, the present invention can be applied to an optical disk device capable of performing both recording and reproduction of information.

Further, in the above-described embodiment, the disk drive device having the loading mechanism and the chassis elevating mechanism has been described, but the present invention is not limited to this.
The present invention can also be applied to a disk drive device not provided with these.

Further, in the above embodiment, the optical disk such as a CD is used in a bare state. However, the optical disk is housed in a disk cartridge for loading and unloading. There may be.

[0070]

As is apparent from the above description, according to the first aspect of the present invention, the skew base on which the guide shaft for slidably supporting the carriage on which the optical pickup mechanism is mounted is supported. Is mounted on the chassis so as to be rotatable about an axis perpendicular to the guide shaft and parallel to the surface of the optical disk, and a sled mechanism for moving the carriage in the guide axis direction is provided on the chassis. Therefore, the skew base moved by the skew mechanism is provided only with the carriage on which the optical pickup mechanism is mounted and the guide shaft that slidably supports the carriage, and the skew base can be reduced in weight. Therefore, skew adjustment can be performed promptly, and disk drives with higher recording medium density and higher rotational speed have been developed. It is possible to perform the skew adjustment in blanking apparatus.

According to the second aspect of the present invention, since the speed reduction mechanism of the sled mechanism is provided in the chassis, the skew base can be further reduced in weight, the skew adjustment can be performed promptly, and the recording medium can be adjusted. Skew adjustment in a disk drive device in which the density of the disk drive has been increased and the rotation speed has been increased.

The specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiment of the present invention. The scope should not be construed as limiting.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a disk drive device of the present invention together with FIGS. 2 to 10, and is a perspective view showing an unloaded state of a disk tray.

FIG. 2 is an overall perspective view showing a state where an outer casing cover is removed.

FIG. 3 is an exploded perspective view showing a frame and a chassis.

FIG. 4 is an exploded perspective view showing a chassis and a sub-chassis.

FIG. 5 is an exploded perspective view showing a sub chassis and a skew base.

FIG. 6 is an enlarged front view showing a skew adjustment mechanism.

FIG. 7 is a plan view showing an unloading state of the disk tray with an outer casing cover removed.

FIG. 8 is a plan view showing the loading state of the disk tray with the outer casing cover removed.

FIG. 9 is a longitudinal sectional view showing an unloaded state of the disk tray.

FIG. 10 is a longitudinal sectional view showing a loading state of the disc tray.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk drive device, 8 ... Chassis, 17 ... Skew base, 18 ... Optical disk, 21 ... Optical pickup mechanism, 22 ... Skew adjustment mechanism, 23 ... Thread mechanism, 34 ... Guide shaft, 35 ... Carriage, 38 ... Skew sensor, 49: sled motor, 50: speed reduction mechanism

Claims (2)

[Claims] A carriage on which an optical pickup mechanism is mounted, a guide shaft for slidably supporting the carriage in a radial direction of the optical disc, a skew base on which the guide shaft is provided, and the skew base. A chassis rotatably supporting an axis orthogonal to the guide axis and parallel to the surface of the optical disk, as a rotation axis; a skew sensor for detecting whether or not the angle of the laser beam of the optical pickup with respect to the optical disk is appropriate; A disk drive device comprising: a skew adjustment mechanism that rotates a skew base with respect to the chassis based on a detection signal of a sensor; and a sled mechanism that moves the carriage in an axial direction of a guide shaft. A disk drive device characterized in that a sled motor is provided on a chassis. 2. The disk drive device according to claim 1, wherein a speed reduction mechanism of the sled mechanism is provided on the chassis.