JP2001216658A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To tilt/adjust the angle of the optical axis of an optical pickup to the recording surface of an optical disk not only in the radial direction but also in the tangential direction in spite of the reduction of the dimension in the width direction of an optical disk device by reducing the number of parts. SOLUTION: The optical pickup 43 is supported so as to move in the radial direction of the optical disk by two shafts in total of each one of a guide shaft 42 and a lead screw 44 arranged in a second chassis, and also the angles of both shafts to a first chassis 22 in which a spindle motor 24 is arranged are independently adjusted. Thus, the dimension in the width direction of the device is miniaturized and the device is advantageous in cost as well that much more because of a small number of parts as compared with a conventional device in which the optical pickup is supported by two shafts and also which necessitates the lead screw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an optical disk device, and more particularly to an optical disk device mounted on an electronic device such as a personal computer for recording and reproducing various optical disks.

[0002]

2. Description of the Related Art An optical disk recording / reproducing device mounted on an electronic device such as a personal computer (hereinafter referred to as an optical disk device).
Recently, there has been a shift from a CD-ROM drive to a DVD-ROM drive that can read CD-based discs and can also handle high-density and high-capacity recording discs. Generally, if the recording surface of an optical disk mounted on a turntable of an optical disk device is tilted with respect to the optical axis of an optical pickup, jitter deteriorates and the reading performance of a drive device is hindered. Therefore, mechanical considerations have been made to maintain a posture in which the optical axes of the optical pickups are orthogonal. In particular, DVD
In a (digital video drive) device, since a DVD-ROM as a recording medium has a high density and a high capacity, a numerical aperture NA (NA) of an objective lens of an optical pickup is required.
Is set to be larger than the numerical aperture (NA value) of the objective lens of the optical pickup for the CD-type disc. For this reason, even if the optical axis of the optical pickup is slightly inclined with respect to the recording surface, the jitter is greatly deteriorated, and the recording / reproducing ability is reduced. For this reason, an optical disk device for DVD-ROM requires a tilt adjusting mechanism for improving jitter. As a conventional optical disk device having the tilt adjusting mechanism, there is one disclosed in Japanese Patent Application Laid-Open No. H11-203801.
As shown in (b), a spring 14 is provided between a pair of parallel guide shafts 6 for guiding the optical pickup unit 5 and the chassis 2, and the guide shaft 6 urged upward by the spring 14 and held down is provided on the chassis. Adjusting screw 15 screwed into 2
And secured by the seat 15a. When the adjustment screw 15 is rotated, the height of the end of the guide shaft 6 pressed by the spring 14 against the seat 15a changes. Further, since one end of each guide shaft 6 is fixed by the guide shaft support member 12, when the adjustment screw 15 is rotated, the adjustment screw 15
The end on the side can be turned up and down to change the relative angle with the chassis 2. Therefore, the adjustment can be performed until the surface of the disk placed on the turntable 4 and the optical axis of the optical pickup 5 supported by the guide shaft 6 become perpendicular. Reference numeral 3 denotes a spindle motor, 7
Is a lead screw, 11 is a traverse motor, and 13 is a guide shaft support member on the other end side.

However, the tilt mechanism shown in this optical disk device is a mechanism for adjusting the inclination angle of a pair of guide shafts 6 supporting the optical pickup 5, and separately from these, a lead screw 7, a motor 11, and a not shown. A moving means composed of gears and the like is required, and the reduction in the number of components and the size reduction of the device in the width direction (the direction orthogonal to the axial direction of the guide shaft) are insufficient. The adjusting mechanism fixes the inner circumference of the pair of guide shafts 6 on the inner circumference of the optical disc and the adjustment mechanism is provided on the outer circumference of the disc, so that the optical axis angle of the optical disc in the radial direction can be adjusted.
There is a disadvantage that it is difficult to adjust the optical axis of the optical disk in the tangential direction. Further, in order to reduce the size of the optical disk device, it is necessary to provide the tilt adjustment mechanism within a projection range of the optical disk mounted on the turntable. In this case, the optical disk is rotated while reproducing signals. Tilt adjustment cannot be performed from the optical disk surface direction. Further, it is impossible to perform this operation from the gap between the optical disk and the chassis 2.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and it has been made possible to reduce the number of components to reduce the width of an optical disk apparatus, and at the same time, the optical axis of an optical pickup with respect to the recording surface of an optical disk. It is an object of the present invention to provide an optical disk device capable of adjusting the tilt of not only the radial direction but also the tangential direction.
That is, according to the first aspect of the present invention, the optical pickup is supported movably in the radial direction of the optical disk by a total of two guide shafts and lead screws disposed on the second chassis, and the spindle motor is disposed. The first
The angle of both axes with respect to the chassis can be adjusted individually, so that the optical pickup can be supported by two axes and the width of the device can be reduced in size compared to the conventional device that requires a lead screw. The lower the score, the more advantageous in terms of cost. According to the second aspect of the present invention, the adjustment mechanism can be realized with a simple configuration, and the adjustment mechanism having a single pivot portion as a fulcrum is provided at each of the guide shaft side and the lead screw side. The optical axis can be arbitrarily adjusted not only in the radial direction but also in the tangential direction. According to a third aspect of the present invention, the tilt adjusting mechanism of the second aspect is provided within a projection range of the optical disc supported by the spindle motor, and a projection or a hole is provided on a surface opposite to the inclined surface of the adjusting member having the inclined surface. Since the notch corresponding to the locus of the protrusion or the hole is provided in the first chassis, the tilting is performed while the optical disc is mounted and the signal is reproduced while the adjusting means is provided within the projection range of the optical disc. Since the adjustment can be performed from the back side of the first chassis, it can contribute to downsizing of the device. Claim 4
In the invention, the contact portion provided on the second chassis is provided integrally with a guide shaft for supporting and moving the optical pickup and a bearing member for fixing the lead screw, and the contact portion has a tip portion. Since the protrusion or hole of the adjusting member is provided at a predetermined radial position of the center of rotation of the adjusting member, the structure of the abutting portion is simplified, so that cost is not increased, and the abutting portion is Due to the substantially spherical shape, point contact is made with the inclined surface, so that frictional force can be reduced and adjustment can be performed smoothly. The adjustment member also has a hole or a projection for movement at a predetermined radius position of the center of rotation, so that the adjustment is smooth. Therefore, it is possible to provide an adjustment mechanism that can perform the tilt adjustment smoothly at a low cost.

[0005]

In order to solve the above-mentioned problems,
According to the first aspect of the present invention, there is provided a spindle motor for supporting a central portion of an optical disc and rotating the same, a first chassis for supporting the spindle motor, and a light for emitting light to a recording surface of the optical disc rotated and driven by the spindle motor. A pickup, a guide shaft that supports the optical pickup and guides movement in the radial direction of the optical disc, and a lead screw that is arranged in parallel with the guide shaft and rotationally drives and moves the optical pickup while supporting the optical pickup. , A second chassis that supports these components and is assembled to the first chassis.
An adjusting mechanism is provided at a position near the guide shaft and at a position near the lead screw, and by operating each adjusting mechanism, the guide shaft or the lead screw is moved up and down with the pivot provided at another position as a fulcrum. Characterized in that it is configured to be moved. According to a second aspect of the present invention, the adjusting mechanism is configured such that the adjusting mechanism loosely fits on the outer periphery of the supporting member protruding from the first chassis and rotates around the supporting member, and the adjusting mechanism projects downward from the second chassis side. A contact portion that is provided and abuts on the upper surface of the adjustment member at the distal end, and an elastic member that urges the second chassis away from the adjustment member, and has a circumferential surface on the upper surface of the adjustment member. A guide shaft mounted on the second chassis by a relative height moving along the inclined surface when the adjusting member is rotated. And the lead screw moves up and down. The invention according to claim 3 is characterized in that the adjustment mechanism is provided within a projection range of the optical disk supported by the spindle motor, and a projection or a hole is provided on a bottom surface of the adjustment member, and the movement of the projection or the hole is performed. An arcuate slit is formed on the first chassis surface along the locus. In the invention according to claim 4, each of the contact portions is integrated with a guide shaft fixing member fixed to the second chassis and a lead screw bearing member, respectively.
The distal end of each contact portion has a substantially spherical shape.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical disk drive according to the present invention will be described in detail with reference to embodiments shown in the drawings. FIG. 1 is an exploded perspective view showing the structure of the optical disk device of the present invention, and FIG.
FIG. 3 is a perspective view of the assembled optical disk device as viewed from above, and FIG. 3 is a perspective view of the optical disk device as viewed from below. The optical disk device 21 includes a CD-ROM, a CD-R, a CD-R
It is a device for recording and reproducing optical disks such as W and DVD-ROM, and is mounted on a device body such as a personal computer (not shown). The optical disk device 21 includes a first chassis 22
And a second chassis 41 assembled above the first chassis 22, and parts assembled to each of the chassis 22, 41. On the first chassis 22 side, a spindle motor 24 that is assembled and fixed along a reference pin 23 that is erected and fixed on the installation surface on the first chassis 22 in advance, and on a peripheral projection surface of the first chassis 22 First to third fastening holes 25a, 25 provided at three places
b, 25c and concentric arc-shaped slits 26 formed through the outer diameter sides of the first and third fastening holes 25a, 25c, respectively.
a, 26c and the first to third fastening holes 25a, 25b,
First to third support pins (support members) 27a, 27b, and 27c each having a lower end press-fitted and fixed to 25c;
Center holes 28a ', 28c' are loosely fitted around the outer circumferences of the first and third support pins 27a, 27c, and are seated on the upper surface of the first chassis 22. Adjusting members 28a, 28c fitted or corresponding to the slits 26a, 26c;
Support pins 27a, 27c protruding upward from the center hole of
Springs (elastic members) 29a, 2 fitted around the outer periphery of
9c are arranged. Reference pin 23, each fixing hole 25a
To 25c, slits 26a, 26c, support pin 27a
To 27c, adjusting member 28, coil springs 29a, 29c
Are the adjusting mechanism 30a, the pivotal support (rotation fulcrum, swing fulcrum) 3
0b and the adjusting mechanism 30c.

The adjusting mechanism 30a includes a guide shaft 42, which will be described later.
And the guide shaft 4 with the pivot 30b as a fulcrum.
It functions to tilt the two sides up and down (optical axis adjustment in the tangential direction of the optical disk). The adjusting mechanism 30c is arranged on the lead screw 44 side described later, and functions to tilt the lead screw side vertically with the pivot 30b as a fulcrum (optical axis adjustment in the radial direction). Each of the adjustment members 28a and 28c is a cylindrical body having an inclined surface inclined in the circumferential direction on the upper surface. In this embodiment, the adjustment members having the same shape can be used for the two adjustment mechanisms 30a and 30c. Second
On the chassis 41 side, a guide shaft 42 as a guide means for moving the optical pickup 43 in the opposite radial direction of the mounted optical disc, and an optical pickup 43 which is disposed in parallel with the guide shaft 42 and driven to rotate. Is supported. Further, on the lower surface of the second chassis 41, a guide shaft fixing member 45 that rotatably supports both ends of the guide shaft 42 in the axial direction, a pivot support fastening member 50 that is fastened to the pivot support 30b, and a lead screw drive Motor 55, gear group 56, lead screw bearing member 57, lead screw support member 58
However, they are fixed or operably assembled with screws or the like. Receiving holes 60a, 60b, 60c are formed in three places of the second chassis 41 corresponding to the adjusting mechanisms 30a, the pivots 30b, and the adjusting mechanism 30c, respectively, and the receiving holes 60a, 60b, 60c are formed. The first and second chassis 22 and 41 are fixed by screwing the fixing screws 61 into the respective shaft holes of the first to third support pins 27a, 27b and 27c via the. The lead screw 44, the motor 55 for driving the lead screw, the gear group 56, the lead screw bearing member 57, and the lead screw support member 58 constitute a moving unit 62.
The guide shaft fixing member 45 has shaft end support portions 70 at both ends in the longitudinal direction, and a concave portion for receiving and supporting the adjusting mechanism 30a in an intermediate portion of a long member connecting the shaft end support portions 70. 71. Each shaft end support 70 is provided with a guide shaft 42.
, And a guided portion 43 a provided at one end of the optical pickup 43 is fitted to the guide shaft 42. A guided portion 43 provided at the other end of the optical pickup 43
b is a hole having a female screw portion, and the lead screw 44
Into the threaded portion on the outer peripheral surface. Therefore, the optical pickup 43 can move forward and backward along the guide shaft 42 and the lead screw 44 by the forward / reverse rotation of the lead screw 44. Details of the relationship between the recess 71 and the adjustment mechanism 30a, the assembled state, and the like will be described later.

The other end (front end) of the lead screw 44
Is rotatably supported by a shaft hole 57 a of a bearing member 57 and receives a driving force transmitted from a motor 55 via a gear group 56. The bearing member 57 has a recess 80 for receiving and supporting the adjustment mechanism 30c. Recess 8
The details of the relationship between 0 and the adjusting mechanism 30a, the assembled state, and the like will be described later. The pivot supporting member 50 has a lead screw supporting member 58 rotatably supporting one end (rear end) of the lead screw at one end thereof, and a concave portion for receiving and supporting the pivot supporting portion 30b at the other end. 85. The details of the relationship between the recess 85 and the pivot 30b, the assembled state, etc. will be described later. FIG. 2 is a top perspective view of the optical disk device in which the above components have been assembled by the above procedure. FIG. 4A is a cross-sectional view showing a specific configuration of the adjusting mechanism 30a, the pivot 30b, and the adjusting mechanism 30c.
These are described in (b) and (c), respectively. FIG. 3 is a bottom perspective view of the optical disk device shown in FIG. 2. The slits 26 a and 26 c are exposed on the bottom surface of the first chassis 22. Each adjusting member 30a, 30c is operated by manually rotating each adjusting member by an arbitrary angle using a projection or a hole on the bottom surface of each adjusting member 28a, 28c exposed from each slit 26a, 26b. The height of the guide shaft 42 and the lead screw 44 with respect to the first chassis 22 is changed so that the attitude of the optical pickup 43 supported by the guide shaft 42 and the lead screw 44, that is, the light is emitted from the objective lens of the optical pickup 43. The angle of the optical axis of the (incident) light can be finely adjusted.
That is, in this embodiment, the optical pickup 43 supported by the two axes of the guide shaft 42 and the lead screw 44 arranged on the second chassis 41 is adjusted in angle with respect to the first chassis 22 to which the spindle motor 24 is fixed. Since the configuration is such that the optical pickup is supported by two guide shafts and further driven by a lead screw as in the prior art, the width dimension of the apparatus can be reduced, and the number of parts can be reduced. The optical disk device is also advantageous in terms of cost because of the small number of optical disks. Next, the configuration of each adjustment mechanism and the pivot portion will be described with reference to FIG. That is, FIG.
3 is a sectional view taken along line AA of the adjusting mechanism 30a shown in FIG. 2, (b) is a sectional view taken along line BB of the pivot 30b, and (c) is a sectional view taken along line CC of the adjusting mechanism 30c.

First, the adjusting mechanism 30a shown in FIG.
The center hole 28a 'of the adjusting member 28a is loosely fitted around the outer periphery of the support pin 27a having the projection at the tip pressed into the fixing hole 25a provided in the first chassis 22, and the projection 31a on the lower end face is It has a configuration protruding downward from the slit 26a. In addition, the upper part of the support pin 27a is
Is loosely fitted to a hole 71a provided on the bottom surface of the support pin 27a so as to be movable up and down, and an external thread portion of a fixing screw 61 is screwed into a screw hole provided on an upper end surface of the support pin 27a. A coil spring 29a is fitted and compressed between the lower surface of the concave portion 71 of the guide shaft fixing member 45 and the upper surface of the adjusting member 28a. Therefore, the first and second chassis 22, 41 are connected via the support pin 27a and the fixing screw 61, and the second chassis 41 is elastically urged upward. Further, since the upper outer peripheral surface of the support pin 27a and the hole 71a of the concave portion 71 are in a loosely fitted state, the second chassis 41 can be displaced downward against the spring 29a. Further, an abutting portion 72 having a curved end is projected from an appropriate position on the bottom surface (peripheral edge excluding the center portion) of the concave portion 71 provided on the guide shaft fixing member 45. Is the adjusting member 28
a abuts on the inclined surface formed on the upper surface. Adjusting member 28
By operating the protrusion 31a protruding from the bottom surface of the first chassis 22 along the slit 26a, the position on the inclined surface with which the contact portion 72 contacts changes, so that the contact portion 72 moves up and down. As the guide shaft fixing member 45 moves up and down, the guide shaft 42 whose both ends are supported by the guide shaft fixing member 45 moves up and down. Since this vertical movement is performed with the pivot portion 30b as a fulcrum, the guide shaft side of the optical pickup 43 moves up and down, and the angle of the optical axis from the objective lens of the optical pickup 43 is adjusted in the tangential direction. . Since the tip of the contact portion 72 has a substantially spherical shape, it comes into point contact with the inclined surface of the upper surface of the adjusting member, and the frictional force between them is reduced, so that the adjustment can be performed smoothly. Further, since the arc-shaped slit 26a has a concentric shape with the adjusting member 28a, the turning operation of the adjusting member using the projection 31a is also facilitated. Next, the pivots (rotation fulcrum, swing fulcrum) 3 shown in FIG.
0b is a second fastening hole 25 provided in the first chassis 22.
b, a hole 85a provided in the center of the bottom surface of the concave portion 85 of the pivot support member 50 is loosely fitted on the outer periphery of the second support pin 27b having the lower projection crimped and fixed, and a screw provided on the upper end surface of the support pin 27b. It has a configuration in which the external thread of the fixing screw 61 is screwed into the hole. In addition, a pivoting projection 86 protrudes from an edge of the lower bottom surface of the recess 85, and is in contact with the upper surface of the first chassis 22. The second chassis 41 integrated with the pivot portion fastening member 50 is connected to the first and second adjustment mechanisms 30.
When the a and 30c move up and down, the pivot projection 86 and the first
Up and down (rotation,
Swing).

Next, the adjusting mechanism 30c shown in FIG.
The center hole 28c 'of the adjustment member 28c is loosely fitted around the outer periphery of the third support pin 27c having the tip protrusion press-fitted and fixed in the third fastening hole 25c provided in the first chassis 22, and It has a configuration in which the projection 31c on the lower end surface is projected downward from the slit 26c. The upper portion of the support pin 27c is loosely fitted in a hole 80a provided in the center of the bottom surface of the recess 80 so as to be movable up and down relatively. The screw portion is screwed.
A coil spring 29c is fitted and compressed between the lower surface of the concave portion 80 of the lead screw bearing member 57 and the upper surface of the adjusting member 28c. Therefore, the first and second chassis 22, 41 are connected via the support pin 27c and the fixing screw 61, and the second chassis 41 is elastically urged upward. Further, since the upper outer peripheral surface of the support pin 27c and the hole 80a of the recess 80 are in a loosely fitted state, the second chassis 41 can be displaced downward against the spring 29c. In addition, a proper position on the bottom surface of the recess 80 provided in the lead screw bearing member 57 (peripheral edge excluding the center)
A protruding contact portion 81 having a curved end is provided on the adjustment member 28c, and the contact portion 81 contacts an inclined surface formed on the upper surface of the adjustment member 28c. The slit 2 is operated by operating the protrusion 31c of the adjusting member 28c protruding from the bottom surface of the first chassis 22.
By rotating along 6c, the position on the inclined surface with which the contact portion 81 contacts changes, so that the contact portion 81 moves up and down,
Since the lead screw bearing member 57 moves up and down, the lead screw 44 whose other end is supported by the lead screw bearing member 57 moves up and down. Since this vertical movement is performed with the pivot 30b as a fulcrum, the optical pickup 4
3, the lead screw side moves up and down, and the angle of the optical axis from the objective lens of the optical pickup is adjusted in the radial direction. Since the tip of the contact portion 81 has a substantially spherical shape, it comes into point contact with the inclined surface on the upper surface of the adjustment member, and the frictional force between the two is reduced, so that the adjustment can be performed smoothly. Also, an arc-shaped slit 2
Since 6c has a concentric shape with the adjusting member 28c, the turning operation of the adjusting member 28c using the projection 31c is also facilitated.

FIGS. 5A and 5B show the adjustment members 28a and 28a.
8C is a perspective view and a bottom view showing the configuration of 8c, and each of the cylindrical adjusting members 28a and 28c has the same configuration and can be shared by both adjusting mechanisms 30a and 30c. One inclined surface 28a "is an inclined surface with which the contact portion 72 constituting the adjusting mechanism 30a is in contact. The other inclined surface 28c" is an inclined surface with which the contact portion 81 constituting the adjusting mechanism 30c is in contact. It is. The inclined surfaces 28a "and 28c" are arranged so as to have a symmetrical shape. Further, as shown in (b), a projection 31 is provided at a predetermined radial position from the center of each adjustment member on the bottom surface.
a, 31c or hole (depth about 1 mm) 31a ', 31
c 'is provided. The projections 31a and 31c are loosely fitted in the respective arc-shaped slits 26a and 26c as described above, and grip the projections to rotate the adjustment members 28a and 28c. When the holes 31a 'and 31c' are formed instead of the projections, a jig or the like (not shown) is inserted into the holes to perform the rotation operation. When the optical disk is mounted on the shaft (or turntable) of the spindle motor 24, each adjusting mechanism 30a,
The projection 30a is located within the projection range concealed by the optical disc as shown in FIG. 3, but is provided on the bottom side of the optical disc apparatus as a projection 31a, 31c or a hole (about 1 mm in depth) as a means for adjustment. Since there are provided 31a 'and 31c', tilt adjustment while reproducing signals by rotating the optical disk can be performed from the back side of the first chassis. Therefore, it is not necessary to increase the size of the chassis in order to provide the adjustment mechanism outside the projection range of the optical disk, and the device can be downsized. In the above embodiment, the guide shaft 42
One adjusting mechanism 30a is provided at an outer position corresponding to the central portion in the longitudinal direction, and the other adjusting mechanism 30c is provided at an outer front position of the lead screw 44. Further, the adjusting mechanism 30c
A pivot 30b is provided at an appropriate position behind the vehicle. However, this is an example, and the arrangement position can be variously changed. For example, one adjusting mechanism is provided at a position outside the central portion in the longitudinal direction of the lead screw 44, and the other adjusting mechanism is connected to the guide shaft 4.
2 may be provided at the front outer position, and the pivot portion may be disposed at an appropriate position behind the other adjusting mechanism. The present invention having the above-described configuration provides a CD-ROM, a CD-R, a CD-RW, a DVD-R
The present invention is applicable to various optical disk recording / reproducing devices such as OM. In particular, in a DVD recording / reproducing apparatus, since a DVD-ROM as a recording medium has a high density and a high capacity, the numerical aperture NA (NA value) of an objective lens of an optical pickup is
It is set to be larger than the numerical aperture (NA value) of the objective lens of the optical pickup for CD-type discs. Even if the optical axis of the optical pickup is slightly inclined with respect to the recording surface, the jitter deteriorates greatly, Although there is a problem that the reproduction ability is reduced, if the tilt adjustment mechanism of the present invention is used,
Jitter can be improved without increasing the number of parts and increasing the size of the shape.

[0012]

As described above, according to the present invention, if the angle of the optical axis of the optical pickup with respect to the recording surface of the optical disk is limited only in the radial direction while reducing the number of components to reduce the width direction size of the optical disk device. In addition, the tilt can be adjusted in the tangential direction. That is, claim 1
In the invention, the optical pickup is supported movably in the radial direction of the optical disk by a total of two guide shafts and a lead screw arranged on the second chassis, and the first motor is provided with a spindle motor. Since the angle of both shafts with respect to the chassis can be adjusted individually, the width of the device can be reduced compared to the conventional device that supports the optical pickup with two shafts and requires a lead screw, and the number of parts Is also advantageous in terms of cost. According to the second aspect of the present invention, the adjustment mechanism can be realized with a simple configuration, and the adjustment mechanism having a single pivot portion as a fulcrum is provided at each of the guide shaft side and the lead screw side. The optical axis can be arbitrarily adjusted not only in the radial direction but also in the tangential direction. According to a third aspect of the present invention, the tilt adjusting mechanism of the second aspect is provided within a projection range of the optical disc supported by the spindle motor, and a projection or a hole is provided on a surface opposite to the inclined surface of the adjusting member having the inclined surface. Since the notch corresponding to the trajectory of the protrusion or hole is provided in the first chassis, the tilt while mounting the optical disk and reproducing the signal is provided even when the adjusting means is provided within the projection range of the optical disk. Since the adjustment can be performed from the back side of the first chassis, it can contribute to downsizing of the device. According to a fourth aspect of the present invention, the contact portion provided on the second chassis is integrally provided on a guide shaft for supporting and moving the optical pickup and a bearing member for fixing the lead screw, and the contact portion is Since the distal end has a substantially spherical shape and the protrusion or hole of the adjusting member is provided at a predetermined radius position of the center of rotation of the adjusting member, the structure of the abutting portion is simplified, and the cost is not increased. Since the contact portion has a substantially spherical shape, it comes into point contact with the inclined surface, so that frictional force can be reduced and adjustment can be performed smoothly. The adjustment member also has a hole or a projection for movement at a predetermined radius position of the center of rotation, so that the adjustment is smooth. Therefore, it is possible to provide an adjustment mechanism that can perform the tilt adjustment smoothly at a low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of an optical disk device of the present invention.

FIG. 2 is a perspective view of the optical disc apparatus of the present invention in an assembled state as viewed from above.

FIG. 3 is a perspective view of the optical disc of the present invention as viewed from below.

4 (a), (b) and (c) are sectional views taken along lines AA, BB and CC of FIG.

FIGS. 5A and 5B are a perspective view and a bottom view of an adjusting member.

6A and 6B are a configuration diagram and a cross-sectional view of a conventional example.

[Explanation of symbols]

21 optical disk device, 22 first chassis, 23
Reference pin, 24 spindle motor, 25a, 25b,
25 fastening holes, 26a, 26c concentric arc-shaped slits, 27a, 27b, 27c support pins (support members),
28a, 28c adjusting member, 28a ', 28c' central hole, 29a, 29c coil spring (elastic member), 30
a, 30c adjustment mechanism, 30b pivot (rotational fulcrum, swing fulcrum), 41 second chassis, 42 guide shaft, 4
3 Optical pickup, 44 Lead screw, 45
Guide shaft fixing member, 50 pivot portion fastening member, 55 lead screw driving motor, 56 gear group, 57 lead screw bearing member, 58 lead screw support member, 60a, 60b, 60c receiving hole, 62 moving means, 70 shaft end Supporting part, 71 concave part, 80 concave part, 85 lead screw support member.

Claims (4)

[Claims] 1. A spindle motor that supports and rotates a central portion of an optical disk, a first chassis that supports the spindle motor, and a light that emits light to a recording surface of the optical disk that is rotationally driven by the spindle motor. A pickup, a guide shaft that supports the optical pickup and guides movement in the radial direction of the optical disc, and a lead screw that is arranged in parallel with the guide shaft and rotationally drives and moves the optical pickup while supporting the optical pickup. , A second chassis supporting these components and assembled to the first chassis;
An optical disc device comprising: an adjustment mechanism provided at a position near the guide shaft and a position near the lead screw, and by operating each adjustment mechanism, a pivot portion provided at another position is used as a fulcrum, An optical disc device characterized in that a guide shaft or a lead screw is moved up and down. 2. The adjusting mechanism according to claim 1, wherein the adjusting mechanism is loosely fitted on an outer periphery of a supporting member protruding from the first chassis and rotates around the supporting member, and protrudes downward from the second chassis. And a resilient member for urging the second chassis away from the adjustment member in a direction in which the second chassis is separated from the adjustment member. A guide shaft and a lead mounted on the second chassis by providing an inclined surface having a variable height, wherein the abutting portion relatively moves along the inclined surface when the adjusting member is rotated. 2. The optical disk device according to claim 1, wherein the screw moves up and down. 3. The adjustment mechanism is provided within a projection range of an optical disk supported by the spindle motor, and a projection or a hole is provided on a bottom surface of the adjustment member, and a movement trajectory of the projection or the hole is provided. 3. The optical disk device according to claim 1, wherein an arc-shaped slit is formed in the first chassis surface along the first and second chassis surfaces. 4. Each of the contact portions is integrated with a guide shaft fixing member fixed to the second chassis and a lead screw bearing member, respectively, and the tip of each contact portion has a substantially spherical shape. 4. The optical disk device according to claim 2, wherein: