JP2000306320A - Drive apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the positioning precision and the attachment stiffness of a spindle motor by providing a sliding means substantially in parallel to the surface of an adjustment plate and forming a sliding section that has a peripheral portion against which another portion of energizing means is allowed to slide. SOLUTION: In a ring 600, an adjustment plate 500 which is a thin plate of a spring material is fixed to a spindle motor 400 with an adjustment screw 501, and a V-shaped groove is provided as a sliding section at the axial section 401 of the spindle motor 400 in the outer periphery of a low-friction resin material. This ring 600 function as a sliding means disposed substantially perpendicular to the axial center of the axial section 401 and provided at the peripheral section with the V-shaped groove against which a portion of energizing means is allowed to slide. Projections 502 and 503 as an engagement section are provided at two positions on the adjustment plate 500. The center portion of a wire spring suspended therebetween as the energizing means is engaged into the V-shaped groove of the ring 600, and the wire spring is allowed to be sagged by a predetermined length. Thus, the wire spring is configured to apply a side pressure against the axial section 401 of the spindle motor 400.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an optical pickup and a spindle motor to perform high-precision adjustment so that an optimum operation of recording or reproduction can be performed for all data areas from the inner circumference to the outer circumference of a disk. The present invention relates to a driving device that can be used.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a perspective view showing a main part structure of a conventional spindle motor adjusting device disclosed in Japanese Patent Application Publication No. 3 (Microfilm of Japanese Utility Model Application No. 63-59016), and a conventional technology will be described with reference to FIG. In FIG. 12, reference numeral 1 denotes a spindle motor having a shaft portion, reference numeral 2 denotes a high-rigidity motor base on which the spindle motor 1 is mounted by mounting screws 21, and reference numeral 3 denotes a chassis base for fixing the motor base.

A mounting hole 31 and a through hole 32 are formed in the chassis base 3, and a pivot shaft 33 protrudes downward on the side facing the spindle motor 1. Here, the tip of the pivot shaft 33 is formed in a conical shape and fits with the support hole 22 of the motor base 2, and this support hole 22 is a pivot bearing.

[0004] When assembled, the spindle motor 1
The motor base 2 is fixed to the chassis base 3, and the biasing force is loaded and held on the chassis base 3 by the coil spring 4 and the set screw 5. When the shaft inclination of the spindle motor 1 is adjusted, the motor base 2 is screwed. The stopped screws 6, 7 were adjusted to rotate.

[0005]

Since the conventional driving device is configured as described above, the adjustment displacements in the two directions A and B affect each other, and the adjustment cannot be completed independently. It was indispensable to work on the task of making adjustments repeatedly.

Further, since the height of the spindle motor rises and falls with respect to the fulcrum, the distance between the optical pickup and the disk fluctuates even if an optimum angle is obtained. There was a problem that occurred.

Further, since the position in the in-plane direction of the disk is not determined, the laser focus point of the optical pickup and the position of the radial line of the disk do not accurately coincide with each other. In a drive device in which laser beam tracking deviates from an information track due to a difference in track curvature between the inner and outer circumferences, and a drive device that mechanically determines the innermost position of an optical pickup, the innermost circumference information of a disk is There was a problem that the first reproduction could not be performed and a malfunction occurred.

Further, since the holding structure is weak in rigidity via a coil spring, the spindle motor portion easily vibrates with respect to the base, and the vibration is transmitted to the disk being held and rotated. Disconnection has occurred. In addition, when the shaft runout of the drive shaft of the spindle motor is large, the disk surface tilt fluctuation and the surface runout due to the rotation of the spindle motor occur, which lowers the playability of the optical disk device. DVD for use in vehicles with severe conditions
However, there has been a problem that it is difficult to secure sufficient performance and reliability in an optical disk device for use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a simple structure to obtain a drive device which can improve the positioning accuracy of a spindle motor and improve the mounting rigidity. With the goal.

[0010]

A driving device according to the present invention has a driving means having a shaft, an urging means for applying a predetermined urging force in a direction substantially perpendicular to the shaft, and a driving means.
An adjusting plate having a locking portion for locking a part of the urging means;
A base for supporting the adjusting plate, an angle adjusting means provided on the adjusting plate for adjusting a mounting angle of the driving means, and a shaft provided substantially parallel to a surface of the adjusting plate, and a biasing means provided on a peripheral edge portion And a sliding contact means having a sliding contact portion with which another part slides.

The sliding contact portion is formed in a groove shape.
One end and the other end of the biasing means are locked to the locking portion of the adjustment plate,
A part of the urging means is disposed so as to be in sliding contact with the groove.

The base has a support portion for supporting two portions of the adjustment plate, and the adjustment plate is disposed closer to the base than the support portion.

In addition, a hole is provided substantially in the center of the adjusting plate, and an adjusting screw fitted into the hole and having a tip abutting on the base is provided, and the angle of the adjusting plate is adjusted by adjusting the adjusting screw. It is like that.

Also, a turntable for mounting and rotating the disk, a pickup for reading recorded information of the disk, a transfer means for transferring the pickup along the disk radial direction of the disk, and guiding the transfer of the transfer means. A guide means is provided, and the guide means is supported and fixed at a predetermined position near a fulcrum of the angle adjusting means to set the position and orientation of the pickup.

The pickup is provided with a mechanism for independently adjusting the angle in a direction substantially perpendicular to the radial direction of the disk.

Further, the urging means is formed of a wire spring material, the cross-sectional shape of the sliding contact portion is formed in a cylindrical surface, and the engaging height at the engaging portion between one end and the other end of the urging means is respectively set. It is different.

Further, a coil winding part is formed in a part of the biasing means.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a main part top view showing the upper surface of the main part of the drive device according to the first embodiment of the present invention, and FIG. 2 is the main part bottom view showing the lower surface of the main part of the drive device according to the first embodiment of the present invention. FIG. 3 is a side view showing details of a main part structure, and FIG. 4 is a main part sectional view showing a main part cross section of FIG.

FIG. 5 is a top view showing the structure of the turntable in detail, FIG. 6 is a top view showing a side pressure mechanism with the turntable 204 omitted, and FIG. 7 is a top view showing the side pressure mechanism before assembly.

FIG. 8 is a state diagram showing a state before the angle adjustment in the radial direction of the main part of the disk device using the drive device of this embodiment. FIG. 9 is a view showing the main part in the radial direction shown in FIG. FIG. 7 is a state diagram showing a state after performing the angle adjustment of FIG. FIG. 10 is a state diagram showing a state before the angle adjustment in the tangential direction of the main part of the disk device using the drive device. FIG. 11 shows the angle adjustment in the tangential direction of the main part shown in FIG. It is a state diagram which shows the state after.

In FIG. 1, reference numeral 100 denotes a floating deck provided inside a disk (particularly, an optical disk such as a CD or DVD) using a drive device. A lock mechanism (not shown) locks the casing (not shown), and when the disk D is inserted, the lock mechanism is released, so that the lock with the casing is released, and a spring (not shown) and a damper are provided. (Not shown) only.

With such a structure, vibrations and shocks from the outside of the vehicle or the like can be sufficiently mitigated, so that the disk can be reproduced even under a condition of high vibration such as during running.

Reference numeral 200 denotes a turntable which is fitted on a shaft 401 of a spindle motor 400 (to be described later) and on which a disk D is placed. The inserted disk D is turned by a loading mechanism (not shown). It is conveyed up and fixed at a predetermined position on the turntable 200 by a clamp mechanism (not shown) that interlocks with the loading mechanism and clamps the disc.

Reference numeral 300 denotes an optical pickup provided on the floating deck section 100 and mounted on the base 10 as a chassis. The optical pickup 300 and a main guide shaft 301 having a spiral groove are provided with a spring member 302 having a claw. It is comprised so that it may join. The optical pickup 300 is configured to move at a high speed from the innermost circumference to the outermost circumference of the disk D by pivoting.

The objective lens 303 provided in the optical pickup 300 performs focusing control and tracking control, thereby optimizing a laser converging point on an information track on the disk D where eccentricity and surface deflection occur. And data is reproduced without data loss.

Reference numeral 400 denotes a shaft mounted on the surface opposite to the surface on which the turntable 200 and the optical pickup 300 are provided, and the shaft 401 on which the turntable 200 is fitted.
Is a spindle motor as driving means having

In the optical pickup 300, the center locus of the objective lens 303 at the time of traversing is arranged so as to coincide with the radial center axis 1000 of the disk D to suppress the influence of the curvature difference on the inner and outer circumferences of the information track. It is configured to be. In addition, the tilt is adjusted so that the optical axis of the objective lens 303 is orthogonal to the data surface of the disk D at an arbitrary position on the inner and outer circumferences of the disk D.

Here, DVD (Digital Versatile Dis
c) will be described. DVD is a CD (Compact Dis
Since the size of the pits of the recorded data is smaller than that of c), the laser light is focused by a short wavelength laser and an objective lens having a large numerical aperture. For this reason, a slight change in the relative angle between the data surface of the disc and the optical pickup greatly affects the data reproduction performance. Therefore, the range of the angular accuracy at which the reproduction performance of the DVD can be ensured is 1/2 or less of the CD. It becomes severe and a tilt adjustment mechanism is required.

On the other hand, when reproducing a CD, the angle accuracy can be satisfied within the accuracy range of component assembly without providing a tilt adjusting mechanism.

Further, the deflection with respect to the shaft of the turntable 200, the deflection of the shaft 401 of the spindle motor 400, the warp of the disk D itself, and the optical pickup 300
Considering errors that increase the relative angle, such as the angle of the lens when shifting the objective lens 303, environmental conditions and vibration conditions are extremely severe, especially in a DVD device mounted on a vehicle, and the performance of the disk device and the disk itself is reduced. Varying factors increase. For this reason, the accuracy of general component assembly alone may narrow the playability range of various types of optical disks that are generally distributed, and it may not be possible to ensure high quality as a product of the optical disk device.

Further, in order to secure a sufficient playability range, it is necessary to adjust the angle. The spindle motor 400 can be tilted and adjusted in the radial direction, and the main guide shaft 301 of the optical pickup 300 is used as a support shaft in the tangential direction. Is also configured so that the inclination can be adjusted.

Reference numeral 600 denotes a spindle motor 400
An adjustment plate 500 made of a thin plate spring material is fixed with an adjustment screw 501, and a shaft 401 of the spindle motor 400 has a V groove 601 as a sliding contact portion on the outer periphery of a low friction resin material. The sliding contact means is provided substantially perpendicular to the axis of the portion 401, and has a V-groove 601 on the periphery thereof, to which a part of the urging means (described later) slides.

At two positions of the adjusting plate 500, projections 502 and 503 are provided as locking portions formed by cutting and raising, and a wire spring material 700 as an urging means is bridged. The center of the material 700 is
The shaft portion 40 of the spindle motor 400 is fitted by fitting into the groove 601 and bending the wire spring material 700 by a predetermined length.
1 is configured to apply a lateral pressure.

Further, the bottom of the V-groove 601 is
00 is formed in a cylindrical shape, and the height of the contact positions with the projections 502 and 503 with which the wire spring material 700 contacts is made different from each other, and the V spring 601 is slanted with respect to the cylindrical surface on the bottom surface of the V groove 601. I have to.

The base 10 has fulcrums 10a, 10b
Is provided. The shape of the fulcrums 10a and 10b is such that the contact point between the spindle motor 400 and the adjustment plate 500 is cylindrical, and the central axis forming the cylindrical surface is substantially parallel to the central axis 2000 in the tangential direction. Each fulcrum 1 intersects the central axis of the shaft 401
The heights of 0a and 10b were made the same.

The adjustment plate 500 is provided with a radial center axis 100 that passes through the shaft 401 of the spindle motor 400.
The leaf spring portions 710 having a symmetrical shape with respect to 0 and holes 711 and 712 are provided at the distal end portion of each leaf spring portion, and are fitted to the half piercing projections provided on the corresponding base 10 to form a flat surface. Positioning is performed, and a screw 713 is attached to the base 10 at a position symmetrical with respect to the central axis 1000 in the radial direction.
Fixed.

Further, the heights of the fulcrums 10a and 10b are fixed to the base 10 higher than the height fixed by the screws 713 of the leaf spring portion 710, and the fulcrums 10a and 10b are sandwiched between the fulcrums 10a and 10b. Is provided with a hole 714,
It is attached to the base 10 with an adjusting screw 501.

With the above configuration, the inclination amount of the spindle motor 400 is adjusted to correspond to the rotation amount of the adjustment screw 501, and a biasing force equal to or more than a predetermined force is obtained as a fixing force to the base 10. I have.

Further, as shown in FIGS. 6 and 7, a guide groove 715 for guiding when the spindle motor 400 is disposed on the adjusting plate 500 is provided, and an inclination angle of the guide groove 715 on the leaf spring portion 710 side. Are formed to form a triangular corner 716.

As shown in FIG. 3, FIG. 6, and FIG. 7, the wire spring material 700 partially has a coil winding portion 720, and the inner diameter of the coil winding portion 720 is The size is set so that it can be inserted and positioned.

Further, as shown in FIG. 2 and FIGS. 8 to 11, a part of the support member 504 on the spindle motor 400 side among the bearing portions supporting both ends of the main guide shaft 301 of the optical pickup 300 is formed by resin molding. The support member 504 is disposed at the position closest to the spindle motor 400 on the extension of the center line 2000 in the tangential direction through the center of the shaft portion 401 of the spindle motor 400. are doing.

As shown in FIG. 2, in the disk drive using the driving device of this embodiment, in addition to the adjustment mechanism of the spindle motor 400 in the radial direction, the main guide shaft 301 of the optical pickup 300 is centered. As a tangential direction tilt adjustment mechanism capable of tilt adjustment.

The tilt adjusting mechanism in the tangential direction includes a flat plate 801 having a length corresponding to a distance that the optical pickup 300 moves in the disk radial direction, a resin molding member 802, and an urging force for adjusting and fixing the angle. And a leaf spring 803 to be added.

The flat plate 801 has two fulcrums 80 parallel to the axis indicating the radial direction and on the base side.
4, 805, which are used as fulcrum for adjusting the inclination angle, and the adjusting screw 12 is provided at a position facing the point of action of the leaf spring 803.

Here, the principle of the angle adjustment in the radial direction will be briefly described with reference to FIGS.

In FIG. 8, the positional relationship between the disk D and the optical axis of the optical pickup 300 may be slightly shifted from the orthogonal state by an angle θR. This is because the floating deck portion 100 has a support member formed by resin molding of the main guide shaft 301 on the base 10, so that the accuracy of parts can be increased,
This is because the main guide shaft 301 is slightly tilted from a desired position due to the influence of flatness and mounting accuracy.

FIG. 8 is an explanatory view for explaining an inclined state of the base 10. In this figure, the base 10 has a flatness δR.
Shows the state in which the main guide shaft 301 has the inclination θR, that is, the state in which the optical axis of the optical pickup 300 and the disk R have the angle θR, and shows the state before the angle adjustment. ing.

FIG. 9 is a view showing a state after the inclination angle of the spindle motor 400 is adjusted by the radial angle adjusting mechanism with respect to the state of FIG. By adjusting the rotation of the adjusting screw 501, the adjusting plate 500 is tilted with respect to the fulcrums 10a and 10b, and the disc R is adjusted in parallel with the main guide shaft 301.
The relative angle θR between the optical pickup 300 and the disc R is eliminated.

Therefore, since the support position of the main guide shaft 301 on the spindle motor 400 side is on the axis of the fulcrum 10a, 10b, the disk D, the main guide shaft 301 and the optical pickup are in the position where the angle adjustment is completed. 30
A change in the relative distance from zero can be reduced.

Next, the principle of the angle adjustment in the tangential direction will be briefly described with reference to FIGS. FIG.
At 0, the disc D and the optical axis of the optical pickup 300 are slightly shifted from the orthogonal state by an angle θT. This is because, in the tangential direction, as in the radial direction, the height of the resin molding member 802, which can be said to be the sub-shaft with respect to the main guide shaft 301, is affected by the accumulation of component accuracy, flatness, and the effects of mounting accuracy. Is slightly displaced from the target.

FIG. 10 is an explanatory view for explaining the inclined state of the base 10. When the base 10 has a flatness δT, a difference occurs in the height of the resin molding member 802 with respect to the main guide shaft 301. Since the angle of the pickup 300 in the tangential direction is inclined about the main guide shaft 301, the disk D and the optical axis of the optical pickup 300 have an angle θT. This state shows a state before the angle adjustment.

FIG. 11 shows a tangential direction angle adjustment mechanism provided as a mechanism separate from and independent of the radial direction angle adjustment mechanism of this embodiment with respect to the state of FIG. This shows a state after the tilt angle of the pickup 300 has been adjusted. Here, adjusting screw 1
The relative angle θT between the disk D and the optical axis of the optical pickup 300 is eliminated by inclining the flat plate 801 with respect to the fulcrums 804 and 805 by adjusting the rotation of 2 and changing the height of the resin molding member 802. Have been.

Embodiment 2 Spindle motor 1 on adjustment plate
A similar effect can be obtained by providing a guide groove having a hole equivalent to the flange diameter of 2, a U-shaped corner, a triangular corner having an angle close to 90 degrees, or an arc corner.

As another embodiment, not shown,
A side pressure can be similarly obtained only by a straight line portion without a coil winding portion in a wire spring material. Further, the same effect can be obtained even if the projecting portion for bridging the wire spring material is formed of a separate member instead of being cut and raised from the adjustment plate.

Further, the fulcrum on the base side on which the adjusting plate is mounted is formed in a symmetrical position in the tangential direction passing through the center of the drive shaft of the spindle motor and is formed of a coaxial cylindrical surface, so that the adjusting plate can be adjusted. Is limited to only the radial direction, and the occurrence of the inclination in the tangential direction can be suppressed. Further, even in an optical disc apparatus having a two-way adjustment mechanism in the radial direction and the tangential direction, the adjustment can be performed in a minimum time because unnecessary mutual repetitive adjustment does not occur.

Further, the leaf spring portion of the adjusting plate is formed in a symmetrical shape with respect to the central axis in the radial direction, and the positioning and fixing portions with respect to the base are arranged at positions symmetrical with respect to the central axis in the radial direction. The generation of spring force can be made symmetrical, and the inclination direction of the spindle motor is limited to the radial direction only, and the inclination of the spindle motor in the tangential direction is limited by the fulcrum of the base symmetrical to the central axis in the radial direction. Generation can be suppressed. Since there is no tilt interference in other directions, high adjustment accuracy can be obtained.

Also, in an optical disc apparatus having a two-way adjusting mechanism in the radial direction and the tangential direction,
Since there is no mutual repetition adjustment, adjustment can be made in a minimum time.

Further, in relation to the height of the base mounting portion of the adjusting plate relative to the fixing surface of the leaf spring portion of the adjusting plate,
The height of the fulcrum is set high when viewed from the base side, and the adjustment point by screw rotation is provided at one point on the opposite radial center axis across the fulcrum, so that the biasing force exceeding a certain force can get.

Furthermore, the point of action of the biasing force can be arranged symmetrically with respect to the center of the rotating shaft with respect to the spindle motor, and can be supported at substantially the same distance from the center of gravity of the spindle motor. With high rigidity and high mounting rigidity, high reliability can be ensured even for an optical disk device having severe vibration conditions, particularly for use in a vehicle.

The adjusting plate is provided with a guide groove for assembling the spindle motor symmetrical with respect to the radial axis, and one of the grooves is opened, and the other is formed as a 90 ° triangular corner. The wire spring material can be easily hooked on the assembly member of the spindle motor to which the table is fixed in advance.

The procedure for assembling the adjusting plate with respect to the spindle motor is as follows. A wire spring material is laid over the adjusting plate in advance, and the assembly member of the spindle motor in which the ring with the V-groove and the turntable are mounted is attached. On the surface,
While sliding, insert until it hits a 90-degree triangular corner and fix it with a screw. The spindle motor can be positioned accurately with respect to the position reference of the adjustment plate, the deflection of the wire spring material can be obtained at the same time, the desired side pressure can be obtained for the spindle motor, and high reliability such as rotational life can be obtained. Can be

Further, since the adjusting plate can simultaneously press a 90 ° triangular corner for positioning the spindle motor and a positioning hole with respect to the base, a high positional accuracy can be easily secured, so that the laser focusing point and the radial direction of the disk can be secured. Can be accurately matched with each other, and the innermost data position of the disk can be accurately obtained.

In addition, the support position of the main guide shaft having a spiral groove for transferring the optical pickup is provided at the position closest to the center axis in the tangential direction passing through the center of the spindle motor. Therefore, the fluctuation of the relative distance between the optical pickup and the disk caused by the radial tilt adjustment can be minimized.

Further, in addition to the mechanism for adjusting the inclination of the spindle motor in the radial direction, a mechanism for adjusting the inclination of the optical pickup in the tangential direction is provided, and the adjustment functions in the radial direction and the tangential direction are separated and independent. The adjustment can be performed in the minimum process without interference due to the adjustment and without repetition.

[0065]

Since the present invention is configured as described above, it has the following effects.

Since the wire spring material for lateral pressure is fixed on the adjusting plate fixed to the driving means, by applying the optimal lateral pressure to the shaft portion, the rotation of the shaft portion can be restrained from rotating. The reliability of the driving means is improved and the device can be simplified.

Further, since the supporting portions of the urging means are provided at two positions, the support is stabilized, so that the vibration resistance is improved and the reliability of the device can be improved.

Further, since the supporting portion of the urging means is set at two places, the mounting position from the adjusting plate can be fixed, and the urging means can be arranged on the sliding contact means in a simple procedure. The assemblability is improved.

Further, since the sliding portion of the sliding contact means is formed in a cylindrical shape, the wire spring material can be disposed so as to be slanted and bridged. And the rotational life of the driving means can be improved, and the reliability of the device can be improved.

Also, since the adjusting plate is formed of a thin spring material,
Since the mounting portion of the driving means and the urging means can be integrated, the number of parts of the apparatus can be reduced and the space of the apparatus can be saved.

Further, since the coil winding portion is formed in a part of the wire spring material, two functions of the positioning function and the function of applying the side pressure can be obtained with one torsion spring form, so that a simple configuration can be obtained. Thus, the reliability of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a main part top view showing an upper surface of a main part of an optical disk device using a drive device according to a first embodiment of the present invention;

FIG. 2 is a bottom view of a main part showing a lower surface of a main part of an optical disk device using the driving device shown in FIG.

FIG. 3 is a side view showing details of a main structure of the optical disk device shown in FIG. 1;

FIG. 4 is a cross-sectional view of a main part showing a cross-section of a main part of the optical disk device shown in FIG. 3;

FIG. 5 is a top view showing in detail a structure of a turntable provided in the optical disk device shown in FIG. 1;

6 is a top view showing a side pressure mechanism in which the turntable shown in FIG. 5 is omitted.

FIG. 7 is a top view showing a side pressure mechanism before assembling the optical disc apparatus shown in FIG. 1;

FIG. 8 is a state diagram showing a state before adjusting an angle in a radial direction with respect to a main part of the optical disk device shown in FIG. 1;

9 is a state diagram showing a state after an angle adjustment in a radial direction with respect to a main part of the optical disk device shown in FIG. 8 is performed.

10 is a state diagram showing a state before adjusting an angle in a tangential direction with respect to a main part of the optical disk device shown in FIG. 1;

11 is a state diagram showing a state after an angle adjustment in a tangential direction with respect to a main part of the optical disk device shown in FIG. 10 is performed.

FIG. 12 is a main part structure diagram showing a main part structure of a conventional driving device.

[Explanation of symbols]

10 base, 10a, 10b fulcrum, 11
Screw, 12 adjusting screws, 100 floating deck, 200 turntable, 300 optical pickup, 301 main guide shaft, 302 spring member, 303 objective lens, 304 resin molding member, 400 spindle motor, 401 shaft portion, 500 adjusting plate, 501 Adjusting screw, 50
2 Projection, 503 Projection, 504 Supporting member,
600 ring, 601 V groove, 700 wire spring material, 710 leaf spring portion, 711 hole, 712
Hole, 713 screw, 714 hole, 715
Guide groove, 716 triangular corner, 720 coil winding part, 801 flat plate, 802 resin molded member,
803 leaf spring, 804 fulcrum, 805 fulcrum,
1000 Central axis in radial direction, 2000 Central axis in tangential direction

Continued on the front page (72) Inventor Kazuhisa Taniguchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Takaaki Eguchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. In-company (72) Inventor Hideaki Kikuchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation F-term (reference) 5D109 CA03 CA05 5D117 AA02 BB06 CC07 KK25

Claims (8)

[Claims] A driving unit having a shaft portion; a biasing device for applying a predetermined biasing force to the shaft portion in a direction substantially perpendicular to the shaft portion; a locking device for holding the driving device and locking a part of the biasing device. An adjusting plate having a stop formed thereon; a base for supporting the adjusting plate; an angle adjusting means provided on the adjusting plate for adjusting a mounting angle of the driving means; and the shaft portion substantially parallel to a surface of the adjusting plate. Provided in
A driving device provided with a sliding contact means having a sliding contact portion formed on the periphery with which another part of the urging means slides. 2. The sliding contact portion is formed in a groove shape, and one end and the other end of the biasing means are locked by a locking portion of an adjusting plate, and a part of the biasing means slides on the groove. The driving device according to claim 1, wherein the driving device is arranged as follows. 3. The base according to claim 1, wherein the base has a support portion for supporting two portions of the adjustment plate, and the adjustment plate is disposed closer to the base than the support portion. The driving device as described. 4. A hole is provided at a substantially central portion of the adjusting plate, and an adjusting screw is provided as an angle adjusting means which is fitted into the hole and a tip of the adjusting plate is brought into contact with the base. The adjusting screw is adjusted by adjusting the adjusting screw. 4. The driving device according to claim 1, wherein the angle of the plate is adjusted. 5. A turntable for mounting and rotating a disk, a pickup for reading recorded information on the disk, a transfer means for transferring the pickup along a radial direction of the disk, and a transfer of the transfer means. 3. A guide means for guiding the pickup, wherein the guide means is supported and fixed at a predetermined position near a fulcrum of the angle adjusting means to set the position and orientation of the pickup. 4. Drive. 6. The drive device according to claim 5, wherein the pickup is provided with a mechanism for independently adjusting an angle in a direction substantially perpendicular to a radial direction of the disk. 7. The urging means is formed of a wire spring material, the cross-sectional shape of the sliding contact portion is formed in a cylindrical surface, and the engaging height of the urging means at one end and the other end of the urging means is adjusted. The drive device according to claim 1, wherein the drive devices are different from each other. 8. The drive device according to claim 7, wherein a coil winding portion is formed in a part of the urging means.