JPS61150162A - Support mechanism of optical disc driver - Google Patents

Abstract

PURPOSE:To reduce the cost of an optical disc device by providing a mechanism for correcting a distance of an optical pickup to an optical disc face and the relation of vertical position of an optical axis to a support mechanism. CONSTITUTION:A motor 1 of a turntable is fixed to a tilt adjusting plate 2 and the plate 2 is fitted to a base 3 by adjusting mechanisms 4 placed at three positions. The gap (g) between an optical disc and an objective lens of the optical pickup 10 and the verticality of the optical pickup 10 are adjusted in the following. A nut 50 is loosened, an adjusting slot 44 is tightened by a screw driver to adjust the screwed amount of the base 3 of a screw shaft 40 for three positions. Since the screw shaft 40 is energized in the direction of the plate 2 by a plate spring 60, the screw shaft 40 is fixed by the adjusting position, the play between the screw 43 of the shaft 40 and a screw hole 3a of base 3 is corrected and the adjusting position is kept accurate. Thus, the adjustment is finished.

Description

[Detailed description of the invention] [Technical field] The present invention relates to a support mechanism for an optical disc drive.

[Prior Art] In recent years, there has been a proposal to use an optical disk device that uses a disc-shaped optical disk made of a photoreactive recording material as a storage medium as an auxiliary storage device of a computer system.

This optical disc has one spiral recording track formed on its surface at a track pitch of approximately 1.5 μ-.
A bit with a diameter of about 0.5 μι according to the information to be stored is directly written on this track by a laser spot narrowed down to a minute diameter of about 1 μι. Also, for example, about 30cm in diameter
Optical discs cost 1011-101! It is possible to store data on the order of bits.

In this way, optical disk devices have a large storage capacity,
Furthermore, since data is written directly onto the optical disk, it is advantageous in terms of storage of stored data compared to storage devices using magnetic storage media.

By the way, since optical disks store information at a very high density, tracking control that causes the optical pickup that records and reads information to follow the recording track of the optical disk, and focusing control that focuses the optical pickup on the recording track must be performed precisely. 6 Also, for this purpose, it is necessary to precisely position the positional relationship between the recording surface of the optical disc and the objective lens of the optical pickup, and for this purpose, the following measures have been taken in the past. .

That is, the mounting mechanism for the turntable that rotates the optical disk and the mounting mechanism for the optical pickup are assembled using highly accurate parts. or.

After assembly, we actually measure the front and back postures of the turntable and optical pickup, and the distance between the objective lens of the optical pickup and the optical disk mounting surface of the turntable. Based on the results, we can, for example, insert a spacer into the bottom surface of the support board of the turntable. A trial-and-error method was used in which a selection was made and the process was repeated until a predetermined result was obtained.

However, this conventional method has the problem that the processing cost for one part increases and the adjustment time increases, resulting in high costs.

[Objective] The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a support mechanism for an optical disc drive device that can reduce the cost of the optical disc drive.

[Configuration] In order to achieve this object, the present invention is equipped with a mechanism for correcting the spacing distance of the optical pickup with respect to the optical disk surface and the vertical positional relationship with the optical axis of the optical pickup in the support mechanism, and and the spacing can be easily adjusted.

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

1 and 2 show an optical disk drive mechanism according to an embodiment of the present invention.

In the figure, the motor l of the turntable is the tilt adjustment plate 2.
This tilt adjustment plate 2 is fixed to .

It is attached to the base 3 by adjustment mechanisms 4 provided at three locations.

Spindle 5 attached to rotor shaft 1a of motor l
is provided with a disk mounting section 6 for fixing the optical disk while holding it in a plane perpendicular to the rotor shaft 1a.

The optical pickup 10 that records and reads information on the recording track of the optical disc is driven in the radial direction of the optical disc by a tracking mechanism (Q in the figure), and a focusing mechanism (not shown in the figure) that drives the objective lens 11 in the optical axis direction. road).

In this case, it is necessary to initially set the gap g between the recording surface of the optical disc LD and the objective lens 11 of the optical pickup 10 and the perpendicularity of the optical axis of the optical pickup 10 to the recording surface of the optical disc within predetermined ranges.

Further, the motor 1 includes a rotor shaft 1a, a rotor tb, an inner yoke 1c, and an outer yoke 1d.
is rotatably attached to the inner yoke 1c by bearings le and if, and constitutes a drag cup type induction motor as a whole.

Now, FIG. 3 shows an example of the adjuster $4.

In the figure, the adjuster 4 * 4 has an upward spherical part 41 formed in its center, threaded parts 42 and 43 at the upper and lower parts of this spherical part 41, and a slotted part etc. on the upper surface. Adjustment grooves 44 were formed. Screw shaft 40. A nut 50 that is screwed into the threaded portion 42. and a leaf spring 60 that is interposed between the lower surface of the spherical portion 41 of the screw shaft 40 and the base 3 and biases the screw shaft 40 in the direction of the tilt adjustment plate 2.

Further, a through hole 2a for inserting the J-threaded shaft 40 is bored in the inclination adjustment plate 2, and an opening 2aa of the through hole 2a to the inclination adjustment plate 2 is formed in a conical shape. ing. .

Moreover, in the base 3 corresponding to this through hole 2a.

A screw hole 3a into which the threaded portion 43 of the screw shaft 40 is screwed is bored.

The work of attaching the tilt adjustment plate 2 and the base 3 using the adjustment mechanism 4 is as follows.

That is, first, the threaded portion 43 of the threaded shaft 40 is attached to the plate spring 60.
The screw portions 43 of the screw shafts 40 are inserted into the three screw holes 3a of the base 3, and the tilt adjustment plate 2 is positioned so that each screw shaft 40 is inserted into the through hole 2a. , lower it in the direction of base 3.

As a result, the opening 2aa of the through hole 2a engages with the spherical portion 41 of the screw shaft 40, and the inclination adjustment plate 2 is attached to the base 3. Furthermore, the nut 50 is attached to the threaded portion 4 of the threaded shaft 40.
2, the tilt adjusting plate 2 is fixed to the base 3.

Moreover, the attachment adjustment of the inclination adjustment plate 2 and the base 3 can be performed as follows.

That is, first, loosen the nut 50, and then loosen the adjustment groove 4.
4 with a screwdriver or the like to adjust the amount of screw engagement of the screw shaft 40 with the base 3.

If this is done for all adjustment mechanisms 4, the base 3
The distance, amount of inclination, and direction of inclination of the inclination adjusting plate 2 relative to the inclination adjustment plate 2 can be arbitrarily set.

On the other hand, since the screw shaft 40 is urged in the direction of the tilt adjustment plate 2 by the leaf spring 60, the screw shaft 40 is fixed at the adjusted position. Moreover, the biasing force of the leaf spring 60 corrects play between the threaded portion 43 of the screw shaft 40 and the threaded hole 3a of the base 3, and the adjusted position is accurately maintained.

In this way, the distance between the base 3 and the tilt adjustment plate 2, the amount of inclination and the direction of inclination of the tilt adjustment plate 2 with respect to the base 3 are set.

By the way, in the above-described embodiment, if the adjustment mechanisms 4 are located at each vertex of the triangle with the rotor shaft 1a of the motor 1 at its center, the amount of adjustment by each adjustment mechanism 4 will be the same. becomes easier. Note that the number of adjustment mechanisms 4 provided is not limited to three, and the number of leaf springs 60
A coil spring or the like can be used instead.

[Effects] As described above, according to the present invention, the support mechanism is provided with a mechanism for correcting the distance between the optical pickup and the optical disk surface and the vertical positional relationship with the optical axis of the optical pickup. Since the distance between the optical disc and the optical fiber can be easily adjusted, there is an advantage that the cost of the optical disc and screen device can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an optical disk drive device according to an embodiment of the present invention, FIG. 2 is a sectional view showing a turntable according to an embodiment of the present invention, and FIG. 3 is an example of an adjustment mechanism. FIG. 1...Motor, 1a...Rotor shaft, lb...Rotor, 1c...Inner yoke, 1d...Outer yoke, 1
e, lf...bearing, 2...tilt adjustment plate, 2a
...Through hole, 2aa...Opening, 3...Base,
3a...screw hole, 4...adjustment mechanism. 5... Spindle, 6... Disk mounting section, 10.
...Optical pickup, 11...Objective lens, 40...
・Screw shaft, 41... Spherical part, 42.43... Threaded part, 44... Adjustment groove, 50... Nut, 60...
leaf spring. Agent Patent Attorney Crest 1) Makoto Figure 7 Figure 2

Claims (1)

[Claims] In the support mechanism of an optical disk drive device consisting of a turntable that rotationally drives an optical disk and an optical pickup that records and writes data on the optical disk, through holes are formed in at least three places in the turntable or the optical pickup mounting board, and A support board in which the lower surface of the mounting board with holes is formed into a conical shape and screw holes corresponding to the through holes are formed is placed below the mounting board, and the spherical part that engages with the through holes is located in the center. , the mounting board is supported on the support board via a threaded shaft that has a threaded part screwed into the threaded hole formed at the bottom and a rotation adjustment part formed at the top, and the threaded shaft is attached in the direction of the mounting board. A support for an optical disk drive device, characterized in that a biasing member for biasing the screw shaft is disposed between the support substrate and the spherical portion of the screw shaft, and an upper part of the screw shaft is fixed to the support substrate via a pressing member. mechanism.