JPS62283469A - Support structure for disk driver - Google Patents

Abstract

PURPOSE:To improve the recording and reproducing characteristic by providing a motor base onto a support base, adjusting the motor base horizontally and driving the support base to the right/left so as to make a head moving locus coincident with the disk center. CONSTITUTION:A support base 11 is fitted onto a chassis base 10 via fixed bolts 12, 13, 14, and the motor base 15 is fitted onto it by adjusting bolts 16, 17, 18 and the support base 11 is provided with an adjusting means 27. Through the constitution above, three adjusting bolts 16-18 are adjusted to adjust a disk mounting face 21 horizontally. Then the fixed bolts 13, 14 are loosened, the adjusting means 27 is operated to move the support base 11 around the bolt 12 to the right/left, then the disk center and the head moving locus are made coincident to eliminate the position deviation of the both thereby improving the recording/reproducing characteristic.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a disc that is applied to a disc player device that uses a disc as a recording medium to record or reproduce information such as audio and images. The present invention relates to a support structure for a drive device.

Note that the disk player device referred to here refers to an optical disk player equipped with an optical head that uses a CD (funbakuto disk), LD (laser disk), magneto-optical disk, etc. as a recording medium, a VHD (video high-density disk), etc. ) etc. as a recording medium, such as a magnetic recording/reproducing device equipped with a magnetic head that uses a disc-shaped disk as a recording medium (prior art). It was supported on the chassis base with a support structure as shown in Figure 3.

On the chassis base 1 are adjustment poles) 2a, 2b12c.
The support stand 3 is supported at three points parallel to the base l via the support stand 3. A drive motor 4 is attached to the support base 3 with its drive shaft 5 protruding perpendicularly to the 17 bases. At the end of the drive shaft 5 protruding from the support base 3 of the drive motor 4,
A turntable 6 is attached.

In this way, the support structure of the conventional disk drive device is supported at three points on the chassis base 1 via the adjustment bolts 2a, 2b, and 2c, and the support base 3 is supported by each adjustment bolt 2 as 2 bz. The height is adjusted by screwing 2c, and at the same time each adjusting bolt 2a, 2
By slight movement of b12c, the parallelism of the disk mounting surface of the turntable 8 to the chassis base 1 was adjusted, that is, the attitude of the shear 7 parallel to the base 1 was adjusted.

(Problems to be Solved by the Invention) However, in the support structure of the conventional disk drive device, the turntable 8 is adjusted by the screw rotation of the three adjustment ports (2a, 12b, s2c) to the one surface of the base of the turntable.
Since the configuration was only for adjusting the parallelism of the disc mounting surface of the turntable, that is, adjusting the parallel attitude, the /
When adjusting the parallelism with respect to the motor, errors in machining accuracy and assembly of the support stand etc. will cause the extension line of the movement trajectory of the head center to not match the center of the disk diameter, that is, the rotation center of the turntable 8, according to the error table above. A problem was arising.

In particular, in optical disc player devices, if the movement locus of the head center (laser beam irradiation optical axis) does not coincide with the disc center line, there will be an adverse effect on the tracking, focus error signal detection, and playback signal detection systems.

Therefore, in disc player apparatuses, it is a serious problem to make the movement locus of the head center coincide with the disc diameter center. However, according to the support structure of the conventional disk drive device as described above, the adjustment operation of the support posture requires three steps.
Adjustment is troublesome because each of the point-supported adjustment bolts 2a to 2c is rotated separately, and when adjusting the attitude of the turntable surface parallel to the base surface, machining accuracy may be affected. Due to the above error, etc., the head center movement trajectory will be at the center of the disk diameter (center of the turntable).
The phenomenon of misalignment and mismatch inevitably occurs.

The present invention has been made in view of the above points, and an object of the present invention is to provide a support structure that can easily adjust the support posture of a disk drive device simply, reliably, with high precision, and easily.

(Means for Solving the Problems) The present invention relates to a support structure for supporting a disk drive device on a base, and is capable of adjusting the parallelism of the disk mounting surface of the disk drive device with respect to the base surface of the disk drive device. The first support means supported, and the second support t, which is rotatably supported parallel to the base surface via the first support means with the disk rotation center of the disk drive device as the center of another point. The present invention employs a configuration in which the disk drive device is supported on the chassis base via the first and second support means so that its posture can be adjusted.

(Function) According to the present invention, after adjusting the parallelism of the disk mounting surface of the disk drive device with respect to the chassis base via the first support means, the disk rotation center is adjusted to the head via the second support means. The structure adjusts the supporting posture of the disk drive by moving the disk so that it matches the trajectory of the center movement, so that the disk rotation center and the head are aligned with the parallelism of the mounting surface of the disk loaded in the disk drive with respect to the yarn base. Posture adjustment to match the movement trajectory of the center can be easily performed. Therefore, the discrepancy between the disk rotation center and the movement locus of the hennode center that occurs when adjusting the V-row displacement of the disk mounting surface of the disk drive device with respect to the shear 7 base surface is eliminated.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a support structure for a disk drive device according to the present invention, and FIG. 2 is a plan view thereof.

In the embodiment, an example in which the present invention is applied to an optical disk player device equipped with an optical head will be described, but the present invention can also be applied to a magnetic recording/reproducing device having a similar configuration and equipped with a magnetic head. In FIGS. 1 and 2, a support base 11 is attached to the base 10 via fixing bolts 12, 13, and 14. The motor base 15 is mounted on the support base 11 with the adjustment bolt 1
6.17.18. A disk drive motor 19 is attached to the motor base 15 from the bottom side. A drive shaft 20 of the motor 19 is perpendicular to and protrudes above the motor base 15. Drive shaft 20
A turntable 21 is supported. The disc D is loaded and unloaded from the turntable 21. Then, above the turntable 21, a turntable 2
A disk clamper (not shown) is provided that moves up and down in response to loading and unloading. turntable 21
1-, when the disk D is loaded, the disk clamper moves downward to align the center of the disk D with the center of the turntable 21 and hold the disk D on the turntable 21.

The motor base 15 is supported at three points on the support base 11 via adjustment bolts 16, 17, and 18. Adjustment poles 16, 17, and 18 each have one end vertically protruding above the support base 11, and are fitted with a washer 22, a wave washer 23, and a nut 24.
It is rotatably attached via the Adjustment bolt 1
Eleven threaded holes 25 are formed in 6.17.18 in the axial direction. This screw hole 25 has a lock bolt 2.
6 is screwed in. On the other hand, the motor base 15 has
Threaded holes 151.corresponding to adjustment bolts 16.17.18.
151.151 is formed. Adjustment bolt 16.1
7.18 are screwed into these screw holes 151, . In this way, the motor base 15 is supported at three points on the support base 11 via adjustment poles 16, 17, and 18.

On the other hand, the support base 11 has fixing bolts 12.13.14
It is mounted on the chassis base 10 via.

The support 18 base 11 has screw holes 111 and 111 in three places.
．． 111 is formed.

On the other hand, on the chassis base 10 there are screw holes 111,...
・Bolt holes 101, 102, and 103 are formed correspondingly. This one bolt hole 101 is formed in a circular shape, and the other two bolt holes 102 and 103 are formed in the bolt hole 101.
It is formed into a long oval shape along an arc-shaped locus centered on . The support base 11 is mounted on the shear base 10 via fixing bolts 12, 13, 14 so as to be horizontally rotatable about one point within the range of the oblong bolt holes 102, 103. An adjusting means 27 for rotating the support base 11 is provided on a side portion that is approximately 180 degrees opposite to a point serving as a rotation fulcrum of the support base 11 . The adjustment means 27 includes a support 271 having a menage part erected outward at the (1111) part of the support base 11, a support 272 erected on the Nya 7 base 10 approximately parallel to this support 271, and this support 271. A fill spring 273 is provided between the supports 271 and 272 to bias the supports 271 and 272 in the opening direction, and a coil spring 273 is inserted through the hole formed in one of the supports 272 to open the other support 2.
It is formed by an adjustment knob 274 screwed into the menu knob of 71.

As mentioned above, on one side of the 7-palm base 10 of the disk drive device supported on the 7-palm base 10, there is an optical nozzle 30 capable of linearly feeding the disk D loaded on the turntable 21 in the radial direction. It is attached to the linear feed mechanism 31 as shown in FIG. The optical head 30 is provided so that the locus M of the optical head center O (objective lens center), which irradiates the disk D with laser light in a vertical manner, coincides with the radial direction of the disk D.

Next, a description will be given of an operation for adjusting the support posture of the disk drive device configured as described above using the support FW structure.

First, the turntable 2 is placed on the 10 sides of the chassis base.
One adjustment of the parallelism of the disk mounting surface 211 of No. 1 is performed using adjustment bolts 18, 17, and 18 that support the motor base 15 at three points.
This is done by rotating the screws individually or sequentially. For example, when the adjustment bolt 16 is turned clockwise, the adjustment bolt 16 is screwed into the screw hole 151 of the motor base 15, and the right end of the motor base 15 shown in FIG. 1 is lowered. Conversely, when the adjustment pole/16 is turned to the left, the left end of the motor base 15 is raised. In this way, when the adjusting bolts 18, 17, and 18 are sequentially turned by minute amounts, the parallelism of the disk mounting surface 211 is adjusted at the predetermined 14 alignment points.

In this way, the disc mounting 211 of the turntable 21
After adjusting the parallelism, optical alignment is performed to compensate for the misalignment between the extension line of the movement trajectory M of the head center O of the head 30 and the rotation center of the turntable 21, that is, the center of the drive shaft 20 of the drive motor 19. . This positional alignment is performed by screwing the adjustment screw 274 of the adjustment means 27 by a predetermined amount in a predetermined direction. When the adjustment screw 274 is turned to the right, the adjustment screw 274 is screwed into the female thread part of the support 271, and the support base 11 is moved counterclockwise around the fixing bolt 12, so that the center of the turntable is aligned with the center of the fixing bolt 12. It is moved downward in Figure 2 to the center. Conversely, adjust screw 274
When turned to the left, the adjustment lever 274 is loosened, and at the same time the support 271.272 is loosened by the biasing force of the coil spring 273.
The space is expanded. As a result, the support base 11 is moved clockwise around the fixing bolt 12, and the center of the turntable is moved upward in FIG.

In this way, by turning the adjusting screw 274 minutely in the forward and reverse directions, the head center O
The shift between the movement locus M and the center of rotation of the turntable 21 is adjusted so that their centers coincide.

After adjusting the parallelism of the turntable 21 and aligning the center of rotation of the turntable 21 as described above, the lock bolts 2 of the adjustment bolts 16, 17, and 18 are adjusted.
6 and then tighten the bolts 12, 13, and 14, the adjustment bolts 16, 17, and 18 will be fixed.
Then, the support base 11 is fixed to the yarn 7 base 10.

In this way, the disk drive device is adjusted to the correct support posture via the support base and motor base 15, and is supported on the shear 7 base 10.

According to the above support structure, the turntable 21 has l l
The parallelism of the disk D to the chassis base 10 is accurately determined, and the movement trajectory M of the head center is
As explained above, according to the present invention, an optimal loading state of the disc D onto the turntable 21 in which the radius of the disc D and the radius of the disc D correctly match is obtained, and this state is maintained (effects of the invention). While maintaining the parallelism of the mounting surface to the chassis base, the movement trajectory of the head center can be easily and accurately matched with the disk diameter center, so head servo control caused by positional deviation of the disk diameter center with respect to the head movement trajectory can be avoided. There is no adverse effect on the system, signal detection system, etc., and the recording and reproducing characteristics of the disc player device are maintained and improved.

[Brief explanation of the drawing]

FIG. 1 is a partial side sectional view showing one embodiment of the support structure for a disk drive device according to the present invention, and FIG.
FIG. 3 is a side view showing a conventional example. 10... Yarn base 11... Support base 12.13.14... Fixing bolt 15... Motor base 16.17.18... Adjustment bolt 19... Disk drive motor 21...・Turntable 27...A adjusting means M...Head center movement locus D...Disk retainer Applicant: NEC Home Electronics Co., Ltd.

Claims (1)

[Claims] (1) In a support structure that supports, on a chassis base, a disk drive device of a disk player device that records or reproduces information such as audio and images using a disk as a medium, the disk of the disk drive device is attached to the chassis base surface. a first support means that supports a mounting surface in a parallelism-adjustable manner; and a disk rotation center of the disk drive device can be rotated parallel to the chassis base surface about another point via the first support means. and a second support means supported by the disk drive device, and the disk drive device is supported on the chassis base so as to be adjustable in attitude via the first and second support means. structure.