JPH11203755A - Disk aligning and loading mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record/reproduce a highly densified disk at a high rotational speed by making thin a turntable integral disk loading mechanism having a disk aligning mechanism. SOLUTION: The part of a disk loading mechanism 3 composed of a pressing member 3 is notched so as to prevent overlapping with a disk loading mechanism 3 in thickness direction, and an aligning ring 4 having a contact surface with a disk left at a uniform pitch around the circumference of a top case 5 is added to a turntable 2. Thus, aligned disk loading is performed without increasing thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk alignment mounting mechanism for positioning and mounting a disk on a turntable of a disk recording or reproducing apparatus.

[0002]

2. Description of the Related Art When a disk recording or reproducing apparatus has a sufficient thickness, a method of mounting an alignment ring 4 on a turntable 2 is generally used. However, in a device in which the disk mounting mechanism is integrated with the turntable 2 due to the necessity of extremely thinning the device such as when the device is mounted on a notebook personal computer, for example, as shown in Japanese Patent Application Laid-Open No. 7-57358, The disk 10 was mounted on the turntable 2 with only the three pressing members 3 without using the alignment ring 4.

[0003]

When the disk 10 is mounted by three or more pressing members 3, the eccentric mounting of the disk 10 is prevented by balancing the pressing forces of the plurality of pressing members 3. Aligned. But,
It is difficult to make each pressing force and pressing direction uniform, and it is not possible to prevent eccentricity from occurring due to imbalance. This is an obstacle to higher density and higher speed rotation of the disk.

[0004]

In addition to a plurality of disk pressing mechanisms 3 and 8, a disk alignment ring 4 is also provided integrally with the turntable 2 so that alignment can be reliably performed. It is.

[0005]

FIG. 1 is a perspective view of a spindle motor 1 and a turntable 2 showing an embodiment of the present invention, and FIG. 2 is a plan view thereof. As shown in both figures, the upper part of the turntable is provided with three pressing members 3 for mounting a disc at a pitch of 120 degrees around the circumference. The centering rings 4 are arranged between the pressing members 3 around the circumference, and are also arranged at a pitch of 120 degrees. As shown in FIG. 2, the pressing members 3 are urged in the normal direction by the compression springs 8 and perform independent sliding operations, thereby acting to press the disk 10 onto the turntable 2. I do.

FIG. 3 is a plan view of the centering ring 4. Alignment ring 4 has disk mounting mechanisms 3, 8,
The portion that interferes with 9 has a cut-out central portion and is integrated. The hole at the center is for operation along the spindle shaft 6.

FIG. 4 shows a centering ring 4 when a disc is not mounted.
FIG. 3 shows a peripheral vertical sectional view (a DD sectional view in FIG. 2). The compression spring 7 urges the centering ring 4 upward along the spindle motor shaft 6, and the centering ring 4 slides up and down in the spindle axis direction. A part of the top case 5 serves as a slide stopper 5a for positioning upward. The contact surface 4a with the disk disposed outside the top case 5 has a tapered shape that is divergent, and enters the disk hole that is mounted from above, and
The hole diameter variation is absorbed, and centering is performed without play.

FIG. 5 is a longitudinal sectional view (a sectional view taken along the line CC in FIG. 2) of the vicinity of the pressing member when the disc is not mounted. Pressing member 3
The lower part is supported by the under case 9 so that it can slide in the normal direction, and the convex part (not shown) at the rear end of the pressing member 3 is engaged with the top case 5 and the under case 9. Thus, the amount of protrusion of the pressing member 3 from the top case 5 is defined. Alignment ring 4
Is different from the shape shown in FIG.
It has a shape that avoids the disk mounting mechanism of the under case 9. Therefore, in the portion where the disk mounting mechanism is provided, the alignment ring does not have the disk contact surface 4 a outside the top case 5.

Conventionally, in a thick disk recording or reproducing apparatus using the alignment ring 4, the alignment ring 4 has a contact surface with the disk 10 over the entire circumference of the top case 5. In the present invention, the centering ring 4 is 12
Although notched at a pitch of 0 degrees, there is no problem in aligning the disk 10 because the disk 10 contacts the disk 10 at equal intervals. Also, as shown in FIG.
The centering ring 4 does not rotate around the spindle motor shaft 6 because it is restricted by the end face of the long hole 5b provided in the shaft.

FIG. 6 is a perspective view showing the state of the pressing member 3 and the centering ring 4 when the disk 10 (not shown) is mounted. FIGS. 7 and 8 are longitudinal sectional views of the periphery of the pressing member 3 and the periphery of the alignment ring 4 at this time. The disc 10 is held down on the turntable 2 by the engagement of the pressing member 3 with the upper edge portion of the disc center hole, and the tapered contact surface 4 a of the alignment ring 4.
Is inserted into the disk hole according to the hole diameter of the disk 10 and is aligned. At this time, the pressing member 3 is slightly retracted in the center direction, and the centering ring 4 approaches the upper surface of the turntable 2 according to the hole diameter. Further, the spring force of the pressing member 3 is sufficiently larger than the spring force of the centering ring 4, and the disk 10 is pressed onto the turntable 2 without slipping during the rotation operation.

As described above, the area of the centering ring 4 that wraps with the disk mounting mechanisms 3, 8, and 9 in the height direction is cut, and the disk contact surface 4a is equally spaced around the top case 5 circumference. By arranging, the disk mounting mechanisms 3, 8, 9 and the disk centering mechanisms 4, 7 can be integrally installed on the turntable 2 without increasing the thickness of the turntable 2.

As in the present embodiment, the disk mounting mechanism may be of a type in which the pressing member rotates, a type in which the pressing member rotates, a configuration in which the pressing member and a spring are integrated, and the like. Similarly, any of the cases can be dealt with by cutting the alignment ring. Therefore, a thin disk recording or reproducing apparatus without eccentric mounting of the disk can be realized, and it is possible to cope with high density recording and high speed recording / reproducing of a future apparatus such as a DVD.

[0013]

According to the present invention, a turntable-integrated disk mounting mechanism having a disk centering mechanism can be realized with a thin structure, and a high-density disk can be rotated at a high speed. A thin disk recording / reproducing apparatus capable of recording or reproducing can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a spindle motor and a turntable when a disc is not mounted according to an embodiment of the present invention.

FIG. 2 is a plan view showing a spindle motor and a turntable when a disc is not mounted in FIG. 1;

FIG. 3 is a plan view of the alignment ring of FIG. 2;

FIG. 4 is a cross-sectional view around the alignment ring when a disc is not mounted.

FIG. 5 is a cross-sectional view around a pressing member when a disc is not mounted.

FIG. 6 is a perspective view showing a spindle motor and a turntable when a disc is mounted.

FIG. 7 is a cross-sectional view around the alignment ring when a disc is mounted.

FIG. 8 is a cross-sectional view around a pressing member when a disc is mounted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Spindle motor, 2 ... Turn table, 3 ... Pressing member, 4 ... Alignment ring, 5 ... Top case, 6 ... Spindle motor shaft, 7 ... Compression spring, 8 ... Compression spring, 9 ... Under case, 10 ... disk.

Claims (1)

[Claims] 1. A disk mounting mechanism in which three or more pressing members for pressing and holding a disk on a turntable are integrally provided on the turntable, and a lap portion of the disk mounting mechanism which does not increase the thickness is cut out. A disk alignment mounting mechanism comprising: a centering ring.