JP2000030329A - Disk drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the centering performance with a simple structure by making the side surface of a disk guide include a taper part abutted on the lower surface inner edge of a lower layer disk at one point and a vertical part vertically prolonging from the taper part, and pressing upward a disk provided between a turntable and the disk guide. SOLUTION: A motor shaft 22 is inserted slidably into a bearing part 36 and a spring abutment part 38 in which the upper end of a coil spring 20 is abutted on its lower face is formed on the upper part of the bearing part 36, and a centering part 40 is formed on the peripheral part of the spring abutment part 38. The centering part 40 contains a taper-shaped guide part 42 connected with the central hole of the disk 18 to perform the centering of the disk 18, and the columnar vertical part 44 and the taper part 46 size expanding toward a lower side at a prescribed angle are formed below the guide part 42. By that an inner peripheral surface of a one side upper layer disk 18a is abutted on the vertical part 16, the center of the lower layer disk 18a is shifted, and the off center of the upper layer disk 18b is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive, and more particularly to a disk drive for rotating a disk having an upper disk and a lower disk bonded together.

[0002]

2. Description of the Related Art In a conventional disk drive of this kind,
When rotating the disk on which the upper disk and the lower disk are bonded to each other, the misalignment of the upper disk and the lower disk causes a misalignment with respect to the track of the upper disk by the bonding error,
There was a problem.

On the other hand, a prior art in which a plurality of guide portions are brought into contact with an edge of a center hole of a disk to perform a centering operation of the disk was published on February 27, 1996. JP-A-8-55398 [G1
1B 17/028].

[0004]

However, in the prior art, since the guide portion is divided, the shape becomes complicated, and there is a problem that the accuracy of parts is reduced. Also,
There is also a problem that the centering performance is reduced with a decrease in component accuracy. Therefore, the main purpose of this invention is to
An object of the present invention is to provide a disk drive device having a simple structure and improved centering performance.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a disk drive for mounting a disk in which an upper disk and a lower disk are bonded to each other, comprising: a disk motor having a motor shaft; a disk mounting surface; A turntable whose center is fixed to the motor shaft, and a disc guide having a center hole disposed above the turntable and through which the motor shaft is slidably inserted, the side surface of the disc guide is provided with a side surface of the lower disc. A spring that includes a tapered portion where the lower surface inner edge abuts at at least one point, and a vertical portion that extends vertically from the tapered portion, and further presses the disc guide upward between the turntable and the disc guide;
And a locking portion for locking the disk guide.

[0006]

The taper provided on the disc guide is
The disc is in contact with the inner edge of the lower surface of the lower layer disc to perform the centering operation. Also, the center of the lower disk is moved by the vertical portion provided on the disk guide hitting the inner peripheral surface of the upper disk.

[0007]

According to the present invention, by performing the centering operation by the tapered portion of the disk guide, it is possible to prevent rattling in the lateral direction of the disk. In addition, even if there is a bonding error between the upper layer disc and the lower layer disk, the vertical portion of the disk guide hits the inner peripheral surface of the upper layer disk to move the center of the lower layer disk and reduce the misalignment of the upper layer disk. it can.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

1 shows a disk drive 1 according to this embodiment shown in FIG.
Numeral 0 includes the disk motor 12, the turntable 14, and the disk guide 16, and rotates the disk 18 on which the lower disk 18a and the upper disk 18b are bonded. A coil spring 20 is provided between the turntable 14 and the disc guide 16 to resiliently urge the disc guide 16 upward.

The disk motor 12 has a motor shaft 22, and the turntable 14 includes a cylindrical bearing 26 through which the motor shaft 22 is inserted, and is fixed to the motor shaft 22 at the bearing 26. That is, the turntable 14 is rotated integrally with the motor shaft 22 by the disk motor 12. A spring receiving portion 28 for receiving the lower surface of the coil spring 20 is formed on an upper portion of the bearing portion 26.
8 has a disk receiving portion 30 for receiving the disk 18.
Are further formed, and the disc receiving portion 30
And a disk mounting surface 32 on which is mounted.

The disk guide 16 has a cylindrical bearing 3.
6, the motor shaft 22 is slidably inserted into the bearing portion 36. A spring contact portion 38 is formed at an upper portion of the bearing portion 36 with which the upper end of the coil spring 20 contacts the lower surface, and a centering portion 40 is further formed at a peripheral portion of the spring contact portion 38. FIG. 2 is an enlarged view of the disk 18 and the centering portion 40. Referring to FIG. 2, the centering portion 40 is for centering the disk 18 by engaging with the center hole of the disk 18 and functions to smoothly engage the disk 18 with the disk guide 16. A tapered guide portion 42 is included, and a cylindrical vertical portion 44 and a tapered portion 46 whose diameter increases downward at a predetermined angle are formed below the guide portion 42. The starting point A of the tapered portion 46 is located above the upper surface of the disk mounting surface 32 and below the lower surface of the upper disk 18b of the disk 18 mounted on the disk mounting surface 32. That is, the position of the starting point A is located within the thickness of the lower disk 18a.

A stopper receiving portion 48 for receiving the stopper 24 is formed on the upper surface of the spring contact portion 38. The stopper 24 prevents the disk guide 16 urged by the coil spring 20 from coming off the motor shaft 22. In the disk drive device 10 of this embodiment, when the disk 18 is mounted on the disk drive device 10, the center hole of the disk 18 is pushed in along the guide portion 42 of the disk guide 16, and the disk mounting surface 3
2 The disk 18 on the disk mounting surface 32
When the turntable 14 on which is mounted is rotated by the disk motor 12, the centering portion 40 of the disk guide 16 is pressed against the disk 18 by the coil spring 20.

At this time, the tapered portion 46 of the centering portion 40 comes into contact with the inner edge of the lower surface of the lower disk 18a of the disk 18, thereby pressing the center hole of the disk 18. By fixing the center hole of the disk 18 on the tapered portion 46 in this manner, the disk 18
It is possible to prevent rattling on the above. FIG. 3 is an enlarged view of a portion of the disk 18 and the disk guide 16. Referring to FIG. 3, if there is a bonding error between the lower layer portion 18a and the upper layer portion 18b of the disc,
On one side of 8, the inner peripheral surface of the upper disk 18b abuts on the vertical portion 44, and the inner edge of the lower surface of the lower disk 18a does not abut on the tapered portion 46. At this time, on the other side of the disk 18, the inner edge of the lower surface of the lower disk 18a and the tapered portion 4
6 is in contact with the inner peripheral surface of the upper disk 18b and the vertical portion 44.
Does not abut. Thus, one upper layer disk 18b
When the inner peripheral surface of the upper disk 18a hits the vertical portion 16, the center of the lower disk 18a is shifted, and the misalignment of the upper disk 18b can be reduced. Therefore, even if there is a bonding error between the lower disk 18b and the upper disk 18a, it can be mitigated.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is an enlarged view showing a disk and a centering portion of the embodiment of FIG. 1;

FIG. 3 is an enlarged view showing the disk and the disk guide of the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Disk drive device 12 ... Disk motor 14 ... Turn table 16 ... Disk guide 18 ... Disk 20 ... Coil spring 40 ... Centering part 44 ... Vertical part 46 ... Taper part

Claims (2)

[Claims] 1. A disk drive for mounting a disk in which an upper disk and a lower disk are bonded to each other, comprising: a disk motor having a motor shaft, a disk mounting surface, and a center fixed to the motor shaft. A turntable, and a disk guide disposed above the turntable and having a center hole through which the motor shaft is slidably inserted. The side surface of the disk guide has an inner edge on the lower surface of the lower disk. A spring that includes a tapered portion that abuts at least one point and a vertical portion that extends perpendicularly from the tapered portion, and that is provided between the turntable and the disk guide and that presses the disk guide upward, and the disk A disk drive device comprising a locking portion for locking a guide. 2. The disk drive device according to claim 1, wherein a folded portion between the tapered portion and the vertical portion is located within a thickness of a lower disk.