JP2002334496A - Chucking mechanism for disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chucking mechanism for a disk device which has excellent assemblability and can fix a disk to a rotating body with a simple structure. SOLUTION: The chucking mechanism has a rotating body 4 on which a disk 1 is placed and a rotary shaft 5. An elastic body 3 of a dish-shaped body is positioned in the inside of a center hole 1a of the disk 1. A slit is notched at an outer end part of the elastic body 3 and an elastic tongue 3a is formed, and a ball 2 is fixed to its outer surface. When the body 4 is not rotated, since there is a gap H between the ball 2 and the center hole 1a, the disk 1 can be easily loaded on the rotating body 4, but when the rotating body 4 rotates, the ball 2 moves toward the outside with centrifugal force and is pressed to an inner end surface of the center hole 1a, and the disk 1 is firmly fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive chuck mechanism for fixing a disk to a rotating body.

[0002]

2. Description of the Related Art In recent years, disk devices have been used for audio-visual equipment,
The demand has been greatly extended in the field of information communication equipment and the like, and a simpler mechanism is required for a chuck mechanism which is one element of a disk device.

Hereinafter, a chuck mechanism of a conventional disk drive will be described. FIG. 7 is a sectional view of a chuck mechanism of a conventional disk drive. 1 is a disk, 2 is a ball for pressing the disk 1, 4 is a rotating body on which the disk 1 is mounted, 5 is a rotating shaft, 6 is a center hub integrated with the rotating body 4, and 7 is a coil spring that resilients the ball 2. is there. Three balls 2 are arranged at equal intervals.

[0004] The operation of the chuck mechanism of the conventional disk device configured as described above will be described below. 3 movable balls 2 arranged at equal intervals
Is pressed by a force in the direction A by three coil springs 7 having fixed ends on the center hub 6 and arranged at equal intervals. The force in the direction A is the resultant of the force in the direction a1 and the force in the direction a2, and the force in the direction a2 is the resultant of the force in the direction b1 and the force in the direction b2. Accordingly, the ball 2 presses the disk 1 against the rotating body 4 with a force in the direction b2 to fix the disk.

[0005]

However, in the above-described conventional configuration, when the coil spring 7 is mounted in the rotating body 4 so as to press the three balls 2, the coil spring 7 must be assembled while being compressed. However, there is a problem that the assemblability is poor.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a disk drive chuck mechanism which can improve the assemblability by eliminating the conventional spring.

[0007]

For this purpose, the present invention provides a rotating shaft, a rotating body which rotates about the rotating shaft, and an elastic member located inside a center hole of a disk mounted on the rotating body. The chuck mechanism of the disk drive is constituted by a body and a ball mounted on the outer end of the elastic body and elastically contacting the inner end of the center hole by centrifugal force during rotation. Preferably, the elastic body is a dish-shaped body, and an outer end of the dish-shaped body is partially cut out to form an elastic tongue, and the ball is attached to the outer end of the elastic tongue. did.

There are a rotating shaft, a rotating body that rotates about the rotating shaft, and an elastic body located inside a center hole of a disk placed on the rotating body, and the elastic body is a dish-shaped body. Then, the outer end of the dish-shaped body was partially cut out to form an elastic tongue, and the elastic tongue was elastically contacted with the inner end face of the center hole to fix the disk. Desirably, the elastic tongue is bent in a ring shape.

According to the above configuration, the structure and assemblability of the chuck mechanism can be simplified. Also, the disk or the elastic tongue can be pressed against the inner end surface of the center hole of the disk by the centrifugal force at the time of rotation of the rotating body, and the disk can be firmly fixed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a chuck mechanism of a disk device according to a first embodiment of the present invention,
FIG. 2 is a sectional view of the same, and FIGS. 3A and 3B are sectional views of the same operation. 1 and 2, 1 is a disk, 2
Is a ball resilient in the center hole 1a of the disk 1, 3 is an elastic body located inside the center hole 1a, 4 is a rotating body on which the disk 1 is mounted, 5 is a rotating shaft for rotating the rotating body 4, 6
Is a center hub.

As shown in FIG. 1, three balls 2 are arranged around an elastic body 3 at equal intervals. The elastic body 3 is a dish-shaped body, and a slit 3b is cut out at an outer end thereof to form an elastic tongue 3a. The ball 2 is integrally fixed to the outer surface of the elastic tongue 3a. I have. In addition, ball 2
So that the ball 2 can be firmly fixed to the elastic tongue 3a.
The portion fixed to the elastic tongue piece 3a is chamfered flat. The elastic body 3 is inserted into the rotating shaft 5, and the upper surface at the center is attached to the lower surface of the bearing 6 a of the center hub 6.

FIG. 3A shows a state in which a disk is mounted (the rotating body 4).
At the time of non-rotation). In this state, there is a gap H between the ball 2 and the inner end surface of the center hole 1a of the disk 1, and therefore, the disk 1 can be easily mounted on the rotating body 4.

When the rotating body 4 rotates, FIG. 3 (b)
As shown in (1), the ball 2 and the elastic tongue 3a move outward due to the centrifugal force at the time of rotation, and the ball 2 is elastically contacted with the inner end face of the center hole 1a to firmly fix the disk 1. When the rotation of the rotator 4 is stopped, the ball 2 and the elastic tongue 3a move as shown in FIG.
Returning to the state shown in (a), the gap H occurs, and the disk 1 can be easily removed from the rotating body 4.

FIG. 4 is a plan view of a chuck mechanism of the disk drive according to the second embodiment of the present invention, FIG.
(A), (b) is sectional drawing in the same operation | movement. Elastic body 13
Is a dish-shaped body, and an elastic tongue 13a is formed by cutting a slit 13b at an outer end thereof. Elastic tongue 13a
Is formed into an annular bent portion 13c. By forming the annular bent portion 13c, the ball 2 becomes unnecessary. Other configurations are the same as those of the first embodiment.

At the time of mounting the disc shown in FIG.
There is a gap H similar to that of the first embodiment, and the disc 1
Can be easily mounted on the rotating body 4. When the rotating body 4 rotates, the elastic tongue 13a expands outward as shown in FIG. 6B, and the bent portion 13c is pressed against the inner end face of the center hole 1a to firmly fix the disk 1. When the rotation stops, the state returns to the state shown in FIG. 6A, and the disk 1 can be easily taken out. According to the second embodiment, the ball 2
Can be eliminated, so that the structure can be simplified and the cost can be reduced.

[0016]

As described above, according to the present invention, the structure of the chuck mechanism can be simplified, the assemblability can be improved, and the disk can be firmly fixed on the rotating body.
Further, the elimination of the ball makes it possible to further simplify and reduce the cost.

[Brief description of the drawings]

FIG. 1 is a plan view of a chuck mechanism of a disk device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a chuck mechanism of the disk device according to the first embodiment of the present invention;

FIG. 3A is a sectional view of the disk device according to the first embodiment of the present invention during operation of the chuck mechanism. FIG. 3B is a sectional view of the disk device of the first embodiment of the present invention during operation of the chuck device.

FIG. 4 is a plan view of a chuck mechanism of the disk device according to the second embodiment of the present invention.

FIG. 5 is a sectional view of a chuck mechanism of the disk drive according to the second embodiment of the present invention;

FIG. 6A is a sectional view of the disk device according to the second embodiment of the present invention during operation of the chuck mechanism. FIG. 6B is a sectional view of the disk device of the second embodiment of the present invention during operation of the chuck mechanism.

FIG. 7 is a sectional view of a chuck mechanism of a conventional disk drive.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc 1a Center hole 2 Ball 3,13 Elastic body 3a, 13a Elastic tongue piece 4 Rotating body 5 Rotation axis

Claims (4)

[Claims] 1. A rotating shaft, a rotating body that rotates about the rotating shaft, an elastic body located inside a center hole of a disk placed on the rotating body, and an outer end of the elastic body. A chucking mechanism for a disk drive, comprising: a ball mounted and resiliently contacting an inner end surface of the center hole by centrifugal force during rotation. 2. The elastic body is a dish-like body, and the outer end of the dish-like body is partially cut out to form an elastic tongue, and the ball is attached to the outer end of the elastic tongue. 2. The chuck mechanism according to claim 1, wherein the chuck mechanism is mounted. 3. A rotating shaft, a rotating body that rotates about the rotating shaft, and an elastic body located inside a center hole of a disk placed on the rotating body, wherein the elastic body is a dish-shaped body. Wherein the outer end of the dish-shaped body is partially cut out to form an elastic tongue, and the elastic tongue elastically contacts the inner end surface of the center hole to fix the disk. Disk device chuck mechanism. 4. A chuck mechanism for a disk drive according to claim 3, wherein said elastic tongue is bent in an annular shape.