JP2002025240A - Disk drive assembly and drawer frame for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the noise (cavity sound) by accompanying the high-speed rotation of a disk with a drawer frame 50. SOLUTION: The disk 70 is arranged in proximity to the surface of a flat part 51 of a circular region A52 of the drawer frame 50. A height limiting part 42 where the height from the flat part described above attains nearly the same height as the height of the top surface of the disk arranged in the prescribed position of the circular region described above or below is formed in a circumferential part integrally formed in such a manner that the circumference of the region described above builds up at least partly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive for rotating an optical disk or a magnetic disk and a drawer frame thereof, and more particularly to a disk drive capable of effectively reducing noise caused by high-speed rotation of the disk. It was made.

[0002]

2. Description of the Related Art A disk drive of a rotary storage medium such as a CD-ROM, a DVD, and a hard disk is used by being incorporated in a personal computer or a dedicated playback device. The storage capacity of these rotary storage media has been increasing due to technological development. For this reason, there is a demand for a disk drive having a higher disk rotation speed so as to realize high-speed reading and writing of data.

For example, assuming that the reference rotation speed (220 rpm) of the initial disk drive is 1, the current speed is 10
Double speed (2200 rpm), 20 times speed (4400 rpm)
Are commercially available. More recently, a 40-times speed has been developed.

[0004]

As described above, as the rotational speed of the disk increases, in the disk drive device, the wind noise accompanying the rotation of the disk increases, which is a main factor of the noise source. .

Conventionally, in order to suppress noise from leaking to the outside, the hermeticity of the space around the disk arrangement portion is enhanced.
However, this surrounding space is not completely sealed. This is because, on the other hand, downsizing of the disk drive device is required, and downsizing of peripheral components and effective use of the space around the disk are required for the downsizing. For this reason, the noise as described above cannot be effectively suppressed, and as a result, the noise increases as the rotational speed of the disk increases.

It is therefore an object of the present invention to provide a disk drive device and a drawer frame for the disk drive device, which can reduce noise (cavity sound) due to high-speed rotation of the disk.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a drawer frame having a substantially circular area in which a disk is disposed in close proximity to a plane of a flat portion, the drawer frame having a substantially circular area. A height limit that the height from the flat portion is substantially equal to or less than the height of the upper surface of the disk disposed at a predetermined position in the circular region with respect to a peripheral portion integrally formed so as to swell at least partially. Forming part.

According to another aspect of the present invention, there is provided a disk drive apparatus having a disk rotation mechanism for rotatably holding a disk in a housing, and a drawer for holding the disk rotation mechanism and sliding the disk in and out of the housing. A drawer frame provided in the drawer has a substantially circular area in which a disc is arranged in proximity to a surface of a flat part, and a peripheral part integrally formed so as to swell at least at a part of the periphery of the area In contrast, a height-restricted portion is formed in which the height from the flat portion is substantially equal to or less than the height of the upper surface of the disk disposed at a predetermined position in the circular region.

[0009]

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

First, an outline of a disk drive device will be described with reference to FIG. FIG. 1 shows a state in which the drawer 20 has been pulled out from a cabinet (cabinet) 10. Case 10
Has a box-like shape in which the drawer 20 is pulled out, and has a bottom housing (bottom cabinet) 10A and a top plate (top cabinet) 10B attached so as to cover the bottom housing 10A. A PC board on which a control circuit for controlling the drive device is mounted is disposed inside the rear side of the housing 10. Further, a flexible cable, a solenoid, and the like connected to the PC board are also arranged.

A slide holder is provided on each of both sides inside the bottom housing 10A, and a slide 30 is slidably provided on each slide holder. Then, with respect to this slide 30, drawer 2
The slide holder 40 provided at the position 0 is slidably mounted. In the figure, a slide mechanism on one side is shown, but a similar mechanism is provided on the other side. As a result, the drawer 20 moves
It is movable in the direction of the arrow XX shown in the figure.

The drawer 20 has a drawer frame 50. The drawer frame 50 has the features of the present invention, and will be described in detail with reference to FIG. The drawer frame 50 has a substantially circular area A52 in which the disk 70 is arranged close to the surface of the flat part 51, and the area A5
The height from the flat portion 51 with respect to the peripheral portion 53 integrally formed so as to swell at least at a part of the periphery of 2 is
For example, a height limiting portion 54 which is arranged at a predetermined position in the circular area 52A and is substantially equal to or less than the height of, for example, the upper surface of the disk when chucked is formed.

A central portion of the flat portion 51 of the drawer frame 50 is opened, and the chassis 60 is arranged so as to close this opening and to be located on substantially the same plane as the flat portion 51.
A turntable 80 for rotating and driving the disk 70 is exposed in a hole formed in the chassis 60. A disk motor for rotating the turntable 80 is attached to the lower surface of the chassis 60.

An elongated opening is formed in the chassis 60 so that a light beam from the optical head of the pickup unit 90 can pass therethrough. The pickup unit 90 is configured to be able to reciprocate (in the direction indicated by arrows Y-Y in the figure) below the chassis 60 along the longitudinal direction of the elongated opening. A shaft, a gear mechanism, a feed motor, and the like for this purpose are provided at a lower portion of the chassis 60, and a flexible cable is used at a portion for performing an electrical connection, and is electrically connected to the PC board.

When the drawer 20 is inserted into the housing 10, a bezel plate 55 provided on the drawer 20 is provided.
Closes the opening of the housing 10.

FIG. 2 is a view for explaining the interval H between the shape surface of the disk 70 and the top plate 10B when the disk 70 is mounted at a predetermined position. This interval H is very small, approximately 0.5 to 1.5 mm.

FIG. 3 is a perspective view showing only the drawer 20 as viewed from the upper side, and FIG. 4 is a perspective view showing only the drawer 20 as viewed from the lower side.

FIG. 5 shows a drawer 20 and a housing 10.
Shows the state where the bottom housings 10B of FIG.
FIG. 6 is a perspective view showing the bottom housing 10B as viewed from below.

FIGS. 7A and 7B show the results of measuring the noise from the front by rotating the disk in a personal computer equipped with the disk drive of the present invention. The measured frequency is an octave frequency, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz
Hz, AP. In the conventional device, 15.5 dB, 26.4 dB, 31.5 dB, 3
It was 3.2 dB, 26.3 dB, and 36.4 dB. On the other hand, according to the apparatus of the present invention, 14.5 dB, 2
5.7dB, 30.8dB, 30.8dB, 22.9d
B, 34.8 dB. That is, the apparatus of the present invention operates at each measurement frequency at -1, -0.7, -0.7, -2.
It can be seen that 4, -3.4 and -1.6 dB are also improved.

As described above, when the height limiting portion 54 is provided on a part or the whole of the raised portion (peripheral portion) around the area A53, the following position is preferable. That is, it is preferable to provide the height restricting portion 54 on the side opposite to the side where the pickup unit is arranged (in this case, the back side) in the moving direction of the drawer 20 with respect to the housing 10. That is, the height limiting portion is provided on the edge side opposite to the edge side where the elongated hole opened for disposing the pickup unit is located.

The reason for this is that, on the side where the pickup unit is provided, the air under the disk tends to escape from the elongated hole through which the beam passes, but the air density at the bottom of the disk tends to increase at the back. is there. If the difference in air density at the bottom of the disk is large, the outer peripheral side of the disk may warp in the upper surface direction.

FIGS. 8A and 8B show the disk 7
0 is arranged at a predetermined position, is chucked, and rotates when the wind flow is generated.
0 and a part of the conventional drawer 20A corresponding thereto are shown for comparison. According to the apparatus of the present invention, the wind generated by the rotation of the disk 70 is
4, and the phenomenon that the outer peripheral side of the disk warps toward the upper surface is also eliminated. Such a combined effect stabilizes the rotation of the disk and reduces noise.
On the other hand, in the conventional device, the peripheral portion 53A of the drawer 20A is higher than the upper surface of the disk 70,
The wind generated by the rotation of the disk 70 collides with the wall of the peripheral portion 53A, and the amount of the air wrapping around the lower surface of the disk 70 increases. As a result, a phenomenon occurs in which the outer peripheral side of the disk is warped toward the upper surface. As a result, the rotation of the disk becomes unstable,
Noise is generated as wind noise.

In the conventional drive, the height of the drawer around the disk is higher than the upper surface of the disk. On the other hand, making the height of the drawer lower than the upper surface of the disk means that the distance between the top plate and the drawer is widened, and that the space through which the wind flows is widened. When the amount of flowing wind is the same, the flow velocity becomes faster as the flowing space becomes narrower, and the flow velocity becomes slower as the flowing space becomes wider, so that the noise is reduced accordingly.

The present invention is not limited to the embodiment described above.

FIG. 9 shows various embodiments of the shape of the corners of the height limiting section 54. In FIG. 9A,
The height limiting portion 54 rises at a right angle from the flat portion 51,
The example of the shape which became a horizontal plane at right angles is shown. FIG.
(B) shows an example in which a corner of a rising portion from the flat surface 51 forms a rounded portion 541. FIG. 9 (C)
The example in which the angle of the rising part forms the taper part 542 is shown. Further, FIG. 9D shows an example in which a wall rising from the flat portion 51 is formed with a rounded portion 543 at a portion continuing to the upper surface of the height limiting portion 54. FIG. 9E shows an example in which a wall rising from the flat portion 51 is formed with a tapered portion 544 at a portion continuing to the upper surface of the height limiting portion 54.

The present invention is not limited to the above embodiment,
It goes without saying that the above embodiments may be implemented in combination with each other.

Further, in the above-described embodiment, two height limiting portions 54, 54 located at the left and right in the depth of the disk insertion direction are formed. But not limited to this,
Almost the same effects as in the above-described embodiment can be obtained by using only the left height limiter 54.

The present invention is not limited to the above embodiment.

As shown in FIG. 10, the entire area of the height restricting portion 54 may be the same height as the flat portion 51 of the drawer 20. In other words, a space is created between the edge of the disk and the peripheral portion 53 at the position of the height limiting portion 54. In this case, since the right height limit portion shown in FIG. 3 disappears, it is preferable to form a small piece stopper 511 rising from the frame edge at this position. This is effective when inserting a disk from the near side with the drawer 20 pulled out from the housing 10. That is, the stopper 511 prevents the disk from going too far into the drawer 20 and can assist in correctly mounting the disk to the chucking position. The other parts are the same as those in the previous embodiment, and thus the same reference numerals are given and the description is omitted.

The present invention is not limited to the above embodiment.

As shown in FIG. 11, the height restricting portion 54 and the peripheral portion 53 located at the back of the drawer 20 are all flat portions 5.
It may be the same plane as 1. In the case of such a configuration, since the height limiting portion and the peripheral portion disappear, it is preferable to form the plurality of small piece stoppers 512 and 513 so as to rise from the inner edge of the drawer frame 50.

Thus, the stopper 511 prevents the disk from going too far into the drawer 20 when the disk is mounted on the drawer 20, and assists the disk from being correctly mounted on the chucking position. Can be. The other parts are the same as those in the previous embodiment, and the same reference numerals are given and the description is omitted.

Further, the present invention is not limited to the above embodiment. An embodiment as shown in FIG. 12 may be used.

In the embodiment of FIG. 1 described above, the height limiting portion 54 is formed continuously to the peripheral portion 53, but in the embodiment of FIG. 12, the height of the height limiting portion 54 is Surrounding part 53
It is formed at the same height as. However, one or more holes 515 are formed in the wall rising from the flat surface 51.

[0035]

According to the present invention described above, it is possible to reduce noise caused by wind noise, which has conventionally occurred. In addition, since there is no warpage during rotation of the disk and stable rotation is obtained, signal reading errors are reduced.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view showing an overview of a disk drive device to which an embodiment of the present invention is applied;

FIG. 2 is an explanatory diagram of a distance between a top plate portion of a disk drive device to which the present invention is applied and an upper surface of a disk in a chucking state.

FIG. 3 is a perspective view showing only a drawer according to the present invention.

FIG. 4 is a perspective view showing a state where the drawer according to the present invention is viewed from below.

FIG. 5 is a perspective view showing a state in which the drawer according to the present invention is overlaid on the bottom plate housing.

FIG. 6 is a perspective view showing a state in which a bottom plate housing of the housing of the disk drive device according to the present invention is viewed from below.

FIG. 7 is an explanatory diagram showing a noise measurement result of the disk drive device according to the present invention when the disk is rotating, in comparison with that of the conventional device.

FIG. 8 is an explanatory diagram showing a comparison between the flow of airflow during rotation of the disk of the disk drive device according to the present invention and that of the conventional device.

FIG. 9 is a view showing an example of various shapes around a height restricting portion in the disk drive device according to the present invention.

FIG. 10 is a perspective view showing another embodiment of the present invention.

FIG. 11 is a perspective view showing still another embodiment of the present invention.

FIG. 12 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... housing | casing, 10A ... bottom housing | casing, 10B ... top plate part, 20
... drawer, 50 ... drawer frame, 51 ... flat part,
53: peripheral part, 54: height limiting part, 60: chassis, 7
0: disk, 80: turntable, 90: pickup unit.

Claims (10)

[Claims] 1. A drawer frame having a substantially circular region in which a disk is disposed in proximity to a surface of a flat portion, wherein a drawer frame is integrally formed so as to swell at least at a part of a periphery of the region. A drawer frame for a disk drive device, wherein a height-restricted portion whose height from the flat portion is substantially equal to or lower than the upper surface of a disk disposed at a predetermined position in the circular area is formed. . 2. The drawer frame of a disk drive device according to claim 1, wherein the height limiting portion is formed on all of the peripheral portion. 3. The disk drive device according to claim 1, wherein the height limiting portion is provided at a position substantially opposed to an insertion direction when the disk is loaded in the circular area. Drawer frame. 4. The disk according to claim 3, wherein a stopper for the disk is formed in the peripheral portion at a position facing the insertion direction separately from the height limiting portion.
The drawer frame of the disk drive device described. 5. The drawer frame of a disk drive device according to claim 1, wherein the corner of the height-restricted portion has a rounded shape. 6. The drawer frame for a disk drive according to claim 1, wherein the height-restricted portion is limited below a lower surface of the disk. 7. The drawer frame for a disk drive according to claim 1, wherein a portion where the height limit portion and the flat portion are continuous has a rounded or tapered portion. 8. The drawer frame according to claim 1, wherein the height of the height-restricted portion is substantially zero from the flat portion. 9. The disk drive according to claim 1, wherein the height limiting portion is provided on an edge side opposite to an edge side where an elongated opening opened for arranging the pickup unit is located. Equipment drawer frame. 10. A disk drive device comprising: a disk rotating mechanism that rotatably holds a disk in a housing; and a drawer that holds the disk rotating mechanism and slides in and out of the housing. The drawer frame provided in the has a substantially circular area where the disk is arranged in close proximity to the plane of the flat part,
A height from the flat portion with respect to a peripheral portion integrally formed so as to swell at least at a part of a periphery of the region is substantially equal to or less than a height of an upper surface of a disk disposed at a predetermined position in the circular region. A disk drive device, wherein a height-restricted portion is formed.