KR20000010044A - Disk device - Google Patents

Abstract

PURPOSE: Disk device is provided to reduce noise and vibration of a disk while a disk is driving and rotating. CONSTITUTION: The disk device comprises: a disk safe arrival surface, a turn table, a tray surface, a disk, a guide rib, a spindle motor. The turn table is rotated by the spindle motor. The disk is on the turn table. The disk safe arrival surface contacts on the turn table. The guide rib in an outside of disk prevents a release of disk while the disk is setting vertically. A height of the tray surface has a same height or lower than a height of the disk surface while the disk is rotating. The disk device reduces noise in the disk driving device and also reduces vibration of the disk.

Description

Apparatus of Disc

The present invention relates to a tray for transferring an optical recording medium to an access position in a disc drive device, and more particularly, to a disc device configured to reduce noise and vibration generated when a disc is rotated.

Usually, a disc drive device is provided with a tray for transferring a disc to an access position. That is, when the ejection of the tray is completed by the ejection mechanism of the disk drive, the disk is mounted on the tray, and then the disk mounted on the tray is transferred to the access position by the loading mechanism of the disk drive. . The operation mechanism of the disc drive device will be described by dividing the discharge completion time and the loading completion time. Ejection completion point refers to when the sled base is lowered by mechanical interaction when the tray in the disc drive is transported outward as much as possible. After ejection is complete, load the desired disc on top of the tray. When the tray is moved to the access position inside the disc drive, the sled base moves up-rising by mechanical interaction. This time is called loading completion time. When loading is complete, the tray is located on top of the turntable, and as the sled base rises, the spindle motor attached to the sled base also rises, raising the turntable attached to the spindle motor. Let's go. At this time, the turntable coincides with the inner diameter of the disk seated on the tray, and the hub of the disk and the turntable come into contact with each other to maintain a constant gap between the disk and the tray. In addition, as the spindle motor rotates, its rotational force is transmitted to the disc via the turntable.

Referring to FIG. 1, the disk apparatus according to the related art has a disk seating surface 6 formed to mount a disk on its upper part, and a stepped portion 8 formed to have a predetermined height on the outer circumferential side of the disk seating surface 6. And a tray opening 18 formed by removing part of the step portion 8 and the disc seating portion 6 so that the data on the disc can be accessed. The disk seating surface 6 is formed of the first and second disk seating surfaces 6a, 6b having different diameters for mounting the CD and DVD-series disks, and the first and second disk seating surfaces ( 6a and 6b have a predetermined step. Looking at the disk seating surface 6 formed on the upper tray, since the position of the disk seated on the tray (2) during the disk loading affects the loading accuracy of the turntable 14, the range of the disk seating surface In order to implement this, first and second disk seating surfaces 6a and 6b having a diameter of 80 mm and 120 mm are formed on the upper end of the tray 2 to form the first seating surface 6a. ) Mounts the CD-based disk and mounts the DVD-based disk on the second seating surface 6b to limit the position of the disk seated on the tray 2. Meanwhile, the stepped portion 8 is formed of first and second stepped portions 8a and 8b having a predetermined height (that is, h) on the outer circumferential side of the disc seating surface 6, and the stepped portion 8 ), First to fourth guide ribs 4a to 4d are formed to guide the outer diameter of the disk when the disk is rotated. On the other hand, with reference to Figure 2 will be described with respect to the air flow (Air Flow) during the rotational drive of the disk. When the loading of the disk 12 is completed, the inner diameter of the disk 12 and the turntable 14 contact each other to maintain a constant gap between the disk 12 and the tray 2, and the rotational force of the spindle motor 16 causes the disk to rotate. It is transmitted to (12) to rotate the disk (12). At this time, between the stepped portion 8 formed at a predetermined height (that is, h) adjacent to the outer circumferential side of the disc 12 and the outer circumference of the disc, a high-speed air flow ejected toward the outer circumferential side of the disc is subjected to resistance under the stepped portion. The pressure and velocity distributions change rapidly. As a result, when the disc is driven to rotate, the disc drive device generates noise that may cause discomfort to the user. That is, inside the disc drive device, the sound wave generated by the air flow according to the high speed rotation of the disc (that is, the sound wave generated by the difference in the pressure gradient of the air) is transmitted to the outside, thereby generating a relatively large noise. have. In addition, the disk vibrates when the disk is rotated, making it difficult to control the servo, such as focusing and tracking, during recording and playback. That is, the vibration of the disk due to the pressure gradient of the air between the step 8 and the outer periphery of the disc makes it difficult to control the servo, such as focusing and tracking, during recording / reproduction, thereby degrading recording or reproducing. In addition, since the stepped portion on the outer peripheral side of the disk is adjacent, the flow of air blown out from the disk hits the stepped portion, whereby a backflow that flows back into the disk side occurs, which further increases the noise level. In particular, as the disk becomes denser, noise in the disk drive and vibration of the disk caused by the high-speed rotation of the disk are emerging as problems to be solved.

Accordingly, an object of the present invention is to provide a disk device configured to reduce noise and vibration generated when the disk is rotated.

1 is a perspective view showing the structure of a disk apparatus according to the prior art.

2 is a cross-sectional view of FIG.

3 is a perspective view showing the structure of a disk apparatus according to the present invention;

4 is a cross-sectional view of FIG.

Fig. 5 is a diagram showing measurement points for measuring noise in the disk apparatus of the present invention and the conventional disk apparatus.

6 shows the noise level measured at the measuring points of FIG.

7 is a diagram showing the vibration width of the disk according to the rotational speed of the disk.

<Description of Symbols for Main Parts of Drawings>

2,22 tray 4,24 guide rib

6,26: disk seating surface 8,28: stepped portion

10,30: disc drive device 12,32: disc

14,34: turntable 16,36: spindle motor

18: tray opening

In order to achieve the above object, the disk apparatus according to the present invention is formed such that a tray surface facing the outer circumferential side of the disk seated on the disk seating surface has a height equal to or lower than that of the disk surface when the disk is rotated.

In addition, the disk apparatus according to the present invention is formed such that the stepped portion is removed in a vertical direction and a horizontal direction so that the stepped portion adjacent to the disk surface has the same height or the same height as the disk surface when the disk is rotated. do.

Other objects and features of the present invention other than the above object will become apparent from the description of the embodiments with reference to the accompanying drawings.

With reference to Figures 3 to 7 will be described a preferred embodiment of the present invention.

Referring to FIG. 3, a disk device according to the present invention includes a disk seating surface 26 formed to mount a disk on its upper part, and a guide formed on the outer peripheral side of the disk to prevent the disk from being separated when the disk is set vertically. It has a rib 24 and a tray surface 27 formed to face the outer peripheral side of the disk to have the same height as the disk surface or have a lower height when the disk is rotated. The disk seating surface 26 is formed of the first and second disk seating surfaces 26a and 26b having different diameters for mounting the CD and DVD-type disks, and the first and second disk seating surfaces ( 26a and 26b have a predetermined step. Since the detailed description of the disk seating surface 26 is the same as that of FIG. 1, the detailed description will be omitted. Further, on the outer circumferential side of the disk seating surface 26, first to fourth guide ribs 24a to 24d are formed on the outer circumferential side of the disk to prevent the disk 32 from being separated when the disk 32 is set vertically. have. In addition, the tray surface 27 facing the outer circumferential side of the disk is formed to have the same or lower height than the disk surface during the rotational drive of the disk to facilitate the flow of air generated during the disk rotational drive.

On the other hand, at the rear end of the tray 22, a stepped portion 28 is formed to mount the circuit of the disc drive device 30. The stepped portion 28 is formed to have the same or lower height as the disk surface during the disk rotation drive. At this time, the inclined portion of the step portion 28 may be implemented in a straight line in order to smooth the flow of air generated in the disk during the rotational drive of the disc, the stepped portion 28 in consideration of the flow of air during the disc rotation drive It may be possible to implement the inclined portion in the form of an inclined line.

On the other hand, with reference to Figure 4 will be described with respect to the air flow (Air Flow) during the rotational drive of the disk. When the loading of the disk 32 is completed, the inner diameter of the disk 32 and the turntable 34 come into contact with each other to maintain a constant gap between the disk 32 and the tray 22, and the rotational force of the spindle motor 36 It is transmitted to (32) to rotate the disk (32). The flow of air generated when the disk 32 rotates is smoothly formed along the inclined surfaces of the tray surface 27 and the stepped portion 28. That is, in the conventional tray structure, a stepped portion having a predetermined height (i.e., h) is formed on the outer circumferential side of the disk, so that the air pressure and velocity distribution between the disk outer circumference and the stepped portion suddenly change smoothly when the disk is rotated. Although the flow of air was difficult, the tray structure of the present invention has a tray surface 27 and a step portion 28 having the same or lower height as the disk surface when the disk is rotated, so that the air flows when the disk is rotated. It is made smoothly to reduce the noise generated inside the disk drive device, and also to reduce the vibration of the disk. In addition, the backflow of air entering the inside of the disc is also reduced, which significantly improves the noise level.

Hereinafter, the noise reduction and the vibration reduction of the disk inside the disk drive apparatus will be described with reference to FIGS. 5 to 7. 15 measuring points (a, b, c, d, e, f, g, h, I, j, k, l, m, n, p) for measuring noise in the tray of the present invention and conventional trays 5 is shown. At this time, the rotation speed of the disk is set at 6500 rpm. The noise level measured at the measurement points of FIG. 5 will be described with reference to FIG. 6. In the tray of the present invention, it can be seen that less noise is generated than conventional trays at all 15 measurement points. In particular, at the measurement points of h and g, the noise level difference is quite large depending on the presence of the stepped portion. As shown in FIG. 6, the tray of the present invention having the stepped portion adjacent to the outer circumference of the disk has a lower noise level than the conventional tray, thereby reducing noise generated in the disk driving apparatus.

On the other hand, the vibration width measurement results of the disk according to the rotational speed of the disk is shown in FIG. Referring to FIG. 7, 1 'represents the vibration amplitude characteristic curve of the disk when the disk is rotated by mounting the disk to the disk driving apparatus without using the tray, and the vibration width of the disk is considerably large. 3 'shows the vibration width characteristic curve of the disk when rotating the disk mounted in the conventional tray, and the vibration width increases slightly as the rotation speed increases, and then gradually decreases. It can be seen that it has a similar vibration width. 5 'shows the vibration width characteristic curve of the disk when the disk is mounted on the tray of the present invention, and it can be seen that the vibration width decreases as the rotation speed increases. That is, the tray of the present invention will have a more stable vibration characteristics at high speed rotation. As a result, the tray according to the present invention stably records / reproduces information on the disc.

As described above, the disk apparatus according to the present invention is formed to have a stepped portion or a tray surface having the same or lower height (that is, h ') than the disk surface at the time of disk rotation drive to reduce the noise inside the disk drive apparatus In addition, there is an advantage that can reduce the vibration of the disk.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (7)

A disk device having a disk tray for seating a disk on a disk seating surface and transporting the disk to a disk drive position, the disk device comprising: And a tray surface facing the outer circumferential side of the disk seated on the disk seating surface to have a height equal to or lower than that of the disk surface when the disk is rotated. The method of claim 1, And a plurality of guide ribs formed on the outer circumferential side of the disk to prevent the disk from being separated when the disk is set vertically. The method of claim 1, And a seating surface for seating a small disk on an inner surface of the seating surface of the disk. The method of claim 1, And a stepped portion having a predetermined height for protecting the disk drive circuit at a rear end of the disk tray. The method of claim 4, wherein The inclined portion facing the seating surface of the disk at the stepped portion may be configured in any one of the form of straight line and inclined line. A disk apparatus having a disk tray having a stepped portion formed to face the outer peripheral side of the disk seating surface at a constant height with the disk seating surface, And the stepped portion is removed in a vertical direction and a horizontal direction so that the stepped portion adjacent to the disk surface is formed to have the same height or the same height as the disk surface when the disk is rotated. The method of claim 6, And a plurality of guide ribs formed on the outer circumferential side of the disk to prevent the disk from being separated when the disk is set vertically.