KR20060054986A - Disk damper and hard disk drive having the same - Google Patents

Abstract

Disc dampers and hard disk drives having the same are disclosed. The disclosed hard disk drive includes a base member, a spindle motor installed on the base member, a plurality of disks for storing data mounted on the spindle motor, and a rotationally mounted on the base member to form a read / write head on the disk. An actuator for moving to a position and a disk damper disposed between the plurality of disks to reduce vibration of the disk. The disk damper has a wedge shape in which the disk radial cross section becomes thicker toward the outer circumference of the disk. Therefore, the distance between the disk and the disk damper gradually decreases from the inner circumference of the disk to the outer circumference of the disk. The disk damper having such a configuration can not only protect the data recording surface of the disk from external shocks, but also can effectively reduce the vibration of the disk.

Description

Disk damper and hard disk drive having the same

1 is a perspective view showing a conventional disk damper installed between the disks.

2 is a vertical cross-sectional view of the disk and the disk damper shown in FIG.

3 is an exploded perspective view illustrating a hard disk drive having a disk damper according to a preferred embodiment of the present invention.

4 is a vertical cross-sectional view of the disk damper and the disk shown in FIG.

5 is a perspective view showing a disk damper according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

111.Base member 112 ... Cover member

114 ... gasket 119 ... fastening screw

120a, 120b ... disk 130 ... spindle motor

132 ... spacer 134 ... disc clamp

140 ... actuator 142 ... slider

144 Suspension 146 Swing arm

147 ... actuator pivot 148 ... voice coil motor

150,250 ... disk damper 154,254 ... supporting protrusion

159,259 fixing screws

The present invention relates to a hard disk drive, and more particularly to a disk damper for reducing vibration of a rotating disk and a hard disk drive having the same.

A hard disk drive (HDD), which is one of information storage devices of a computer, is a device for reproducing data stored on a disc or recording data on a disc using a read / write head. In such a hard disk drive, the head performs its function while being moved to a desired position by an actuator in a state in which the head rises a predetermined height from the recording surface of the rotating disk.

Such a hard disk drive includes a spindle motor, one or a plurality of data storage disks mounted on the spindle motor, and an actuator for moving a read / write head for reproducing and writing data to a predetermined position on the disk. .

The disk, spindle motor and actuator are wrapped by a housing consisting of a base member and a cover member. The base member and the cover member are assembled using a plurality of fastening screws.

On the other hand, in the hard disk drive having such a configuration, fluttering occurs in the rotating disk due to component defects in the spindle motor, eccentric assembly of the disk, irregular air flow in the hard disk drive, and the like. In particular, there is a non-negligible air flow around the high-speed rotating disk, such as the space between the disks, which is the biggest factor causing the vibration of the disk. When vibration occurs on the disc as described above, track misalignment (TMR) and position error signal (PES) increase, which degrades the read / write head's ability to record and play data. This will adversely affect the performance of the disk drive.

Recently, in order to improve such a problem, a method of providing a thin disk-shaped disk damper between the disks has been proposed.

1 is a perspective view showing a conventional disk damper installed between the disks, and FIG. 2 is a vertical cross-sectional view of the disk and disk damper shown in FIG.

1 and 2 together, a plurality of disks 31 and 32 are mounted on the spindle motor 20 installed on the base member 10 of the hard disk drive, and between the disks 31 and 32. The disk damper 40 is provided in this. If the disk damper 40 is installed between the disks 31 and 32 in this way, the distance between the disks 31 and 32 and the disk damper 40 is narrowed, and thus the disks 31 and 32 and the disks are thus narrowed. Vibration of the disks 31 and 32 can be reduced by the damping effect of the compressed air between the dampers 40. At this time, the narrower the space between the disks 31 and 32 and the disk damper 40, the more rigid the air therebetween, and the vibration reduction effect of the disks 31 and 32 becomes higher.

However, when the hard disk drive is inoperable or the hard disk drive is subjected to an impact test, when the hard disk drive is shocked, the disks 31 and 32 are shaken up and down. At this time, as the disk damper 40 is installed between the disks 31 and 32 as described above, the distance between the disks 31 and 32 and the disk damper 40 is narrowed, so that the disks 31 and 32 are separated. There is a high possibility that a problem that the collision with the disk damper 40 occurs. In this case, the data recording surfaces of the disks 31 and 32 may be damaged, and an error may occur during a read / write operation.

The present invention has been made to solve the above-mentioned problems of the prior art, and in particular, a disk damper having a shape capable of reducing the vibration of the disk and protecting the data recording surface of the disk from external shock and a hard disk having the same. The purpose is to provide a drive.

In order to achieve the above technical problem, the present invention,

A disk damper of a hard disk drive disposed between a plurality of disks mounted on a spindle motor of a hard disk drive to reduce vibration of the disk.

The disk damper is hard, characterized in that the disk radial cross-section of the disk in the wedge shape gradually becomes thicker toward the outer circumference of the disk, so that the distance from the disk toward the outer circumference of the disk is gradually narrowed toward the outer circumference of the disk. Provides a disk damper for the disk drive.

In the present invention, the disk damper may have a ring shape of which part is open or a rod shape extending from the outer circumferential side of the disk to the inner circumferential side of the disk. In the latter case, the disk damper is preferably disposed at a portion adjacent to the actuator of the hard disk drive. On the other hand, a plurality of disk dampers may be arranged at predetermined intervals along the circumferential direction of the disk.

And, in order to achieve the above technical problem, the present invention,

A base member; A spindle motor mounted on the base member; A plurality of data storage disks mounted to the spindle motor; An actuator rotatably mounted on the base member for moving the read / write head to a predetermined position on the disk; And a disk damper disposed between the plurality of disks to reduce vibration of the disk.

The disk damper is hard, characterized in that the disk radial cross-section of the disk in the wedge shape gradually becomes thicker toward the outer circumference of the disk, so that the distance from the disk toward the outer circumference of the disk is gradually narrowed toward the outer circumference of the disk. Provide a disk drive.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the following drawings indicate like elements.

3 is an exploded perspective view illustrating a hard disk drive having a disk damper according to a preferred embodiment of the present invention, and FIG. 4 is a vertical cross-sectional view of the disk damper and the disk shown in FIG.

3 and 4 together, a hard disk drive according to the present invention includes a plurality of data storage disks (120a, 120b), a spindle motor 130 for rotating the disks (120a, 120b), An actuator 140 is provided for moving a read / write head to a predetermined position on the disks 120a and 120b.

The disks 120a and 120b, the spindle motor 130, and the actuator 140 are wrapped and protected by the base member 111 and the cover member 112. The base member 111 and the cover member 112 are coupled to each other by a plurality of fastening screws 119. At this time, a gasket 113 is inserted between the base member 111 and the cover member 112 to prevent dust or moisture from flowing into the hard disk drive.

The disks 120a and 120b are recording media for recording data, and a plurality of disks 120a and 120b are mounted on the spindle motor 130 to be rotated by the spindle motor 130.

The spindle motor 130 is for rotating the disks 120a and 120b and is installed on the base member 111. When the plurality of disks 120a and 120b are mounted on the spindle motor 130 as described above, a ring-shaped spacer 132 for maintaining the gap between the disks 120a and 120b is provided with the disks 120a. , And a disk clamp 134 is coupled to the upper end of the spindle motor 130 to prevent the disks 120a and 120b from being separated from each other.

The actuator 140 is used to move a read / write head for recording data on the discs 120a and 120b or reproducing the recorded data to a predetermined position on the discs 120a and 120b. The base member 111 It is installed to be rotatable on the phase. In detail, the actuator 140 includes a swing arm 146 rotatably coupled to an actuator pivot 147 installed on the base member 111, and is mounted at one end of the swing arm 146 to mount the head. And a suspension 144 for elastically biasing the slider 142 to the surfaces of the disks 120a and 120b, and a voice coil motor VCM for rotating the swing arm 146.

The voice coil motor 148, controlled by a servo control system, causes the swing arm 146 to rotate in a direction conforming to Fleming's left hand law by the interaction of a current input to the VCM coil with a magnetic field formed by the magnet. do. That is, when the power of the hard disk drive is turned on and the disk 120a 120b starts to rotate, the voice coil motor 148 rotates the swing arm 146 to mount the read / write head slider 142. Is moved onto the data recording surfaces of the discs 120a and 120b. The slider 142 rises a predetermined height from the surfaces of the disks 120a and 120b, that is, the data recording surface, by lift generated by the rotating disks 120a and 120b, and is mounted on the slider 142 in such a state. The used head performs a function of reproducing or recording data on the recording surfaces of the discs 120a and 120b. Conversely, when the hard disk drive is not operating, i.e., when the rotation of the disks 120a and 120b is stopped, the voice coil motor 148 rotates the swing arm 146 to move the head mounted slider 142. The data is recorded off the data recording surfaces of the discs 120a and 120b.

In addition, the hard disk drive according to the present invention includes a disk damper 150 disposed between the disks 120a and 120b. The disk damper 150 serves to reduce vibrations of the disks 120a and 120b. In particular, the disk damper 150 according to the present invention has a shape capable of preventing damage to the data recording surface of the disks 120a and 120b due to external impact.

Specifically, the disk damper 150 has a thin plate shape and is disposed between the disks 120a and 120b. As shown in the drawing, when the two disks 120a and 120b are mounted on the spindle motor 130, one disk damper 150 is disposed between the two disks 120a and 120b and the spindle motor ( When three or more disks are mounted at 130, the disk dampers 150 are disposed one by one between adjacent disks. The disk damper 150 is fixed to and supported by the base member 111. To this end, a plurality of support protrusions 154 protrude from the outer circumference of the disk damper 150. The support protrusions 154 are fixed to the base member 111 by the fixing screw 159. The disk damper 150 may be manufactured by press working of aluminum sheet, aluminum die casting or plastic injection molding.

The disk damper 150 preferably has a large enough area so as not to interfere with other components of the hard disk drive, such as the actuator 140. This is because more effective air damping effect can be obtained as the mutually opposing areas of the disk damper 150 and the disks 120a and 120b are wider. Specifically, the disk damper 150 may have a ring shape in which a portion including the operating range of the actuator 140 is opened.

As described above, the disk damper 150 according to the present invention has a shape capable of preventing damage to the data recording surfaces of the disks 120a and 120b due to external impact. Specifically, the disk radial section of the disk damper 150 has a wedge shape that gradually thickens from the inner circumferential side to the outer circumferential side of the disks 120a and 120b. According to the disk damper 150 having such a shape, the gap between the bottom surface of the disk damper 150 and the upper surface of the lower disk 120a facing the upper surface of the disk damper 150 and the upper disk facing the disk damper 150 are provided. The interval between the bottoms of the 120b becomes gradually narrower from the inner circumferential side to the outer circumferential side of the disks 120a and 120b. For example, an interval between the disk damper 150 and the disks 120a and 120b may be reduced from about 1 mm to about 0.3 mm as it goes from the inner circumference side to the outer circumference side of the disks 120a and 120b.

As described above, when the wedge-shaped disk damper 150 is installed between the disks 120a and 120b, the gap between the disk damper 150 and the outer edge portion of the disks 120a and 120b becomes the narrowest. . Therefore, even when the hard disk drive is not in operation or an impact is applied to the hard disk drive during the impact test, even if the disk damper 150 is in contact with the disks 120a and 120b, the contact point is outside the disks 120a and 120b. It is located at the edge of the side. In general, since data is not recorded on the outer edge portions of the discs 120a and 120b, even if damage due to a collision occurs in this portion, the data recorded on the data recording surface of the discs 120a and 120b positioned therein is not included. Does not affect

When the disks 120a and 120b are rotated during the operation of the hard disk drive, the disks 120a and 120b are shown between the disk dampers 150 and the disks 120a and 120b as indicated by arrows in FIG. 4. A flow of air toward the outside of the is formed, and the vibration of the disks 120a and 120b can be reduced by the damping action of the air. In particular, according to the disk damper 150 according to the present invention, the distance between the disk damper 150 and the disk (120a, 120b) becomes gradually narrower toward the outer circumference of the disk (120a, 120b), the disk (120a, 120b) The flow rate of air generated at the time of rotation) increases gradually toward the outer circumference of the discs 120a and 120b, thereby increasing the rigidity of the air in this region. Typically, when vibrations occur in the discs 120a and 120b, the vibration width is greatest at the outer edge portions of the discs 120a and 120b, and as described above, the stiffness of the air in this region becomes high. The vibration of the disks 120a and 120b can be reduced more effectively.

Thus, according to the disk damper 150 according to the present invention, not only can the data recording surfaces of the disks 120a and 120b be protected from external shocks, but also the vibration of the disks 120a and 120b, which is an original function thereof, can be reduced more effectively. You can.

5 is a perspective view showing a disk damper according to another embodiment of the present invention.

Referring to FIG. 5, the disk damper 250 according to another embodiment of the present invention has a rod shape extending from the outer circumferential side of the disks 120a and 120b to the inner circumferential side of the disks 120a and 120b. A support protrusion 254 protrudes from the outer circumference of the rod-shaped disk damper 250, and the support protrusion 254 is fixed to the base member 111 by a fixing screw 259. The disc damper 250 has a disc radial cross section of the discs 120a and 120b so as to prevent damage to the data recording surface of the discs 120a and 120b due to an external impact as in the above-described embodiment. It has a wedge shape that gradually thickens from the inner circumference side to the outer circumference side.

A plurality of disk dampers 250 having such a shape may be disposed at predetermined intervals along the circumferential direction of the disks 120a and 120b. Meanwhile, only one disk damper 250 may be disposed at a portion adjacent to the actuator 140 on which the read / write head is mounted. This is because vibration of the disks 120a and 120b in the region adjacent to the actuator 140 may have the most influence on the performance of the read / write head.

The operation and effects of the disk damper 250 according to another embodiment of the present invention described above are the same as the disk damper 150 shown in FIG.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the appended claims.

As described above, according to the present invention, even if an external shock is applied to the hard disk drive or the disk damper contacts the disk during the impact test process, the contact point is located at the outer edge of the disk. There is no contact with the disc damper. In addition, the flow rate of air generated when the disk rotates becomes faster toward the outer circumference of the disk, thereby increasing the rigidity of the air at the outer edge of the disk. Therefore, the disk damper according to the present invention can not only protect the data recording surface of the disk from external shock, but also can effectively reduce the vibration of the disk.

Claims (10)

A disk damper of a hard disk drive disposed between a plurality of disks mounted on a spindle motor of a hard disk drive to reduce vibration of the disk. The disk damper is hard, characterized in that the disk radial cross-section of the disk in the wedge shape gradually becomes thicker toward the outer circumference of the disk, so that the distance from the disk toward the outer circumference of the disk is gradually narrowed toward the outer circumference of the disk. Disk damper on the disk drive. The method of claim 1, The disk damper is a disk damper of the hard disk drive, characterized in that it has an open ring portion. The method of claim 1, And the disk damper has a rod shape extending from the outer circumference of the disk to the inner circumference of the disk. The method of claim 3, wherein The disk damper is a disk damper of the hard disk drive, characterized in that disposed in the area adjacent to the actuator of the hard disk drive. The method of claim 3, wherein And a plurality of disk dampers are arranged at predetermined intervals along the circumferential direction of the disk. A base member; A spindle motor mounted on the base member; A plurality of data storage disks mounted to the spindle motor; An actuator rotatably mounted on the base member for moving the read / write head to a predetermined position on the disk; And And a disk damper disposed between the plurality of disks to reduce vibration of the disk. The disk damper is hard, characterized in that the disk radial cross-section of the disk in the wedge shape gradually becomes thicker toward the outer circumference of the disk, so that the distance from the disk toward the outer circumference of the disk is gradually narrowed toward the outer circumference of the disk. Disk drive. The method of claim 6, And the disk damper has a ring shape in which a portion including an operating range of the actuator is open. The method of claim 6, And the disk damper has a rod shape extending from the outer circumference of the disk to the inner circumference of the disk. The method of claim 8, And the disk damper is disposed at a portion adjacent to the actuator. The method of claim 8, And a plurality of disk dampers are arranged at predetermined intervals along the circumferential direction of the disk.

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