KR20080083884A - Disk damper with absorption filter in hard disk drive - Google Patents

Abstract

A disk damper with an absorption filter in a hard disk drive is provided to reduce the vibration of rotating disks and remove contaminants in the hard disk drive by forming the absorption filter between disks. A disk damper placed between plural disks of the hard disk to reduce the vibration of the disks comprises an absorption filter(160) for filtering contaminants inside the hard disk drive, and at least one filter mounting hole(154) in which the absorption filter is inserted. The absorption filter inserted into the filter mounting hole is supported by the disk damper, and has an absorption member(164) for absorbing the contaminants and a filter membrane(162) for covering the upper and lower surfaces of the absorption member.

Description

Disk damper with absorption filter in hard disk drive}

1 is a partial cross-sectional view of a conventional hard disk drive provided with disk dampers between disks.

2 is a cross-sectional view of a conventional breather filter installed in a cover member of a hard disk drive.

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 an enlarged perspective view illustrating the disk damper shown in FIG. 3.

FIG. 5 is a vertical sectional view of the disk damper along line AA ′ shown in FIG. 4.

<Explanation of symbols for 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 ... disc damper 151 ... support protrusion

152 ... Mounting screw 153 ... Screw insertion hole

154 ... Filter mounting hole 155

160 ... adsorption filter 162 ... filter membrane

164 ... Adsorbent

The present invention relates to a hard disk drive, and more particularly, to a disk damper of a hard disk drive having a function of reducing vibration of a rotating disk and a filtering function of a pollution source.

A hard disk drive (HDD), which is one of information storage devices of a computer and various electronic products, uses a read / write head to play data stored on a disk or to record data on a disk. Device. 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. have.

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.

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. As the vibration occurs in the disk as described above, the position error signal (PES) increases, which degrades the data recording and reproducing ability of the read / write head, and thus adversely affects the performance of the hard 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 partial cross-sectional view of a conventional hard disk drive provided with disk dampers between disks.

Referring to FIG. 1, a plurality of disks 30 are mounted on a spindle motor 20 installed on a base member 10 of a hard disk drive, and the plurality of disks 30 are spindled by a disk clamp 22. It is fixed to the motor 20. The plurality of disks 30 are held constant by their spacers 24. The disk damper 40 is installed between the disks 30. If the disk damper 40 is provided between the disks 30, the gap between the disk 30 and the disk damper 40 is narrowed, thereby reducing the occurrence of turbulence around the disk 30. In addition, the vibration of the disk 30 may be reduced by the damping effect of the compressed air between the disk 30 and the disk damper 40.

On the other hand, as the performance of the hard disk drive is recently improved, the sensitivity of the read / write head is also increased, resulting in a decrease in reliability due to micro contamination in the hard disk drive. Micro-contamination is caused by particles, moisture, chemical gases and the like, which can be present in the hard disk drive as well as in the external environment in which the hard disk drive is assembled or operated.

Moreover, with the recent increase in the recording density of discs, the gap between the read / write heads and the data storage discs has been reduced, increasing the possibility of defects caused by damage to the read / write heads due to particles or discs. In addition, as the data access speed is required, the rotational speed of the spindle motor also increases to increase the temperature inside the hard disk drive, and this temperature rise generates outgases from components or oil inside the hard disk drive. The chemical reaction caused by the outgas contaminates the surface of the read / write head or the disk, thereby reducing the reliability of the hard disk drive.

In order to prevent the micro-contamination, a breather filter and a recirculation filter are installed inside the hard disk drive. The recirculation filter is a filter designed to allow the air flow formed by the rotation of the disk to pass therethrough, and the fine particles contained in the air flow cannot be passed through the recirculation filter. The breather filter is used to eliminate pressure difference inside and outside the hard disk drive while preventing contaminants from penetrating into the hard disk drive.

2 is a cross-sectional view of a conventional breather filter installed in a cover member of a hard disk drive.

Referring to FIG. 2, the breather filter 60 has a plastic body 62 attached by an adhesive 55 to the inner surface of the cover member 50. A diffusion channel 64 is formed in the plastic body 62, and the diffusion channel 64 communicates with a hole 52 formed in the cover member 50. An absorbent 66 is accommodated in the plastic body 62, and a filter membrane 68 is attached to the bottom thereof. The diffusion channel 64 is used as a passage for air to make the air pressure inside the hard disk drive the same as the outside and to facilitate the discharge of moisture generated at the internal / external temperature difference, and the absorbent 66 is the diffusion channel 64. It absorbs pollutants in the air entering the hard disk drive or outgassing and moisture generated inside the hard disk drive.

In this function of the breather filter 60, the adsorption function of moisture and contaminants increases efficiency and durability according to the amount of the adsorbent 66 contained in the filter 60. The breather filter inside a constant size hard disk drive There is a limit to increasing the size of (60). That is, due to the limited space inside the hard disk drive, the size of the breather filter 60 cannot be increased any more. Therefore, the amount of the adsorbent 66 inside the breather filter 60 can also be limited, so that after absorbing moisture or contaminants to some extent, its function is degraded, which results in deteriorating the long-term reliability of the hard disk drive. . In addition, due to the small size of the breather filter 60, the area in contact with the air inside the hard disk drive is small, and there has been a limit in improving the adsorption function of moisture and contaminants.

Therefore, in order to improve the long-term reliability of the high-capacity, high-speed rotating hard disk drive, the amount of the adsorbent 66 inside the filter filter 60 may be increased or the performance of the adsorbent 66 itself may be adsorbed in a small volume. The amount of contaminants that can be increased should be increased. However, when the high-performance adsorbent 66 is used, the amount of contaminants that can be adsorbed increases, but the price of the adsorbent 66 itself increases, resulting in a high price of the hard disk drive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and in particular, to provide a disk damper of a hard disk drive having a function of reducing vibration of a rotating disk and a filtering function of adsorbing contaminants. have.

Disc damper of the hard disk drive according to the present invention for achieving the above technical problem,

In a disk damper of a hard disk drive disposed between a plurality of disks of the hard disk drive to reduce the vibration of the disk,

The disk damper is characterized in that the adsorption filter for adsorbing and filtering the contaminants inside the hard disk drive.

In the present invention, it is preferable that at least one filter mounting hole into which the adsorption filter is inserted is formed in the disk damper, and the adsorption filter inserted into the filter mounting hole is surrounded and supported by the disk damper.

In the present invention, the adsorption filter may include an adsorbent for adsorbing the contaminants, and a filter membrane covering the top and bottom surfaces of the adsorbent.

In the present invention, the adsorbent may be inserted into the filter mounting hole, and the edge portion of the filter membrane may be attached to the disk damper around the filter mounting hole.

In the present invention, the disc damper around the filter mounting hole may be formed with a stepped surface to which the filter membrane is attached. The depth of the stepped surface is preferably equal to the thickness of the filter membrane such that the surface of the filter membrane and the surface of the disk damper form the same plane.

Hereinafter, exemplary 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, FIG. 4 is an enlarged perspective view of the disk damper shown in FIG. 3, and FIG. 5 is FIG. 4. Vertical section of the disk damper along line A-A '

3 to 5, the hard disk drive includes a plurality of data storage disks 120a and 120b, a spindle motor 130 for rotating the disks 120a and 120b, and a read / write head. Actuator 140 is provided for moving the to a predetermined position on the disk (120a, 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 114 is inserted between the base member 111 and the cover member 112 to prevent dust or moisture from entering 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. On the contrary, when the hard disk drive is not operated, that is, 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 discs 120a and 120b are deviated from the data recording surface.

The hard disk drive includes a disk damper 150 according to the present invention 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 an adsorption filter 160 that adsorbs and removes contaminants such as moisture, particles, and out gas inside the hard disk drive.

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 151 protrude from the outer periphery of the disk damper 150. Each of the support protrusions 151 has a screw insertion hole 152 formed therein, and the disk damper 150 is inserted into the screw insertion hole 152 by a fixing screw 152 fastened to the base member 111. It is fixed with respect to the base member 111. 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 has a ring shape in which a portion including the operating range of the actuator 140 is opened.

In addition, the adsorption filter 160 is coupled to the disk damper 150 according to the present invention. Specifically, in the disk damper 150, two or three filter mounting holes 154 are formed in consideration of the deformability and rigidity of at least one, preferably the disk damper 150, and the filter mounting holes 154. Adsorption filter 160 is inserted into and coupled thereto. The adsorption filter 160 inserted into the filter mounting hole 154 is surrounded and supported by the disk damper 150.

The adsorption filter 160 may include an adsorption material 164 and a filter membrane 162 covering the top and bottom surfaces of the adsorption material 164. The adsorbent 164 is inserted into the filter mounting hole 154 to adsorb and filter contaminants such as moisture, outgas, and particles in the hard disk drive, and is commonly known as an adsorbent material, such as carbon powder. Can be made. The filter membrane 162 is fixed by attaching the edge portion thereof to the disk damper 150 around the filter mounting hole 154.

Adsorption filter 160 having the above-described configuration preferably has as much area as possible within the limit of maintaining the strength of the disk damper 150 as described above. In addition, the surface of the adsorption filter 160, that is, the outer surface of the filter membrane 162 may have the same plane as the surface of the disk damper 150 for the smooth flow of air. To this end, the disk damper 150 around the filter mounting hole 154 is preferably formed with a stepped surface 155 to which the filter membrane 162 is attached. In addition, the depth of the stepped surface 155 may be equal to the thickness of the filter membrane 162. In this case, the surface of the disk damper 150 and the surface of the filter membrane 162 may form the same plane.

As described above, the disk damper 150 according to the present invention, which is installed between the disks 120a and 120b, prevents turbulence of air between the disks 120a and 120b and is effective in damping the compressed air. With the basic function of damping the vibrations of the disks 120a and 120b, the additional function of adsorbing and removing contaminants such as moisture, particles, and outgas contained in the air flowing between the disks 120a and 120b. Has In particular, a larger amount of adsorbent 164 can be easily installed in the hard disk drive in addition to the conventional breather filter without requiring additional space, thereby improving long-term reliability of the hard disk drive. In addition, the adsorption filter 160 is installed between the disks 120a and 120b in which the air flows actively, thereby more effectively filtering the contaminants contained in the flow air.

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, the disk damper provided between the disks has an adsorption filter, which performs a unique function of damping disk vibration and an additional function of adsorbing and removing contaminants inside the hard disk drive. Done. Therefore, a larger amount of adsorbent can be used without additional space inside the hard disk drive, thereby improving long-term reliability of the hard disk drive.

Claims (6)

In a disk damper of a hard disk drive disposed between a plurality of disks of the hard disk drive to reduce the vibration of the disk, The disk damper is a disk damper of the hard disk drive, characterized in that the adsorption filter for adsorbing and filtering the contaminants inside the hard disk drive. The method of claim 1, At least one filter mounting hole into which the adsorption filter is inserted is formed in the disk damper, and the adsorption filter inserted into the filter mounting hole is surrounded and supported by the disk damper. . The method according to claim 1 or 2, The adsorption filter includes an adsorption material for adsorbing the contaminants, and a filter membrane covering an upper surface and a lower surface of the adsorption material. The method of claim 3, wherein The adsorbent is inserted into the filter mounting hole, and the edge portion of the filter membrane is attached to the disk damper around the filter mounting hole, the disk damper of the hard disk drive. The method of claim 4, wherein And a stepped surface to which the filter membrane is attached is formed in the disk damper around the filter mounting hole. The method of claim 5, And the depth of the stepped surface is equal to the thickness of the filter membrane such that the surface of the filter membrane and the surface of the disk damper form the same plane.

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