GB2308718A - Hard disk drive with a damper member inserted between the drive housing and spindle motor - Google Patents
Hard disk drive with a damper member inserted between the drive housing and spindle motor Download PDFInfo
- Publication number
- GB2308718A GB2308718A GB9626430A GB9626430A GB2308718A GB 2308718 A GB2308718 A GB 2308718A GB 9626430 A GB9626430 A GB 9626430A GB 9626430 A GB9626430 A GB 9626430A GB 2308718 A GB2308718 A GB 2308718A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disk drive
- hard disk
- spindle motor
- cover
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
- G11B19/2018—Incorporating means for passive damping of vibration, either in the turntable, motor or mounting
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
- G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Motor Or Generator Frames (AREA)
- Rotational Drive Of Disk (AREA)
Description
HARD DISK DRIVE is 2308718 13ackground of the Invention The present
invention relates to a hard disk drive, and more particularly, to a hard disk drive having an improved structure for.combining a base, a cover and a spindle motor.
Generally, the hard disk drive used as a secondary memory of a computer applies the theory of magnetic recording as is widely known and uses a disk coated with a magnetic material as the medium for recording data. Such a medium, for example, has a structure in which a plurality of disks are stacked into multiple-layers in a 3.5 inch hard disk drive to realize high capacity. In a disk havina such a multi-layered structure, the stability of the combination structure of the disks to the hard disk drive has a direct influence on the performance of recording/renroducing data.
FIGS. 1 through 3 schematically illustrate the external appearances according to the forms of combining a base frame with a cover in a conventional hard disk drive.
The structure shown in FIG. 1 is a structure in which a base frame 11 and a cover 12 are combined by latching four supporting points a, b, c, and d using four screws. Such a combination structure is mainly applied to a hard disk drive of low capacity since vibration is generated in driving the hard disk drive. Generally, a little vibration does not have a large effect on the is 2 generation of interference between adjacent data since the interval of data is flexibly recorded in the hard disk drive of low capacity.
However, as the hard disk drive is manufactured to have higher capacity, adjacent data interfere with each other with vibration since the intervals between data are smaller. To enhance the characteristics of reducing the vibration by improving such a problem, a structure is adopted in which two supporting points e and f or four supporting points e, f, g, and h are added to the previous four supporting points a, b, c, and d so as to combine a base frame 21 or 31 to a cover 22 or 32 as shown in FIGS. 2 and 3.
FIG. 4 is a bottom view schematically illustrating the inside of the hard disk drive cover 22 shown in FIG. 2. FIG. 5 is a sectional view taken along the V-V line of FIG. 4. FIG. 6 shows the attachment point 6, used to secure the spindle motor 13 to the cover 22 (not shown) using a screw 23 (not shown). FIG. 7 is a schematic nartial sectional view taken along the VII-VII line of FIG. 6.
The above combined structure has the effect of reducing vibration. However, this structure generates abrasion powders due to the friction between screw hole fi, formed in the spindle motor at the point f, and a screw 23 in assembling the spindle motor 13 and the cover 22 or while the screw is screwed on or off af ter 3 assembly.
Such abrasion Dowders have a harmful influence on the performance of the disk drive by falling on the disk. Also, the stability is deteriorated since the characteristic of the disk drive changes according to the change in torque and center during assembly of the disk drive.
Summary of the Invention
It is an object of the present invention to provide a hard disk drive having a stable combined structure of a base, a cover and a spindle motor.
Accordingly there is provided a hard disk drive for is recording/reproducing data according to a magnetic recording theory, comprising a disk combination body ",oaded an a spndle motor shaft combined with a base, an actuator assembly body combined with the base, and a cover combined with the base so as to house the spindle motor, the disk combination body, and the actuator assembly body, wherein the assembly body, having the form in which the cover is combined with the base, comprises a predetermined groove portion formed inside a portion of the cover, the upper surface of the spindle motor comprises a groove formed in a position corresponding to the groove portion with a damper member inserted between the groove porzion and the groove.
In the hard disk drive according to the present 4 invention, the assembly body is preferably constituted to maintain a gap of at least 0.2mm in the condition in which the cover is combined with the base. The groove portion preferably has a diameter of 3.5 to 4.5mm and a depth of 0.25 to 0.35mm. The groove preferably has a diameter of 3. 0 to 4.Omm and a depth of 0.25 to 0.35mm. Also, the damper member is preferably formed of rubber having a compression ratio of 30 to 50-i and having a columnar shape, i.e., cylindrical, rectangular block, etc., or a spherical-shape in one side of which a protruding portion which is inserted into the groove is provided. At least one contact surface of the damper member pre.Eerably has a double-sided tape.
Brief Description of the Drawiners
7-he above objects and advantages of the iDresent inven-,-on will become more apparent by describing in detail a mreferred embodiment thereof with reference to the attached drawings in which:
7I'GS. 1 through 3 schematically illustrate the combination s--ru--ture of a base frame and cover in a conventional hard disk drive; is a bottom view illustrating the cover of the conventional hard disk drive shown in FIG. 2; FIG. 5 is a sectional view taken along the V-V line in FIG. 4; FIG. 6 is a plan view illustrating the spindle motor combined with the cover in PIGS. 4 and 5; FIG. 7 is a partial sectional view taken along the VII-VII line in FIG. 6; FIG. 8 is a bottom view illustrating the cover of the hard disk drive according to the present invention; FIG. 9 is a sectional view taken along the IX-IX line in FIG. 8; FIG. 10 is a schematic plan view showing the spindle motor of the hard disk drive according to the present invention; FIG. 11 is a partial sectional view taken along the XI-M _Line in FIG. 10; FIG. 12 shows the combination structure of the hard disk drive according to the present invention; FIG. 13 is a perspective view showing the damper of FIG. 12; FIG. 14 shows the combination structure of the hard disk drive according to another embodiment of the present invention; and FIG. 1-5 is a perspective view showing the damper in FIG. 14.
Detailed DescriT)tion of the Invention Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Referring to FIGS. 8-12, a grooved portion 42a is is 6 formed in a supporting point f of a cover 42 which is combined with a base 11 (refer to FIG. 1), in the hard disk drive according to the present invention. A groove 43a is formed at the position corresponding to the grooved portion 42a, on the upper surface of a spindle motor 43 which is mounted on the base 11.
In such a structure, the hard disk drive according to the present invention is assembled by combining the cover 42 with the base 11 using a screw 23 (refer to FIG. 7) at other supporting points, i.e., a, b, c, d, and e of FIG. 2 or a, b, c, d, e, g, and h of FIG. 3, after inserting a damper member 50 in the groove 43a of the upper surface of the spindle motor 43 as shown and positioning the cover 42 so as to make the groove portion 42a corresDond to the groove 43a of the spindle motor 43. At this time, it is preferable that the damper member 50 s prevented from drifting away during assembly by having a double-sided tape on the contact surface between the damper member 50 and the groove 43a of the spindle motor 43, or the groove portion 42a of the cover 42.
Meanwhile, in the state in which the cover 42 and the base 11 are assembled, there exists a gap of at least 0.2mm between the lower surface of the cover 42 and the upper surface of the spindle motor 43 to prevent the cover 42 from contacting the spindle motor 43. To satisfy this, the damper member 50 is made of rubber having a columnar shape, i.e., a cylindrical or 7 rectangular block, and has a compression ratio of 30 to 5 0 -0k. In order to minimize vibration with high assembly precision, the groove portion 42a of the cover has a diameter of 3.5 to 4.5mm and a depth of 0. 25 to 0.35mm and the groove 43a of the spindle motor 43 has a diameter of 3 to 4mm and a depth of 0.25 to 0.35mm.
FIG. 14 shows the combination structure of the hard disk drive according to another embodiment of the present invention. According to this embodiment, a damper 501 is formed to have a spherical shape in one side of which a protruding portion 50al, which is inserted into the groove 43a, is provided as shown in FIG. 15. Accordingly, the damper 501 is compressed by the cover during assembly, thus the protruding portion 50al can be easily inserted into the groove 43a.
As described above, the hard disk drive according to the present invention has a structure in which the cover is combined with the base by inserting the damper member in the corresnonding grooves formed in the cover and the upper surface of -the spindle motor. Such a structure solves the problem caused by the abrasion powders generated by combining the screw in an assembly process in a conventional structure, thereby improving the assembly and performance of the disk drive.
8
Claims (11)
1. A hard disk drive, comprising:
base; spindle motor combined with said base; and cover combined with said base so as to house said spindle motor, wherein a grooved portion is formed inside a combination portion of said cover, a groove corresponding to the grooved portion of said cover is formed on the upper surface of said spindle motor, and said cover is combined with said base by inserting a damper member between said grooved portion and said spindle motor.
2. A hard disk drive as claimed in claim 1, wherein a gap of at least 0. 2mm exists between the lower surface of said cover and the upper surface of said spindle motor in the state in which said cover is combined with said base.
3. A hard disk drive as claimed in claim 1, wherein the grooved portion of said cover has a diameter of 3.5 to 4.5mm and a depth of 0.25 to 0. 35mm.
4. A hard disk drive as claimed in claim 1, wherein the groove of said spindle motor has a diameter of 3.0 to 4.Omm and a denth of 0.25 to 0. 35mm.
9
5. A hard disk drive as claimed in claim 1, wherein said damper member is made of rubber.
6. A hard disk drive as claimed in claim 1, wherein said damper member has a compression ratio of 30 to 50%.
7. A hard disk drive as claimed in claim 1, wherein said damper has a columnar shape.
is
8. A hard disk drive as claimed in claim 1, wherein said damper is formed to have a spherical shape in one side of which a protruding portion which is inserted into said groove is provided.
9. A hard disk drive as claimed in claim 1, wherein the contact surface of said damper member to said cover or said spindle motor has a double- sided tape attached thereto.
10. A hard disk drive, comprising a housing, comprised of first and second housing portions, a spindle motor mounted in said housing on said first housing portion and at least one vibration damping means, wherein said at least one vibration damping means is compressed between said spindle motor and said second housing portion.
11. A hard disk drive substantially as herein described with reference to Figs. 8 to 15.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950054736A KR970050883A (en) | 1995-12-22 | 1995-12-22 | Hard disk drive |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9626430D0 GB9626430D0 (en) | 1997-02-05 |
| GB2308718A true GB2308718A (en) | 1997-07-02 |
| GB2308718B GB2308718B (en) | 1999-11-17 |
Family
ID=19443294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9626430A Expired - Fee Related GB2308718B (en) | 1995-12-22 | 1996-12-19 | Hard disk drive |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR970050883A (en) |
| DE (1) | DE19652056A1 (en) |
| GB (1) | GB2308718B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100673156B1 (en) * | 1997-09-03 | 2007-07-09 | 삼성전자주식회사 | Hard disk drive |
| KR100462218B1 (en) * | 1997-09-03 | 2005-04-06 | 삼성전자주식회사 | How to secure spindle motor and actuator shaft in hard disk drive |
| KR100429842B1 (en) * | 2001-09-10 | 2004-05-03 | 삼성전자주식회사 | Hard disk drive having a damper for reducing vibration |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214549A (en) * | 1991-07-12 | 1993-05-25 | Seagate Technology, Inc. | Acoustically damped disc drive assembly |
| WO1996000964A1 (en) * | 1994-06-28 | 1996-01-11 | Quantum Corporation | Damping configuration for improved disk drive performance |
-
1995
- 1995-12-22 KR KR1019950054736A patent/KR970050883A/en not_active Application Discontinuation
-
1996
- 1996-12-13 DE DE19652056A patent/DE19652056A1/en not_active Ceased
- 1996-12-19 GB GB9626430A patent/GB2308718B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214549A (en) * | 1991-07-12 | 1993-05-25 | Seagate Technology, Inc. | Acoustically damped disc drive assembly |
| WO1996000964A1 (en) * | 1994-06-28 | 1996-01-11 | Quantum Corporation | Damping configuration for improved disk drive performance |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19652056A1 (en) | 1997-06-26 |
| KR970050883A (en) | 1997-07-29 |
| GB9626430D0 (en) | 1997-02-05 |
| GB2308718B (en) | 1999-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20091219 |