CN200990239Y - Vibration damping noise reducing magnetic disc driver - Google Patents
Vibration damping noise reducing magnetic disc driver Download PDFInfo
- Publication number
- CN200990239Y CN200990239Y CNU200620016188XU CN200620016188U CN200990239Y CN 200990239 Y CN200990239 Y CN 200990239Y CN U200620016188X U CNU200620016188X U CN U200620016188XU CN 200620016188 U CN200620016188 U CN 200620016188U CN 200990239 Y CN200990239 Y CN 200990239Y
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- arc
- loam cake
- vibration
- noise
- disc driver
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Abstract
The utility model relates to a vibration reducing and noise lowering disk drive, which comprises a base and an upper lid covering the base. The upper lid is provided with arc bosses and arc grooves in an interval manner, both of which are coaxially arc or ellipse arc shaped and are arranged along the radial direction; the arc bosses and arc grooves together form a scalloped wave shape, thereby increasing strength of the upper lid structural, avoiding resonant vibration of the upper lid caused by a motor and reducing disk drive noise at work.
Description
[technical field]
The utility model relates to a kind of vibration-damping noise-reducing disk drive, specifically relates to a kind of structural modal that changes and reduces to vibrate disc driver with noise.
[background technology]
Continuous progress along with computer technology, from then on disc driver has also opened new development chapter, it is as the core that has become computer memory system based on the combination of magnetic head, storage medium, control circuit, CD-ROM drive motor, and volume constantly dwindles, capacity constantly increases, and Performance And Reliability also constantly is improved.The disc driver noiseproof feature becomes the reference that the consumer selects disc driver thereupon.
CD-ROM drive motor comprises Spindle Motor and voice coil motor.The noise of disk mainly comes from voice coil motor that drives head stack and the Spindle Motor that drives disc sheet, and increasing also of disc can increase noise simultaneously.What early stage Spindle Motor adopted is ball bearing, along with improving constantly of disk running speed, has brought series of negative influences such as wearing and tearing aggravation, temperature rising, noise increase.Traditional disk drive structure comprises a disk base and the loam cake by the abundant sealed base of screw, in the space that described voice coil motor and Spindle Motor all are housed in base and loam cake and are surrounded.Spindle Motor is fixed on the base, and the vibration that its high speed rotating produces passes to loam cake by the surface of contact between screw or loam cake and the base.And the head stack that voice coil motor drives is installed in the fixing rotating shaft in two ends, described rotating shaft one end is fixed on the base, the other end then covers last by the screw locking, when not stall under the driving of head stack at voice coil motor is moving, the vibration that head stack produces also can be got on by the loam cake that rotating shaft is delivered to strength of materials weakness, make that the suffered vibration source of loam cake is more, vibrate bigger.The noise of disk is that the rotating speed with disk is directly proportional: class of the every raising of rotating speed, sound level will correspondingly improve.Along with the raising of disk running speed, the solution of noise problem is extremely urgent.In the face of the disc driver noise problem, improvement is all constantly being done by each disk manufacturer, have from adopting novel disc drive spindle motor to start with, what have is point of penetration with the encapsulating structure that improves disc driver then, the seeking speed of then utilizing the software adjustment disk that has is started with.Aforementioned noise-reduction method is more complicated all, and cost is also than higher.Please refer to Fig. 1, it shown in the figure a kind of denoising structure of traditional disk drives, it installs sound insulation sheet 20 ' additional and is used for further stoping the diffusion of internal vibration on top cover 10 ', but this kind denoising structure need be installed in sound insulation sheet 20 ' on the top cover 10 ', not only do not need extra web member, antivibration absorbing to web member simultaneously also has corresponding requirements, described denoising structure relative complex, and increase sound insulation sheet 20 ' separately and must increase cost.
[summary of the invention]
The purpose of this utility model is to propose a kind of structural modal that changes to reduce to vibrate disc driver with noise.
The technical scheme that realizes above-mentioned purpose is a kind of vibration-damping noise-reducing disk drive, comprises a base and is fastened on the loam cake of base.Cover on described and be arranged at intervals with arc-shaped protrusions and arc groove.Described arc-shaped protrusions and arc groove are concentric circular-arc or oval arcuation, along continuous distribution radially.Described arc-shaped protrusions and arc groove constitute corrugated fluctuating shape.
The utility model adopts technique scheme, its beneficial technical effects is: 1) the utility model vibration-damping noise-reducing disk drive is by being provided with arc-shaped protrusions and arc groove, strengthen the strength of materials of loam cake, improve the natural frequency of the corresponding mode of loam cake, thereby the vibration that reduces loam cake avoids loam cake under CD-ROM drive motor vibration exciting resonance phenomena to take place simultaneously, has reduced the noise that disc driver produces.2) the utility model vibration-damping noise-reducing disk drive is simple in structure.
[description of drawings]
Below by embodiment also in conjunction with the accompanying drawings, the utility model is described in further detail:
Fig. 1 is the vibration and noise reducing structural drawing of traditional disk drives.
Fig. 2 is the three-dimensional exploded view of the utility model vibration-damping noise-reducing disk drive.
Fig. 3 is the utility model vibration-damping noise-reducing disk drive first embodiment structural representation.
Fig. 4 is the partial sectional view of the utility model vibration-damping noise-reducing disk drive along A-A line among Fig. 3.
Fig. 5 is the second embodiment structural representation of the utility model vibration-damping noise-reducing disk drive.
Fig. 6 is the partial sectional view of the utility model vibration-damping noise-reducing disk drive along B-B line among Fig. 5.
[embodiment]
Please refer to Fig. 2, a kind of vibration-damping noise-reducing disk drive by changing the structural modal of loam cake, improves the natural frequency of the corresponding mode of loam cake, strengthens the strength of materials of loam cake, reduces the noise that disc driver produces.Described vibration-damping noise-reducing disk drive comprise a base 70, one and base 70 fully the loam cakes 10, the disk 30 of some storage data, the head stack 40 and of the some magnetic heads 46 that read and write data of carrying of sealing are installed in the control circuit board of base 70 belows.
Form a seal cavity between described base 70 and loam cake 10, described seal cavity is accommodated the head stack 40 of the disk 30 of storage data, the magnetic head 46 that reads and writes data and carrying magnetic head 46.In the present embodiment, disc driver has two disks 30, and each disk 30 is coated with magnetic medium.Described base 70 also is equipped with the contact maker (indicating) of a binding control circuit board 11, and described colligator transmits the data-signal of magnetic head read-write in the seal cavity.
Described base 70 depressions one disk space, a motor 72 is installed at described disk space center, and described motor 72 has a stator and a propeller boss (figure does not show).Described stator twines some solenoids, and described propeller boss is provided with a magnetosphere around the coil of stator.The energising solenoid of the magnetosphere induction stator of described propeller boss also drives described propeller boss high speed rotating.Described two disks 30 are installed on the propeller boss of Spindle Motor 72, and are spaced apart by a packing ring between two disks 30.Disk 30 tops, top are installed a compressing tablet 32 by screw at motor 72 propeller boss, and described compressing tablet 32 under the effect of screw deformation takes place, and produce deformation force disk 30 is fixed, thereby guarantee that deformation does not take place disk 30 cards.
Described head stack 40 rotates (figure does not show) on the stationary shaft that is fixed on base 70 by bearing, in the present embodiment, described head stack 40 comprises the magnetic induction coil 42 that is installed in head stack 40 afterbodys and is used for hanging the cantilever 44 of described magnetic head 46.Described coil 42 is between magnetic patch on one 52 and following magnetic patch 50, and the coil 42 of energising is rotated by long-range navigation taste power in magnetic field to drive cantilever 44 simultaneously to rotate, thereby cue head 46 is finished and sought rail.After magnetic head 46 reads signal, pass the signal to a nearest signal amplification circuit that is installed in head stack 40, the signal that reads is amplified.Amplifying signal is sent to the control circuit board that is installed in base 70 belows by a flexible circuit board, is handled by control circuit board.Described head stack 40 1 sides also are provided with a head stack locking device 60.When disc driver is vibrated or impacts, the cantilever 44 of the head stack 40 that is supported by stationary shaft can swing, and causes magnetic head 46 and data in magnetic disk to sustain damage.At this moment, described head stack locking device 60 is used for blocking head stack 40 and is vibrated the rotation that meets accident to prevent it.
Please refer to Fig. 3 to Fig. 6, described loam cake 10 top depression form a mode district 12, described mode district 12 roughly is circular, seeks under the prerequisite of rail not influencing disk driver interior head stack 40, increases the area in mode district in the finite space of loam cake as much as possible.Described loam cake 10 is also further offered a fixed orifice 14, and described fixed orifice 14 is used for the stationary shaft two ends of rotation support head stack 40 are fixed.
The structure of loam cake 10 has some kinds in the disc driver of the present utility model, each loam cake 10 all have separately mode and different intrinsic frequencies, when loam cake 10 during by exciting, resonance takes place easily produces noise.If the natural frequency of disc driver loam cake 10 mode is high more, show that loam cake 10 structures are firm more, then the amplitude of loam cake 10 vibrations is more little, so it is more little to promote the noise of air generation, that is quiet more.If the natural frequency of disc driver loam cake 10 mode is low more, show that loam cake 10 structures are pliable and tough more, then the amplitude of loam cake 10 vibrations is big more, so it is big more to promote the noise of air generation, that is noise is big more.The loam cake of traditional disk drives is carried out mode experiment the analysis showed that the natural frequency of traditional loam cake is 494Hz, can not satisfy the demand of noise reduction far away.The natural frequency of disc driver top cover is directly proportional with the rigidity of top cover, is inversely proportional to the weight of top cover.Under the prerequisite that does not increase disc driver weight, improve the natural frequency of disc driver loam cake 10, become technical problem to be solved in the utility model.
As first embodiment of the present utility model, described loam cake 10 top depression form a circular-arc mode district 121, be provided with the arc-shaped protrusions 161 and arc groove 181 of some fluctuatings in the described mode district 121, described arc-shaped protrusions 161 and groove 181 are the center with a together circle center in circular-arc mode district 121, be concentric circular-arc or oval arcuation, and along continuous distribution radially.Described arc-shaped protrusions 161 and arc groove 181 constitute corrugated fluctuating shape.Disc driver loam cake in the utility model first embodiment 10 is carried out mode experiment, test findings shows, the loam cake natural frequency of the utility model disc driver is 1039Hz, increased the structural strength of loam cake 10, avoid the vibration generation resonance of loam cake 10, the noise that has produced when fully having reduced disc driver work along with various motors.
As second embodiment of the present utility model, when described concentric along continuous distribution radially circular arc or the projection of ellipse arc with the radius of groove infinitely-great the time, the possible parallel distribution of the projection of described circular arc or ellipse arc and groove.Specifically see also Fig. 5 to Fig. 6, described loam cake 10 top depression form the mode district 122 of a given shape, are provided with some projections 162 and groove 182 that are the fluctuating of wavy distribution in the described mode district 122.Described projection 162 and groove 182 be wavy in mode district 122 cross direction profiles.Disc driver loam cake in the utility model second embodiment 10 is carried out mode experiment, test findings shows, the loam cake natural frequency of the utility model disc driver is 689Hz, increased the structural strength of loam cake 10, be enough to avoid the vibration generation resonance of loam cake 10, the noise that produces when reducing disc driver work along with various motors.
In disk when work,, Spindle Motor 72 and the head stack 40 of seeking rail be high-speed rotation all.Spindle Motor 72 is because be fixed on the base 70, and the vibration that its high speed rotating produces passes to loam cake 10 by the surface of contact between screw or loam cake 10 and the base 72.Because the effect of mode district 121,122 structures makes the natural frequency of loam cake 10 increase.Produce noise though the outside environment that has exciting, loam cake 10 are difficult for that also resonance takes place, thereby reduced the noise that produces when disc driver is worked.
Please refer to Fig. 1, the utility model relates to a kind of vibration of disc driver and method of noise of reducing simultaneously, and described method is provided with some arc-shaped protrusions 161 and arc groove 181 at interval last covering.Described arc-shaped protrusions 161 and arc groove 181 are concentric circular-arc or oval arcuation, along continuous distribution radially.Described arc-shaped protrusions 161 and arc groove 181 constitute corrugated fluctuating shape.
Claims (3)
1, a kind of vibration-damping noise-reducing disk drive comprises a base and is fastened on the loam cake of base, it is characterized in that: cover on described and be arranged at intervals with arc-shaped protrusions and arc groove.
2, vibration-damping noise-reducing disk drive according to claim 1 is characterized in that: described arc-shaped protrusions and arc groove are concentric circular-arc or oval arcuation, along continuous distribution radially.
3, vibration-damping noise-reducing disk drive according to claim 1 and 2 is characterized in that: described arc-shaped protrusions and arc groove constitute corrugated fluctuating shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620016188XU CN200990239Y (en) | 2006-12-01 | 2006-12-01 | Vibration damping noise reducing magnetic disc driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620016188XU CN200990239Y (en) | 2006-12-01 | 2006-12-01 | Vibration damping noise reducing magnetic disc driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200990239Y true CN200990239Y (en) | 2007-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620016188XU Expired - Fee Related CN200990239Y (en) | 2006-12-01 | 2006-12-01 | Vibration damping noise reducing magnetic disc driver |
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| Country | Link |
|---|---|
| CN (1) | CN200990239Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187072A (en) * | 2011-12-29 | 2013-07-03 | 新科实业有限公司 | Vibration-proof method for magnetic head and cantilever combination |
-
2006
- 2006-12-01 CN CNU200620016188XU patent/CN200990239Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187072A (en) * | 2011-12-29 | 2013-07-03 | 新科实业有限公司 | Vibration-proof method for magnetic head and cantilever combination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071212 Termination date: 20131201 |