CN1427405A - Disk clamping mechanism - Google Patents
Disk clamping mechanism Download PDFInfo
- Publication number
- CN1427405A CN1427405A CN02157161A CN02157161A CN1427405A CN 1427405 A CN1427405 A CN 1427405A CN 02157161 A CN02157161 A CN 02157161A CN 02157161 A CN02157161 A CN 02157161A CN 1427405 A CN1427405 A CN 1427405A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- spring
- binding clasp
- clamping mechanism
- turntable
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/0284—Positioning or locking of single discs of discs rotating during transducing operation by clampers
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
To provide a disk clamping mechanism which strongly holds a disk on a turntable by a nearly similar and stable holding force even if fluctuation occurs in a thickness dimension of the disk, has a pressing force to prevent the floating of the disk itself even during high-speed rotation, has a small magnetic noise, and deals with a thin motor. A turntable 4 is secured to the end of a rotary shaft 3 of a spindle motor 2 fixed to a motor fixing angle 1 of a recording/reproducing device. A clamper is supported in a suspended state by a support angle 6 of the recording/reproducing device so as to be coaxial to the axis of the rotary shaft 3 by a gap A with the end of the rotary shaft 3 of the spindle motor 2. The support angle 6 is made of a magnetic metal material such as an iron plate, its hole part 6a for inserting the clamper is constituted of a burring, and a ring-shaped magnet 7 having a thickness dimension smaller than the burring height dimension B is secured to its outer periphery 6b by pressure insertion, adhesion, or the like.
Description
Technical field
The present invention relates to especially used dish clamping (Network ラ Application プ) mechanisms such as recording/displaying device of CD of disc record media.
Background technology
Past, utilize the recording/displaying device of CD, turntable is fixed on the axle of the Spindle Motor that this device has, CD is placed on makes its rotation on this turntable, on CD, write or sense information.
But, be placed on the CD on the turntable if center of gravity deviation or warpage etc. in the small face are arranged, then since in recent years CD under high speed rotating, use, so because action of centrifugal force, CD is mobile a little on turntable, will produce the rotation center skew, perhaps CD itself produces come-up, thereby the generation fault makes the video disc recording magnetic track in optical pickup (sensor) the disengaging rotation, can not read or recorded information again.
In the past, at the skew of the rotation center of above-mentioned CD own, the measure of taking is in rotary course CD to be securely fixed on the placed side of turntable all the time.Its method is at the turntable central portion circular recess to be set, in this recess, have circular magnet, utilize the magnetic of above-mentioned magnet to attract to constitute and binding clasp under the supporting angle steel suspention of this recording/displaying device by magnetic sheet metals such as iron plates, the CD of laying is carried out clamping, like this CD is securely fixed on the CD placed side direction of turntable.
And, come-up at the above-mentioned CD of another side itself, the measure of taking is: rotor-side or stator side at Spindle Motor are installed attraction magnet, in stator side or rotor-side magnetic is installed, is utilized magnetic attraction to prevent that the rotor portions that the turntable of having laid CD is fixed is upwards unsteady from stator department when rotated by gap and opposite.
Yet, the method that prevents of the CD rotation center skew in above-mentioned past, the problem of existence is: when laying thicker CD, the ringshaped magnet of this CD of clamping and the magnetic attraction of binding clasp can significantly reduce, and the rotation center of CD still can be offset.
The method for making of previous CD is: the system disk stamper of making according to former dish is installed on the make-up machine, utilizes ester moulding technology such as acrylic resin to make transparent compact disc substrate.
Then, this compact disc substrate through aluminium mirror coating evaporation operation and diaphragm working procedure of coating, is represented by stickup or Print Label at last, makes CD.But, because produce in a large number, so each processing dimension unavoidably can produce error through these manufacturing processes.Especially the important parameter gauge of CD is according to JIS (Japanese Industrial Standards) specification, for example, CD-ROM is 1.20mm with the thickness specification of CD, allowable tolerance is+0.3mm/-0.1mm, and DVD is 1.20mm with the thickness specification of CD, and allowable tolerance is+0.3mm/-0.06mm.
Press the gauge of the CD of above-mentioned fabrication process, be controlled at the CD of JIS critical field, also have to make this CD is carried out the situation that the magnetic attraction holding force of the circular magnet of clamping and binding clasp changes significantly with the thickness of the thickness of interior higher limit and lower limit.This is because the magnetic pole acting force in the Coulomb law, square being inversely proportional to of its attenuation characteristic and distance.Under the situation of the above-mentioned magnetic attraction of this characteristic local setting jumpy mechanism, produce the remarkable offset problem of CD rotation center.
On the other hand, the method that prevents of above-mentioned CD come-up, the problem of existence is: attract the number of spare parts of magnet and magnetic to increase, assembling work amount thereupon also increases.
And the problem that this design of part exists is: the structure of Spindle Motor itself increases, and can not adapt to the trend of market demands slimming.
Moreover, yet have such problem, promptly outside circular magnet owing to increased attraction magnet, so leakage flux also increases, the magnetic noise increases.
Summary of the invention
Therefore, the present invention provides a kind of disc clamping mechanism for addressing the above problem, it makes can not cause rotation center skew yet when the disk thickness dimensional variations, and CD can not float yet when high speed rotating, and the magnetic noise is few and be applicable to thin motor.
In order to address the above problem, disc clamping mechanism of the present invention, it has the turntable on the turning axle that is fixed on Spindle Motor, and by the binding clasp of supporting angle steel supporting, utilize this turntable and binding clasp to come chucking optical disk, it is characterized in that: above-mentioned binding clasp comprises the binding clasp main body of the above-mentioned CD of flexibly clamping that is positioned at the turntable opposite and comprises the compressing member of magnetic metal portion, and, above-mentioned supporting angle steel comprises magnetic metal portion, above-mentioned pressed component and with the position of the opposed supporting angle steel of this pressed component on have the magnetic attraction device, when above-mentioned CD tightens, the elastic force of above-mentioned binding clasp overcomes the magnetic attracting force of this magnetic attraction device, and thus above-mentioned CD is pressed on the above-mentioned turntable, above-mentioned CD is clamped.
And, disc clamping mechanism of the present invention, it is characterized in that: above-mentioned turning axle is arranged on the rotor portions, this rotor portions is mutually opposed with the stator department of Spindle Motor, it reserves the gap each other on axis direction, when above-mentioned CD chucking, the elastic force by above-mentioned binding clasp is pressed on said stator portion to above-mentioned rotor portions.
And, disc clamping mechanism of the present invention, the magnet that its magnetic attraction device adopts be fixed on form on the above-mentioned supporting angle steel circular, or be fixed on the above-mentioned pressing member and form circularly, and above-mentioned spring member is formed by volute spring or leaf spring, when above-mentioned turntable is put and is clamped above-mentioned CD, above-mentioned magnetic attraction device becomes noncontact and attracts state, comes the setting spring constant according to this state, can obtain above-mentioned disc clamping mechanism.
Description of drawings
Fig. 1 is the pith cross sectional illustration figure before the CD in the expression embodiment of the present invention is laid.
Fig. 2 is the local pith cross sectional illustration figure that amplifies of content shown in Figure 1.
Fig. 3 is the pith cross sectional illustration figure of CD when laying of expression embodiment of the present invention.
Fig. 4 is the local pith cross sectional illustration figure that amplifies of content shown in Figure 3.
Fig. 5 relates to the CD clamping behavioral illustrations figure of disc clamping mechanism of the present invention and old-fashioned disc clamping mechanism.
Fig. 6 is the oblique view that expression relates to the distortion of binding clasp main body of the present invention.
Fig. 7 is the pith cross sectional illustration figure of the distortion of expression embodiment of the present invention.
Fig. 8 is the local pith cross sectional illustration figure that amplifies of content shown in Figure 7.
Embodiment
Below with reference to the accompanying drawings, describe embodiments of the present invention in detail.
Fig. 1 is major part cross sectional illustration figure, the state of disc clamping mechanism before being about to clamp CD of its expression embodiments of the present invention.Fig. 2 is the sectional view that further amplifies major part illustrated in fig. 1.Be fixed at Fig. 1 and Fig. 2 intermediate station 4 on the end of turning axle 3 of Spindle Motor 2, this Spindle Motor 2 is fixed on the motor angle steel (ア Application グ Le) 1 of recording/displaying device.And motor angle steel 1 utilizes the not shown mechanism that goes out to be installed on the recording/displaying device, and keeps the state that can move on the axis direction of turning axle 3.And, the 6 pairs of binding clasps of supporting angle steel that are fixed on the recording/displaying device support and make it to be suspended state, and, and between the end of included turning axle 3 a gap A is arranged in the opposed rotor portions of the stator department of Spindle Motor 2 with the axis coaxle of turning axle 3.
This supporting angle steel 6 is fixed on the recording/displaying device, constitute by magnetic metal materials such as iron plates, the 6a of hole portion that this binding clasp passes forms by plunging, on its periphery 6b, utilize and be pressed into or method such as bonding has installed and fixed circular magnet 7, the gauge of this magnet 7 has magnetic less than plunging height dimension B on the axis direction of turning axle 3.And supporting angle steel 6 also can wait by magnetic material magnet 7 is installed as nonmagnetic substance.So, can suitably select required separately material behavior.
And in Fig. 2, the 4a of turntable 4 is the hemisphere shape lug bosses of usefulness of centering when laying CD 11, and 4b is an anti-slip component of laying CD 11.
And binding clasp is made of binding clasp main body 5, spring compression spare 8, volute spring 9 and retainer 10.And binding clasp main body 5 is made by discoid rubber-like resin etc.Above-mentioned spring compression spare 8 is made by magnetic metal materials such as iron plates, and it is enclosed within on the peripheral part 5a of end of binding clasp main body 5, and its outer diameter part is greater than the diameter of the periphery 6b of the plunging (バ-リ Application グ) of supporting angle steel 6.At this spring compression spare 8 and for it is pulled out the retainer 10 on the end that is fixed on binding clasp 5 on anti-, like this between the convex surface 5c of the opposition side of the CD press surface 5b of spring compression spare of Gou Chenging 8 and binding clasp main body 5, a kind of compression volute spring 9 is set, the internal diameter of this volute spring 9 is greater than the periphery footpath 5a of portion of binding clasp main body 5, and external diameter is less than the diameter of the 6a of hole portion of supporting angle steel 6.
Do not clamping under this state of CD, the plunging end face 6c of supporting angle steel 6 contacts with spring compression spare 8 all the time, and the press surface 5b of binding clasp 5 is flexible on axis direction.And, the gauge of magnet 7 is set at plunging height dimension B less than supporting angle steel 6, the gap of the end 6c of the plunging of spring compression spare 8 and supporting angle steel 6 is set at setting, its magnetic attraction intensity of force is adjusted.Needs are adjusted this magnetic attraction, also can adopt another kind of method, the plunging height dimension B that is supporting angle steel 6 is set in below the gauge of magnet 7, adjusts its gauge for non magnetic that installation approaches on the magnet 7 that attracts spring compression spare 8.
Fig. 3 is pith cross sectional illustration figure, the state of the disc clamping mechanism chucking optical disk of its expression embodiment of the present invention.Fig. 4 is pith cross sectional illustration figure, and it has further amplified pith illustrated in fig. 3.If turntable 4 is near to binding clasp main body 5 side joints from the state of above-mentioned Fig. 1, and then turntable 4 is laid CD 11, so the press surface 5b of binding clasp main body 5 begins to contact turntable 11, then, volute spring 9 begins compression, and binding clasp main body 5 begins to push and turntable 4 carries out clamping to CD 11 together.
Moreover if turntable 4 moves to assigned position, then as shown in Figure 3 and Figure 4, binding clasp main body 5 powerful compression helical springs 9 compress the CD 11 that is placed on the turntable 4, and 5 pairs of CDs of turntable 4 and binding clasp main body 11 carry out clamping and fixing.And at this moment, the spring constant of the magnetic force of magnet 7 and volute spring 9 is configured to the end face 6c of plunging of supporting angle steel 6 and the magnetic attraction portion of spring member 8 keeps contactless state, has clearance C.
Under the state of the above-mentioned CD 11 of clamping, between the end face 6c of the plunging of spring compression spare 8 and supporting angle steel 6 clearance C is arranged, can be rotated, the attractive force that is magnetic between end face 6c and magnet 7 and spring compression spare 8 interacts, so, turntable 4 and binding clasp main body 5 clamp CD 11 securely, and binding clasp main body 5 is by CD 11 and turntable 4, the direction of the rotor portions that comprises turning axle 3 to the motor angle steel 1 of this device compressed, so the rotor portions of laying CD when high speed rotating can upwards not floated from stator department yet.
Fig. 5 is the figure that is held characteristic that expression is clamped in the CD 11 between turntable 4 and the binding clasp.The thickness of X coordinate representation CD in Fig. 5, the power that is held of Y coordinate representation CD.And D represents the characteristic of disc clamping mechanism of the magnetic attraction of existing mode, and E represents to relate to disc clamping mechanism characteristic of the present invention.The characteristic D of existing structure has the characteristic of die-away curve, though the thickness of CD 11 in the JIS critical field, the power that is held of this CD also can produce great variety (f2-f1) from t1 to t2 the time.
Compare with it, relate to the end face 6c of plunging of supporting angle steel 6 of disc clamping mechanism of the present invention and the magnetic attraction that magnet 7 acts on spring compression spare 8, utilize the part of its clamping stability of characteristics, promptly this disk thickness changes 0.4mm (in the allowed band of JIS standard thickness size) and the still indeclinable part of characteristic approximately, so, thickness by the CD 11 of turntable 4 and binding clasp 5 clampings changes, and its clamping characteristic is resembled keep near straightened condition the family curve E.
For example, the thickness of CD 11 when t1 is changed to t2, because volute spring 9 further is compressed, so the deflection of spring increases (t2-t1), increases the pressing force to CD 11 as previously mentioned.Because the effect of this part strength that increases, be subjected to the spring compression spare 8 of the magnetic attraction effect of the end face 6c of plunging of supporting angle steel 6 and magnet 7, because have said structure, so its position is pressed against the place of leaving (t2-t1) again.This that is to say, above-mentioned clearance C increases (t2-t1) approximately, its result, the increase compression section (t2-t1) of above-mentioned volute spring 9 is overcome, the deflection of volute spring 9) almost do not change, the pressing force that binding clasp produces when the thickness of this CD 11 is t1 and t2 remains unchanged, and the suffered holding force of this CD of meanwhile being held 11 is almost constant.
And under this state, the front end of turning axle 3 joltily is not inserted in the pilot hole 5d of binding clasp main body 5, so the rotation center of turntable 4 and CD 11 binding clasp B in rotary course itself does not produce skew.
And circular magnet 7 and supporting angle steel 6 and spring compression spare 8 etc. are assembled in parallel surface, so, be clamped on the turntable 4 CD 11 all the time with the corresponding relation of light picker keeping parallelism.
And, push the spring member of binding clasp main body 5 except with the volute spring, also can use leaf spring.
Fig. 6 relates to the distortion of binding clasp of the present invention, is the oblique view of representing binding clasp main body 5 from CD press section 5b side.The press section 5b of binding clasp main body 5 is divided into a plurality of fraction 5f and most of 5g by the 5h of joint-cutting portion in Fig. 6.In this structure, when pushing the CD 11 of placement, each partitioning portion of binding clasp main body 5 can contact CD 11 separately, so binding clasp can only one-sidedly not pushed the CD 11 of placement, and the whole circumference that can push CD.
Fig. 7 is the pith sectional view, the disc clamping mechanism of its expression embodiment of the present invention distortion.Fig. 8 is the pith cross sectional illustration figure that pith to Fig. 7 has further amplified.This structure is identical with Fig. 1 basically, and different places is interior all sides that the magnet 17 of pushing CD 11 is fixed on circular spring compression spare 18.Its function is identical with above-mentioned functions, but advantage is the size that can reduce to push the magnet 17 of CD 11.
And, also can obtain to utilize flywheel (the Off ラ イ ホ-Le) effect of magnet 17 inertia.
The effect of invention
As mentioned above, relate to disc clamping mechanism of the present invention if adopt, then pressing from both sides with binding clasp During tight CD, utilize the elastic force of above-mentioned binding clasp to overcome the magnetic attraction of magnetic attraction device Power can be pressed into above-mentioned CD on the turntable above-mentioned CD is clamped, and, clamp above-mentioned During CD, can be pressed into rotor portions in the stator department, the disk thickness change in size can not make yet revolves Turn to off-centring, and, CD is not upwards floated.
And, need to not arrange at the central portion of turntable circular magnet and rotor and stator it Between arrange and attract with magnet etc., so leakage magnetic flux reduces, the magnetic noise reduces, and can realize comprising Motor is in interior slimming.
Claims (12)
1, a kind of disc clamping mechanism, it has the turntable on the turning axle that is fixed on Spindle Motor, and by the binding clasp of supporting angle steel supporting, utilize this turntable and binding clasp to come chucking optical disk, it is characterized in that: above-mentioned binding clasp comprises the binding clasp main body of the above-mentioned CD of flexibly clamping that is positioned at the turntable opposite and comprises the compressing member of magnetic metal portion, and, above-mentioned supporting angle steel comprises magnetic metal portion, above-mentioned pressed component and with the position of the opposed supporting angle steel of this pressed component on have the magnetic attraction device, when above-mentioned CD tightens, the elastic force of above-mentioned binding clasp overcomes the magnetic attracting force of this magnetic attraction device, above-mentioned CD is pressed on the above-mentioned turntable, to clamp above-mentioned CD.
2, disc clamping mechanism as claimed in claim 1, it is characterized in that: above-mentioned turning axle is arranged on the rotor portions, this rotor portions is mutually opposed with the stator department of Spindle Motor, it reserves the gap each other on axis direction, when above-mentioned CD chucking, the elastic force by above-mentioned binding clasp is pressed on said stator portion to above-mentioned rotor portions.
3, disc clamping mechanism as claimed in claim 1, it is characterized in that: above-mentioned magnetic attraction device is to give as security tight member or above-mentioned supporting angle steel, this pressed component comprises circular magnet and the magnetic metal portion that is fixed on the above-mentioned supporting angle steel, and this above-mentioned supporting angle steel comprises circular magnet and the magnetic metal portion that is fixed on the above-mentioned pressed component.
4, disc clamping mechanism as claimed in claim 1, it is characterized in that: above-mentioned magnetic attraction device is to give as security tight member or above-mentioned supporting angle steel, this pressed component comprises circular magnet and the magnetic metal portion that is fixed on the above-mentioned supporting angle steel, and this above-mentioned supporting angle steel comprises circular magnet and the magnetic metal portion that is fixed on the above-mentioned pressed component.
5, disc clamping mechanism as claimed in claim 1 is characterized in that: above-mentioned compactor comprises above-mentioned binding clasp main body, gives as security tight parts and expand these binding clasp main bodys and spring is given as security the spring member of tight parts as the spring that contains the tight parts of signature of magnetic metal portion.
6, disc clamping mechanism as claimed in claim 2 is characterized in that: above-mentioned compactor comprises above-mentioned binding clasp main body, gives as security tight parts and expand these binding clasp main bodys and spring is given as security the spring member of tight parts as the spring that contains the tight parts of signature of magnetic metal portion.
7, disc clamping mechanism as claimed in claim 3 is characterized in that: above-mentioned compactor comprises above-mentioned binding clasp main body, gives as security tight parts and expand these binding clasp main bodys and spring is given as security the spring member of tight parts as the spring that contains the tight parts of signature of magnetic metal portion.
8, disc clamping mechanism as claimed in claim 4 is characterized in that: above-mentioned compactor comprises above-mentioned binding clasp main body, gives as security tight parts and expand these binding clasp main bodys and spring is given as security the spring member of tight parts as the spring that contains the tight parts of signature of magnetic metal portion.
9, disc clamping mechanism as claimed in claim 5, it is characterized in that: above-mentioned spring member is made of volute spring or leaf spring, and its spring constant is set at: above-mentioned magnetic attraction device is in noncontact and attracts state when laying on the above-mentioned turntable and clamping above-mentioned CD.
10, disc clamping mechanism as claimed in claim 6, it is characterized in that: above-mentioned spring member is made of volute spring or leaf spring, its spring constant is set at: when laying on the above-mentioned turntable and clamping above-mentioned CD, above-mentioned magnetic attraction device is in noncontact and attracts state.
11, disc clamping mechanism as claimed in claim 7, it is characterized in that: above-mentioned spring member is made of volute spring or leaf spring, its spring constant is set at: when laying on the above-mentioned turntable and clamping above-mentioned CD, above-mentioned magnetic attraction device is in noncontact and attracts state.
12, disc clamping mechanism as claimed in claim 8, it is characterized in that: above-mentioned spring member is made of volute spring or leaf spring, its spring constant is set at: when laying on the above-mentioned turntable and clamping above-mentioned CD, above-mentioned magnetic attraction device is in noncontact and attracts state.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001382493 | 2001-12-17 | ||
| JP2001382493A JP3751558B2 (en) | 2001-12-17 | 2001-12-17 | Disc clamp mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1427405A true CN1427405A (en) | 2003-07-02 |
Family
ID=19187490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02157161A Pending CN1427405A (en) | 2001-12-17 | 2002-12-17 | Disk clamping mechanism |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3751558B2 (en) |
| KR (1) | KR20030051203A (en) |
| CN (1) | CN1427405A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100336654C (en) * | 2005-04-15 | 2007-09-12 | 罗铁威 | Vacuum magnetically controlled bonding method and apparatus for high-density optical disc production |
| US7802270B2 (en) | 2006-01-16 | 2010-09-21 | Fujitsu Ten Limited | Disk reproducing apparatus |
| CN102248746A (en) * | 2010-05-21 | 2011-11-23 | 鸿富锦精密工业（深圳）有限公司 | Position holding device |
| CN102721822A (en) * | 2007-10-29 | 2012-10-10 | 松下电器产业株式会社 | Analysis device and analysis apparatus and analysis method using the same |
| CN103344206A (en) * | 2013-06-27 | 2013-10-09 | 开平市盈光机电科技有限公司 | Detector for measuring thickness of optical disc base |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7904918B2 (en) | 2003-10-20 | 2011-03-08 | Panasonic Corporation | Disk device for recording and reading information |
| KR100618897B1 (en) * | 2005-05-12 | 2006-09-01 | 삼성전자주식회사 | Spindle motor for hard disk drive |
-
2001
- 2001-12-17 JP JP2001382493A patent/JP3751558B2/en not_active Expired - Fee Related
-
2002
- 2002-10-11 KR KR1020020062078A patent/KR20030051203A/en not_active Application Discontinuation
- 2002-12-17 CN CN02157161A patent/CN1427405A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100336654C (en) * | 2005-04-15 | 2007-09-12 | 罗铁威 | Vacuum magnetically controlled bonding method and apparatus for high-density optical disc production |
| US7802270B2 (en) | 2006-01-16 | 2010-09-21 | Fujitsu Ten Limited | Disk reproducing apparatus |
| CN102721822A (en) * | 2007-10-29 | 2012-10-10 | 松下电器产业株式会社 | Analysis device and analysis apparatus and analysis method using the same |
| CN102721822B (en) * | 2007-10-29 | 2013-11-06 | 松下电器产业株式会社 | Instrument drive device for analysis |
| CN102248746A (en) * | 2010-05-21 | 2011-11-23 | 鸿富锦精密工业（深圳）有限公司 | Position holding device |
| CN102248746B (en) * | 2010-05-21 | 2014-04-30 | 鸿富锦精密工业（深圳）有限公司 | Position holding device |
| CN103344206A (en) * | 2013-06-27 | 2013-10-09 | 开平市盈光机电科技有限公司 | Detector for measuring thickness of optical disc base |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3751558B2 (en) | 2006-03-01 |
| KR20030051203A (en) | 2003-06-25 |
| JP2003187510A (en) | 2003-07-04 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |