CN1577529A - Optical pick-up device - Google Patents
Optical pick-up device Download PDFInfo
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- CN1577529A CN1577529A CN 200410061883 CN200410061883A CN1577529A CN 1577529 A CN1577529 A CN 1577529A CN 200410061883 CN200410061883 CN 200410061883 CN 200410061883 A CN200410061883 A CN 200410061883A CN 1577529 A CN1577529 A CN 1577529A
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- lens retainer
- lens
- retainer
- yoke
- drive coil
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- 230000003287 optical effect Effects 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
Provided is an optical pickup device which comes down in weight, improves high-speed followability, improves accuracy in assembly and reduces the tilt of a lens in a tilting direction. A pair of right and left through-holes 33-36, which penetrate a york 18 facing a driving magnet 15 across a driving coil 12, are formed in a lens holder 3 holding an objective lens 2 in a focusing direction, and at least the forkedly formed tips of the york 18 are each exposed to the openings of the through-holes 33-36. The lens holder 3 comes down in weight by forming the through-holes 33-36 in the lens holder 3 and forming the york 18 forkedly. By this, the high-speed followability of the optical pickup device becomes possible.
Description
Technical field
The present invention relates to be used for the optical take-up apparatus of the record, regeneration etc. of optical recording disks such as CD and DVD.Especially relate to the rope that the lens retainer that will keep object lens supports by tinsel and hang the optical take-up apparatus of mode.
Background technology
As the optical take-up apparatus of the record of the optical recording disk that is used for CD and DVD etc., regeneration etc., known have a kind of tinsel that utilizes that the lens retainer that keeps object lens is supported, and object lens are hung mode towards the rope that tracking direction and focus direction drive.This rope hangs the optical take-up apparatus of mode, has: the lens retainer that keeps object lens; The lens retainer supporting member that utilizes tinsel that this lens retainer is supported; Be used for the magnetic drive mechanism of lens retainer towards tracking direction and focus direction driving.Magnetic drive mechanism has focusing and uses drive coil with drive coil and tracking in the side of lens retainer, have the tracking focusing drive magnet that is arranged on the lens retainer supporting member.
Such rope hangs in the optical take-up apparatus of mode, by 4 one metal wires the lens retainer supported usually, and inhomogeneous etc. because of the spring rate of these installation accuracies wiry and tinsel itself, the lens retainer is with respect to inclined light shaft sometimes.When the optical axis of the signal regeneration light beam that sees through described object lens tilts with respect to cd side, then produce optic aberration, crosstalk increases, the regenerated signal deterioration.In addition, when the optical axis of signal record light beam tilts with respect to cd side, then tracer signal generation deterioration produces pit sometimes and forms mistake.On the other hand, along with the high speed of disc drive appts, to the lightweight of lens retainer and improve rigidity, it is also more and more higher that the high speed that improves actuator is followed performance demands.
In traditional optical take-up apparatus, in order to detect the amount of warpage radially of disc, signal beams is modified to suitable inclination angle, such as, in the optical disc apparatus that is disclosed in the Japanese patent laid-open 6-1625406 communique (patent documentation 1), as described magnetic drive mechanism, be arranged on the side that utilizes the object lens platform that many one metal wires support with coil the pitch drives of a pair of rectangle, simultaneously with coil the pair of angled drive magnet is set relatively, controls with light beam to vergence direction with described pitch drives.On the other hand, for the lightweight of lens retainer and improve rigidity, as lens retainer material, when developing new material with the high rigidity of light weight, utilize numeric value analysis etc. that lens retainer structure is improved (such as reference patent documentation 2,3).
Patent documentation 1: Japanese patent laid-open 6-1625406 communique
Patent documentation 2: Japanese patent laid-open 9-35303 communique
Patent documentation 3: Japanese patent laid-open 9-198676 communique
The optical take-up apparatus that above-mentioned patent documentation 1 is disclosed can be revised the inclination angle of the light beam of vergence direction.But, the pair of angled that tilt correction is used drives with coil and is provided on the two sides of x direction of object lens platform, simultaneously, be provided on the two sides of y direction with drive coil following the tracks of, so optical take-up apparatus must become large-scale, and weight increases the problem that existence can't be followed at a high speed for the pit of CD.In addition, and quantity that constitute each yoke of magnetic loop relative with these each drive coils and drive magnet etc. also increases, and becomes the weight cause of increased of optical take-up apparatus, simultaneously, needs a lot of yokes, complex structure, the problem that also exists cost to rise.And because of complex structure, so the assembling of device is loaded down with trivial details, existence can't improve the problem of product qualified rate.
In view of this, the object of the present invention is to provide a kind of quantification in light weight that can make device, improve the high speed tracing ability, and can improve assembly precision, reduce the optical take-up apparatus at the lens inclination angle of vergence direction.
Content of the present invention
In order to address the above problem, technical scheme 1 described optical take-up apparatus of the present invention, on the lens retainer that keeps object lens, forming on focus direction has the drive coil yoke relative with drive magnet to connect the pair of right and left open-work of insertion intermediary, and the front end that makes front form two forked described yokes at least exposes from the opening of described open-work respectively.On the lens retainer, be formed for connecting the open-work that inserts yoke, two forked by described yoke is formed simultaneously, can make the lightweight of lens retainer, can improve the high speed tracing ability of optical take-up apparatus.In addition, confirm by front position during assembling, can confirm the assembly precision of lens retainer, improve product qualified rate, enhance productivity the yoke that exposes of described open-work.
In addition, technical scheme 2 described optical take-up apparatus, the pair of right and left open-work that on described lens retainer, forms, be formed between the lens maintaining part and outer frame that keeps described object lens, the bridge part that is connected with outer frame by the described lens maintaining part of the upper face side that is arranged on described lens retainer to the major general is divided and is formed, and described outer frame disposes the described drive coil with the outside configured separate of described lens maintaining part.By the pair of right and left open-work is formed between the lens maintaining part and outer frame of lens retainer, in the lens retainer, form the space, make the lightweight of lens retainer own, so can improve the high speed tracing ability.In addition, utilize bridge part that the lens maintaining part is connected with outer frame, so, also can improve the rigidity of lens retainer even lens maintaining part and outer frame form thin-walled.
And, technical scheme 3 described optical take-up apparatus, the pair of openings that forms on the described lens retainer, left-right symmetric forms on tracking direction, two forked each front end that form on described yoke are configured from the inner face of described opening with leaving predetermined distance respectively.During assembling, carry out instrumentation or affirmation, can easily judge assembly precision by distance to the inner face of the front end of yoke and opening.
And technical scheme 4 described optical take-up apparatus make the opening that forms on the described lens retainer become detent when the inner face of tracking direction surpasses the movable range of described lens retainer.Opening and described yoke butt by with the lens retainer can make the abnormal operation of lens retainer stop, can pre-antisitic defect.
In addition, technical scheme 5 described optical take-up apparatus, described lens retainer, utilize described retainer supporting member and many one metal wires supported movably at tracking direction and focus direction, during described drive coil no power, two forked front ends of described yoke are positioned at the substantial middle of the opening of described lens retainer.During no power during assembling operation etc., confirm, can carry out the affirmation of the assembling position of bearing state wiry and lens retainer, can improve the assembly precision of optical take-up apparatus by the substantial middle that two of yoke forked front ends is positioned at opening.
The effect of invention
As mentioned above, optical take-up apparatus of the present invention, on the lens retainer that keeps object lens, on focus direction, be formed for connecting the open-work that inserts yoke, each front end that makes front form two forked described yokes exposes from the opening of described open-work respectively, so by the open-work that on the lens retainer, forms and form two forked yokes, can make the lightweight of lens retainer, can improve the high speed tracing ability of optical take-up apparatus.In addition, confirm that the assembly precision of the lens retainer under the no "on" position in the time of can confirming to assemble etc. improves product qualified rate, enhances productivity by front position to the yoke that exposes from described open-work.
In addition, the invention of technical scheme 2, the pair of right and left open-work that forms on described lens retainer is formed between lens maintaining part that keeps described object lens and the outer frame that leaves this outside configuration, is formed by both bridge part divisions of connection.In the lens retainer, form the space, can alleviate the weight of lens retainer itself.
And, the invention of technical scheme 3, the pair of openings that forms on the described lens retainer, left-right symmetric forms on tracking direction, two forked each front end that form on yoke are configured from the inner face of described opening with leaving predetermined distance respectively, during assembling, carry out instrumentation or affirmation, can easily judge assembly precision by distance to the inner face of the front end of yoke and opening.
And the invention of technical scheme 4 constitutes detent by making the opening that forms on the described lens retainer when the lens retainer surpasses movable range, the abnormal operation of lens retainer is stopped, can pre-antisitic defect.
In addition, the invention of technical scheme 5, the lens retainer utilizes many one metal wires supported movably at tracking direction and focus direction, during no power, two forked front ends of yoke are positioned at the substantial middle of the opening of described lens retainer, by this position is confirmed, can carry out the affirmation of the assembling position of bearing state wiry and lens retainer, can improve the assembly precision of optical take-up apparatus.
The simple declaration of accompanying drawing
Fig. 1 is the stereographic map of object lens driving mechanism of the optical take-up apparatus of expression embodiments of the invention.
Fig. 2 is the side view of expression object lens driving mechanism shown in Figure 1.
Fig. 3 is the vertical view of expression object lens driving mechanism shown in Figure 1.
Fig. 4 is the stereographic map of the major part of expression lens retainer of the present invention.
Fig. 5 is the exploded perspective view of the assembled state of expression object lens driving mechanism of the present invention.
Fig. 6 is the front view of the major part of expression lens retainer of the present invention.
Embodiment
Below, the embodiment to optical take-up apparatus of the present invention describes with reference to accompanying drawing.
Optical take-up apparatus, it is the device that is used for the optical recording disk of CD or DVD etc. is carried out information record, information regeneration, utilize semi-permeable mirror that the laser that penetrates from LASER Light Source is reflected, utilize object lens to carry out optically focused, focus is connected on the information recording surface of optical recording disk.Light by optical recording disk reflection is injected photodetector by object lens and semi-permeable mirror, carries out information regeneration according to the light signal of the reception light of this photodetector and handles.In addition, according to the output signal from photodetector, drive controlling object lens driving mechanism carries out servocontrol to position on tracking direction, focus direction or the vergence direction of object lens and angle, on the other hand, lasing light emitter is carried out drive controlling.
Fig. 1 is the stereographic map of object lens driving mechanism of the optical take-up apparatus of expression present embodiment, has the driving mechanism that described object lens are driven towards vergence direction.Object lens driving mechanism 1 comprises: the lens retainer 3 that object lens 2 are kept; The supporting member 26 that described lens retainer 3 is supported by 6 one metal wires 4,5,6,7 (tinsel 8,9 is not shown); Be used for magnetic drive mechanism that lens retainer 3 is driven towards the focus direction shown in the tracking direction shown in the arrow Tr, the arrow Fo, the vergence direction shown in the arrow Ti.Tinsel 4,5,6 be configured for to after chat focusing drive coil 12, follow the tracks of with drive coil 13 and tilt with the current return of drive coil 14 energisings.
Magnetic drive mechanism comprises: the focusing drive coil 12 of the ring-type around the main part of the lens retainer of chatting after being arranged on 3; The tracking drive coil 13 that 4 planar coils pasting in the outside that focuses on drive coil 12 constitute; Pair of angled drive coil 14.In addition, retainer supporting member 10 has: focus on drive magnet 15 with focusing on drive coil 12 and follow the tracks of the relative a pair of tracking of drive coil 13; The a pair of focusing relative with focusing on drive coil 12 and pitch drives coil 14 is tilted with drive magnet 16.
Above-mentioned focusing tilts to use drive magnet 16 with respect to lens retainer 3, and the inner face of the outer yoke 17 of formation is holded up in the outside that is fixed in tracking direction Tr from the base plate of retainer supporting member 10.In addition, yoke 18 in the relative position of the inner face with outer yoke 17 of retainer supporting member 10 is provided with.
A pair of tracking focuses on drive magnet 15, is fixed in the inner face of holding up an external yoke 19 of formation from the base plate of retainer supporting member 10 towards the direction of quadrature with drive magnet 16 with respect to focusing on.In addition, retainer supporting member 10 and inboard lens retainer 3 are promptly, the position relative with the inner face of outer yoke 19 be provided with interior yoke 20.
So in the object lens driving mechanism 1 of structure, focus on and tilt to use drive magnet 16 and follow the tracks of focusing relative with drive magnet 15 with drive coil 12 and focusing,, lens retainer 3 can be driven towards focus direction Fo to focusing on by tinsel with the drive coil 12 logical predetermined electric current that go up.
Tilt with drive coil 14, relative with the focusing inclination with drive magnet 16, by leading to upward predetermined electric current to tilting with drive coil 14, lens retainer 3 can be driven towards vergence direction Ti by tinsel.
Follow the tracks of with drive coil 13 and use drive magnet 15 relative,, lens retainer 3 can be driven towards tracking direction Tr by leading to upward predetermined electric current to following the tracks of with drive coil 13 by tinsel with tracking focusing.
As shown in Figure 4, lens retainer 3 has: have the lens maintaining part 3a of the open-work of circular in central authorities for keeping object lens 2; Be wound with focusing drive coil 12 at outer peripheral face, set the outer frame 3b that drive coil 13 is used in tracking of respectively being made up of 2 coils in the both sides of tangential direction Ta.And, separate between above-mentioned outer frame 3b and the lens maintaining part 3a, forming with above-below direction in each both sides of tangential direction Ta and tracking direction Tr is the space that focus direction Fo is communicated with.In addition, each bridge part 3c, 3d by the upside that is arranged on lens retainer 3 between these outer frames 3b and the lens maintaining part 3a are connected, and above-mentioned space is divided by bridge part 3c, 3d, forms a pair of lens 33,34 in the both sides of tangential direction Ta.Form a pair of open- work 35,36 respectively in the both sides of tracking direction Tr.These openings are left-right symmetric on tangential direction Ta and tracking direction Tr.Above-mentioned inclination is sticked on the downside inner face of the coffin that is formed at tracking direction Tr both sides with drive coil 14 as shown in Figure 4.
On the other hand, the interior yoke 18 relative with the inner face of outer yoke 17 reaches the relative interior yoke 20 of inner face with outer yoke 19, connects respectively to be inserted in the above-mentioned space that forms on lens retainer 3.The front of yokes 18,20 in these forms two forkedly as shown in Figures 3 and 4, and the front end 18a of interior yoke 18, the front end 20a of interior yoke 20 avoid above-mentioned bridge part 2c, 2d and expose from the opening of above-mentioned open- work 33,34,35,36 respectively.Therefore, two forked front end 18a of interior yoke 18, separate with respect to the inner face of the opening of open- work 33,34 and roughly to be configured in central authorities equidistantly, two forked front end 20a of interior yoke 20 separate with respect to the inner face of the opening of open- work 35,36 and roughly to be configured in central authorities equidistantly.There is very big relation the front end of yoke 18,20 and the position of opening with guaranteeing assembly precision as described later in these.
As mentioned above, make lens maintaining part 3a separate formation with lens retainer 3 with outer frame 3b, between connect by bridge part 3c, 3d, such structure can make lens retainer 3 lightweight significantly.In addition, by being provided with drive coil 14 Miniaturizable in the space between lens maintaining part 3a and outer frame 3b.On the other hand, it is two forked that the front by yoke 18,20 in making forms, and can make the yoke lightweight, adds the lightweight of said lens retainer 3, and the moving part lightweight of optical take-up apparatus is so can improve the high speed tracing ability.
The lens retainer 3 that keeps above-mentioned object lens platform 2 is by 6 one metal wires 4,5,6 with regulation spring constant ... support movably at tracking direction Tr, focus direction Fo and vergence direction Ti.These tinsels 4,5,6 ... as shown in Figure 2, in the both sides in the tracking direction Tr of lens retainer 3 outside respectively 3 be 1 group, tinsel 4 and 6 is configured in upper face side and the following side of the focus direction Fo of lens retainer 3, tinsel 5 is configured near the tinsel 4 of upper face side of close center of focus direction Fo of tinsel 4 and 6.These tinsels 4,5,6 separate with downside and centre thereof abreast with the upside of the focus direction Fo of lens retainer 3 respectively.The group that 3 one metal wires constitute is in the symmetria bilateralis ground configuration of the tracking direction Tr of lens retainer 3, and be identical structure, so among Fig. 2, only the side's that tinsel 4,5,6 is formed group describes, the opposing party's group is identical with a side group, its explanation of Therefore, omited.
The tinsel 4,5,6 of one side's group is fixed on base end side on the wiring graph of vertically installing with respect to retainer supporting member 10 such as printed base plate 21 by scolding tin etc. respectively.In addition, tinsel 4 and 6 front are fixed on the fixed part 23,24 of the front side that is arranged at lens retainer 3 such as the means of utilizing bonding etc., and are fixed by utilizing scolding tin etc. to be connected with the wiring graph of the printed base plate 22 on the front side of the lens retainer 3 that further prolongs that is sticked.Be positioned near the front of the tinsel 5 the tinsel 4, connect and insert the open-work that is formed at fixed part 23, utilize scolding tin etc. to be fixed on the wiring graph of printed base plate 22.Above-mentioned open-work, its internal diameter form enough greatlyyer than the outside dimension of tinsel 5, can not hinder moving of tinsel 5.
In the optical take-up apparatus of above structure, lens retainer unit 30 shown in Figure 5 is assembled by being installed on the retainer supporting member 10.Promptly, at first as mentioned above, by object lens 2 are installed in the lens maintaining part 3a of the central authorities that remain on lens retainer 3, simultaneously, outer peripheral face at outer frame 3b is provided with focusing drive coil 12 and tracking drive coil 13, and, be sticked at the downside inner face in space with drive coil 14 by tilting, make lens retainer unit 30 obtain assembling.And, utilize scolding tin etc. with 6 one metal wires 4,5,6 ... front end be connected and fixed with the wiring graph of the printed base plate 22 on lens retainer 3 that is sticked respectively, utilize scolding tin etc. that base end side is separately fixed on the wiring graph of the printed base plate 21 that is installed on supporting member 26 simultaneously, make lens retainer unit 30 obtain assembling.
On the other hand, as shown in Figure 5, retainer supporting member 10 will follow the tracks of focus on drive magnet 15 be fixed in stand up an external yoke 19 that forms from base plate 10a on, simultaneously, will focus on equally inclination with drive magnet 16 be fixed in stand up an external yoke 17 of formation from base plate 10a on.In addition, the interior yoke 18,20 relative with these outer yokes 19,17 holded up formation from 1 sheet metal with base end side, and utilizes affixed means such as spot welding and above-mentioned base plate 10b integrally formed.
The top of lens retainer unit 40 from above-mentioned retainer supporting member 10 descended, connect respectively and insert in the above-mentioned space that is formed on the lens retainer 3, the front of yoke 18,20 is exposed from the opening of above-mentioned open- work 33,34,35,36 respectively in making.And, engaging protrusion (not shown) insertion that is formed at the bottom surface of supporting member 26 is formed in the connecting hole 10b of base plate 10a, under the state of location, be fixed.
So under the state of assembling, said lens retainer unit 30 obtains assembling with pre-determined precision, in addition, if lens retainer unit 30 is installed on the retainer supporting member 10 with good precision, then front end 18a, the 20a of yoke 18,20 roughly separate with respect to the inner face of the opening of open- work 33,34,35,36 and are configured in central authorities equidistantly in each.But, such as, the tinsel 4,5,6 of lens retainer unit 30 ... the occasion of fixed precision difference and the occasion of the occasion that produces distortion such as tinsel or lens retainer unit 40 and the installation accuracy difference of retainer supporting member 10, front end 18a, the 20a of yoke 18,20 are in the position of departing from respect to the inner face of the opening of open- work 33,34,35,36 in each.When this departs from size and has surpassed specialized range, judge that this optical take-up apparatus is bad.
Thus during assembling operation, promptly, not to focusing on drive coil 12 and following the tracks of under the no power state that drives with drive coil 13 etc., by to the opening of open- work 33,34,35,36 and in each front end 18a, the position of 20a of yoke 18,20 confirm, can easily judge assembly precision, remove unacceptable product in advance, can improve product qualified rate.
In addition, as shown in Figure 6, the inner face of the opening by will being formed at lens retainer 3 and be set at than the big slightly size of common movable range on the tracking direction Tr of lens retainer 3 such as the size G between the end face of the tracking direction Tr of interior yoke 20, when the lens retainer 3 unusual occasions that drive, the inner face of above-mentioned opening can play a role as detent.Promptly, to focusing on drive coil 12 and following the tracks of under the "on" position that drives with drive coil 13 etc., because of Drive and Control Circuit etc. flow through excessive electric current to following the tracks of with drive coil 13 unusually, then lens retainer 3 will be above the common movable range of tracking direction Tr.At this moment, inner face and interior yoke 20 butts of the tracking direction Tr by being formed at the opening on the lens retainer 3 can stop excessive the moving of lens retainer 3.Therefore, can make the inner face of the tracking direction Tr of opening constitute detent.
In the foregoing description, the opening of the open- work 33,34,35,36 that is formed on the lens retainer 3 and front end 18a, the 20a of each interior yoke 18,20 have been used, as optical take-up apparatus, need confirm or need detent the position relation of lens retainer 3 on tracking direction Tr, so also can use a side the opening of open- work 35,36 and the front end 20a of each interior yoke 20.
More than present inventor's inventive embodiment is specified, but the present invention is not limited to the foregoing description, can carry out various distortion in its aim scope.Be not limited to the structure of above-mentioned optical take-up apparatus, also other structures.
Claims (5)
1. an optical take-up apparatus comprises: to focusing on the lens retainer that the object lens on the optical recording media keep from the ejaculation light of light source; The retainer supporting member that this lens retainer is movably supported on tracking direction, focus direction; Be arranged on a plurality of drive coils on the described lens retainer side face; Be configured in the position relative and constitute described drive coil and the drive magnet in a plurality of magnetic drive loop with this drive coil; Accompany this drive magnet and described drive coil and relative yoke, it is characterized in that,
Described lens retainer is formed with the pair of right and left open-work that connects the described yoke of insertion on focus direction,
Described yoke, front forms two forkedly at least, and each front end exposes from the opening of described open-work respectively.
2. optical take-up apparatus as claimed in claim 1, it is characterized in that, the pair of right and left open-work that on described lens retainer, forms, be formed between the lens maintaining part and outer frame that keeps described object lens, the bridge part that couples together by described lens maintaining part and outer frame by the upper face side that will be arranged on described lens retainer is at least divided and is formed, and described outer frame disposes the described drive coil with the outside configured separate of described lens maintaining part.
3. optical take-up apparatus as claimed in claim 1, it is characterized in that, the opening that forms on the described lens retainer forms left-right symmetric on tracking direction, two forked each front end that form on described yoke separate predetermined distance respectively and dispose from the inner face of described opening.
4. as claim 1 and 2 described optical take-up apparatus, it is characterized in that, the opening that on described lens retainer, forms, constitute when the inner face of tracking direction during above the movable range of described lens retainer as detent.
5. optical take-up apparatus as claimed in claim 1, it is characterized in that, described lens retainer, utilize described retainer supporting member and many one metal wires to be supported at tracking direction and focus direction removable, when described drive coil did not have energising, two forked front ends of described yoke were positioned at the substantial middle of the opening of described lens retainer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003180380A JP2005018863A (en) | 2003-06-25 | 2003-06-25 | Optical pickup device |
| JP2003180380 | 2003-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1577529A true CN1577529A (en) | 2005-02-09 |
| CN1295692C CN1295692C (en) | 2007-01-17 |
Family
ID=34181382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100618833A Expired - Fee Related CN1295692C (en) | 2003-06-25 | 2004-06-25 | Optical pick-up device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005018863A (en) |
| CN (1) | CN1295692C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479522A (en) * | 2010-11-24 | 2012-05-30 | 日立视听媒体股份有限公司 | Optical pickup |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09198676A (en) * | 1996-01-19 | 1997-07-31 | Sankyo Seiki Mfg Co Ltd | Device for driving objective lens |
| JPH11250477A (en) * | 1998-03-03 | 1999-09-17 | Matsushita Electric Ind Co Ltd | Object lens driving device |
| KR100636103B1 (en) * | 1999-10-21 | 2006-10-18 | 삼성전자주식회사 | Optical pickup assembly |
-
2003
- 2003-06-25 JP JP2003180380A patent/JP2005018863A/en active Pending
-
2004
- 2004-06-25 CN CNB2004100618833A patent/CN1295692C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479522A (en) * | 2010-11-24 | 2012-05-30 | 日立视听媒体股份有限公司 | Optical pickup |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1295692C (en) | 2007-01-17 |
| JP2005018863A (en) | 2005-01-20 |
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