US20010012261A1 - Disk player capable of adjusting tilt of optical pickup - Google Patents
Disk player capable of adjusting tilt of optical pickup Download PDFInfo
- Publication number
- US20010012261A1 US20010012261A1 US09/221,111 US22111198A US2001012261A1 US 20010012261 A1 US20010012261 A1 US 20010012261A1 US 22111198 A US22111198 A US 22111198A US 2001012261 A1 US2001012261 A1 US 2001012261A1
- Authority
- US
- United States
- Prior art keywords
- optical pickup
- pickup unit
- guide shafts
- disk
- lead screw
- 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
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Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/082—Aligning the head or the light source relative to the record carrier otherwise than during transducing, e.g. adjusting tilt set screw during assembly of head
-
- 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
- G11B21/022—Programmed access in sequence to indexed parts of operating record carriers
- G11B21/025—Programmed access in sequence to indexed parts of operating record carriers of rotating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/0857—Arrangements for mechanically moving the whole head
- G11B7/08582—Sled-type positioners
Definitions
- the present invention relates to a disk player which is capable of adjusting a tilt of an optical pickup.
- an optical pickup records/reproduces information by emitting beams onto an optical disk, while moving across the optical disk.
- FIG. 1 shows a conventional disk player adopted in a notebook computer.
- the disk player is provided with a disk tray 10 , where a disk 19 is placed, moving in and out of a main body 11 .
- a turntable 15 on which the disk 19 is placed to rotate, and an optical pickup unit 14 , which emits optical beams onto the disk 19 to read information, are installed at the disk tray 10 .
- the optical pickup unit 14 which is supported by a lead screw 18 , moves across the disk 19 driven by a transfer motor 16 .
- the optical pickup unit 14 In order to accurately record/reproduce information on/from the disk 19 , the optical pickup unit 14 is required to emit beams perpendicular to a recording surface of the disk 19 . However, due to errors in assembling a disk player or in manufacturing parts thereof, the optical beam emitted from the optical pickup unit 14 often does not land perpendicular to the recording surface of the disk 19 . Thus, for the accurate recording/reproducing of information, means to adjust a tilt of an optical pickup is needed. Further, the adjustment means should not cause damage to the assembled state of the lead screw 18 and the optical pickup unit 14 , or disturb the smooth operation thereof. That is, means to adjust a tilt of the optical pickup is needed which can maintain a normal state of a transfer mechanism of the optical pickup.
- a disk player which includes: an optical pickup unit supported by guide shafts installed on a base for recording/reproducing information by emitting an optical beam onto a disk while moving along the guide shafts; a lead screw, rotated by a transfer motor, for transferring a driving force to move the optical pickup unit; an adjustment portion for adjusting a tilt of the optical pickup unit by moving up and down first ends of the guide shafts; and a power transfer portion having a threaded portion to be coupled to the lead screw and installed at the optical pickup unit to be capable of relatively rotating with respect to the optical pickup unit.
- the power transfer portion and the optical pickup unit rotate relative to each other so that the gear engagement state between the threaded portion and the lead screw can be maintained.
- the adjustment portion includes: a cam member rotatably installed at the base and having a cam groove formed aslant along the outer circumferential surface thereof such that first ends of the guide shafts are inserted therein; and a support block supporting the second end of each of the guide shafts.
- the power transfer portion includes: a frame fixed to one side of the optical pickup unit; and a pivot member coupled to the frame to be capable of relatively rotating and having a threaded portion formed thereon which is engaged with the lead screw.
- FIG. 1 is a plan view illustrating a partially cut-away conventional disk player
- FIG. 2 is a plan view illustrating a partially cut-away disk player according to an embodiment of the present invention
- FIG. 3 is a perspective view illustrating adjuster adopted in the disk player shown in FIG. 2;
- FIG. 4 is a perspective view illustrating a power transfer portion adopted in the disk player shown in FIG. 2.
- a disk player includes a main body 110 , a base 101 and a disk tray 100 which moves in and out of the main body 110 and where a disk (not shown) is placed.
- the base 101 is installed on the disk tray 101 .
- the base 101 is installed in the main body 110 in the case of a normal disk player, such as one for a desktop computer.
- the base 101 has mounted thereon a turntable 151 , which supports and rotates the disk, an optical pickup unit 140 which records/reproduces information by emitting a beam onto the disk, and a pair of guide shafts 170 , which support the optical pickup unit 140 so that it is capable of sliding across the disk.
- a lead screw 180 which is rotated by a transfer motor 160 , is installed at one side of the optical pickup unit 140 .
- the optical pickup unit 140 is coupled to the lead screw 180 by a power transfer portion 300 , which will be described later, and moves along the guide shafts 170 according to the rotation of the lead screw 180 .
- Adjustment means includes adjusters for adjusting a tilt of the optical pickup unit 140 by moving an end portion of each of the guide shafts 170 up and down are installed at the base 101 , wherein one of the adjusters is shown in FIG. 3.
- each adjuster includes a cam member 210 which is coupled to a first end of a guide shaft 170 to move the first end of the guide shaft 170 up and down and a support block 220 installed to support the second end of the guide shaft 170 .
- a cam groove 211 into which the first end of the guide shaft 170 is inserted, is formed to be aslant along the outer circumferential surface of the cam member 210 . Accordingly, as the cam member 210 rotates, the first end of the guide shaft 170 slides along the cam groove 211 and can ascend and descend.
- a support hole 221 into which the second end of the guide shaft 170 is inserted, is formed at one side of the support block 220 . It is preferable that the support hole 221 is formed to have a truncated conic shape so that the second end of the guide shaft 170 can slightly move corresponding to the movement of the first end of the guide shaft 170 .
- FIG. 4 shows the configuration of the power transfer portion 300 positioned next to the lead screw 180 and adjacent to one of the guide shafts 170 .
- the power transfer portion 300 includes a frame 310 coupled by screws 311 at the side surface of the optical pickup unit 140 and a pivot member 320 coupled to the frame 310 to be capable of pivoting.
- the frame 310 is manufactured by bending a high elastic metal plate.
- the pivot member 320 is coupled to a hole 310 a formed at the center of the frame 310 through an injection molding method. Accordingly, the pivot member 320 can pivot in a direction indicated by an arrow with respect to the center of the hole 310 a.
- a threaded portion 321 which gears with the lead screw 180 , is formed at one side of the pivot member 320 .
- the cam member 210 is rotated to adjust a tilt of the optical pickup unit 140 .
- a screw-driver groove 210 a is formed on the top surface of the cam member 210 so that the cam member 210 can be rotated by using a screw driver.
- the cam member 210 rotates, the first end of the guide shaft 170 slides along the cam groove 211 and rises.
- a tilt of the optical pickup unit 140 supported by the guide shaft 170 , changes.
- the frame 310 coupled to the optical pickup unit 140 , pivots slightly in a direction indicated by the arrow shown in FIG. 4 according to a change in the slant of the optical pickup unit 140 .
- the pivot member 320 is engaged with the lead screw 180 , the pivot member 320 and the frame 310 are rotated relative to each other.
- the normal gear engagement between the pivot member 320 and the lead screw 180 can be maintained.
- a tilt of the optical pickup unit can be adjusted such that a beam emitted from the optical pickup unit can perpendicularly land on the surface of the disk and, concurrently, a mechanism to transfer the optical pickup unit can be maintained in a normal state.
- optical pickup unit which is installed at the base of the disk player is described, it would be obvious to adopt the subject embodiment in an optical pickup unit installed inside a main body of a typical disk player.
Abstract
Description
- This application claims the benefit of Korean Application No. 97-76370, filed Dec. 29, 1997, in the Korean Patent Office, the disclosure of which is incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates to a disk player which is capable of adjusting a tilt of an optical pickup.
- 2. Description of the Related Art
- In a typical disk player, an optical pickup records/reproduces information by emitting beams onto an optical disk, while moving across the optical disk.
- FIG. 1 shows a conventional disk player adopted in a notebook computer. As shown in the drawing, the disk player is provided with a
disk tray 10, where adisk 19 is placed, moving in and out of amain body 11. Aturntable 15, on which thedisk 19 is placed to rotate, and anoptical pickup unit 14, which emits optical beams onto thedisk 19 to read information, are installed at thedisk tray 10. Theoptical pickup unit 14, which is supported by alead screw 18, moves across thedisk 19 driven by atransfer motor 16. - In order to accurately record/reproduce information on/from the
disk 19, theoptical pickup unit 14 is required to emit beams perpendicular to a recording surface of thedisk 19. However, due to errors in assembling a disk player or in manufacturing parts thereof, the optical beam emitted from theoptical pickup unit 14 often does not land perpendicular to the recording surface of thedisk 19. Thus, for the accurate recording/reproducing of information, means to adjust a tilt of an optical pickup is needed. Further, the adjustment means should not cause damage to the assembled state of thelead screw 18 and theoptical pickup unit 14, or disturb the smooth operation thereof. That is, means to adjust a tilt of the optical pickup is needed which can maintain a normal state of a transfer mechanism of the optical pickup. - It is an object of the present invention to provide a disk player having an improved structure which can adjust a tilt of an optical pickup unit so that an optical beam can be emitted which is perpendicular to a disk while concurrently maintaining a lead screw and a gear for transferring an optical pickup unit in a normal engaged state.
- Additional objects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
- Accordingly, to achieve the above and other objects of the present invention, there is provided a disk player which includes: an optical pickup unit supported by guide shafts installed on a base for recording/reproducing information by emitting an optical beam onto a disk while moving along the guide shafts; a lead screw, rotated by a transfer motor, for transferring a driving force to move the optical pickup unit; an adjustment portion for adjusting a tilt of the optical pickup unit by moving up and down first ends of the guide shafts; and a power transfer portion having a threaded portion to be coupled to the lead screw and installed at the optical pickup unit to be capable of relatively rotating with respect to the optical pickup unit. In the disk player, as the optical pickup unit moves up or down, the power transfer portion and the optical pickup unit rotate relative to each other so that the gear engagement state between the threaded portion and the lead screw can be maintained.
- It is preferable in the present invention that the adjustment portion includes: a cam member rotatably installed at the base and having a cam groove formed aslant along the outer circumferential surface thereof such that first ends of the guide shafts are inserted therein; and a support block supporting the second end of each of the guide shafts.
- Also, it is preferable in the present invention that the power transfer portion includes: a frame fixed to one side of the optical pickup unit; and a pivot member coupled to the frame to be capable of relatively rotating and having a threaded portion formed thereon which is engaged with the lead screw.
- These other objects and advantages of the invention will become apparent and more readily appreciated from the following description of the preferred embodiment, taken in conjunction with the accompanying drawings of which:
- FIG. 1 is a plan view illustrating a partially cut-away conventional disk player;
- FIG. 2 is a plan view illustrating a partially cut-away disk player according to an embodiment of the present invention;
- FIG. 3 is a perspective view illustrating adjuster adopted in the disk player shown in FIG. 2; and
- FIG. 4 is a perspective view illustrating a power transfer portion adopted in the disk player shown in FIG. 2.
- Reference will now be made in detail to the present preferred embodiment of the present invention, examples of which are illustrated in the accompanying drawings wherein like reference numerals refer to like elements throughout. The embodiment is described below in order to explain the present invention by referring to the figures.
- Referring to FIG. 2, a disk player according to an embodiment of the present invention includes a
main body 110, abase 101 and adisk tray 100 which moves in and out of themain body 110 and where a disk (not shown) is placed. In the case of a notebook computer where the disk player is slim (as shown in the embodiment of the present invention), thebase 101 is installed on thedisk tray 101. However, in the case of a normal disk player, such as one for a desktop computer, thebase 101 is installed in themain body 110. - The
base 101 has mounted thereon aturntable 151, which supports and rotates the disk, anoptical pickup unit 140 which records/reproduces information by emitting a beam onto the disk, and a pair ofguide shafts 170, which support theoptical pickup unit 140 so that it is capable of sliding across the disk. - A
lead screw 180, which is rotated by atransfer motor 160, is installed at one side of theoptical pickup unit 140. Theoptical pickup unit 140 is coupled to thelead screw 180 by apower transfer portion 300, which will be described later, and moves along theguide shafts 170 according to the rotation of thelead screw 180. - Adjustment means includes adjusters for adjusting a tilt of the
optical pickup unit 140 by moving an end portion of each of theguide shafts 170 up and down are installed at thebase 101, wherein one of the adjusters is shown in FIG. 3. The description which follows is the same for each of the adjusters positioned at ends of each of the guide shafts. As shown in the drawing, each adjuster includes acam member 210 which is coupled to a first end of aguide shaft 170 to move the first end of theguide shaft 170 up and down and asupport block 220 installed to support the second end of theguide shaft 170. Acam groove 211, into which the first end of theguide shaft 170 is inserted, is formed to be aslant along the outer circumferential surface of thecam member 210. Accordingly, as thecam member 210 rotates, the first end of theguide shaft 170 slides along thecam groove 211 and can ascend and descend. - A
support hole 221, into which the second end of theguide shaft 170 is inserted, is formed at one side of thesupport block 220. It is preferable that thesupport hole 221 is formed to have a truncated conic shape so that the second end of theguide shaft 170 can slightly move corresponding to the movement of the first end of theguide shaft 170. - FIG. 4 shows the configuration of the
power transfer portion 300 positioned next to thelead screw 180 and adjacent to one of theguide shafts 170. - The
power transfer portion 300 includes aframe 310 coupled byscrews 311 at the side surface of theoptical pickup unit 140 and apivot member 320 coupled to theframe 310 to be capable of pivoting. Theframe 310 is manufactured by bending a high elastic metal plate. Thepivot member 320 is coupled to ahole 310 a formed at the center of theframe 310 through an injection molding method. Accordingly, thepivot member 320 can pivot in a direction indicated by an arrow with respect to the center of thehole 310 a. Also, a threadedportion 321, which gears with thelead screw 180, is formed at one side of thepivot member 320. - As shown in FIGS. 3 and 4, in a disk player having the above structure according to the embodiment of the present invention, the
cam member 210 is rotated to adjust a tilt of theoptical pickup unit 140. A screw-driver groove 210 a is formed on the top surface of thecam member 210 so that thecam member 210 can be rotated by using a screw driver. As thecam member 210 rotates, the first end of theguide shaft 170 slides along thecam groove 211 and rises. Thus, a tilt of theoptical pickup unit 140, supported by theguide shaft 170, changes. - Then, the
frame 310, coupled to theoptical pickup unit 140, pivots slightly in a direction indicated by the arrow shown in FIG. 4 according to a change in the slant of theoptical pickup unit 140. Here, since thepivot member 320 is engaged with thelead screw 180, thepivot member 320 and theframe 310 are rotated relative to each other. Thus, the normal gear engagement between thepivot member 320 and thelead screw 180 can be maintained. - As described above, in the disk player according to the embodiment of the present invention, a tilt of the optical pickup unit can be adjusted such that a beam emitted from the optical pickup unit can perpendicularly land on the surface of the disk and, concurrently, a mechanism to transfer the optical pickup unit can be maintained in a normal state.
- In the present preferred embodiment above, although the optical pickup unit, which is installed at the base of the disk player is described, it would be obvious to adopt the subject embodiment in an optical pickup unit installed inside a main body of a typical disk player.
- Although one preferred embodiment of the present invention has been shown and described, it would be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR97-76370 | 1997-12-29 | ||
KR1019970076370A KR100269143B1 (en) | 1997-12-29 | 1997-12-29 | Disk player |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010012261A1 true US20010012261A1 (en) | 2001-08-09 |
US6373812B2 US6373812B2 (en) | 2002-04-16 |
Family
ID=19529229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/221,111 Expired - Lifetime US6373812B2 (en) | 1997-12-29 | 1998-12-28 | Disk player capable of adjusting tilt of optical pickup |
Country Status (3)
Country | Link |
---|---|
US (1) | US6373812B2 (en) |
JP (1) | JP3011710B2 (en) |
KR (1) | KR100269143B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6373812B2 (en) * | 1997-12-29 | 2002-04-16 | Samsung Electronics Co., Ltd. | Disk player capable of adjusting tilt of optical pickup |
US20040117811A1 (en) * | 2002-12-16 | 2004-06-17 | Hitoshi Furuya | Disk apparatus |
US20040205793A1 (en) * | 2003-01-27 | 2004-10-14 | Micro-Star Int'l Co., Ltd. | Optical pickup head adjusting mechanism for optical disc drive |
US20050108742A1 (en) * | 2001-01-31 | 2005-05-19 | Pioneer Corporation | Support mechanism and feeding unit including same |
EP1538611A2 (en) * | 2003-12-03 | 2005-06-08 | Sony Co., Ltd. | Optical disk device and carriage feed mechanism therefor |
US20070050789A1 (en) * | 2005-08-30 | 2007-03-01 | Chun-Yao Wang | Device for reducing the backlash of optical pickup head of optical disk device |
Families Citing this family (10)
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JP3888506B2 (en) * | 1999-10-07 | 2007-03-07 | アルパイン株式会社 | Optical pickup transport mechanism |
DE10023581A1 (en) * | 2000-05-13 | 2001-11-15 | Bosch Gmbh Robert | Optical scanning device e.g. for CD player in motor vehicle, has scanning head specifically provided with an objective for focusing light-beam on disc |
US6590854B2 (en) * | 2001-09-07 | 2003-07-08 | Gold Summit International Technology Corp. | Read-wrte head fine adjustment and driving structure |
JP3633588B2 (en) * | 2002-06-20 | 2005-03-30 | 日本電気株式会社 | Head drive device of disk device |
KR100480631B1 (en) * | 2002-11-14 | 2005-03-31 | 삼성전자주식회사 | Pickup unit feeding apparatus and optic disc drive using the same |
KR20040095006A (en) * | 2003-05-06 | 2004-11-12 | 삼성전자주식회사 | Optical pick-up transferring apparatus of optical disk drive |
JP4223980B2 (en) * | 2004-03-16 | 2009-02-12 | 株式会社日立エルジーデータストレージ | Optical disk device and sliding drive mechanism for optical pickup |
JP4369266B2 (en) * | 2004-03-19 | 2009-11-18 | パイオニア株式会社 | Pickup drive device and recording medium drive device provided with pickup drive device |
CN2750416Y (en) * | 2004-11-18 | 2006-01-04 | 鸿富锦精密工业(深圳)有限公司 | Driving mechanism of optical read head |
KR20060084692A (en) * | 2005-01-20 | 2006-07-25 | 삼성전자주식회사 | An optical disk player |
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KR950031363U (en) * | 1994-04-29 | 1995-11-22 | Rolling Cam for Disc Deck Lift of Compact Disc Changer | |
JP3349878B2 (en) * | 1995-11-09 | 2002-11-25 | アルパイン株式会社 | Head feeder |
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US6052358A (en) * | 1996-10-04 | 2000-04-18 | Sony Corporation | Head feeding mechanism and optical pick-up feeding mechanism |
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KR100269143B1 (en) * | 1997-12-29 | 2000-10-16 | 윤종용 | Disk player |
JP2001052346A (en) * | 1999-06-03 | 2001-02-23 | Matsushita Electric Ind Co Ltd | Optical pickup adjusting mechanism |
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JP4067256B2 (en) * | 1999-11-25 | 2008-03-26 | 松下電器産業株式会社 | Pickup moving mechanism of optical disk apparatus |
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- 1997-12-29 KR KR1019970076370A patent/KR100269143B1/en not_active IP Right Cessation
-
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- 1998-12-24 JP JP10366622A patent/JP3011710B2/en not_active Expired - Fee Related
- 1998-12-28 US US09/221,111 patent/US6373812B2/en not_active Expired - Lifetime
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6373812B2 (en) * | 1997-12-29 | 2002-04-16 | Samsung Electronics Co., Ltd. | Disk player capable of adjusting tilt of optical pickup |
US20050108742A1 (en) * | 2001-01-31 | 2005-05-19 | Pioneer Corporation | Support mechanism and feeding unit including same |
US7310806B2 (en) * | 2001-01-31 | 2007-12-18 | Pioneer Corporation | Support mechanism and feeding unit including same |
US20040117811A1 (en) * | 2002-12-16 | 2004-06-17 | Hitoshi Furuya | Disk apparatus |
US7219357B2 (en) * | 2002-12-16 | 2007-05-15 | Mitsumi Electric Co., Ltd. | Disk apparatus |
US20040205793A1 (en) * | 2003-01-27 | 2004-10-14 | Micro-Star Int'l Co., Ltd. | Optical pickup head adjusting mechanism for optical disc drive |
US7127730B2 (en) * | 2003-01-27 | 2006-10-24 | Micro-Star Int'l Co., Ltd. | Optical pickup head adjusting mechanism for optical disc drive |
EP1538611A2 (en) * | 2003-12-03 | 2005-06-08 | Sony Co., Ltd. | Optical disk device and carriage feed mechanism therefor |
US20050125817A1 (en) * | 2003-12-03 | 2005-06-09 | Atsuomi Ohno | Optical disk device and carriage feed mechanism therefor |
EP1538611A3 (en) * | 2003-12-03 | 2006-03-08 | Sony Corporation | Optical disk device and carriage feed mechanism therefor |
US20070050789A1 (en) * | 2005-08-30 | 2007-03-01 | Chun-Yao Wang | Device for reducing the backlash of optical pickup head of optical disk device |
Also Published As
Publication number | Publication date |
---|---|
JP3011710B2 (en) | 2000-02-21 |
KR19990056375A (en) | 1999-07-15 |
US6373812B2 (en) | 2002-04-16 |
JPH11250595A (en) | 1999-09-17 |
KR100269143B1 (en) | 2000-10-16 |
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