WO2004017307A2 - An optical disk drive, and a method of assembling it - Google Patents

An optical disk drive, and a method of assembling it Download PDF

Info

Publication number
WO2004017307A2
WO2004017307A2 PCT/IB2003/003730 IB0303730W WO2004017307A2 WO 2004017307 A2 WO2004017307 A2 WO 2004017307A2 IB 0303730 W IB0303730 W IB 0303730W WO 2004017307 A2 WO2004017307 A2 WO 2004017307A2
Authority
WO
WIPO (PCT)
Prior art keywords
pcb
unit
optical disk
disk drive
pick
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.)
Ceased
Application number
PCT/IB2003/003730
Other languages
French (fr)
Other versions
WO2004017307A3 (en
Inventor
Rudy W. J. Pollen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to EP03787973A priority Critical patent/EP1550118A2/en
Priority to AU2003253206A priority patent/AU2003253206A1/en
Priority to US10/524,407 priority patent/US7242644B2/en
Priority to JP2004528769A priority patent/JP2005535999A/en
Publication of WO2004017307A2 publication Critical patent/WO2004017307A2/en
Publication of WO2004017307A3 publication Critical patent/WO2004017307A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G11B7/085—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
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly

Definitions

  • An optical disk drive and a method of assembling it
  • the invention relates to an optical disk drive according to the preamble of claim 1.
  • an optical disk drive generally comprises an optical pick-up unit, a linear guide, a sub-frame, a spring-mounted frame and a disk drive motor.
  • Signals to and from the optical pick-up unit are transmitted to and from a printed circuit board (PCB) through a so-called FLEX connection.
  • PCB printed circuit board
  • FLEX connection conducts read, write, servo, and power signals.
  • the amplitudes and sensitivities of these signals are very different. This leads to crosstalk problems of these signals.
  • the optical pick-up unit is normally produced in a separate production site. If an optical pick-up unit is built into the optical disk drive in an another production line, assembly tolerances are added to the production tolerances of an optical pick-up unit. This results in a non-negligible percentage of rejects in the production, once after production of the pick unit and once after assembly of the drive. In principle, production tolerances and assembly tolerances can compensate for each other, but due to the testing after production of the pick-up unit this compensation cannot be used since pick-up units will be rejected before compensation can take place.
  • An embodiment of an optical disk drive according to the preamble of the claim 1 is known, for example, from US-A-5,214,630.
  • the optical pick-up unit is split into a fixed part comprising the light source and a movable part comprising at least a mirror, focusing lens, and lens-moving elements.
  • the size and weight of the movable part is reduced substantially thereby, so that response times can be reduced as well. Also the flexible signal connection can be simplified.
  • An object of the present invention is to further improve the optical disk drive of the type referred to in the preamble.
  • the optical disk drive according to the invention is characterized by the features of the characterizing portion of claim 1.
  • the PCB comprises electronic components that are mounted to the PCB on a side thereof facing an adjacent housing wall.
  • the arrangement of the electronic components on a side opposite from the other components, or in other words on the side facing the adjacent housing wall, keeps the heat of the electronic components away from the optical pick-up unit, thereby improving reliability and accuracy. Furthermore, it is easier to remove this heat from the drive unit by conduction, which may obviate the need for a cooling fan. If such cooling fan is not used, no air filter is necessary either. This reduces the cost and creates possibilities for further miniaturization. A further improvement of the removal of heat from the housing is obtained if the PCB is mounted to the housing through heat-conducting mounting means, such as a heat-conducting mat.
  • the flexible wires are contained within a wire flex which is bendable about one bending axis only, said bending axis being substantially parallel to the shaft of the drive motor.
  • This arrangement of the wire flex means that it can be kept away from components which are sensitive to EMC or electrical radiation. It is also renders possible a flatter design of the disk drive.
  • the invention also relates to a method of assembling an optical disk drive, comprising the steps of providing a housing, a drive motor, and a drive shaft to be mounted within the housing and adapted to engage the disk for rotating it, an optical pick-up unit comprising a light source, at least a mirror and a focusing lens to create a focused beam, a guide for moving the focused beam along the disk, and a printed circuit board connected to the guide through flexible wires.
  • an optical pick-up unit comprising a light source, at least a mirror and a focusing lens to create a focused beam, a guide for moving the focused beam along the disk, and a printed circuit board connected to the guide through flexible wires.
  • the main electrical components are mounted on one side of the PCB, and then the slide, the pick-up unit, and the drive motor are mounted on the opposite side of the PCB.
  • Fig. 1 is a very schematic sectional side view of an optical disk drive according to the invention.
  • Fig. 2 is a very schematic plan view of the drive of Fig. 1.
  • the drawing very schematically shows an optical disk drive for reading and or writing an optical disk D.
  • the optical disk may be of any type, for example CD, CD-ROM, DVD or the like, which are readable or writable.
  • the optical disk drive is thus for recording and/or reproducing information on the information track of the optical disk D.
  • the optical disk drive comprises a housing, very schematically indicated with reference numeral 1, for accommodating components of the disk drive.
  • the housing 1 is made of metal.
  • the housing 1 has a closable opening (not shown) for introducing and removing the disk D into and from the disk drive.
  • a drive motor 2 having a drive shaft 3 and a hub 4 for receiving the disk D thereon in order to allow the disk D to be rotated by the drive motor 2.
  • the housing 1 further contains an optical pick-up unit (OPU) 5 adapted to read information from or write information on the optical disk D by means of a focused light beam 6.
  • OPU optical pick-up unit
  • the optical pick-up unit 5 comprises a fixed part 7 and a movable part 8.
  • the fixed part 7 is mounted in stationary position, whereas the movable part 8 is movable so as to move the focused light beam 6 along the surface portion of the disk D containing information.
  • the movable part 8 is movable in radial direction with respect to the disk D by means of a linear guide 9 comprising guide rails 10 and supports 11.
  • the fixed part 7 of the optical pick unit 5 comprises means for producing the light beam 6, such as a (laser) light source and peripherals. It also comprises means for receiving the beam of light reflected from the disk D. The output signal of the receiving means is used for reproducing the information on the disk D and also for controlling the focused beam 6.
  • the movable part 8 of the optical pick-up unit 5 comprises a mirror 13 for reflecting the light beam 6 and the reflected light beam through 45° and further comprises a focusing lens 14 and actuator means (not shown) in order to move the lens 14 to properly direct and focus the beam 6 on the optical disk D.
  • a micro stepping motor 15 is provided operatively connected to the movable part 8 through a threaded spindle 16.
  • Alternative driving and transmission means are obviously equally conceivable.
  • the drive motor 2, the fixed part 7 of the optical pick-up unit 5, and the supports 11 of the linear guide 9 of the movable part 8 of the optical pick-up unit 5 are mounted on a single printed circuit board (PCB) 17.
  • the printed circuit board 17 not only accommodates electronic components and connections to provide for the electronic control, but also forms a mounting base for the main parts of the disk drive unit.
  • the stepping motor 15 is also mounted on PCB 17.
  • the main electronic components 18 of the PCB 17 are mounted on the side of the PCB 17 facing the adjacent wall of the housing 1, i.e. opposite to the optical means and the drive means for the disk D.
  • the heat of these electronic components can be dissipated by a heat conducting (plastic) mat 19 onto which the PCB is mounted. The heat can be effectively removed from the interior of the disk drive through this mat 19 and the metal wall of the housing 1.
  • the PCB 17 and the lens actuators on the movable part 8 of the optical pick-up unit 5 are electrically and electronically connected through flexible wires combined in a wire flex 20.
  • This wire flex 20 is flexible in one direction only and, according to the invention, the wire flex 20 is bendable about an axis substantially parallel to the drive shaft 3 of the drive motor 2 as shown in Fig. 2.
  • the wire flex 20 may be very simple and may contain as many as four wires which conduct signals of similar magnitudes, thereby reducing or preventing crosstalk problems. Assembly of the PCB 17 and components is as follows. First of all, electronic components 18 are mounted to the lower side of the PCB 17.
  • the invention provides an optical disk drive which is simple, reliable and robust, and which has a high performance and a longer lifetime.
  • the method of assembling the optical disk drive leads to a lower percentage of rejects.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

An optical disk drive comprises an optical pick-up unit (5) comprising a fixed part (7) with at least a light source, and a movable part (8) mounted on a guide (9) and comprising at least a mirror (13), a focusing lens (14), and lens-moving elements. The movable part is adapted to move a focused beam along the disk (D). A PCB (17) comprises a signal connection to the lens-moving elements on the movable part of the pick-up unit through flexible wires (20). Only one PCB (17) is provided which serves as a mounting base for the fixed part (7) of the optical pick-up unit (5), the guide (9), and the drive motor (2).

Description

An optical disk drive, and a method of assembling it
The invention relates to an optical disk drive according to the preamble of claim 1.
In the prior art, an optical disk drive generally comprises an optical pick-up unit, a linear guide, a sub-frame, a spring-mounted frame and a disk drive motor. Signals to and from the optical pick-up unit are transmitted to and from a printed circuit board (PCB) through a so-called FLEX connection. This connection conducts read, write, servo, and power signals. The amplitudes and sensitivities of these signals are very different. This leads to crosstalk problems of these signals.
Furthermore, the optical pick-up unit is normally produced in a separate production site. If an optical pick-up unit is built into the optical disk drive in an another production line, assembly tolerances are added to the production tolerances of an optical pick-up unit. This results in a non-negligible percentage of rejects in the production, once after production of the pick unit and once after assembly of the drive. In principle, production tolerances and assembly tolerances can compensate for each other, but due to the testing after production of the pick-up unit this compensation cannot be used since pick-up units will be rejected before compensation can take place.
An embodiment of an optical disk drive according to the preamble of the claim 1 is known, for example, from US-A-5,214,630. The optical pick-up unit is split into a fixed part comprising the light source and a movable part comprising at least a mirror, focusing lens, and lens-moving elements. The size and weight of the movable part is reduced substantially thereby, so that response times can be reduced as well. Also the flexible signal connection can be simplified.
An object of the present invention is to further improve the optical disk drive of the type referred to in the preamble. The optical disk drive according to the invention is characterized by the features of the characterizing portion of claim 1.
Due to the presence of only one PCB onto which the components are mounted, there is no need for many connectors, which increases the reliability. The connection to the lens-moving means of the pick-up unit remains, but this is not a sensitive connection. Due to the integration of the optical pick-up unit in the production and assembly process, only one final test is necessary which will reduce the percentage of rejects and will simplify test procedures.
Preferably, the PCB comprises electronic components that are mounted to the PCB on a side thereof facing an adjacent housing wall.
The arrangement of the electronic components on a side opposite from the other components, or in other words on the side facing the adjacent housing wall, keeps the heat of the electronic components away from the optical pick-up unit, thereby improving reliability and accuracy. Furthermore, it is easier to remove this heat from the drive unit by conduction, which may obviate the need for a cooling fan. If such cooling fan is not used, no air filter is necessary either. This reduces the cost and creates possibilities for further miniaturization. A further improvement of the removal of heat from the housing is obtained if the PCB is mounted to the housing through heat-conducting mounting means, such as a heat-conducting mat. An embodiment of the disk drive in which the housing is made of metal not only improves the heat-conducting properties even more, but also improves the EMC shielding. Due to the better heat removal there is no need for large cooling openings in the housing wall, which further improves the shielding effect, both for radiation into and out of the housing. According to a preferred embodiment, the flexible wires are contained within a wire flex which is bendable about one bending axis only, said bending axis being substantially parallel to the shaft of the drive motor.
This arrangement of the wire flex means that it can be kept away from components which are sensitive to EMC or electrical radiation. It is also renders possible a flatter design of the disk drive.
It is preferred to mount a linear guide for the movable part of the optical pickup unit directly on the PCB. This greatly simplifies the design. It is made possible due to critical parts being more rigidly mounted on the PCB. The heat-conducting mat, if any, will reduce vibrations if shocks occur. A plastic mat will also serve as a mechanical filter for high frequencies. The use of a fixed part and a movable part for the pick-up unit will reduce the mass of the components around the moving lens, thus increasing the possible servo bandwidth.
The invention also relates to a method of assembling an optical disk drive, comprising the steps of providing a housing, a drive motor, and a drive shaft to be mounted within the housing and adapted to engage the disk for rotating it, an optical pick-up unit comprising a light source, at least a mirror and a focusing lens to create a focused beam, a guide for moving the focused beam along the disk, and a printed circuit board connected to the guide through flexible wires. According to the invention, first the main electrical components are mounted on one side of the PCB, and then the slide, the pick-up unit, and the drive motor are mounted on the opposite side of the PCB.
This will simplify the assembly of the disk drive unit since it is not necessary anymore to turn the PCB over. It further reduces assembly tolerances since all mechanical and optical parts are mounted from one side.
The invention will be explained in more detail with reference to the drawings showing an exemplary embodiment of the optical disk drive according to the invention in a very schematic way.
Fig. 1 is a very schematic sectional side view of an optical disk drive according to the invention.
Fig. 2 is a very schematic plan view of the drive of Fig. 1. The drawing very schematically shows an optical disk drive for reading and or writing an optical disk D. The optical disk may be of any type, for example CD, CD-ROM, DVD or the like, which are readable or writable. The optical disk drive is thus for recording and/or reproducing information on the information track of the optical disk D.
The optical disk drive comprises a housing, very schematically indicated with reference numeral 1, for accommodating components of the disk drive. Preferably, the housing 1 is made of metal. The housing 1 has a closable opening (not shown) for introducing and removing the disk D into and from the disk drive. Within the housing 1 there is mounted a drive motor 2 having a drive shaft 3 and a hub 4 for receiving the disk D thereon in order to allow the disk D to be rotated by the drive motor 2.
The housing 1 further contains an optical pick-up unit (OPU) 5 adapted to read information from or write information on the optical disk D by means of a focused light beam 6. According to the invention, the optical pick-up unit 5 comprises a fixed part 7 and a movable part 8. The fixed part 7 is mounted in stationary position, whereas the movable part 8 is movable so as to move the focused light beam 6 along the surface portion of the disk D containing information. In the case as shown, the movable part 8 is movable in radial direction with respect to the disk D by means of a linear guide 9 comprising guide rails 10 and supports 11.
The fixed part 7 of the optical pick unit 5 comprises means for producing the light beam 6, such as a (laser) light source and peripherals. It also comprises means for receiving the beam of light reflected from the disk D. The output signal of the receiving means is used for reproducing the information on the disk D and also for controlling the focused beam 6.
The movable part 8 of the optical pick-up unit 5 comprises a mirror 13 for reflecting the light beam 6 and the reflected light beam through 45° and further comprises a focusing lens 14 and actuator means (not shown) in order to move the lens 14 to properly direct and focus the beam 6 on the optical disk D.
In order to move the movable part 8 along the linear guide 9, i.e. to act as a slide along the guide rails 10, a micro stepping motor 15 is provided operatively connected to the movable part 8 through a threaded spindle 16. Alternative driving and transmission means are obviously equally conceivable.
As is clearly shown in Fig. 1, the drive motor 2, the fixed part 7 of the optical pick-up unit 5, and the supports 11 of the linear guide 9 of the movable part 8 of the optical pick-up unit 5 are mounted on a single printed circuit board (PCB) 17. Thus, the printed circuit board 17 not only accommodates electronic components and connections to provide for the electronic control, but also forms a mounting base for the main parts of the disk drive unit. The stepping motor 15 is also mounted on PCB 17.
The main electronic components 18 of the PCB 17 are mounted on the side of the PCB 17 facing the adjacent wall of the housing 1, i.e. opposite to the optical means and the drive means for the disk D. The heat of these electronic components can be dissipated by a heat conducting (plastic) mat 19 onto which the PCB is mounted. The heat can be effectively removed from the interior of the disk drive through this mat 19 and the metal wall of the housing 1.
The PCB 17 and the lens actuators on the movable part 8 of the optical pick-up unit 5 are electrically and electronically connected through flexible wires combined in a wire flex 20. This wire flex 20 is flexible in one direction only and, according to the invention, the wire flex 20 is bendable about an axis substantially parallel to the drive shaft 3 of the drive motor 2 as shown in Fig. 2. The wire flex 20 may be very simple and may contain as many as four wires which conduct signals of similar magnitudes, thereby reducing or preventing crosstalk problems. Assembly of the PCB 17 and components is as follows. First of all, electronic components 18 are mounted to the lower side of the PCB 17. Then the drive motor, the supports 11 with guide rails 10 and movable part 8 and the fixed part 7 are mounted on the upper side of the PCB 17. Finally there is one soldering step in which all connections between the components and the PCB 17 are made. Due to this way of assembling, it is not necessary to turn the PCB 17 over during production, while the addition of tolerances are prevented. It requires only one final measurement for testing.
From the foregoing it will be clear that the invention provides an optical disk drive which is simple, reliable and robust, and which has a high performance and a longer lifetime. The method of assembling the optical disk drive leads to a lower percentage of rejects.
The invention is not restricted to the above-described embodiment as shown in the drawing, which can be varied in several ways without departing from the scope of the invention.

Claims

CLAIMS:
1. An optical disk drive, comprising: a housing (1); a drive motor (2) and a drive shaft (3) mounted within the housing and adapted to engage the disk (D) for rotating it, an optical pick-up unit (5), including a fixed part (7) comprising at least a light source, and a movable part (8) with sliding mounted possibility on a guide (9) and comprising at least a mirror (13), a focusing lens (14), and lens-moving elements, said movable part being adapted to move a focused beam along the disk (D), a PCB (17) having a signal connection to the lens-moving elements on the movable part (8) of the pick-up unit through flexible wires (20), characterized in that only one PCB (1 ) is provided which serves as a mounting base for the fixed part (7) of the optical pick-up unit (5), the guide (9), and the drive motor (2).
2. The optical disk drive as claimed in claim 1, wherein the PCB (17) accommodates electronic components (18) which are mounted to the PCB (17) on a side thereof facing an adjacent housing wall.
3. The optical disk drive as claimed in claim 1 or 2, wherein the PCB (17) is mounted to the housing through heat-conducting mounting means, such as a heat-conducting mat (19).
4. The optical disk drive as claimed in claim 1 , wherein the flexible wires are contained within a wire flex (20) which is bendable about one bending axis only, said bending axis being substantially parallel to the shaft (3) of the drive motor (2).
5. The optical disk drive as claimed in any of the preceding claims, wherein the linear guide (9) for the movable part (8) of the optical pick-up unit (5) is mounted directly on the PCB (17).
6. The optical disk drive as claimed in any of the preceding claims, wherein the housing (1) is made of metal.
7. The optical disk drive as claimed in any of the preceding claims, wherein the movable part (8) of the pick-up unit (5) comprises an actuator having driving coils for the focusing lens, said driving coils being connected to the PCB through said flexible wires (2).
8. A method of assembling an optical disk drive, comprising the steps of: providing a housing (1), a drive motor (2), and a drive shaft (3) to be mounted within the housing and adapted to engage the disk (D) for rotating it, an optical pick-up unit (5), comprising a light source, at least a mirror (13) and a focusing lens (14) to create a focused beam, a guide (9) for moving the focused beam along the disk, and a PCB (17) having main electrical components (18) and being connected to the guide (9) through flexible wires (20), characterized in that first the main electrical components (18) are mounted on one side of the PCB (17), and then the guide (9), the pick-up unit (5), and the drive motor (2) are mounted on the opposite side of the PCB (17).
9. The method as claimed in claim 8, wherein the parts (2, 5, 9) and electrical components (18) are fixed to the PCB (17) in one soldering step.
PCT/IB2003/003730 2002-08-16 2003-07-31 An optical disk drive, and a method of assembling it Ceased WO2004017307A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP03787973A EP1550118A2 (en) 2002-08-16 2003-07-31 An optical disk drive, and a method of assembling it
AU2003253206A AU2003253206A1 (en) 2002-08-16 2003-07-31 An optical disk drive, and a method of assembling it
US10/524,407 US7242644B2 (en) 2002-08-16 2003-07-31 Optical disk drive, and a method of assembling it
JP2004528769A JP2005535999A (en) 2002-08-16 2003-07-31 Optical disk drive and method of assembling the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02078391 2002-08-16
EP02078391.6 2002-08-16

Publications (2)

Publication Number Publication Date
WO2004017307A2 true WO2004017307A2 (en) 2004-02-26
WO2004017307A3 WO2004017307A3 (en) 2004-05-21

Family

ID=31725467

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/003730 Ceased WO2004017307A2 (en) 2002-08-16 2003-07-31 An optical disk drive, and a method of assembling it

Country Status (7)

Country Link
US (1) US7242644B2 (en)
EP (1) EP1550118A2 (en)
JP (1) JP2005535999A (en)
KR (1) KR20050027277A (en)
CN (1) CN1675699A (en)
AU (1) AU2003253206A1 (en)
WO (1) WO2004017307A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018803A1 (en) * 2004-04-15 2005-10-27 Deutsche Thomson-Brandt Gmbh A recording or reproducing apparatus for optical recording media
CN105855879A (en) * 2016-06-16 2016-08-17 上海托展机电设备有限公司 Driver assembly line

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6672228B2 (en) * 2017-09-05 2020-03-25 株式会社東芝 Disk unit

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0731436Y2 (en) * 1987-12-01 1995-07-19 ティアツク株式会社 Optical pickup device
JPH0266774A (en) * 1988-08-31 1990-03-06 Toshiba Corp Recording and reproducing device
US5023861A (en) * 1988-12-20 1991-06-11 Literal Corporation Single stage tracking actuator apparatus for optical beam information storage drive system
US5119362A (en) * 1989-12-28 1992-06-02 Sony Corporation Disc player with a pickup feeding apparatus
JP2626115B2 (en) 1990-01-10 1997-07-02 松下電器産業株式会社 Optical head
JPH04121833A (en) * 1990-09-13 1992-04-22 Canon Inc Separation type optical head
CN1069988C (en) * 1994-09-20 2001-08-22 松下电器产业株式会社 Objective lens actuator
JPH0973767A (en) * 1995-06-29 1997-03-18 Ricoh Co Ltd Disk drive
TW423693U (en) * 1995-07-26 2001-02-21 Teac Corp Disk device having a flexible printed circuit cable providing a small-height structure
US6385156B1 (en) * 1998-03-31 2002-05-07 Ken'ichi Furukawa Positioning structure of a flexible printed circuit for a pick-up used in a disc drive and pick-up assembly used in a disc drive
US6320723B1 (en) * 1999-06-24 2001-11-20 Seagate Technology Llc Protective cover for a disc drive printed circuit board wherein the cover and a circuit board component are thermally connected
JP2001053393A (en) * 1999-08-06 2001-02-23 Fujikura Ltd Flexible circuit board and optical pickup device using the same
KR100395953B1 (en) * 2001-05-10 2003-08-27 주식회사 히타치엘지 데이터 스토리지 코리아 Heat dissipator for optical writing and/or reproducing device
US20030016597A1 (en) * 2001-07-18 2003-01-23 Takashi Haruguchi Actuator apparatus for optical pickup having tilt control
CN1224017C (en) * 2001-10-03 2005-10-19 松下电器产业株式会社 Optical disk deivce
KR100464074B1 (en) * 2001-12-19 2004-12-30 엘지전자 주식회사 Optical pick-up actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018803A1 (en) * 2004-04-15 2005-10-27 Deutsche Thomson-Brandt Gmbh A recording or reproducing apparatus for optical recording media
CN105855879A (en) * 2016-06-16 2016-08-17 上海托展机电设备有限公司 Driver assembly line

Also Published As

Publication number Publication date
CN1675699A (en) 2005-09-28
KR20050027277A (en) 2005-03-18
AU2003253206A8 (en) 2004-03-03
AU2003253206A1 (en) 2004-03-03
US7242644B2 (en) 2007-07-10
JP2005535999A (en) 2005-11-24
EP1550118A2 (en) 2005-07-06
WO2004017307A3 (en) 2004-05-21
US20050265138A1 (en) 2005-12-01

Similar Documents

Publication Publication Date Title
KR20010093031A (en) Optical pick up actuator
KR100888938B1 (en) Objective lens driving apparatus, optical pickup apparatus and optical information recording and / or reproducing apparatus
US7242644B2 (en) Optical disk drive, and a method of assembling it
KR20040037893A (en) Actuator for optical pickup, optical pickup apparatus and optical recording/ reproducing apparatus adopting the same
JP2000252577A (en) Laser beam emission unit
US8938746B2 (en) Object lens driving device and optical disc drive including the same
KR19980083599A (en) Integrated Actuator for Optical Pickup
CN100570719C (en) Lens driving device and optical pickup
KR0181819B1 (en) A motor driven optical pick up
KR0181822B1 (en) Motor Drive Optical Pickup Drive
JP2008310884A (en) Optical head device and method for adjusting characteristics of the same
KR100754717B1 (en) An Optical Head Device
JP2000163776A (en) Optical pickup, damper base used for the same, and adjustment method thereof
JP4350666B2 (en) Objective lens driving device, optical pickup device and optical disk device
JP2002111114A (en) Laser diode fixing method
US20080159090A1 (en) Optical pickup and disk drive device
KR100403145B1 (en) Making method of one body type optical pick-up actuator
JP4290590B2 (en) Objective lens driving device, optical pickup device and optical disk device
JP3762639B2 (en) Method for assembling optical head device
EP1426935A2 (en) Optical pickup actuator and optical recording and/or reproducing apparatus and method for using the same
JPH10112061A (en) Optical disk drive
JP2001101672A (en) Optical disk drive
JP2000231742A (en) Optical pickup device
US20110242960A1 (en) Light emitting device and method for manufacturing light emitting device
JP2003109237A (en) Optical pickup, optical disk recording / reproducing device, integrated optical unit

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2003787973

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 3212/CHENP/2004

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 2004528769

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 10524407

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1020057002471

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 20038194678

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 1020057002471

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 2003787973

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 2003787973

Country of ref document: EP