WO2005088619A1 - 光学ピックアップ装置 - Google Patents
光学ピックアップ装置 Download PDFInfo
- Publication number
- WO2005088619A1 WO2005088619A1 PCT/JP2005/004527 JP2005004527W WO2005088619A1 WO 2005088619 A1 WO2005088619 A1 WO 2005088619A1 JP 2005004527 W JP2005004527 W JP 2005004527W WO 2005088619 A1 WO2005088619 A1 WO 2005088619A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pickup device
- optical pickup
- movable
- base
- stopper member
- Prior art date
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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
- G11B7/0925—Electromechanical actuators for lens positioning
Definitions
- the present invention relates to an optical pickup device for reading or writing information on an optical recording medium.
- the optical pickup device of Patent Document 1 includes an actuator section in which a movable section having a lens holder with a built-in objective lens is movably connected to an actuator base by four linear elastic members, and both sides of the movable section.
- a suspension base provided with a pair of yokes to which a pair of magnets opposed to each other are fixed by providing a predetermined space, and a standing portion opposed to each other so as to surround a side surface of the movable portion in the tracking direction; It is configured with.
- a pair of fixed arms separated by a predetermined distance in the focus direction are provided on both side surfaces of the lens holder of the movable portion. Further, an insertion hole is provided in the standing portion, and a stove member is attached.
- the stopper member is made of a metal linear member, and is formed by being bent into a substantially U-shape. A stop portion is formed at the U-shaped tip portion of the stopper member, and is disposed substantially at the center of a fixed arm formed at a position separated from a side surface of the lens holder of the movable portion in the focus direction.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-229556 (Page 9, FIG. 1, FIG. 2)
- Patent Document 1 while moving, the movement of the movable part in the focusing direction is restricted by the stopper member, and the movement of the movable part in the tracking direction is restricted by the upright part. For this reason, when installing the movable part on the suspension base, in order to maintain the accuracy of the movable range of the movable part, the components that determine the movable range of these movable parts, that is, the stopper member, must be set up. High dimensional accuracy is required for the mounting portion, the insertion hole provided in the standing portion, the suspension base in which the standing portion is provided, and the movable portion, and the installation work of these components becomes complicated.
- the stopper member is formed of metal, there is a possibility that the spring characteristics will be changed due to permanent deformation due to strong impact. Furthermore, it is necessary to perform an insulation treatment to avoid an electrical short circuit with an electric circuit provided on the suspension base or the movable part, which causes a problem that the operation becomes complicated and the production cost increases.
- the optical pickup device of the present invention has an actuator base and a lens, and is movable in a focus direction directed to the optical axis direction of the lens and a tracking direction intersecting the focus direction.
- a movable portion connected to the actuator base via an elastic member, a focus direction regulating portion for regulating movement of the movable portion in the focus direction, and a tracking direction regulating portion for regulating movement in the tracking direction.
- a stopper member integrally formed of synthetic resin.
- FIG. 1 is an overall perspective view of an optical pickup device according to the present embodiment.
- FIG. 2 is a front view of a pick-up actuator.
- FIG. 3 is a perspective view of a pick-up actuator, showing a modification of the suspension of the present embodiment.
- FIG. 4 is a front view of a stopper member.
- FIG. 5 is a sectional view of a stopper member.
- FIG. 6 is a side view of a stopper member.
- FIG. 7 is a side view showing a modified example of the stopper member.
- FIG. 1 to 6 show an optical pickup device 1 according to the present embodiment.
- the optical pickup device 1 includes an actuator base 10 as a base member, a pick-up actuator 20, and a stopper member 30.
- the optical pickup device 1 is a disk-shaped optical recording device having an information recording surface such as a CD or DVD. It is incorporated in a recording medium drive that records information on a recording medium or reproduces the recorded information. Examples of the recording medium drive include a CD drive or a DVD drive connected to the inside or outside of a terminal device such as a personal computer, a CD player or a DVD player connected to a television or an audio device, or a single device. Functional portable CD players.
- the optical pickup device 1 is mounted at a position facing an information recording surface of an optical recording medium stored in such a recording medium driving device so as to be movable in a radial direction (tracking direction T) of the information recording surface. Have been.
- the actuator base 10 is attached to a pickup support (not shown).
- This pickup support is connected to a drive mechanism (not shown), and moves the optical pickup device in the tracking direction T along the surface of the optical recording medium under the control of the drive mechanism.
- a laser light source (not shown) is attached to the pickup support, and the laser light emitted from the laser light source passes below an objective lens 241 to be described later through an optical path formed by an optical system.
- a raising mirror (not shown) is arranged below the objective lens 241, and the laser light is changed its path upward by the raising mirror and passes through the objective lens 241 from below to above.
- An optical recording medium (not shown) is disposed above the objective lens 241, and the objective lens 241 focuses laser light on an information recording surface of the optical recording medium.
- the actuator base 10 is made of a relatively lightweight metal such as aluminum.
- the actuator base 10 includes a base portion 11 formed in a substantially flat rectangular shape, a pair of rising portions 13 rising in a direction orthogonal to the tracking direction of the base portion 11, and a pair of rising portions 13 rising substantially parallel to the tracking direction of the base portion 11. And a pair of magnets 15 fixed to the yoke 14.
- the base 11 has a mounting hole 12, and is attached to the pickup support by screwing the mounting hole 12 or the like.
- a pick-up actuator 20 is fixed to the base 11.
- the pick-up actuator 20 is mounted by disposing a movable portion 22, which will be described later, between a pair of rising portions 13 and a pair of magnets 15 at a predetermined distance from the rising portions 13 and the magnets 15.
- the suspension base 21 as a support Secure to the base 11 of the actuator base 10.
- the base 11 of the actuator base 10 is provided with a hole at a position corresponding to the base fixing hole 211 provided on the suspension base 21, and the hole and the base fixing hole 211 are screwed. By doing so, the suspension base 21 is fixed to the base 11.
- the mounting of the suspension base 21 is not limited to screwing, but may be a method in which the suspension base 21 is locked with a pin member and bonded and fixed with an adhesive.
- a protruding piece 16 is formed on the base 11 in accordance with the shape of the M-shaped groove 212 formed on the suspension base 21. The projection 16 functions as positioning when the suspension base 21 is fixed by engaging the M-shaped groove 212 of the suspension base 21.
- a positioning groove 131 is formed in the rising portion 13, and a stopper member 30 described below is positioned and fixed in the positioning groove 131. Further, the yoke 14 has a recess 141 formed in a part of the upper surface. The recess 141 is formed for introducing an adhesive for fixing the magnet 15. The magnets 15 are fixed to mutually facing surfaces of the pair of yokes 14 to form a magnetic field.
- a pick-up actuator 20 includes a suspension base 21 as a support fixed to the base 11 of the actuator base 10, and a movable part movably attached to the suspension base 21. 22 and a suspension 25 as an elastic member connecting the suspension base 21 and the movable part 22.
- the suspension base 21 and the movable part 22 are formed of a synthetic resin.
- the suspension 25 is made of a material having high strength to withstand strong bending stress as a spring material and having excellent fatigue resistance to repeated action, for example, a metal such as beryllium copper. Then, the suspension base 21 and the movable part 22 are insert-molded with the suspension 25 inserted therein. The suspension base 21 and the movable portion 22 are formed with a plurality of lightening portions 214 so that the thickness of the synthetic resin is substantially uniform. Prevents dents.
- the suspension base 21 has a base fixing hole 211, an M-shaped groove 212, and a suspension passage groove 213.
- the base fixing hole 211 is a hole penetrating the suspension base 21 in the tracking direction.
- the base fixing holes 211 serve as through holes for screws and pins for fixing the suspension base 21 to the base 11 of the actuator base 10 by screwing or pinning.
- the M-shaped groove 212 is formed on the surface of the suspension base 21 facing the actuator base 10. As described above, the M-shaped groove 2 12 is engaged with the projecting piece 16 formed on the base 11 of the actuator base 10 and is used for positioning the actuator base 10 and the suspension base 21. .
- the suspension through-grooves 213 are formed at four corners of the surface of the suspension base 21 facing the movable portion 22 in a substantially concave shape in the same direction as the longitudinal direction of the suspension 25.
- the suspension groove 213 is a groove through which the suspension 25 passes.
- the suspension groove 213 is filled with a damping agent between the suspension 25 and the suspension 25 to prevent the suspension 25 from vibrating up to a predetermined frequency.
- This damping agent is a gel-like damping chemical, and is filled between the suspension 25 and the suspension passage groove 213 to buffer the vibration of the suspension 25 and to enhance the fixing force of the suspension 25. ing.
- the movable part 22 includes a lens holder 24 for holding an objective lens 241 (see FIG. 1), and a fixed arm 23 as an elastic member fixing part that projects four in total from two sides of the movable part 22. And a coil substrate 26.
- the lens holder 24 is formed in a hollow shape through substantially the center of the movable portion in the focus direction.
- An objective lens 241 is fixed to the upper surface side of the lens holder 24. As described above, the lens holder 24 allows laser light of a predetermined intensity emitted from a laser light source of a pickup support (not shown) to pass therethrough, and the objective lens 241 transmits the laser light to the information recording surface of the optical recording medium. Collect light.
- the fixed arm 23 is formed so as to protrude in the tracking direction T at each of the four corners of the movable portion 22 opposite to the side facing the suspension base 21. Further, a pair of fixed arms 23 projecting from one side surface of the movable part 22 are formed at a predetermined interval in the focus direction.
- the suspension 25 is fixed to the fixed arm 23, The movable portion 22 is swingably connected to the suspension base 21 by the suspension 25.
- a pair of coil substrates 26 is fixed to a surface of the movable portion 22 facing the suspension base 21 and an opposite surface thereof.
- the pick-up actuator 20 is attached to the actuator base 10
- the movable part 22 is surrounded by the pair of rising portions 13 and the pair of yokes 14, as described above.
- the coil board 26 is arranged to face the magnet 15 fixed to the yoke 14. Therefore, the movable portion 22 is disposed within the magnetic field of the magnet 15, and a predetermined servo band (for example, 0 ⁇ 0) is applied to the focus coil (not shown) formed on the coil substrate 26 and the tracking coil (not shown).
- a drive current having a frequency of 5 KHz is applied, the movable portion 22 moves in the focus direction F and the tracking direction T due to the force generated by the current in the coil and the magnetic field.
- the suspension 25 has a flat plate portion 251 formed at both ends, a shaft portion 252 connected to the flat plate portion 251, and a wide portion 253 connected to the shaft portion 252.
- the shaft portion 252 formed on both ends of the suspension and the wide portion 253 sandwiched between the shaft portions 252 are formed over approximately one third of the entire length of the suspension 25 in the longitudinal direction.
- the entire length in the longitudinal direction of the suspension 25 means a length from the shaft 252 formed on one end to the shaft 252 formed on the other end. That is, the length L1 of the shaft 252 formed on one end, the length L3 of the shaft 252 formed on the other end, and the wide portion 253 connected to these shafts 252 Is formed to have substantially the same length dimension L2.
- the flat plate portion 251 is embedded and fixed to the suspension base 21 and the fixed arm 23 of the movable portion 22 during insert molding. Further, the flat plate portion 251 is fixed in a state where the tip end protrudes from the suspension base 21 or the fixed arm 23. A wiring (not shown) is electrically connected to a protruding portion at the tip of the flat plate portion 251 fixed to the suspension base 21, and an electric circuit (not shown) is connected. On the other hand, the protruding portion of the tip of the flat plate portion 251 fixed to the fixed arm 23 is connected to the coil board 26 fixed to the movable section 22 so that electric current flows through the coil board 26 via the suspension 25 with the electric circuit force.
- the shaft portion 252 is formed to extend linearly in a substantially axial shape.
- the damping agent is filled between the shaft portion 252 on the suspension base 21 side and the suspension passage groove 213 as described above, to enhance the fixing force between the suspension base 21 and the suspension 25 and at a predetermined time. It dampens vibration up to the frequency.
- the frequency that can be buffered is, for example, a frequency up to approximately 60 Hz, which can be adjusted by the type of the damping agent.
- the wide portion 253 is connected to the shaft portion 252, and is formed so as to increase the width in the tracking direction T. At this time, the wide portion 253 is formed in a tapered shape whose width dimension increases as the connection position force with the shaft portion 252 increases. Therefore, since excessive force is not applied to the connecting portion between the shaft portion 252 and the wide portion 253, breakage of the suspension 25 can be prevented.
- the wide portion 253 having such a large width dimension, the strength against torsion is improved, and the high-frequency vibration that cannot be buffered by the damping agent, for example, the frequency of the torsional resonance of the suspension 25 is provided. Is higher than the disk rotation frequency range.
- the shaft portion 252 of the suspension 25 may have a configuration in which a protruding surface 254 extending in the radial direction is formed.
- a protruding surface 254 When such a protruding surface 254 is provided, the contact area between the suspension 25 and the damping agent filled in the suspension passage groove 213 is increased, and the effect of damping the suspension by the damping agent can be more expected.
- the stopper member 30 is formed in a substantially U-shape using, for example, a synthetic resin as a material.
- the stopper member 30 includes a stopper base 31 as a connecting part, a connecting part 32 connected to the stopper base 31, and an arm 33 fixed to the tip of the connecting part 32.
- the stopper base 31 When the stopper member 30 is attached to the actuator base 10, the stopper base 31 has a locking piece 38 as a projection protruding in the direction of the yoke 14 and four corners of the stopper base 31. And a pressing piece 39 protruding in the direction of the yoke 14.
- the locking piece 38 is separated from the suspension base 21 of the pair of yokes 14 of the connector base 10 and locked in a concave portion 141 formed in the lower yoke 14.
- the holding piece 38 is locked with the holding piece 39.
- the yoke 14 and the magnet 15 fixed to the yoke 14 are sandwiched in the tracking direction.
- the stopper base 31 is positioned in the tracking direction of the actuator base 10 by the locking piece 38 and the pressing piece 39.
- the connecting portions 32 are formed on both side surfaces of the stopper base 31 so as to face the tracking direction T.
- a pair of arms 33 formed at the end of the connecting portion 32 are provided substantially in parallel on both side surfaces of the base portion 31.
- the arm 33 has a longitudinal direction substantially perpendicular to the tracking direction T and the focus direction F.
- the position of the arm 33 that moves away from the stopper base 31 is the distal end of the arm 33
- the position close to the stopper base 31 is the base end of the arm 33
- the stopper member 30 is the actuator base.
- the arm 33 is always urged by the connecting portion 32 in a direction in which the distal ends are separated from each other.
- a wall portion 34 that regulates a movable range of the movable portion 22 in the tracking direction T, and a movable portion protruding from these wall portions 34 are provided.
- the projections 35 for regulating the movable range of the focus direction F of 22 are integrally formed.
- the wall portion 34 is arranged at a predetermined distance from the distal end of the fixed arm 23 of the movable portion 22, and the wall portion 34 The area between the sections 34 is the movable range of the movable section 22 in the tracking direction T.
- the tip of the fixed arm 23 comes into contact with the wall portion 34, and the swing of the movable portion 22 is restricted.
- the protrusion 35 is arranged at an intermediate position between a pair of fixed arms 23 provided apart from each other in the focus direction.
- the distance until the protrusion 35 comes into contact with the fixed arm 23 is the movable range of the movable part 22 in the focus direction F.
- the fixed arm contacts the protrusion 35, and the swing of the movable portion 22 is restricted.
- the movable part 22 may move in both the focus direction F and the tracking direction T, the dimension of the wall part 34 in the focus direction is formed to be larger than the movable range dimension of the movable part 22 in the focus direction. ing.
- a first engagement claw 36 as a positioning claw and a second engagement claw as a positioning claw are provided on a surface opposite to the surface on which the projection 35 of the pair of arms 33 is formed, that is, a surface in a direction away from each other.
- the engaging claw 37 are formed.
- the first engagement claw 36 is formed on the distal end side of the arm 33
- the second engagement claw 37 is provided on the base end side of the arm 33.
- Each of the engagement claws 36 and 37 is formed in a tapered shape in which the protrusion dimension is reduced in the direction in which the stopper member 30 is mounted. As described above, these engaging claws 36 and 37 are engaged with the positioning grooves 131 formed in the rising part 13 of the actuator base 10 to fix the stopper member 30 to the actuator base 10.
- the positioning groove 131 is formed to extend in a direction substantially perpendicular to the focus direction F and the tracking direction T, when fixing the stopper member 30, first, the first The engaging claw 36 is engaged with the positioning groove 131, and the stopper member 30 is slid along the positioning groove 131 as it is to engage the second engaging claw.
- the length of the positioning groove 131 in the longitudinal direction is the same as the distance from the distal end of the first engaging claw 36 to the proximal end of the second engaging claw 37, it is ensured that The engagement claws 36, 37 of the stopper member 30 can be fitted into the positioning grooves 131 of the actuator base 10 and fixed. Further, at this time, since the distal end side of the arm 33 is urged toward the positioning groove 131 by the connecting portion 32, the fixing force of the stopper member 30 is further improved.
- the stopper member 30 includes the protrusion 35 that regulates the movement of the movable portion 22 in the focus direction F and the wall portion 34 that regulates the movement in the tracking direction T. It is integrally formed of synthetic resin.
- the movable range can be determined by simultaneously restricting the bidirectional movement of the movable portion 22 in the focus direction F and the tracking direction T with one stop member 30. Accordingly, the number of parts that do not require the separate provision of the stop in the focus direction F and the tracking direction T as in the related art can be reduced, the cost can be reduced, and the installation work can be easily performed.
- the stopper member 30 of the present embodiment is formed of a synthetic resin with respect to the conventional metal wire stopper, it is not necessary to perform an insulation process. Therefore, it is possible to reduce the cost and labor for producing the stove member 30. Further, since the stopper member 30 is formed of a synthetic resin, even when a strong impact is applied, the strength of the stopper member 30 that does not undergo plastic deformation like a stopper of a metal wire can be increased.
- the wall 34 of the stopper member 30 is moved from the tip of the fixed arm 23 in the tracking direction T.
- the projection 35 is arranged in the middle of the fixed arm 23 formed so as to be spaced in the focus direction F.
- the movable range of the movable portion 22 in the tracking direction T is determined by the distance dimension of the wall portion 34 of the arm 33 of the stopper member 30 opposed thereto, and the movable range in the focus direction F is defined by the protrusion 35 and the fixed arm. Determined by the distance to 23. Therefore, the movable range of the movable portion 22 can be easily adjusted by the stopper member 30. Therefore, since a complicated mechanism is not required for setting the movable range of the movable section 22, the productivity of the optical pickup device 1 can be improved.
- the projection 35 is formed to project from the wall 34 in the tracking direction T. Accordingly, the protrusion 35 and the wall 34 can restrict the movable range of the movable part 22 in the focus direction F and the tracking direction T only by the positional relationship between the protrusion 35 and the wall 34 and the fixed arm 23. Therefore, the structure of the stopper member 30 can be simplified.
- the projection 35 and the wall 34 are provided in a pair with the movable part 22 interposed therebetween.
- the movable range of the movable portion 22 can be restricted from both side surfaces of the movable portion 22 by the pair of the protrusions 35 and the wall portion 34. Therefore, the regulation of the movable range of the movable section 22 can be more reliably performed.
- the pair of protrusions 35 and the wall 34 are connected to each other with the stopper base 31 interposed therebetween, and are integrally formed.
- the movable range of the movable portion 22 in the tracking direction T and the focus direction F can be restricted from one side surface of the movable portion 22 by one stopper member 30. Therefore, it is not necessary to separately dispose the stopper member 30 on both side surfaces of the movable portion 22, thereby improving the productivity and reducing the number of parts.
- a positioning groove 131 is formed in the rising portion 13 of the actuator base 10, and engaging claws 36, 37 for engaging with the positioning groove 131 are formed in the stopper member 30. .
- the operation of attaching the stopper member 30 to the actuator base 10 can be easily performed. Therefore, the productivity of the optical pickup device 1 can be improved. Further, since the stopper member 30 can be easily removed, the maintainability is also improved.
- the first engagement claw 36 is biased toward the positioning groove 131. Thereby, the first engagement claw 36 is securely engaged with the positioning groove 131 and is fixed. Therefore, the stopper member 30 can be securely fixed to the actuator base 10.
- the positioning groove 131 formed in the rising portion 13 of the actuator base 10 has a longitudinal direction substantially perpendicular to the focus direction F and the tracking direction T, and includes a stopper member. Numeral 30 slides along the longitudinal direction of the positioning groove 131 and fits and fixes the engagement claws 36 and 37. Thereby, the stopper member 30 can be fixed to the actuator base 10 smoothly. Therefore, the productivity of the optical pickup device 1 can be improved.
- a first engagement claw 36 and a second engagement claw 37 are formed on the arm 33, and these engagement claws 36, 37 are engaged with the positioning grooves 131.
- the stove member may rotate around the engaging claw.
- two positions of the positioning groove 131 can be supported by the first engagement claw 36 and the second engagement claw 37. For this reason, the stopper member 30 can be attached to the actuator base 10 without rotating.
- the distance from the distal end of the first engaging claw 36 to the proximal end of the second engaging claw 37 is substantially the same as the length of the positioning groove 131 in the longitudinal direction. .
- these engaging claws 36, 37 are arranged at both ends of the positioning groove 131, and the stopper member 30 is moved in the direction along the longitudinal direction of the positioning groove. There is no shift. Therefore, the stopper member 30 can be securely fixed to the actuator base.
- the stopper base 31 of the stopper member 30 is formed on the yoke 14 of the actuator base 10, and has a locking piece 38 that projects toward the recess 141.
- the stopper member 30 can be positioned on the actuator base 10 by engaging the locking piece 38 with the concave portion 141. For this reason, the mounting work of the stopper member 30 can be easily performed.
- the first engagement claw 36 and the second engagement claw 37 are formed in a tapered shape so that the protrusion dimension decreases in the mounting direction of the stopper member 30. Thereby, when the stopper member 30 is engaged with the engagement groove of the actuator base 10, the engagement claws 36 and 37 can be inserted into the positioning groove by sliding the tapered slope. And 37 can be easily installed.
- holding pieces 39 are provided in the same direction as the projecting direction of the locking pieces 38. Has been generated. Therefore, when the stopper member 30 is attached to the actuator base 10, these pressing pieces 39 can position the yoke 14 and the magnet 15 by sandwiching both side forces in the tracking direction.
- the stopper member 30 has the locking pieces 38 protruding from the stopper base 31 and the pressing pieces 39 formed at the four corners of the stopper base 31.
- a configuration may be adopted in which these locking pieces 38 and pressing pieces 39 are not formed on the stopper base 31. In this case, since the shape of the stopper member 30 can be simplified, the cost for manufacturing the stopper member 30 can be reduced.
- the positioning groove 131 is formed with the direction substantially orthogonal to the focus direction F and the tracking direction T as the longitudinal direction, but is not limited to this.
- a positioning hole may be formed at the rising portion of the actuator base and at a position corresponding to the engaging claw of the stopper member, and the engaging claw may be engaged with the positioning hole.
- the stopper member moves in a direction along the positioning groove, causing play.
- the stopper member can be fixed to the actuator base without worrying about play.
- the fixing force between the stopper member 30 and the actuator base 10 is increased by urging the arm 33 of the stopper member 30 toward the positioning groove.
- the protruding tip 361 of the engagement claw 36A may be formed to expand in the focus direction.
- the engaging claw 36A is engaged through the positioning groove 131, and the dimension of the protruding tip portion 361 in the focus direction F is larger than the dimension of the positioning groove 131 in the focus direction F. .
- the projection of the engagement claw 36A Although the example in which the end portion 361 is formed to be bulging is shown, the invention is not limited to this.
- a pin member or a screw is screwed into the positioning claw from the side opposite to the side where the arm is arranged.
- the stud member may be fixed with a screw or a pin member without using an engaging claw, and may be bonded and fixed with an adhesive or the like.
- the stopper member 30 is provided with arms 33 each having a wall portion 34 and a projection 35 on both side surfaces of the movable portion 22, and these arms 33 are attached to the stopper base 31 and the stopper base 31. Force showing the configuration of connection at the connection portion 32 and the connecting portion 32.
- the present invention is not limited to this.
- a stove member provided with a wall portion and a protrusion may be independently arranged on one of both side surfaces of the movable portion 22. In this configuration, since the stopper members are individually provided on both side surfaces of the movable portion 22, the positions of the respective stopper members can be more precisely fixed, and the movable range of the movable portion 22 can be more precisely controlled.
- a configuration may be adopted in which a stove member having a protrusion and a wall is formed only on one side of the movable part.
- the movable range of the movable portion cannot be restricted on the side where the stop member is not provided. Therefore, it is preferable to dispose the stopper members on both sides of the movable portion as in the present embodiment.
- the protrusion 35 protrudes from the wall 34, but is not limited to this.
- the protrusion may be made to protrude at a location other than the wall of the arm.
- a pair of protrusions may be formed at the upper and lower ends (both ends in the focus direction) of the wall portion, and the movable portion may have a configuration in which a movable range is restricted between the pair of protrusions.
- the force using the protrusion as the focus direction restricting portion and the wall portion as the tracking direction restricting portion is not limited to this.
- the focus direction restricting portion may be a string member that extends the stopper member force.
- the string member is stretched in a direction substantially perpendicular to the focus direction in parallel with two vertically above and below the movable range limit position of the movable portion in the focus direction, and the movable portion comes into contact with the string member. It may be one that regulates the movable range of the camera.
- the tracking direction restricting portion may be a string member provided on both side surfaces of the movable portion while the arm force of the stopper member is also extended and connected to the side surface of the movable portion.
- the present invention is not limited to this.
- the present invention has been particularly illustrated and described mainly with respect to a specific embodiment.
- the present invention is not limited to the above-described embodiment without departing from the technical idea and the scope of the object of the present invention.
- Those skilled in the art can make various modifications in the shape, material, quantity, and other detailed configurations.
- the stopper member 30 has a projection 35 for regulating the movement of the movable portion 22 in the focus direction F and a wall portion 34 for regulating the movement in the tracking direction T, which are integrally formed of synthetic resin. Thus, one stopper member 30 can simultaneously restrict bidirectional movement of the movable portion 22 in the focus direction F and the tracking direction T.
- the present invention can be used as an optical pickup device for reading or writing information on an optical recording medium.
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- Optical Recording Or Reproduction (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006511032A JP4088326B2 (ja) | 2004-03-16 | 2005-03-15 | 光学ピックアップ装置 |
US10/592,691 US7461390B2 (en) | 2004-03-16 | 2005-03-15 | Optical pick up apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004074606 | 2004-03-16 | ||
JP2004-074606 | 2004-03-16 |
Publications (1)
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WO2005088619A1 true WO2005088619A1 (ja) | 2005-09-22 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/004527 WO2005088619A1 (ja) | 2004-03-16 | 2005-03-15 | 光学ピックアップ装置 |
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US (1) | US7461390B2 (ja) |
JP (1) | JP4088326B2 (ja) |
WO (1) | WO2005088619A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US7558010B2 (en) | 2005-05-18 | 2009-07-07 | Samsung Electronics Co., Ltd. | Optical pick-up actuator and optical recording and/or reproducing apparatus including the optical pick-up actuator |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2128862A1 (en) * | 2008-05-30 | 2009-12-02 | Deutsche Thomson OHG | Flat actuator made from one piece of PCB |
JP4780152B2 (ja) * | 2008-06-30 | 2011-09-28 | 日本ビクター株式会社 | 光ピックアップ装置 |
TWM418375U (en) * | 2010-12-31 | 2011-12-11 | Topray Technologies Inc | Electromagnetic actuator for optical read/write head |
JP5439452B2 (ja) * | 2011-09-30 | 2014-03-12 | 株式会社日立メディアエレクトロニクス | 光ピックアップ |
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JP2821407B2 (ja) | 1995-11-28 | 1998-11-05 | 群馬日本電気株式会社 | 光ヘッド装置 |
JPH1021556A (ja) | 1996-06-28 | 1998-01-23 | Sony Corp | 光学ピックアップ装置 |
JP2000149294A (ja) | 1998-11-13 | 2000-05-30 | Toshiba Corp | 光ピックアップ |
JP3888821B2 (ja) | 2000-02-09 | 2007-03-07 | パイオニア株式会社 | ピックアップ装置及びその製造方法 |
JP3727826B2 (ja) * | 2000-05-08 | 2005-12-21 | アルパイン株式会社 | 光学式ピックアップ |
JP2003085794A (ja) | 2001-09-07 | 2003-03-20 | Sony Corp | 光学ヘッド駆動装置及び光学式情報処理装置 |
JP2003085796A (ja) | 2001-09-12 | 2003-03-20 | Sony Corp | 対物レンズ駆動装置及び光学ピックアップ装置 |
JP3892444B2 (ja) * | 2004-03-01 | 2007-03-14 | シャープ株式会社 | 対物レンズ駆動装置、およびこれを用いた光ピックアップ装置 |
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2005
- 2005-03-15 JP JP2006511032A patent/JP4088326B2/ja not_active Expired - Fee Related
- 2005-03-15 US US10/592,691 patent/US7461390B2/en not_active Expired - Fee Related
- 2005-03-15 WO PCT/JP2005/004527 patent/WO2005088619A1/ja active Application Filing
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JP2000182260A (ja) * | 1998-12-15 | 2000-06-30 | Sharp Corp | 対物レンズ駆動装置 |
JP2000260041A (ja) * | 1999-03-09 | 2000-09-22 | Fujitsu Ten Ltd | 光ピックアップ |
JP2002197690A (ja) * | 2000-12-27 | 2002-07-12 | Sharp Corp | 対物レンズ駆動装置および光ディスク装置 |
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US7558010B2 (en) | 2005-05-18 | 2009-07-07 | Samsung Electronics Co., Ltd. | Optical pick-up actuator and optical recording and/or reproducing apparatus including the optical pick-up actuator |
Also Published As
Publication number | Publication date |
---|---|
JP4088326B2 (ja) | 2008-05-21 |
JPWO2005088619A1 (ja) | 2008-01-31 |
US20070274164A1 (en) | 2007-11-29 |
US7461390B2 (en) | 2008-12-02 |
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