WO2010086957A1 - Optical pickup device - Google Patents

Optical pickup device Download PDF

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Publication number
WO2010086957A1
WO2010086957A1 PCT/JP2009/051268 JP2009051268W WO2010086957A1 WO 2010086957 A1 WO2010086957 A1 WO 2010086957A1 JP 2009051268 W JP2009051268 W JP 2009051268W WO 2010086957 A1 WO2010086957 A1 WO 2010086957A1
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WO
WIPO (PCT)
Prior art keywords
elastic
coil
tracking
focus
elastic holding
Prior art date
Application number
PCT/JP2009/051268
Other languages
French (fr)
Japanese (ja)
Inventor
快弥 宇佐美
Original Assignee
パイオニア株式会社
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 パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2009/051268 priority Critical patent/WO2010086957A1/en
Priority to JP2010548278A priority patent/JPWO2010086957A1/en
Publication of WO2010086957A1 publication Critical patent/WO2010086957A1/en

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    • 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
    • G11B7/0932—Details of sprung supports
    • 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
    • G11B7/0933—Details of stationary parts

Definitions

  • the present invention relates to an optical pickup device.
  • an optical pickup that records information recorded on a recording medium such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a BD (Blu-ray Disc), or reproduces the recorded information.
  • a recording medium such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a BD (Blu-ray Disc), or reproduces the recorded information.
  • the device is known.
  • the suspension wire is elastically fixed to the suspension holder by a suspension holder recess damping material filled in the suspension holder.
  • the suspension holder is provided with a flexible printed circuit board fixed to the end of the suspension wire by a solder fixing portion. Further, a suspension holder-flexible printed circuit board damping material is filled between the suspension holder and the flexible printed circuit board.
  • An object of the present invention is to provide an optical pickup device capable of reducing the variation in performance from product to product.
  • An optical pickup device of the present invention includes a base member, a support portion fixed to the base member, a movable portion having a lens, and an operation control portion that moves the movable portion relative to the support portion.
  • the operation control unit holds a coil, a coil holding unit provided in the movable unit, a magnet provided in the base member in a state of being substantially opposed to the coil via a gap, and the support unit.
  • a first elastic portion and a second elastic portion that are coupled to the movable portion and are electrically connected to the coil, and the movable portion is reciprocated by electromagnetic force generated by energizing the coil.
  • the support portion is formed in a shape extending substantially in a rod shape toward both sides in the tracking direction or both sides in the focus direction, and holds the first elastic portion and the second elastic portion, respectively. Characterized in that it comprises a holding portion and a second elastic holding part.
  • FIG. 1 is a perspective view of an optical pickup device according to an embodiment of the present invention. It is a top view from the focus direction F1 side of the said optical pick-up apparatus. It is a top view from the focus direction F2 side of the said optical pick-up apparatus.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 2. It is a side view from the position adjustment direction P1 side of the said optical pick-up apparatus.
  • FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 2. It is a figure which shows a tracking terminal and a focus terminal. It is a top view which shows the 1st, 2nd tracking suspension and a tracking coil connection member.
  • FIG. 6 is a plan view showing first to fourth focus suspensions and first and second focus connecting members. It is sectional drawing of a focus direction positioning member. It is sectional drawing which shows the manufacturing method of a suspension base.
  • Optical pick-up apparatus 10 ... Actuator base as a base member 21 ... Suspension base as a support part 24 ... Movable part 27 ... Operation control part 212,213,214,215 ... 1st, 2nd, 3rd, 4th Elastic holding portions 241, 242... First and second lenses 271. Magnet 272. Coil substrate as coil holding portion 273D, 274D... First and second tracking elastic portions 276D as first and second elastic portions. , 277D... First and second focus elastic portions as third elastic portions 278D, 279D... Third and fourth focus elastic portions as fourth elastic portions.
  • FIG. 1 is a perspective view of an optical pickup device according to an embodiment of the present invention.
  • FIG. 2 is a plan view from the focus direction F1 side of the optical pickup device.
  • FIG. 3 is a plan view from the focus direction F2 side of the optical pickup device.
  • 4 is a cross-sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a side view of the optical pickup device from the position adjustment direction P1 side.
  • 6 is a cross-sectional view taken along line VI-VI in FIG.
  • FIG. 7 is a diagram showing a tracking terminal and a focus terminal.
  • FIG. 8 is a plan view showing the first and second tracking suspensions and the tracking coil connecting member.
  • FIG. 9 is a plan view showing the first to fourth focus suspensions and the first and second focus connection members.
  • FIG. 10 is a cross-sectional view of the focus direction positioning member.
  • the optical pickup device 1 includes an actuator base 10 as a base member, a pickup actuator 20, and a focus direction positioning member 40 as a focus direction operation restricting portion.
  • the optical pickup device 1 is incorporated in a recording medium driving device that records information on a recording medium such as a CD, a DVD, or a BD, or reproduces the recorded information.
  • the optical pickup device 1 is attached to a position facing the information recording surface of a recording medium stored in such a recording medium driving device so as to be movable in the radial direction of the recording medium.
  • one side and the other side in the radial direction of the recording medium are tracking directions T1, T2, respectively, and one side and the other side in a direction perpendicular to the information recording surface of the recording medium are focus directions F1, F2, respectively.
  • One side and the other side of the direction orthogonal to the tracking direction T1 and the focus direction F1 are referred to as position adjustment directions P1 and P2, respectively.
  • 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 1 in the tracking directions T1 and T2 along the surface of the recording medium under the control of the drive mechanism.
  • a CD-DVD laser light source and a BD laser light source are attached to the pickup support. Then, the 780 nm CD laser light or the 650 nm DVD laser light emitted from the CD-DVD laser light source passes below the first lens 241 described later through an optical path constituted by an optical system. Further, the 405 nm BD laser light emitted from the BD laser light source reaches below the second lens 242 described later.
  • a raising mirror (not shown) is disposed below each lens 241 and 242, and each laser beam is routed upward by the raising mirror and passes through each lens 241 and 242 from the bottom to the top.
  • a recording medium (not shown) is disposed above each of the lenses 241 and 242, and each of the lenses 241 and 242 collects each laser beam on the information recording surface of the recording medium.
  • the actuator base 10 includes a suspension base arrangement portion 11 having a substantially rectangular plate shape.
  • a positioning hole 12 is provided in the approximate center of the suspension base arrangement portion 11.
  • an insertion hole 13 is provided on the tracking holes T1 and T2 side of the positioning hole 12.
  • a first yoke 14 extending in the focus direction F1 is provided on the side edge of the suspension base arrangement portion 11 on the position adjustment direction P1 side.
  • the first yoke 14 is provided with a first engaging groove portion 14A as an engaged portion that extends from an end portion on the focus direction F1 side to a substantially central portion and has a bottom portion formed in a substantially V shape. .
  • two base bridging portions extending in a direction away from the second yoke 15 and the first yoke 14 are also provided. 16 are provided.
  • the second yoke 15 faces the first yoke 14 and has a shape with a slightly larger rising dimension than the first yoke 14.
  • the second yoke 15 is located on the focus direction F1 side, has a smaller dimension in the focus direction F2 than the first engagement groove portion 14A, and has a bottom portion formed in a substantially V-shape.
  • a second engaging groove portion 15A is provided as the engaged portion.
  • a base connecting portion 17 that connects the base bridging portion 16 in the extending direction is provided.
  • a third yoke 18 facing the second yoke 15 and having substantially the same shape as the second yoke 15 is provided on the side edge of the base connecting portion 17 on the suspension base arrangement portion 11 side. Yes.
  • the pickup actuator 20 includes a suspension base 21 as a support portion fixed to the suspension base arrangement portion 11 of the actuator base 10, a movable portion 24 movable with respect to the suspension base 21, and a suspension base. And an operation control unit 27 that moves the movable unit 24 with respect to 21.
  • the suspension base 21 includes a base portion 211 having a substantially rectangular tube shape.
  • the side surface of the base base 211 on the tracking direction T1, T2 side (hereinafter referred to as the base tracking side surface) has a tracking direction T1 from the position adjustment direction P1 side and the focus direction F1 side.
  • T2 and the first and second elastic holding portions 212 and 213 extending in a substantially rod shape, and the third and fourth extending in a substantially rod shape from the focus direction F2 side of the first and second elastic holding portions 212 and 213, respectively.
  • Elastic holding portions 214 and 215 are provided.
  • a rod-like portion 216 extending in the position adjustment direction P2 is provided at the tip of each of the elastic holding portions 212 to 215.
  • the base base 211 is provided with a damping agent filling portion 217 that faces the base tracking surface with a gap and is positioned between the rod-like portions 216. Further, as shown in FIG. 4, the base tracking surface is provided with a claw locking portion 218 that bulges in a substantially rectangular plate shape.
  • a first engagement protrusion 219 as an engagement portion that swells in a substantially rectangular plate shape is provided at the center of the side surface of the base base portion 211 on the position adjustment direction P1 side.
  • the first engagement protrusion 219 is set to have a dimension in the tracking direction T1 substantially equal to that of the first engagement groove 14A, and an end on the focus direction F2 side is formed in an arcuate shape.
  • the first engaging groove 14A is engaged.
  • a second engagement protrusion 220 is provided on the side surface of the base base portion 211 on the position adjustment direction P2 side as an engagement portion that bulges out into a substantially semicircular plate. .
  • the second engagement protrusion 220 is provided on the focus direction F1 side, the size of the tracking direction T1 is set to be approximately equal to that of the second engagement groove 15A, and the end on the focus direction F2 side.
  • the part is formed in a circular arc shape and is engaged with the second engagement groove 15A.
  • a flexible substrate 23 (not shown in FIG. 1) is attached to the side surface of the suspension base 21 on the position adjustment direction P1 side.
  • the movable portion 24 includes a lens holder 243 having a substantially rectangular plate shape that holds the lenses 241 and 242 in a state in which the lenses 241 and 242 are arranged in the position adjustment direction P2.
  • a pair of substrate mounting portions 244 extending in the focus direction F2 is provided on the side edge of the lens holder 243 on the position adjustment direction P1, P2 side.
  • two first fixed arms 245 extending in the tracking directions T1 and T2 are provided on the side edge of the lens holder 243 on the tracking direction T1 and T2 side.
  • two fixed connection portions 246 for connecting both of the substrate mounting portions 244 in the focus direction F2 side are provided side by side in the tracking direction T1.
  • an intermediate connection portion 247 that connects both the lens holder 243 and the both is provided.
  • a total of two second fixed arms 248 having a shape substantially equal to that of the first fixed arm 245 are respectively provided in the center of the fixed connecting portion 246.
  • a total of four third fixed arms 249 shorter than the second fixed arm 248 are provided on the position adjustment direction P1, P2 side of the second fixed arm 248, respectively.
  • the operation control unit 27 includes two magnets 271, two coil substrates 272 as coil holding units, first and second tracking suspensions 273 and 274, 3, a tracking coil connecting member 275 as a current-carrying portion, first to fourth focus suspensions 276 to 279, and first and second focus connecting members 280 and 281 are provided.
  • the two magnets 271 are formed in a substantially rectangular plate shape, and are attached to the second and third yokes 15 and 18, respectively.
  • a predetermined magnetization pattern is formed on the surface of each magnet 271 facing the coil substrate 272.
  • the coil substrate 272 is formed in a substantially rectangular plate shape, and is attached to the substrate attachment portion 244 of the movable portion 24 so as to face the magnet 271.
  • a tracking coil (not shown) as a coil
  • a first focus coil (not shown) as a first neighboring coil
  • a second (not shown) as a second neighboring coil.
  • a tracking terminal 282A connected to the tracking coil is provided on the coil substrate 272 on the focus direction F1 side.
  • a pair of focus terminals 283A and 283B connected to the respective focus coils are provided on the focus direction F2 side.
  • the tracking suspensions 273 and 274 connect the elastic holding portions 212 and 213 to the movable portion 24 and supply power to the tracking coil.
  • Each of the tracking suspensions 273 and 274 includes first and second suspension terminal portions 273A and 274A that are insert-molded in the elastic holding portions 212 and 213, respectively.
  • the first suspension terminal portion 273A includes an inner protrusion 273B and an outer protrusion 273C that protrude from the first elastic holding portion 212 in the position adjustment direction P1.
  • the first suspension terminal portion 273A is provided with a first tracking elastic portion 273D as a pair of elastic portions adjacent to the tracking direction T1 and extending substantially linearly in the position adjustment direction P2.
  • the second suspension terminal portion 274A has an inner shape that is substantially line symmetric with each of the components 273B to 273D around the tilt axis K (see FIG. 1) passing through the center of the movable portion 24 and parallel to the position adjustment direction P1.
  • a protruding portion 274B, an outer protruding portion 274C, and a second tracking elastic portion 274D as a pair of elastic portions are provided.
  • the inner protrusions 273B and 274B are fixed to the flexible substrate 23 with solder H (not shown in FIG. 1).
  • first ends of the tracking elastic portions 273D and 274D extend in the direction of approaching each other from the middle of the pair of coil substrates 272 (hereinafter referred to as substrate intermediate positions) and then extend in the position adjustment directions P1 and P2, respectively.
  • First and second tracking energization units 273E and 274E are provided as second energization units. As shown in FIG. 2, the tips of the respective tracking energization portions 273E and 274E are fixed to the coil substrate 272 on the position adjustment direction P1, P2 side by solder H (not shown in FIG. 1), and the tracking direction T1, T2 side
  • the tracking coil 282A is electrically connected to the tracking coil.
  • the tracking energizing portions 273E and 274E are insert-molded in the first fixed arm 245 at the connection portions with the tracking elastic portions 273D and 274D.
  • the tracking coil connecting member 275 is formed in a shape that is substantially point-symmetric with respect to the center of the movable portion 24 in plan view from the focus direction F1. Specifically, the tracking coil connecting member 275 is provided on the tracking direction T1, T2 side of the movable portion 24, and is formed in a substantially crank shape that approaches the center of the movable portion 24 from one end to the other end. 1 and 2nd crank parts 275A and 275B. As shown in FIG. 2, one end of each crank part 275A, 275B is fixed to the coil substrate 272 on the position adjustment direction P2, P1 side by solder H (not shown in FIG. 1), and on the tracking direction T1, T2 side. The tracking coil 282A is electrically connected to the tracking coil.
  • the other end of the first crank portion 275A is connected to the other end of the second crank portion 275B by a connection intermediate portion 275C that passes between the lenses 241 and 242 and extends in the tracking direction T2.
  • the tracking coil connecting member 275 is insert-molded into the lens holder 243 at the other end of each of the crank portions 275A and 275B and the entire connecting intermediate portion 275C.
  • the tracking energizing portions 273E and 274E of the tracking suspensions 273 and 274 and the tracking coil connecting member 275 as described above constitute a first coil connecting portion 291 that connects a pair of tracking coils in series. ing.
  • each of the focus suspensions 276 to 279 connects the elastic holding portions 214 and 215 and the movable portion 24 and supplies power to the focus coils.
  • Each of the focus suspensions 276 and 277 includes first and second suspension terminal portions 276A and 277A that are insert-molded in the third elastic holding portion 214, as shown in FIGS.
  • the first suspension terminal portion 276A includes an outer protrusion 276C having a shape substantially equal to the outer protrusion 273C of the first tracking suspension 273.
  • the second suspension terminal portion 277A includes an inner protruding portion 277B having a shape substantially equal to the inner protruding portion 273B of the first tracking suspension 273.
  • suspension terminal portions 276A and 277A are provided with first and second focus elastic portions 276D and 277D as third elastic portions facing the first tracking elastic portion 273D of the first tracking suspension 273, respectively. It has been.
  • a first focus energization unit 276E that extends from the substrate intermediate position in the order of the position adjustment direction P2, the tracking direction T1, and the position adjustment direction P2 is provided at the tip of the first focus elastic portion 276D.
  • a second focus energization portion 277E extending from the substrate intermediate position in the order of the tracking direction T1 and the position adjustment direction P1 is provided. As shown in FIG.
  • the tips of the respective focus energizing portions 276E and 277E are fixed to the coil substrate 272 on the position adjustment directions P2 and P1 side with solder H, and are connected to the first through the focus terminals 283A on the tracking direction T1 side. It is electrically connected to the focus coil.
  • the focus suspensions 278 and 279 are formed in a line-symmetric shape with respect to the focus suspensions 277 and 276 with the tilt axis K as the center. That is, the third focus suspension 278 includes a third suspension terminal portion 278A having a shape symmetrical to each of the components 277A, 277B, 277D, and 277E, an inner protrusion 278B, and a third elastic portion. A focus elastic portion 278D and a third focus energization portion 278E are provided.
  • the fourth focus suspension 279 includes a fourth suspension terminal portion 279A having a shape symmetrical to each of the configurations 276A, 276C, 276D, and 276E, an outer protrusion 279C, and a fourth elastic portion.
  • a focus elastic portion 279D and a fourth focus energization portion 279E are provided.
  • the tips of the focus energizing portions 278E and 279E are fixed to the coil substrate 272 on the position adjustment directions P1 and P2 side by solder H and electrically connected to the second focus coil via the focus terminal 283A on the tracking direction T2 side.
  • the inner protrusions 277B and 278B and the outer protrusions 276C and 279C are fixed to the flexible substrate 23 with solder H.
  • the elastic portions 273D, 274D, 276D, 277D, 278D, and 279D (hereinafter referred to as 276D to 279D) of the suspensions 273, 274, 276 to 279 are roughly divided into a rod-shaped portion 216 and a damping agent filling portion 217. It is fixed to the suspension base 21 by a damping agent (not shown) filled in the formed filling region D (see FIGS. 2 and 4).
  • the focus connection members 280 and 281 are formed in a substantially linear shape that is line-symmetric with respect to the tilt axis K. Both ends of the focus connection members 280 and 281 are fixed to the coil substrate 272 with solder H, and are electrically connected to the focus coils via the focus terminals 283B on the tracking direction T1 and T2 side. The focus connection members 280 and 281 are almost entirely insert-molded in the fixed connection portion 246.
  • the first focus coil is connected in series by the focus energization portions 276E and 277E of the focus suspensions 276 and 277 and the first focus connection member 280 as described above.
  • a second coil connection portion 292 is configured as a first neighboring coil connection portion.
  • the third energizing portions 278E and 279E of the focus suspensions 278 and 279 and the second focus connecting member 281 are used as third neighboring coil connecting portions for connecting the second focus coils in series.
  • the coil connection portion 293 is configured.
  • the movable unit 24 and the magnetic field of the magnet 271 are supplied. Due to the force generated by the above, it moves in the tracking directions T1, T2. Further, the movable portion 24 is generated by the drive current of each focus coil when a drive current is passed to each focus coil via the flexible substrate 23, the focus suspensions 276 to 279, and the focus connection members 280 and 281.
  • the force is the same in the focus direction F1 or the focus direction F2, it moves in the focus directions F1 and F2, and when the force is different between the focus direction F1 and the focus direction F2, it moves in the tilt direction C.
  • the focus direction positioning member 40 is formed in a substantially U shape as shown in FIGS. 2 to 4 and FIG. Specifically, the focus direction positioning member 40 has a substantially cross-shaped base 41. In the center of one surface of the base portion 41, a positioning bulge portion 42 that bulges in a columnar shape in the focus direction F1 and engages with the positioning hole 12 is provided. In addition, side plates 43 that extend in a substantially plate shape in the focus direction F ⁇ b> 1 and are inserted into the insertion holes 13 are provided at a pair of opposite ends of the base 41. A locking claw portion 44 that protrudes in a direction facing each other and is locked to the claw locking portion 218 is provided at the tip of the side plate portion 43.
  • These locking claws 44 include an inclined surface portion 45 that is inclined so that the distance from the opposing side plate portion 43 becomes smaller as the base portion 41 is approached. Further, an operation regulating contact portion 46 that is formed in an arcuate surface shape and makes line contact with the claw locking portion 218 is provided at the end of the locking claw portion 44 on the focus direction F2 side.
  • a tracking direction operation restricting unit 51 is configured to restrict the movement. As shown in FIG. 4, the tracking base operation restricting portion 51 and the focus direction positioning member 40 position the suspension base 21 so as to be adjustable in the position adjustment directions P1 and P2 with respect to the actuator base 10.
  • a positioning unit 50 is configured.
  • FIG. 11 is a cross-sectional view showing a method for manufacturing a suspension base.
  • the suspensions 273, 274, 276 to 279 are loaded into the mold G, and LCP (liquid crystal polymer) resin is injected from the injection hole Gh.
  • LCP liquid crystal polymer
  • the dimensions in the tracking directions T1 and T2 are the focus directions F1 and F2 and the position adjustment directions P1 and P2. It is formed smaller than the dimensions.
  • the flow direction of the LCP resin in the elastic holding portion forming regions G1 to G4 is substantially only the tracking directions T1 and T2 indicated by the arrows R1 to R4. That is, the suspension base 21 having the elastic holding portions 212 to 215 in which the flow direction of the LCP resin is substantially only the tracking directions T1, T2 is manufactured.
  • the optical pickup device 1 having the tracking elastic portions 273D and 274D for connecting the suspension base 21 and the movable portion 24, the elastic holding portions 212 extending in a substantially rod shape in the tracking directions T1 and T2, respectively. 213 is provided, and the elastic holding portions 212 and 213 hold the tracking elastic portions 273D and 274D, respectively.
  • the flow direction of the LCP resin in each of the elastic holding portions 212 and 213 can be substantially only in the tracking directions T1 and T2, and the shape of each of the elastic holding portions 212 and 213 is changed in a high or low temperature environment.
  • the shape change can be made only in the tracking directions T1 and T2. Therefore, the deformation of the elastic holding portions 212 and 213 can be made uniform regardless of the optical pickup device 1, and the variation in performance of each product can be reduced.
  • the optical pickup device 1 is provided with focus elastic portions 276D to 279D that connect the suspension base 21 and the movable portion 24.
  • the movable portion 24 is provided with elastic holding portions 214 and 215 extending in a substantially rod shape in the tracking directions T1 and T2, respectively, and the elastic holding portions 214 and 215 hold the focus elastic portions 276D to 279D. For this reason, even in a configuration having a tracking coil and a pair of focus coils and moving the movable portion 24 in the tracking directions T1, T2, the focus directions F1, F2, and the tilt direction C, each elasticity in a high or low temperature environment.
  • the shape change of the holding parts 212 and 213 can be made uniform, and the variation in performance for each product can be reduced.
  • the elastic portions 273D, 274D, 276D to 279D are insert-molded in the elastic holding portions 212 to 215, respectively.
  • the flexible printed circuit board is only fixed to the suspension wire by the solder fixing portion, and is not fixed to the suspension holder. For this reason, it is necessary to fix the suspension wire to the flexible printed circuit board that is not fixed to any member, and there is a possibility that the position accuracy of the suspension wire is lowered and the manufacturing tact time is increased.
  • the position accuracy of each of the elastic portions 273D, 274D, 276D to 279D can be increased, and the manufacturing tact can be shortened.
  • the suspensions 276 to 279, the focus coil, and the elastic holding portions 214 and 215 need not be provided. Further, the suspensions 276 to 279 may be held by the elastic holding portions 212 and 213 without providing the elastic holding portions 214 and 215, respectively. Further, the suspensions 273, 274, 276 to 279 may not be insert-molded in the elastic holding portions 212 to 215. Further, the elastic holding portions 212 to 215 may be provided so as to extend in a substantially rod shape in the focus directions F1 and F2.
  • the present invention may be applied to an optical pickup device having only one of the lenses 241 and 242.
  • the specific structure and procedure for carrying out the present invention can be appropriately changed to other structures and the like within a range in which the object of the present invention can be achieved.
  • 212 and 213 are provided, and the elastic holding portions 212 and 213 hold the tracking elastic portions 273D and 274D, respectively.
  • the flow direction of the LCP resin in each of the elastic holding portions 212 and 213 can be substantially only in the tracking directions T1 and T2, and the shape of each of the elastic holding portions 212 and 213 is changed in a high or low temperature environment.
  • the shape change can be made only in the tracking directions T1 and T2. Therefore, the deformation of the elastic holding portions 212 and 213 can be made uniform regardless of the optical pickup device 1, and the variation in performance of each product can be reduced.
  • the present invention can be used as an optical pickup device.

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  • Optical Recording Or Reproduction (AREA)

Abstract

In an optical pickup device (1) including suspensions (273, 274) which couple a suspension base (21) and a movable section (24), the movable section (24) is provided with elastic holding portions (212, 213) extending substantially in a bar shape in tracking directions (T1, T2), respectively, and the tracking suspensions (273, 274) are held by the elastic holding portions (212, 213), respectively. Thus, LCP resins in the respective elastic holding portions (212, 213) can flow almost only in the tracking directions (T1, T2), and even if the shapes of the elastic holding portions (212, 213) are changed under a high- or low-temperature environment, the shapes can be changed only in the tracking directions (T1, T2). Consequently, deformations of the elastic holding portions (212, 213) can be made uniform irrespective of the optical pickup device (1), and variations in performance between products can be reduced.

Description

光学ピックアップ装置Optical pickup device
　本発明は、光学ピックアップ装置に関する。 The present invention relates to an optical pickup device.
　従来、ＣＤ（Compact Disc）やＤＶＤ（Digital Versatile Disc）あるいはＢＤ（Blu-ray Disc）などの記録媒体に記録されている情報を記録したり、または記録されている情報を再生したりする光学ピックアップ装置が知られている。（例えば、特許文献１参照）。
　この特許文献１に記載の構成では、サスペンションワイヤは、サスペンションホルダに充填されたサスペンションホルダ凹部ダンピング材により、サスペンションホルダに弾性的に固定されている。また、サスペンションホルダには、半田固定部でサスペンションワイヤの端部に固定されたフレキシブルプリント基板が設けられている。さらに、サスペンションホルダとフレキシブルプリント基板との間には、サスペンションホルダ－フレキシブルプリント基板間ダンピング材が充填されている。
　このようなサスペンションホルダ－フレキシブルプリント基板間ダンピング材を設けることにより、サスペンションワイヤに伝わる接線方向の振動に対するＸ軸まわりのピッチング共振の吸収を良くし、Ｚ軸まわりのヨーイング共振も抑える構成が採られている。 Conventionally, an optical pickup that records information recorded on a recording medium such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a BD (Blu-ray Disc), or reproduces the recorded information. The device is known. (For example, refer to Patent Document 1).
In the configuration described in Patent Document 1, the suspension wire is elastically fixed to the suspension holder by a suspension holder recess damping material filled in the suspension holder. The suspension holder is provided with a flexible printed circuit board fixed to the end of the suspension wire by a solder fixing portion. Further, a suspension holder-flexible printed circuit board damping material is filled between the suspension holder and the flexible printed circuit board.
By providing such a damping material between the suspension holder and the flexible printed circuit board, it is possible to improve the absorption of pitching resonance around the X axis with respect to the tangential vibration transmitted to the suspension wire, and to suppress the yawing resonance around the Z axis. ing.
特開２００８－５２７６３号公報JP 2008-52763 A
　しかしながら、特許文献１のような構成では、フレキシブルプリント基板は、異方性を有しているため、高温や低温の環境下では、様々な状態の反りや歪みが生じてしまうおそれがある。このため、環境によって光学ピックアップ装置ごとに対物レンズが異なる方向に傾いてしまい、製品の性能のばらつきが大きくなるおそれがある。 However, in the configuration as in Patent Document 1, since the flexible printed circuit board has anisotropy, there is a possibility that warping and distortion in various states may occur under high and low temperature environments. For this reason, the objective lens is inclined in a different direction for each optical pickup device depending on the environment, and there is a possibility that the variation in the performance of the product becomes large.
　本発明は、製品ごとの性能のばらつきを小さくすることが可能な光学ピックアップ装置を提供することを１つの目的とする。 An object of the present invention is to provide an optical pickup device capable of reducing the variation in performance from product to product.
　本発明の光学ピックアップ装置は、ベース部材と、このベース部材に固定される支持部と、レンズを有する可動部と、前記支持部に対して前記可動部を移動させる動作制御部と、を具備し、前記動作制御部は、コイルを保持し、前記可動部に設けられたコイル保持部と、前記コイルと隙間を介して略対向する状態で前記ベース部材に設けられた磁石と、前記支持部と前記可動部とを連結するとともに前記コイルに電気的に接続された第１の弾性部および第２の弾性部と、を備え、前記コイルへの通電により発生する電磁力で前記可動部を往復移動させ、前記支持部は、トラッキング方向の両側またはフォーカス方向の両側に向かって略棒状に延びる形状に形成されて、前記第１の弾性部および前記第２の弾性部をそれぞれ保持する第１の弾性保持部および第２の弾性保持部を備えていることを特徴とする。 An optical pickup device of the present invention includes a base member, a support portion fixed to the base member, a movable portion having a lens, and an operation control portion that moves the movable portion relative to the support portion. The operation control unit holds a coil, a coil holding unit provided in the movable unit, a magnet provided in the base member in a state of being substantially opposed to the coil via a gap, and the support unit. A first elastic portion and a second elastic portion that are coupled to the movable portion and are electrically connected to the coil, and the movable portion is reciprocated by electromagnetic force generated by energizing the coil. The support portion is formed in a shape extending substantially in a rod shape toward both sides in the tracking direction or both sides in the focus direction, and holds the first elastic portion and the second elastic portion, respectively. Characterized in that it comprises a holding portion and a second elastic holding part.
本発明の一実施形態に係る光学ピックアップ装置の斜視図である。1 is a perspective view of an optical pickup device according to an embodiment of the present invention. 前記光学ピックアップ装置のフォーカス方向Ｆ１側からの平面図である。It is a top view from the focus direction F1 side of the said optical pick-up apparatus. 前記光学ピックアップ装置のフォーカス方向Ｆ２側からの平面図である。It is a top view from the focus direction F2 side of the said optical pick-up apparatus. 図２のIV－IV線に沿った断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 2. 前記光学ピックアップ装置の位置調整方向Ｐ１側からの側面図である。It is a side view from the position adjustment direction P1 side of the said optical pick-up apparatus. 図２のVI－VI線に沿った断面図である。FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 2. トラッキング端子およびフォーカス端子を示す図である。It is a figure which shows a tracking terminal and a focus terminal. 第１，第２のトラッキングサスペンションおよびトラッキングコイル接続部材を示す平面図である。It is a top view which shows the 1st, 2nd tracking suspension and a tracking coil connection member. 第１～第４のフォーカスサスペンションおよび第１，第２のフォーカス接続部材を示す平面図である。FIG. 6 is a plan view showing first to fourth focus suspensions and first and second focus connecting members. フォーカス方向位置決め部材の断面図である。It is sectional drawing of a focus direction positioning member. サスペンションベースの製造方法を示す断面図である。It is sectional drawing which shows the manufacturing method of a suspension base.
符号の説明Explanation of symbols
　　　１…光学ピックアップ装置
　　１０…ベース部材としてのアクチュエータベース
　　２１…支持部としてのサスペンションベース
　　２４…可動部
　　２７…動作制御部
　２１２，２１３，２１４，２１５…第１，第２，第３，第４の弾性保持部
　２４１，２４２…第１，第２のレンズ
　２７１…磁石
　２７２…コイル保持部としてのコイル基板
　２７３Ｄ，２７４Ｄ…第１，第２の弾性部としての第１，第２のトラッキング弾性部
　２７６Ｄ，２７７Ｄ…第３の弾性部としての第１，第２のフォーカス弾性部
　２７８Ｄ，２７９Ｄ…第４の弾性部としての第３，第４のフォーカス弾性部 DESCRIPTION OF SYMBOLS 1 ... Optical pick-up apparatus 10 ... Actuator base as a base member 21 ... Suspension base as a support part 24 ... Movable part 27 ... Operation control part 212,213,214,215 ... 1st, 2nd, 3rd, 4th Elastic holding portions 241, 242... First and second lenses 271. Magnet 272. Coil substrate as coil holding portion 273D, 274D... First and second tracking elastic portions 276D as first and second elastic portions. , 277D... First and second focus elastic portions as third elastic portions 278D, 279D... Third and fourth focus elastic portions as fourth elastic portions.
　以下、本発明の実施形態を図面に基づいて説明する。
　図１は、本発明の一実施形態に係る光学ピックアップ装置の斜視図である。図２は、光学ピックアップ装置のフォーカス方向Ｆ１側からの平面図である。図３は、光学ピックアップ装置のフォーカス方向Ｆ２側からの平面図である。図４は、図２のIV－IV線に沿った断面図である。図５は、光学ピックアップ装置の位置調整方向Ｐ１側からの側面図である。図６は、図２のVI－VI線に沿った断面図である。図７は、トラッキング端子およびフォーカス端子を示す図である。図８は、第１，第２のトラッキングサスペンションおよびトラッキングコイル接続部材を示す平面図である。図９は、第１～第４のフォーカスサスペンションおよび第１，第２のフォーカス接続部材を示す平面図である。図１０は、フォーカス方向位置決め部材の断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an optical pickup device according to an embodiment of the present invention. FIG. 2 is a plan view from the focus direction F1 side of the optical pickup device. FIG. 3 is a plan view from the focus direction F2 side of the optical pickup device. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a side view of the optical pickup device from the position adjustment direction P1 side. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a diagram showing a tracking terminal and a focus terminal. FIG. 8 is a plan view showing the first and second tracking suspensions and the tracking coil connecting member. FIG. 9 is a plan view showing the first to fourth focus suspensions and the first and second focus connection members. FIG. 10 is a cross-sectional view of the focus direction positioning member.
［光学ピックアップ装置の全体構成］
　図１および図２において、光学ピックアップ装置１は、ベース部材としてのアクチュエータベース１０と、ピックアップアクチュエータ２０と、フォーカス方向動作規制部としてのフォーカス方向位置決め部材４０と、を備えている。光学ピックアップ装置１は、例えばＣＤやＤＶＤあるいはＢＤなどの記録媒体に情報を記録、または記録された情報を再生する記録媒体駆動装置に組み込まれている。光学ピックアップ装置１は、このような記録媒体駆動装置に格納された記録媒体の情報記録面に対向する位置に、この記録媒体の径方向に移動可能に取付けられている。
　なお、以下において、記録媒体の径方向の一方側および他方側をそれぞれトラッキング方向Ｔ１，Ｔ２と、記録媒体の情報記録面と直交する方向の一方側および他方側をそれぞれフォーカス方向Ｆ１，Ｆ２と、トラッキング方向Ｔ１およびフォーカス方向Ｆ１と直交する方向の一方側および他方側をそれぞれ位置調整方向Ｐ１，Ｐ２と、称して説明する。 [Overall configuration of optical pickup device]
1 and 2, the optical pickup device 1 includes an actuator base 10 as a base member, a pickup actuator 20, and a focus direction positioning member 40 as a focus direction operation restricting portion. The optical pickup device 1 is incorporated in a recording medium driving device that records information on a recording medium such as a CD, a DVD, or a BD, or reproduces the recorded information. The optical pickup device 1 is attached to a position facing the information recording surface of a recording medium stored in such a recording medium driving device so as to be movable in the radial direction of the recording medium.
In the following, one side and the other side in the radial direction of the recording medium are tracking directions T1, T2, respectively, and one side and the other side in a direction perpendicular to the information recording surface of the recording medium are focus directions F1, F2, respectively. One side and the other side of the direction orthogonal to the tracking direction T1 and the focus direction F1 are referred to as position adjustment directions P1 and P2, respectively.
　〔アクチュエータベースの構成〕
　アクチュエータベース１０は、図示しないピックアップ支持体に取付けられている。このピックアップ支持体は、図示しない駆動機構に接続され、駆動機構の制御により光学ピックアップ装置１を記録媒体の面に沿ってトラッキング方向Ｔ１，Ｔ２へ移動させる。また、ピックアップ支持体には、図示しないＣＤ－ＤＶＤ用レーザ光源と、ＢＤ用レーザ光源とが取り付けられている。
　そして、このＣＤ－ＤＶＤ用レーザ光源から出射された７８０ｎｍのＣＤ用レーザ光または６５０ｎｍのＤＶＤ用レーザ光は、光学系により構成される光路を通って後述する第１のレンズ２４１の下方に至る。また、ＢＤ用レーザ光源から出射された４０５ｎｍのＢＤ用レーザ光は、後述する第２のレンズ２４２の下方に至る。各レンズ２４１，２４２の下方には立ち上げミラー（図示せず）が配置されており、各レーザ光は立ち上げミラーにより上方へ進路変更されて各レンズ２４１，２４２を下から上へと通過する。各レンズ２４１，２４２の上方には図示しない記録媒体が配置され、各レンズ２４１，２４２は各レーザ光を記録媒体の情報記録面に集光する。 [Configuration of actuator base]
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 1 in the tracking directions T1 and T2 along the surface of the recording medium under the control of the drive mechanism. Further, a CD-DVD laser light source and a BD laser light source (not shown) are attached to the pickup support.
Then, the 780 nm CD laser light or the 650 nm DVD laser light emitted from the CD-DVD laser light source passes below the first lens 241 described later through an optical path constituted by an optical system. Further, the 405 nm BD laser light emitted from the BD laser light source reaches below the second lens 242 described later. A raising mirror (not shown) is disposed below each lens 241 and 242, and each laser beam is routed upward by the raising mirror and passes through each lens 241 and 242 from the bottom to the top. . A recording medium (not shown) is disposed above each of the lenses 241 and 242, and each of the lenses 241 and 242 collects each laser beam on the information recording surface of the recording medium.
　アクチュエータベース１０は、図３に示すように、略矩形板状のサスペンションベース配置部１１を備えている。このサスペンションベース配置部１１の略中央には、図４に示すように、位置決め孔１２が設けられている。さらに、この位置決め孔１２のトラッキング方向Ｔ１，Ｔ２側には、挿入孔１３が設けられている。また、図５にも示すように、サスペンションベース配置部１１の位置調整方向Ｐ１側の側縁には、フォーカス方向Ｆ１に延びる第１のヨーク１４が設けられている。この第１のヨーク１４には、フォーカス方向Ｆ１側の端部から略中央にかけて延び、底部が略Ｖ字状に形成された被係合部としての第１の係合溝部１４Ａが設けられている。
　さらに、サスペンションベース配置部１１の位置調整方向Ｐ２側の側縁には、図１にも示すように、第２のヨーク１５と、第１のヨーク１４と離れる方向に延びる２個のベース架橋部１６と、が設けられている。第２のヨーク１５は、第１のヨーク１４と対向し、かつ、第１のヨーク１４よりも若干立ち上がり寸法が大きい形状を有している。また、第２のヨーク１５には、図６に示すように、フォーカス方向Ｆ１側に位置し、第１の係合溝部１４Ａよりもフォーカス方向Ｆ２の寸法が小さくかつ底部が略Ｖ字状に形成された被係合部としての第２の係合溝部１５Ａが設けられている。
　また、ベース架橋部１６の延出方向の先端には、両者を連結するベース連結部１７が設けられている。そして、ベース連結部１７のサスペンションベース配置部１１側の側縁には、第２のヨーク１５と対向し、かつ、第２のヨーク１５と略等しい形状を有する第３のヨーク１８が設けられている。 As shown in FIG. 3, the actuator base 10 includes a suspension base arrangement portion 11 having a substantially rectangular plate shape. As shown in FIG. 4, a positioning hole 12 is provided in the approximate center of the suspension base arrangement portion 11. Further, an insertion hole 13 is provided on the tracking holes T1 and T2 side of the positioning hole 12. Also, as shown in FIG. 5, a first yoke 14 extending in the focus direction F1 is provided on the side edge of the suspension base arrangement portion 11 on the position adjustment direction P1 side. The first yoke 14 is provided with a first engaging groove portion 14A as an engaged portion that extends from an end portion on the focus direction F1 side to a substantially central portion and has a bottom portion formed in a substantially V shape. .
Further, at the side edge of the suspension base arrangement portion 11 on the position adjustment direction P2 side, as shown in FIG. 1, two base bridging portions extending in a direction away from the second yoke 15 and the first yoke 14 are also provided. 16 are provided. The second yoke 15 faces the first yoke 14 and has a shape with a slightly larger rising dimension than the first yoke 14. Further, as shown in FIG. 6, the second yoke 15 is located on the focus direction F1 side, has a smaller dimension in the focus direction F2 than the first engagement groove portion 14A, and has a bottom portion formed in a substantially V-shape. A second engaging groove portion 15A is provided as the engaged portion.
In addition, a base connecting portion 17 that connects the base bridging portion 16 in the extending direction is provided. A third yoke 18 facing the second yoke 15 and having substantially the same shape as the second yoke 15 is provided on the side edge of the base connecting portion 17 on the suspension base arrangement portion 11 side. Yes.
　〔ピックアップアクチュエータの構成〕
　ピックアップアクチュエータ２０は、図１に示すように、アクチュエータベース１０のサスペンションベース配置部１１に固定される支持部としてのサスペンションベース２１と、サスペンションベース２１に対して移動可能な可動部２４と、サスペンションベース２１に対して可動部２４を移動させる動作制御部２７と、を備えている。 [Configuration of pickup actuator]
As shown in FIG. 1, the pickup actuator 20 includes a suspension base 21 as a support portion fixed to the suspension base arrangement portion 11 of the actuator base 10, a movable portion 24 movable with respect to the suspension base 21, and a suspension base. And an operation control unit 27 that moves the movable unit 24 with respect to 21.
　サスペンションベース２１は、略四角筒状のベース基部２１１を備えている。このベース基部２１１のトラッキング方向Ｔ１，Ｔ２側の側面（以下、ベーストラッキング側面と称す）には、図２および図５にも示すように、位置調整方向Ｐ１側かつフォーカス方向Ｆ１側からトラッキング方向Ｔ１，Ｔ２にそれぞれ略棒状に延びる第１，第２の弾性保持部２１２，２１３と、これら第１，第２の弾性保持部２１２，２１３のフォーカス方向Ｆ２側から略棒状に延びる第３，第４の弾性保持部２１４，２１５と、が設けられている。各弾性保持部２１２～２１５の先端には、位置調整方向Ｐ２に延びる棒状部２１６が設けられている。また、ベース基部２１１には、ベーストラッキング面に隙間を介して対向し、かつ、棒状部２１６の間に位置するダンピング剤充填部２１７が設けられている。
　また、ベーストラッキング面には、図４にも示すように、略長方形板状に膨出する爪係止部２１８が設けられている。 The suspension base 21 includes a base portion 211 having a substantially rectangular tube shape. As shown in FIGS. 2 and 5, the side surface of the base base 211 on the tracking direction T1, T2 side (hereinafter referred to as the base tracking side surface) has a tracking direction T1 from the position adjustment direction P1 side and the focus direction F1 side. , T2 and the first and second elastic holding portions 212 and 213 extending in a substantially rod shape, and the third and fourth extending in a substantially rod shape from the focus direction F2 side of the first and second elastic holding portions 212 and 213, respectively. Elastic holding portions 214 and 215 are provided. A rod-like portion 216 extending in the position adjustment direction P2 is provided at the tip of each of the elastic holding portions 212 to 215. The base base 211 is provided with a damping agent filling portion 217 that faces the base tracking surface with a gap and is positioned between the rod-like portions 216.
Further, as shown in FIG. 4, the base tracking surface is provided with a claw locking portion 218 that bulges in a substantially rectangular plate shape.
　さらに、ベース基部２１１の位置調整方向Ｐ１側の側面の中央には、略長方形板状に膨出する係合部としての第１の係合突出部２１９が設けられている。この第１の係合突出部２１９は、トラッキング方向Ｔ１の寸法が第１の係合溝部１４Ａと略等しい大きさに設定されているとともに、フォーカス方向Ｆ２側の端部が円弧面状に形成され、第１の係合溝部１４Ａに係合している。
　また、ベース基部２１１の位置調整方向Ｐ２側の側面には、図６にも示すように、略半円板に膨出する係合部としての第２の係合突出部２２０が設けられている。この第２の係合突出部２２０は、フォーカス方向Ｆ１側に設けられ、トラッキング方向Ｔ１の寸法が第２の係合溝部１５Ａと略等しい大きさに設定されているとともに、フォーカス方向Ｆ２側の端部が円弧面状に形成され、第２の係合溝部１５Ａに係合している。
　また、サスペンションベース２１における位置調整方向Ｐ１側の側面には、フレキシブル基板２３（図１では図示せず）が取り付けられている。 Furthermore, a first engagement protrusion 219 as an engagement portion that swells in a substantially rectangular plate shape is provided at the center of the side surface of the base base portion 211 on the position adjustment direction P1 side. The first engagement protrusion 219 is set to have a dimension in the tracking direction T1 substantially equal to that of the first engagement groove 14A, and an end on the focus direction F2 side is formed in an arcuate shape. The first engaging groove 14A is engaged.
Further, as shown in FIG. 6, a second engagement protrusion 220 is provided on the side surface of the base base portion 211 on the position adjustment direction P2 side as an engagement portion that bulges out into a substantially semicircular plate. . The second engagement protrusion 220 is provided on the focus direction F1 side, the size of the tracking direction T1 is set to be approximately equal to that of the second engagement groove 15A, and the end on the focus direction F2 side. The part is formed in a circular arc shape and is engaged with the second engagement groove 15A.
A flexible substrate 23 (not shown in FIG. 1) is attached to the side surface of the suspension base 21 on the position adjustment direction P1 side.
　可動部２４は、図１および図２に示すように、各レンズ２４１，２４２を位置調整方向Ｐ２に並べた状態で保持する略長方形板状のレンズホルダ２４３を備えている。このレンズホルダ２４３の位置調整方向Ｐ１，Ｐ２側の側縁には、フォーカス方向Ｆ２に延びる一対の基板取付部２４４が設けられている。また、レンズホルダ２４３のトラッキング方向Ｔ１，Ｔ２側の側縁には、トラッキング方向Ｔ１，Ｔ２に延びる２個の第１の固定アーム２４５が設けられている。
　また、一対の基板取付部２４４のフォーカス方向Ｆ２側の端部には、図３に示すように、両者を連結する２個の固定連結部２４６がトラッキング方向Ｔ１に並んで設けられている。これらの固定連結部２４６の中央には、この両者とレンズホルダ２４３とを連結する中間連結部２４７が設けられている。また、固定連結部２４６の中央には、第１の固定アーム２４５と略等しい形状を有する合計２個の第２の固定アーム２４８がそれぞれ設けられている。さらに、第２の固定アーム２４８の位置調整方向Ｐ１，Ｐ２側には、第２の固定アーム２４８よりも短い合計４個の第３の固定アーム２４９がそれぞれ設けられている。 As shown in FIGS. 1 and 2, the movable portion 24 includes a lens holder 243 having a substantially rectangular plate shape that holds the lenses 241 and 242 in a state in which the lenses 241 and 242 are arranged in the position adjustment direction P2. A pair of substrate mounting portions 244 extending in the focus direction F2 is provided on the side edge of the lens holder 243 on the position adjustment direction P1, P2 side. Further, two first fixed arms 245 extending in the tracking directions T1 and T2 are provided on the side edge of the lens holder 243 on the tracking direction T1 and T2 side.
Further, as shown in FIG. 3, two fixed connection portions 246 for connecting both of the substrate mounting portions 244 in the focus direction F2 side are provided side by side in the tracking direction T1. At the center of these fixed connection portions 246, an intermediate connection portion 247 that connects both the lens holder 243 and the both is provided. In addition, a total of two second fixed arms 248 having a shape substantially equal to that of the first fixed arm 245 are respectively provided in the center of the fixed connecting portion 246. Further, a total of four third fixed arms 249 shorter than the second fixed arm 248 are provided on the position adjustment direction P1, P2 side of the second fixed arm 248, respectively.
　動作制御部２７は、図１～図３に示すように、２個の磁石２７１と、コイル保持部としての２個のコイル基板２７２と、第１，第２のトラッキングサスペンション２７３，２７４と、第３の通電部としてのトラッキングコイル接続部材２７５と、第１～第４のフォーカスサスペンション２７６～２７９と、第１，第２のフォーカス接続部材２８０，２８１と、を備えている。
　２個の磁石２７１は、略長方形板状に形成されており、第２，第３のヨーク１５，１８にそれぞれ取り付けられている。各磁石２７１におけるコイル基板２７２に対向する面には、所定の着磁パターンが形成されている。 As shown in FIGS. 1 to 3, the operation control unit 27 includes two magnets 271, two coil substrates 272 as coil holding units, first and second tracking suspensions 273 and 274, 3, a tracking coil connecting member 275 as a current-carrying portion, first to fourth focus suspensions 276 to 279, and first and second focus connecting members 280 and 281 are provided.
The two magnets 271 are formed in a substantially rectangular plate shape, and are attached to the second and third yokes 15 and 18, respectively. A predetermined magnetization pattern is formed on the surface of each magnet 271 facing the coil substrate 272.
　コイル基板２７２は、略長方形板状に形成されており、磁石２７１に対向するように、可動部２４の基板取付部２４４にそれぞれ取り付けられている。コイル基板２７２の磁石２７１と対向する面には、コイルとしての図示しないトラッキングコイルと、第１の近傍コイルとしての図示しない第１のフォーカスコイルと、第２の近傍コイルとしての図示しない第２のフォーカスコイルと、が設けられている。
　また、コイル基板２７２におけるフォーカス方向Ｆ１側には、トラッキングコイルに接続されたトラッキング端子２８２Ａがそれぞれ設けられている。さらに、フォーカス方向Ｆ２側には、各フォーカスコイルに接続された一対のフォーカス端子２８３Ａ，２８３Ｂがそれぞれ設けられている。 The coil substrate 272 is formed in a substantially rectangular plate shape, and is attached to the substrate attachment portion 244 of the movable portion 24 so as to face the magnet 271. On the surface of the coil substrate 272 facing the magnet 271, there are a tracking coil (not shown) as a coil, a first focus coil (not shown) as a first neighboring coil, and a second (not shown) as a second neighboring coil. A focus coil.
A tracking terminal 282A connected to the tracking coil is provided on the coil substrate 272 on the focus direction F1 side. Further, a pair of focus terminals 283A and 283B connected to the respective focus coils are provided on the focus direction F2 side.
　各トラッキングサスペンション２７３，２７４は、図５および図８にも示すように、各弾性保持部２１２，２１３と可動部２４とを連結するとともに、トラッキングコイルに電力を供給する。各トラッキングサスペンション２７３，２７４は、各弾性保持部２１２，２１３にインサート成形された第１，第２のサスペンション端子部２７３Ａ，２７４Ａを備えている。第１のサスペンション端子部２７３Ａは、第１の弾性保持部２１２から位置調整方向Ｐ１に突出する内側突出部２７３Ｂおよび外側突出部２７３Ｃを備えている。また、第１のサスペンション端子部２７３Ａには、トラッキング方向Ｔ１に隣接し位置調整方向Ｐ２に略線状に延びる一対の弾性部としての第１のトラッキング弾性部２７３Ｄが設けられている。第２のサスペンション端子部２７４Ａには、可動部２４の中心を通り位置調整方向Ｐ１と平行なチルト軸Ｋ（図１参照）を中心にして各構成２７３Ｂ～２７３Ｄと略線対称な形状を有する内側突出部２７４Ｂと、外側突出部２７４Ｃと、一対の弾性部としての第２のトラッキング弾性部２７４Ｄと、が設けられている。
　そして、内側突出部２７３Ｂ，２７４Ｂは、フレキシブル基板２３に半田Ｈ（図１では図示せず）で固定されている。
　また、各トラッキング弾性部２７３Ｄ，２７４Ｄの先端には、一対のコイル基板２７２の中間（以下、基板中間位置と称す）から互いに近づく方向に延びた後に位置調整方向Ｐ１，Ｐ２にそれぞれ延びる第１，第２の通電部としての第１，第２のトラッキング通電部２７３Ｅ，２７４Ｅが設けられている。各トラッキング通電部２７３Ｅ，２７４Ｅの先端は、図２に示すように、位置調整方向Ｐ１，Ｐ２側のコイル基板２７２に半田Ｈ（図１では図示せず）で固定され、トラッキング方向Ｔ１，Ｔ２側のトラッキング端子２８２Ａを介してトラッキングコイルに電気的に接続されている。そして、各トラッキング通電部２７３Ｅ，２７４Ｅは、各トラッキング弾性部２７３Ｄ，２７４Ｄとの接続部分が第１の固定アーム２４５にインサート成形されている。 As shown in FIGS. 5 and 8, the tracking suspensions 273 and 274 connect the elastic holding portions 212 and 213 to the movable portion 24 and supply power to the tracking coil. Each of the tracking suspensions 273 and 274 includes first and second suspension terminal portions 273A and 274A that are insert-molded in the elastic holding portions 212 and 213, respectively. The first suspension terminal portion 273A includes an inner protrusion 273B and an outer protrusion 273C that protrude from the first elastic holding portion 212 in the position adjustment direction P1. Further, the first suspension terminal portion 273A is provided with a first tracking elastic portion 273D as a pair of elastic portions adjacent to the tracking direction T1 and extending substantially linearly in the position adjustment direction P2. The second suspension terminal portion 274A has an inner shape that is substantially line symmetric with each of the components 273B to 273D around the tilt axis K (see FIG. 1) passing through the center of the movable portion 24 and parallel to the position adjustment direction P1. A protruding portion 274B, an outer protruding portion 274C, and a second tracking elastic portion 274D as a pair of elastic portions are provided.
The inner protrusions 273B and 274B are fixed to the flexible substrate 23 with solder H (not shown in FIG. 1).
Further, the first ends of the tracking elastic portions 273D and 274D extend in the direction of approaching each other from the middle of the pair of coil substrates 272 (hereinafter referred to as substrate intermediate positions) and then extend in the position adjustment directions P1 and P2, respectively. First and second tracking energization units 273E and 274E are provided as second energization units. As shown in FIG. 2, the tips of the respective tracking energization portions 273E and 274E are fixed to the coil substrate 272 on the position adjustment direction P1, P2 side by solder H (not shown in FIG. 1), and the tracking direction T1, T2 side The tracking coil 282A is electrically connected to the tracking coil. The tracking energizing portions 273E and 274E are insert-molded in the first fixed arm 245 at the connection portions with the tracking elastic portions 273D and 274D.
　トラッキングコイル接続部材２７５は、図８に示すように、フォーカス方向Ｆ１からの平面視で可動部２４の中心に対して略点対称な形状に形成されている。
　具体的には、トラッキングコイル接続部材２７５は、可動部２４のトラッキング方向Ｔ１，Ｔ２側にそれぞれ設けられ、一端から他端に向かうにしたがって可動部２４の中央に近づく略クランク状に形成された第１，第２のクランク部２７５Ａ，２７５Ｂを有している。各クランク部２７５Ａ，２７５Ｂの一端は、図２に示すように、位置調整方向Ｐ２，Ｐ１側のコイル基板２７２に半田Ｈ（図１では図示せず）で固定され、トラッキング方向Ｔ１，Ｔ２側のトラッキング端子２８２Ａを介してトラッキングコイルに電気的に接続されている。第１のクランク部２７５Ａの他端は、各レンズ２４１，２４２の間を通りかつトラッキング方向Ｔ２に延びる接続中間部２７５Ｃにより、第２のクランク部２７５Ｂの他端に連結されている。
　また、トラッキングコイル接続部材２７５は、各クランク部２７５Ａ，２７５Ｂの他端側と、接続中間部２７５Ｃの全体とがレンズホルダ２４３にインサート成形されている。
　そして、上述したような各トラッキングサスペンション２７３，２７４の各トラッキング通電部２７３Ｅ，２７４Ｅと、トラッキングコイル接続部材２７５と、により、一対のトラッキングコイルを直列に接続する第１のコイル接続部２９１が構成されている。 As shown in FIG. 8, the tracking coil connecting member 275 is formed in a shape that is substantially point-symmetric with respect to the center of the movable portion 24 in plan view from the focus direction F1.
Specifically, the tracking coil connecting member 275 is provided on the tracking direction T1, T2 side of the movable portion 24, and is formed in a substantially crank shape that approaches the center of the movable portion 24 from one end to the other end. 1 and 2nd crank parts 275A and 275B. As shown in FIG. 2, one end of each crank part 275A, 275B is fixed to the coil substrate 272 on the position adjustment direction P2, P1 side by solder H (not shown in FIG. 1), and on the tracking direction T1, T2 side. The tracking coil 282A is electrically connected to the tracking coil. The other end of the first crank portion 275A is connected to the other end of the second crank portion 275B by a connection intermediate portion 275C that passes between the lenses 241 and 242 and extends in the tracking direction T2.
The tracking coil connecting member 275 is insert-molded into the lens holder 243 at the other end of each of the crank portions 275A and 275B and the entire connecting intermediate portion 275C.
The tracking energizing portions 273E and 274E of the tracking suspensions 273 and 274 and the tracking coil connecting member 275 as described above constitute a first coil connecting portion 291 that connects a pair of tracking coils in series. ing.
　各フォーカスサスペンション２７６～２７９は、図３に示すように、各弾性保持部２１４，２１５と可動部２４とを連結するとともに、各フォーカスコイルに電力を供給する。
　各フォーカスサスペンション２７６，２７７は、図５および図９にも示すように、第３の弾性保持部２１４にインサート成形された第１，第２のサスペンション端子部２７６Ａ，２７７Ａを備えている。第１のサスペンション端子部２７６Ａは、第１のトラッキングサスペンション２７３の外側突出部２７３Ｃと略等しい形状の外側突出部２７６Ｃを備えている。また、第２のサスペンション端子部２７７Ａは、第１のトラッキングサスペンション２７３の内側突出部２７３Ｂと略等しい形状の内側突出部２７７Ｂを備えている。さらに、各サスペンション端子部２７６Ａ，２７７Ａには、第１のトラッキングサスペンション２７３の第１のトラッキング弾性部２７３Ｄと対向する第３の弾性部としての第１，第２のフォーカス弾性部２７６Ｄ，２７７Ｄが設けられている。
　また、第１のフォーカス弾性部２７６Ｄの先端には、基板中間位置から位置調整方向Ｐ２、トラッキング方向Ｔ１、位置調整方向Ｐ２の順に延びる第１のフォーカス通電部２７６Ｅが設けられている。第２のフォーカス弾性部２７７Ｄの先端には、基板中間位置からトラッキング方向Ｔ１、位置調整方向Ｐ１の順に延びる第２のフォーカス通電部２７７Ｅが設けられている。各フォーカス通電部２７６Ｅ，２７７Ｅの先端は、図３に示すように、位置調整方向Ｐ２，Ｐ１側のコイル基板２７２に半田Ｈで固定され、トラッキング方向Ｔ１側のフォーカス端子２８３Ａを介して第１のフォーカスコイルに電気的に接続されている。 As shown in FIG. 3, each of the focus suspensions 276 to 279 connects the elastic holding portions 214 and 215 and the movable portion 24 and supplies power to the focus coils.
Each of the focus suspensions 276 and 277 includes first and second suspension terminal portions 276A and 277A that are insert-molded in the third elastic holding portion 214, as shown in FIGS. The first suspension terminal portion 276A includes an outer protrusion 276C having a shape substantially equal to the outer protrusion 273C of the first tracking suspension 273. The second suspension terminal portion 277A includes an inner protruding portion 277B having a shape substantially equal to the inner protruding portion 273B of the first tracking suspension 273. Further, the suspension terminal portions 276A and 277A are provided with first and second focus elastic portions 276D and 277D as third elastic portions facing the first tracking elastic portion 273D of the first tracking suspension 273, respectively. It has been.
In addition, a first focus energization unit 276E that extends from the substrate intermediate position in the order of the position adjustment direction P2, the tracking direction T1, and the position adjustment direction P2 is provided at the tip of the first focus elastic portion 276D. At the tip of the second focus elastic portion 277D, a second focus energization portion 277E extending from the substrate intermediate position in the order of the tracking direction T1 and the position adjustment direction P1 is provided. As shown in FIG. 3, the tips of the respective focus energizing portions 276E and 277E are fixed to the coil substrate 272 on the position adjustment directions P2 and P1 side with solder H, and are connected to the first through the focus terminals 283A on the tracking direction T1 side. It is electrically connected to the focus coil.
　各フォーカスサスペンション２７８，２７９は、チルト軸Ｋを中心にして、各フォーカスサスペンション２７７，２７６と線対称な形状に形成されている。つまり、第３のフォーカスサスペンション２７８は、各構成２７７Ａ，２７７Ｂ，２７７Ｄ，２７７Ｅと対称な形状を有する第３のサスペンション端子部２７８Ａと、内側突出部２７８Ｂと、第４の弾性部としての第３のフォーカス弾性部２７８Ｄと、第３のフォーカス通電部２７８Ｅと、を備えている。また、第４のフォーカスサスペンション２７９は、各構成２７６Ａ，２７６Ｃ，２７６Ｄ，２７６Ｅと対称な形状を有する第４のサスペンション端子部２７９Ａと、外側突出部２７９Ｃと、第４の弾性部としての第４のフォーカス弾性部２７９Ｄと、第４のフォーカス通電部２７９Ｅと、を備えている。各フォーカス通電部２７８Ｅ，２７９Ｅの先端は、位置調整方向Ｐ１，Ｐ２側のコイル基板２７２に半田Ｈで固定され、トラッキング方向Ｔ２側のフォーカス端子２８３Ａを介して第２のフォーカスコイルに電気的に接続されている。また、内側突出部２７７Ｂ，２７８Ｂと、外側突出部２７６Ｃ，２７９Ｃと、は、フレキシブル基板２３に半田Ｈで固定されている。
　そして、各サスペンション２７３，２７４，２７６～２７９の各弾性部２７３Ｄ，２７４Ｄ，２７６Ｄ，２７７Ｄ，２７８Ｄ，２７９Ｄ（以下、２７６Ｄ～２７９Ｄと称す）は、棒状部２１６とダンピング剤充填部２１７とで略区画形成された充填領域Ｄ（図２および図４参照）に充填された図示しないダンピング剤により、サスペンションベース２１に固定されている。 The focus suspensions 278 and 279 are formed in a line-symmetric shape with respect to the focus suspensions 277 and 276 with the tilt axis K as the center. That is, the third focus suspension 278 includes a third suspension terminal portion 278A having a shape symmetrical to each of the components 277A, 277B, 277D, and 277E, an inner protrusion 278B, and a third elastic portion. A focus elastic portion 278D and a third focus energization portion 278E are provided. The fourth focus suspension 279 includes a fourth suspension terminal portion 279A having a shape symmetrical to each of the configurations 276A, 276C, 276D, and 276E, an outer protrusion 279C, and a fourth elastic portion. A focus elastic portion 279D and a fourth focus energization portion 279E are provided. The tips of the focus energizing portions 278E and 279E are fixed to the coil substrate 272 on the position adjustment directions P1 and P2 side by solder H and electrically connected to the second focus coil via the focus terminal 283A on the tracking direction T2 side. Has been. The inner protrusions 277B and 278B and the outer protrusions 276C and 279C are fixed to the flexible substrate 23 with solder H.
The elastic portions 273D, 274D, 276D, 277D, 278D, and 279D (hereinafter referred to as 276D to 279D) of the suspensions 273, 274, 276 to 279 are roughly divided into a rod-shaped portion 216 and a damping agent filling portion 217. It is fixed to the suspension base 21 by a damping agent (not shown) filled in the formed filling region D (see FIGS. 2 and 4).
　各フォーカス接続部材２８０，２８１は、チルト軸Ｋを中心にして線対称な略線状に形成されている。各フォーカス接続部材２８０，２８１は、両端がコイル基板２７２に半田Ｈで固定され、トラッキング方向Ｔ１，Ｔ２側のフォーカス端子２８３Ｂを介して各フォーカスコイルに電気的に接続されている。
　また、各フォーカス接続部材２８０，２８１は、略全体が固定連結部２４６にインサート成形されている。 The focus connection members 280 and 281 are formed in a substantially linear shape that is line-symmetric with respect to the tilt axis K. Both ends of the focus connection members 280 and 281 are fixed to the coil substrate 272 with solder H, and are electrically connected to the focus coils via the focus terminals 283B on the tracking direction T1 and T2 side.
The focus connection members 280 and 281 are almost entirely insert-molded in the fixed connection portion 246.
　そして、図９に示すように、上述したような各フォーカスサスペンション２７６，２７７の各フォーカス通電部２７６Ｅ，２７７Ｅと、第１のフォーカス接続部材２８０と、により、第１のフォーカスコイルを直列に接続する第１の近傍コイル接続部としての第２のコイル接続部２９２が構成されている。また、各フォーカスサスペンション２７８，２７９の各フォーカス通電部２７８Ｅ，２７９Ｅと、第２のフォーカス接続部材２８１と、により、第２のフォーカスコイルを直列に接続する第２の近傍コイル接続部としての第３のコイル接続部２９３が構成されている。 As shown in FIG. 9, the first focus coil is connected in series by the focus energization portions 276E and 277E of the focus suspensions 276 and 277 and the first focus connection member 280 as described above. A second coil connection portion 292 is configured as a first neighboring coil connection portion. Further, the third energizing portions 278E and 279E of the focus suspensions 278 and 279 and the second focus connecting member 281 are used as third neighboring coil connecting portions for connecting the second focus coils in series. The coil connection portion 293 is configured.
　そして、可動部２４は、フレキシブル基板２３、各トラッキングサスペンション２７３，２７４、および、トラッキングコイル接続部材２７５を介して、トラッキングコイルに駆動電流が通電されると、トラッキングコイル内の電流と磁石２７１の磁界とにより生じる力により、トラッキング方向Ｔ１，Ｔ２に移動する。また、可動部２４は、フレキシブル基板２３、各フォーカスサスペンション２７６～２７９、および、各フォーカス接続部材２８０，２８１を介して、各フォーカスコイルに駆動電流が通電されて、各フォーカスコイルの駆動電流により生じる力がフォーカス方向Ｆ１またはフォーカス方向Ｆ２で同じ場合にフォーカス方向Ｆ１，Ｆ２に移動し、フォーカス方向Ｆ１とフォーカス方向Ｆ２とで異なる場合にチルト方向Ｃに移動する。 When the drive current is supplied to the tracking coil via the flexible substrate 23, the tracking suspensions 273 and 274, and the tracking coil connecting member 275, the movable unit 24 and the magnetic field of the magnet 271 are supplied. Due to the force generated by the above, it moves in the tracking directions T1, T2. Further, the movable portion 24 is generated by the drive current of each focus coil when a drive current is passed to each focus coil via the flexible substrate 23, the focus suspensions 276 to 279, and the focus connection members 280 and 281. When the force is the same in the focus direction F1 or the focus direction F2, it moves in the focus directions F1 and F2, and when the force is different between the focus direction F1 and the focus direction F2, it moves in the tilt direction C.
　フォーカス方向位置決め部材４０は、図２～図４、および、図１０に示すように、略コ字状に形成されている。具体的には、フォーカス方向位置決め部材４０は、略十字板状の基部４１を有している。この基部４１の一面の中央には、フォーカス方向Ｆ１に円柱状に膨出し、位置決め孔１２に係合する位置決め膨出部４２が設けられている。また、基部４１の対向する一対の端部には、フォーカス方向Ｆ１に略板状に延びて挿入孔１３に挿入される側板部４３が設けられている。そして、この側板部４３の先端には、互いに対向する方向に突出して、爪係止部２１８に係止される係止爪部４４が設けられている。これらの係止爪部４４は、基部４１に近づくにしたがって対向する側板部４３との間隔が小さくなるように傾斜する傾斜面部４５を備えている。また、係止爪部４４のフォーカス方向Ｆ２側の端部には、円弧面状に形成されて爪係止部２１８と線接触する動作規制接触部４６が設けられている。 The focus direction positioning member 40 is formed in a substantially U shape as shown in FIGS. 2 to 4 and FIG. Specifically, the focus direction positioning member 40 has a substantially cross-shaped base 41. In the center of one surface of the base portion 41, a positioning bulge portion 42 that bulges in a columnar shape in the focus direction F1 and engages with the positioning hole 12 is provided. In addition, side plates 43 that extend in a substantially plate shape in the focus direction F <b> 1 and are inserted into the insertion holes 13 are provided at a pair of opposite ends of the base 41. A locking claw portion 44 that protrudes in a direction facing each other and is locked to the claw locking portion 218 is provided at the tip of the side plate portion 43. These locking claws 44 include an inclined surface portion 45 that is inclined so that the distance from the opposing side plate portion 43 becomes smaller as the base portion 41 is approached. Further, an operation regulating contact portion 46 that is formed in an arcuate surface shape and makes line contact with the claw locking portion 218 is provided at the end of the locking claw portion 44 on the focus direction F2 side.
　ここで、図５および図６に示すように、各係合溝部１４Ａ，１５Ａと、各係合突出部２１９，２２０と、により、アクチュエータベース１０に対するサスペンションベース２１のトラッキング方向Ｔ１，Ｔ２への動きを規制するトラッキング方向動作規制部５１が構成されている。そして、図４にも示すように、このトラッキング方向動作規制部５１と、フォーカス方向位置決め部材４０と、により、アクチュエータベース１０に対してサスペンションベース２１を位置調整方向Ｐ１，Ｐ２へ調整可能に位置決めする位置決め部５０が構成されている。 Here, as shown in FIGS. 5 and 6, the suspension grooves 21 </ b> A and 15 </ b> A and the engagement protrusions 219 and 220 cause the suspension base 21 to move in the tracking directions T <b> 1 and T <b> 2 with respect to the actuator base 10. A tracking direction operation restricting unit 51 is configured to restrict the movement. As shown in FIG. 4, the tracking base operation restricting portion 51 and the focus direction positioning member 40 position the suspension base 21 so as to be adjustable in the position adjustment directions P1 and P2 with respect to the actuator base 10. A positioning unit 50 is configured.
［サスペンションベースの製造方法］
　次に、サスペンションベース２１の製造方法について説明する。図１１は、サスペンションベースの製造方法を示す断面図である。
　図１１に示すように、金型Ｇ内に各サスペンション２７３，２７４，２７６～２７９を装填し、注入孔ＧｈからＬＣＰ（液晶ポリマ）樹脂を注入する。ここで、略棒状の各弾性保持部２１２～２１５を形成するための弾性保持部形成領域Ｇ１～Ｇ４は、トラッキング方向Ｔ１，Ｔ２の寸法がフォーカス方向Ｆ１，Ｆ２方向および位置調整方向Ｐ１，Ｐ２の寸法と比べて小さく形成されている。このため、弾性保持部形成領域Ｇ１～Ｇ４内でのＬＣＰ樹脂の流動方向は、ほぼ、矢印Ｒ１～Ｒ４で示すトラッキング方向Ｔ１，Ｔ２のみとなる。つまり、ＬＣＰ樹脂の流動方向がほぼトラッキング方向Ｔ１，Ｔ２のみの各弾性保持部２１２～２１５を有するサスペンションベース２１が製造される。 [Suspension base manufacturing method]
Next, a method for manufacturing the suspension base 21 will be described. FIG. 11 is a cross-sectional view showing a method for manufacturing a suspension base.
As shown in FIG. 11, the suspensions 273, 274, 276 to 279 are loaded into the mold G, and LCP (liquid crystal polymer) resin is injected from the injection hole Gh. Here, in the elastic holding portion forming regions G1 to G4 for forming the substantially rod-like elastic holding portions 212 to 215, the dimensions in the tracking directions T1 and T2 are the focus directions F1 and F2 and the position adjustment directions P1 and P2. It is formed smaller than the dimensions. For this reason, the flow direction of the LCP resin in the elastic holding portion forming regions G1 to G4 is substantially only the tracking directions T1 and T2 indicated by the arrows R1 to R4. That is, the suspension base 21 having the elastic holding portions 212 to 215 in which the flow direction of the LCP resin is substantially only the tracking directions T1, T2 is manufactured.
［光学ピックアップ装置の作用効果］
　以上の光学ピックアップ装置１によれば、以下の作用効果が期待できる。
　（１）サスペンションベース２１と可動部２４とを連結する各トラッキング弾性部２７３Ｄ，２７４Ｄを有する光学ピックアップ装置１において、可動部２４にトラッキング方向Ｔ１，Ｔ２にそれぞれ略棒状に延びる各弾性保持部２１２，２１３を設け、この各弾性保持部２１２，２１３に各トラッキング弾性部２７３Ｄ，２７４Ｄを保持させている。
　このため、各弾性保持部２１２，２１３におけるＬＣＰ樹脂の流動方向をほぼトラッキング方向Ｔ１，Ｔ２のみにすることができ、高温や低温の環境下において各弾性保持部２１２，２１３の形状が変化したとしても、その形状変化をトラッキング方向Ｔ１，Ｔ２のみにすることができる。したがって、光学ピックアップ装置１によらず各弾性保持部２１２，２１３の変形を一様にでき、製品ごとの性能のばらつきを小さくできる。 [Function and effect of optical pickup device]
According to the optical pickup device 1 described above, the following effects can be expected.
(1) In the optical pickup device 1 having the tracking elastic portions 273D and 274D for connecting the suspension base 21 and the movable portion 24, the elastic holding portions 212 extending in a substantially rod shape in the tracking directions T1 and T2, respectively. 213 is provided, and the elastic holding portions 212 and 213 hold the tracking elastic portions 273D and 274D, respectively.
For this reason, the flow direction of the LCP resin in each of the elastic holding portions 212 and 213 can be substantially only in the tracking directions T1 and T2, and the shape of each of the elastic holding portions 212 and 213 is changed in a high or low temperature environment. However, the shape change can be made only in the tracking directions T1 and T2. Therefore, the deformation of the elastic holding portions 212 and 213 can be made uniform regardless of the optical pickup device 1, and the variation in performance of each product can be reduced.
　（２）光学ピックアップ装置１に、サスペンションベース２１と可動部２４とを連結する各フォーカス弾性部２７６Ｄ～２７９Ｄを設けている。そして、可動部２４にトラッキング方向Ｔ１，Ｔ２にそれぞれ略棒状に延びる各弾性保持部２１４，２１５を設け、この各弾性保持部２１４，２１５に各フォーカス弾性部２７６Ｄ～２７９Ｄを保持させている。
　このため、トラッキングコイルと一対のフォーカスコイルとを有し、トラッキング方向Ｔ１，Ｔ２、フォーカス方向Ｆ１，Ｆ２、チルト方向Ｃへ可動部２４を移動させる構成においても、高温や低温の環境下における各弾性保持部２１２，２１３の形状変化を一様にでき、製品ごとの性能のばらつきを小さくできる。 (2) The optical pickup device 1 is provided with focus elastic portions 276D to 279D that connect the suspension base 21 and the movable portion 24. The movable portion 24 is provided with elastic holding portions 214 and 215 extending in a substantially rod shape in the tracking directions T1 and T2, respectively, and the elastic holding portions 214 and 215 hold the focus elastic portions 276D to 279D.
For this reason, even in a configuration having a tracking coil and a pair of focus coils and moving the movable portion 24 in the tracking directions T1, T2, the focus directions F1, F2, and the tilt direction C, each elasticity in a high or low temperature environment. The shape change of the holding parts 212 and 213 can be made uniform, and the variation in performance for each product can be reduced.
　（３）各弾性部２７３Ｄ，２７４Ｄ，２７６Ｄ～２７９Ｄを各弾性保持部２１２～２１５にインサート成形している。
　ここで、上記背景技術の構成では、フレキシブルプリント基板は、半田固定部でサスペンションワイヤに固定されているだけで、サスペンションホルダに固定されていない。このため、何の部材にも固定されていないフレキシブルプリント基板にサスペンションワイヤを固定する必要があり、サスペンションワイヤの位置精度が低くなったり、製造タクトが長くなったりするおそれがある。これに対して、本実施形態では、上述したインサート成形を適用しているため、各弾性部２７３Ｄ，２７４Ｄ，２７６Ｄ～２７９Ｄの位置精度を高めることができ、製造タクトも短くできる。 (3) The elastic portions 273D, 274D, 276D to 279D are insert-molded in the elastic holding portions 212 to 215, respectively.
Here, in the configuration of the above background art, the flexible printed circuit board is only fixed to the suspension wire by the solder fixing portion, and is not fixed to the suspension holder. For this reason, it is necessary to fix the suspension wire to the flexible printed circuit board that is not fixed to any member, and there is a possibility that the position accuracy of the suspension wire is lowered and the manufacturing tact time is increased. On the other hand, in the present embodiment, since the above-described insert molding is applied, the position accuracy of each of the elastic portions 273D, 274D, 276D to 279D can be increased, and the manufacturing tact can be shortened.
［他の実施形態］
　なお、本発明は前述の一実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良などは本発明に含まれるものである。 [Other Embodiments]
Note that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.
　すなわち、各サスペンション２７６～２７９、フォーカスコイル、各弾性保持部２１４，２１５を設けなくてもよい。また、各弾性保持部２１４，２１５を設けずに、各サスペンション２７６～２７９を各弾性保持部２１２，２１３で保持させてもよい。また、各サスペンション２７３，２７４，２７６～２７９を各弾性保持部２１２～２１５にインサート成形しなくてもよい。さらに、各弾性保持部２１２～２１５をフォーカス方向Ｆ１，Ｆ２に略棒状に延びるように設けてもよい。 That is, the suspensions 276 to 279, the focus coil, and the elastic holding portions 214 and 215 need not be provided. Further, the suspensions 276 to 279 may be held by the elastic holding portions 212 and 213 without providing the elastic holding portions 214 and 215, respectively. Further, the suspensions 273, 274, 276 to 279 may not be insert-molded in the elastic holding portions 212 to 215. Further, the elastic holding portions 212 to 215 may be provided so as to extend in a substantially rod shape in the focus directions F1 and F2.
　また、本発明を各レンズ２４１，２４２のうち一方のみを有する光学ピックアップ装置に適用してもよい。
　その他、本発明の実施の際の具体的な構造および手順は、本発明の目的を達成できる範囲で他の構造などに適宜変更できる。 Further, the present invention may be applied to an optical pickup device having only one of the lenses 241 and 242.
In addition, the specific structure and procedure for carrying out the present invention can be appropriately changed to other structures and the like within a range in which the object of the present invention can be achieved.
［実施形態の効果］
　上述したように、サスペンションベース２１と可動部２４とを連結する各トラッキング弾性部２７３Ｄ，２７４Ｄを有する光学ピックアップ装置１において、可動部２４にトラッキング方向Ｔ１，Ｔ２にそれぞれ略棒状に延びる各弾性保持部２１２，２１３を設け、この各弾性保持部２１２，２１３に各トラッキング弾性部２７３Ｄ，２７４Ｄを保持させている。
　このため、各弾性保持部２１２，２１３におけるＬＣＰ樹脂の流動方向をほぼトラッキング方向Ｔ１，Ｔ２のみにすることができ、高温や低温の環境下において各弾性保持部２１２，２１３の形状が変化したとしても、その形状変化をトラッキング方向Ｔ１，Ｔ２のみにすることができる。したがって、光学ピックアップ装置１によらず各弾性保持部２１２，２１３の変形を一様にでき、製品ごとの性能のばらつきを小さくできる。 [Effect of the embodiment]
As described above, in the optical pickup device 1 having the tracking elastic portions 273D and 274D that connect the suspension base 21 and the movable portion 24, the elastic holding portions that extend in a substantially rod shape in the tracking directions T1 and T2 on the movable portion 24, respectively. 212 and 213 are provided, and the elastic holding portions 212 and 213 hold the tracking elastic portions 273D and 274D, respectively.
For this reason, the flow direction of the LCP resin in each of the elastic holding portions 212 and 213 can be substantially only in the tracking directions T1 and T2, and the shape of each of the elastic holding portions 212 and 213 is changed in a high or low temperature environment. However, the shape change can be made only in the tracking directions T1 and T2. Therefore, the deformation of the elastic holding portions 212 and 213 can be made uniform regardless of the optical pickup device 1, and the variation in performance of each product can be reduced.
　本発明は、光学ピックアップ装置として利用できる。 The present invention can be used as an optical pickup device.

Claims (3)

  1. 　ベース部材と、このベース部材に固定される支持部と、レンズを有する可動部と、前記支持部に対して前記可動部を移動させる動作制御部と、を具備し、
    　前記動作制御部は、
    　コイルを保持し、前記可動部に設けられたコイル保持部と、
    　前記コイルと隙間を介して略対向する状態で前記ベース部材に設けられた磁石と、
    　前記支持部と前記可動部とを連結するとともに前記コイルに電気的に接続された第１の弾性部および第２の弾性部と、を備え、前記コイルへの通電により発生する電磁力で前記可動部を往復移動させ、
    　前記支持部は、トラッキング方向の両側またはフォーカス方向の両側に向かって略棒状に延びる形状に形成されて、前記第１の弾性部および前記第２の弾性部をそれぞれ保持する第１の弾性保持部および第２の弾性保持部を備えている
    　ことを特徴とする光学ピックアップ装置。     A base member, a support part fixed to the base member, a movable part having a lens, and an operation control part for moving the movable part relative to the support part,
    The operation controller is
    A coil holding part that holds the coil and is provided in the movable part;
    A magnet provided on the base member in a state of being substantially opposed to the coil via a gap;
    A first elastic portion and a second elastic portion that connect the support portion and the movable portion and are electrically connected to the coil; and the movable portion is electromagnetically generated by energization of the coil. Move the part back and forth,
    The support portion is formed in a shape extending substantially in a rod shape toward both sides in the tracking direction or both sides in the focus direction, and holds the first elastic portion and the second elastic portion, respectively. An optical pickup device comprising: a second elastic holding portion.
  2. 　請求項１に記載の光学ピックアップ装置において、
    　前記動作制御部は、
    　前記コイルの近傍に設けられた第１の近傍コイルおよび第２の近傍コイルを保持し、前記レンズを挟む状態で設けられた一対の前記コイル保持部と、
    　前記支持部と前記可動部とを連結するとともに前記第１の近傍コイルに電気的に接続され、前記第１の弾性部の前記フォーカス方向の一方向側に設けられた第３の弾性部と、
    　前記支持部と前記可動部とを連結するとともに前記第２の近傍コイルに電気的に接続され、前記第１の弾性部の前記フォーカス方向の一方向側に設けられた第４の弾性部と、を備え、前記コイルへの通電により発生する電磁力で前記可動部を前記トラッキング方向に往復移動させ、前記第１の近傍コイルおよび前記第２の近傍コイルへの通電による電磁力で前記可動部をフォーカス方向およびチルト方向のうち少なくとも一方に往復移動させ、
    　前記支持部は、
    　前記トラッキング方向の両側に向かって延びる前記第１の弾性保持部および前記第２の弾性保持部と、
    　前記第１の弾性保持部および前記第２の弾性保持部の前記フォーカス方向の一方向側から前記トラッキング方向の両側に向かって略棒状に延びる形状に形成されて、前記第３の弾性部および前記第４の弾性部をそれぞれ保持する第３の弾性保持部および第４の弾性保持部と、を備えている
    　ことを特徴とする光学ピックアップ装置。     The optical pickup device according to claim 1,
    The operation controller is
    A pair of coil holding portions provided in a state of holding the first proximity coil and the second proximity coil provided in the vicinity of the coil and sandwiching the lens;
    A third elastic portion that connects the support portion and the movable portion and is electrically connected to the first neighboring coil, and is provided on one direction side of the focus direction of the first elastic portion;
    A fourth elastic portion that connects the support portion and the movable portion and is electrically connected to the second neighboring coil, and is provided on one side of the focus direction of the first elastic portion; The movable part is reciprocated in the tracking direction by an electromagnetic force generated by energizing the coil, and the movable part is moved by an electromagnetic force by energizing the first neighboring coil and the second neighboring coil. Reciprocate in at least one of the focus direction and tilt direction,
    The support part is
    The first elastic holding part and the second elastic holding part extending toward both sides in the tracking direction;
    The first elastic holding portion and the second elastic holding portion are formed in a shape extending in a substantially rod shape from one direction side in the focus direction toward both sides in the tracking direction, and the third elastic portion and the second elastic holding portion An optical pickup device comprising: a third elastic holding portion and a fourth elastic holding portion, each holding a fourth elastic portion.
  3. 　請求項１または請求項２に記載の光学ピックアップ装置において、
    　前記弾性部は、前記弾性保持部にインサート成形されることで保持されている
    　ことを特徴とする光学ピックアップ装置。     The optical pickup device according to claim 1 or 2,
    The said elastic part is hold | maintained by insert-molding to the said elastic holding part. The optical pick-up apparatus characterized by the above-mentioned.
PCT/JP2009/051268 2009-01-27 2009-01-27 Optical pickup device WO2010086957A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03125335A (en) * 1989-10-07 1991-05-28 Olympus Optical Co Ltd Optical system supporter
JPH1040560A (en) * 1997-04-24 1998-02-13 Olympus Optical Co Ltd Optical head apparatus
JP2002015444A (en) * 2000-06-29 2002-01-18 Ricoh Co Ltd Supporting mechanism for movable member and supporting mechanism for objective lens driving device
JP2005235277A (en) * 2004-02-18 2005-09-02 Pioneer Electronic Corp Method for molding synthetic resin structure, method for molding actuator for pickup, synthetic resin structure, and actuator for pickup

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03125335A (en) * 1989-10-07 1991-05-28 Olympus Optical Co Ltd Optical system supporter
JPH1040560A (en) * 1997-04-24 1998-02-13 Olympus Optical Co Ltd Optical head apparatus
JP2002015444A (en) * 2000-06-29 2002-01-18 Ricoh Co Ltd Supporting mechanism for movable member and supporting mechanism for objective lens driving device
JP2005235277A (en) * 2004-02-18 2005-09-02 Pioneer Electronic Corp Method for molding synthetic resin structure, method for molding actuator for pickup, synthetic resin structure, and actuator for pickup

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