JP5738221B2 - Optical pickup device - Google Patents

Description

  The present invention relates to an optical pickup device that reads information recorded on an optical disk or records information on an optical disk, and in particular, a plate that presses a lens unit having an objective lens and an element unit having a light emitting element and a light receiving element. The present invention relates to an optical pickup device provided with a spring.

  A disk device that reproduces information recorded on various optical disks such as a compact disk, a digital versatile disk, or a Blu-ray disk, or records information, includes a rotation drive unit that rotates the disk and a rotating disk. An optical pickup device that moves along is provided.

  In the optical pickup device, a lens unit having an objective lens facing the disc and a tilt adjustment mechanism are mounted on a moving base that moves along the recording surface of the disc. The tilt adjustment mechanism is for fixing the lens unit after adjusting the tilt of the lens unit on the moving base so that the optical axis of the objective lens is as perpendicular to the recording surface of the disc as possible. In addition, a light receiving and emitting element that provides detection light to the objective lens and detects reflected light from the disc is mounted on the moving base.

  The optical pickup described in Patent Document 1 includes an actuator that is a lens unit in which an objective lens is mounted on a chassis that is a moving base, a tilt adjustment mechanism, and an element unit in which a light emitting and receiving unit is mounted on a support plate. It is attached.

  This optical pickup is provided with a plate spring for tilt adjustment that holds a part of the actuator against the chassis when the tilt of the actuator is adjusted by the tilt adjustment mechanism. Further, a heat radiating cover formed of a metal plate is attached to the chassis, and an elastic piece provided on the heat radiating cover comes into contact with the light emitting / receiving unit, and heat generated from the light receiving / emitting unit is transmitted to the heat radiating cover.

  In the optical disc recording / reproducing apparatus described in Patent Document 2, a lens driver that is a lens unit having an objective lens, a tilt adjustment mechanism, and a laser module that is a lens unit are mounted on a base that is a moving base. .

  In this invention, a laser radiation plate spring is attached to the base, and on this laser radiation plate spring, a radiation projection that contacts the heat radiation portion of the laser module, and an optical axis that holds the lens drive body during tilt adjustment Both the tilt adjustment pressing springs are integrally formed.

JP-A-2005-353120 JP 2001-297467 A

  The optical pickup described in Patent Document 1 includes a tilt adjustment plate spring and a heat dissipation cover that contacts the light emitting and receiving unit as separate members, and thus has a large number of components, and the tilt adjustment plate. Since it is necessary to separately attach the spring and the heat radiation cover to the chassis, the assembling work is complicated.

  In the optical disc recording / reproducing apparatus described in Patent Document 2, the number of parts and assembly man-hours are reduced because the heat radiation protrusion and the optical axis tilt adjustment pressing spring are integrally formed on the laser heat radiation plate spring. Is possible. However, the holding spring for adjusting the optical axis tilt allows the lens unit to be elastically pressed toward the bottom of the base. Therefore, in the assembling work, the base plate is attached with the laser radiation plate spring first attached to the base. If the lens drive body is to be assembled, the optical axis tilt adjustment holding spring must be lifted and the lens drive body must be inserted underneath it, and the optical axis tilt adjustment holding spring is likely to be deformed. There is.

  In addition, it is necessary to incorporate a laser heat dissipating leaf spring while lifting the optical axis tilt adjusting presser spring in the assembly work of incorporating the laser heat dissipating leaf spring after installing the lens driving body on the base. There is a problem that the holding spring for adjusting the optical axis tilt is likely to be deformed or damaged.

  The present invention solves the above-described conventional problems, and includes an auxiliary member in which a first plate spring for pressing an element unit that exhibits a light emitting and receiving function and a second plate spring for pressing a lens unit are provided integrally. It is an object of the present invention to provide an optical pickup device that is less likely to be deformed or damaged even when used, and that facilitates assembly work.

The present invention provides a moving base that moves along the surface of a disk, a lens unit that has an objective lens that supplies detection light to the disk and supplements reflected light from the disk, and at least of detection light emission and reflection light reception. In an optical pickup device equipped with an element unit provided with an element having one function,
An auxiliary member formed of a metal plate is attached to the moving base, and a first leaf spring that presses the element unit against the moving base and the lens unit against the moving base are mounted on the auxiliary member. A second base spring is integrally formed, the second plate spring has a fixed base fixed to the fixed reference surface of the moving base , and a pressing end for pressing the lens unit , The direction in which the element unit is pressed by the first leaf spring is the same as the direction in which the auxiliary member is attached to the moving base, and the second leaf spring extends in the attachment direction. And
In a state where the auxiliary member is mounted on the moving base and before the force for pressing the fixed base against the fixed reference surface is applied, the second leaf spring has the fixed base separated from the fixed reference surface. And the pressing end portion extends in a direction away from the lens unit installed on the moving base, and the second leaf spring is deformed by a force with which the fixed base portion is pressed against the fixed reference surface , The lens unit is pressed by the pressing end.

In the optical pickup device of the present invention, since the second leaf spring is set in a direction away from the lens unit in advance, it is not necessary to lift the second leaf spring when the auxiliary member is attached to the moving base. After the auxiliary member is mounted on the moving base, the second leaf spring is deformed by fixing the fixed base portion of the second leaf spring to the moving base, and the lens unit is pushed with an appropriate elastic force at the pressing end. For example Rukoto becomes possible.
Further, the first plate spring can be elastically pressed against the element unit only by mounting the auxiliary member in one direction, and the second plate spring can be opposed to the lens unit.

  In the present invention, a fixing hole through which a fixing screw is inserted is formed in the fixing base portion of the second leaf spring, and a notch portion is formed in a boundary portion between the main body portion of the auxiliary member and the fixing hole. It is what.

  When the notch is formed, when the fixed base is screwed to the moving base, the second leaf spring is easily deformed by the tightening force, and the lens unit is appropriately elastic at the pressing end. It becomes possible to press with.

In the present invention, a third leaf spring that is pressed against a guide shaft that guides the moving base is integrally formed on the auxiliary member, and the third leaf spring is in a region outside the moving base, It can be configured as extending along the moving direction of the moving base.

  The wiring member extending from the element unit may be pressed against the moving base by the main body of the auxiliary member.

  In the present invention, since the first leaf spring and the second leaf spring are integrally formed of the same auxiliary member, the number of parts can be reduced. By simply assembling the auxiliary member in one direction with respect to the moving base, the first plate spring can be elastically pressed against the element unit and the second plate spring can be opposed to the lens unit. .

  The second leaf spring is deformed so that the pressing end is away from the moving base until the fixed base is fixed to the moving base. Therefore, it is necessary to lift and deform the second leaf spring during the assembling work. It becomes easy to prevent deformation and breakage of the second leaf spring.

The perspective view of the optical pick-up apparatus of embodiment of this invention, FIG. 2 is an exploded perspective view showing an operation of attaching an auxiliary member to the optical pickup device shown in FIG. A longitudinal sectional view of the optical pickup device, A plan view showing the structure of the moving chassis, The fragmentary sectional view which shows the assembly operation which presses a lens unit with a 2nd leaf | plate spring,

  An optical pickup device 1 shown in FIG. 1 is equipped in a disc device for reproducing information recorded on various optical discs such as a compact disc, a digital versatile disc, or a Blu-ray disc and recording the information.

  The disk device is equipped with a rotation driving unit that rotates and holds the center of the disk, and an optical pickup device 1 shown in FIG. The optical pickup device 1 is guided by two guide shafts 2 and 3 and moved in the radial direction of the disc along the recording surface of the disc.

  As shown in FIG. 2, the optical pickup device 1 includes a moving base 10, a lens unit 20 mounted on the moving base 10, an element unit 30 attached to the moving base 10, and an auxiliary member 40.

  The moving base 10 is made of a synthetic resin material or an aluminum alloy. As shown in FIGS. 1 and 2, a reference bearing portion 11 is integrally formed on one side (X1 side) of the moving base 10. A pair of bearing holes 11a and 11b are formed in the reference bearing portion 11, and the bearing holes 11a and 11b are inserted through one guide shaft 2 serving as a movement reference through a minimum gap. A bearing 12 is provided on the other side (X2 side) of the moving base 10, and the other guide shaft 3 is sandwiched between the bearing 12 and the third leaf spring 53 provided on the auxiliary member 40. It is. The movement base 10 can move linearly in the Y1-Y2 direction along the surface of the disk with the axis center line of the guide shaft 2 as a movement reference line.

  The disk device is provided with a screw shaft arranged in parallel with the guide shaft 2 and a thread mechanism for rotating the screw shaft with the power of the motor. The moving base 10 is provided with a leaf spring member extending in the X1 direction from the reference bearing portion 11, and a sliding latching portion is formed integrally with the leaf spring member. The sliding latching portion is slidably latched in the male screw groove of the screw shaft, and the rotational force of the screw shaft is applied to the moving base 10 from the sliding latching portion and the leaf spring member. 2 and 3 along the Y1-Y2 direction.

  As shown in FIG. 4, adjustment recesses 13, 13, and 13 are integrally formed at three locations inside and at the bottom of the moving base 10. The adjustment recesses 13, 13, and 13 have a partially curved surface shape, and the adjustment recesses 13, 13, and 13 coincide with a part of the peripheral surface of the same virtual spherical surface Q as shown in FIG. 3. Adjustment holes 14 a and 14 b are formed in the moving base 10. As shown in FIGS. 1 and 2, one adjustment hole 14 a is formed so as to vertically penetrate the raised portion 10 a formed in the side wall portion of the moving base 10, and as shown in FIG. 4, the other adjustment hole 14 a is formed. 14 b is formed through the bottom 10 b of the moving base 10.

  As shown in FIG. 4, the movement base 10 is formed with an optical path 15 that opens in the side surface 10c facing the X2 side and extends in the X1-X2 direction. As shown in FIG. 3, an optical support 10d is formed on the bottom 10b of the moving base 10 on the extension of the optical path 15, and a reflecting member 16 is installed on the optical support 10d. The reflecting member 16 reflects detection light directed in the X1 direction upward (Z1 direction) and directs reflected light directed downward (Z2 direction) in the X2 direction.

  As shown in FIGS. 2 and 4, a spring fixing reference surface 10e is formed on the side of the moving base 10 on the X2 side and the Y2 side. The spring fixing reference surface 10e is a plane parallel to the recording surface of the disk held by the rotation drive unit. A fixed screw hole 17 that is a female screw hole is formed in the spring fixing reference surface 10e in the Z2 direction, and a small recess 18 is formed on the X2 side of the fixed screw hole 17.

  As shown in FIG. 2, on the side surface 10c of the moving base 10 facing in the X2 direction, positioning projections 19 projecting in the X2 direction are integrally formed at the corners on the Y1 side and the Z2 side.

  As shown in FIG. 3, the lens unit 20 includes a unit base 21a and a unit cover 21b that covers the unit base 21a. A lens holder 23 that holds the objective lens 22 is provided inside the unit cover 21b, and the objective lens 22 is located inside an opening 21c formed in the unit cover 21b. The lens holder 23 is supported by a suspension formed of a steel wire extending from the unit base 21a so as to vibrate in the tracking direction (Y direction) and the focusing direction (Z direction).

  A correction drive mechanism that vibrates the lens holder 23 in the tracking direction and the focusing direction is provided on the unit base 21a. The drive correction mechanism includes a tracking correction coil and a focusing correction coil mounted on the lens holder 23, and a magnet that is supported by the unit base 21a and faces each coil. By energizing the tracking coil, the lens holder 23 is driven in the tracking correction direction (Y direction), and by energizing the focusing coil, the lens holder 23 is driven in the focusing correction direction (Z direction).

  As shown in FIG. 3, sliding projections 24, 24, 24 are formed at three locations on the unit base 21a, and the sliding projections 24, 24, 24 are slidably applied to the adjusting recesses 13, 13, 13, respectively. It touches. As shown in FIG. 3, the optical axis L <b> 1 of the objective lens 22 basically extends in the Z direction directly above the reflecting member 16 fixed to the moving base 10. In terms of design, the principal point L0 of the objective lens 22 is located at the center of the phantom spherical surface Q including the adjustment recesses 13, 13, and 13.

  As shown in FIG. 2, the element unit 30 has a unit substrate 31. The unit substrate 31 is a metal plate such as aluminum or a synthetic substrate such as glass epoxy. A flexible circuit board 32 is laminated on the surface of the unit board 31 facing the X2 side and fixed with an adhesive. The element unit 30 is formed with a pair of attachment holes 30 a and 30 b that penetrate the unit substrate 31 and the flexible circuit substrate 32.

  The flexible circuit board 32 is formed of a flexible resin film, and a conductive pattern is formed on the surface facing the X2 side. A light receiving / emitting element 33 is fixed to the surface of the flexible circuit board 32 facing the X2 side, and a plurality of terminals 33a extending from the light receiving / emitting element 33 are fixed to a land portion connected to the conductive pattern by soldering or the like. Yes.

  The light emitting / receiving element 33 is formed by integrating a light emitting element (light emitting part) that emits laser light as detection light and a light receiving element (light receiving part). The detection light is given to the reflecting member 16 through the light path 15, reflected in the Z1 direction, and condensed on the recording surface of the disk by the objective lens 22. The reflected light reflected from the recording surface of the disk is captured by the objective lens 22, reflected by the reflecting member 16, and detected by the light receiving element through the optical path 15.

  As the element unit, either one of the light emitting element and the light receiving element is fixed to the unit substrate 31, and the other element is fixed to the moving base 10 by other means. There may be.

  As shown in FIG. 2, the flexible circuit board 32 has a lateral extension 32a extending from the unit board 31 and extending in the Y1 direction. A side lead portion 32b that passes the side surface on the Y1 side of the unit cover 21b of the lens unit 20 is formed at the tip of the side extension portion 32a, and further, the drive wiring located on the side surface facing the X1 side of the lens unit 20 A portion 32c is formed. The tracking coil and the focusing coil provided in the lens unit 20 are electrically connected to the conductive pattern of the drive wiring portion 32c.

  The flexible circuit board 32 is integrally formed with an upper extension 32d that is detached from the unit board 31 and extends in the Z1 direction, and an external extension part 32e extending in the Y1 direction is continuous from the upper extension 32d. . The light emitting / receiving element 33, the tracking coil, and the focusing coil are connected to an external drive circuit and a detection circuit by a lead pattern formed on the surface of the external lead portion 32e.

  The auxiliary member 40 functions as a leaf spring holding member and further functions as a heat radiating member. The auxiliary member 40 is formed by being bent from a spring metal plate such as a stainless steel plate or phosphor bronze plate that can function as a plate spring.

  As shown in FIG. 2, the auxiliary member 40 includes a first plate portion 41 extending in the vertical direction and a second plate portion 42 extending in the horizontal direction, and the first plate portion 41 and the second plate portion 42 are bent. A main body 43 is constituted by the plate portion 42. The first plate portion 41 is bent into a mounting piece 44a that is bent from the Y1 side and positioned on the X1 side, and a mounting piece 44b that is bent from the Y2 side and positioned on the X1 side. It is bent. A mounting hole 45a is formed in the mounting piece 44a, and a mounting hole 45b is formed in the mounting piece 44b. A positioning recess 46 is formed in the mounting piece 44a.

  A first leaf spring 47 is formed integrally with the first plate portion 41 of the main body portion 43. The first leaf spring 47 extends in the Y1 direction with the bent base portion 47a as a base end, and the distal end portion in the Y1 direction serves as a pressing contact portion 47b.

  The second plate portion 42 of the main body portion 43 of the auxiliary member 40 extends in parallel with the XY plane. As shown in FIG. 1, the second plate portion 42 functions as a pressing member (pressing plate) that presses the upper extension 32 d of the flexible circuit board 32 of the element unit 30 onto the side upper surface 10 f of the moving base 10. Yes.

  As shown in FIG. 2, an extension portion 42a extending in the Y2 direction is formed on a part of the second plate portion 42, and the second leaf spring 48 continuously extends in the X1 direction from the extension portion 42a. ing. The second leaf spring 48 has a fixed base portion 48a connected to the extension portion 42a and a pressing end portion 48b formed at the free end in the X1 direction. A notch 49 is formed at the boundary between the fixed base 48a and the extension 42a. A fixing hole 51 is opened in the fixed base 48 a, and a notch 49 is formed in a shape surrounding the fixing hole 51.

  The extension part 42a, which is a part of the main body part 43, and the fixed base part 48a of the second leaf spring 48 are divided with the notch part 49 as a boundary. In this boundary portion, the metal plate constituting the auxiliary member 40 is bent and deformed in the narrow width portions 52a and 52b on both sides of the notch portion 49, and an external force is applied as shown in FIGS. 2 and 5A. In a free state, the pressing end 48b of the second leaf spring 48 is lifted in the Z1 direction.

  As shown in FIG. 2, a third leaf spring 53 is integrally formed on the auxiliary member 40 at the lower end portion of the first plate portion 41. The third leaf spring 53 extends in the Y direction outside the X1 side of the moving base 10. In the third leaf spring 53, a base end portion 53a is located on the Y1 side, and a sandwiching protrusion 53b is integrally formed at a free end facing the Y2 side. A stopper piece 54 is bent at the lower end portion on the Y2 side of the first plate portion 41. The stopper piece 54 is opposed to the third leaf spring 53 in the Z1 direction via a gap, and the third leaf spring 53 is inadvertently deformed in the Z1 direction during assembly work or the like. Is prevented.

Next, a method for assembling and adjusting the optical pickup device 1 will be described.
As shown in FIG. 2, the unit substrate 31 of the element unit 30 is installed on the side surface 10 c of the moving base 10, and the upper extension 32 d of the flexible circuit board 32 is bent and installed on the side upper surface 10 f of the moving base 10. The In this state, the auxiliary member 40 is attached to the moving base 10. The mounting direction at this time is the X1 direction. That is, the mounting direction of the auxiliary member 40 is the same as the direction in which the first leaf spring 47 is pressed and the direction in which the second leaf spring 48 extends.

  In the mounting operation of the auxiliary member 40, the mounting screw 57 is inserted into the mounting hole 45 a of the auxiliary member 40 and the mounting hole 30 a of the element unit 30 and screwed into the female screw hole formed in the side surface 10 c of the moving base 10. . Similarly, the attachment screw 58 is inserted into the attachment hole 45 b of the auxiliary member 40 and the attachment hole 30 b of the element unit 30 and screwed into the female screw hole formed in the side surface 10 c of the moving base 10.

  When the auxiliary member 40 is mounted on the moving base 10, the pressing contact portion 47 b of the first leaf spring 47 hits the surface on the X2 side of the light emitting / receiving element 33. As shown in FIG. 5A, the fixed base portion 48a of the second leaf spring 48 is installed on the spring fixing reference surface 10e of the moving base 10, but the fixed base portion 48a of the second leaf spring 48 is fixed. Since the end portion on the X2 side enters the inside of the small recess 18 formed in the spring fixing reference surface 10e, the second leaf spring 48 maintains the posture in which the pressing end portion 48b is lifted in the Z1 direction. .

  After the auxiliary member 40 is mounted, the lens unit 20 is mounted on the moving base 10. As shown in FIG. 5 (A), since the second leaf spring 48 is in an upward posture, it is not necessary to apply an excessive lifting force to the second leaf spring 48, and the second leaf spring 48 is placed below the second leaf spring 48. The lens unit 20 can be installed.

  As shown in FIG. 4, the adjustment screw 61 is inserted into the adjustment hole 14 a penetrating the moving base 10 upward from the bottom as shown in FIGS. 1 and 2. The unit base 21a of the lens unit 20 is integrally formed with a protrusion 26 on the Y1 side, and an adjustment female screw hole 27 is formed in the protrusion 26. The upper end of the adjustment screw 61 inserted from below into the adjustment hole 14 a is screwed into the adjustment female screw hole 27. As shown in FIG. 3, the adjustment screw 62 is inserted upward from below into the adjustment hole 14 b penetrating the bottom portion 10 b of the moving base 10. An adjusting screw 62 is screwed into the adjusting female screw hole 28 formed in the unit base 21 a of the lens unit 20. The lens unit 20 is temporarily fixed on the moving base 10 by the adjusting screws 61 and 62.

  The assembly to the moving base 10 is not limited to the above order. First, after the lens unit 20 is assembled and temporarily fixed by the adjusting screws 61 and 62, the element unit 30 is installed on the side surface 10c of the moving base 10. Then, the auxiliary member 40 may be mounted toward the X1 direction.

  Even in this assembly procedure, as shown in FIG. 5A, the auxiliary member 40 is mounted in the X1 direction in a state where the pressing end portion 48b of the second leaf spring 48 is directed upward. The pressing end 48 b of the second leaf spring 48 is less likely to hit the moving base 10 and the lens unit 20, and it is easy to prevent an inadvertent bending force from acting on the second leaf spring 48.

  When the auxiliary member 40 is mounted on the moving base 10, the light emitting / receiving element 33 is pressed against the side surface 10 c of the moving base 10 by the pressing contact portion 47 b of the first leaf spring 47. The position of the optical axis of the light emitting / receiving element 33 can be adjusted by moving the element unit 30 pressed against the side surface 10c before completely tightening the mounting screws 57 and 58.

  When the position adjustment of the optical axis of the light emitting / receiving element 33 is completed, the element unit 30 and the auxiliary member 40 are fixed to the moving base 10 by tightening the mounting screws 57, 58, and the upper extension 32d of the flexible circuit board 32 is The second plate portion 42 is pressed against and held by the side portion upper surface 10 f of the moving base 10.

  The auxiliary member 40 can also function as a heat radiating member, and heat generated from the light receiving and emitting element 33 is transferred from the first plate spring 47 to the second plate portion 42 having a relatively large area and radiated.

  As shown in FIGS. 1 and 5B, the fixing screw 59 is inserted into the fixing hole 51 formed in the fixing base portion 48 a of the second leaf spring 48, and the fixing screw hole formed in the moving base 10. 17 is screwed. When the fixing screw 59 is tightened, the fixing base portion 48 a of the second leaf spring 48 is pressed against the spring fixing reference surface 10 e of the moving base 10 by the head portion 59 a of the fixing screw 59. Since the fixed base portion 48a is in close contact with the horizontal spring fixing reference surface 10e, the second leaf spring 48 is deformed so that the pressing end portion 48b is greatly lowered in the Z2 direction. Then, the pressed end portion 48b pushes the pressed portion 20a formed on the unit base 21a of the lens unit 20 downward, and the three slide protrusions 24, 24, 24 of the lens unit 20 shown in FIG. It is pressed against the three adjustment recesses 13, 13, 13 formed in the moving base 10.

  When the screwing amount of the adjusting screw 61 mounted on the moving base 10 is adjusted, the sliding protrusions 24, 24, 24 slide on the adjusting recesses 13, 13, 13 positioned on the phantom spherical surface Q, and the objective Radial skew adjustment for correcting the tilt of the optical axis L1 of the lens 22 in the Y1-Y2 direction is performed. When the screwing amount of the adjusting screw 62 is adjusted, tangential skew adjustment for correcting the tilt of the optical axis L1 of the objective lens 22 in the X1-X2 direction is performed.

  In the embodiment, as shown in FIG. 5B, the fixed base portion 48a of the second leaf spring 48 is pressed against the spring fixing reference surface 10e of the moving base 10 by the head portion 59a of the fixing screw 59. However, for example, the fixed base 48 a may be pressed by means other than the fixing screw 59. For example, a metal fitting for pressing the fixed base portion 48a may be fixed to the moving base 10 with a screw, or the fixed base portion 48a may be pressed against the moving base 10 with a spring grip.

  In the assembled optical pickup device 1, bearing holes 11 a and 11 b formed on one side of the moving base 10 are inserted into the guide shaft 2. On the other side of the moving base 10, the guide shaft 3 is clamped by the clamping protrusion 53 b at the free end of the third leaf spring 53 and the bearing 12. Then, the optical pickup device 1 can be moved along the guide shafts 2 and 3 by the rotation of the screw shaft.

  Note that the skew adjustment using the adjusting screws 61 and 62 is performed in a state where the moving base 10 is supported by the guide shafts 2 and 3 of the disk device and the disk can be installed in the rotation drive unit.

  As shown in FIG. 2, the third leaf spring 53 extends in the Y1-Y2 direction, which is the guide direction of the guide shafts 2 and 3, outside the X2 side of the moving base 10, so that the small auxiliary member 40 The free length of the third leaf spring 53 can be secured sufficiently long, and the force for clamping the guide shaft 3 by the clamping projection 53b can be adjusted in a wide range.

DESCRIPTION OF SYMBOLS 1 Optical pick-up apparatus 2, 3 Guide shaft 10 Moving base 10e Spring fixed reference surface 13 Adjustment recessed part 14a, 14b Adjustment hole 17 Fixing screw hole 18 Small recessed part 20 Lens unit 20a Pressed part 21a Unit base 22 Objective lens 24 Sliding protrusion 30 Element Unit 31 Unit Board 32 Flexible Circuit Board 33 Light-Emitting / Receiving Element 40 Auxiliary Member 43 Body 47 First Plate Spring 48 Second Plate Spring 48a Fixed End 48b Pressing End 49 Notch 53 Third Plate Spring

Claims (4)

A lens unit having an objective lens that provides detection light to the disk and captures reflected light from the disk on a moving base that moves along the surface of the disk, and at least one function of emitting detection light and receiving reflected light In an optical pickup device equipped with an element unit provided with an element having
An auxiliary member formed of a metal plate is attached to the moving base, and a first leaf spring that presses the element unit against the moving base and the lens unit against the moving base are mounted on the auxiliary member. A second base spring is integrally formed, the second plate spring has a fixed base fixed to the fixed reference surface of the moving base , and a pressing end for pressing the lens unit , The direction in which the element unit is pressed by the first leaf spring is the same as the direction in which the auxiliary member is attached to the moving base, and the second leaf spring extends in the attachment direction. And
In a state where the auxiliary member is mounted on the moving base and before the force for pressing the fixed base against the fixed reference surface is applied, the second leaf spring has the fixed base separated from the fixed reference surface. And the pressing end portion extends in a direction away from the lens unit installed on the moving base, and the second leaf spring is deformed by a force with which the fixed base portion is pressed against the fixed reference surface , The optical pickup device, wherein the lens unit is pressed by the pressing end.   2. A fixing hole through which a fixing screw is inserted is formed in the fixing base portion of the second leaf spring, and a notch is formed at a boundary portion between the main body portion of the auxiliary member and the fixing hole. The optical pickup device described. To the auxiliary member, a third leaf spring which presses the guide shaft that guides the moving base is integrally formed, the third leaf spring is, in a region outside of the moving base, said mobile base The optical pickup device according to claim 1 , wherein the optical pickup device extends along a moving direction. 4. The optical pickup device according to claim 1, wherein a wiring member extending from the element unit is pressed against the moving base by the main body portion of the auxiliary member. 5.

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