JP4221868B2 - Optical disk device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an optical disc apparatus that records or reproduces information by irradiating an optical disc that is an optical recording medium with a light beam with high accuracy.
[0002]
[Prior art]
  In recent years, optical disc apparatuses having a traverse mechanism for driving and controlling an optical head for irradiating a light beam in the radial direction of the optical disc are computer peripheral devices (CD-ROM, magneto-optical disc, phase change disc, etc.), AV equipment (CD, VideoCD, It has been attracting attention as a key part of information storage / playback apparatuses such as video disks and DVDs. In particular, as information storage / reproduction devices become lighter, thinner, and smaller, optical disc devices are required to be smaller and lighter, and reliability and assemblability have been emphasized.
[0003]
  Hereinafter, a conventional optical disc apparatus will be described with reference to the drawings.
[0004]
  FIG. 10 is a structural perspective view showing a conventional optical disk apparatus, showing a partial cross-sectional perspective view, and FIG. 11 is a schematic cross-sectional structural view taken along the broken line V in FIG.
[0005]
  10 and 11, reference numeral 1002 denotes a chassis, which is a sheet metal press. On the chassis 1002, a spindle motor 1004 in which a turntable 1003 is press-fitted into a rotating shaft is provided. The disk 0 is placed on the turntable 1003 and rotated by the spindle motor 1004.
[0006]
  The optical pickup 1006 is guided by a pair of guide shafts composed of a main shaft 1007a and a sub shaft 1007b so as to be movable in the radial direction of the disk 0, and records and reproduces information by irradiating the rotating disk 0 with a light beam by a spindle motor 1004. . The main shaft 1007a is fixed by a fixed portion 1008 so that the vicinity of the inner peripheral end of the disk serves as a fulcrum, and is disposed in the vicinity of the outer peripheral end so as to be movable in the vertical direction while regulating the position in the left-right direction. . Further, the sub shaft 1007b is disposed so as to be movable in the vertical direction while restricting the position in the left-right direction by the inner peripheral shaft receiver 1013 and the outer peripheral shaft receiver 1011 in the vicinity of the inner peripheral end and the outer peripheral end of the disc. .
[0007]
  That is, as shown in FIGS. 10 and 11, a spring 1009 is provided between the end portion of the sub shaft 1007b and the chassis 1002, and pushes the sub shaft 1007b upward. In order to resist this force, the adjusting screw 1010 is in contact with the screw tip near the spring 1009 from above the sub shaft 1007b. The adjustment screw 1010 is supported by being screwed into an outer peripheral shaft receiver 1011 fixed to the chassis 1002. When the adjustment screw 1010 is rotated by the rotary jig 1012, the adjustment screw 1010 moves up and down relatively with respect to the chassis 1002, and the sub shaft 1007b pressed against the adjustment screw 1010 by the spring 1009 is located on the outer peripheral side of the disk with respect to the chassis 1002. To move up and down.
[0008]
  Similarly, an inner peripheral shaft receiver 1013 for restricting the right and left direction of the shaft is fixed to the chassis 1002 at the inner peripheral end of the sub shaft 1007b, and a spring 1014 is provided between the inner peripheral shaft receiver 1013 and the sub shaft 1007b. The sub shaft 1007b is pushed downward. A spring 1009 is provided between the chassis 1002 and the sub shaft 1007b is pushed upward. In order to resist this force, the adjustment screw 1015 is in contact with the tip of the screw 1014 near the spring 1014 from below the sub shaft 1007b. The adjustment screw 1015 can be finely moved up and down with respect to the chassis 1002 on the inner periphery side of the disk by rotating the adjustment screw 1015 supported by being screwed to the chassis 1002 with the rotary jig 1016.
[0009]
  The outer end of the main shaft 1007a has the same configuration as the outer end of the sub shaft 1007b. By rotating the adjusting screw 1017, the shaft is moved up and down with respect to the chassis 1002 on the outer periphery of the disk. Can be finely moved.
[0010]
  A lead screw 1018 has a spiral groove 1018a on a cylindrical surface, and an end portion 1020 closer to the spindle motor 1004 is a thrust bearing portion 1021 of the fixed portion 1008 so as to be substantially parallel to the main shaft 1007a. The other end portion 1022 is inserted into the bearing portion 1023 and is rotatably supported, and a large gear 1024 is fixed to the end portion. A traverse motor 1025 has a small gear 1026 fixed to its rotating shaft, and the traverse motor 1008 is fixed to the chassis 1002 so that the small gear 1026 and the large gear 1024 are engaged.
[0011]
  A nut 1027 provided in the optical pickup 1006 is engaged with the spiral groove 1018 a of the lead screw 1018. The lead screw 1018 is rotated by a traverse motor 1025, whereby a nut 1027 is sent in parallel to the lead screw 1018 along the spiral groove 1018a, and accordingly, the optical pickup 1006 is moved in the radial direction of the disc.
[0012]
  Reference numeral 1030 denotes a flexible printed circuit board (hereinafter abbreviated as “flexible”), which is a very flexible connection line as is well known, and supplies a signal to the optical pickup 1006. That is, the flex 1030 is formed in a “U” shape, and one end thereof is fixed to the side surface of the pickup 1006 on the sub shaft 1007b side, and is connected to an electronic circuit (not shown) in the pickup 1006, and the other end is opposed. The signal is supplied to the optical pickup 1006 from a pickup control circuit (not shown) by being connected to a connector 1032 provided inside the side surface of the chassis 1002. Further, since the flex 1030 is flexible, it does not serve as a resistance to the radial movement of the optical pickup 1006 disc.
[0013]
  Reference numeral 1002a denotes a chassis fixing portion which is bent from the side surface of the chassis 1002 and is owned by three, and in particular, one is provided near each of the spindle motor 1003 and the traverse motor 1008. These chassis fixing portions 1002a are fixed to a frame (not shown) or an exterior (not shown) of the information storage / reproduction device.
[0014]
  The operation of the optical disk apparatus configured as described above will be described below.
[0015]
  First, the spindle motor 1004 is rotated to rotate the disk 0 placed on the turntable 1003. Subsequently, the lead screw 1018 is rotated by the traverse motor 1025. Thereby, the nut 1027 that engages with the spiral groove 1018a of the lead screw 1018 is fed in the axial direction of the lead screw 1018. Accordingly, the optical pickup 1006 to which the nut 1027 is fixed and is guided by the guide shafts 1007a and 1007b so as to be slidable in the disk radial direction is sent in the disk radial direction. Thus, the information on the track can be read or written by moving the optical pickup 1006 to the vicinity of the track of an arbitrary disk.
[0016]
  As is well known, the disk 0 is usually made of a synthetic resin and has a slight warp when placed on the turntable 1003. The optical pickup 1006 has an optical axis tilt adjustment residual, the spindle motor 1004 has an axis tilt, and the chassis 1002 has a warp. Due to this warpage, axis tilt, and adjustment residual, the normal of the disk surface and the optical axis of the optical pickup 1006 have an inclination. This inclination has a correlation with the fluctuation component jitter in the time axis direction of the reproduction signal. The jitter increases as the inclination increases, and the increase increases as the inclination increases. Therefore, in order to ensure a system margin, it is necessary to make the inclination of the guide shaft with respect to the disk 0 as small as possible.
[0017]
  In order to adjust the relative inclination between the optical pickup 1006 and the disk 0 and to ensure a system margin, first, a right angle with the radial direction of the disk 0 parallel to the guide shaft (hereinafter referred to as the radial direction (R direction)). Two adjustment screws 1010 and 1015 at both ends of the subshaft 1007b so that the guide shaft is kept parallel so that the inclination in the right direction (hereinafter referred to as the tangential direction (T direction)) is corrected. At the same time, fine adjustment is performed in the T direction. Further, in order to correct the tilt adjustment in the R direction, the rear ends of the shafts are simultaneously finely moved up and down by adjusting screws 1017 and 1010 at the disk outer peripheral ends of the main shaft 1007a and the sub shaft 1007b, thereby adjusting the R direction. With the tilt adjustment mechanism for adjusting the tilt, the relative tilt between the optical pickup 1006 and the disk can be adjusted, and the system margin can be secured.
[0018]
  The adjustment screw 1015 is screwed into a shaft receiver 1011 fixed to the chassis 1002 with a screw 1016. When the adjustment screw 1015 rotates, the height of the tip of the adjustment screw 1015 changes with respect to the chassis 1002. The guide shaft 1006 is pushed upward by the spring 1014 at the outer peripheral end of the disk and is pressed against the adjustment screw 1015. Therefore, when the height of the tip of the adjustment screw 1015 changes, the height of the guide shaft 1006 that is in contact with the tip changes. Since one end of the guide shaft 1006 is fixed on the inner peripheral side of the disk, the guide shaft 1006 rotates in the vertical direction with the fixed end as a fulcrum, thereby changing the inclination with respect to the disk. With the tilt adjustment mechanism for adjusting the tilt, the relative tilt between the optical pickup 1006 and the disk can be adjusted, and the system margin can be secured.
[0019]
[Problems to be solved by the invention]
  However, the conventional configuration described above has the following problems.
[0020]
  First, in order to correct the tilt between the optical axis of the optical pickup and the recording surface of the optical pickup in the tangential (T) direction of the disc, the adjustment screws are simultaneously adjusted with the same amount of movement at the two ends of the sub shaft. When adjusting for repair, etc., it is difficult to adjust and takes a long time to adjust, and even when adjusting with a production jig, etc., the production jig apparatus can be large and complicated, so the production jig apparatus becomes expensive. Had the problem of becoming.
[0021]
  Next, when the chassis is made of synthetic resin in order to reduce the size and weight of the device and to reduce the price in accordance with the support for portable devices, the reaction force of the adjustment spring is always applied to the chassis, so deformation due to synthetic resin creep As a result, the adjustment is deviated, which makes it difficult to secure a system margin.
[0022]
  The present invention solves the above-mentioned conventional problems, and provides an optical disc apparatus that can be easily adjusted, shorten the adjustment time, can be simplified in adjustment equipment, and can be reduced in size, weight, and cost. With the goal.
[0023]
[Means for Solving the Problems]
  In order to achieve this object, the optical disc apparatus of the present invention
Rotation driving means for rotationally driving the disk-shaped recording medium, optical pickup means for reproducing or recording / reproducing signals of the disk-shaped recording medium, and moving the optical pickup means in the radial direction of the disk-shaped recording medium Moving means, guide means for guiding the movement of the optical pickup means, and a chassis member in which the rotation driving means, the optical pickup means, the moving means, and the guide means are disposed. A first shaft member fitted to a bearing portion of the optical pickup means; a second shaft member disposed substantially parallel to the first shaft member; and at both ends of the second shaft member Is fixed with a cylindrical cam member formed with an eccentric hole for fitting with the second shaft member, and the first cam member is rotated by rotating the cam member. By changing the height of the second shaft member relative to the shaft member, the optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording medium can be adjusted with respect to the tangential direction of the disc-shaped recording medium, The first and second shaft members are held by U-shaped first and second holding members that sandwich one end of the outer periphery of the disk-shaped recording medium, and the first and second holding members are And an adjusting screw for adjusting the height of the first and second shaft members on the holding member side, and the shaft member is inclined by the adjusting screw with respect to the radial direction of the disc-shaped recording medium. Adjusting the optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording mediumOf the cam members fixed to both ends of the second shaft member, a convex portion is formed on the end surface of one of the cam members so as to fit with the hole formed in the chassis member. A plurality of radial projections are formed at equiangular intervals on the surface that is in pressure contact with the chassis member other than the portion, and at least one projection is opposed to the chassis member so as to engage with the radial projection. Formed on the surfaceIt is the composition to do.
[0024]
  With this configuration, the relative inclination between the optical pickup and the disk can be easily adjusted, the adjustment time can be shortened, and simplification can be realized in the adjustment equipment.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, an optical disk device according to an embodiment of the present invention will be described with reference to the drawings.
[0026]
  (Embodiment 1)
  FIG. 1 is a plan view from the upper part (that is, the disk mounting surface side) of the optical disk apparatus according to the first embodiment of the present invention, FIG. 2 is a perspective view of the structure from the lower part, and FIG. 3 is an engagement between an optical pickup and a lead screw. 4 is a perspective view showing the structure of the drive portion and the second shaft portion, FIG. 5 is a perspective view showing the second shaft portion, FIG. 6 is a perspective view showing the cam A, and FIG. FIG. 8 is a perspective view showing a first shaft member and an optical pickup, and FIG. 9 is a perspective view showing an adjustment structure of the first shaft portion.
[0027]
  In FIGS. 1, 2 and 3, reference numeral 10 denotes a chassis member on which traverse parts are arranged, which is a molded product of synthetic resin. A spindle motor 12 is fixed to the chassis member 10 by press-fitting a turntable 11 serving as a rotational drive means with a shaft. The chassis member 10 is provided with a pair of first shaft member 13 and second shaft member 14 which are guide means.
[0028]
  The first shaft member 13 and the second shaft member 14 support the optical pickup means 16 for reproducing or recording information from the disk 0 which is a disk-shaped recording medium so as to be slidable in the radial direction of the disk 0. ing.
[0029]
  As shown in FIG. 3, a leaf spring member 17 is fixed to the optical pickup means 16 with a screw 18, and a nut 19 is sandwiched between the leaf spring member 17. A part of the leaf spring member 17 is formed with a “U” shape, and is in contact with the first shaft member 13 with a curved portion 17 a of the “U” shape. This is intended for electrical connection between the first shaft member 13 and the optical pickup means 16. Even if the chassis member 10 is made of synthetic resin and has no electrical continuity, the electrical connection between the spindle motor 12 and the optical pickup means 16 can be established via the ground connection member 20 at the inner circumferential end of the first shaft member 13. Yes, so-called grounding can be taken for countermeasures against static electricity and unnecessary radiation.
[0030]
  By the way, the nut 19 is provided substantially in parallel with the first shaft 13 and is engaged with a lead screw 20 constituting a moving means having a spiral groove formed on a cylindrical surface. As shown in FIGS. 2 and 4, a screw gear 22 constituting a moving means is fixed to one end of the lead screw 20, and the screw gear 22 is attached to a motor shaft 24 of a motor member 23 constituting the moving means. It meshes with a motor gear 25 that is one of the press-fitted moving means, and the rotational force from the motor member 23 is decelerated and transmitted to the screw gear 22 via the relay gear 26 that meshes with the motor gear 23 and transmitted to the lead screw 20. Yes. The motor member 23, the relay gear 26, and the screw gear 22 are disposed in each groove portion formed in the chassis member 10, and the vertical position is regulated by the motor cover 27. The motor cover 27 is chassis member by screws 28a and 28b. 10 is fixed.
[0031]
  The basic operation of the optical disk apparatus configured as described above will be described below. First, the spindle motor 12 is rotated to rotate the disk 0 placed on the turntable 11. Subsequently, the lead screw 21 is rotated by the motor member 23 via the motor gear 25, the relay gear 26, and the screw gear 22. Thereby, the nut 19 engaged with the lead screw 21 is sent in the axial direction of the lead screw 21. Along with this, the optical pickup means 16 fixed to the nut 19 and guided by the first shaft member 13 and the second shaft member 14 so as to be slidable in the disk radial direction is sent in the disk radial direction. As a result, the optical pickup means 16 can be moved to the vicinity of an arbitrary track of the disk 0, and information on an arbitrary track of the disk 0 can be read or written.
[0032]
  In recent years, the recording density of disks has been increased, and information storage devices that read and write data have been required to have high accuracy. In the case of an optical disc, it is particularly necessary to increase the tilt accuracy of the disc recording surface and the optical axis of the pickup, and the accuracy of mass-productive processing does not satisfy this requirement.
[0033]
  Next, this adjustment structure will be described with reference to FIGS. D-cut portions 30a and 30b are respectively formed at both ends of the second shaft member 14, and semi-circular groove portions 31 for press-fitting and fixing the D-cut portions 30a and 30b to one end on the inner peripheral side of the disc. A cam member A32 which is one of the cam members formed with is fixed to one end of the second shaft member 14. Similarly, the other end of the second shaft member 14 is fixed with a cam member B34 which is one of the cam members in which the semicircular hole groove portion 33 is formed. The cam member A32 has a hole 36 formed in an adjustment plate spring A35 as a second urging member disposed on the outer periphery of the disk of the second shaft member 14.FittingA cylindrical convex portion 37 is formed, and a hole 38 formed in the chassis member 10 is formed in the cam member B34.FittingA cylindrical convex portion 39 is formed.
[0034]
  In particular, at the center of the cylindrical convex portions 37 and 39 of the cam member A32 and the cam member B34 and both ends of the second shaft member 14.FittingThe centers of the semicircular groove portions 37 and 39 to be joined are eccentric, and by rotating the cam member, the height of the second shaft member 14 can be changed. Adjustment in the T direction with the optical axis of the optical pickup becomes possible. Further, as shown in FIGS. 4, 5 and 6, the radial convex portions 40 are arranged at substantially equal angular intervals on the end surface of the cam member B34 which is in contact with the hole 38 of the chassis member 10 other than the cylindrical convex portion 39. The protrusions 41 are formed in the vicinity of the holes of the chassis member so as to engage with the grooves between the radial protrusions 40. In addition, the cam member B34 has a rectangular convex portion 42 formed on the outer portion thereof, and the shaft can be rotated using the rectangular convex portion 42. Furthermore, a square hole 43 is provided on the end surface of the cylindrical convex portion 39 so that it can be rotated using a wrench or the like. The cam member B34 is biased in the thrust direction of the shaft by the adjusting plate spring A35. Thereby, in order to adjust, it latches for every pitch of the 2nd shaft member 14 and the radial convex part 40, and a click feeling is brought about. Of course, it is needless to say that it is divided into multiple adjustment precisions that do not affect the performance. By this rotation locking, rotation is not shifted due to catching or the like when the jig is released after adjustment with a jig or the like, and stable adjustment can be performed.
[0035]
  By the way, as shown in FIG. 7, the cylindrical convex portion 37 of the cam member A32 has a hole portion 36 formed in the adjustment plate spring A35.FittingThe adjustment plate spring A25 is arranged as if sandwiched by a second holding member 45 made of a “U” -shaped sheet metal provided with an adjustment screw 44, and is formed on the adjustment plate spring A35. The biasing portion 46 is in contact with the “U” -shaped end surface 47 of the second holding member 45, and the adjustment screw 44 is a screw contact portion formed in the second holding member 45. 48, and a biasing force is applied to the inside of the "U" shape of the second holding member 45, so the synthetic resin chassis member is not directly subjected to a spring force, and synthetic resin creep, etc. The deformation of the chassis member 10 due to the above does not occur. Further, the second shaft member 14 is urged in the thrust direction by the urging force of the wall portion 49 formed on the chassis member 10 and the bent portion 50 formed on the adjustment plate spring A35. The second holding member 45 is fixed by a screw 52 at a boss portion 51 formed on the chassis member 10.
[0036]
  Next, as shown in FIGS. 8 and 9, the bearing portion of the optical pickup means 16 andFittingThe cylindrical convex portion 55 formed at one end of the first shaft member 13 to be combined with the hole portion 57 formed in the adjustment plate spring B56 which is the first urging member.FittingThe other end of the first shaft member 13 is connected to a hole 58 formed in the chassis member 10.FittingMatch. The chassis member 10 is provided with a “U” -shaped first holding member 59 so as to hold the adjusting plate spring B 56, and is fixed with screws 61 by a boss portion 60 formed on the chassis member 10. Has been. The first holding member 59 is provided with an adjusting screw 62. The end 63 of the adjusting screw 62 is in contact with the contact surface 64 of the adjusting plate spring B56, and further the first holding member 58 is provided. The U-shaped end surface is in contact with contact portions 65 and 66 formed on the adjustment plate spring B56, and between the contact portion 65, the contact portion 66, and the contact portion 64 of the adjustment screw. The urging force is generated. The regulation of the adjustment plate spring B56 in the shaft axial direction is regulated by a regulation part 67 formed in the chassis member 10. Further, the adjustment plate spring B56 is also urged in the axial direction of the lead screw 21 at the same time by the screw urging surface 68 of the adjustment plate spring B56. Similarly to the second holding member 45 described above, the first holding member 59 is also applied with an urging force inside the “U” shape, so that the chassis member made of synthetic resin is not directly subjected to a spring force. The chassis member 10 is not deformed by the synthetic resin creep or the like.
[0037]
【The invention's effect】
  As described above, the present invention provides a rotational drive means for rotationally driving a disk-shaped recording medium, an optical pickup means for reproducing or recording / reproducing a signal of the disk-shaped recording medium,
Moving means for moving the optical pickup means in the radial direction of the disk-shaped recording medium;,
Guide means for guiding the movement of the optical pickup means;
A chassis member for disposing the rotation driving means, the optical pickup means, the moving means, and the guide means;
Guide handThe stage isA bearing portion of the optical pickup means;FittingA first shaft member to be combined, and a second shaft member disposed substantially parallel to the first shaft member,
  At both ends of the second shaft memberSecondShaft member andFittingA cylindrical cam member formed with an eccentric hole to be joined is fixed, and by rotating the cam memberChanging the height of the second shaft member relative to the first shaft member;Disc-shaped recording mediaTangentialThe optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording medium can be adjusted with respect to the direction.age,
  The first and second shaft members are held by U-shaped first and second holding members that sandwich one end on the outer peripheral side of the disc-shaped recording medium,
  The first and second holding members have an adjusting screw for adjusting the height of the first and second shaft members on the holding member side, and the shaft member is tilted by the adjusting screw so that the disc-shaped recording medium is Adjust the optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording medium with respect to the radial direction.It has a configuration.
[0038]
  With this configuration, the relative inclination between the optical pickup and the disk can be easily adjusted, the adjustment time can be shortened, and simplification can be realized in the adjustment equipment.
[0039]
  Further, among the cam members fixed to both ends of the second shaft member, a hole formed in the chassis member is formed on the end surface of one cam member.MatingA convex portion is formed, and a plurality of radial convex portions are formed at equiangular intervals on the surface that is in pressure contact with the chassis member other than the convex portion. At least one radial convex portion is engaged with the radial convex portion. By forming the convex portions on the opposing surfaces of the chassis member, the rotation does not shift due to catching or the like when the jig is released after adjustment with the jig or the like, and stable adjustment can be performed.
[0040]
  The first and second holding members, the first and second holding members, and the one ends of the first and second shaft members having a “U” shape sandwiching one ends of the first and second shaft members. When the chassis is made of synthetic resin in order to reduce the size and weight of the device and to reduce the price by configuring the first and second urging members disposed on the holding member as if urging However, since the reaction force of the adjusting spring is not applied to the chassis, an excellent effect can be obtained that the margin of the system can be secured without the adjustment being shifted due to the deformation caused by the synthetic resin creep.
[Brief description of the drawings]
FIG. 1 is a plan view from the top of an optical disk device according to a first embodiment of the present invention.
FIG. 2 is a perspective view of the configuration from the bottom.
FIG. 3 is a perspective view showing an engagement means between the optical pickup and the lead screw.
[Fig. 4] The drive unit andAndConfiguration perspective view of second shaft portion
FIG. 5 is a perspective view showing the second shaft portion.
FIG. 6 is a perspective view showing the cam A.
7 is a side view showing an adjustment structure of a second shaft portion in the first embodiment. FIG.
FIG. 8 is a perspective view showing a first shaft member and an optical pickup in the first embodiment.
FIG. 9 is a perspective view showing an adjustment structure of a first shaft portion in the first embodiment.
FIG. 10 is a perspective configuration diagram of a conventional optical disc apparatus.
FIG. 11 is a schematic sectional view of the same.
[Explanation of symbols]
  10 Chassis members
  12 Spindle motor
  13 First shaft member
  14 Second shaft member
  15 discs
  16 Optical pickup means
  17 Leaf spring member
  19 Nut
  20 Earth connection member
  21 Lead screw
  22 Screw gear
  23 Motor member
  25 Motor gear
  26 Relay gear
  27 Motor cover
  32 Cam member A
  34 Cam member B
  35 Adjusting leaf spring A
  40 Radial convex part
  45 Second holding member
  56 Adjusting leaf spring B
  59 First holding member

Claims (2)

Rotation driving means for rotationally driving the disk-shaped recording medium, optical pickup means for reproducing or recording / reproducing signals of the disk-shaped recording medium, and moving the optical pickup means in the radial direction of the disk-shaped recording medium Moving means, guide means for guiding the movement of the optical pickup means, and a chassis member for disposing the rotation driving means, the optical pickup means, the moving means, and the guide means,
The guide means includes a first shaft member that fits with a bearing portion of the optical pickup means, and a second shaft member that is disposed substantially parallel to the first shaft member,
Cylindrical cam members each having an eccentric hole that is fitted to the second shaft member are fixed to both ends of the second shaft member. By rotating the cam member, By changing the height of the second shaft member relative to the one shaft member, the optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording medium can be adjusted with respect to the tangential direction of the disc-shaped recording medium. ,
The first and second shaft members are held by U-shaped first and second holding members that sandwich one end on the outer peripheral side of the disc-shaped recording medium,
The first and second holding members have adjustment screws for adjusting the height of the first and second shaft members on the holding member side, and the shaft members are inclined by the adjustment screws. Adjusting the optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording medium with respect to the radial direction of the disc-shaped recording medium ;
Of the cam members fixed to both ends of the second shaft member, a convex portion is formed on the end surface of one cam member so as to be fitted with a hole formed in the chassis member. A plurality of radial protrusions are formed at equiangular intervals on the surface in pressure contact with the chassis member, and at least one protrusion is opposed to the chassis member so as to engage with the radial protrusion. An optical disc apparatus characterized in that the optical disc apparatus is formed in the following manner . Rotation driving means for rotationally driving the disk-shaped recording medium, optical pickup means for reproducing or recording / reproducing signals of the disk-shaped recording medium, and moving the optical pickup means in the radial direction of the disk-shaped recording medium Moving means, guide means for guiding the movement of the optical pickup means, a chassis member in which the rotation driving means, the optical pickup means, the moving means, and the guide means are disposed, and the moving means includes the first member A lead screw having a spiral groove formed on a cylindrical surface substantially parallel to the shaft member, a driving means for rotationally driving the lead screw, and an optical pickup means, and being engaged with the spiral groove and having a driving force Engaging means for transmitting from the lead screw to the optical pickup means,
The guide means includes a first shaft member that fits with a bearing portion of the optical pickup means, and a second shaft member that is disposed substantially parallel to the first shaft member,
Cylindrical cam members each having an eccentric hole that is fitted to the second shaft member are fixed to both ends of the second shaft member. By rotating the cam member, By changing the height of the second shaft member relative to the one shaft member, the optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording medium can be adjusted with respect to the tangential direction of the disc-shaped recording medium. ,
The first and second shaft members are held by U-shaped first and second holding members that sandwich one end on the outer peripheral side of the disc-shaped recording medium,
The first and second holding members have adjustment screws for adjusting the height of the first and second shaft members on the holding member side, and the shaft members are inclined by the adjustment screws. Adjusting the optical axis of the optical pickup means relative to the recording surface of the disc-shaped recording medium with respect to the radial direction of the disc-shaped recording medium;
The optical disk apparatus according to claim 1, wherein the first urging member is configured to urge one end face of the lead screw in a thrust direction together with the urging of the first shaft member .

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