JP2011134369A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device which is small in size and is easy to assemble, and reads and/or writes information with high accuracy. <P>SOLUTION: In the optical disk device, a winding 71 is fitted into a spring holder 62 with a torsion spring 7 being compressed. A pressing leg 73 contacts an adjusting spring 64 between a tip end of a guide shaft 4 and a shaft support 60 from the opposite side thereof, while a support leg 72 is engaged with an engaging portion 63. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus provided with a pressing mechanism that is engaged with an optical pickup and presses a guide shaft that guides the sliding of the optical pickup.

  A conventional optical disc apparatus will be described with reference to the drawings. FIG. 11 is a schematic diagram of a conventional optical disc apparatus. The optical disk apparatus is mounted on a traverse chassis 91, an output shaft of a motor fixed to the traverse chassis 91, and is slidably supported on the traverse chassis 91, and irradiates the optical disk with light. And an optical pickup 93 for reading information (hereinafter sometimes referred to as “reading” or the like).

  The optical pickup 93 moves in the radial direction (radial direction) of the optical disc while irradiating the recording surface of the rotating optical disc with the light focused by the objective lens (spot light). Is moved and reading is performed. In the optical disc apparatus B, the traverse chassis 91 is provided with a pair of guide shafts 94, and the guide shafts 94 guide the sliding of the optical pickup 93.

  If the track of the optical disk is thin and the guide shaft 94 floats or tilts, the optical pickup tilts with respect to the optical disk, light is irradiated to the wrong track, aberration occurs, and reading, etc. is performed accurately. It may disappear.

  Conventionally, in the optical disc apparatus B, in order to prevent the guide shaft 94 from floating or tilting, both ends of the guide shaft 94 are urged toward the traverse chassis 91 using the torsion spring 95 and the traverse chassis is used. A structure in which a guide shaft 94 is supported by a screw 96 provided in 91 is employed.

  A guide shaft support structure will be described with reference to the drawings. FIG. 12 is an enlarged view of the shaft support portion of the conventional optical disc apparatus shown in FIG. 11 viewed from the axial direction of the guide shaft. As shown in FIG. 12, the torsion spring 95 includes a winding portion 951 around which a metal wire (usually a steel wire) is wound, and a linear leg portion 952 in which one end of the winding portion 951 is extended. And a linear arm portion 953 obtained by extending the other end portion of the winding portion 951.

  As shown in FIG. 12, the winding portion 951 is fitted on the guide shaft 94, and the leg portion 952 and the arm portion 953 are engaged with a part of the traverse chassis 91. The torsion spring 95 is attached to the guide shaft 94 in a compressed state (the leg portion 952 and the arm portion 953 are brought close to each other), and the leg portion 952 and the arm portion 953 have a restoring force (elastic force) of the torsion spring 95. Then, the engaging portion with the traverse chassis 1 is pressed.

  At this time, the leg portion 952 and the arm portion 953 receive a reaction force from the engaging portion with the traverse chassis 1. As a result, the winding portion 951 of the torsion spring 95 biases the guide shaft 94 toward the traverse chassis 1. On the other hand, the tip of the screw 96 supports the guide shaft 94, and the distance between the guide shaft 94 and the traverse chassis 1 is adjusted by adjusting the length of the tip of the screw 96 from the traverse chassis 91.

  As described above, in the conventional optical disc apparatus, the guide shaft 94 is prevented from being lifted by being biased by the torsion spring 95, and the guide shaft 94 is adjusted by adjusting the protruding amount of the screw 96 from the traverse chassis 91. As a result, the inclination of the optical pickup 93 is adjusted.

  As an optical disk device having a configuration in which a guide shaft is pressed using a torsion spring, for example, JP 2006-127675 A and JP 2005-63631 A are described. In the torsion springs described in these inventions, the winding portion is held by a spring holding portion formed in the chassis, the fixing portion which is one end portion of the torsion spring is engaged with the chassis, and the guide is provided at the other end portion. It is configured to hold the shaft.

JP 2006-127675 A JP 2005-63631 A

  In the conventional optical disk apparatus, the torsion spring 95 has a structure in which the winding portion 951 is fitted on the guide shaft 94 and the leg portion 952 and the arm portion 953 are engaged with a part of the traverse chassis 951. In the torsion spring 95 having such a structure, in order to press the guide shaft 94 toward the traverse chassis 91 by the winding portion 951, the leg portion 952 and the arm portion 953 are engaged from the opposite side of the guide shaft 94 of the traverse chassis 91. It is necessary to match. In the case of this configuration, the torsion spring 95 must be attached at the same time when the guide shaft 91 is attached to the shaft support portion, and the assembling work of the torsion spring 95 becomes complicated.

  In recent years, optical disc apparatuses capable of writing on large-capacity Blu-ray discs have increased, and the amount of information exchanged with the optical pickup 93 has increased in order to read and write information. As a result, a flexible flat cable (FFC) 935 attached to the optical pickup 93 has a wide width.

  The FFC 935 is disposed between the pair of guide shafts 94 and 94 in order to follow the movement of the optical pickup 93, but the leg portion 952 and / or the arm portion 953 of the torsion spring 95 are arranged on the guide shaft 94. If the width of the FFC 935 is increased, the leg portion 952 or the arm portion 953 is likely to interfere. Thereby, the movement of the optical pickup 93 may be restricted or the FFC 935 may be damaged.

  Further, in the optical disk device shown in FIG. 11 and the optical disk devices shown in Patent Documents 1 and 2, the pressing point at which the spring presses the guide shaft toward the traverse chassis and the tip of the screw that adjusts the height of the guide shaft are in contact. The supporting point to be supported is formed so as to be shifted in the axial direction of the guide shaft. A bending moment is generated in the guide shaft when the pressing point and the supporting point are displaced in the axial direction. Due to this bending moment, the guide shaft is bent near the center, and the accuracy of the operation of the optical pickup may be lowered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disc apparatus that is small in size and can be easily assembled and that can read and / or write information with high accuracy.

  To achieve the above object, the present invention provides a pair of guide shafts that slidably support an optical pickup, a traverse chassis, a shaft support that supports both ends of the guide shaft, and the shaft support. An optical disk apparatus having a torsion spring that is attached and presses the guide shaft toward the traverse chassis, wherein the torsion spring is wound in a spiral shape and one end of the winding part A pressing leg that protrudes in the normal direction, and a support leg that protrudes in the normal direction from the other end of the winding portion, and the shaft support is orthogonal to the guide shaft. A shaft support portion for supporting the guide shaft, a spring holding portion formed in parallel with the axial direction of the guide shaft, and the traverse shaft sandwiching the guide shaft And an adjusting screw for adjusting the distance between the guide shaft and the traverse chassis, the torsion spring is compressed, and the winding portion is It is fitted to a spring holding part, and the pressing leg part comes into contact with the adjusting screw between the tip of the guide shaft and the shaft support part from the opposite side, and the support leg part is engaged with the engaging part. It is characterized by that.

  According to this configuration, since the engagement portion with which the support leg portion of the torsion spring is engaged is provided on the opposite side of the traverse chassis across the guide shaft, the width of the shaft support portion in the direction orthogonal to the guide shaft is provided. It can be made smaller.

  The space between the shaft support portions that hold the end portions of the pair of guide shafts can be increased. Accordingly, since an optical pickup for writing information on the optical disk is used, even if the width of the flexible flat cable is increased, it is difficult to interfere with the shaft support portion.

  In addition, the entire torsion spring is disposed on the side of the traverse chassis where the guide shaft is attached, and the winding portion of the torsion spring does not have to be fitted to the guide shaft. Easy to install.

  Thereby, the effort and time of attachment of the torsion spring can be saved. Moreover, since it can be easily attached, variations in attachment are unlikely to occur, and it is possible to suppress inconvenience that the pressure on the guide shaft is incomplete or easy to remove.

  The said structure WHEREIN: The distance from the front-end | tip of the press part pressed from the said press leg part of the said guide shaft may be the same as the distance from the front-end | tip of the support part supported by the said adjustment screw of the said guide shaft. .

  According to this configuration, since the pressing point by the torsion spring and the supporting point by the adjusting screw are brought together in the axial direction of the guide shaft, a shear force is applied to the guide shaft by shifting the pressing point and the supporting point. And / or bending moment can act and it can control that the guide shaft will bend.

  As a result, it is possible to suppress problems that the operation of the optical pickup becomes unstable or the guide shaft is tilted by bending.

  The said structure WHEREIN: The said spring holding | maintenance part and the said engaging part may be formed toward the mutually opposite direction.

  In the above configuration, the engagement portion may be formed integrally with the shaft support portion.

  The said structure WHEREIN: The front-end | tip of the said spring holding part may be provided with the convex part protruded in the direction orthogonal to the said traverse chassis.

  The said structure WHEREIN: The front-end | tip of the said engagement part may be provided with the engagement convex part which protrudes in the side with which the said engagement leg part is engaged.

  The said structure WHEREIN: The structure formed integrally with the said traverse chassis may be sufficient as the said shaft support part.

  The said structure WHEREIN: The said spring holding | maintenance part may be formed outside the area | region pinched | interposed into a pair of said guide shaft.

  According to the present invention, it is possible to provide an optical disc apparatus that is small in size, can be easily assembled, and can read and / or write information with high accuracy.

1 is a schematic diagram of an example of an optical disc apparatus according to the present invention. It is the top view to which the shaft support part of the optical disk device shown in FIG. 1 was expanded. It is the side view to which the shaft support part of the optical disk device shown in FIG. 1 was expanded. It is the enlarged view which looked at the shaft support part of the optical disk apparatus shown in FIG. 1 from the axial direction of the guide shaft. It is a top view of the state in the middle of attachment of a torsion spring. It is a side view of the state in the middle of attachment of a torsion spring. It is the figure seen from the axial direction of the state in the middle of attachment of the torsion spring. It is a top view of the state in the middle of attachment of a torsion spring. It is a top view of the state in the middle of attachment of a torsion spring. It is a top view of the state in the middle of attachment of a torsion spring. It is the schematic of the conventional optical disk apparatus. It is the enlarged view which looked at the shaft support part of the conventional optical disk apparatus shown in FIG. 11 from the axial direction of the guide shaft.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of an example of an optical disc apparatus according to the present invention. As shown in FIG. 1, an optical disc apparatus A includes a traverse chassis 1, a turntable 2 attached to the traverse chassis 1 for rotating the optical disc, and an optical pickup 3 for irradiating the optical disc rotated by the turntable 2 with laser light. And.

  The traverse chassis 1 is formed by cutting and bending a metal plate into a rectangular shape in plan view. The traverse chassis 1 is held at four corners by a main chassis (not shown) via a damper member 11. The damper member 11 is a member that alleviates transmission of vibrations and shocks from the main chassis to the traverse chassis 1 or vice versa, and is formed of an elastically deformable material. The traverse chassis 1 has a rectangular opening 10 in the center. In addition, although the traverse chassis 1 has illustrated what was formed by cutting and bending a metal plate, it is not limited to it and may be a resin molded body.

  The traverse chassis 1 has a motor (not shown) attached and fixed near the center of one short side of the opening 10. The output shaft of the motor extends in a direction perpendicular to the upper surface of the traverse chassis 1, and the turntable 2 is fixed to the tip of the output shaft. The turntable 2 is fixed to the output shaft so that the central axis serving as the rotation center overlaps the output shaft. Thereby, when the motor rotates, the turntable 2 also rotates. The turntable 2 includes a placement portion 21 for placing an optical disc, and a convex portion 22 that passes through an opening formed in the center of the optical disc. The turntable 2 is configured to sandwich the optical disk with a clamper (not shown).

  In the traverse chassis 1, two guide shafts 4, which are a main shaft 41 for guiding the optical pickup 3 and a sub shaft 42, are arranged in parallel. Both ends of the main shaft 41 and the sub shaft 42 are supported by a shaft support portion 6 provided in the traverse chassis 1. A torsion spring 7 is attached to the shaft support 6. The guide shaft 4 (41, 42) is arranged so as to cross the opening 10 in the longitudinal direction. The support of the guide shaft 4 will be described later.

  As shown in FIG. 1, the optical pickup 3 holds a pickup base 31, a laser optical system including an objective lens 32 disposed to face the information recording surface of the optical disc, and the objective lens 32, and provides a track direction and a focus direction. For exchanging information with the objective lens holder 33 that moves to the substrate, a substrate 34 for exchanging control and reading or writing information of the optical pickup 3, and a main substrate (not shown) of the optical disk apparatus connected to the substrate 34. FFC35.

  The pickup base 31 has a bearing portion 311 that fits on one guide shaft 4 (main shaft 41) and an engagement portion 312 that engages the other guide shaft 4 (sub shaft 42). The bearing portion 311 is fitted in the main shaft 41 with little play, and the engagement portion 312 is partially open and is engaged with the other guide shaft 42 with much play.

  Further, the pickup base 31 includes a rack piece 313 that protrudes in the direction perpendicular to the sliding direction of the pickup 3 in the vicinity of the bearing portion 311. A rack claw is formed on the rack piece 313 and meshes with a spiral groove formed on the outer surface of the lead screw 51 supported by the traverse chassis 1 so as to be parallel and rotatable with the guide shaft 4. The lead screw 51 is connected to a drive motor 52 fixed to the traverse chassis 1, and rotates when the drive motor 52 is driven. As the lead screw 51 rotates, the rack piece 313 is sent to the spiral groove of the lead screw 51 and moves in the axial direction. Accordingly, the optical pickup 3 to which the rack piece 313 is attached is slid along the guide shaft 4.

  As shown in FIG. 1, the optical pickup 3 is guided by two guide shafts 4 (41, 42), slides on the turntable 2, and approaches or separates. The sliding direction of the optical pickup 3 is the radial direction (radial direction) of the optical disk.

  The support of the guide shaft 4 by the shaft support 6 will be described with reference to the drawings. 2 is an enlarged plan view of the shaft support portion of the optical disc apparatus shown in FIG. 1, FIG. 3 is an enlarged side view of the shaft support portion of the optical disc apparatus shown in FIG. 1, and FIG. 4 is an optical disc shown in FIG. It is the enlarged view which looked at the shaft support part of the apparatus from the axial direction of the guide shaft. 2, 3, and 4, for convenience, only the shaft support portion 6 that supports one end portion of the main shaft 41 is shown, but the other support portions have the same configuration.

  First, the torsion spring 7 will be described. As shown in FIGS. 2 to 4, the torsion spring 7 includes a winding portion 71 formed by winding a metal wire (for example, a steel wire) in a coil shape, and an end portion of the winding portion 71 is tangent to the winding portion 71. A supporting arm portion 72 and a pressing arm portion 73 formed by extending in the direction are provided. The torsion spring 7 is a spring that exerts an elastic force so as to return to the original when the angle of the support arm portion 72 and the pressing arm portion 73 is changed. In the present embodiment, the support arm 72 and the pressing arm 73 are attached to the shaft support 6 in a deformed state so as to approach each other.

  Further, the shaft support portion 6 is formed by cutting and bending a part of the traverse chassis 1. The shaft support portion 6 is configured so that the shaft support portion 60 having a through hole 600 through which the guide shaft 4 (41) passes and the tip end portion of the guide shaft 4 come into contact with each other so that the guide shaft 4 (41) moves in the axial direction. The movement restricting portion 61 for restricting, the spring holding portion 62 for holding the winding portion 71 of the torsion spring 7, the engaging portion 63 for engaging the support arm portion 72 which is a part of the torsion spring 7, and the guide shaft 4 And (41) an adjustment screw 64 for adjusting the distance and inclination of the traverse chassis 1.

  The shaft support portion 60 is a flat plate member orthogonal to the axial direction of the guide shaft 4 (41), and is formed upright from the upper surface of the traverse chassis 1. The through hole 600 is formed in the center of the shaft support portion 60 and is a rectangular through hole whose longitudinal direction is a direction orthogonal to the upper surface of the traverse chassis 1. The movement restricting portion 61 is a flat plate-like member orthogonal to the axial direction of the guide shaft 4 (41), and stands up from the upper surface of the traverse chassis 1. The movement restricting portion 61 is formed to be parallel to the shaft support portion 60.

  The spring holding portion 62 is a rod-like member extending from the end portion toward the central portion in the axial direction of the guide shaft 4 (41). The tip of the spring holding portion 62 includes a convex portion 621 that protrudes on the opposite side of the traverse chassis 1. When the winding part 71 moves to the front end side of the spring holding part 62 because the winding part 71 of the torsion spring 7 is fitted on the spring holding part 62 and the convex part 621 is formed. It contacts with the convex part 621 and is prevented from falling off from the spring holding part 62 of the torsion spring 7. In addition, the spring holding part 62 including the convex part 621 is a size in which the winding part 71 can be fitted. In order to have a drop-off preventing effect, it is preferable that the convex portion 621 protrudes on the side opposite to the traverse chassis 1.

  The engaging part 63 is formed so as to protrude from the shaft support part 60 to the side opposite to the spring holding part 62. The engaging portion 63 is formed farther from the traverse chassis 1 than the guide shaft 4 (41). The distal end of the engaging portion 63 is provided with an engaging convex portion 631 that protrudes toward the guide shaft 4 (41), and engages the engaging portion 63 while urging a force from the guide shaft 4 (41) side. The supporting arm portion 72 is prevented from falling off. The spring holding part 62 and the engaging part 63 are arranged in parallel.

  The adjustment screw 64 is screwed into a screw hole 640 formed in the bottom surface of the shaft support portion 6. The screw hole 640 is formed at a position overlapping the guide shaft 4 (41) in a plan view. By screwing the adjustment screw 64, the tip of the adjustment screw 64 moves and pushes the guide shaft 4. The distance between the guide shaft 4 (41) and the traverse chassis 1 is adjusted by being pushed by the tip of the adjustment screw 64.

  As shown in FIGS. 2 to 4, the winding portion 71 is fitted on the spring holding portion 62, the support arm portion 72 is engaged with the engaging portion 63, and the pressing arm portion 73 is in contact with the guide shaft 4 (41). is doing. When the torsion spring 7 is attached to the shaft support portion 6, the torsion spring 7 is deformed and attached so that the support arm portion 72 and the pressing arm portion 73 approach each other. Exhibits elasticity in the return direction). At this time, since the support arm portion 72 is engaged with the engagement portion 63, the pressing arm portion 73 pushes the guide shaft 4 downward (in the direction toward the upper surface of the traverse chassis 1) by the elastic force of the torsion spring 7. .

  As shown in FIGS. 2 and 3, the pressing portion by the pressing arm portion 73 of the guide shaft 4 (41) overlaps with the adjusting screw 64 and the axial direction of the guide shaft 4 (41). Thus, the point of application of the force from the pressing arm portion 73 of the guide shaft 4 (41) and the support point by the adjusting screw 64 overlap in the axial direction of the guide shaft 4 (41). ) Can be suppressed, and the bending of the guide shaft 4 (41) can be suppressed.

  As shown in FIGS. 2 and 4, in the optical disk apparatus A using the torsion spring 7, the torsion spring 7 is not attached across the guide shaft 4 unlike the conventional optical disk apparatus. Thereby, even if the torsion spring 7 is attached, there is no member that prevents the movement of the FFC 35 between the two guide shafts 4 (41, 42). Therefore, even if the width of the FFC 35 is widened, the handling of the FFC 35 is changed. The optical pickup 3 can be attached to the traverse chassis 1 without any problem.

  Next, an example of a procedure for attaching the torsion spring 7 to the shaft support 6 will be described with reference to the drawings. FIG. 5 to FIG. 8 show diagrams at each stage during the attachment of the torsion spring. FIG. 5 is a plan view in which the winding portion of the torsion spring is fitted to the convex portion, and FIG. 6 is a diagram in which the pressing arm portion of the torsion spring is brought into contact with the guide shaft and the winding portion is fitted into the spring holding portion. FIG. 7 is a side view of the guide shaft as viewed from the axial direction of the guide shaft in a state where the support arm is biased toward the guide shaft and deformed, and FIG. 8 is a side view of the state in which the support arm is pressed. It is. In addition, the shaft support part shown here is only the shaft support part 6 which supports one end part of the main shaft 41 for convenience, but it is possible to attach a torsion spring in the same manner in other support parts as well. It is.

  As shown in FIG. 5, the pressing leg portion 73 is disposed between the portion of the guide shaft 4 (41) protruding from the shaft support portion 60 and the engaging portion 63, and the winding portion 71 is attached to the convex portion 621. At this time, the support leg 72 is disposed on the opposite side of the guide shaft of the spring holding part 62, and no force is acting on the torsion spring 7 in the torsion direction, and the pressing leg 73, the support leg 72, The angle between is large.

  As shown in FIG. 6, the winding part 71 is moved from the convex part 621 to the back side of the spring holding part 62 (in the direction of the arrow in the figure). The pressing leg portion 73 is disposed so as to contact a portion protruding from the shaft support portion 60 of the guide shaft 4 (41). At this time, similarly to the state shown in FIG. 5, the support leg portion 72 has a large angle with the pressing leg portion 73 and cannot be engaged with the lower portion of the engaging portion 63 as it is.

  Therefore, as shown in FIG. 7, the support leg 72 is moved in the direction approaching the press leg 73 (in the direction of the arrow in the figure) with the press leg 73 in contact with the guide shaft 4 (41). . Thereby, the support leg 72 can go around the guide shaft 4 from the tip of the engaging portion 63. At this time, the torsion spring 7 (particularly the winding portion 71) is elastically deformed by a force applied in the torsion direction.

  Thereafter, as shown in FIG. 8, the torsion spring 7 is directed toward the shaft support portion 60 in a state where the pressing leg portion 73 is in contact with the guide shaft 4 (41) while maintaining the state where the torsion spring 7 is elastically deformed. The supporting leg 72 is brought into contact with the engaging portion 63 from the guide shaft 4 (41) side. As a result, the support leg portion 72 engages with the engagement portion 63. At this time, the pressing leg portion 73 comes into contact with the guide shaft 4 at a position overlapping with the adjusting screw 64 and the guide shaft 4 (41) in the axial direction.

  As described above, the torsion spring 7 is attached to the shaft support portion 6 with the winding portion 71 elastically deformed. The support leg 72 is in contact with the engaging part 63 and the pressing leg 73 is in contact with the guide shaft 4 (41). The elastic force due to the deformation of the winding part 71 acts in the direction in which the support leg 72 and the pressing leg 73 are separated from each other, the support leg 72 is the engaging part 63, and the pressing leg 73 is the guide shaft 4 (41 )Press. The support leg 72 urges the engaging portion 63 away from the guide shaft 4 (41), and even if it moves to the distal end side of the engaging portion 63, the support shaft 72 starts from the distal end of the engaging portion 63. 4 (41) is prevented from being disengaged from the engaging portion 63 by being obstructed by the engaging convex portion 631 erected toward 4 (41).

  The pressing leg 73 pushes the guide shaft 4 (41) obliquely, but the through-hole 600 of the shaft support portion through which the guide shaft 4 (41) passes extends in a direction perpendicular to the upper surface of the traverse chassis 1. Since the guide shaft 4 (41) is guided in the through hole 600, the force of the pressing leg 73 acts in a direction perpendicular to the upper surface of the traverse chassis 1. As shown in FIG. 2 and the like, the pressing leg 73 is disposed at a position overlapping the adjusting screw 64 and the guide shaft 4 (41) in the axial direction, and therefore acts on the guide shaft 4 from the pressing leg 73. Since the pressing force applied and the support reaction force due to the support of the adjusting screw 64 overlap in the axial direction of the guide shaft 4 (41), it is possible to suppress the bending moment from acting on the guide shaft 4 (41). .

  In the optical disk apparatus of the present invention, the shaft support portion 6 that supports and presses the guide shaft 4 only protrudes by the amount of the spring holding portion 62 in the direction orthogonal to the axis of the guide shaft 4. It is possible to As a result, the width between the two guide shafts 4 can be increased without changing the size of the traverse chassis 1. As a result, the FFC 35 can be disposed between the two guide shafts 4 even if the width of the FFC 35 that connects the substrate 34 mounted on the optical pickup 3 and the external substrate is widened, and the optical pickup 3 is stabilized. Can be driven.

  The torsion spring 7 is symmetrical about the winding part 71, and the support leg 72 and the pressing leg 73 are formed to have the same shape, so that the torsion spring 7 is supported by the shaft regardless of the direction. It can be attached to the part 6. Thereby, the assembly of the torsion spring 7 becomes easy, and it is possible to reduce the labor and time of manufacture.

  Next, another example of the procedure for attaching the torsion spring 7 to the shaft support 6 will be described with reference to the drawings. 9 and 10 are plan views in the middle of the procedure for attaching the torsion spring to the shaft.

  As shown in FIG. 9, the winding portion 71 of the torsion spring 7 is engaged with the convex portion 621 of the spring holding portion 62, and the support leg portion 72 and the pressing leg portion 73 are brought closer to compress the torsion spring 7. The winding part 71 is moved from the convex part 621 to the spring holding part 62 in a state where the support leg part 72 and the pressing leg part 73 are arranged on the side opposite to the guide shaft 4 (41). At this time, the torsion spring 7 is moved in a compressed state.

  Thereafter, as shown in FIG. 10, the support leg 72 and the pressing leg 73 are rotated to the guide shaft 4 (41) side around the winding part 71. With the support leg 72 and the pressing leg 73 rotated, the support leg 72 and the pressing leg 73 are passed through the gap between the guide shaft 4 (41) and the engaging convex part 631 of the engaging part 63. After that, the support leg 72 and the press leg 73 are opened, the support leg 72 is engaged with the engagement part 63, and the press leg 73 is brought into contact with the guide shaft 4 (41) to complete the attachment.

  By mounting in this way, it is necessary to always compress the torsion spring 7, but the mounting procedure becomes very simple, and it is possible to suppress the occurrence of variations in the mounting process.

  The above-described method is an example of a procedure for attaching a torsion spring, and may be attached by a procedure other than this method.

  Moreover, although the front-end | tip part of the screw holding part holding the winding part of a torsion spring protrudes on the opposite side to a traverse chassis, when attaching a torsion spring, a winding part can be easily engaged. The protruding direction is not particularly limited as long as it is a direction that can prevent the winding part from falling off.

  As described above, in the optical disk device of the present invention, the guide shaft 4 (41, 42) can be attached to the shaft support 6 and disposed on the traverse chassis 1, and then the torsion spring 7 can be attached. Accordingly, the torsion spring can be easily attached, and the process at the time of assembly can be divided, so that an assembly error can be reduced. Moreover, since the assembly is easy, it is possible to suppress variation in the mounting of the torsion spring.

  In the above embodiment, the torsion spring 7 has a shape in which the support leg 72 and the pressing leg 73 have the same length and are bent at the same length from the tip, and the winding part 71 is the center. Are symmetrical. In the case of this torsion spring 7, even if it is reversed around the winding portion 71, the same shape is obtained, so that it is always in the same state without checking the support leg portion 72 and the pressing leg portion 73 at the time of attachment. It is possible to attach to the shaft support 6.

  Although the winding number of the winding part 71 is arbitrary, the supporting leg part 72 and the pressing leg part 73 may be formed so as to generate an appropriate elastic force that presses the guide shaft 4 (41). When the support leg 72 is engaged with the engaging part 63 and is in contact with the engaging convex part 631, the position where the pressing leg 73 is in contact with the guide shaft 4 (41) is overlapped with the adjusting screw 64 in the axial direction. Examples of setting the number of windings can be given. According to this, the axial position of the pressing portion of the pressing leg portion 73 of the guide shaft 4 (41) and the support portion by the adjusting screw 64 can be easily matched.

  The present invention can be used for an optical disc apparatus that guides sliding of an optical pickup using two guide shafts.

A Optical disk apparatus 1 Traverse chassis 10 Opening 11 Damper member 2 Turntable 21 Placement part 22 Protrusion part 3 Optical pickup 31 Pickup base 311 Bearing part 312 Engaging part 313 Rack piece 32 Objective lens 33 Objective lens holder 34 Substrate 35 FFC
4 Guide shaft 41 Main shaft 42 Sub shaft 51 Lead screw 52 Drive motor 6 Shaft support portion 60 Shaft support portion 61 Movement restricting portion 62 Spring holding portion 621 Protruding portion 63 Engaging portion 64 Adjustment screw 7 Torsion spring 71 Winding portion 72 Support Arm 73 Pressing arm

Claims (8)

A pair of guide shafts that slidably support the optical pickup;
A shaft support provided in a traverse chassis and supporting both ends of the guide shaft;
An optical disk device having a torsion spring attached to the shaft support portion and pressing the guide shaft toward the traverse chassis,
The torsion spring is
A winding part wound in a spiral,
A pressing leg protruding in the normal direction from the one end of the winding part;
A support leg protruding in the normal direction from the other end of the winding part;
The shaft support is
A shaft support portion orthogonal to the guide shaft and supporting the guide shaft;
A spring holding portion formed parallel to the axial direction of the guide shaft;
An engaging portion formed on the opposite side of the traverse chassis across the guide shaft;
An adjustment screw for adjusting the distance between the guide shaft and the traverse chassis;
The torsion spring is in a compressed state, the winding portion is fitted into the spring holding portion, and the pressing leg is in contact with the adjustment screw between the tip of the guide shaft and the shaft support portion from the opposite side. The optical disc apparatus is characterized in that the support leg portion is engaged with the engagement portion.   The distance from the tip of the guide shaft of the pressing portion pressed from the pressing leg portion of the guide shaft is the same as the distance from the tip of the guide shaft of the support portion supported by the adjustment screw of the guide shaft. The optical disc apparatus according to claim 1.   The optical disc apparatus according to claim 1, wherein the spring holding portion and the engaging portion are formed in opposite directions.   The optical disk apparatus according to claim 1, wherein the engaging portion is formed integrally with the shaft support portion.   5. The optical disc device according to claim 1, wherein a tip of the spring holding portion includes a convex portion protruding in a direction orthogonal to the traverse chassis.   6. The optical disc apparatus according to claim 1, wherein a tip of the engaging portion includes an engaging convex portion protruding to a side on which the engaging leg portion is engaged.   The optical disc apparatus according to claim 1, wherein the shaft support portion is formed integrally with the traverse chassis.   The optical disc apparatus according to claim 1, wherein the spring holding portion is formed outside a region sandwiched between the pair of guide shafts.

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