JP2009176361A - Disk driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately ensure the operation of an optical pickup by securing a good positional relation between a lead screw and a nut screwed with the lead screw. <P>SOLUTION: A base chassis 5 is provided with an attaching surface part having an attached surface part 33 of a bracket 27 fixed thereto, The attaching surface part 7 of the base chassis is provided with screw attaching holes 10 and 10 and a plurality of positioning holes 8, 8, 9, and 9 formed separately in the radial direction of a disk recording medium 100. The attached surface part is provided with screw holes 36 and 36 formed to be stacked on the screw attaching holes when it is attached to the attaching surface, and a plurality of aligning holes 34, 34, 35 and 35 formed separately in the radial direction of the disk recording medium to perform positioning with the base chassis when attached to the attaching surface. One of the screw attaching hole and the screw hole is formed long in a direction orthogonal to the radial direction of the disk recording medium, and one of the plurality of positioning holes and the plurality of aligning holes is formed to be shifted in a direction orthogonal to the radial direction of the disk recording medium. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disk drive device. Specifically, a positioning hole is formed in the mounting surface portion of the base chassis, a positioning hole is formed in the mounting surface portion of the pickup moving mechanism, positioning is performed, and a lead screw of the pickup moving mechanism and a nut screwed to the lead screw are arranged. It is related with the technical field which ensures the favorable positional relationship between.

  2. Description of the Related Art There is a disk drive device that records and reproduces information signals on and from a disk-shaped recording medium such as an optical disk or a magneto-optical disk mounted on a disk table. And an optical pickup for irradiating the disc-shaped recording medium with laser light. The optical pickup includes a moving base that is moved in the radial direction of the disc-shaped recording medium, and an objective lens driving device that is disposed on the moving base.

  The disk drive device is provided with a mechanical chassis and a disk drive unit supported by the mechanical chassis so as to be movable in a direction in which the disk-shaped recording medium is separated from the disk drive unit. The disk drive unit includes a base chassis, a rotation drive mechanism having a spindle motor attached to the base chassis and rotating a disk table, the above-described optical pickup, and a pickup moving mechanism for moving the optical pickup in the radial direction of the disk-shaped recording medium. A guide shaft provided in the base chassis for guiding the optical pickup in the radial direction of the disk-shaped recording medium;

  Such a pickup moving mechanism includes a lead screw whose axial direction is the radial direction of the disk-shaped recording medium, a bracket that rotatably supports the lead screw, a drive motor that rotates the lead screw, and an optical pickup that is attached to the lead. Some have nuts that are screwed onto the screws.

  In the pickup moving mechanism, when the lead screw is rotated by the driving force of the drive motor, a nut is sent in a direction corresponding to the rotation direction, and the optical pickup is guided and moved by the guide shaft in the radial direction of the disk-shaped recording medium. Is done.

  In the pickup moving mechanism, the nut is urged by the spring member to the side pressed against the lead screw in the direction orthogonal to the axial direction of the lead screw in order to prevent the nut from being screwed to the lead screw. (For example, refer to Patent Document 1).

JP 2003-66016 A

  However, as described above, since the disk drive device is configured by assembling predetermined parts to the base chassis, depending on the processing accuracy of each part and the positional accuracy of the optical pickup and the pickup moving mechanism with respect to the base chassis. The position accuracy of the nut relative to the lead screw may vary depending on the product.

  Therefore, as described above, when the position accuracy of the nut with respect to the lead screw is low in a state where the nut is biased to the side pressed against the lead screw by the spring member in order to prevent the nut from being screwed to the lead screw. For example, if the pressing force of the nut against the lead screw becomes too weak, the nut will fall off the lead screw when the lead screw rotates or when an impact is applied due to dropping, etc., and the nut will not be sent normally by the lead screw. There is a risk that the movement of the optical pickup will not be performed properly.

  On the other hand, when the position accuracy of the nut relative to the lead screw is low, if the pressing force of the nut against the lead screw becomes too strong, the lead screw will not rotate due to the large pressing force from the nut, and the optical pickup will move. Operation may not be performed.

  In this case, it is possible to eliminate the problem that the lead screw cannot be rotated by using a large drive motor with a large driving force. However, if a large drive motor is used, the disk drive device becomes thin. As a result, there will be a problem that the manufacturing cost will be increased.

  Therefore, the disk drive device of the present invention overcomes the above-described problems and ensures a good positional relationship between the lead screw and the nut screwed to the lead screw to optimize the operation of the optical pickup. This is the issue.

  In order to solve the above-described problems, the disk drive device has a disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, and a radial direction of the disk-shaped recording medium that is mounted on the disk table. An optical pickup to be moved, a guide shaft for guiding the optical pickup in a radial direction of the disc-shaped recording medium, a base chassis for holding the guide shaft, and a radius of the disc-shaped recording medium assembled to the base chassis. A pick-up moving mechanism that moves in a direction, the pick-up moving mechanism including a lead screw whose axial direction is a radial direction of the disk-shaped recording medium, and a bracket that rotatably supports the lead screw and has a mounting surface portion And rotate the lead screw And a nut that is screwed to the lead screw in a state of being urged to the side pressed against the lead screw in a direction orthogonal to the axial direction of the lead screw. A mounting surface portion to which the mounting surface portion of the bracket is attached to the base chassis, and a plurality of positioning holes formed in the mounting surface portion of the base chassis so as to be spaced apart from each other in a radial direction of the disk-shaped recording medium. A mounting hole portion of the bracket, a screw hole that overlaps the screw mounting hole of the base chassis when the bracket mounting surface portion is attached to the mounting surface portion of the base chassis, and a radial direction of the disk-shaped recording medium The base chassis is positioned between the base chassis and the base chassis when the base chassis is attached to the mounting surface. A plurality of alignment holes for performing recording, and one of the screw mounting hole of the base chassis or the screw hole of the bracket is formed into a long hole shape that is long in a direction perpendicular to the radial direction of the disk-shaped recording medium. And one of a plurality of positioning holes of the base chassis or a plurality of alignment holes of the bracket is formed by shifting in a direction perpendicular to the radial direction of the disk-shaped recording medium.

  In order to solve the above-described problem, another disk drive device includes a disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, and a radius of the disk-shaped recording medium that is mounted on the disk table. An optical pickup moved in the direction, a guide shaft for guiding the optical pickup in the radial direction of the disk-shaped recording medium, a base chassis for holding the guide shaft, and the optical pickup assembled to the base chassis. A pick-up moving mechanism for moving the pick-up moving mechanism in a radial direction of the disc-shaped recording medium, and a pick-up moving mechanism that rotatably supports the lead screw and a mounting surface portion. A bracket having the lead screw A drive motor to be rotated, and the optical pickup is provided with a nut that is screwed to the lead screw in a state of being urged to a side pressed against the lead screw in a direction perpendicular to the axial direction of the lead screw. A mounting surface portion to which the mounting surface portion of the bracket is attached to the base chassis, and a positioning hole formed in the mounting surface portion of the base chassis in the shape of a long hole in the radial direction of the disk-shaped recording medium. A mounting hole portion of the bracket, a screw hole that overlaps the screw mounting hole of the base chassis when the bracket mounting surface portion is attached to the mounting surface portion of the base chassis, and a radial direction of the disk-shaped recording medium Positioned between the base chassis and the base chassis when spaced apart and attached to the mounting surface A plurality of alignment holes to be formed, and one of the screw mounting hole of the base chassis or the screw hole of the bracket is formed in a long hole shape that is long in a direction perpendicular to the radial direction of the disk-shaped recording medium. The plurality of alignment holes of the bracket are formed by shifting in a direction perpendicular to the radial direction of the disc-shaped recording medium.

  In order to solve the above-described problems, another disk drive device includes a disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, and the disk-shaped recording medium that is mounted on the disk table. An optical pickup that is moved in the radial direction, a guide shaft that guides the optical pickup in the radial direction of the disc-shaped recording medium, a base chassis that holds the guide shaft, and the optical pickup that is assembled to the base chassis. A pickup moving mechanism for moving the medium in a radial direction, wherein the pickup moving mechanism includes a lead screw whose axial direction is the radial direction of the disk-shaped recording medium, and a surface to be mounted that rotatably supports the lead screw. A bracket having the lead screw and the lead screw A drive motor that rotates the nut, and the optical pickup includes a nut that is screwed to the lead screw in a state of being biased to a side that is pressed against the lead screw in a direction perpendicular to the axial direction of the lead screw. A mounting surface portion to which the mounting surface portion of the bracket is attached is provided on the base chassis, and a plurality of screw mounting holes and a plurality of disc-shaped recording media are formed on the mounting surface portion of the base chassis so as to be spaced apart in the radial direction. A positioning hole, a screw hole that overlaps the mounting surface portion of the base chassis when the mounting surface portion of the bracket is attached to the mounting surface portion of the base chassis, and a radius of the disk-shaped recording medium And spaced apart in the direction between the base chassis and the base chassis when attached to the mounting surface. A plurality of alignment holes for positioning, and one of the screw mounting hole of the base chassis or the screw hole of the bracket is elongated in a direction perpendicular to the radial direction of the disk-shaped recording medium. The plurality of positioning holes of the base chassis are formed by shifting in a direction perpendicular to the radial direction of the disk-shaped recording medium.

  Therefore, in the disk drive device, the mounting surface portion of the base chassis and the mounting surface portion of the bracket are positioned by the positioning hole and the alignment hole, and the pickup is moved to the base chassis by the mounting screw through the screw mounting hole and the screw hole. A mechanism bracket is attached.

  In the disk drive device, the screw mounting hole of the base chassis is formed as a screw hole to which a mounting screw is fastened, and the screw hole of the bracket is elongated in a direction perpendicular to the radial direction of the disk-shaped recording medium. It is desirable to form as an insertion hole through which the mounting screw is inserted.

  Assembling the pickup moving mechanism to the base chassis by forming the screw mounting hole of the base chassis as a screw hole and forming the screw hole of the bracket as an insertion hole that is long in the direction perpendicular to the radial direction of the disk-shaped recording medium The work can be performed from the same side as the work of assembling the rotary drive mechanism having the disk table and the spindle motor and the base chassis of the optical pickup.

  Further, in the above disk drive device, the positioning hole of the base chassis and the positioning hole of the bracket are inserted into the positioning pins provided on the cradle, thereby positioning the mounting surface portion of the base chassis and the mounting surface portion of the bracket. It is possible to do.

  Positioning adjustment work is facilitated by positioning using a cradle provided with positioning pins.

  The disk drive device of the present invention includes a disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, an optical pickup that is moved in the radial direction of the disk-shaped recording medium mounted on the disk table, and A guide shaft that guides the optical pickup in the radial direction of the disk-shaped recording medium, a base chassis that holds the guide shaft, and a pickup moving mechanism that is assembled to the base chassis and moves the optical pickup in the radial direction of the disk-shaped recording medium The pick-up moving mechanism includes a lead screw whose axial direction is the radial direction of the disc-shaped recording medium, and a bracket having a mounting surface portion that rotatably supports the lead screw. And the lead screw A drive motor that rotates, and the optical pickup is attached with a nut that is screwed to the lead screw in a state of being urged to a side that is pressed against the lead screw in a direction perpendicular to the axial direction of the lead screw. The base chassis is provided with a mounting surface portion to which the mounting surface portion of the bracket is mounted, and a plurality of positioning holes formed on the mounting surface portion of the base chassis so as to be spaced apart from each other in the radial direction of the screw mounting holes A screw hole that is overlapped with the screw mounting hole of the base chassis when the bracket is mounted on the mounting surface portion of the base chassis, and a radial direction of the disc-shaped recording medium. And formed between the base chassis and the base chassis when attached to the mounting surface. A plurality of alignment holes for positioning, and one of the base chassis screw mounting hole and the bracket screw hole is elongated in a direction perpendicular to the radial direction of the disk-shaped recording medium. The base chassis is formed such that one of the plurality of positioning holes of the base chassis or the plurality of alignment holes of the bracket is shifted in a direction perpendicular to the radial direction of the disk-shaped recording medium.

  Therefore, even when the position accuracy of the nut with respect to the lead screw varies depending on the product, a good positional relationship between the lead screw and the nut is ensured to facilitate the rotation of the lead screw and the feeding operation of the nut. Thus, the operation of the optical pickup can be optimized.

  In the invention described in claim 2, the screw mounting hole of the base chassis is formed as a screw hole to which the mounting screw is fastened, and the screw hole of the bracket is orthogonal to the radial direction of the disc-shaped recording medium. Since the mounting holes are formed as insertion holes through which the mounting screws are inserted, the assembly of the rotation drive mechanism having the disk table and the spindle motor, the optical pickup and the pickup moving mechanism to the base chassis is all performed on one side of the base chassis. It can be performed from the surface side, and the workability in the assembling work for the base chassis can be improved.

  According to a third aspect of the present invention, the base chassis positioning surface and the bracket mounting surface are mounted by inserting the positioning holes of the base chassis and the positioning holes of the brackets into the positioning pins provided on the cradle. Since positioning with the surface portion is performed, it is possible to improve workability in positioning adjustment work.

  Another disk drive apparatus according to the present invention includes a disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, and an optical pickup that is moved in the radial direction of the disk-shaped recording medium mounted on the disk table. And a guide shaft for guiding the optical pickup in the radial direction of the disk-shaped recording medium, a base chassis for holding the guide shaft, and a pickup assembled to the base chassis to move the optical pickup in the radial direction of the disk-shaped recording medium The pickup drive mechanism includes a lead screw whose axial direction is the radial direction of the disc-shaped recording medium, and rotatably supports the lead screw to attach the mounting surface portion. A bracket having the lead screen A nut that is screwed onto the lead screw in a state of being urged to a side pressed against the lead screw in a direction perpendicular to the axial direction of the lead screw. The base chassis is provided with a mounting surface portion to which the mounting surface portion of the bracket is attached, and the mounting surface portion of the base chassis is formed into a long hole shape in the radial direction of the disk-shaped recording medium. A positioning hole, a screw hole that overlaps the mounting surface portion of the base chassis when the mounting surface portion of the bracket is attached to the mounting surface portion of the base chassis, and a radius of the disk-shaped recording medium And spaced from the base chassis when mounted on the mounting surface. A plurality of alignment holes for making a decision, and one of the screw mounting hole of the base chassis or the screw hole of the bracket is elongated in a direction perpendicular to the radial direction of the disk-shaped recording medium. The plurality of alignment holes of the bracket are formed so as to be shifted in a direction perpendicular to the radial direction of the disc-shaped recording medium.

  Therefore, even when the position accuracy of the nut with respect to the lead screw varies depending on the product, a good positional relationship between the lead screw and the nut is ensured to facilitate the rotation of the lead screw and the feeding operation of the nut. Thus, the operation of the optical pickup can be optimized.

  In the invention according to claim 5, the screw mounting hole of the base chassis is formed as a screw hole to which a mounting screw is fastened, and the screw hole of the bracket is orthogonal to the radial direction of the disk-shaped recording medium. Since the mounting holes are formed as insertion holes through which the mounting screws are inserted, the assembly of the rotation drive mechanism having the disk table and the spindle motor, the optical pickup and the pickup moving mechanism to the base chassis is all performed on one side of the base chassis. It can be performed from the surface side, and the workability in the assembling work for the base chassis can be improved.

  According to the sixth aspect of the present invention, the positioning hole of the base chassis and the positioning hole of the bracket are inserted into the positioning pins provided on the cradle to attach the mounting surface portion of the base chassis and the bracket to be mounted. Since positioning with the surface portion is performed, it is possible to improve workability in positioning adjustment work.

  Another disk drive device of the present invention is a disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, and a light that is moved in the radial direction of the disk-shaped recording medium mounted on the disk table. A pickup, a guide shaft that guides the optical pickup in the radial direction of the disk-shaped recording medium, a base chassis that holds the guide shaft, and the optical pickup that is assembled to the base chassis are moved in the radial direction of the disk-shaped recording medium. A disk drive device including a pickup moving mechanism, wherein the pickup moving mechanism includes a lead screw whose axial direction is a radial direction of the disk-shaped recording medium, and a surface of the mounting surface that rotatably supports the lead screw. A bracket having the lead A nut that is screwed onto the lead screw in a state of being biased toward the side pressed against the lead screw in a direction orthogonal to the axial direction of the lead screw. And a mounting surface portion to which the mounting surface portion of the bracket is mounted is provided on the base chassis, and a plurality of screw mounting holes and a plurality of disk mounting holes are formed in the mounting surface portion of the base chassis so as to be separated from each other in the radial direction. A positioning hole, a screw hole that is overlapped with a screw mounting hole of the base chassis when the bracket is mounted on the mounting surface part of the base chassis, and a disk-shaped recording medium. The base chassis is formed when spaced apart in the radial direction and attached to the attachment surface portion. A plurality of alignment holes for positioning between them, and one of the screw mounting hole of the base chassis or the screw hole of the bracket is long in a direction perpendicular to the radial direction of the disk-shaped recording medium It is formed in a long hole shape, and the plurality of positioning holes of the base chassis are formed by shifting in a direction perpendicular to the radial direction of the disk-shaped recording medium.

  Therefore, even when the position accuracy of the nut with respect to the lead screw varies depending on the product, a good positional relationship between the lead screw and the nut is ensured to facilitate the rotation of the lead screw and the feeding operation of the nut. Thus, the operation of the optical pickup can be optimized.

  In the invention described in claim 8, the screw mounting hole of the base chassis is formed as a screw hole to which a mounting screw is fastened, and the screw hole of the bracket is orthogonal to the radial direction of the disc-shaped recording medium. Since the mounting holes are formed as insertion holes through which the mounting screws are inserted, the assembly of the rotation drive mechanism having the disk table and the spindle motor, the optical pickup and the pickup moving mechanism to the base chassis is all performed on one side of the base chassis. It can be performed from the surface side, and the workability in the assembling work for the base chassis can be improved.

  According to the ninth aspect of the present invention, the positioning hole of the base chassis and the positioning hole of the bracket are inserted into the positioning pins provided on the cradle to attach the mounting surface portion of the base chassis and the bracket to be mounted. Since positioning with the surface portion is performed, it is possible to improve workability in positioning adjustment work.

  The best mode of the disk drive apparatus of the present invention will be described below with reference to the accompanying drawings.

  The disk drive device 1 is formed by arranging required members and mechanisms in an outer casing 2, and a disk insertion slot 2 a is formed on the side surface of the outer casing 2 (see FIG. 1).

  A mechanical chassis 3 is arranged in the outer casing 2, and a disk drive unit 4 can be moved up and down in the mechanical chassis 3 in a direction to be separated from the disk-shaped recording medium 100 inserted into the outer casing 2 from the disk insertion port 2 a. It is supported (rotatable).

  The disk drive unit 4 is configured by assembling required parts to the base chassis 5 (see FIGS. 2 to 4).

  The base chassis 5 is formed with an arrangement hole 5a that is long in the radial direction of the disk-shaped recording medium 100 (X direction shown in each drawing). On the outer peripheral surface 5 b of the base chassis 5, fulcrum shafts 6, 6 protruding outward are provided. The disk drive unit 4 is rotatably supported by the mechanical chassis 3 with fulcrum shafts 6 and 6 as fulcrums.

  One portion of the base chassis 5 on the side (Y direction) of the arrangement hole 5 a is provided as the attachment surface portion 7. A pickup moving mechanism, which will be described later, is attached to the attachment surface portion 7.

  A pair of first positioning holes 8 and 8 are formed in the outer end portion of the mounting surface portion 7 so as to be separated from each other in the X direction (see FIG. 2). A pair of second positioning holes 9 and 9 are formed in the outer end portion of the mounting surface portion 7 so as to be spaced apart from each other in the X direction. The second positioning holes 9 and 9 are respectively formed in the first positioning holes 8 and 8. It is located in the vicinity. The first positioning holes 8 and 8 and the second positioning holes 9 and 9 are, for example, a direction orthogonal to the radial direction of the disc-shaped recording medium 100, that is, a direction orthogonal to the X direction (Y direction shown in each drawing). (See FIG. 5). The shift amount H between the first positioning holes 8 and 8 and the second positioning holes 9 and 9 is, for example, about 0.1 mm.

  A pair of screw mounting holes 10 and 10 are formed at the outer end of the mounting surface portion 7 so as to be separated from each other in the X direction. The screw mounting holes 10 and 10 are formed, for example, as screw holes to which mounting screws to be described later are fastened, and have screw grooves on the peripheral surface.

  A rotation drive mechanism 11 is attached to the base chassis 5 (see FIGS. 1 to 4). The rotation drive mechanism 11 has a spindle motor 12, a motor mounting plate 13 to which the spindle motor 12 is mounted, and a disk table 14 to which the disk-shaped recording medium 100 is mounted and which is fixed to the motor shaft of the spindle motor 12. A plate 13 is attached to the lower surface 5 c of the base chassis 5. In a state where the rotation drive mechanism 11 is attached to the base chassis 5, the disk table 14 is arranged at one end of the arrangement hole 5a (see FIG. 1).

  Shaft holders 15, 15, 16, and 16 are provided on the lower surface 5c of the base chassis 5 so as to be separated in four directions (see FIGS. 2 to 4). The shaft holders 15 and 15 and the shaft holders 16 and 16 respectively hold both end portions of the guide shafts 17 and 18, and the guide shafts 17 and 18 have an axial direction in the radial direction of the disc-shaped recording medium 100 (X direction). ) Is arranged on the lower surface 5c side of the base chassis 5 so as to match.

  An optical pickup 19 is movably supported on the guide shafts 17 and 18 (see FIGS. 1 to 4). The optical pickup 19 includes an objective lens driving device 21 disposed on a moving base 20. Bearing portions 20a and 20b are provided at both ends in the Y direction of the moving base 20, and the bearing portions 20a and 20b are slidably supported by the guide shafts 17 and 18, respectively. In the state where the moving base 20 is supported by the bearing portions 20a and 20b, the objective lens driving device 21 of the optical pickup 19 is disposed in the arrangement hole 5a of the base chassis 5 (see FIG. 1). Therefore, when the optical pickup 19 is guided by the guide shafts 17 and 18 and moved in the radial direction of the disc-shaped recording medium 100, the objective lens driving device 21 is moved in the longitudinal direction through the arrangement hole 5a.

  A nut 22 is attached to the side surface of the bearing portion 20a of the moving base 20 (see FIGS. 2 to 4). The nut 22 has a base portion 23 attached to the bearing portion 20a and a supported portion 24 supported by the base portion 23 via a hinge, and is screwed to the supported portion 24 with a lead screw described later. Screwing protrusions 24a and 24a are provided. The nut 22 is provided with an urging spring 25 as a compression coil spring between the base portion 23 and the supported portion 24, and a direction in which the supported portion 24 is separated from the base portion 23 by the urging spring 25, that is, a disc shape. In the direction perpendicular to the radial direction of the recording medium 100 (Y direction), the recording medium 100 is biased in a direction (A direction shown in FIG. 4) away from the bearing portion 20a.

  A pickup moving mechanism 26 is attached to the lower surface of the attachment surface portion 7 of the base chassis 5 (see FIGS. 2 to 4). The pickup moving mechanism 26 includes a bracket 27, a drive motor 28 attached to the bracket 27, and a lead screw 29 that is rotatably supported by the bracket 27.

  The bracket 27 includes a connecting surface portion 30 that is long in the X direction, support surface portions 31 that protrude upward from both ends in the longitudinal direction of the connecting surface portion 30, and side surfaces that protrude upward from a part of the side edge of the connecting surface portion 30. The portion 32 and the mounting surface portion 33 protruding in the Y direction (outward) from the upper edge of the side surface portion 32 are integrally formed.

  A pair of first alignment holes 34 and 34 are formed in the attached surface portion 33 of the bracket 27 so as to be separated from each other in the X direction (see FIGS. 2 and 5). A pair of second alignment holes 35, 35 are formed in the attached surface portion 33 so as to be separated from each other in the X direction. The second alignment holes 35, 35 are respectively formed on the first alignment holes 34, 34. Located in the vicinity. The first alignment holes 34 and 34 and the second alignment holes 35 and 35 are positioned so as to be aligned in the X direction.

  A pair of screw holes 36 and 36 are formed in the attached surface portion 33 so as to be separated from each other in the X direction. The screw holes 36, 36 are formed as insertion holes through which mounting screws, which will be described later, are inserted, for example, and are formed in a long hole shape that is long in the Y direction.

  The drive motor 28 is attached to the outer surface of one support surface portion 31 of the bracket 27.

  The lead screw 29 is connected to the drive motor 28 and rotated by the driving force of the drive motor 28 (see FIGS. 2 to 4). Both ends of the lead screw 29 in the axial direction are rotatably supported by support surface portions 31 and 31 of the bracket 27, respectively.

  The pickup moving mechanism 26 is fixed by attaching a mounting surface portion 33 of the bracket 27 to the mounting surface portion 7 of the base chassis 5 by mounting screws 37 and 37. When the pickup moving mechanism 26 is attached to the base chassis 5, the screw protrusions 24 a and 24 a of the nut 22 provided on the moving base 20 of the optical pickup 19 are screwed onto the lead screw 29 (FIG. 3). And FIG. 4). At this time, since the urging force in the direction A is applied to the screwing protrusions 24 a and 24 a by the urging spring 25 as described above, the screwing protrusions 24 a and 24 a are pressed against the lead screw 29. It is screwed in the state.

  As described above, since the screw projections 24a and 24a of the nut 22 attached to the optical pickup 19 are screwed to the lead screw 29, the lead screw 29 is driven by the driving force of the drive motor 28 in the pickup moving mechanism 26. When rotated, the nut 22 is sent in a direction corresponding to the rotation direction, and the optical pickup 19 is guided and moved by the guide shafts 17 and 18 in the radial direction of the disc-shaped recording medium 100.

  Below, the positioning adjustment operation | work at the time of attachment to the base chassis 5 of the pick-up moving mechanism 26 is demonstrated.

  The pickup moving mechanism 26 is attached to the base chassis 5 using, for example, a cradle 200 for performing an attaching operation (see FIG. 6). The cradle 200 has a mounting surface 201 for mounting the base chassis 5 of the disk drive unit 4. The mounting surface 201 is provided with positioning pins 202 and 202 protruding upward.

  First, the base chassis 5 is placed on the placement surface 201 of the cradle 200 with the lower surface 5c facing upward. A rotation drive mechanism 11 is attached to the base chassis 5 in advance from the lower surface 5c side, and an optical pickup 19 is supported from the lower surface 5c side. At this time, the positioning pins 202 and 202 are inserted into, for example, first positioning holes 8 and 8 formed in the attachment surface portion 7 of the base chassis 5, respectively. The positioning pins 202 and 202 protrude upward from the first positioning holes 8 and 8, respectively.

  Next, the pickup moving mechanism 26 is placed on the lower surface 5 c of the base chassis 5 with the lower surface of the mounting surface portion 33 of the bracket 27 facing upward. At this time, the positioning pins 202 and 202 protruding upward from the first positioning holes 8 and 8 are inserted into, for example, the first positioning holes 34 and 34 formed in the attached surface portion 33, respectively.

  As described above, the positioning pins 202 and 202 are inserted into the first positioning holes 8 and 8 and the first alignment holes 34 and 34, respectively, so that the mounting surface portion 33 is overlapped with the mounting surface portion 7 and the base chassis. 5, the pickup moving mechanism 26 is positioned.

  Subsequently, the mounting screws 37 and 37 are respectively inserted into the screw holes 36 and 36 of the mounted surface portion 33 and screwed into the screw mounting holes 10 and 10 of the mounting surface portion 7 to fix the pickup moving mechanism 26 to the base chassis 5. (See FIG. 7). The disk drive unit 4 is configured by fixing the pickup moving mechanism 26 to the base chassis 5. At this time, the screw projections 24 a and 24 a of the nut 22 are screwed to the lead screw 29 in a state where a biasing force in the A direction is applied by the biasing spring 25.

  Next, the disk drive unit 4 is taken out from the cradle 200 and the operation of the optical pickup 19 is confirmed. The operation is confirmed by energizing the drive motor 28 and inspecting the rotation state of the lead screw 29 and the operation state of the optical pickup 19. At this time, when it is confirmed that the rotation state of the lead screw 29 and the operation state of the optical pickup 19 are appropriate, the operation is completed.

  On the other hand, when it is confirmed that the rotation state of the lead screw 29 or the operation state of the optical pickup 19 is not appropriate, it is assumed that the position of the pickup moving mechanism 26 with respect to the base chassis 5 is incompatible. Do it. The case where the rotation state of the lead screw 29 or the operation state of the optical pickup 19 is not appropriate is, for example, a case where the pressing force of the nut 22 against the lead screw 29 is too strong and the rotation speed of the lead screw 29 is low, or the lead screw 29. Is not rotating.

  First, the mounting screws 37, 37 are loosened, the mounting screws 37, 37 are removed from the base chassis 5 and the pickup moving mechanism 26, and the pickup moving mechanism 26 is separated from the base chassis 5.

  Next, the base chassis 5 is mounted on the mounting surface 201 of the cradle 200 with the lower surface 5c facing upward. At this time, the positioning pins 202 and 202 are respectively inserted into the second positioning holes 9 and 9 formed in the mounting surface portion 7 of the base chassis 5. The positioning pins 202 and 202 protrude upward from the second positioning holes 9 and 9, respectively.

  Next, the pickup moving mechanism 26 is placed on the lower surface 5 c of the base chassis 5 with the lower surface of the mounting surface portion 33 of the bracket 27 facing upward. At this time, the positioning pins 202 and 202 protruding upward from the second positioning holes 9 and 9 are inserted into the second alignment holes 35 and 35 formed in the attached surface portion 33, respectively.

  As described above, the positioning pins 202 and 202 are inserted into the second positioning holes 9 and 9 and the second alignment holes 35 and 35, respectively, so that the mounting surface portion 33 is superimposed on the mounting surface portion 7 and the base chassis. 5, the pickup moving mechanism 26 is positioned again.

  Subsequently, the mounting screws 37 and 37 are respectively inserted into the screw holes 36 and 36 of the mounted surface portion 33 and screwed into the screw mounting holes 10 and 10 of the mounting surface portion 7 to fix the pickup moving mechanism 26 to the base chassis 5. To do. The disk drive unit 4 is configured by fixing the pickup moving mechanism 26 to the base chassis 5. At this time, the screw projections 24 a and 24 a of the nut 22 are screwed to the lead screw 29 in a state where a biasing force in the A direction is applied by the biasing spring 25.

  Next, the disk drive unit 4 is taken out from the cradle 200 and the operation of the optical pickup 19 is confirmed. The operation check is performed by energizing the drive motor 28 and inspecting the rotation state of the lead screw 29 and the operation state of the optical pickup 19 in the same manner as described above. After confirming that the rotation state of the lead screw 29 and the operation state of the optical pickup 19 are appropriate, the operation is completed.

  As described above, in the disk drive device 1, the first positioning holes 8, 8 and the second positioning holes 9, 9 are formed in the mounting surface portion 7 of the base chassis 5, and the mounting surface portion of the bracket 27 is mounted. Since the first alignment holes 34 and 34 and the second alignment holes 35 and 35 are formed in 33 to perform the positioning adjustment operation of the pickup moving mechanism 26 with respect to the base chassis 5, the lead screw of the nut 22 Even in the case where there is a variation in position accuracy with respect to the product 29, the rotational operation of the lead screw 29 and the nut are ensured by ensuring a good positional relationship between the lead screw 29 and the nut 22 screwed into the lead screw 29. Thus, the feeding operation of the optical pickup 19 can be made smooth, and the operation of the optical pickup 19 can be optimized.

  Further, the screw mounting holes 10 and 10 of the base chassis 5 are formed as screw holes to which the mounting screws 37 and 37 are fastened, and the screw holes 36 and 36 of the bracket 27 are inserted through the mounting screws 37 and 37. It is formed as.

  Accordingly, as described above, since the rotation drive mechanism 11 is attached to the base chassis 5 from the lower surface 5c side and the optical pickup 19 is supported from the lower surface 5c side, the screw mounting holes 10 and 10 of the base chassis 5 are provided. The mounting screws 37, 37 are formed as screw holes to be fastened, and the screw holes 36, 36 of the bracket 27 are formed as insertion holes through which the mounting screws 37, 37 are inserted. The work can also be performed from the lower surface 5c side of the base chassis 5, and the assembly of the rotation drive mechanism 11, the optical pickup 19 and the pickup moving mechanism 26 to the base chassis 5 can all be performed from the lower surface 5c side of the base chassis 5. The workability in the assembling work for the base chassis 5 can be improved.

  Further, since the positioning adjustment work for the base chassis 5 of the pickup moving mechanism 26 is performed by using the positioning pins 202 and 202 provided on the receiving base 200, the workability in the positioning adjustment work can be improved.

  In the above, the first positioning holes 8 and 8 and the second positioning holes 9 and 9 formed in the mounting surface portion 7 of the base chassis 5 are shifted in the Y direction, and the first positioning hole 34 of the pickup moving mechanism 26 is moved. , 34 and second alignment holes 35, 35 are formed so as to be aligned in the X direction, and the first positioning holes 8, 8, the second positioning holes 9, 9, and the first alignment hole 34 are formed. , 34 and the second alignment holes 35, 35 are used as positioning means to position the pickup moving mechanism 26 with respect to the base chassis 5. For example, as shown in FIG. The first positioning holes 8 and 8 and the second positioning holes 9 and 9 are formed in the mounting surface portion 7 of the base chassis 5 so as to be aligned in a straight line, and the first positioning holes 34 and 34 and the second position are formed. Alignment holes 35, 35 The mounted surface portion 33 of the bracket 27 may be formed by shifting in the Y direction.

  As another mode of the positioning means, as shown in FIG. 9, the first positioning holes 8 and 8 and the second positioning holes 9 and 9 are formed in the mounting surface portion 7 of the base chassis 5 by shifting in the Y direction. The alignment holes 38, 38 that are long in the X direction may be formed in the mounting surface portion 33 of the bracket 27. The alignment holes 38, 38 have lengths in the X direction that are longer than the distance between the first positioning holes 8, 8 and the second positioning holes 9, 9. 34 and the functions of the second alignment holes 35 and 35 are also used.

  Furthermore, as another aspect of the positioning means, as shown in FIG. 10, positioning holes 39, 39 that are long in the X direction are formed in the mounting surface portion 7 of the base chassis 5, and the first positioning holes 34, 34 and The two alignment holes 35, 35 may be formed in the mounting surface portion 33 of the bracket 27 by shifting in the Y direction. The positioning holes 39, 39 have lengths in the X direction that are longer than the distance between the first alignment holes 34, 34 and the second alignment holes 35, 35, respectively. 8 and the functions of the second positioning holes 9 and 9 are combined.

  In the above, screw mounting holes 10 and 10 that function as screw holes are formed in the mounting surface portion 7 of the base chassis 5, and screw holes 36 and 36 that function as screw insertion holes in the mounted surface portion 33 of the bracket 27. However, conversely, screw mounting holes 10 and 10 that function as screw insertion holes are formed in the mounting surface portion 7 of the base chassis 5, and function as screw holes in the mounted surface portion 33 of the bracket 27. Screw holes 36 and 36 may be formed. In this case, the screw attachment holes 10 and 10 that function as screw insertion holes are formed long in the Y direction, and the attachment screws 37 and 37 are screw attachment holes 10 that function as screw insertion holes from the upper surface side of the base chassis 5. The optical pickup drive mechanism 26 is fixed to the base chassis 5 by screwing into the screw holes 36 and 36 functioning as screw holes.

  Further, in the above, an example in which two positioning holes 8 and 9 and alignment holes 34 and 35 that are shifted in the Y direction are formed is shown, but the positioning holes 8 and 9 and the alignment holes 34 and 35 The number is not limited to two, and three or more can be formed in correspondence with the increase in positions where positioning adjustment is possible.

  The specific shapes and structures of the respective parts shown in the best mode for carrying out the invention described above are merely examples of the implementation of the present invention, and the present invention is thereby limited. This technical scope should not be interpreted in a limited way.

FIG. 2 to FIG. 10 show the best mode for carrying out the disk drive device of the present invention, and this figure is a schematic perspective view showing the disk drive device together with a disk-shaped recording medium. FIG. 4 is an enlarged perspective view showing the disk drive unit in a state where a pickup moving mechanism is separated. It is an expansion perspective view of a disk drive unit. It is an enlarged bottom view of a disk drive unit. It is an expansion disassembled perspective view which shows the attaching part of a base chassis, and the to-be-attached part of a pickup moving mechanism. It is an expansion disassembled perspective view which shows the positional relationship of the positioning pin of a cradle, a positioning hole, and an alignment hole. It is an expanded sectional view showing the state where the pickup moving mechanism was fixed to the base chassis. FIG. 4 is an enlarged exploded perspective view showing a base chassis mounting portion in which screw mounting holes are formed in a straight line and a mounted portion of a pickup moving mechanism in which screw holes are formed in a shifted state. It is an expansion disassembled perspective view which shows another aspect of the attaching part of a base chassis, and the to-be-attached part of a pickup moving mechanism. It is an expansion disassembled perspective view which shows another aspect of the attaching part of a base chassis, and the to-be-attached part of a pickup moving mechanism.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Disc-shaped recording medium, 1 ... Disk drive apparatus, 5 ... Base chassis, 7 ... Mounting surface part, 8 ... 1st positioning hole, 9 ... 2nd positioning hole, 14 ... Disc table, 17 ... Guide shaft, 18 DESCRIPTION OF SYMBOLS ... Guide shaft, 19 ... Optical pick-up, 22 ... Nut, 26 ... Pick-up moving mechanism, 27 ... Bracket, 28 ... Drive motor, 29 ... Lead screw, 33 ... Mounted surface part, 34 ... First alignment hole, 35 ... 2nd alignment hole, 36 ... screw hole, 37 ... mounting screw, 38 ... alignment hole, 39 ... positioning hole, 200 ... cradle, 202 ... positioning pin

Claims (9)

A disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, an optical pickup that is moved in the radial direction of the disk-shaped recording medium that is mounted on the disk table, and the optical pickup is recorded on the disk A disk drive apparatus comprising: a guide shaft for guiding the medium in the radial direction; a base chassis for holding the guide shaft; and a pickup moving mechanism assembled to the base chassis for moving the optical pickup in the radial direction of the disk-shaped recording medium Because
The pickup moving mechanism is
A lead screw whose axial direction is the radial direction of the disc-shaped recording medium;
A bracket that rotatably supports the lead screw and has a mounted surface portion;
A drive motor for rotating the lead screw,
The optical pickup is attached with a nut that is screwed to the lead screw in a state of being urged to a side pressed against the lead screw in a direction orthogonal to the axial direction of the lead screw.
A mounting surface portion to which the mounting surface portion of the bracket is attached to the base chassis is provided,
Forming a screw mounting hole and a plurality of positioning holes formed in the radial direction of the disk-shaped recording medium in the mounting surface portion of the base chassis;
The mounting surface portion of the bracket is formed so as to be spaced apart in the radial direction of the disk-shaped recording medium, and a screw hole that is overlapped with the screw mounting hole of the base chassis when attached to the mounting surface portion of the base chassis. Forming a plurality of alignment holes for positioning with the base chassis when attached to the attachment surface portion;
One of the screw mounting hole of the base chassis or the screw hole of the bracket is formed in a long hole shape that is long in a direction perpendicular to the radial direction of the disk-shaped recording medium,
One of the plurality of positioning holes of the base chassis or the plurality of alignment holes of the bracket is formed by shifting in a direction perpendicular to the radial direction of the disk-shaped recording medium. Forming a screw mounting hole of the base chassis as a screw hole to which a mounting screw is fastened;
2. The disk drive device according to claim 1, wherein the screw hole of the bracket is formed as an insertion hole through which a mounting screw is inserted by extending in a direction perpendicular to the radial direction of the disk-shaped recording medium. The positioning hole of the base chassis and the positioning hole of the bracket are inserted into the positioning pins provided on the cradle, thereby positioning the mounting surface portion of the base chassis and the mounting surface portion of the bracket. The disk drive device according to claim 1. A disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, an optical pickup that is moved in the radial direction of the disk-shaped recording medium that is mounted on the disk table, and the optical pickup is recorded on the disk A disk drive apparatus comprising: a guide shaft for guiding the medium in the radial direction; a base chassis for holding the guide shaft; and a pickup moving mechanism assembled to the base chassis for moving the optical pickup in the radial direction of the disk-shaped recording medium Because
The pickup moving mechanism is
A lead screw whose axial direction is the radial direction of the disc-shaped recording medium;
A bracket that rotatably supports the lead screw and has a mounted surface portion;
A drive motor for rotating the lead screw,
The optical pickup is attached with a nut that is screwed to the lead screw in a state of being urged to a side pressed against the lead screw in a direction orthogonal to the axial direction of the lead screw.
A mounting surface portion to which the mounting surface portion of the bracket is attached to the base chassis is provided,
A screw mounting hole and a positioning hole that is elongated in the radial direction of the disk-shaped recording medium are formed in the mounting surface portion of the base chassis,
The mounting surface portion of the bracket is formed so as to be spaced apart in the radial direction of the disk-shaped recording medium, and a screw hole that is overlapped with the screw mounting hole of the base chassis when attached to the mounting surface portion of the base chassis. Forming a plurality of alignment holes for positioning with the base chassis when attached to the attachment surface portion;
One of the screw mounting hole of the base chassis or the screw hole of the bracket is formed in a long hole shape that is long in a direction perpendicular to the radial direction of the disk-shaped recording medium,
A disk drive device, wherein the plurality of alignment holes of the bracket are formed by shifting in a direction perpendicular to a radial direction of the disk-shaped recording medium. Forming a screw mounting hole of the base chassis as a screw hole to which a mounting screw is fastened;
The disk drive device according to claim 4, wherein the screw hole of the bracket is formed as an insertion hole through which a mounting screw is inserted by extending in a direction orthogonal to the radial direction of the disk-shaped recording medium. The positioning hole of the base chassis and the positioning hole of the bracket are inserted into the positioning pins provided on the cradle, thereby positioning the mounting surface portion of the base chassis and the mounting surface portion of the bracket. The disk drive device according to claim 4. A disk table on which a disk-shaped recording medium is mounted, a spindle motor that rotates the disk table, an optical pickup that is moved in the radial direction of the disk-shaped recording medium that is mounted on the disk table, and the optical pickup is recorded on the disk A disk drive apparatus comprising: a guide shaft for guiding the medium in the radial direction; a base chassis for holding the guide shaft; and a pickup moving mechanism assembled to the base chassis for moving the optical pickup in the radial direction of the disk-shaped recording medium Because
The pickup moving mechanism is
A lead screw whose axial direction is the radial direction of the disc-shaped recording medium;
A bracket that rotatably supports the lead screw and has a mounted surface portion;
A drive motor for rotating the lead screw,
The optical pickup is attached with a nut that is screwed to the lead screw in a state of being urged to a side pressed against the lead screw in a direction orthogonal to the axial direction of the lead screw.
A mounting surface portion to which the mounting surface portion of the bracket is attached to the base chassis is provided,
Forming a screw mounting hole and a plurality of positioning holes formed in the radial direction of the disk-shaped recording medium in the mounting surface portion of the base chassis;
The mounting surface portion of the bracket is formed so as to be spaced apart in the radial direction of the disk-shaped recording medium, and a screw hole that is overlapped with the screw mounting hole of the base chassis when attached to the mounting surface portion of the base chassis. Forming a plurality of alignment holes for positioning with the base chassis when attached to the attachment surface portion;
One of the screw mounting hole of the base chassis or the screw hole of the bracket is formed in a long hole shape that is long in a direction perpendicular to the radial direction of the disk-shaped recording medium,
A disk drive device, wherein the plurality of positioning holes of the base chassis are formed by shifting in a direction perpendicular to the radial direction of the disk-shaped recording medium. Forming a screw mounting hole of the base chassis as a screw hole to which a mounting screw is fastened;
The disk drive device according to claim 7, wherein the screw hole of the bracket is formed as an insertion hole through which a mounting screw is inserted by extending in a direction orthogonal to the radial direction of the disk-shaped recording medium. The positioning hole of the base chassis and the positioning hole of the bracket are inserted into the positioning pins provided on the cradle, thereby positioning the mounting surface portion of the base chassis and the mounting surface portion of the bracket. The disk drive device according to claim 7.

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