JP2008282484A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "disk device" which is capable of cleaning an objective lens provided on an optical head or a turn table holding a center hole of a disk efficiently in a short time and is also suitable for device miniaturization. <P>SOLUTION: A mechanism base 15 includes a lens cleaning member 100 and a table cleaning member 200. An objective lens 86a is moved to a cleaning position (n) and in such a state, a driving unit 14 is turned between a driving position (i) and a saving position (ii). In such turning, the objective lens 86a slides in contact with the lens cleaning member 100 and is cleaned by the lens cleaning member 100. Therefore, the objective lens 86a can be easily and efficiently cleaned. Furthermore, a supporting surface of a turn table 82 can also be cleaned by the table cleaning member 200. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disk device in which a drive unit equipped with a rotation drive unit and an optical head moves between a drive position for driving a disk and a retracted position, and in particular, rotation of an objective lens and a rotation drive unit of an optical head. The present invention relates to a disk device provided with a cleaning member for cleaning a table.

  In a disk device that reproduces data recorded on an optical disk or records data on an optical disk, a rotary drive unit that rotates the disk by clamping the center hole of the disk, and a recording surface of the optical disk that is irradiated with laser light is recorded. And an optical head for detecting reflected light from the surface.

  When a large amount of dust and debris present in the disk device equipment accumulates on the objective lens provided on the optical head, laser light applied from the optical head to the recording surface of the optical disk, or from the recording surface of the optical disk into the optical head. The returning light is blocked by dust or dust, and there arises a problem that the error rate becomes high when reading data recorded on the recording surface of the optical disk. Also, if dust or dirt accumulates on the rotary table provided in the rotary drive unit, the surface of the optical disk cannot be reliably installed on the rotary table, which may cause disc clamping failure in the rotary drive unit. .

  The following Patent Document 1 discloses a disk device that cleans an objective lens provided in an optical head.

  This disk device is provided with a disk storage section for storing a plurality of disks, and a recording / reproducing apparatus disposed below the disk storage section. When any of the plurality of disks stored in the disk storage unit is selected by the transport mechanism and the selected disk is loaded into the recording / reproducing apparatus, the disk is driven to rotate in the recording / reproducing apparatus and recorded on the disk. The recorded data is read and recorded on the disk.

  A cleaning cartridge dedicated to cleaning is stored in the disk storage portion, and the cleaning cartridge is pulled out of the disk storage portion and loaded into the recording / reproducing apparatus by a transfer mechanism. The cleaning cartridge is provided with a cleaning disk and a cleaning brush, the cleaning disk is rotated in the recording / reproducing apparatus, and the objective lens of the optical head is cleaned with the cleaning brush.

  Patent Document 2 below discloses a disk device that can clean an objective lens provided in an optical head.

This disk device is provided with a sled mechanism for moving the optical head further outward than the outer peripheral edge of the recording surface of the disk that is driven to rotate. In addition, a cleaning member located outside the rotating disk is provided in the housing, and when the optical head is sent outside the outer peripheral edge of the disk, the objective lens of the optical head is cleaned by the cleaning member. Is done.
Japanese Patent Laid-Open No. 5-54513 JP 2004-348931 A

  In the disk device described in Patent Document 1, each time the recording / reproducing device is to be cleaned, the cleaning cartridge is pulled out from the disk storage portion and loaded into the recording / reproducing device by the transfer mechanism. And a special time is required when cleaning the recording / reproducing apparatus.

  In the disk device described in Patent Document 2, it is necessary to move the optical head further outward than the outer peripheral edge of the disk held by the rotary table. For this reason, the overall length of the thread mechanism is increased, which hinders downsizing of the disk device. In addition, when the disk is held by a rotary table and the disk is rotated to perform a reproducing operation or a recording operation, it is necessary to reciprocate the optical head within a moving range shorter than the length of the sled mechanism. The movement control is also complicated.

  The present invention solves the above-described conventional problems, and can efficiently clean the objective lens provided on the optical head and the rotary table that holds the center hole of the disk in a short time and reduce the size of the device. It is an object of the present invention to provide a suitable disk device.

According to a first aspect of the present invention, a disk storage area in which a plurality of disks are stacked and stored in the thickness direction in the housing, and a selection unit that selects any of the disks in the disk storage area are selected. A drive unit equipped with a rotary drive unit for holding and rotating the disk and an optical head facing the rotating disk;
A switching mechanism that moves the drive unit between a retracted position that is disengaged from the outer peripheral edge of the disk in the disk storage area and a drive position that rotates the disk at a position that overlaps the disk in the disk storage area; And
The optical head is provided with an objective lens for providing detection light to the recording surface of the rotating disk, and a cleaning member for cleaning the objective lens is provided in the housing.
The objective lens that moves together with the drive unit when the drive unit moves toward the retracted position and when it moves toward the drive position is moved by the driving force of the drive unit and the cleaning member. It is characterized by sliding.

  In the disk device of the present invention, the objective lens of the optical head is moved by the moving force when the driving unit having the rotation driving unit and the optical head moves to the driving position or the moving force when the driving unit moves to the retracted position. The objective lens is cleaned by sliding with the cleaning member. Therefore, the objective lens can be cleaned without moving the cleaning member. Moreover, since the objective lens is cleaned within the normal control operation in which the drive unit moves to the drive position or the retracted position, it is not necessary to provide a special time for cleaning the objective lens.

  According to the present invention, the drive unit is provided with a sled mechanism for moving the optical head along a recording surface of the disk within a predetermined moving range, and the optical head is located at any position within the moving range. The objective lens slides with the cleaning member only when it is stopped at the cleaning position.

  In the optical head, the position facing the inner periphery of the disk is the initial position, and the cleaning position is on the outer periphery side of the disk from the initial position. For example, the cleaning position is within the movement range of the optical head. Is the outermost peripheral side of the disk.

  As described above, the optical head is moved to the cleaning position, which is a special position in the movement range, and stopped, and the drive unit is moved to the retracted position or moved to the drive position. The lens can only be cleaned when necessary. That is, the objective lens does not always slide with the cleaning member, and the probability of damaging the objective lens can be reduced.

  For example, when the number of times the drive unit moves from the retracted position to the drive position reaches a predetermined number, the optical head is moved to the cleaning position. Alternatively, the data recorded on the recording surface of the disk is read by the optical head, and the optical head is moved to the cleaning position when the error rate of the read data becomes a predetermined value or more.

  Furthermore, in the present invention, it is preferable that the optical head is moved to the cleaning position only when the temperature is within a predetermined range.

  For example, when the use environment temperature is abnormally high or abnormally low, the objective lens can be prevented from sliding with the cleaning member, and the objective lens can be prevented from being damaged at a high temperature or a low temperature.

According to a second aspect of the present invention, a disk storage area in which a plurality of disks are stacked and stored in the thickness direction in the housing, and a selection means for selecting any of the disks in the disk storage area are selected. A drive unit equipped with a rotary table for holding and rotating a disk and an optical head facing the rotating disk;
A switching mechanism that moves the drive unit between a retracted position that is disengaged from the outer peripheral edge of the disk in the disk storage area and a drive position that rotates the disk at a position that overlaps the disk in the disk storage area; And
The rotary table is provided with a convex portion that enters the center hole of the disc, a support surface on which the surface of the disc is installed, and a clamp member that holds the disc in a state where the surface of the disc is installed on the support surface, A cleaning member for cleaning the support surface is provided in the housing,
When at least one of the drive unit moves toward the retracted position and the drive position, the support surface of the rotary table that moves together with the drive unit is driven by the moving force of the drive unit. It slides with the cleaning member.

  In the second aspect of the present invention, the support surface of the rotary table can be cleaned by a moving force when the drive unit is moved to the drive position or the retracted position. Dust and dust can be prevented from accumulating on the support surface, the disc surface can be brought into close contact with the support surface, and the disc holding error can be reduced by the clamp member.

  Preferably, the rotary table is rotated in a state where the support surface of the rotary table is in contact with the cleaning member.

  By rotating the rotary table while the support surface and the cleaning member are in contact with each other, the entire circumference of the support surface can be cleaned cleanly in a short time. However, even if the rotary table is not rotated, every time the drive unit moves to the drive position or the retracted position and the rotary table slides, the slide position on the support surface of the rotary table is changed. Therefore, it is possible to clean the entire circumference of the support surface by repeating the cleaning.

  In the present invention, for example, when the number of times the drive unit moves from the retracted position to the standby position reaches a predetermined number, the drive unit moves to the retracted position after the movement, or after the movement, The turntable is rotated.

  Also in this case, it is preferable that the rotary table is rotated only when the temperature is within a predetermined range.

  In the present invention, when the disk cannot be normally held by the rotary table, the disk is stored in the disk storage area, the support surface is slid with the cleaning member, and then the disk storage is performed. It is preferable to hold the disk stored in the area on the rotary table.

  When the disk cannot be normally held on the rotary table, the support surface of the rotary table can be cleaned by removing the disk once and performing the cleaning operation, and then the disk can be held.

  In the disk device of the present invention, the objective lens provided on the optical head and the support surface of the rotary table can be reliably cleaned without providing a special cleaning time.

  FIG. 1 is an exploded perspective view showing the overall structure of a disk device according to an embodiment of the present invention, and FIG. 2 is a perspective plan view of the disk device. FIG. 3 is an enlarged side view showing the operation of the rotary table and the clamp member. FIG. 4 is a plan view showing the operation of the disk device.

  A disk device 1 shown in FIG. 1 has a box-shaped housing 2. In FIG. 1, the reference direction of the housing 2 is the lower side on the Z1 side, the upper side on the Z2 side, the left side on the X1 side, the right side on the X2 side, the front side on the Y1 side, and the rear side on the Y2 side. Further, the X1-X2 direction shown in the figure is the horizontal direction, and the Y1-Y2 direction is the depth direction.

  The housing 2 is assembled by sequentially stacking a lower housing 3, an intermediate housing 4, and an upper housing 5 from the bottom to the top. The lower housing 3 has a bottom surface 6 of the housing 2, and the intermediate housing 4 has a front surface 7 and a right surface 8 of the housing 2, and an insertion slot through which the disk D is inserted / extracted from the front surface 7. 23 is open. The upper housing 5 has a left side surface 9, a rear surface 10, and a ceiling surface 11 of the housing 2.

  As shown in FIG. 1, a first switching mechanism 12 is provided on the upper surface of the bottom surface 6 of the lower housing 3. The first switching mechanism 12 is provided with a rack member 30 that is driven in the Y1-Y2 direction by the power of a switching motor (not shown).

  In the lower housing 3, a unit support base 13 is provided on the first switching mechanism 12. The unit support base 13 is elastically supported by a plurality of dampers 18 provided on the bottom surface 6 of the lower housing 3. The unit support base 13 is provided with a restriction shaft 13a protruding in the Y2 direction shown in the figure and a pair of restriction shafts 13b and 13b protruding in the Y1 direction shown in the figure.

  In the lower housing 3, a lock member 54 is provided inside the side plate on the Y2 side, and a control hole 56 is formed in the lock member 54. The restriction shaft 13 a provided on the unit support base 13 is inserted into the control hole 56. A lock member (not shown) is also provided on the inside of the side plate on the Y1 side of the lower housing 3, and two control holes are formed in the lock member, thereby restricting shafts 13b and 13b provided in the unit support base 13. Is inserted into each of the two control holes.

  In the first switching mechanism 12, the moving force of the rack member 30 is applied to the lock switching slider 36 via the rotating arm 35. The lock switching slider 36 moves the lock member 54 and other lock members provided on the inner side of the Y1 side plate in the X1 direction or the X2 direction.

  A drive unit 14 is installed on the unit support base 13. As shown in FIG. 1, the drive unit 14 is provided with a rectangular drive base 81. A spindle motor 85 shown in FIG. 3 is installed on the drive base 81, and a rotary table 82, which is a rotary drive unit, is fixed to the rotary shaft of the spindle motor 85. The turntable 82 is formed of a synthetic resin material, and a support surface 82b with which the lower surface of the disk D abuts and a convex portion 82a that protrudes in the Z2 direction from the support surface 82b and enters the center hole Da of the disk D are integrated. Is formed. On the surface of the support surface 82b, a friction sheet, such as silicone rubber, is attached to enhance the frictional force with the disk D.

  As shown in FIG. 3, the convex part 82a of the turntable 82 has notches 82c formed at three locations on the outer periphery thereof. Three clamp members 83 are provided inside the convex portion 82a, and each clamp member 83 protrudes in the radial direction of the disk D through each notch portion 82c as shown in FIG. It is biased by a spring so as to be in a posture. A clamp mechanism is provided in the convex portion 82a. When each clamp member 83 is retracted into the convex portion 82a by the clamp mechanism, each clamp member 83 assumes a clamp release posture. The power of the first switching mechanism 12 shown in FIG. 1 is transmitted to the clamp mechanism via a transmission mechanism provided on the drive base 81, and the clamp member 83 is pulled from the clamp posture to the clamp release posture.

  An optical head 86 is mounted on the drive base 81 of the drive unit 14. The optical head 86 is provided with an objective lens 86a. The optical axis of the objective lens 86 a faces the recording surface of the disk D held on the rotary table 82. In the optical head 86, a light emitting element that emits laser light as detection light, an optical element that directs detection light toward the optical axis of the objective lens 86a, and the objective lens 86a are irradiated and reflected by the recording surface of the disk D. And a detection element for detecting the return light returned through the objective lens 83. In addition, a focus servo mechanism that focuses the detection light emitted from the objective lens 86a on the recording surface of the disk D, and a tracking servo mechanism that causes the detection light emitted from the objective lens 86a to follow the recording track on the recording surface of the disk D. Is provided.

  The drive base 81 of the drive unit 14 is provided with a sled mechanism that moves the optical head 86 from the direction approaching the turntable 82 toward the direction away from the turntable 82. The sled mechanism includes a guide shaft that guides the optical head 86 so as to move linearly, a sled motor mounted on the drive base 81, and a screw shaft that is rotated by the sled motor. Is moved by the rotational force of the screw shaft. The moving range of the optical head 86 moved by the sled mechanism is within the range of the length of the recording surface of the disk D in the radial direction. That is, when the optical head 86 is closest to the rotary table 82, the objective lens 86a faces the innermost peripheral portion of the recording surface of the disk D, and when the optical head 86 is farthest from the rotary table 82, the objective lens 86a is opposed. The lens 86 a faces the outermost peripheral portion of the recording surface of the disk D.

  As shown in FIG. 1, the unit support base 13 is provided with a support shaft 80 that rises perpendicularly to the end on the Y2 side in the drawing, and the drive base 81 of the drive unit 14 rotates in the horizontal direction around the support shaft 80. It is supported so that it can move. In FIG. 1, the drive unit 14 is in a retracted position away from the outer periphery of the disk D stored in the disk storage area 20. In FIG. 4, this retracted position is indicated by (ii). When rotating in the direction of arrow (a) from the retracted position (ii), as shown in FIGS. 2 and 4, the rotary table 82 moves to substantially the center of the lower housing 3, and the drive unit 14 is stored in the disk. The disk D selected from the area 20 is set to a drive position (i) where the disk D can be rotationally driven.

  The drive unit 14 is rotated from the retracted position (ii) shown in FIG. 4 toward the drive position (i) by the first switching mechanism 12 shown in FIG. As shown in FIG. 1, the first switching mechanism 12 is provided with a switching slider 34 that moves in the Y1-Y2 direction together with the rack member 30, and a drive pin 33 is fixed to the switching slider 34. When the rack member 30 is moved in the Y2 direction in the figure, the switching slider 34 is moved in the Y2 direction in the figure, and the drive unit 14 is rotated to the retracted position (ii) shown in FIG. Retained. When the rack member 30 moves in the Y1 direction in the drawing and the switching slider 34 moves in the Y1 direction in the drawing, the drive unit 14 is rotated in the arrow (a) direction by the drive pin 33, and the drive shown in FIG. Moved to position (i).

  As shown in FIG. 1, a mechanism base 15 parallel to the bottom surface 6 is provided on the upper portion of the intermediate casing 4, and a second switching mechanism 16 is provided on the mechanism base 15.

  As shown in FIG. 4, a lens cleaning member 100 for cleaning the objective lens 86a of the optical head 86 is provided on the lower surface of the mechanism base 15 facing the Z1 side. The lens cleaning member 100 is provided with a cleaning brush, felt, or the like that protrudes toward the Z1 side and contacts the objective lens 86a.

  The lens cleaning member 100 is provided at a position that contacts the objective lens 86 a of the optical head 86 when the drive unit 14 is rotated to the retracted position (ii) where it does not overlap the disk D in the disk storage area 20.

  Since the inner periphery of the recording area of the disk D loaded in this type of disk device is the TOC area, the optical head 86 is indicated by a solid line in FIG. 4 in the drive unit 14 before the reproduction operation is started. Thus, it is in the position closest to the rotary table 82 in the movement range of the sled mechanism. This position is the initial position (m). Normally, when the drive unit 14 rotates from the retracted position (ii) to the drive position (i) and when it rotates from the drive position (i) to the retracted position (ii), the optical head 86 is moved to the initial position ( m).

  When the drive unit 14 moves to the retracted position (ii) when the optical head 86 moves to the outer peripheral side from the initial position (m) and stops at the cleaning position (n) by the sled mechanism, the lens The cleaning member 100 contacts the objective lens 86a. That is, when the optical head 86 is at the initial position (m), the objective lens 86a does not contact the head cleaning member 100 even if the drive unit 14 moves to the retracted position (ii). Also, when the optical head 86 is moved to the cleaning position (n) and the drive unit 14 is moved to the retracted position (ii) only when cleaning is required, the objective lens 86a contacts the lens cleaning member 100. Touch.

  When the optical head 86 is at the cleaning position (n), the moving force when the drive unit 14 rotates in the direction (c) toward the retracted position (ii) and the drive unit 14 toward the drive position (i). The objective lens 86a slides on the head cleaning member 100 by the moving force when rotating in the direction (a), and the objective lens 86a is cleaned.

  Thus, since the objective lens 86a slides with the lens cleaning member 100 using the moving force that the drive unit 14 rotates between the retracted position (ii) and the drive position (i), the lens cleaning member Even without moving 100, the objective lens 86a can be cleaned. Further, since the objective lens 86a is cleaned during the normal switching operation of moving the drive unit 14 between the retracted position (ii) and the drive position (i), a cleaning operation time is set specially. do not have to.

  In addition, the objective lens 86a can be cleaned only when necessary by moving the optical head 86 from the initial position (m) to the cleaning position (n). The cleaning position (n) of the optical head 86 at this time may be any position as long as it is on the outer peripheral side with respect to the initial position (m). However, when the optical head 86 is set at a position farthest from the rotary table 82 in the movement range, the optical head 86 can be shifted to the cleaning operation simply by moving the optical head 86 to the final position on the outer peripheral side by the sled mechanism. This eliminates the need for position control for stopping the optical head at the cleaning position.

  As shown in FIG. 4, a table cleaning member 200 for cleaning the support surface 82 b of the rotary table 82 is provided on the surface of the mechanism base 15 on the Z1 side. The table cleaning member 200 also has a cleaning brush or felt oriented in the Z1 direction.

  The table cleaning member 200 is provided at a portion that contacts the support surface 82b of the rotary table 82 when the drive unit 14 is in the retracted position (ii). The area of the table cleaning member 200 is smaller than the area of the support surface 82b of the rotary table 82, and when the drive unit 14 moves to the retracted position (ii), the table cleaning member 200 moves to the support surface 82b of the rotary table 82. Hit only a part. Further, the moving force when the drive unit 14 rotates in the (c) direction toward the retracted position (ii) and the movement force when the drive unit 14 rotates in the (a) direction toward the drive position (i). The support surface 82b slides with the table cleaning member 200 by the moving force.

  Each time the drive unit 14 moves to the retracted position (ii), the contact position between the support surface 82b of the rotary table 82 and the table cleaning member 200 changes, so that the drive position (i) of the drive unit 14 and the retracted position (ii) ) Is repeated, almost the entire support surface 82b can be cleaned. Further, when the drive unit 14 is in the retracted position (ii) and the table cleaning member 200 and the support surface 82b are in contact with each other, the spindle motor 85 is started to rotate the rotary table 82, thereby supporting the surface 82b. Can be effectively cleaned.

  As shown in FIGS. 1 and 2, the intermediate housing 4 is provided with a transfer unit 17 below the mechanism base 15 and inside the front surface 7.

  The transfer unit 17 is provided with a pair of transfer rollers 112 and 113 which are divided into left and right. The pair of transfer rollers 112 and 113 are provided on the outer periphery of a single roller shaft 114. A synthetic resin sandwiching member facing the pair of transport rollers 112 and 113 is fixed to the transport unit 17, and the pair of transport rollers 112 and 113 are pressed against the sandwiching member by a spring force. Yes. The disc D inserted from the insertion port 23 is sandwiched between a pair of transfer rollers 112 and 113 and a sandwiching member.

  As shown in FIG. 1, a support shaft 17a is vertically fixed to the bottom surface of the lower housing 3, and an end portion on the X1 side of the transfer unit 17 is rotatably supported by the support shaft 17a. In FIG. 1, the transfer unit 17 is in a standby position along the inside of the front surface 7. The transfer unit 17 in the standby position is located outside the outer peripheral edge of the disk D accommodated in the housing 2.

  As shown in FIG. 1, the second switching mechanism 16 is provided with an arc-shaped drive member 37, which is driven by the power of a second transfer motor M2 (not shown) provided on the mechanism base 15. The member 37 moves along an arc locus in the longitudinal direction. A rotation link 38 is rotatably supported on the mechanism base 15. When the drive member 37 moves in the Y2 direction, the rotation link 38 is rotated counterclockwise by the moving force of the drive member 37. At this time, the transfer unit 17 is rotated in the direction (b) with the support shaft 17a as a fulcrum by the turning force of the rotation link 38, moved to the transfer operation position shown in FIG.

  A first transfer motor M1 (not shown) is provided in the lower housing 3 shown in FIG. A transmission gear 17b is rotatably supported on the support shaft 17a, and the transmission gear 17b is rotated by the first transfer motor M1. The rotational force of the transmission gear 17b is transmitted to the roller shaft 114 in the transfer unit 17, and the pair of transfer rollers 112 and 113 are rotationally driven.

  As shown in FIG. 1, an area surrounded by the left side surface 9, the rear surface 10, and the ceiling surface 11 of the upper housing 5 is a disk storage area 20, and the disk storage area 20 includes a plurality of supports 21. Are arranged in the Z1-Z2 direction, which is the thickness direction. In this embodiment, six support bodies 21 are provided.

  The upper casing 5 is provided with support body selection means 22. The support body selection means 22 are screw shafts provided at three locations, and each is rotatably supported on the ceiling surface 11. Each of the plurality of supports 21 is slidably fitted in the screw groove of the support selection means 22. When each support body selection means 22 is rotationally driven in synchronization by a selection motor (not shown), each support body 21 is moved in the Z1-Z2 direction by the screw groove, and the support body 21 is selected. . The selected support body 21 is set at a selection position that is substantially the same height as the insertion slot 23, and a large gap is formed between the support body 21 at the selection position and the support body 21 located therebelow.

  The disc D inserted from the insertion port 23 and carried into the housing 2 is installed on the lower surface of the support 21 at the selected position. As shown in FIG. 2, holding claws 25, 26, and 27 are provided at three locations on the lower surface of each support body 21. Each holding claw 25, 26, 27 is rotatably supported by the support 21, and the rotation center thereof coincides with the rotation center of the respective support selection means 22. Each holding claw 25, 26, 27 is urged by a spring so as to protrude toward the center of the support 21, and the disk D has a lower surface of the support 21 and three holding claws 25, 26, 27. Held between. A holding release mechanism (not shown) is provided in the housing 2, and the holding claws 25, 26, 27 of the support body 21 moved to the selected position face the holding release mechanism. When the disk D held on the support 21 moved to the selected position is clamped on the rotary table 82, the holding claws 25, 26, 27 are rotated by the holding release mechanism, and the holding claws 25, 26 and 27 are retracted to a position where they do not overlap with the disk D, and the disk D and the support 21 are separated.

  The disk D has a diameter of 12 cm and is, for example, a CD (compact disk), a CD-ROM, a DVD (digital versatile disk), and the like, and has a center hole D1.

Next, the operation of the disk device 1 of the present invention will be described.
In the disk device 1, when the disk D is inserted from the insertion port 23, an operation unit or a remote controller located on the Y1 side of the front surface 7 of the housing 2 is operated to be positioned in the disk storage area 20. Among the supports 21, an empty support 21 that does not hold the disk D is selected.

  When the selection operation of the support 21 is performed, the drive unit 14 is rotated to the retracted position (ii) along the inside of the right side surface 8 of the housing 2 by the first switching mechanism 12 shown in FIG. Further, the transfer unit 17 is set at a standby position along the inside of the front surface 7 by the second switching mechanism 16. In this way, all the screw shafts of the support body selection means 22 are rotated synchronously in a state where both the drive unit 14 and the transfer unit 17 do not come into contact with the disk D in the disk storage area 20. The selection operation is performed. And the selected support body 21 moves to the selection position of the substantially same height as the insertion port 23, and stops.

  Next, the first switching mechanism 12 is started, the drive unit 14 is rotated in the direction (a), and the drive unit 14 is set to the drive position (i) shown in FIG. When the disc D is inserted from the insertion port 23, the disc D is detected by the insertion detection member. Based on this detection operation, the control unit issues a control command, and the loading operation of the disk D is performed based on the control command.

  In the disk carry-in operation, first, the first transfer motor M1 is started in a state where the transfer unit 17 is stopped at the standby position approaching the inside of the front surface 7 as shown in FIG. 113 rotates in the disc loading direction. The disc D inserted from the insertion port 23 is sandwiched between the transfer rollers 112 and 113 in the transfer unit 17 and the clamping member, and is moved along the insertion center line Oa shown in FIG. 2 by the rotational force of the transfer rollers 112 and 113. It is carried toward the inside of the housing 2. When the disk D is carried to a certain extent, the second transfer motor M2 is started, the drive member 37 of the second switching mechanism 16 shown in FIG. 1 is driven in the Y2 direction, and the rotation link 38 is counterclockwise. The transfer unit 17 is rotated counterclockwise (direction (b)) about the fulcrum shaft 17a and set to the transfer operation position shown in FIG.

  In the above operation, the disk D is fed into the housing 2 by both the rotational force of the transfer rollers 112 and 113 and the rotational force of the transfer unit 17 in the direction (b), and the disk D is selected. It is fed to the lower surface of the support 21 at the position. The disk D is fed into the lower surface of the support 21 at the selected position and is sandwiched between the lower surface of the support 21 and the holding claws 25, 26, 27.

  Thereafter, the entire unit support base 13 shown in FIG. 1 is lifted, and the convex portion 82a of the rotary table 82 provided in the drive unit 14 is placed in the center hole Da of the disk D held by the support 21 at the selected position. Get in. In this state, when the switching slider 34 of the first switching mechanism 12 shown in FIG. 1 further moves in the Y1 direction, the moving force is transmitted to the clamp mechanism via the transmission mechanism in the drive unit 14, and shown in FIG. Thus, the clamp member 83 protrudes in the radial direction. The clamp member 83 presses the center hole Da of the disk D from the inside, and the disk D is held on the rotary table 82 in a state where the lower surface of the disk D is in close contact with the support surface 82 b of the rotary table 82.

  After that, the transfer unit 17 is moved to a standby position along the inside of the front surface 7 of the housing 2 while the transfer rollers 112 and 113 are rotated in the disk loading direction. Then, the transfer rollers 112 and 113 are detached from the outer periphery of the disk D.

  Further, the holding claws 25, 26, 27 provided on the support 21 at the selected position are rotated by the holding release mechanism, and the holding of the disk D on the lower surface of the support 21 is released. Further, the unit support base 13 shown in FIG. 1 is in an elastic support state supported by the damper 18, the disk D is rotationally driven together with the rotary table 82, and the optical head 85 performs an information reading operation or an information recording operation. Done.

  Next, when information is read from or recorded on the disk D held on the other support 21 in the disk storage area 20, the rotation of the rotary table 82 is stopped, and the unit support base shown in FIG. 13 is lifted, and the disk D held on the rotary table 82 is supplied to the lower surface of the support 21 at the selected position, and the disk D is held by the support 21 and the holding claws 25, 26, 27. . After that, the clamp member 83 shown in FIG. 3 is retracted into the rotary table 82 to be in the clamp release posture. Further, the drive unit 14 is moved to the retracted position (ii) shown in FIG. 4, the support body selection means 22 is operated, and another support body 21 is selected and stopped at the selected position.

  When the other support 21 stops at the selected position, the drive unit 14 rotates in the direction (a) to reach the drive position (i) shown in FIG. The disk D on the lower surface is set on the rotary table 82 and the disk D is clamped. Further, the holding of the disk D by the holding claws 25, 26, 27 is released, and the disk D can be reproduced and data can be recorded.

  Thus, the drive unit 14 rotates between the retracted position (ii) and the drive position (i) shown in FIG. 4 every time the support body 21 is selected.

  At this time, the optical head 86 is in the initial position (m) shown in FIG. 4, and even if the drive unit 14 moves toward the retracted position (ii), the objective lens 86 a of the optical head 86 is in contact with the lens cleaning member 100. I will not win.

  When a command to clean the objective lens 86a is issued from the control unit, the sled mechanism is operated before or during the movement of the drive unit 14 from the drive position (i) to the retracted position (ii). The optical head 86 moves to the cleaning position (n) and stops. Note that the optical head 86 may be moved to the cleaning position (n) when the drive unit 14 is stopped at the retracted position (ii).

  When the optical head 86 is at the cleaning position (n), the drive unit 14 rotates in the direction (c) toward the retracted position (ii), or the drive unit 14 moves toward the drive position (i) (a ) Direction, the objective lens 86a slides with the lens cleaning member 100 by the moving force, and the objective lens 86a is cleaned.

  The command for cleaning the objective lens 86a is issued from the control unit in the following cases, for example.

(A) When the number of times the drive unit 14 moves from the retracted position (ii) to the drive position (i) exceeds a predetermined number of times,
(A) When the time for rotationally driving the disk D for reproduction or recording exceeds a predetermined time,
(C) When the disk D is rotationally driven by the rotary table 82 and the information recorded on the disk D is read by the optical head 86, and the reading error rate at this time exceeds a certain range,
(D) When the focus servo mechanism is not in a stable state (locked state) when the disk D is rotationally driven by the rotary table 82 and the reproducing operation is performed by the optical head 86,
In the above case, the optical head 86 is set to the cleaning position (n) while the drive unit 14 reciprocates once from drive position (i) → retracted position (ii) → drive position (i). Alternatively, the optical head 86 may be set at the cleaning position (n) each time the reciprocating operation is performed while the reciprocating operation is performed a predetermined number of times.

  Thus, since the objective lens 86a slides with the lens cleaning member 100 only when cleaning is necessary, it is possible to prevent the objective lens 86a from sliding more than necessary and damaging the objective lens 86a.

  In addition, when a temperature sensor is provided inside the housing 2 and the temperature measured by the temperature sensor is equal to or higher than a predetermined value such as 100 ° C. or lower than a predetermined value such as 0 ° C., the control unit Even if the conditions (a) to (d) are recognized, it is preferable that a lens cleaning command is not issued. Thereby, it can prevent that the objective lens 86a slides with the lens cleaning member 100, and the objective lens 86a is damaged in high temperature and low temperature environment.

  Further, when the drive unit 14 rotates in the (c) direction to reach the retracted position (ii), and when the drive unit 14 rotates in the (a) direction to reach the drive position (i). Due to the moving force, a part of the support surface 82 b of the rotary table 82 slidably contacts the table cleaning member 200, and a part of the support surface 82 b is cleaned by the table cleaning member 200. Every time the drive unit 14 reaches the retracted position (ii), the position where the support surface 82b of the rotary table 82 and the table cleaning member 200 slide changes so that dust and dust on the support surface 82b are always removed. Thus, the disk D can be reliably installed on the support surface 82b.

  Further, when the drive unit 14 is at the retracted position (ii), the spindle motor 85 may be started and the rotary table 82 may be rotated for a short time. By this cleaning operation, the entire circumference of the support surface 82b of the rotary table 82 can be cleaned.

For example, the rotary table 82 is rotated under the following conditions.
(E) When the number of times the drive unit 14 moves from the retracted position (ii) to the drive position (i) exceeds a predetermined number of times,
(F) When the time for rotationally driving the disk D for reproduction or recording exceeds a predetermined time,
(G) When the center hole Da of the disk D cannot be securely clamped by the clamp member 83 shown in FIG.
As shown in FIG. 3, whether or not the clamp is securely performed in the above (g) is determined by inserting the disk D with the support rollers 112 and 113 of the transfer unit 17 with the clamp member 83 protruding. It is performed by energizing the spindle motor 85 by sandwiching it with the sliding member. At this time, if the turntable 82 rotates, it is determined that the clamping operation is defective. In this case, the disk D on the rotary table 82 is supplied to the lower surface of the support 21 at the selected position, and the disk D is held by the support 21 and the holding claws 25, 26, 27. Then, the clamp member 83 shown in FIG. 3 is retracted into the rotary table 82 to release the clamp, the drive unit 14 is moved to the retracted position (ii) shown in FIG. 4, and the rotary table 82 is rotated. By this rotation, the support surface 82b of the rotary table 82 is cleaned by the table cleaning member 200, and then the drive unit 14 is moved again to the drive position (i) shown in FIG. 4 and held by the support 21 at the selected position. Clamp the existing disk D.

  However, it is preferable that the cleaning operation of rotating the rotary table 82 and sliding with the table cleaning member 200 is not performed in a high temperature environment where the temperature in the housing 2 is a predetermined value or higher or a low temperature environment where the temperature is lower than a predetermined value. . Since a friction enhancing sheet such as silicone rubber is stuck on the support surface 82b of the rotary table 82, excessive rubbing of the sheet in a high temperature environment may cause problems such as tearing or peeling of the sheet.

  In the above embodiment, the drive unit 14 rotates between the drive position (i) and the retracted position (ii), but the drive unit moves linearly between the retracted position and the drive position. It may be.

1 is an exploded perspective view showing the overall structure of a disk device according to an embodiment of the present invention; A perspective plan view of the disk device, An enlarged side view showing a rotary table and a clamp member, A plan view for explaining the cleaning operation,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disk apparatus 2 Case 14 Drive unit 17 Transfer unit 21 Support body 25, 26, 27 Holding claw 82 Rotating table 82a Protruding part 82b Support surface 83 Clamp member 85 Spindle motor 86 Optical head 86a Objective lens 100 Lens cleaning member 200 Table cleaning Element

Claims (12)

A disk storage area in which a plurality of disks are stacked and stored in the thickness direction in the housing, selection means for selecting one of the disks in the disk storage area, and holding and rotating the selected disk A drive unit equipped with a rotary drive unit and an optical head facing the rotating disk; and
A switching mechanism that moves the drive unit between a retracted position that is disengaged from the outer peripheral edge of the disk in the disk storage area and a drive position that rotates the disk at a position that overlaps the disk in the disk storage area; And
The optical head is provided with an objective lens for providing detection light to the recording surface of the rotating disk, and a cleaning member for cleaning the objective lens is provided in the housing.
The objective lens that moves together with the drive unit when the drive unit moves toward the retracted position and when it moves toward the drive position is moved by the driving force of the drive unit and the cleaning member. A disk device characterized by sliding.   The drive unit is provided with a sled mechanism for moving the optical head within a predetermined movement range along the recording surface of the disk, and the optical head is at a cleaning position at any location within the movement range. The disk device according to claim 1, wherein the objective lens slides with the cleaning member only when stopped.   The disk apparatus according to claim 2, wherein the optical head has a position facing the inner periphery of the disk as an initial position, and the cleaning position is closer to the outer periphery of the disk than the initial position.   4. The disk apparatus according to claim 3, wherein the cleaning position is the outermost peripheral side of the disk within the moving range of the optical head.   5. The disk device according to claim 2, wherein the optical head is moved to the cleaning position when the number of times that the drive unit moves from the retracted position to the drive position reaches a predetermined number.   6. The data recorded on a recording surface of a disk is read by the optical head, and the optical head is moved to the cleaning position when an error rate of the read data exceeds a predetermined value. The disk device according to the above.   7. The disk apparatus according to claim 2, wherein the optical head is moved to the cleaning position only when the temperature is within a predetermined range. A disk storage area in which a plurality of disks are stacked and stored in the thickness direction in the housing, selection means for selecting one of the disks in the disk storage area, and holding and rotating the selected disk A drive unit equipped with a rotary table and an optical head facing the rotating disk;
A switching mechanism that moves the drive unit between a retracted position that is disengaged from the outer peripheral edge of the disk in the disk storage area and a drive position that rotates the disk at a position that overlaps the disk in the disk storage area; And
The rotary table is provided with a convex portion that enters the center hole of the disc, a support surface on which the surface of the disc is installed, and a clamp member that holds the disc in a state where the surface of the disc is installed on the support surface. A cleaning member for cleaning the support surface is provided in the housing.
When at least one of the drive unit moves toward the retracted position and the drive position, the support surface of the rotary table that moves together with the drive unit is driven by the moving force of the drive unit. A disk device sliding with the cleaning member.   The disk device according to claim 8, wherein the rotary table is rotated in a state where the support surface of the rotary table is in contact with the cleaning member.   When the drive unit moves from the retracted position to the standby position a predetermined number of times, the rotary table is rotated when or after the drive unit moves to the retracted position. The disk device according to claim 8 or 9.   The disk device according to claim 10, wherein the rotary table is rotated only when the temperature is within a predetermined range.   When the disk cannot be normally held by the rotary table, the disk is stored in the disk storage area, the support surface is slid with the cleaning member, and then the disk is stored in the disk storage area. The disk device according to claim 8, wherein the rotary table is held on the rotary table.

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