JP2010113770A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "disk drive" which can reliably clamp a disk by using clampers, and can prevent slips from developing between the disk and the turntable when turning the disk. <P>SOLUTION: The clampers 201 formed in the rotating member 82 are biased by torsion springs in the α direction and pressed to the periphery of the center hole Da of the disk D. When starting to turn the rotating member 82, the spindle motor is driven in the direction β2 reverse to the normal direction (β1 direction), then switched to turn in the normal direction. By turning the member 82 in the β2 direction, the clampers 201 obtain torque in the α direction to increase their clamp power. Thus, with the member 82 subsequently turning in the normal β1 direction, the disk clamp by the clampers 201 hardly becomes loose. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a disk device in which a so-called self-clamp mechanism is mounted on a rotating member, and more particularly to a disk device that can strongly hold the center hole of the disk by the clamp member after the disk is installed on the rotating member.

  The following Patent Document 1 and Patent Document 2 disclose a disk device having a so-called self-clamping mechanism.

In the self-clamping mechanism, a convex part to be inserted into the center hole of the disk is provided at the central part of the rotating member that is rotated by the spindle motor, and a plurality of claw-shaped clamping members that protrude in the outer peripheral direction are provided in the convex part. It has been. When the center hole of the disc is fitted into the convex portion, the clamp member protrudes in the outer peripheral direction by the biasing force of the spring member, and is pressed against the peripheral portion of the center hole of the disc, whereby the disc is clamped to the rotating member.
JP 2001-35065 A JP 2006-294176 A

  In a disk device having a self-clamping mechanism, after the disk is carried onto the rotating member and the center hole of the disk is held by the clamping member, the motor is started and the rotating member is rotated. Therefore, even if the disc is held by the clamp member in a state of being slightly lifted from the rotating member, even if the center hole of the disc is not securely held by the clamp member, the disc rotates together with the rotating member. Will continue.

  In this case, when the rotation member is accelerated or decelerated while the disk is being driven, and the acceleration is given to the rotation member, the clamp member moves the peripheral portion of the center hole due to the relationship between the acceleration and the inertial force of the disk. It becomes easy to slide and the clamping force against the center hole is easy to loosen.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and the disk and the clamp member can be reliably clamped by the clamp member on the rotating member, and the acceleration is generated in the rotating member when the disk is driven to rotate. It is an object of the present invention to provide a disk device that can suppress the occurrence of slips between the two.

The present invention relates to a disk device having a rotating member that is rotationally driven by a motor, and a head that faces the disk clamped by the rotating member.
A table part on which the disk is placed on the rotating member, a clamp member that is rotatably supported inside a center hole of the disk placed on the table part, and each clamp member is placed in the center hole of the disk A spring member that is urged to rotate in a direction in pressure contact with the peripheral edge of the
A clamp switching member is provided for rotating the clamp member in a direction away from the peripheral edge of the center hole when the disc is installed on the rotating member and when the disc is detached from the rotating member;
After the disc is installed on the rotating member and the clamp member is pressed against the peripheral edge of the center hole, the rotating member is applied with a rotational force in the direction opposite to the rotational biasing direction applied from the spring member to the clamp member. The rotation direction of the motor is controlled so that the rotation direction is reversed and then the normal rotation operation is performed.

  Preferably, in the present invention, the clamp member has an inclined portion at a portion facing the table portion, and an inner peripheral edge of the disk is sandwiched between the table portion and the inclined portion.

  Further, the present invention provides a rotating device that is provided to the clamp member from the spring member by decelerating the rotating member that performs a normal rotating operation when stopping the rotation of the disk. Acceleration in the direction opposite to the direction of force is given.

  In the present invention, a rotatable clamp member is mounted on a rotating member, and the clamp member is urged to rotate by a spring member and is brought into pressure contact with the peripheral edge of the center hole of the disc, whereby the disc is clamped. In this case, when the rotation is started, if a rotational force in the same direction as the rotation biasing direction of the clamp member is given to the rotation member, the clamp member clamps the clamp member by the disk that is stopped by the inertial force. A turning force in the direction of releasing the force is given. On the other hand, when the rotation of the disc is started, if the rotational force is applied to the rotating member in the direction opposite to the rotational biasing direction of the clamp member, the clamp is pressed against the disc to be stopped by inertial force. A turning force is applied to the member in a direction that increases the pressure contact force. Therefore, even if the periphery of the center hole of the disc is not securely held by the clamp member, at the start, the rotating member is rotated in the direction opposite to the rotation biasing direction of the clamp member, and then the normal rotation is performed. By shifting to operation, the clamping force of the clamping member can be increased.

  The rotation direction of the rotating member in the normal rotation after the start is the same as the direction of the rotational biasing force acting on the clamp member. However, when trying to stop the rotation of the disk or reduce the rotation speed, an acceleration in the direction opposite to the rotation biasing direction applied to the clamp member is rotated with respect to the disk whose rotation is to be continued by inertia. Acts on the member. Therefore, at this time as well, turning force in a direction to increase the clamping force is applied to the clamping member.

  That is, according to the present invention, when starting the rotation of the disk, or when resuming the rotation after the stop, the rotational force that is reverse to the rotational biasing direction applied from the spring member to the clamp member is always applied to the rotating member. Then, the rotation direction is reversed to shift to the normal rotation operation, whereby the clamping force by the clamping member is increased at the time of starting or resuming the rotation. Further, when the rotation of the disk is terminated or when the rotation of the disk is temporarily stopped, the clamping member is given a rotational force in a direction to increase the clamping force. Therefore, the disk loaded on the rotating member is always firmly held by the clamp member.

  The present invention is provided with a conveying member that conveys a disk toward the rotating member, and after the disk is installed on the rotating member and the clamp member is pressed against the peripheral edge of the center hole, the conveying member It is preferable to apply a rotational force in the direction opposite to the rotational biasing direction to the rotating member while holding the disk, and then move the conveying member away from the disk and shift to a normal rotating operation.

  In a state where the disk is sandwiched between the conveying members, the disk can be further clamped more reliably by applying to the rotating member a rotational force in the direction opposite to the rotation biasing direction applied to the clamp member.

  In addition, as described above, when starting the rotation of the disk, the disk can also be inertial by applying a rotational force in the direction opposite to the rotational biasing direction to the clamp member without holding the disk. Since it tries to stop by force, it is possible to improve the clamping force by a clamp member.

  If the rotating member does not rotate when a rotating force in the direction opposite to the rotation urging direction is applied to the rotating member with the disk held between the conveying members, the center of the disk is It is also possible to determine that the hole is held normally.

  The disk device according to the present invention applies a rotational force in a direction opposite to the normal rotation direction to the rotating member for a predetermined time when starting the rotation of the disk, and then shifts to the normal rotating operation, thereby allowing the clamping member to move. Can increase the clamping force to the disc. Further, when the rotation of the disk is stopped or decelerated from the rotational drive in the normal rotation direction, the clamping force to the disk by the clamp member can be increased.

  1 is an exploded perspective view showing the overall structure of a disk apparatus according to an embodiment of the present invention, FIG. 2 is a plan view mainly showing a lower housing portion of the disk apparatus of FIG. 1, and FIGS. 3 and 4 are rotating members. FIG. 3 is a side view of the spindle motor and the clamp switching means, FIG. 3 shows a disk non-clamping state, and FIG. 4 shows a disk clamping state. 5 and 6 are plan views showing the structure of the clamp switching means for each operation, and FIG. 7 is a partially enlarged view of the clamp switching means. 8 and 9 are plan views showing the structure of the second power transmission unit according to the operation, and FIG. 10 shows the third power transmission unit, and is an exploded perspective view showing the structure of the rotation fulcrum of the transfer unit. It is.

  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 side surface 8 of the housing 2. The upper housing 5 has a left side surface 9, a rear surface 10, and a ceiling surface 11 of the housing 2.

  A first power transmission unit 12 is provided on the upper surface of the bottom surface 6 of the lower housing 3. A unit support base 13 is supported on the first power transmission unit 12, and a drive unit 14 is mounted on the unit support base 13. A mechanism base 15 parallel to the bottom surface 6 is provided on the upper portion of the intermediate casing 4, and a second power transmission unit 16 is provided on the mechanism base 15. In the intermediate housing 4, a transfer unit 17 is provided below the mechanism base 15 and inside the front surface 7. A third power transmission unit 19 is provided between the X1 side end of the transfer unit 17 and the bottom surface 6 of the lower housing 3.

  In the upper housing 5, an area surrounded by the left side surface 9, the rear surface 10, and the ceiling surface 11 is a disk storage area 20, and each of the disk storage areas 20 includes a plurality of supports that can support the disk D. 21 is arranged so as to be overlapped in the thickness direction (Z1-Z2 direction in the drawing).

  The upper casing 5 is provided with a support body selection means 22, and by the operation of the support body selection means 22, any one of the 6 support bodies 21 is selected and moved to the selected position, and is selected. The space | interval of the support body 21 and the support body 21 adjacent under it is expanded.

  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), or the like.

  As shown in FIG. 1, an insertion port 23 is opened on the front surface 7 of the housing 2. The insertion slot 23 has a slit shape, and the width dimension in the vertical direction is slightly larger than the thickness dimension of the disk D, and the opening width dimension W in the horizontal direction is slightly wider than the diameter of the disk D.

  The transfer unit 17 is at the same height as the insertion slot 23, and the disk D inserted from the insertion slot 23 is transferred toward the disk storage area 20 by the transfer unit 17. Of the plurality of supports 21, the support 21 that has reached the selected position is at the same height as the insertion slot 23, and the disk D inserted from the insertion slot 23 is transferred by the transfer unit 17 and selected. It is supplied and held on the lower surface of the support 21 in the position.

  Dampers 71, 72, and 73 that are elastic support members are fixed to three locations on the bottom surface 6 of the lower housing 3. The dampers 71, 72, 73 are such that a liquid or gas such as oil is enclosed in a flexible bag body such as rubber. Alternatively, a compression coil spring is combined with the bag.

  Support shafts are vertically fixed downward at three locations on the bottom surface of the unit support base 13, and each support shaft is supported by dampers 71, 72, 73. The unit support base 13 can be elastically supported on the bottom surface 6 of the housing 2 by the dampers 71, 72 and 73.

  The rear bent piece 13b of the unit support base 13 is provided with one restraint shaft 77 protruding in the Y2 direction shown in the figure. The restraint shaft 77 is placed in the lock control hole 56 of the lock member 54 shown in FIG. Has been inserted. The front bent piece 13a of the unit support base 13 is provided with a pair of restraining shafts 78, 78 projecting in the Y1 direction shown in the drawing, and each restraining shaft 78 is a lock provided on the Y1 side shown in FIG. It is inserted into the lock control hole of the member 61.

  The lock control hole 56 includes a restraining portion 56a extending toward the X1 side and approaching the bottom surface 6; a lifting portion 56b that is continuous from the restraining portion 56a on the X2 side and is away from the bottom surface 6; An escape portion 56c opened in an area sufficiently larger than the restraining shaft 77 is formed continuously on the X2 side of 56b. Similarly, the lock control hole provided on the Y1 side extends to the X1 side and approaches the bottom surface 6; a lifting portion that is continuously away from the bottom surface 6 on the X2 side; A continuous relief portion is formed on the side.

  When the lock member 54 and the lock member 61 are moved to the X2 side, the restraint shaft 77 is held by the restraint portion 56a, the restraint shafts 78 and 78 are held by the restraint portion on the Y1 side, and the unit support base 13 is It is lowered to a position approaching the bottom surface 6 of the body 2. At this time, the dampers 71, 72 and 73 are crushed toward the bottom surface 6. When the lock member 54 and the lock member 61 move to the X1 side, the restraint shaft 77 is lifted by the lifting portion 56b, the restraint shafts 78, 78 are lifted by the lift portion on the Y1 side, and the unit support base 13 is raised. When the lock member 54 and the lock member 61 are further moved to the X1 side, the restraint shaft 77 is moved into the escape portion 56c, the restraint shafts 78 and 78 are moved into the escape portion on the Y1 side, and the unit support base 13 is restrained. The unit support base 13 is released and elastically supported by the dampers 71, 72, 73.

  As shown in FIG. 2, the drive unit 14 has an elongated drive base 81. A support shaft 84 protrudes vertically upward from the back side of the unit support base 13, the drive base 81 is supported by the support shaft 84, and the drive unit 14 is rotatable along the XY plane. Yes.

  The drive unit 14 is rotated by the mechanism of the first power transmission unit 12 shown in FIG. The rotation range of the drive unit 14 is from the retracted position indicated by the solid line in FIG. 2 to the intervention position indicated by the broken line. When in the retracted position, the drive unit 14 is slightly separated from the outer peripheral edge of the disk D held on the support 21. When the drive unit 14 rotates to the intervention position, the rotation member 82 provided on the rotation free end side of the drive unit 14 moves to the inside of the disk storage area 20, and the rotation center of the rotation member 82 is set to the selected position. It coincides with the center hole Da of the disk D held on the moving support 21 in the vertical direction.

  As shown in FIGS. 3 and 4, a spindle motor Ms is fixedly provided on the upper surface of the drive base 81, and the spindle motor Ms is provided with a rotation shaft 82 a extending upward at the center so as to be rotationally driven. Yes. A rotating member 82 is fixed to the rotating shaft 82a. The rotating member 82 is made of synthetic resin, and a table portion 82b on which the lower surface of the disk D is installed and a convex portion 82c that protrudes upward (in the Z2 direction) at the center of the table portion 82b are integrally formed.

  A tapered surface 82d having a diameter that gradually increases toward the lower side (Z1 direction) is formed on the peripheral surface of the convex portion 82c. The diameter of the lower end portion of the convex portion 82c is set to be substantially the same as the inner diameter of the center hole Da of the disk D or slightly smaller than the inner diameter of the center hole Da. The inside of the convex part 82c is a hollow part, and a notch part 82e communicating with the hollow part is formed around the convex part 82c. The notches 82e are formed at three locations with an angular interval of 120 degrees centered on the rotation shaft 82a.

  The rotating member 82 is mounted with a clamping mechanism 200 for clamping the disk D to the upper surface of the table portion 82b. The clamp mechanism 200 is a so-called self-clamp mechanism. Hereinafter, the structure of the clamp mechanism 200 will be described.

  5 and 6 show three clamp members 201 provided inside the convex portion 82c of the rotary member 82, and a switching rotary portion provided between the rotary member 82 and the spindle motor Ms below it. 203 is shown in a state where the table portion 82b and the convex portion 82c are seen through.

  In the hollow portion of the convex portion 82c of the rotating member 82, three support shafts 82f that extend vertically downward from the upper end portion of the inner wall of the convex portion 82c are integrally provided. The support shafts 82f are arranged at three positions with an angular interval of 120 degrees centered on the rotation shaft 82a. The three clamp members 201 are made of a synthetic resin material, and the base portions of the clamp members 201 are rotatably supported by the support shafts 82f, respectively.

  A holding claw 201 a is integrally formed at the tip of the clamp member 201. As shown in FIG. 3 and FIG. 5, when the clamp member 201 rotates counterclockwise with the support shaft 82f as a fulcrum, the holding claw 201a is located inside the tapered surface 82d of the convex portion 82c in the notch portion 82e. Regress. This state is a non-clamping posture in which the convex portion 82c can be inserted into the center hole Da of the disk D. As shown in FIGS. 4 and 6, when the clamp member 201 rotates clockwise with the support shaft 82f as a fulcrum, the holding claw 201a protrudes outward from the tapered surface 82d, and the peripheral portion of the center hole Da of the disk D is The clamping posture is such that it can be clamped between the table portion 82b and the holding claw 201a.

  As shown in FIGS. 5 and 6, a spring support projection 82g extending downward in parallel with the support shaft 82g is integrally formed in the convex portion 82c of the rotating member 82. The spring support protrusions 82g are provided at three locations, and torsion springs 202, which are spring members that urge the clamp members, are supported by the respective spring support protrusions 82g. Each clamp member 201 is always urged clockwise by the torsion spring 202 (in the direction of the clamp posture).

  As shown in FIG. 4, the lower surface of the holding claw 201a is formed with an inclined portion 201c that moves away from the table portion 82b as the distance from the rotation shaft 82a increases. When the holding claw 201a rotates to the clamping posture, the peripheral portion of the center hole of the disk D is sandwiched between the inclined portion 201c of the holding claw 201a receiving the urging force of the torsion spring 202 and the table portion 82b. .

  The rotation range of each clamp member 201 in the clockwise direction is limited when the clamp member 201 hits the inner wall portion on the clockwise side of the notch portion 82e. The clamp member 201 in a clamp posture that clamps the peripheral edge of the center hole of the disk D is a posture rotated slightly counterclockwise from the limit position where it hits the inner wall portion. In FIG. 6 and FIG. 12, the reference line of the clamp posture connecting the contact point between the clamp member 201 in the clamp posture and the disk and the rotation center of the clamp member 201 (the center of the support shaft 82f) is indicated by Oc. Yes. With respect to the radial reference line Or connecting the center of the rotation shaft 82a and the center of the support shaft 82f, the reference line Oc extends in a direction rotated counterclockwise.

  As shown in FIGS. 3 and 4, in the clamp mechanism 200, a switching rotation unit 203 is provided below the table unit 82b. The switching rotation portion 203 is supported so that it can rotate independently of the rotation shaft 82a and the table portion 82b around the rotation shaft 82a. As shown in FIGS. 5 to 7, tooth portions 203 a are formed on the outer periphery of the switching rotation portion 203 so as to protrude continuously at a constant pitch in the circumferential direction.

  FIG. 7 shows a state where one of the three clamp members 201 is removed. Clamp cams 203b are formed at three locations on the upper surface of the switching rotation portion 203. The clamp cam 203b is a cam groove, and the locus of the cam groove has a shape that approaches the rotating shaft 82a as it goes clockwise. Sliding projections (not shown) project from the lower surfaces of the respective clamp members 201, and these sliding projections are slidably inserted into the clamp cam 203b.

  The clamp mechanism 200 rotates each clamp member 201 clockwise by the biasing force of the torsion spring 202 in a free state where no external force is applied to the table portion 82b and no external force is applied to the switching rotation portion 203. The rotating force acts on the clamp cam 203b, and the switching rotation portion 203 is rotated clockwise with respect to the table portion 82b. Then, each holding claw 201a has a clamping posture in which it protrudes outward from the tapered surface 82d of the convex portion 82c. Conversely, when the rotation member 82 is restrained and the switching rotation portion 203 is forcibly rotated counterclockwise, the clamp member 201 is rotated counterclockwise by the clamp cam 203b, and the holding claw 201a is tapered. Retreat inward from the surface 82d and switch to the non-clamping posture.

  As shown in FIGS. 2, 5, 6, and 7, a clamp switching unit 210 is provided on the drive base 81 of the drive unit 14. The clamp switching unit 210 includes a clamp switching member 211 provided on the drive base 81, a switching rotation unit 203, and a lock member 215 shown in FIGS.

  As shown in FIG. 2, the clamp switching member 211 is made of a sheet metal material and has a cross-section bent into an L shape, and is supported so as to reciprocate along the side surface 81 a of the drive base 81. As shown by a broken line in FIG. 2, when the drive base 81 is at the intervention position, the clamp switching member 211 is moved along the side surface 81a by the driving force of the first power transmission unit 12 shown in FIG.

  The clamp switching member 211 is provided with a switching portion 213 on the rotating member 82 side. The switching portion 213 is made of a flat plate material. The switching portion 213 is formed with a constraining tooth portion 213a in which a plurality of teeth protrude at an equal pitch, and the constraining tooth portion 213a is formed in the tooth portion 203a formed in the switching rotation portion 203 as shown in FIG. It is possible to mesh with.

  As shown in FIGS. 3 and 4, a lock tooth portion 82 h is integrally formed on the lower surface of the table portion 82 b that is a part of the rotating member 82. The lock teeth 82h are formed with teeth protruding at a constant pitch in the circumferential direction. The lock member 215 is provided on the upper surface of the drive base 81. The lock member 215 is made of a leaf spring material, and a lock piece 215 a is bent at the tip of the lock member 215. As shown in FIG. 3, the lock piece 215a of the lock member 215 can mesh with the lock tooth portion 82h.

  As shown in FIG. 6, when the clamp switching member 211 is moving toward the tip end surface 81 b side (the right side in FIG. 6) of the drive base 81, the restraining tooth portion 213 a of the clamp switching member 211 is switched to the switching rotation portion 203. Of the tooth portion 203a. Further, as shown in FIG. 4, the tip of the switching portion 213 rides on the lock member 215, the lock member 215 is pushed down by the switching portion 213, the lock piece 215a moves away from the lock tooth portion 82h, and the table portion 82b is unlocked. At this time, both the rotating member 82 and the switching rotating portion 203 are in a free state, and the holding claw 201a of the clamp member 201 protrudes around the convex portion 82c by the force of the torsion spring 202 and assumes a clamping posture.

  When the clamp switching member 211 moves from the clamped state in FIG. 6 to the rotation fulcrum side of the drive base 81 (the left side in FIG. 6), the tip of the switching unit 213 is disengaged from the lock member 215 in the first stroke. The lock piece 215a is fitted to the lock tooth portion 82h by the elastic force of the member 215, and the rotation member 82 is locked so as not to rotate. Further, when the clamp switching member 211 moves leftward to the position shown in FIG. 5, the restraining tooth portion 213a of the clamp switching member 211 is engaged with the tooth portion 203a of the switching rotating portion 203, and the restraining tooth portion 213a moves to the left in the figure. The switching rotator 203 is rotated counterclockwise by the moving force. The clamping member 201 is rotated counterclockwise by the rotational force of the switching rotating portion 203, and the holding claw 201a is retracted into the convex portion 82c to be in the non-clamping posture.

  As shown in FIGS. 1 and 2, the drive base 81 is provided with an optical head 83, and the optical head 83 is guided by a pair of guide members (not shown) arranged in parallel with each other. An objective lens 83 a is provided on the upper surface of the optical head 83. The drive base 81 is provided with a sled mechanism, and this sled mechanism is driven by a sled motor so that the optical head 83 approaches the rotating member 82 (a position facing the inner peripheral side of the disk D) from the rotating member. It is moved in a direction away from 82 (the outer peripheral direction of the disk D). At this time, the objective lens 83 a moves in the radial direction while facing the recording surface of the disk D clamped by the rotating member 82, and the data recorded on the disk D is recorded by the optical device provided in the optical head 83. The data is read or data is recorded on the disk D.

  As shown in FIGS. 8 and 9, a transfer unit 17 is provided under the mechanism base 15. As shown in FIG. 10, the transfer unit 17 has a metal unit frame 100 that is elongated in the illustrated X1-X2 direction. The unit frame 100 has an upper surface 101, a lower surface 102, a side surface 103 on the X1 side, and a side surface on the X2 side, and the inside of the unit frame 100 penetrates in the Y1-Y2 direction shown in the drawing. Inside the unit frame 100, a sliding member 105 made of a synthetic resin having a low friction coefficient is provided. The sliding member 105 includes a holding portion 106 extending along the inner surface of the upper surface 101 of the unit frame 100, a side guide portion 107 positioned inside the side surface 103 on the X1 side, and a side positioned inside the side surface on the X2 side. And a section guide section.

  In the transfer unit 17, a roller shaft 111 is provided in the unit frame 100. The roller shaft 111 extends parallel to the upper surface 101 of the unit frame 100, and both ends thereof are rotatably supported by the side surface 103 on the X1 side and the side surface on the X2 end side. A first transfer roller 112 and a second transfer roller 113 (not shown) made of a material having a high friction coefficient such as synthetic rubber or natural rubber are provided on the outer periphery of the roller shaft 111. The transfer rollers 112 and 113 are spaced apart in the axial direction.

  The roller shaft 111 is urged by a spring toward the clamping unit 106, and the transfer rollers 112 and 113 and the clamping unit 106 are elastically pressed against each other. The disk D can be elastically clamped by the transfer roller 112 and the clamping unit 106, and the transfer roller 113 and the clamping unit 106.

  As shown in FIGS. 1 and 10, the fulcrum shaft 131 serving as the pivot fulcrum of the transfer unit 17 is fixed on the bottom surface 6 of the lower housing 3 so as to extend vertically upward. The transfer unit 17 is provided with a bearing portion 125 extending in a direction orthogonal to the roller shaft 111 at an end portion on the X1 side in the drawing, and the bearing portion 125 is rotatably supported by the fulcrum shaft 131.

  As shown in FIGS. 8 and 9, in the second power transmission unit 16, the switching member 91 is moved in the (d)-(e) direction by the power of the motor. In FIG. 8, the switching member 91 is moving in the (d) direction, and the moving unit 17 is in a standby position approaching the inside of the front surface 7 of the housing. As shown in FIG. 9, when the switching member 91 is moved in the direction (e), the transfer unit 17 is rotated counterclockwise about the fulcrum shaft 131 by the moving force of the switching member 91. 9 is reached.

  As shown in FIGS. 2 and 10, a worm gear 141 is rotatably supported on a fulcrum shaft 131 extending vertically from the bottom surface 6 of the housing, and an integrated gear 147 is freely rotatable under the unit frame 100 of the transfer unit 17. It is supported by. The integral gear 147 is an integral of a spur gear 147a and a worm wheel 147b. The worm gear 141 meshes with the worm wheel 147b, and the rotational force of the transfer motor provided on the bottom surface 6 of the housing is influenced by the worm gear 141. To the integrated gear 147.

  As shown in FIG. 10, a gear 146 is supported on the side surface 103 of the unit frame 101, and a pinion gear 144 is fixed to the roller shaft 111. The gear 146 meshes with both the pinion gear 144 and the spur gear 147a. With this power transmission mechanism, the roller shaft 111 can be rotated by a transfer motor provided on the bottom surface 6 of the housing.

  While the transfer unit 17 pivots counterclockwise from the standby position shown in FIG. 8 with the support shaft 131 as a fulcrum to reach the transfer operation position shown in FIG. 9, the transfer rollers 112 and 113 continue to rotate and are inserted. The disc D inserted from the opening 23 is conveyed toward the support 21 at the selected position by the rotation force of the transfer rollers 112 and 113 and the rotational force of the transfer unit 17.

Next, the disk loading operation and the disk clamping operation of the disk device 1 will be described.
FIG. 11 is a flowchart showing the disc clamping operation, and FIG. 12 is an enlarged plan view showing a state where the center hole Da of the disc D is held by the clamp member rotating to the clamping posture. In the flowchart of FIG. 11, the processing step of each control operation is indicated by a symbol “S”.

  When the operation unit designates the support 21 on which the disk D is to be loaded, the drive unit 14 moves to the retracted position as shown by the solid line in FIG. 2, and the transfer unit 17 waits as shown in FIG. The support body selection means 22 is started in the state moved to the position. By the operation of the support body selection means 22, the plurality of support bodies 21 move up and down within the disk storage area, and the designated support body 21 is moved to the selected position and stopped. The designated support body 21 is located at the same height as the insertion port 23.

  When the designated support body 21 stops at the selected position, the first power transmission unit 12 is driven, and the drive unit 14 rotates to the intervention position indicated by the broken line in FIG. 2 and stops.

  At this time, as shown in FIG. 3, the lock piece 215a of the lock member 215 is fitted to the lock tooth portion 82h on the lower surface of the table portion 82b, and the rotation member 82 is locked so as not to rotate. The switching rotating portion 203 is rotated counterclockwise by the restraining tooth portion 213a. The clamping member 201 is rotated counterclockwise by the rotational force of the switching rotation portion 203, and the holding claw 201a is retracted into the convex portion 82c to be in an unclamping posture.

  When the disk D is inserted from the insertion port 23, the roller shaft 111 is rotated by the transfer motor, and the first transfer roller 112 and the second transfer roller 113 rotate in the disk loading direction. The disc D inserted from the insertion port 23 is sandwiched between the transfer rollers 112 and 113 and the sandwiching unit 106 and is carried toward the inside of the housing 2. When the disk D is carried by the transfer rollers 112 and 113 by a predetermined distance, the transfer unit 17 is rotated from the standby position shown in FIG. 8 to the transfer operation position shown in FIG. 9, and the disk D stops at the selected position. Is supplied to the lower surface of the supporting member 21.

  It is possible to hold the loaded disk D on the support 21 in the selected position and store it in the disk storage area 20 inside the housing 2 as it is. However, the loaded disk D is loaded under the support 21. Immediately after that, the rotating member 82 can be clamped.

The clamping operation at that time is performed based on the operation flow shown in FIG.
In the disc clamping operation of S1, the transfer unit 17 stops at the transfer operation position shown in FIG. 9, the rotation of the roller shaft 111 also stops, and the disc D is held between the transfer rollers 112 and 113 and the holding unit 106 and stopped. is doing.

  The lock member 54 shown in FIG. 1 moves in the X1 direction while the disk D is supplied to the lower surface of the support 21 at the selected position and is held between the transfer rollers 112 and 113 and the holding unit 106 and stopped. The lock member 61 provided on the Y1 side is also moved in the X1 direction. The restraint shaft 77 is lifted by the lift portion 56b of the lock control hole 56 provided in the lock member 54, and the restraint shafts 78, 78 are lifted by the lift portion of the lock control hole provided in the lock member 61, so that the unit support base 13 is lifted. At this time, the drive unit 14 at the intervention position indicated by the broken line in FIG. 2 is lifted together with the unit support base 13, and the convex portion 82c of the rotating member 82 is located on the lower surface of the support 21 at the selected position. Into the center hole Da.

  Further, by the power of the first power transmission unit 12, the clamp switching member 211 is moved to the right side of the figure as shown in FIG. 6, and the restraining tooth portion 213a is disengaged from the tooth portion 203a of the switching rotating portion 203. As shown in FIG. 4, the tip of the switching portion 213 rides on the lock member 215, the lock piece 215a is separated from the lock tooth portion 82h, and the lock of the table portion 82b is released. As a result, both the rotating member 82 and the switching rotating portion 203 are in a free state, and the holding claw 201a of the clamp member 201 protrudes around the convex portion 82c by the force of the torsion spring 202 and assumes a clamping posture.

  In S2 of FIG. 11, when it is detected by a clamp operation end switch SWa (not shown) that the clamp switching member 211 has moved to the position shown in FIG. 6, the control unit determines that the clamp operation of the disk D has been completed.

  In the normal clamping completion state, as shown in FIG. 12, the clamping member 201 is urged to rotate clockwise (α direction) about the support shaft 82f by the elastic force of the torsion spring 202, and the lower surface of the clamping member 201 is The peripheral edge of the center hole Da of the disk D is sandwiched between the inclined portion 201c and the table portion 82b.

  The normal rotation direction of the disk D in the reproduction operation or the data recording area search operation is the clockwise direction (β1 direction) shown in FIG. However, in the processing operation shown in FIG. 11, if it is determined in S2 that the clamping of the disk D has been completed, the process proceeds to S3, and the spindle motor Ms rotates in the counterclockwise direction (β2 direction) which is the reverse rotation direction to the normal rotation direction. Driven. At this time, the support shaft 82f provided on the rotating member 82 tries to move in the β2 direction, but frictional resistance acts between the inclined portion 201c of the clamp member 201 and the disk D held by the transfer unit 17. Therefore, a clockwise turning force (α direction) about the support shaft 82f acts on the clamp member 201. By this turning force, the inclined portion 201c of the clamp member 201 is further pressed into contact with the peripheral edge of the center hole Da of the disc D, and the clamping force of the disc D is increased.

  Therefore, the clamping operation is completed while the disk D is slightly lifted from the table portion 82b, or the clamping operation is completed while the clamping member 201 is not completely rotated in the α direction due to friction or the like. Even so, the disk D can be securely clamped between the inclined portion 201c of the clamp member 201 and the table portion 82b by the reverse drive of S3.

  Since the disk D is held between the transfer rollers 112 and 113 and the holding unit 106 and stopped, if the disk D is normally loaded on the rotating member 82, the spindle motor Ms is rotated in the β2 direction in S3. When this is done, the clamping force is increased and the rotating member 82 should not be able to rotate. Therefore, in S4 of FIG. 11, it is determined whether or not the rotating member 82 rotates. This determination is performed by monitoring a rotation detection pulse obtained from a rotation detection unit provided in the spindle motor Ms, or monitoring an increase state of a current value supplied to the spindle motor Ms.

  In S4, when it is determined that the rotating member 82 has rotated when the spindle motor Ms is driven in the β2 direction, it is determined that the clamping state is incomplete, and the process proceeds to S5 to perform the clamping operation again. That is, the clamp member 201 is returned to the non-clamping posture shown in FIG. 5, and then the clamping member 201 is returned to the clamping posture as shown in FIG. 6, and the process proceeds to S3. Even if the clamping operation is repeated a predetermined number of times, if the rotating member 82 rotates in S4, it is determined that the disk is defective and the disk is ejected to the insertion slot 23.

  In S4, when the spindle motor Ms is driven in the β2 direction and it can be determined that the state in which the rotating member 82 has not rotated continues for a predetermined time in S6, it is determined in S7 that the clamped state is normal.

  At this time, while rotating the roller shaft 111 in the transfer unit 17 in the disk loading direction, the transfer unit 17 is returned to the standby position shown in FIG. 8 and the restriction of the disk D by the transfer rollers 112 and 113 is released. Further, the lock member 54 shown in FIG. 1 and the lock member 61 shown in FIG. 2 are moved in the X1 direction to guide the restraint shafts 77 and 78, 78 to the escape portion 56c of the lock control hole 56, so that the unit support base 13 Is in an elastically supported state by the dampers 71, 72, 73.

  Then, the process proceeds to S8, the driving direction of the spindle motor Ms is reversed, the rotating member 82 is rotated in the β1 direction, and a normal rotating operation is performed. In this normal rotation operation, a reading operation and a recording operation by the optical head 83 are performed.

  In S3, the peripheral portion of the center hole Da of the disc D is firmly held by the inclined portion 201c of the clamp member 201 and the table portion 82b by applying a driving force in the β2 direction to the rotating member 82. The disk clamp is less likely to loosen during the rotating operation. Further, when data is read or recorded by a normal rotation operation, or when a search operation or the like is performed by rotating the disc in the β1 direction at a higher speed than during reproduction, the rotation member 82 is mainly at a constant speed. Rotation and the acceleration in the β1 direction does not act much on the rotating member 82. Therefore, a large rotational force in the direction opposite to the α direction does not act on the clamp member 201, and the disk clamp is hardly loosened.

  On the other hand, when the reproduction operation is stopped, or when the search of the target data is completed and the search operation is stopped or decelerated, the spindle motor Ms is braked, so that an acceleration in the β2 direction is generated in the rotating member 82. . At this time, since the disk D having a predetermined mass tries to continue to rotate in the β1 direction by inertial force, a rotational force in the α direction is given to the clamp member 201 relatively. Since this rotation direction is a direction to increase the clamping force, when the rotation is stopped or decelerated, the clamping force of the disk is not loosened, but rather the clamping force is increased.

  That is, the normal rotation direction (β1 direction) is set to the same direction as the rotation biasing direction (α direction) given from the torsion spring 202 to the clamp member 201, and when the disk is started, the transfer is performed in S3 shown in FIG. With the disk held by the unit 17, the rotating member 82 is rotated in the β2 direction opposite to the normal rotating direction to increase the clamping force, and then the rotating member 82 is shifted to the normal rotation in the β1 direction. Thus, the clamping force of the clamping member 201 can be maintained in a strong state at all times from the start of the disk until the subsequent deceleration or stop.

  Also, when the disk D is clamped on the rotating member 82 and the normal rotation operation is stopped and then the rotation is stopped and then the normal rotation operation is resumed, the rotation member 82 is moved in the β2 direction only for a short time. It is preferable to shift to normal rotation in the β1 direction after rotation. In this case, even when the disk D is not held by the transfer unit 17, when the rotating member 82 is rotated in the β2 direction for a short time, the disk D is about to stop by inertial force. It is possible to increase the clamping force by applying a rotational force in the direction.

1 is an exploded perspective view showing the overall structure of a disk device according to an embodiment of the present invention; FIG. 1 is a plan view mainly showing a lower housing part of the disk device of FIG. 1; It is a side view of the rotating member and the spindle motor and the clamp switching means, a diagram showing a disk non-clamping state, It is a side view of the rotating member, spindle motor and clamp switching means, a diagram showing a disk clamp state, The top view which shows the structure of a clamp switching means according to operation, The top view which shows the structure of a clamp switching means according to operation, A partially enlarged view of the structure of the clamp switching means, The top view which shows the structure of a 2nd power transmission part according to operation | movement, The top view which shows the structure of a 2nd power transmission part according to operation | movement, An exploded perspective view showing the structure of the rotation fulcrum of the transfer unit, showing the third power transmission unit, A flowchart showing the disc clamping operation; An enlarged plan view showing a state in which the disc is clamped by rotating the clamp member to the clamp posture,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc apparatus 20 Disc storage area 21 Support body 23 Insertion port 14 Drive unit 17 Transfer unit 81 Drive base 82 Rotating member 82a Rotating shaft 82b Table portion 82c Protruding portion 82f Support shaft 112 First transfer roller 113 Second transfer roller 200 Clamp mechanism 201 Clamp member 201c Inclined portion 202 Torsion spring Ms Spindle motor

Claims (5)

In a disk device having a rotating member that is rotationally driven by a motor, and a head that faces the disk clamped by the rotating member,
A table part on which the disk is placed on the rotating member, a clamp member that is rotatably supported inside a center hole of the disk placed on the table part, and each clamp member is placed in the center hole of the disk A spring member that is urged to rotate in a direction in pressure contact with the peripheral edge of the
A clamp switching member is provided for rotating the clamp member in a direction away from the peripheral edge of the center hole when the disc is installed on the rotating member and when the disc is detached from the rotating member;
After the disc is installed on the rotating member and the clamp member is pressed against the peripheral edge of the center hole, the rotating member is applied with a rotational force in the direction opposite to the rotational biasing direction applied from the spring member to the clamp member. And the rotation direction of the motor is controlled so that the rotation direction is reversed and then the normal rotation operation is performed.   The disk device according to claim 1, wherein the clamp member has an inclined portion at a portion facing the table portion, and an inner peripheral edge of the disk is sandwiched between the table portion and the inclined portion.   When stopping the rotation of the disk, the rotating member performing a normal rotating operation is decelerated, and the rotating member is rotated in the direction opposite to the rotating biasing direction applied from the spring member to the clamp member. 3. The disk device according to claim 1, wherein acceleration is given.   A conveying member for conveying the disk toward the rotating member is provided. After the disk is installed on the rotating member and the clamp member is pressed against the peripheral edge of the center hole, the conveying member holds the disk. 4. The rotating force in the direction opposite to the rotation biasing direction is applied to the rotating member, and then the conveying member is moved away from the disk to shift to a normal rotating operation. Disk unit.   If the rotating member does not rotate when a rotational force in the direction opposite to the rotation biasing direction is applied to the rotating member, it is determined that the center hole of the disc is normally held by the clamp member. Item 5. The disk device according to Item 4.

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