JP4006759B2 - Chucking mechanism for disk recording medium and disk drive apparatus using the mechanism - Google Patents

Description

  The present invention relates to a chucking mechanism for holding a disk recording medium having a central circular hole such as a compact disk (CD) or a digital versatile disk (DVD) on a disk support surface of a turntable of a disk drive device. The present invention also relates to a disk drive device using such a chucking mechanism.

  CDs, DVDs, and the like are removable disk recording media that are used by being mounted on a turntable of a disk drive device, and for mounting the disk recording media, a circular hole is provided in the center thereof. On the other hand, the turntable of the disk drive device has a disk support surface and a holding mechanism for holding the loaded disk recording medium on the disk support surface.

  Among disk drive devices compatible with CDs and DVDs, in particular, disk drive devices mounted on portable CD players, DVD players, notebook computers, etc. are most likely to be thin. There is a need, and much effort has been made to reduce the thickness of the device, even a fraction of a millimeter. The main factors that determine the thickness of the disk drive device are the thickness of the drive motor for rotating the disk recording medium and the thickness of the holding mechanism for holding the disk recording medium on the turntable.

  There are various types of such holding mechanisms, but the most desirable type from the viewpoint of thinning is a chucking mechanism having a movable claw that holds a disk recording medium by pressing it onto the disk support surface of the turntable. It seems to have been provided on the turntable. An example of such a conventional chucking mechanism is shown in FIGS.

  In FIG. 6, a turntable 62 is connected to the output shaft of a flat disk-shaped spindle motor 60, and the center of the upper surface of the turntable 62 is fitted in the central circular hole of a disc recording medium such as a CD. A block 64 is provided. The central block 64 is formed as a flat disk-shaped cap-like member, is disposed concentrically with the rotational axis of the turntable 62, and is fixedly assembled to the turntable 62. The outer diameter dimension of the central block 64 is matched with the inner diameter of the central circular hole 14 (see FIG. 8) of the disk recording medium 16, and the disk recording medium to be mounted is the center axis of the turntable 62 by the central block 64. Is aligned with respect to. Further, three engaging claws 66 are provided on the turntable 62 so as to protrude from the outer peripheral surface of the central block 64 in the radial direction, that is, to be movable in a substantially radial direction.

  FIG. 7 is a perspective view showing the center block 64 shown in FIG. 6 upside down. Three sliding members 68 are incorporated in the central block 64, and the sliding members 68 are supported by the central block 64 so as to be slidable in the radial direction. It is biased radially outward. The engaging claw 66 described above is formed at the radially outer end of the sliding member 68, and the engaging claw 66 has a diameter from the outer peripheral surface of the central block 64 by sliding in the radial direction. Infest in the direction.

  FIG. 8 is an enlarged view of the engaging claw 66 shown in FIG. 6 and FIG. 7, and as shown in the figure, the engaging claw 66 has a first engaging surface 72 obliquely upward at its tip, A second engaging surface 74 that is inclined downward. When the user mounts the disk recording medium 16 on the turntable 62, the user holds the disk recording medium 16 and fits the central block 64 of the turntable 12 into the central circular hole 14 of the disk recording medium 16. In this way, it is pressed against the turntable 62. Then, the edge portion of the central circular hole 14 on the lower surface side of the disk recording medium 16 engages and presses the diagonally upward first engagement surface 72 of the engagement claw 66, so that the user engages the engagement claw. 66 can be pushed radially inward against the biasing force of the coil spring 70.

  Further, when the disk recording medium 16 is pressed downward and the lower surface of the disk recording medium 16 is brought into contact with the upper surface of the turntable 62, the pointed portion of the engagement claw 66 has a central circular shape of the disk recording medium 16. In order to escape upward from the hole 14, the diagonally downward second engaging surface 74 of the engaging claw 66 engages with the edge of the central circular hole 14 on the upper surface side of the disk recording medium 16, and thereby the engaging claw 66 holds the disk recording medium 16 on the turntable 62. FIG. 8 shows the state at this time. As can be seen from the figure, the thickness of the engaging claw 66 is about three times the thickness of the disc recording medium 16 to be mounted. This is because the surface 72 and the second engagement surface 74 are formed side by side. In this conventional chucking mechanism, the thickness cannot be made equal to or less than the thickness of the engaging claw 66.

Other conventional chucking mechanisms include those described in, for example, Japanese Patent Laid-Open No. 2000-182305, but the chucking mechanism of the same publication must be thicker than the above-described chucking mechanism. .
JP 2000-182305 A

  The chucking mechanism described above with reference to FIGS. 6 to 8 is probably the thinnest mechanism among the conventional mechanisms for holding the removable disk recording medium on the disk support surface of the turntable. However, it still has a thickness of about three times the thickness of the disk recording medium. Among devices equipped with a disk drive device that drives a removable disk recording medium, the thickness of the device can be reduced even by 1 mm, such as portable CD players, DVD players, and notebook computers. There are many things that are directly related to the improvement of the commercial value, and considering this, it is clear that it is strongly desired to make such a chucking mechanism thinner.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to improve a chucking mechanism for holding a disk recording medium having a central circular hole on a disk support surface of a turntable. The chucking mechanism can be made thinner. A further object of the present invention is to provide a disk drive device using such a chucking mechanism.

In order to achieve this object, a chucking mechanism according to the present invention is a chucking mechanism for holding a disk recording medium having a central circular hole on a disk support surface of a turntable. A central block provided concentrically with the rotary shaft of the turntable and fitted in a central circular hole of the disk recording medium, and a rotary shaft of the turntable at each of a plurality of locations spaced in the circumferential direction of the central block Is provided so as to be movable in the radial direction with respect to the rotation axis of the turntable and is urged radially outward with respect to the rotation shaft of the turntable, and when the disc recording medium is mounted on the disc support surface, A plurality of first engaging claws engaged with the edge of the circular hole and pushed radially inward with respect to the rotation axis of the turntable; The first engagement claw is provided at a plurality of locations spaced apart in the circumferential direction at different locations from each other so as to be movable in the radial direction with respect to the rotation axis of the turntable. When the engaging claw is pushed inward in the radial direction, it is urged radially outward with respect to the rotating shaft of the turntable in conjunction with the first engaging claw, and is attached to the disk support surface. A plurality of second engaging claws that engage with the edge of the central circular hole of the disk recording medium and hold the disk recording medium on the disk support surface of the turntable .
Further, the disk drive device according to the present invention is a disk drive device provided with a chucking mechanism for holding a disk recording medium having a central circular hole on the disk support surface of the turntable. A central block that is provided concentrically with the rotation axis of the turntable in the center of the turntable and fits into a central circular hole of the disk recording medium, and a plurality of locations spaced in the circumferential direction of the central block. Provided to be movable in the radial direction with respect to the rotation axis of the turntable, biased radially outward with respect to the rotation axis of the turntable, and when mounting the disk recording medium on the disk support surface, Engage with the edge of the central circular hole of the disk recording medium and push radially inward with respect to the rotation axis of the turntable A plurality of first engaging claws and a plurality of places spaced apart in the circumferential direction of the central block at different positions from the place where the first engaging claws are provided with respect to the rotation axis of the turntable It is provided so as to be movable in the radial direction, and when the first engagement claw is pushed inward in the radial direction, it moves radially outward with respect to the rotation axis of the turntable in conjunction with the first engagement claw. A plurality of second members that are biased and engage with the edge of the central circular hole of the disk recording medium mounted on the disk support surface to hold the disk recording medium on the disk support surface of the turntable. It has a fingernail .

  According to the present invention, the chucking mechanism for holding the disk recording medium having the central circular hole on the disk support surface of the turntable can be configured to be extremely thin, and thus the disk drive device can be configured to be very thin. be able to.

  Embodiments of the present invention will be described below. FIG. 1 is a perspective view of a turntable having a chucking mechanism according to an embodiment of the present invention for holding a disk recording medium having a central circular hole on a disk support surface of the turntable. FIGS. 1 is a cross-sectional view showing the central block, the first engaging claw, and the second engaging claw shown in FIG. 1 together with a disk recording medium, and FIG. 3 is a perspective view showing the inside of the central block shown in FIG. 4 is a perspective view showing the swinging member incorporated in the central block of FIG. 3, and FIGS. 5A to 5C show the state of the swinging member corresponding to the states of FIGS. 2A to 2C, respectively. FIG.

  FIG. 1 is a perspective view showing a turntable 12 having a chucking mechanism 10 according to an embodiment of the present invention for holding a disk recording medium having a central circular hole on a disk support surface of the turntable. It is. The illustrated chucking mechanism 10 and turntable 12 are used for a disk drive device that drives a compact disk (CD). However, the application of the chucking mechanism according to the present invention is not limited to a CD disk drive device, and has a central circular hole, and an engaging claw is engaged with the edge of the central circular hole to Any disk recording medium can be used as long as it is a disk recording medium that can be held on a disk support surface. Examples of such a disk recording medium include a digital versatile disk ( DVD).

  As shown in FIG. 1, the chucking mechanism 10 is provided on the turntable 12 of the disk drive device. The disk drive device includes a flat disk-shaped spindle motor (not shown) for rotationally driving the turntable 12, and the turntable 12 is fixedly connected to an output shaft of the spindle motor and driven. The spindle motor is almost entirely housed in the turntable 12, and a unit comprising the spindle motor and the turntable 12 is assembled to the disk drive device.

  In FIG. 1, the rotation axis of the turntable 12 is indicated by a one-dot chain line AX. In the following description, when a direction is indicated, the direction is expressed with reference to the rotational axis AX of the turntable 12 unless otherwise specified. Therefore, simply referring to the “radial direction” means the radial direction with respect to the rotational axis AX. Further, the actual direction of the turntable 12 is not necessarily the direction shown in FIG. 1, but for convenience of explanation, in the following explanation, the upper and lower parts in FIG. 1 are referred to as the upper and lower parts of the turntable 12. And Accordingly, FIG. 1 is a perspective view of the turntable 12 as viewed obliquely from above. In addition, the upper and lower parts of other components are also adjusted in this direction.

  The turntable 12 is provided with an annular disk support surface 18 at the peripheral edge of the upper surface thereof. The disk support surface 18 is a disk recording medium 16 having a central circular hole 14 (see FIGS. 2 to 4). The disk recording medium 16 is supported by abutting against the peripheral portion of the central circular hole 14 on the lower surface side.

  At the center of the upper surface of the turntable 12, a central block 20 that fits into the central circular hole of the disk recording medium is provided. The central block 20 is formed as a flat disk-shaped cap-shaped member, is disposed concentrically with the rotational axis AX of the turntable 12, and is fixedly assembled to the turntable 12. The outer diameter dimension of the central block 20 is matched with the inner diameter of the central circular hole 14 of the disc recording medium 16, and the disc recording medium to be mounted is positioned with respect to the rotational axis AX of the turntable 12 by the central block 20. Are matched. The thickness of the central block 20 is substantially equal to the thickness of the disc recording medium to be mounted, and is only slightly thicker (see FIGS. 2 to 4).

  In the turntable 12, three first engaging claws 22 and three second engaging claws 24 protrude in and out from the outer peripheral surface of the central block 20 in the radial direction, that is, approximately in the radial direction. It is provided to be movable. The first and second engaging claws 22 and 24 are alternately arranged at the peripheral edge of the central block 20 at an angular interval of 60 degrees, and thus are provided at an equal angular interval.

  The first engaging claw 22 and the second engaging claw 24 have their tips (radially outer ends) projecting radially outward from the outer periphery of the central block 20 and are formed in the central circular hole of the disk recording medium. Engageable with the edge. However, when the disc recording medium is not mounted on the turntable 12, the first engagement claw 22 is urged radially outward to protrude a predetermined amount from the outer periphery of the central block 20, whereas the second The engaging claw 24 is accommodated inside the outer periphery of the central block 20. When the user tries to mount the disk recording medium on the disk support surface 18 of the turntable 12, the first engagement claw 22 is operated by engaging with the edge of the central circular hole of the disk recording medium. On the other hand, when the first engagement claw 22 is operated, the second engagement claw 24 is urged radially outward in conjunction with the first engagement claw 22 and is attached to the disc support surface 18 of the turntable 12. By engaging with the edge of the central circular hole of the disk recording medium, the disk recording medium is pressed and held on the disk support surface 18 of the turntable 12.

  Regarding the operation of the first engagement claw 22 and the second engagement claw 24, the central block 20, the first engagement claw 22, the second engagement claw 24, and the disc recording medium 16 shown in FIGS. This will be described with reference to a cross-sectional view. FIG. 2A shows a state before the disk recording medium 16 is mounted on the turntable 12, and the tip of the first engagement claw 22 protrudes radially outward from the outer periphery of the central block 20. The tips of the claws 24 are accommodated inside the outer periphery of the central block 20. FIG. 2B shows a state immediately before the disk recording medium 16 is seated on the disk support surface 18 of the turntable 12. The first engagement claw 22 is pushed into the central block 20, and the front end of the first engagement claw 22 and The tip end of the second engaging claw 24 is engaged with the inner peripheral surface of the central circular hole 14 of the disk recording medium 16. 2C shows a state in which the disc recording medium 16 is mounted on the disc support surface 18 and is held by the second engagement claw 24. The first engagement claw 22 is pushed into the central block 20. However, the tip of the second engagement claw 24 protrudes radially outward from the outer periphery of the central block 20, and the engagement surface 30 of the second engagement claw 24 is the center on the upper surface side of the disk recording medium 16. The edge of the circular hole 14 is engaged.

  2A to 2C, the first engaging claw 22 is always urged radially outward by an urging mechanism described later as indicated by an arrow 22a, and is also diametrically operated by a stopper mechanism described later. The limit position that can protrude outward is restricted to the position shown in FIG. 2A. On the other hand, when the first engagement claw 22 is pushed inward in the radial direction against the urging force of the urging mechanism by a later-described interlocking urging mechanism, the second engagement claw 24 has its first engagement. In conjunction with the operation of the pawl 22, it is biased outward in the radial direction.

  Further, as shown in FIG. 1 and FIGS. 2A to 2C, an engagement surface 28 is formed on the tip (radially outer end) of the first engagement claw 22 so as to face obliquely upward. The mating surface 28 engages the edge of the central circular hole 14 of the disk recording medium 16 that the user intends to mount on the disk support surface 18 of the turntable 12, thereby causing the first engagement claw 22 to move to the biasing mechanism. It is an engagement surface for generating a force that pushes inward in the radial direction against the urging force. Further, an engagement surface 30 that is inclined obliquely downward is formed at the tip (radially outer end) of the second engagement claw 24, and this engagement surface 30 is formed on the disk support surface 18 of the turntable 12. It is an engagement surface for generating a force for pressing and holding the disk recording medium 16 against the disk support surface 18 by engaging with the edge of the central circular hole 14 of the loaded disk recording medium 16.

  When the user attaches the disk recording medium 16 to the turntable 12, the user holds the disk recording medium 16 and fits the central block 20 of the turntable 12 into the central circular hole 14 of the disk recording medium 16. In this way, it is pressed against the turntable 12. Then, the edge of the central circular hole 14 on the lower surface side of the disc recording medium 16 engages with the diagonally upward engaging surface 28 of the first engaging claw 22, so that the user can use the central circular shape of the disc recording medium 16. At the edge of the hole 14, the first engaging claw 22 can be pushed inward in the radial direction against the urging force of the urging mechanism, and the state when the first engaging claw 22 is pushed in is shown. This is shown in FIG. In the state of FIG. 3, the second engagement claw 24 is urged outward in the radial direction in conjunction with the first engagement claw 22 being pushed. Since the front end is in contact with the inner peripheral surface of the central circular hole 14 of the disk recording medium 16, the second engagement claw 24 hardly protrudes from the outer periphery of the central block 20.

  If the disk recording medium 16 is further pressed downward and mounted on the disk support surface 18 of the turntable 12, the tip of the second engaging claw 24 comes out from the central circular hole 14 of the disk recording medium 16. The diagonally downward engaging surface 30 of the second engaging claw 24 engages with the edge of the central circular hole 14 on the upper surface side of the disc recording medium 16, whereby the second engaging claw 24 is engaged with the disc recording medium 16. Is held on the disk support surface 18 of the turntable 12. FIG. 2C shows the state at this time. As can be seen from FIGS. 2A to 2C, the chuck mechanism according to the present invention is very thin, and its thickness is almost the same as the thickness of the disk recording medium 16 and is slightly thicker than that.

  Next, the urging mechanism that constantly urges the first engaging claw 22 radially outward and the stopper mechanism that restricts the limit position at which the first engaging claw 22 can protrude radially outward, as mentioned above. When the second engagement claw 24 is interlocked with the first engagement claw 22 and the first engagement claw 22 is pushed inward in the radial direction against the urging force of the urging mechanism, the second A specific configuration of the interlocking biasing mechanism that biases the engaging claws 24 radially outward will be described. In the illustrated embodiment, a swing mechanism with a unique structure is used to realize a simple mechanism that combines these mechanisms. This mechanism is shown in FIGS. 4 and FIGS. 5A to 5C.

  FIG. 3 is a perspective view showing the inside of the central block 20 shown in FIG. Three swing members 32 are built in the central block 20 formed in a cap shape, and these swing members 32 are supported by the central block 20 so as to be swingable. The rotary shafts AX (see FIG. 1) are arranged at equiangular intervals at circumferentially spaced positions at equidistant positions.

  FIG. 4 is a perspective view showing one of the three swing members 32 taken out. As shown in the figure, the swinging member 32 has a central shaft support portion 34, a first engagement claw 22 connected to the central shaft support portion 34 via a first arm 36, and a center via a second arm 38. And a second engagement claw 24 connected to the shaft support portion 34. A hole 40 is formed in the central shaft support portion 34, and the swing member 32 is formed by fitting the hole 40 into a support shaft portion 42 (see FIG. 3) formed integrally with the central block 20. The central shaft support 34 is pivotally supported around a swing axis BX parallel to the rotation axis AX of the turntable 12. Moreover, the 1st engagement nail | claw 22 and the 2nd engagement nail | claw 24 are located in the mutually opposing side of the circumferential direction with respect to the rotating shaft center of a turntable on both sides of the center axis | shaft support part 34. The swing member 32 further includes a spring engagement projection 42 at the edge of the central shaft support portion 34, a first stopper projection 44 at the side of the first engagement claw 22, and a second engagement claw. A second stopper projection 46 is provided on the side portion of 24, and further, a spring projection 48 is provided at the rear end of the first engagement claw 22. The function of these projections will be described later. The swing member 32 includes the central shaft support 34, the first arm 36, the second arm 38, the first engagement claw 22, the second engagement claw 24, the spring engagement projection 42, the first stopper projection 44, the first 2 A one-piece molded product made of resin in which a stopper projection 46 and a spring projection 48 are integrally formed, and a resin having sufficient strength and elasticity is used as the resin of the material.

  The first arm 36 is sufficiently thick and substantially rigid, whereas the second arm 38 is thin and bent, and is formed as a flexible and elastic arm. The first engagement claw 22 and the second engagement claw 24 are accommodated in a radially extending slot formed in the central block 20, and in particular, a slot that accommodates the second engagement claw 24. Fulfills the function of a guide slot for guiding the second engaging claw 24 in the radial direction. Since the swinging member 32 has a form as a seesaw type lever, when the swinging member 32 swings, one of the first engaging claw 22 and the second engaging claw 24 is moved radially outward. And the other can be moved radially inward, but not only that, but since the second arm 38 is flexible, Without moving one of the first engaging claw 22 and the second engaging claw 24, only the other can be moved in the radial direction. In order to enable such only one movement, the first arm 36 is a rigid arm and the second arm 38 is a flexible arm as in the illustrated embodiment. However, at least one of the first arm 36 and the second arm 38 may be flexible. Then, the first engaging claw 22 can be moved in a substantially radial direction when the swinging member 32 swings or the first arm 36 bends. When the swing member 32 swings or the second arm 38 bends, the swing member 32 can move substantially in the radial direction.

  The spring protrusion 48 is in a state of being constantly bent with its tip abutting against a protrusion 50 (see FIG. 3) formed on the central block 20. The spring protrusion 48 is a protrusion for constantly urging the first engaging claw 22 radially outward by constantly urging the oscillating member 32 in one oscillating direction. Further, the first stopper projection 44 abuts against the inner surface of the peripheral wall portion of the central block 20, so that the first engagement claw 22 that is always urged radially outward by the spring projection 48 is radially outward. The limit position that can be projected is regulated. Further, the second stopper projection 46 is also in contact with the inner surface of the peripheral wall portion of the central block 20, thereby restricting a limit position at which the second engagement claw 24 can protrude radially outward.

  With the above configuration, the swing member 32 causes the first engagement claw 22 and the second engagement claw 24 to interlock with each other so that the second engagement is achieved when the first engagement claw 22 is pushed inward in the radial direction. The function of urging the pawl 24 outward in the radial direction is achieved.

  Further, each of the oscillating members 32 is equipped with a torsion coil spring 52 that cooperates with the oscillating member 32 (see FIG. 3, but in FIG. 3, three coil springs 52 are provided. Only one of them was shown). The torsion coil spring 52 is a spring mechanism that sets the magnitude of the urging force that urges the second engagement claw 24 radially outward when the first engagement claw 22 is pushed radially inward. It functions as. The magnitude of the urging force can also be set by appropriately designing the size and shape of the second arm 38 and appropriately determining the elastic force of the second arm 38. Therefore, the present invention can set the torsion coil spring 52. There is a possibility that the configuration may be omitted. However, the provision of the torsion coil spring 52 makes it much easier to set the urging force of the second engagement pawl 24, so it is preferable to equip this.

  The coil portion of the torsion coil spring 52 is fitted to a boss portion formed on the central shaft support portion 34 of the swing member 32, and one arm thereof is located in the radial direction of the first engagement claw 22. The other arm is engaged with the spring engaging protrusion 42. The torsion coil spring 52 is applied to the swing member 32 with a preload applied thereto, and the first engagement claw 22 and the spring engagement protrusion 42 are urged radially outward by the preload, respectively. ing. When the first engaging claw 22 is pushed inward in the radial direction and the swinging member 32 swings, the other arm of the torsion coil spring 52 moves to the radially inner end of the second engaging claw 24. By engaging, the engagement with the spring engagement protrusion 42 is released, and the second engagement claw 24 is urged radially outward.

  5A to 5C are views showing the state of the swing member 32 corresponding to the states of FIGS. 2A to 2C, respectively. FIG. 5A shows a state before the disc recording medium is mounted on the turntable, and the front end of the first engagement claw 22 protrudes radially outward from the outer periphery of the central block 20, and the second engagement claw The tip of 24 is housed inside the outer periphery of the central block 20. FIG. 5B shows a state immediately before the disc recording medium is seated on the disc support surface of the turntable, and the first engagement claw 22 is pushed into the central block 20, and at this time, the front end of the first engagement claw 22 and the first engagement claw 22 are inserted. The tip of the two engaging claws 24 is engaged with the inner peripheral surface of the central circular hole of the disk recording medium (see FIG. 2B). FIG. 5C shows a state in which the disc recording medium is mounted on the disc support surface and held by the second engagement claw 24, and the first engagement claw 22 is pushed into the central block 20. However, the tip of the second engagement claw 24 protrudes radially outward from the outer periphery of the central block 20, and at this time, the engagement surface 30 of the second engagement claw 24 is a central circular shape on the upper surface side of the disk recording medium. Engages with the edge of the hole (see FIG. 2C).

  As shown in FIGS. 2C and 5C, when the second engagement claw 24 is in a state of holding the disk recording medium 16, the other end of the torsion coil spring 52 is not the spring engagement protrusion 42 but the second engagement. Accordingly, the holding force of the disk recording medium 16 by the second engaging claw 24 is based on the elastic force of the torsion coil spring 52 and the elastic force of the second arm 38 of the swing member 32. Has been obtained. In the illustrated example, in particular, the former elastic force is made larger than the latter elastic force, and the holding force of the disk recording medium 16 by the second engaging claws 24 is determined mainly by the elastic force of the torsion coil spring 52. I have to.

1 is a perspective view of a turntable including a chucking mechanism according to an embodiment of the present invention for holding a disk recording medium having a central circular hole on a disk support surface of the turntable. FIG. 2 is a cross-sectional view showing a central block, a first engagement claw, and a second engagement claw shown in FIG. 1 together with a disk recording medium, and a view showing a state before the disk recording medium is mounted on a turntable. is there. FIG. 2 is a cross-sectional view showing a central block, a first engagement claw, and a second engagement claw shown in FIG. 1 together with a disk recording medium. FIG. 2 is a cross-sectional view showing a central block, a first engagement claw, and a second engagement claw shown in FIG. 1 together with a disk recording medium. It is the perspective view which turned over the center block shown in FIG. 1, and showed the inside. It is the perspective view which took out and showed the rocking | swiveling member incorporated in the center block of FIG. It is the figure which showed the state of the rocking | swiveling member corresponding to the state of FIG. 2A. It is the figure which showed the state of the rocking | swiveling member corresponding to the state of FIG. 2B. It is the figure which showed the state of the rocking | swiveling member corresponding to the state of FIG. 2C. It is a perspective view of the conventional chucking mechanism. It is the perspective view which turned the center block shown in FIG. 6 inside out, and showed the inside. It is sectional drawing which showed the center block and engagement claw shown in FIG. 6 with the disc recording medium.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Chucking mechanism, 12 ... Turntable, 14 ... Center circular hole of a disk recording medium, 16 ... Disk recording medium, 18 ... Disk support surface, 20 ... Center block, 22 ... First mechanism 24: second engaging claw, 28 ... first engaging claw engaging surface, 30 ... second engaging claw engaging surface, 32 ... swing member.

Claims (5)

In a chucking mechanism for holding a disk recording medium having a central circular hole on a disk support surface of a turntable,
A central block provided concentrically with the rotation axis of the turntable at the center of the turntable, and fitted in a central circular hole of the disk recording medium;
Provided in each of a plurality of locations spaced in the circumferential direction of the central block so as to be movable in the radial direction with respect to the rotation axis of the turntable, and urged radially outward with respect to the rotation axis of the turntable When the disc recording medium is mounted on the disc support surface, the disc recording medium is engaged with the edge of the central circular hole of the disc recording medium and is pushed radially inward with respect to the rotation shaft of the turntable. A first engaging claw;
Provided at a plurality of locations spaced apart in the circumferential direction of the central block at locations different from the locations at which the first engaging claws are provided, so as to be movable in the radial direction with respect to the rotation axis of the turntable, When the first engagement claw is pushed inward in the radial direction, the first engagement claw is urged radially outward with respect to the rotation shaft of the turntable in conjunction with the first engagement claw. A plurality of second engaging claws for engaging the edge of the central circular hole of the mounted disc recording medium and holding the disc recording medium on the disc support surface of the turntable;
A chucking mechanism characterized by comprising: The chucking mechanism according to claim 1, wherein the plurality of first engaging claws and the plurality of second engaging claws are alternately provided in a circumferential direction of the central block. The chucking mechanism according to claim 1, wherein the arbitrary first engaging claw and the second engaging claw interlocked with the arbitrary first engaging claw are provided adjacent to each other. The chucking mechanism according to claim 1, wherein a second engagement claw is provided on a diagonal line of an arbitrary first engagement claw in a circumferential direction of the central block. In a disk drive device having a chucking mechanism for holding a disk recording medium having a central circular hole on a disk support surface of a turntable,
The chucking mechanism is
A central block provided concentrically with the rotation axis of the turntable at the center of the turntable, and fitted in a central circular hole of the disk recording medium;
A plurality of locations spaced in the circumferential direction of the central block are provided so as to be movable in a radial direction with respect to the rotation axis of the turntable, and are urged radially outward with respect to the rotation axis of the turntable. When the disc recording medium is mounted on the disc support surface, the disc recording medium is engaged with the edge of the central circular hole of the disc recording medium and is pushed radially inward with respect to the rotation shaft of the turntable. A first engaging claw;
Provided at a plurality of locations spaced apart in the circumferential direction of the central block at locations different from the locations at which the first engagement claws are provided, so as to be movable in the radial direction with respect to the rotation axis of the turntable, When the first engagement claw is pushed inward in the radial direction, the first engagement claw is urged radially outward with respect to the rotation shaft of the turntable in conjunction with the first engagement claw. A plurality of second engaging claws for engaging the edge of the central circular hole of the mounted disc recording medium and holding the disc recording medium on the disc support surface of the turntable;
A disk drive device comprising:

Images