JP4361559B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device for recording or reproducing information (hereinafter referred to as recording / reproducing) on a disk-shaped recording medium, and more particularly to a clamp mechanism for holding a disk in the disk device.

  In a disk device, a disk-shaped recording medium (hereinafter referred to as a disk) is held and rotated, and information is recorded on and reproduced from the disk. For this reason, the disc device achieves stable recording and playback by suppressing vibrations and shocks transmitted from the outside of the device, vibrations generated by the mechanical system inside the device, or vibrations caused by surface deflection due to warping of the disc. It is important to.

  Incidentally, in recent disk devices, the number of rotations tends to increase as the capacity of the disk increases. For example, when comparing the case of rotating at the 1 × speed in the innermost zone, the rotational speed is approximately 570 rpm when using a CD (Compact Disc), whereas the rotational speed is approximately 1400 rpm when using a DVD (Digital Versatile Disc). It becomes. Further, the rotational speed is about 2100 rpm for BD (Blu-ray Disc), and the rotational speed is about 2700 rpm for HD DVD (High Definition DVD).

  As described above, the higher the number of revolutions of the disk, the more remarkable the self-excited vibration occurs. Further, it is clear that the influence of vibration becomes larger (becomes more sensitive to vibration) as the density of the disk increases, that is, the pitch of the recording track decreases.

  A general clamping mechanism has a turntable attached to a motor, and a clamper biased by a spring or a magnet in the disk rotation axis direction with respect to the turntable. These clampers and turntables are configured to clamp the disk in a clamp area near the inner edge of the disk.

  In such a general clamping mechanism, when a disc such as a CD or DVD having a diameter of 120 mm and a thickness of 1.2 mm and made of polycarbonate is sandwiched only in the clamping region, the resonance frequency is in the vicinity of 80 Hz to 100 Hz.

  With respect to such a disk device, for the purpose of correcting the warp of the disk, a disk apparatus having a central clamper and a large clamper that contact the vicinity of the inner edge and the outer periphery of the disk has been proposed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-176158 (see pages 3 to 4, see FIG. 1)

  However, in the conventional disk device, when vibration in the direction of the disk rotation axis is transmitted from the outside, the disk is violated by the resonance of the disk, and the distance between the optical head and the disk surface greatly fluctuates. There is a problem that it is not performed normally, and improvement of vibration resistance performance is an issue.

  For example, in-vehicle disk devices use a damper molded from a single material such as rubber or silicon, or an oil-filled damper that fills oil into rubber in order to suppress vibration transmitted from the outside. However, any damper requires a sufficient vibration-proof effective volume in order to obtain a sufficient damping effect at the low frequency (80 to 100 Hz) as described above. There's a problem.

  Moreover, although the technique described in Patent Document 1 can obtain the effect of suppressing the warpage of the disk, there is a problem that the moment of inertia increases because the outer diameter of the clamper is large.

  The present invention has been made to solve the above-described problems, and by shifting the resonance frequency of the disk to a higher frequency, the vibration resistance performance is improved without affecting the downsizing of the disk device. The purpose is to make it.

Disk apparatus according to the present invention, the disk, Ru includes a head portion for reading or writing information, a turntable for mounting a disk, and a rotatable clamper for holding the disk with the turntable . Clamper includes a first contact portion that contacts the clamp area of the disc, and abutting the opposite surface of the recording surface of the data area of the disk, a plurality arranged in a rotational circumferential direction of the clamper an abutment surface A second abutting portion, and a flexible spoke for connecting the first abutting portion and the second abutting portion.

  According to the present invention, it is possible to shift the resonance frequency to a higher frequency, thereby improving the vibration resistance performance without hindering the downsizing of the disk device.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a disk device 10 according to Embodiment 1 of the present invention as viewed from above. FIG. 2 is a perspective view of the playback unit 200 according to Embodiment 1 of the present invention as viewed from below. FIG. 3 is a perspective view of the reproduction unit 200 with the clamp mechanism removed.

  As shown in FIG. 1, the disk device 10 has a playback unit 200 for playing back recorded information on a disk inside a housing 100. The reproduction unit 200 has a substantially flat support base 504 (FIG. 3) that is a support for the entire reproduction unit 200. The support base 504 is provided with a plurality (three here) provided on the bottom plate of the housing 100 of the disk device 10 via a plurality (three here) damper pins 301 (FIG. 2) press-fitted into the bottom surface. It is held by an oil filled damper 302 (FIG. 2).

  A turntable 507 for placing and rotating the disk 11 is provided near the front end of the support base 504 shown in FIG. The turntable 507 is attached to the rotating shaft of the disk-type motor 512 a on the circuit board 512 provided on the support base 504, and is disposed on the support base 504.

  As shown in FIG. 2, a reading head unit 513 for reading information stored in the disk 11 is slidably attached to the lower side of the support base 504. The read head unit 513 includes a feed screw shaft 551 and a guide shaft 552 arranged from the base end portion of the support base 504 (the end portion opposite to the front end where the turntable 507 is provided) to the turntable 507. The disk 11 is supported so as to be movable in the radial direction. The support base 504 is provided with an information reading window 504d which is an opening corresponding to the moving area of the reading head unit 513.

  Here, each part will be described assuming that the direction of the rotation axis of the turntable 507 is the vertical direction, the direction from the reading head unit 513 toward the disk 11 is “upward”, and the opposite direction is “downward”. However, these are merely for convenience of description, and do not limit the orientation of the disk device 10 in the usage state.

  A support member 553 is attached at a position adjacent to the turntable 507 in the support base 504. The support member 553 is provided with a motor 554 that generates a driving force for moving the reading head unit 513 and the like, and a gear train (not shown) that transmits the driving force of the motor 554. Covered with a cover 556 as a retainer.

  As shown in FIG. 3, both sides (right back and left back in FIG. 3) of the base end portion of the support base 504 are bent vertically upward to form vertical bent pieces 504c and 504f, respectively. These vertical bent pieces 504c and 504f are provided with support shafts 504e and 504g, respectively. These support shafts 504e and 504g are coaxial with each other and serve as a rotation shaft of a clamp plate 508 described below.

  Next, a clamp mechanism that presses and holds the disk 11 on the turntable 507 in the reproduction unit 200 will be described. As shown in FIG. 1, a substantially plate-like clamp plate 508 is disposed on the upper side of the support base 504. The clamp plate 508 has a pair of vertical bent pieces 508b and 508b (the one vertical bent piece 508b is hidden in FIG. 1) facing the vertical bent pieces 504c and 504f of the support base 504, respectively. The vertical bent pieces 508b and 508b are formed with holes (not shown) that engage with the above-described support shafts 504e and 504g, whereby the clamp plate 508 can support the support shafts 504e and 504g of the support base 504. It is supported so as to be rotatable as a center.

  A clamper 610 that holds the disk 11 by pressing the disk 11 against the turntable 507 is supported at the tip of the clamp plate 508. The clamper 610 is configured to be rotatable about an axis perpendicular to the plate surface of the clamp plate 508. Further, a tension coil spring 509 (FIG. 2) is provided between the base end of the clamp plate 508 (the end on the support shafts 504e and 504g side) and the base end of the support base 504. FIG. As shown by arrow X, the clamp plate 508 is urged to swing toward the support base 504 side.

  4 and 5 are an exploded perspective view and a side sectional view showing the clamper 610, the disk 11, and the turntable 507. FIG. As shown in FIGS. 4 and 5, the clamper 610 is a disk-shaped member, and the lower surface (the surface on the disk 11 side) has a first contact portion 610 a and a second contact portion that contact the disk 11, respectively. Abutting portion 610b. Each of the first contact portion 610a and the second contact portion 610b is formed as an annular convex portion centered on the rotation center of the clamper 610 (that is, the rotation center of the disk 11).

  The formation positions of the first contact portion 610a and the second contact portion 610b of the clamper 610 will be further described.

  The first contact portion 610 a of the clamper 610 is formed at a position that contacts the clamp region 11 a of the disk 11. Here, the clamp area 11a of the disk 11 is, for example, in the case of a CD, a diameter of 26 mm to 33 mm (that is, a radius of 13 mm to 16.5 mm from the disk center). In the case of DVD, the diameter is in a range of 22 mm to 33 mm (that is, a radius of 11 mm to 16.5 mm from the center of the disc). In the case of BD, the diameter is in a range of 23.5 mm to 32.5 mm (that is, a radius of 11.75 mm to 16.25 mm from the disc center). In the case of HD DVD, the diameter is in a range of 22 mm to 33 mm (that is, a radius of 11 mm to 16.5 mm from the center of the disc).

  For example, in the case of a CD, the data area 11b of the disk 11 is in a range of 46 mm to 116 mm in diameter (that is, a range of 23 mm to 58 mm in radius from the center of the disk). In the case of DVD, the diameter is in a range of 45.2 mm to 116 mm (that is, a radius of 22.6 mm to 58 mm from the center of the disc). In the case of BD, the diameter is in a range of 44 mm to 116.2 mm (that is, a radius of 22 mm to 58.1 mm from the center of the disk). In the case of HD DVD, the diameter is in a range of 46.6 mm to 116 mm (that is, a radius of 23.3 mm to 58 mm from the disc center). The second contact portion 610b of the clamper 610 is formed at a position that contacts the opposite surface (hereinafter referred to as the front surface) of the recording surface of the data area 11b of the disk 11. Here, the recording surface refers to a surface that is actually optically recorded / reproduced at that time, even if the medium can be recorded on both sides. Needless to say, if only one side is a recordable medium, that side is the recording side.

Next, the operation of the disk device thus configured will be described.
The disk 11 is transported into the disk device 10 by a loading mechanism (not shown) and placed on the turntable 507 with the recording surface (the surface on which data is recorded) facing downward. At this time, as shown in FIG. 5, the ring-shaped convex portion 507 a formed on the upper surface of the turntable 507 is engaged with the inner side of the center hole 11 c of the disk 11 from below. Further, a ring-shaped convex portion 507b formed in the vicinity of the outer periphery of the turntable 507 comes into contact with the lower surface of the clamp area 11a of the disk 11 from below.

  Further, the clamp plate 508 (FIG. 1) that holds the clamper 610 swings toward the turntable 507 by the urging force of the tension coil spring 509, and the disk 11 is sandwiched between the clamper 610 and the turntable 507. At this time, the first contact part 610a of the clamper 610 presses the clamp area 11a of the disk 11, and the second contact part 610b presses the surface of the data area 11b of the disk 11. In this state, the turntable 507 is rotated by the disk type motor 512a, the clamper 610 and the disk 11 are also rotated together, and the reading head unit 513 reads information from the disk 11.

  At this time, even if vibration in the rotation axis direction of the disk 11 is transmitted from the outside of the disk device 10 and the disk 11 resonates, the clamper 610 presses the clamp area 11a of the disk 11 and the surface of the data area 11b. Therefore, the resonance frequency of the disk 11 can be shifted to a higher frequency.

  Thus, by shifting the resonance frequency of the disk 11 to a high frequency, a sufficient damping effect can be obtained even with a relatively small vibration-proof effective volume. Therefore, vibration resistance can be improved only by providing a compact vibration isolating means such as the damper pin 301 and the oil-filled damper 302 shown in FIG. That is, it is possible to improve the vibration resistance while realizing downsizing of the disk device.

  As described above, according to the disk device according to the first embodiment, the clamp area 11a and the data area 11b of the disk 11 are formed by the first contact portion 610a and the second contact portion 610b of the clamper 610. Since the surface is pressed, the resonance frequency of the disk 11 can be shifted to a higher frequency than when only the clamp area 11a of the disk 11 is pressed (see FIG. 15). As a result, it is possible to improve the vibration resistance while realizing downsizing of the disk device.

  Further, even when the disk 11 is warped toward the clamper 610 (that is, when the outside of the disk 11 is warped so as to be lifted), the first contact portion 610a of the clamper 610 and the second contact. The warp of the disk 11 can be corrected by pressing both the clamp area 11a and the surface of the data area 11b of the disk 11 with the portion 610b.

  In the present embodiment, since the first contact portion 610a and the second contact portion 610b extend in the rotation circumferential direction of the clamper 61, the disk 11 can be pressed uniformly. And the posture of the disk 11 during rotation can be stabilized.

Modified example.
6 and 7 are an exploded perspective view and a side sectional view showing a clamper 620 according to a modification of the first embodiment.

  In the first embodiment described above, the second contact portion 610b of the clamper 610 is formed as an annular convex portion. However, in this modification, the second contact portion 622 of the clamper 620 is disposed in the circumferential direction. Are formed by three convex portions 622A, 622B, and 622C.

  As shown in FIGS. 6 and 7, the clamper 620 according to this modification includes a first contact portion 621 and a second contact portion 622 that contact the disk 11. The first abutting portion 621 is an annular convex portion similar to the first abutting portion 610 a of the first embodiment described above, and is formed at a position where it abuts on the clamp region 11 a of the disk 11.

  On the other hand, the 2nd contact part 622 is comprised by the 1st, 2nd and 3rd convex part 622A, 622B, 622C arrange | positioned in the circumferential direction. The lower surfaces of these convex portions 622A, 622B, and 622C are first, second, and third contact surfaces 622a, 622b, and 622c, respectively, and the surface of the data area 11b of the disk 11 (opposite of the recording surface). Surface). Further, the first to third contact surfaces 622a, 622b, and 622c are formed so that the center hole 11c of the disk 11 is positioned inside a triangle formed by connecting them together.

  In addition, in FIG. 6, although the 1st-3rd convex part 622A, 622B, 622C is formed in disk shape, it is not limited to such a shape. Further, the first contact part 621 may be a plurality of contact parts like the second contact part 622 shown in FIG.

  According to this modification, the first contact portion 621 and the second contact portion 622 (first, second, and third contact surfaces 622a, 622b, and 622c) of the clamper 620 are used to Since the surfaces of the clamp area 11a and the data area 11b are pressed, the resonance frequency of the disk 11 can be shifted to a higher frequency and the vibration resistance can be improved as in the first embodiment.

Embodiment 2. FIG.
8 and 9 are an exploded perspective view and a side sectional view showing the clamper 630 of the disk device according to Embodiment 2 of the present invention. 8 and 9, the same components as those of the disk device 10 of the first embodiment are denoted by the same reference numerals. The disk device of the second embodiment is configured in the same manner as the disk device 10 of the first embodiment except for the configuration of the clamper 630. Hereinafter, the configuration of the clamper 630 will be described.

  As shown in FIGS. 8 and 9, the clamper 630 has a first contact portion 630 a, a second contact portion 630 b, and a third contact portion 630 c that contact the disk 11. The first, second, and third contact portions 630a, 630b, and 630c are all annular convex portions that are centered on the rotation center of the clamper 630, and the position of the clamper 630 in the rotational radius direction is different from each other. is there.

  The first contact portion 630 a of the clamper 620 is formed at a position that contacts the clamp area 11 a of the disk 11. The second contact portion 630b is formed at a position that contacts the surface of the data area 11b of the disk 11 (the surface opposite to the recording surface). The third contact portion 630c is formed at a position where the third contact portion 630c contacts the surface of the data region 11b of the disk 11 (region outside the region where the second contact portion 630b contacts).

  According to the present embodiment, the first contact portion 630a presses the clamp area 11a of the disc 11, and the second and third contact portions 630b and 630c press the surface of the data area 11b of the disc 11. Therefore, the resonance frequency of the disk 11 can be shifted to a higher frequency, and the vibration resistance can be improved.

  Further, since the first contact portion 630a presses the clamp area 11a of the disc 11 and the second and third contact portions 630b and 630c press the surface of the data area 11b of the disc 11, the disc 11 is clamped. When warped to the 630 side, the warp can be corrected more reliably.

  Here, a configuration example in which the first contact portion 630a presses the clamp region 11a of the disk 11 and the second and third contact portions 630b and 630c press the surface of the data region 11b of the disk 11 will be described. However, there may be two or more contact portions that contact the clamp area 11a, or there may be three or more contact portions that contact the surface of the data area 11b. In any case, it goes without saying that the same effect can be obtained.

Embodiment 3 FIG.
10 and 11 are an exploded perspective view and a side sectional view showing a clamper 640 of the disk device according to Embodiment 3 of the present invention. 10 and 11, the same components as those of the disk device 10 according to the first embodiment are denoted by the same reference numerals. The disk device of the third embodiment is configured in the same manner as the disk device 10 of the first embodiment except for the configuration of the clamper 640. Hereinafter, the configuration of the clamper 640 will be described.

  In the first embodiment described above (FIG. 4), the first and second contact portions 610a and 610b of the clamper 610 are formed on the lower surface of the disk-shaped portion. In the third embodiment, the clamper A second contact portion 640b of 640 is configured as an annular member, and is supported by the first contact portion 640a via a spoke 631.

  That is, the clamper 640 is a disk-like member having substantially the same diameter as the clamp region 11a of the disk 11, and a first contact portion 640a as an annular convex portion is formed along the outer periphery thereof. Furthermore, a plurality of (here, five) flexible spokes 631 extend radially from the outer periphery of the disk-shaped member having the first contact portion 640a, and the tips of these spokes 631 In addition, a second contact portion 640b as an annular member is fixed.

  The first and second abutting portions 640 a and 640 b are both formed in an annular shape centering on the rotation center of the clamper 640, and the first abutting portion 640 a is in a position where it abuts on the clamp region 11 a of the disk 11. The formed second contact portion 640b is formed at a position that contacts the surface of the data area 11b of the disk 11 (the surface opposite to the recording surface).

  When the material of the clamper 640 is resin, the spoke 631 can be resin-molded to give flexibility. In this case, in the initial state before the disk 11 is sandwiched, the second contact portion 640b can be configured to be positioned closer to the turntable 507 (that is, below) than the first contact portion 640a.

  FIGS. 12A and 12B are side views showing the clamping operation of the disk 11 by the clamper 640 and the turntable 507 in the third embodiment. 12A shows a state before the disk 11 is sandwiched, and FIG. 12B shows a state where the disk 11 is sandwiched.

  As shown in FIG. 12A, in a state before the disc 11 is sandwiched, the second contact portion 640b is lower than the first contact portion 640a (hidden in FIG. 12A). It is located on the side, that is, the turntable 507 side. As shown in FIG. 12B, when the disk 11 is clamped, the first contact portion 640a presses the clamp area 11a of the disk 11, and the second contact section 640b is the surface of the data area 11b of the disk 11. Press.

  At this time, since the second contact portion 640b is attached to the tip of the flexible spoke 631 and is located closer to the turntable 507 than the first contact portion 640a, the disk 11 Even when it is warped on the turntable 507 side (that is, when it is warped on the opposite side to the warp shown in FIG. 12A), the first contact portion 640a and the second contact The portion 640b can be reliably brought into contact with the disk 11.

  When the disk 11 is warped to the clamper 640 side (FIG. 12A), the disk 11 is moved between the first contact part 640a and the second contact part 640b by the elastic force of the spoke 631. The warp of the disk 11 can be corrected by pressing. Thus, even if the disk 11 is warped in any direction, the resonance frequency can be shifted to a higher frequency and the vibration resistance can be improved.

  Note that, as described in the third embodiment, the configuration in which the contact portion is connected via the spoke 631 is also applied to the modification of the first embodiment (FIG. 6) and the second embodiment (FIG. 8). Can do. For example, the second contact portion 622 having the plurality of contact surfaces 622a, 622b, and 622c described in the modification of the first embodiment (FIG. 6) may be provided at the tip of the spoke 631. Further, the first contact portion 630a described in the third embodiment (FIG. 8) is formed on the lower surface of the disc-shaped portion of the clamper 640, and the second and third contact portions 630 are formed on the outside thereof via the spokes 631. The contact portions 630b and 630c may be connected. In either case, it goes without saying that the same effect can be obtained.

  As described above, according to the present embodiment, since the first contact portion 640a and the second contact portion 640b are connected by the flexible spoke 631, the disk 11 is in any direction. Even if there is a warp, the resonance frequency can be shifted to a higher frequency, thereby improving the vibration resistance.

Embodiment 4 FIG.
13 and 14 are an exploded perspective view and a side sectional view showing a clamper 650 of the disk device according to Embodiment 4 of the present invention. 13 and 14, the same reference numerals are given to the same components as those of the disk device 10 according to the first embodiment. The disk device of the fourth embodiment is configured in the same manner as the disk device 10 of the first embodiment except for the configuration of the clamper 650. Hereinafter, the configuration of the clamper 650 will be described.

  The clamper 650 has a first contact portion 650 a and a second contact portion 650 b that contact the disk 11. The first and second contact portions 650a and 650b are configured in the same manner as the first and second contact portions 610a and 610b described in the first embodiment.

  In the present embodiment, a first vibration damping material 700a made of, for example, silicon is attached to the bottom surface (contact surface) of the first contact portion 650a. Further, a second vibration damping material 700b made of, for example, silicon is attached to the bottom surface of the second contact portion 650b.

  When the first contact part 650a presses the clamp area 11a of the disk 11 and the second contact part 650b presses the surface of the data area 11b of the disk 11, the first and second contact parts 650a, Since the first and second vibration damping materials 700a and 700b are affixed to 650b, the first and second vibration damping materials 700a and 700b are slightly deformed according to the unevenness and warpage of the disk 11, and the disk 11 Therefore, a large contact surface of the clamper 650 can be secured.

  In addition, since the clamper 650 presses the disk 11 via the first and second vibration damping materials 700a and 700b, even if there is resonance of the disk 11 or the clamper 650, the influence can be suppressed.

  As described above, according to the present embodiment, the first and second vibration damping members 700a and 700b are provided in the first and second contact portions 650a and 650b, so that the clamper 650 contacts the disk 11. A sufficient contact surface can be ensured, and the influence of resonance of the disk 11 and the clamper 650 can be suppressed to further improve the vibration resistance.

  Here, the case where the damping material is applied to the contact surface of the clamper 650 configured in the same manner as in the first embodiment has been described. However, the damper is not limited to the contact portion of the clamper described in the second and third embodiments. You may stick a vibration material. For example, a damping material made of silicon or the like may be attached to the first to third contact surfaces 630a, 630b, and 630c described in the second embodiment. Moreover, you may attach the damping material which consists of silicon | silicone etc. to each contact surface of 1st and 2nd contact part 640a, 640b (it is mutually connected by the spoke 631) demonstrated in Embodiment 3. FIG. . In either case, it goes without saying that the same effect can be obtained.

Comparative example.
FIG. 15 is a cross-sectional view showing a clamp mechanism as a comparative example with respect to the embodiment of the present invention. The clamp mechanism shown in FIG. 15 has a turntable 507 fixed to a disk type motor 512a, and a clamper 600 biased by a spring or magnet in the disk rotation axis direction with respect to the turntable 507. . The clamper 600 and the turntable 507 are configured to sandwich the clamp area 11 a of the disk 11.

  In the comparative example shown in FIG. 15, since the clamper 600 and the turntable 507 sandwich only the clamp area 11a of the disk 11, the disk 11 has a diameter of 120 mm, a thickness of 1.2 mm, and a material made of polycarbonate CD, In the case of DVD or the like, the resonance frequency is in the vicinity of 80 Hz to 100 Hz. In order to obtain a sufficient damping effect at such a low frequency, the vibration-proof effective volume of a damper (for example, an oil-filled damper) must be increased, which hinders downsizing of the disk device.

  On the other hand, in the disk device of each embodiment described above, the clamper presses the clamp area 11a of the disk 11 and the surface of the data area 11b, so that only the clamp area 11a of the disk 11 is shown in FIG. The resonance frequency of the disk 11 can be shifted to a higher frequency than when pressing. Therefore, the vibration-proof effective volume of the damper may be relatively small, and thereby the vibration resistance performance can be improved while realizing the downsizing of the disk device.

  In each of the above-described embodiments, the disk device 10 having the reproducing unit 200 provided with the read head unit 513 (FIG. 3) has been described. However, a disk device having a write head unit may be used. Further, the disk 11 is not limited to a CD, DVD, BD, HD DVD or the like, but may be another type of disk.

1 is a top perspective view of a playback unit of a disk device according to Embodiment 1 of the present invention. FIG. FIG. 2 is a bottom perspective view of the reproduction unit shown in FIG. 1. It is a perspective view of the reproduction | regeneration unit which removed the clamp mechanism. It is a disassembled perspective view for demonstrating the clamp mechanism which concerns on Embodiment 1 of this invention. It is a sectional side view for demonstrating the clamp mechanism of the disc apparatus which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the clamp mechanism of the disc apparatus which concerns on the modification of Embodiment 1 of this invention. It is a sectional side view which shows the clamp mechanism of the disc apparatus which concerns on the modification of Embodiment 1 of this invention. It is a disassembled perspective view which shows the clamp mechanism of the disc apparatus based on Embodiment 2 of this invention. It is a sectional side view which shows the clamp mechanism of the disc apparatus based on Embodiment 2 of this invention. It is a disassembled perspective view which shows the clamp mechanism of the disc apparatus which concerns on Embodiment 3 of this invention. It is a sectional side view which shows the clamp mechanism of the disc apparatus which concerns on Embodiment 3 of this invention. It is a side view which shows the clamp operation | movement which concerns on Embodiment 3 of this invention. It is a disassembled perspective view which shows the clamp mechanism of the disc apparatus based on Embodiment 4 of this invention. It is sectional drawing for demonstrating the clamp mechanism of the disc apparatus based on Embodiment 4 of this invention. It is sectional drawing which shows the clamp mechanism of the disc apparatus which concerns on a comparative example.

Explanation of symbols

  10 disk device, 11 disk, 11a clamp area, 11b data area surface, 11c center hole, 100 housing, 200 playback unit, 301 damper pin, 302 oil-filled damper, 504 support base, 504c, 504f vertical bent piece, 508b vertical bent Piece, 504d Information reading window, 504e, 504g Support shaft, 507 Turntable, 508 Clamp plate, 509 Tensile coil spring, 512 Circuit board, 512a Disk type motor, 513 Reading head, 551 Feed screw shaft, 552 Guide shaft, 553 Support Member, 554 motor, 556 cover, 610, 620, 630, 640, 650 clamper, 610a, 621, 630a, 640a, 650a first 610b, 622b, 630b, 640b, 650b second contact part, 630c third contact part, 622a first contact surface, 622b second contact surface, 622c third contact Surface, 631 spoke, 700a first damping material, 700b second damping material.

Claims (5)

A head unit for reading or writing information on the disk;
A turntable on which the disk is placed;
A rotatable clamper that sandwiches the disk with the turntable,
The clamper is
A first abutting portion that abuts the clamp area of the disc;
Contact the opposite surface of the recording surface of the data area of the disk, a second contact portion having a plurality of abutment surfaces disposed in the rotational circumferential direction of said damper,
A disk device comprising a flexible spoke for connecting the first contact portion and the second contact portion .   The disk device according to claim 1, wherein the first contact portion extends in an annular shape in a rotation circumferential direction of the clamper. The plurality of contact surfaces of the second contact portion are arranged in the circumferential direction of the clamper, and the center hole of the disk is located inside the three contact surfaces. The disk device according to claim 1, wherein the disk device is a disk device. In the first contact portion and said second contact portion, each contact surface abutting on said disk, any one of claims 1 to 3, characterized in that damping material is attached 2. The disk device according to item 1. In the initial state before contacting the disk, the first contact portion and the second contact portion are positioned so that the second contact portion is positioned closer to the turntable than the first contact portion. The disk device according to any one of claims 1 to 4, wherein a contact portion is connected via the spoke.

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