JP4246354B2 - Disk unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk device that performs at least one of reproduction and recording of a disk such as an optical disk or a magneto-optical disk, which is a disk-shaped recording medium such as a digital video disk (abbreviation DVD) and a compact disk (abbreviation CD).
[0002]
[Prior art]
Discs such as DVDs and CDs are basically made of a synthetic resin material such as polycarbonate. Therefore, the disk is easily deformed by waviness in the thickness direction. In the prior art, such a disc deformed in the thickness direction is not ejected and conveyed from the table after the reproduction or recording ends, and remains in the disc device.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a disk device that can be surely discharged and conveyed from a table on which the disk is mounted even when the disk is deformed in the thickness direction.
[0004]
[Means for Solving the Problems]
  The present invention includes a turntable on which a disk is placed;
  An optical pickup for reproducing or recording the disc;
  Moving means for moving the optical pickup;
  Disk conveying means for conveying the disk;
  A clamp member that presses the disk onto the turntable;
  A clamp holder for rotatably holding the clamp member;
  Elevating means for elevating and lowering the clamp holder;
  The clamp holder has a locking piece for lifting the lower part of the outer peripheral edge of the disk upward when it is raised by the elevating means.And
  The locking pieces are respectively arranged on both the left and right sides in the conveying direction of the disk,
  And it is formed to be inclined as it goes inward in the radial direction of the disk,
  Point contact between the lower part of the outer peripheral edge of the disk and the upper surface of the locking pieceThe disc device is characterized by the above.
[0005]
  According to the present invention, a DVD or CD and other types of discs areCarrySentturnBrought directly above the table and by lifting meansClampWhen the holder is lowered, the discturnOn the tablePlacementBy the clamp memberPressingIs done.turnThe disk is reproduced or recorded by the optical pickup in a state where the table is rotationally driven around the rotational axis by the rotational drive source.
[0006]
  After playing or recording the discturnAfter the rotation of the table is stopped, the lifting meansClampRaise the holder.ClampAt the bottom of the outer periphery of the discFor lifting upA locking piece is provided, and thereforeClampWhile the holder is raised, the outer periphery of the discClampAs the holder rises, it is raised. ThusturnOn the tablePlacementThe disc that had beenClampIt is lifted by the locking piece of the holder. The disc thus lifted can be smoothly ejected and conveyed by the disc conveying means. Therefore, even if the disk is deformed in the thickness direction,turnThere is no risk of remaining on the table and being no longer transported.
[0008]
  AlsoThe locking pieces provided on the clamp holder are provided on both the left and right sides of the disc transport direction by the disc transport means, thereby shifting the lower part of the outer peripheral edge of the disc on the turntable 180 degrees in the circumferential direction. As the clamp holder is lifted by the lifting means at the raised position, it can be lifted. This ensures that the disc is lifted from the turntable and can be ejected and conveyed.
[0010]
  AlsoThe locking piece is formed to be inclined as it goes inward in the radial direction of the disk. For example, the locking piece is formed so as to be inclined downward as it goes inward in the radial direction of the disk, and the lower part of the outer peripheral edge of the disk and the upper surface of the locking piece are in point contact with each other. Even with a disc having a recording layer formed up to 3 mm, the outer peripheral edge of such a disc is not damaged by contact with the locking piece, and reproduction / recording in the vicinity of the outer peripheral edge of the disc is performed reliably. be able to.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
  FIG. 1 is a simplified plan view showing the overall configuration of an embodiment of the present invention. In the DVD playback apparatus 501, the DVD 504 is inserted into the apparatus main body 505 from the insertion / ejection port 502 as indicated by an arrow 503. The DVD 504 is rotationally driven around a rotational axis 507 substantially perpendicular to the paper surface of FIG. 1 by a rotational drive source 506 in the apparatus main body 505.TurntableGet on table 508(Placement)Is done. The DVD mounted on the table 508 is indicated by reference numeral 509. The content of the recording layer of the DVD 509 is read out and reproduced from the DVD 509 using laser light from the objective lens 512 provided in the optical pickup 511. The optical pickup 511 is guided by a main shaft 513 that is a screw rod and a sub shaft 514. The optical pickup 511 is the innermost position in the radial direction of the DVD 509 indicated by a broken line in FIG. 1 and the DVD 509 indicated by a virtual line 515. It is possible to move back and forth in the moving direction 516 between the radially outermost positions.
[0012]
The main shaft 513 is a screw rod that is rotationally driven around its axis by a moving drive source 517, and a nut member 518 attached to the optical pickup 511 is screwed to the main shaft 513. In this way, the optical pickup 511 can be moved along the moving direction 516 in the virtual plane parallel to the paper surface of FIG. 1 in the base 519 of the apparatus main body 505 by the main shaft 513 and the sub shaft 514. The optical axis of the objective lens 512 is on a straight line 521 passing through the rotation axis 507 of the table 508 in the virtual plane, and the optical axis of the objective lens 512 is perpendicular to the virtual plane.
[0013]
The main shaft 513, the sub shaft 514, the moving drive source 517, and the nut member 518 constitute moving means 522 that moves the optical pickup 511 in a moving direction 516 parallel to the straight line 521 of the base 519.
[0014]
FIG. 2 is a front view showing the upper limit position of the disk 509 when the disk 509 viewed from the insertion / eject port 502 of the DVD playback apparatus 501 is spaced directly above the table 508, and FIG. 3 is a front view showing the disk 509 on the table 508. It is a front view which shows the state in the lower limit position mounted | worn and reproduced | regenerated. A disc 509 to be reproduced inserted from the insertion / ejection port 502 includes a conveyance roller 671 having a horizontal rotation axis perpendicular to the insertion direction 503, and a sliding piece 672 disposed above the conveyance roller 671. The disk 509 is inserted / conveyed immediately above the table 508 as shown in FIG. When the disc 509 after reproduction is ejected and conveyed from the insertion / ejection port 502, the disc 509 is at the upper limit position with an interval immediately above the table 508, as in FIG. The disk 509 is sandwiched between the slide piece 672 on the transport roller 671 and inserted / transported as described above. When the disk 509 is reproduced, as shown in FIG. 3, the conveying roller 671 is lowered below the disk 509 with a gap to restrict the lowering of the sliding piece 672, and thus the disk 509 is mounted on the table 508. . The conveying roller 671 of the disk conveying means 673 and the clamping means 675 are raised to the upper limit position in FIG. 2 to release the mounting of the disk 509 on the table 508, and the conveying roller 671 and the clamp are clamped as shown in FIG. In order to lower the means 675 to the lower limit position of FIG. 3 and mount the disk 509 on the table 508, elevating means 676 are provided on both sides of the base body 519 of the apparatus main body 505.
[0015]
  The clamp means 675 basically holds a clamp member 676 for mounting the inserted disk 509 on the table 508 and the clamp member 676.Clamp holderA holder 678 and a spring member 679 attached to the holder 678 and resiliently pressing the clamp member 676 toward the table 508 are included. The clamp member 677 of the clamp means 675 is displaced up and down to the upper limit position in FIG. 2 and the lower limit position in FIG.
[0016]
4 is a plan view of the holder 678 constituting the clamping means 675, FIG. 5 is a front view of the holder 678 as viewed from below in FIG. 4, FIG. 6 is a right side view of the holder 678, and FIG. It is a left side view of the holder 678. The holder main body 681 of the holder 678 is formed with a storage hole 683 having an axis 682 in the thickness direction (a direction perpendicular to the paper surface of FIG. 4 and a vertical direction of FIG. 5). A clamp member 677 is inserted into the storage hole 683 and disposed. The holder main body 681 has elevating convex portions 686, 687, and 688 which are fixed to the left and right side portions 684 and 685 so as to protrude outward.
[0017]
  The side portions 684 and 685 of the holder 678 are provided with locking pieces 691 and 692 that are locked to the lower part of the outer peripheral edge of the disk 509. These locking pieces 691 and 692 are arranged on both the left and right sides in the insertion direction 503 of the disk 509 (that is, both the right and left sides in FIG. 4). These locking pieces 691 and 692 are directed toward the radially inner side of the disk 509, as clearly shown in FIG.ThisThus, it is formed to be inclined so as to approach the table 508, that is, to be lower in FIG. Accordingly, when the disk 509 is deformed in the thickness direction, for example, when the disk 509 is lifted for discharging and transporting the disk 509 as shown in FIG. 2 from the state of being mounted on the table 508 as shown in FIG. The lower part of the outer peripheral edge of 509 is lifted in point contact with the upper surfaces of the locking pieces 691, 692. As a result, the mounted state of the disk 509 on the table 508 is surely released, and the part near the insertion / discharge port 502 of the disk 509 is discharged and transported while being sandwiched between the transport roller 671 and the sliding piece 672. That will be certain. Since the disk 509 makes point contact with the locking pieces 691 and 692 as described above, there is no possibility that the outer peripheral edge of the disk 509 is damaged by the contact of the locking pieces 691 and 692.
[0018]
The holder main body 681 is formed with a plurality (three in this embodiment) of locking protrusions 693. The locking protrusions 693 are arranged at intervals of, for example, 90 degrees in the circumferential direction, and protrude from the surface opposite to the table 508 (upper side in FIGS. 5 to 7).
[0019]
FIG. 8 is an enlarged plan view of the locking protrusion 693 and the vicinity thereof. Each locking projection 693 includes a connecting portion 694 that is continuous with the surface of the holder body 681 opposite to the table 508, and a locking portion 695 that is continuous with the connecting portion 694 and extends outward from the connecting portion. FIG. 16 described later shows an enlarged cross section showing a state in which a spring member 679 is attached to the locking protrusion 693. The holder main body 681 is also provided with positioning protrusions 696 that are spaced apart in the circumferential direction.
[0020]
The locking protrusion 693 is arranged so as to be shifted from the positioning protrusion 696 in one direction 701 in the circumferential direction of the storage hole 683. The displacement prevention protrusion 697 and the guide portion 698 are formed to be symmetrical with respect to the axis 682 by being shifted by 180 degrees in the circumferential direction of the storage hole 683. The holder main body 681 can be easily manufactured by pressing a metal plate.
[0021]
FIG. 9 is a cross-sectional view taken along section line IX-IX in FIG. The holder main body 681 is also formed with a displacement prevention protrusion 697 which is a first displacement prevention portion protruding from the surface opposite to the table 508. A guide portion 698 is formed closer to the other direction 702 in the circumferential direction of the storage hole 683 than the protrusion 697 for displacement prevention. The guide portion 698 has an operation portion guide inclined surface 699, and becomes higher from the surface 690 of the holder main body 681 upward in FIG. 9 as it becomes one direction 701 opposite to the other direction 702. Raised and formed.
[0022]
10 is a plan view of the spring member 679, FIG. 11 is a front view of the spring member 679 viewed from below in FIG. 10, and FIG. 12 is a side view of the spring member 679 viewed from the left in FIG. The spring member 679 can be manufactured by pressing a metal plate such as iron having a flat shape and elastic force in the thickness direction. The spring member main body 703 of the spring member 679 includes a peripheral edge portion 704 surrounding the outer side in the radial direction of the storage hole 683 formed in the holder main body 681, and a cover portion 705 covering the upper side of the storage hole 683. The storage hole 683 is provided with a locking protrusion 693 protruding inward in the radial direction. The cover portion 705 covers and covers the storage hole 683 on the side opposite to the table 508 (upward in FIGS. 11 and 12), and is formed by the cover portion 705 above the storage hole 683 when the disk 509 is played back. A space 706 (see FIG. 13 below) is formed.
[0023]
FIG. 13 is an enlarged cross-sectional view of a part of the spring member main body 703. With the disk 509 mounted on the table 508, the peripheral edge of the clamp member 677 is detached upward from the housing hole 683 in FIG. 13, and the cover 705 on the spring member main body 703 side in the thickness direction of the holder main body 681. Is stored in a space 706 formed by the Locking holes 707 are formed in the peripheral portion 704 of the spring member main body 703 at regular intervals of 90 degrees in the circumferential direction, for example.
[0024]
FIG. 14 is a plan view of the locking hole 707 and the vicinity thereof. The locking hole 707 is elongated in the circumferential direction corresponding to the combination of the locking protrusion 693 and the positioning protrusion 696 formed in the holder main body 681. The locking hole 707 has an insertion hole 708 formed at an end portion in one circumferential direction 701 and a positioning long hole 709 connected to the insertion hole 708.
[0025]
Referring to FIG. 8 described above, when the width of the locking portion 695 of the locking protrusion 693 is W1, the width of the connecting portion 694 is W2, and the outer diameter of the positioning protrusion 696 is D1, W1> D1 ≧ Set to W2.
[0026]
In the locking hole 707 of the spring member main body 703, the width W3 of the insertion hole 708 in FIG. 14 is determined as W3> W1, and the width W4 of the positioning long hole 709 is selected as W4 = D1. W4> D1 may be sufficient. When the locking projection 693 is inserted into the insertion hole 708 and the spring member 679 is angularly displaced with respect to the holder 678 in the other direction 702 in the circumferential direction, the connecting portion 694 of the locking projection 693 is positioned for positioning from the insertion hole 708. In the long hole 709, a connection hole 710 that is inclined so as to continuously decrease from the width W3 to the width W4 is formed. Accordingly, the connecting portion 694 of the locking protrusion 693 can smoothly enter the positioning long hole 709 from the insertion hole 708.
[0027]
FIG. 15 is a cross-sectional view of the insertion hole 708 viewed from one circumferential direction 701 in FIG. The locking portion 695 is smoothly inserted into the insertion hole 708, and a cut and raised piece 711 is formed to improve the strength.
[0028]
In FIG. 16, protrusions 713 are formed on both sides of the positioning hole 709 of the locking hole 707 in the spring member main body 703 at midway positions in the longitudinal direction on the arc of the positioning hole 709. The protruding portion 713 protrudes on the side opposite to the surface 690 of the holder main body 681 (upward in FIG. 16). When the height of the connecting portion 694 in the protrusion 693 is H11 and the height of the protruding portion 713 in the natural state is H12, H11 <H12. Therefore, when the protruding portion 713 comes into contact with the locking portion 695 of the locking projection, the peripheral edge portion 704 of the spring member main body 703 is locked between the locking portion 695 and the surface 690 of the holder main body 681 and is elastic. The spring member main body 703 is attached to the holder main body 681. The protruding portion 713 is formed of a part of a substantially spherical surface, and thus the locking portion 695 can smoothly move on the protruding portion 713. At this time, the positioning protrusion 696 fits snugly into the positioning long hole 709 and is displaced on an arc centered on the axis 714 (see FIG. 10 described above) of the cover portion 705. Thus, the axis 714 of the spring member main body 703 coincides with the axis 682 (see FIG. 4 described above) of the accommodation hole 683 of the holder main body 681.
[0029]
In the spring member main body 703, an elongated operation portion 715 extends outward in the radial direction (left-right direction in FIGS. 10 and 11). The operation portion 715 is formed with a displacement prevention through-hole 716 which is a second displacement prevention portion. The displacement prevention through-hole 716 is formed radially outward from the housing hole 683 of the holder main body 681, and thus the cover portion 705 of the spring member main body 703. The displacement prevention projection 697 formed on the holder main body 681 fits exactly in the displacement prevention through hole 716. With the displacement preventing projection 697 fitted in the displacement preventing through-hole 716, the protrusion 713 has the surface 690 of the holder main body 681 and the engaging portion 695 of the engaging protrusion 693 as shown in FIG. And the angular displacement between the holder main body 681 and the spring member 679 around the axes 682 and 714 is prevented. Such a combination of the displacement prevention protrusion 697 and the operation portion 715 is formed in line symmetry by being shifted by 180 ° in the circumferential direction of the axis 714.
[0030]
The free end portion 717 of the operation portion 715 moves away from the surface 690 of the holder main body 681 as it goes radially outward (in the left-right direction in FIGS. 10 and 11), that is, upward in FIG. Inclined. As a result, the operation of attaching the spring member 679 to the holder main body 681 and the operation of removing the spring member 679 from the holder main body 681 can be easily performed. The free end 717 can be easily grasped and picked up from the surface 690 upward in FIG. 11 against the elastic force of the operation portion 715.
[0031]
Referring again to FIG. 9, when attaching the spring member 679 to the holder main body 681, the operation unit 715 is operated by operating the guide unit 698 by angularly displacing the operation unit 715 about the axis 714 in one circumferential direction 701. As a result, the operation portion 715 can be smoothly brought above the displacement prevention protrusion 697. In this way, the displacement prevention through-hole 6 formed in the operation portion 715 is brought just above the displacement prevention protrusion 697 and fits snugly. As a result, the assembly workability is good.
[0032]
Referring again to FIGS. 10 to 12, in the vicinity of the cover portion 705 of the spring member 703 corresponding to the storage hole 683 of the holder main body 681, there is a circumferential interval in the vicinity of the outer peripheral portion in the radial direction of the storage hole 683. A plurality of (four in total, 90 ° in this embodiment) holding pieces 719 are formed. The holding piece 719 continues from the peripheral edge portion 704 to the table 508 and a connecting portion 720 extending downward in FIGS. 11 and 12. In this way, the holding piece 719 is disposed at a distance from the spring member main body 703 in the thickness direction, and protrudes inward in the radial direction. The holding piece 719 holds the outer peripheral portion of the surface of the clamp member 677 on the table 508 side, for example, at the upper limit position of the clamping means 675 in FIG.
[0033]
The holder main body 681 shown in FIG. 4 is provided with a notch 721 and an attachment piece 722. Another mounting piece 723 (see FIG. 12) formed on the spring member main body 703 is elastically locked to the mounting piece 722 on the table 508 side. In place of these mounting pieces 722 and 723, in another embodiment of the present invention, a combination of the aforementioned locking protrusion 693, positioning protrusion 696, and locking hole 707 may be used.
[0034]
FIG. 17 is a plan view of a spring piece 724 constituting a part of the spring member 679, and FIG. 18 is a cross-sectional view taken along the section line XVIII-XVIII in FIG. The spring piece 724 is fixed to the cover portion 705 of the spring member main body 703 by welding, a connecting portion 726 connected to the fixing portion 725, and extends from the free end portion of the connecting portion 726 toward the fixing portion 725. For example, it is formed by pressing or the like of a metal plate that has a pressing portion 727 and exhibits a spring force. The pressing portion 727 extends while being inclined toward the lower clamp member 677, and makes point contact with the central convex portion 729 of the clamp member 677 on the axis 714. The axis 714 matches the rotation axis of the table 508.
[0035]
19 is a plan view of the clamp member 677, FIG. 20 is a side view of the clamp member 677, and FIG. 21 is a cross-sectional view of the clamp member 677. The clamp member 677 is made of a ferromagnetic material, for example, a metal material such as iron, and the surface thereof can be contacted with low friction between the central convex portion 729 and the pressing portion 727 of the spring piece 724. Plating is applied. Such a clamp member 677 has an excellent advantage that shearing and molding can be easily performed by press working. A flat portion 731 is continuous with the central convex portion 729 of the clamp member 677. A plurality of fitting protrusions 732 are formed on the flat portion 731 so as to protrude downward in FIG. 21 toward the table 508.
[0036]
FIG. 22 is an enlarged cross-sectional view of the vicinity of the fitting convex portion 732. In this embodiment, a total of three fitting protrusions 732 are formed at equal intervals in the circumferential direction. The outer peripheral surface 735 of the fitting convex portion 732 exists in common on the virtual cylindrical surface 737 coaxial with the rotation axis 736 of the clamp member 677.
[0037]
A disc pressing portion 734 made of a disc is connected to the flat portion 731 of the clamp member 677 via a connecting portion 733 outward in the radial direction of the fitting convex portion 732. Further, an annular holding portion 738 held by the holding piece 719 of the spring member 679 is continuous with the outer side of the disk pressing portion 734 in the radial direction. The disk pressing portion 734 presses the upper surface of the disk 509 on the table 508 in a ring shape. The fitting convex portion 732 is inserted through the central hole 739 of the disk 509.
[0038]
FIG. 23 is a cross-sectional view showing a part near the table 508, FIG. 24 is a plan view of the table 508, and FIG. 25 is an enlarged cross-sectional view showing a state where the disk 509 is mounted on the table 508 with a clamp member 677. FIG. A fixed hole 742 is fitted into a rotation shaft 741 having a rotation axis 507 of the rotation drive source 506. The annular permanent magnet piece 743 magnetically attracts the flat portion 731 of the clamp member 677. An annular groove 744 concentric with the rotation axis 507 is formed in the table 508. An inner peripheral surface 745 radially outward of the concave groove 744 fits closely with an outer peripheral surface 735 of the fitting convex portion 732 of the clamp member 677.
[0039]
Referring to FIG. 22 again, the free end portion 746 of the fitting convex portion 732 is connected to the outer peripheral surface 735 and approaches the free end portion (as it goes downward in FIG. 22) inward in the radial direction. An inclined first guide inclined surface 747 is formed. Corresponding to the first guide inclined surface 747, a second guide inclined surface 748 is formed on the table 508 as shown in FIG. The second guide inclined surface 748 is continuous with the inner peripheral surface 745 of the concave groove 744 and is inclined radially outward (to the right in FIG. 25) as it approaches the clamp member 733 (as it goes upward in FIG. 25). Formed. Accordingly, when the clamp member 733 descends to the table 508, the fitting convex portion 732 can be easily fitted into the concave groove 744 by the action of the first and second guide inclined surfaces 747 and 748. The disk pressing portion 734 of the clamp member 733 causes the disk 509 to move to the flat disk-shaped receiving portion 549 of the rod-shaped rotating body of the rotation drive source 506 by the magnetic attraction force between the clamp member 733 and the permanent magnet piece 743. The disc 509 is stably mounted on the table 508 by being pressed onto the annular interposed piece 751 fixed to the receiving portion 549.
[0040]
Referring to FIG. 8 again, the holder main body 681 is formed with a plurality of support pieces 755 that protrude inward in the radial direction at intervals in the circumferential direction of the storage hole 683. The inner end 756 in the radial direction of the storage hole 683 of the support piece 755 is formed on an arc that forms a part of a perfect circle in one imaginary plane in FIG. 4 parallel to the holder main body 681. Point contact is made with the radially outer end of the clamp member 677 in the hole 683. As a result, the frictional force at the time of contact between the clamp member 677 and the support piece 755 can be reduced, and the disc 509 can be smoothly mounted on the table 508 by the clamp member 677. The inner end 756 of the support piece 755 exists on a virtual circle 757 having a center on the axis 682 in a virtual plane on the paper surface of FIG. 4 perpendicular to the axis 682. Therefore, the clamp member 677 in the storage hole 683 can have the axis 729 of the clamp member 677 substantially coincide with the axis 682 of the storage hole 683.
[0041]
A central hole 739 of the disk 509 is fitted into a mounting portion 754 that is perpendicular to the receiving portion 749 from a guide inclined portion 753 formed radially outward from the concave groove 744 of the table 508.
[0042]
The disk 509 may be a digital video disk (DVD) or a compact disk (CD), and may be such an optical disk. In addition, the disk 509 is a disk such as a magneto-optical disk. May be.
[0043]
The present invention can be implemented not only in connection with a disc playback apparatus, but also in connection with a disc recording apparatus, and can also be implemented in connection with a playback and recording apparatus. it can.
[0044]
【The invention's effect】
  According to the present invention of claim 1, even if the disk is deformed in the thickness direction and the shape of the center hole is deformed,ClampThe locking piece provided on the holderPuhoWhen Ruda rises,turnOn the tablePlacementThe lower part of the outer peripheral edge of the disc is lifted upward. As a result, the disk transport means can reliably eject and transport the disk.
[0045]
  AlsoThe disc can be lifted from the turntable by the pair of left and right engaging pieces, thereby further ensuring the delivery and conveyance by the disc conveying means.
[0046]
  AlsoThe locking piece is formed so as to be inclined as it goes inward in the radial direction of the disc, for example, downwardly as it goes inward in the radial direction of the disc, and the lower part of the outer peripheral edge of the disc and the upper surface of the locking piece Since it contacts, there is no possibility that the outer periphery of the disk will be damaged by contact with the locking piece. As a result, information can be reproduced / recorded to the very vicinity of the outer periphery of the disc.
[Brief description of the drawings]
FIG. 1 is a simplified plan view showing the overall configuration of an embodiment of the present invention.
FIG. 2 is a front view showing an upper limit position of a disk 509 in which a disk 509 viewed from the insertion / ejection port 502 of the DVD playback apparatus 501 is present immediately above the table 508;
FIG. 3 is a front view showing a state in which a disc 509 is in a lower limit position where the disc 509 is mounted on the table 508 and reproduced.
FIG. 4 is a plan view of a holder 678 constituting the clamp means 675. FIG.
5 is a front view of the holder 678 as viewed from below in FIG. 4. FIG.
6 is a right side view of the holder 678. FIG.
7 is a left side view of the holder 678. FIG.
FIG. 8 is an enlarged plan view of a locking protrusion 693 and the vicinity thereof.
9 is a cross-sectional view taken along section line IX-IX in FIG. 4;
10 is a plan view of a spring member 679. FIG.
11 is a front view of a spring member 679 as viewed from below in FIG.
12 is a side view of the spring member 679 viewed from the left in FIG.
13 is an enlarged cross-sectional view of a part of a spring member main body 703. FIG.
FIG. 14 is a plan view of a locking hole 707 and the vicinity thereof.
15 is a cross-sectional view of the insertion hole 708 viewed from one circumferential direction 701 in FIG.
FIG. 16 is a cross-sectional view of the locking hole 707 as viewed from the cutting plane line XVI-XVI.
17 is a plan view of a spring piece 724 constituting a part of the spring member 679. FIG.
18 is a cross-sectional view taken along section line XVIII-XVIII in FIG.
19 is a plan view of a clamp member 677. FIG.
20 is a side view of the clamp member 677. FIG.
21 is a cross-sectional view of the clamp member 677. FIG.
FIG. 22 is an enlarged cross-sectional view of the vicinity of the fitting convex portion 732;
FIG. 23 is a cross-sectional view showing a part near the table 508 by cutting away.
24 is a plan view of a table 508. FIG.
25 is an enlarged cross-sectional view showing a state where a disk 509 is mounted on a table 508 by a clamp member 677. FIG.
[Explanation of symbols]
501 DVD playback device
506 Rotation drive source
507 axis of rotation
508 table
509 disc
511 Optical pickup
519 substrate
675 Clamping means
676 Lifting means
677 Clamp member
678 Holder
679 Spring member
681 Holder body
683 storage hole
693 Locking projection
694 Connection
695 Locking part
696 Positioning protrusion
697 Protrusion for displacement prevention
699 Operation guide slope
701 one direction
702 Other direction
703 Spring member body
704 peripheral edge
705 cover part
706 space
707 Locking hole
708 Press hole
709 Positioning slot
715 operation unit
716 Through hole for displacement prevention
717 free end
719 Holding piece
722 Mounting piece
723 Mounting piece
724 Spring piece
729 Center convex part
732 Mating convex part
734 Disc pressing part
735 outer peripheral surface
737 Virtual circumference
739 Central hole
743 Permanent magnet piece
744 Annular groove
746 free end
747 First Guide Slope
748 2nd guide slope
753 Guide slope
754 wearing part
755 support piece

Claims (1)

A turntable on which to place the disc,
An optical pickup for reproducing or recording the disc;
Moving means for moving the optical pickup;
Disk conveying means for conveying the disk;
A clamp member that presses the disk onto the turntable;
A clamp holder for rotatably holding the clamp member;
Elevating means for elevating and lowering the clamp holder;
Said clamp holder, have a locking piece for lifting the bottom of the outer peripheral edge of the disc upwardly when lifted by said lifting means,
The locking pieces are respectively arranged on both the left and right sides in the conveying direction of the disk,
And it is formed to be inclined as it goes inward in the radial direction of the disk,
The disk device according to claim 1, wherein the lower part of the outer peripheral edge of the disk and the upper surface of the locking piece are in point contact .

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