JP2008071461A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device in which interference between a disk and other members, especially, optical units can be prevented in a process in which the disk is fixed to a turntable freely rotatably. <P>SOLUTION: The disk device includes a processing mechanism performing processing of recording or playback for the disk, a case housing this processing mechanism inside, and a front bezel 14 having an opening part. A projection part 38 is formed toward the processing mechanism from the front bezel 14. This projection part 38 regulates tilt of the disk when the disk is fixed to the turntable contacting with an end part of the disk. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical disk apparatus, and more particularly to a disk apparatus having a mechanism for preventing the disk from interfering with other members when the disk is clamped to a turntable.

  As this type of disk device, for example, as disclosed in Japanese Utility Model Laid-Open No. 7-4136, when a disk is placed on a tray and carried into the apparatus, the turntable is moved upward to lift the carried disk, Some disc clampers arranged above the table have a configuration in which the disc is rotatably fixed on the turntable. The operation of clamping the disc to the turntable by the disc clamper is also called disc chucking.

  In this type of disk device, various mechanisms have been conventionally used to prevent the disk from interfering with other members and causing damage to the recording surface of the disk, and to prevent the recording / reproducing characteristics of the disk from being impaired. ing.

  For example, Japanese Patent Laying-Open No. 2005-302251 discloses a disk device that restricts vertical movement of a flexible recording disk and prevents collision or sliding contact with an optical unit. Since this disk device includes a guide member that generates an air flow pressure to regulate the vertical movement of the recording disk, even if a force directed to the recording / reproducing head acts on the disk, The movable range in the direction of the recording / reproducing head can be limited, and as a result, collision between the recording / reproducing head and the disk can be avoided.

  Japanese Patent Laid-Open No. 2005-302274 includes a disk tray having a large-diameter disk mounting portion and a small-diameter disk mounting portion, and is elastically deformable to hold the small-diameter disk on the peripheral wall of the small-diameter disk mounting portion. An optical disk device having a variable claw is described.

  Japanese Patent Laid-Open No. 2003-317360 discloses a disc in which a convex portion having a shape in which the cross-sectional area gradually decreases toward the tip is formed in the region corresponding to the disc storage portion from the top plate to the inside of the disc device. An apparatus is described. According to this disk device, since air flows along the surface of the convex portion, the rapid change of the airflow generated when the disk rotates at high speed is prevented, and the recording / reproducing characteristics of the disk due to the turbulence of the airflow Can be avoided.

  The disk device described in Japanese Patent Application Laid-Open No. 10-106248 has a protrusion on the lower surface of the case that regulates the inclination of the disk, and the outermost peripheral edge of the disk contacts the protrusion even when an impact is applied to the disk. As described above, the disc is regulated so that the tilt of the disc does not increase. Furthermore, the disc-facing surface of the tray has a convex portion that regulates the tilt of the disc. Even when the disc is tilted with respect to the support surface of the turntable, the outermost peripheral edge of the disc abuts the convex portion, and more It is regulated so that the tilt of the disk does not increase.

In addition, there is a disk device described in Japanese Patent Application Laid-Open No. 2005-222607 as background art related to the present invention.
Japanese Utility Model Publication No. 7-4136 JP 2005-302251 A JP 2005-302274 A JP 2003-317360 A JP-A-10-106248 JP 2005-222607 A

  In recent years, optical pickups have been increased in size to cope with optical disks of different formats. Therefore, in order to avoid interference between the optical pickup and the circuit board, the optical pickup is arranged on the outer peripheral side of the disk when the disk is loaded into the disk device or when the disk is unloaded from the disk drive device. .

  However, even in this case, in the process of carrying the disk into the disk device and then chucking it on the turntable, the turntable that rotates upward to the disk side flips the disk so that the disk tilts from the horizontal state and the outer edge of the disk There is a problem that the part contacts the optical pickup.

  In the disk device described in Patent Document 1, the disk becomes free between the turntable and the disk clamper in the process of chucking the disk to the turntable, and the disk comes into contact with the optical pickup.

  Further, the means for restricting the movement of the disk described in other patent documents does not prevent the disk from coming into contact with the optical unit in the process of chucking the disk on the turntable. Furthermore, Patent Document 6 discloses that a claw-shaped protrusion is formed from the upper end of the front bezel toward the disk device side. However, there is a consideration about the fact that this protrusion regulates the inclination of the disk. Absent.

  It is an object of the present invention to provide a disk device capable of preventing the disk from interfering with other members, particularly an optical unit, in the process of rotatably fixing the disk to a turntable.

  In order to achieve the above object, the present invention is characterized in that a collision avoidance member is provided on the front bezel so that the disk does not collide with the pickup. The present invention also relates to a disk device comprising: a processing mechanism that performs recording or reproduction processing on a disk; a case that accommodates the processing mechanism; and a front bezel that is attached to the front surface of the case and has an opening. The processing mechanism carries the disk into the processing mechanism via a turntable, a base having the turntable, a clamp of the disk located on the top of the turntable, an optical unit, and the opening. And a circuit board. When the tray enters the processing mechanism, the base moves to the tray side, and the clamper rotatably fixes the disk to the turntable. The front bezel includes a protruding portion that protrudes toward the processing mechanism, and the processing mechanism includes the disc. When fixing to the turntable, the front bezel side end of the disc is in contact with the protrusion, and the tilt of the disc is regulated so that the optical unit side end of the disc does not interfere with the optical unit. It is characterized by being formed.

  A first preferred embodiment of the present invention is characterized in that the protruding portion is provided at the center of the processing mechanism in the width direction at the upper end portion of the front bezel. Second, the protrusion is also a reinforcing rib of the front bezel.

  Third, the processing mechanism side end of the protrusion is formed as a tapered surface facing the disk. Fourth, the taper surface of the projecting portion is set such that the distance between the end portion of the disc that contacts the end portion on the front bezel side and the placement surface of the disc of the tray is 2 mm to 5.5 mm. Is formed. The fifth is characterized in that an edge where no data is recorded is in contact with the tapered surface at the upper end of the outer peripheral edge of the disk.

  As described above, according to the present invention, it is possible to provide a disk device capable of preventing the disk from interfering with other members, particularly the optical unit, in the process of rotatably fixing the disk to the turntable.

  FIG. 1 is a perspective view showing an entire disk device 10 according to the present invention. The disk device includes a box-like case (or a case or a case) 12 that houses a processing mechanism that performs processing for recording / reproducing on a disk, and a front bezel 14 that closes an open end of the front surface of the case. And a tray 16 for inserting the recording disk into the processing mechanism or ejecting the disk from the processing machine. The processing mechanism mainly includes a recording / reproducing mechanism centering on the optical pickup and a disk driving mechanism for carrying in / out the disk to / from the recording / reproducing mechanism.

  FIG. 2 is an exploded perspective view of the disk device shown in FIG. The case 12 includes a metal upper case 12D in which a top plate 12C and a side plate 12A are integrally formed, and a bottom plate 12B. The processing mechanism 11 is accommodated in a space formed between the upper case 12D and the bottom plate 12B. Reference numeral 13 denotes a frame to which the processing mechanism 11 is fixed.

  At the left and right ends of the front bezel 14, strip-shaped pieces 32 that protrude toward the processing mechanism 11 are provided. At the tip of the small piece 32, there is a claw 32A that engages with the opening 35 formed on the front bezel side of the side plate 12C from the inside of the side plate 12C.

  The disc tray 16 advances and retracts toward the main body of the processing mechanism 11 in the direction along the arrow 50 through the opening 34 of the front bezel 14. Reference numeral 20 denotes a tray driving unit that moves the tray back and forth. The tray 16 includes a plate 16B on which a disk is placed and a front panel 16A that covers the opening 34 of the front bezel 14. Reference numeral 17 denotes an opening formed in the plate 16B.

  Reference numeral 22 denotes a turntable that rotatably supports the disk. The disc is chucked between the tene table 22 and a disc clamp provided on the back surface of the top plate 12C. The turntable 22 is fixed to the front bezel 14 side of the base 31. The rear end of the base has a shaft (not shown) extending in the width direction of the processing mechanism 11, and this shaft is fixed to the frame 13 so as to be rotatable. With this axis as the center, the base 31 rotates in the direction approaching the disk placed on the plate 16B of the tray 16 or in the direction away from the disk. When the tray 16 enters the driving device, the base 31 rotates so as to approach the tray 16. The opposite is true when the tray 16 is ejected from the drive.

  When the disc is placed on the plate 16B and then the tray 16 is inserted into the apparatus, the base rotates, and the turntable 22 moves upward beyond the opening 17 to lift the disc placed on the tray. Next, a clamp on the back surface of the top plate 12C rotatably fixes the disc to the turntable.

  Reference numeral 24 denotes an optical pickup as an optical unit, which moves in the direction along the arrow 51 while facing the recording surface of the disc through the opening 25. A circuit board 18 is provided between the bottom plate 12B and the base 13. The circuit board 18 includes an electronic component that controls the rotation of the turntable 22, an electronic component that controls the drive unit 20 of the tray, and an electronic component that controls movement of the optical pickup 22 and reproduction / recording. The optical pickup irradiates the disc with laser light.

  FIG. 3 is a perspective view of the main part of the processing mechanism as viewed from above, and FIG. 4 is a perspective view of the processing mechanism as viewed from the bottom. The tray drive unit 20 includes a first pulley 20A attached to the rotation shaft of the motor, a second pulley 20B in which the rotation of the first pulley 20A is transmitted by a belt, and an intermediate gear 20C rotated by the second pulley 20B. The pinion 20D is rotated by the intermediate gear 20C and meshes with the rack formed on the tray.

  Therefore, the electronic circuit moves the tray 16 forward and backward with respect to the recording / reproducing mechanism by controlling the rotation direction of the motor. In addition, the code | symbol 24B of FIG. 4 is the screw shaft 24B rotated by the motor 24A. The optical pickup 24 includes a screw shaft 20B and a slider 24C constituting a ball screw. When the motor 24A rotates, the screw shaft 24B rotates, and the slider 24C reciprocates along the screw shaft 24A in accordance with the rotation of the screw shaft 24B.

  FIG. 5 is a perspective view of the main part of the processing mechanism in which the tray is accommodated as seen from the front, and FIG. 6 is a perspective view of the main part of the processing mechanism as seen from the back. A protrusion 38 is provided integrally with the front bezel 14 from the center in the width direction of the processing mechanism at the upper end of the front bezel 14 toward the processing mechanism.

  As shown in the perspective view of the front bezel of FIG. 7A viewed from the rear side, the protruding portion 38 has substantially trapezoidal small pieces 38A, 38A-1, 38A- having end faces 38B on the processing mechanism side formed in a tapered shape. There are 3 in total. Although described in detail in FIG. 8 and subsequent figures, here, as schematically shown as (B), the upper end of the front side of the disk 40 contacts the end face 38B of each small piece when the disk is tilted. (B) is the figure which looked at the protrusion part 38 from the plane direction. (A) does not show a disk. As shown in FIG. 5B, the protruding portion 38 wraps on the projection surface of the disc and protrudes toward the disc side. Therefore, the taper surface of the protruding portion can contact the tip of the inclined disk.

  The small piece 38A is provided at the center of the front bezel, while the small pieces 38A-1 and 38A-2 are provided symmetrically on the front bezel with the small piece 38A interposed therebetween. As shown in (B), the small piece 38A faces the center of the disc 40, but the small piece 38A-1 and the small piece 38A-2 face a portion slightly away from the center of the disc 40. These small pieces extend slightly toward the center of the disk 40 from the central small piece 38A so that the upper end of the disk 40 comes into contact with the tapered surfaces of the small pieces 38A-1 and 38A-2.

  In (A), the code | symbol 36 is the flange formed toward the process mechanism side in the position near the upper end of a bezel. This flange has a function of preventing the fragments of the disk from scattering when the disk rotating at high speed is damaged. The protrusion 38 extends beyond the base end 36A of the flange 36 to the processing mechanism side. Therefore, the central region of the flange 36 is expanded in a trapezoidal shape so as to cover the upper end of the protruding portion 38. The front bezel shown in FIG. 7 (A) having the flange 36 and the protruding portion 38 is integrally formed of resin, for example.

  (C) is a comparative example of a front bezel. The front bearzel shown in (C) has a rib 39 that reinforces the flange 36 in place of the protruding portion 38 shown in (A) without protruding from the base end 36 </ b> A of the flange 36. That is, the protruding portion 38 of (A) also serves as a rib that reinforces the front bezel. As shown in (B), since the plurality of protruding pieces (small pieces) are in contact with the end of the disc evenly, there is an effect that the restriction of the disc tilt can be applied uniformly to the disc.

  8 is a sectional view taken along line XIII-XIII in FIG. An enlarged view of IX shown in FIG. 8 is shown in FIG. An enlarged view of X is shown in FIG. In FIG. 8, after the disc 40 is inserted into the disc device by the tray 16, the turntable 22 is magnetically coupled to the clamp 44 on the inner surface of the top plate 12C, and the disc is chucked between the clamp and the turntable. It shows just before. At this time, as shown in the figure, the disc is tilted toward the bottom plate 12B, that is, the rear side of the disc, that is, the optical pickup 24 side, with respect to the bottom plate 12B of the driving device (also to the top plate 12C). The front side (also the front bezel side) is inclined toward the top plate 12C side.

  As shown in FIG. 9, the edge 41, which is the upper end of the outer periphery of the disk, is in contact with the tapered surface 38B of the protrusion 38A, and the inclination of the disk is restricted. The tapered surface 38B is formed such that the width from the end surface of the front bezel along the radial direction of the disk 40 gradually decreases from the top plate 12C to the bottom plate 12B.

  The height H1 from the disk mounting surface 17 of the tray to the point 41 where the edge 41 of the disk is in contact with the tapered surface 38B is such that the flat surface of the disk contacts the upper end 46 of the optical pickup 24 as shown in FIG. It is determined with a value that does not. FIG. 10 shows that there is a margin indicated by H2 between the flat surface of the disk and the upper end 46 of the optical pickup 24 when the edge 41 of the disk 40 contacts the tapered surface 38B. H1 in FIG. 9 is designed to be in a range of 2 mm to 5.5 mm. If it is less than 2.0 mm, the disc may come into contact with the protruding portion 38 when the disc 40 is fixed to the turntable and rotated.

  On the other hand, if it exceeds 5.5 mm, the optical pickup side end of the disc may come into contact with the optical pickup. However, this numerical range is an example in the present embodiment, and is not limited to this range. In short, any value within the range where the optical pickup side end of the disk does not contact the optical pickup may be used.

  Next, an example of calculating this numerical value will be described. Reference numeral 40 ′ in FIG. 9 indicates a state where the disk is chucked on the turntable, that is, a state where the disk is horizontal without being tilted. With the disk clamped on the turntable, the distance H1 ′ between the recording surface of the disk and the disk mounting surface of the tray was set to 1.9 mm.

  At this time, if the diameter of the turntable is φ30, when the disc is tilted as shown in FIG. 8 after contacting the slope of the turntable (“60” in FIG. 8) when arcing the disc, arcsin (1.9 / (60− 45)) = 2.42 °. From this value, the lifting amount on the front side of the disc is (60 + 15) * sin2.42 ° = 3.17 mm. When the thickness of the disk is added to this, 3.17 mm + 1.2 mm = 4.37 mm, and H1 = 4.37 mm is optimal.

  Note that 1.9 mm, which is the distance between the disk recording surface and the disk mounting surface of the tray, is a distance necessary to ensure the clearance between the disk and the protrusion 38 when the disk rotates, and the disk is chucked on the turntable. At this time, it is also a distance necessary for the inclined surface 60 for drawing the disk at the upper part of the turntable.

  FIG. 11 is a comparative example of FIG. 9, and the flange 39 of FIG. 7C cannot contact the tilted disk. As shown in FIG. 12 (comparative example of FIG. 10), the disk 40 is above the optical pickup. It will come into contact with the end face 46.

  As described above, according to the invention described in the present embodiment, in the process of carrying the disk into the disk device and then chucking it on the turntable, the turntable jumps up the disk and the disk tilts from the horizontal state. Even in such a case, the protrusion can be in contact with the end of the disk to regulate the inclination of the disk. Therefore, it is possible to provide a disk device that can prevent the disk from interfering with other members, particularly the optical unit, in the process of rotatably fixing the disk to the turntable.

  In the embodiment described here, the end of the protruding portion has been described as a tapered surface, but may be formed in a non-linear shape such as a curved surface or an annular shape as long as it can contact the edge of the disk. In FIG. 9, the optimum amount of the protrusion amount H3 of the protrusion 38A from the front bezel and the taper surface angle θ are appropriately applied from the viewpoint of preventing contact between the disk and the optical pickup during disk chucking. .

1 is a perspective view showing an entire storage disk device according to the present invention. It is a disassembled perspective view of the drive device shown in FIG. It is the perspective view which looked at the principal part of the processing mechanism from the plane. It is the perspective view which looked at the principal part of the processing mechanism from the bottom. It is the perspective view which looked at the principal part of the processing mechanism in which the tray was accommodated from the front. It is the perspective view which looked at the principal part of the processing mechanism in which the tray was accommodated from the back. (A) is the perspective view which looked at the front bezel concerning the present invention from the back side. (B) is the schematic diagram which looked at the protrusion part and the disk from the plane direction. (C) is the perspective view which looked at the front bezel concerning a comparative example from the back. It is sectional drawing seen from the VIII-VIII direction of FIG. It is an enlarged view of the IX part of FIG. FIG. 9 is an enlarged view of a portion X in FIG. 8. It is an enlarged view which shows the comparative example of FIG. It is an enlarged view which shows the comparative example of FIG.

Explanation of symbols

  10 disk device, 11 processing mechanism, 12 case, 14 front bezel, 16 tray, 22 turntable, 24 optical pickup, 38 protrusion

Claims (7)

In a disk device comprising: a processing mechanism that performs recording or reproduction processing on a disk; a case that houses the processing mechanism; and a front bezel that is attached to the front surface of the case and has an opening.
The processing mechanism carries the disk into the processing mechanism via a turntable, a base having the turntable, a clamp of the disk positioned above the turntable, an optical unit, and the opening. A tray and a circuit board, and when the tray enters the processing mechanism, the base moves to the tray side, and the clamper rotatably fixes the disk to the turntable. And
The front bezel includes a protrusion that protrudes toward the processing mechanism.
When the processing mechanism fixes the disk to the turntable, the front bezel side end of the disk is in contact with the protrusion, so that the optical unit side end of the disk does not interfere with the optical unit. And a disc device that regulates the tilt of the disc.   The disk device according to claim 1, wherein the protruding portion is provided at an upper end portion of the front bezel at a center in a width direction of the processing mechanism.   The disk device according to claim 1, wherein the protrusion is also a reinforcing rib of the front bezel.   4. The disk device according to claim 1, wherein the processing mechanism side end of the protrusion is formed as a tapered surface facing the disk. 5.   The tapered surface of the projecting portion is formed so that the distance between the end of the disc that contacts the front bezel side end and the disc mounting surface of the tray is in the range of 2 mm to 5.5 mm. The disk device according to claim 4, wherein   The disk apparatus according to claim 4, wherein an edge where no data is recorded is in contact with the tapered surface at an upper end portion of an outer peripheral edge of the disk.   A disk device in which a disk can be mounted, wherein the disk is irradiated with laser light, a turntable to which the disk is fixed, and the disk does not collide with the pickup when the disk is fixed to the turntable. A disk device having a front bezel provided with a collision avoidance member.

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