JP4051951B2 - Disk unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk apparatus, and more particularly to a disk apparatus configured to mount a disk-shaped recording medium on a turntable provided on a tray.
[0002]
[Prior art]
As a conventional disk device, for example, there is a CD-ROM device configured to be mounted on a notebook personal computer or the like. In this type of CD-ROM device, the width of the tray on which the disk-shaped recording medium is mounted is made smaller than the diameter of the disk-shaped recording medium (hereinafter simply referred to as “disk”), thereby reducing the thickness of the personal computer. It corresponds to the weight reduction.
[0003]
As this type of CD-ROM device, for example, as shown in FIG. 1A, a tray 3 is slidably supported in a tray housing portion 2 of a metal frame 1. A turntable 4 on which the disk is clamped is provided on the upper surface. Further, inside the tray 3, there are provided a motor for rotating the turntable 4 (not visible by being hidden by the turntable) and an optical pickup 5 for reading information recorded on the disk.
[0004]
In addition, the tray 3 is unlocked by a lock mechanism (not shown) by pressing an eject button (not shown) provided on the front bezel 6 attached to the front surface of the tray 3 in the eject direction. It becomes possible to move. Furthermore, the tray 3 is formed so that the width dimension is smaller than the diameter (12 cm) of the disc.
[0005]
Further, a protruding portion 8 of the frame 1 is extended and formed on the side of the tray storage portion 2 so as to face the protruding portion of the disk protruding from the tray 3 in a crescent shape. Further, the tray 3 housed in the tray housing portion 2 and the upper portion of the overhanging portion 8 of the frame 1 are covered with a sheet metal cover (not shown).
[0006]
The disc clamped on the turntable 4 is mounted so as to face the upper surface 3a of the tray 3 and the overhanging portion 6, and is rotated in the space covered by the cover.
[Problems to be solved by the invention]
However, in the disk device configured as described above, when an external impact is applied, there is a possibility that the peripheral part of the disk clamped on the turntable 4 will vibrate in the vertical direction and collide with the cover or the overhanging portion 8. is there.
[0007]
Further, as shown in FIG. 1B, since the upper surface 3a of the tray 3 is at a position higher than the overhanging portion 6 of the frame 1, when the disk 7 bends downward, the lower surface of the rotationally driven disk 7 is As indicated by the broken line, the lower surface (recording surface) of the disk 7 may be damaged due to rubbing against the edge 3b of the upper surface 3a of the tray 3.
[0008]
Accordingly, an object of the present invention is to provide a disk device that solves the above-described problems.
[0009]
[Means for Solving the Problems]
The invention described in claim 1 has a turntable on which a disc-shaped recording medium is mounted, a tray formed in a width dimension smaller than the diameter of the disc-shaped recording medium, and the tray that is used for the disc-shaped recording medium. The disc-shaped recording that is supported so as to move to a disc exchanging position to be exchanged or a disc loading position for accommodating the disc-shaped recording medium, and protrudes to the side of the tray when the tray moves to the disc loading position. And a frame having a projecting portion projecting so as to face the medium, and at least a region of the projecting portion facing the disc-shaped recording medium when the tray is moved to the disk mounting position. the low-friction member formed by coating, higher than the disc storage portion of the upper surface is the tray of the low-friction member It is characterized in that, without touching the corner recording surface of the disc-shaped recording medium of the tray by also periphery is bent disk-shaped recording medium by an external shock comes into contact with the low-friction member This prevents the recording surface of the disk-shaped recording medium from being damaged.
The invention according to claim 2 is characterized in that the low friction member is formed on the entire surface of the overhanging portion facing the disk-shaped recording medium, and the disk-shaped recording is performed by an external impact. Even if the medium bends, the peripheral portion contacts the low friction member, so that the recording surface of the disc-shaped recording medium does not contact the corner portion of the tray, thereby preventing the recording surface of the disc-shaped recording medium from being damaged.
[0010]
The invention according to claim 3 is such that the corner portion of the tray formed at the boundary between the tray and the overhanging portion has an R shape or a chamfered shape, and even if the disk-shaped recording medium is bent due to an external impact. Since there is no corner of the tray, the recording surface of the disk-shaped recording medium is prevented from being damaged even when an excessive impact is input.
[0011]
The invention of claim 4, wherein includes a first locking portion for engaging so as to restrict movement along the front bezel that is attached to the front in the moving direction of the tray, locking in the first locking portion And a second locking portion that locks so as to restrict movement in the release direction, and even when a force acts in a direction in which the front bezel is pulled out, the front bezel can be prevented from falling off.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a plan view showing an embodiment of the disk apparatus according to the present invention.
As shown in FIG. 2, the disk device 11 is a drive device to which a disk-shaped recording medium such as a CD-ROM or CD-R, CD-RW, DVD-ROM, DVD-RAM, etc. is mounted. When the optical disk 22 is placed on the tray 20 and the tray 20 is moved to the mounting position (direction B), information is recorded or reproduced.
[0013]
The disk device 11 has a turntable 18 at the center of the tray 20, and the turntable 18 has a clamp mechanism 23 that fits into the center hole of the disk 22 and clamps the disk 22 from the inner periphery. In addition, a disc storage portion 24 having a diameter larger than the diameter of the optical disc 22 is formed around the turntable 18.
[0014]
An optical pickup 26 for reading information recorded on the disk 22 clamped by the clamp mechanism 23 of the turntable 18 is attached below the disk storage unit 24 so as to be movable in the disk radial direction.
[0015]
The tray 20 is slidably supported by a metal frame 16 having a shielding effect. Further, the circuit board 12 provided on the frame 16 and a board (not shown) attached to the lower surface of the tray 20 are electrically connected via a flexible wiring board 13. A connector 12 a to which one end of the flexible wiring board 13 is connected is attached to the circuit board 12. Connectors 14 a and 14 b are attached to the substrate (not shown) of the tray 20.
[0016]
The flexible wiring board 13 includes a first wiring board 15 connected to the fixed-side connector 12a, second wiring boards 17 and 19 connected to the movable-side connectors 14a and 14b, and the first wiring board 15. And a third wiring board 21 that connects the second wiring boards 17 and 19 to each other.
[0017]
The tray 20 is provided so as to be capable of moving in the radial direction of the optical disk 22 and to record information on the optical disk 22 or to optically record information recorded on the optical disk 22. It has an optical pickup 26 for reading.
[0018]
The tray 20 is supported by the guide rail mechanisms 40 and 42 with respect to the frame 16 so as to be slidable in the A and B directions, and is manually moved to the disk replacement position or the disk mounting position.
[0019]
The horizontal width of the tray 20 is smaller than the diameter of the optical disk 22, which contributes to reducing the size and thickness of the disk device 11. Accordingly, the optical disk 22 clamped on the turntable 18 protrudes from the disk storage portion 24 of the tray 20 in a crescent shape.
[0020]
Therefore, on the side of the tray 20, an overhanging portion 16 a that protrudes laterally from the right side surface of the frame 16 is provided in order to protect the overhanging portion of the optical disk 22 that protrudes from the disc storage portion 24. The projecting portion 16a is formed to face the lower surface (recording surface side) of the optical disk 22 clamped by the turntable 18 with a predetermined gap.
[0021]
And the low friction member 25 is coat | covered by the crescent-shaped area | region (it shows by hatching in FIG. 2) facing the lower surface of the optical disk 22 on the upper surface of the overhang | projection part 16a. The low friction member 25 is made of a material having a very small number of friction systems on the surface (for example, tetrafluoroethylene resin, PET (polyethylene terephthalate) resin, etc.).
[0022]
The low friction member 25 is provided so as to cover the upper surface of the overhanging portion 16a by sticking a sheet-like member made of the resin material as described above with an adhesive or the like. Alternatively, the low friction member 25 may be a sheet-like seal in which a low friction resin layer is laminated on the surface of an adhesive seal.
[0023]
FIG. 3 is a plan view showing a state in which the tray is inserted into the disk loading position. FIG. 4 is a perspective view showing a state in which the tray is inserted into the disk mounting position.
[0024]
As shown in FIGS. 3 and 4, when the tray 20 is housed in the frame 16, the protruding portion of the optical disk 22 clamped on the turntable 18 is formed on the low friction member 25 formed on the upper surface of the protruding portion 16a. Opposing via a predetermined gap. Therefore, when an external impact is input and the peripheral edge of the optical disk 22 bends, the peripheral edge of the optical disk 22 comes into sliding contact with the surface of the low friction member 25.
[0025]
Since the surface of the low friction member 25 has a small coefficient of friction, the recording surface of the optical disk 22 is prevented from being damaged even if the peripheral edge of the optical disk 22 contacts.
[0026]
The optical pickup 26 is accommodated in a concave portion 24a of the disc accommodating portion 24, and the concave portion 24a is covered with a pickup cover 28 having an opening 28a in a range in which the objective lens 27 of the optical pickup 26 moves. The front bezel 30 coupled to the front end of the tray 20 is provided with an eject button 32 in the center.
[0027]
In addition, a disk motor (not shown) for rotating the disk 22 clamped by the turntable 18 and the clamp mechanism 23 is provided below the turntable 18.
[0028]
As shown in FIG. 2, when the eject button 32 provided on the front bezel 30 is pressed, the locking of the tray 20 by the lock mechanism (not shown) provided on the frame 16 is released. Since the tray 20 is slidably supported via the guide rail mechanisms 40 and 42 on both sides, the unlocked tray 20 is slid in the direction A by manual operation and pulled out to the disk replacement position.
[0029]
Further, the disk 22 is clamped to the turntable 18 of the tray 20 drawn to the disk replacement position. Thereafter, the operator presses the front bezel 30 in the B direction to return the tray 20 to the disk mounting position shown in FIGS. Then, the tray 20 returned to the disk mounting position is locked by a lock mechanism (not shown) provided on the frame 16.
[0030]
The pickup drive mechanism 34 is a pair of guide shafts 35, 36 that guides the moving direction of the optical pickup 26, a drive motor 37 that drives the optical pickup 26, and a transmission that transmits the rotational driving force of the drive motor 37 to the optical pickup 26. And a mechanism 38.
[0031]
FIG. 5 is a longitudinal sectional view showing the height relationship between the tray 20 and the low friction member 25.
As shown in FIG. 5, the disc storage portion 24 of the tray 20 is higher than the overhanging portion 16 a of the frame 16 by a dimension _HA . However, low-friction member 25 formed on the protruding portion 16a has its upper surface is formed to a thickness dimension only slightly higher critical dimension H _B than the disc storage portion 24.
[0032]
Therefore, when an external impact is input and the peripheral edge of the optical disk 22 is bent, the peripheral edge of the optical disk 22 comes into sliding contact with the surface of the low friction member 25 as indicated by a broken line in FIG. The lower surface of the optical disc 22 does not contact the end portion 21 of the disc storage portion 24 of the tray 20. Thereby, the optical disk 22 is prevented from being damaged by the end 21 of the disk storage portion 24 at the lower surface, which is the recording surface.
[0033]
Further, the disc storage portion 24 of the tray 20 has an end portion 21 formed at the boundary with the overhang portion 16a in an R shape, and has a smooth shape with respect to the overhang portion 16a. Therefore, for example, when the disk device 11 is accidentally dropped on the floor, a large impact is applied to the optical disk 22 and it is bent further downward than the position indicated by the broken line in FIG. In this case, even if the lower surface, which is the recording surface, contacts the end portion 21 of the disk storage portion 24, it is prevented from being greatly damaged.
[0034]
Furthermore, by making the end of the tray facing the disk lower surface and the upper surface of the overhanging portion 16a smooth, the flow of air generated below the disk during high-speed rotation of the disk can be made smooth. Therefore, the generation of air vortices can be suppressed and the operation sound and vibration of the disk device can be reduced.
[0035]
Of course, the end 21 may have a shape (for example, a chamfered shape) other than the R shape as described above.
[0036]
FIG. 6 is a bottom view for explaining the mounting structure of the front bezel 30. FIG. 7 is a bottom view of the front bezel 30.
As shown in FIGS. 6 and 7, the front bezel 30 has four hooks (first locking portions) 30 a projecting from the rear surface, and the hooks 30 a are laterally orthogonal to the moving direction of the tray 20. A recess 30b extending to the bottom.
[0037]
Further, on the back surface of the front bezel 30, a protrusion (second engagement) that restricts movement in the lateral direction (C, D direction) perpendicular to the moving direction (A, B direction) of the tray 20 with respect to the front bezel 30. (Stop part) 30c protrudes.
[0038]
Further, an L-shaped protrusion 44 that engages with the hook 30a of the front bezel 30 extends in the lateral direction (C, D direction) perpendicular to the moving direction (A, B direction) of the tray 20 on the front surface of the tray 20. It is formed in the existing direction. Further, a triangular stopper 46 that locks the protrusion 30 c is provided on the front surface of the tray 20.
[0039]
As shown in FIG. 8, when the front bezel 30 is attached to the front surface of the tray 20, the relative position between the position of the hook 30 a protruding from the rear surface of the front bezel 30 and the L-shaped protrusion 44 provided on the front surface of the tray 20. Match the positions.
[0040]
When this state is enlarged, the recess 30b of each hook 30a faces the tip of the L-shaped protrusion 44 as shown in FIG. At the same time, the protrusion 30 c of the front bezel 30 faces the inclined portion 46 a of the triangular stopper portion 46 provided on the front surface of the tray 20.
[0041]
Next, when the front bezel 30 is moved in the D direction, as shown in FIG. 10, the tip of the L-shaped protrusion 44 is fitted in the recess 30b of each hook 30a, and the tray moving direction (A, B direction). And movement in the D direction orthogonal to the tray moving direction is restricted. At the same time, the protrusion 30c of the front bezel 30 passes through the inclined portion 46a of the triangular stopper portion 46 provided on the front surface of the tray 20 and is locked to the corner portion 46b of the stopper portion 46. Movement to is prevented.
[0042]
As a result, the front bezel 30 is restricted from moving in the A, B, C, and D directions with respect to the front surface of the tray 20, so that the front bezel 30 can be reliably prevented from falling off from the tray 20 even when a force in the A direction acts from the outside. Is done.
[0043]
In the above embodiment, the configuration used for the CD-ROM device 10 is given as an example. However, the present invention is not limited to this. For example, a CD-R / RW device, a DVD-ROM device, a DVD-RAM device, a DVD- Of course, the present invention can also be applied to an R / RW device or a magneto-optical disk device.
[0044]
Moreover, in the said Example, although the low friction member 25 was affixed on the area | region facing the disk protruded from the tray 20, it is not restricted to this, You may affix the low friction member 25 on the whole surface of the overhang | projection part 16a. Of course.
[0045]
【The invention's effect】
As described above, according to the first aspect of the present invention, there is provided a tray having a turntable on which a disc-shaped recording medium is mounted, the tray having a width smaller than the diameter of the disc-shaped recording medium, and the tray having the tray. A disc replacement position for exchanging the disc-shaped recording medium or a disc mounting position for supporting the disc-shaped recording medium is supported so as to move, and when the tray moves to the disc mounting position, the tray protrudes to the side of the tray. And a frame having a projecting portion projecting so as to face the disk-shaped recording medium, and at least the disk-shaped recording medium of the projecting portion when the tray is moved to the disk mounting position. the low friction member formed by coating the opposite region, the low upper surface of the friction member disks yield of the tray Which is characterized in that is higher than parts, the recording surface is tray corner portion of the disc-shaped recording medium by the peripheral portion also deflects the disk-shaped recording medium by an external shock comes into contact with the low-friction member It is possible to prevent the recording surface of the disk-shaped recording medium from being damaged.
According to a second aspect of the present invention, the low-friction member is formed on the entire surface of the overhanging portion facing the disk-shaped recording medium. Prevents the recording surface of the disk-shaped recording medium from coming into contact with the corners of the tray and damaging the recording surface of the disk-shaped recording medium even when the disk-shaped recording medium is bent. be able to.
[0046]
According to the invention described in claim 3, since the corner portion of the tray formed at the boundary between the tray and the overhanging portion has an R shape or a chamfered shape, even if the disk-shaped recording medium is bent due to an external impact, the tray Therefore, even if an excessive impact is input, it is possible to prevent the recording surface of the disk-shaped recording medium from being damaged.
[0047]
Further, according to the fourth aspect of the present invention, a first engaging portion for engaging so as to restrict movement along the front bezel that is attached to the front in the moving direction of the tray, the first locking portion Since the second locking portion that locks so as to restrict movement in the unlocking direction is provided, the front bezel can be reliably prevented from falling off even when a force acts in the direction in which the front bezel is pulled out.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a conventional disk device.
FIG. 2 is a plan view showing an embodiment of a disk device according to the present invention.
FIG. 3 is a plan view showing a state in which the tray is inserted into the disk loading position.
FIG. 4 is a perspective view showing a state in which a tray is inserted into a disk loading position.
5 is a longitudinal sectional view showing the height relationship between the tray 20 and the low friction member 25. FIG.
6 is a bottom view for explaining the mounting structure of the front bezel 30. FIG.
7 is a bottom view of the front bezel 30. FIG.
FIG. 8 is an exploded perspective view for explaining an operation process for attaching the front bezel to the tray.
FIG. 9 is an enlarged bottom view showing a work procedure when the front bezel is attached to the tray.
FIG. 10 is an enlarged bottom view showing a state in which the front bezel is attached to the tray.
[Explanation of symbols]
11 Disc device 16 Frame 16a Overhang portion 18 Turntable 20 Tray 22 Optical disc 24 Disc storage portion 25 Low friction member 26 Optical pickup 30 Front bezel 30a Hook 30b Recess 30c Projection 32 Eject button 44 L-shaped projection 46 Stopper

Claims (4)

A tray having a turntable on which a disk-shaped recording medium is mounted, and a tray formed to have a width smaller than the diameter of the disk-shaped recording medium;
The tray is supported so as to move to a disk replacement position for replacing the disk-shaped recording medium or a disk mounting position for housing the disk-shaped recording medium, and when the tray moves to the disk mounting position, A frame having a projecting portion projecting so as to face the disc-shaped recording medium projecting to the side;
In a disk device comprising:
When the tray is moved to the disc mounting position , a low friction member is formed on at least a region of the projecting portion facing the disc-shaped recording medium, and the upper surface of the low friction member is more than the disc storage portion of the tray. A disk device characterized by being expensive . 2. The disk device according to claim 1 , wherein the low friction member is coated on the entire surface of the projecting portion facing the disk-shaped recording medium . 3. The disk device according to claim 1, wherein a corner portion of the tray formed at a boundary between the tray and the projecting portion has an R shape or a chamfered shape . The tray includes a first locking portion that locks a front bezel attached to the front surface so as to restrict movement along the moving direction of the tray, and movement of the first locking portion in the unlocking direction. 4. The disk device according to claim 1, further comprising a second locking portion that locks so as to be regulated.

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