JP2004164688A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the damage of an optical disk by surely preventing the fall-off of the optical disk from a clamp head, which is mounted on a turntable. <P>SOLUTION: This disk drive is arranged so that a disk tray 1 mounting a recording medium (optical disk D) thereon is loaded/unloaded by forward/backward movement in a chassis case 7. In the relative positional relation between the chassis case 7 and the disk tray 1 in the standstill state while being loaded in the chassis case 7, a restricting member 13 is fixed on a top plate face of a cover chassis 9 confronted with the edge part position of a center hole of the recording medium (optical disk D) which is mounted on the turntable 3 of the disk tray 1. Thus, fall-off of the recording medium (optical disk D) from the clamp head 4 is prevented. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk drive for driving an optical disk such as a CD (Compact Disc) or a DVD (Digital Versatile Disk), which is widely used as a recording medium, and to prevent an optical disk mounted on a turntable of a disk tray from falling off. It was made.
[0002]
[Prior art]
2. Description of the Related Art Generally, a disc device for driving an optical disk is built in and integrated with an information device main body such as a personal computer (hereinafter, referred to as a personal computer) to record and reproduce information on and from the optical disk (for example, see Patent Document 1). . FIG. 7 shows the appearance of a notebook personal computer incorporating such a disk device. Usually, in this disk device, the disk tray 1 pops out by a switch operation or a command from the personal computer main body, and furthermore, the personal computer is not used. The user pulls out the disc tray 1 from the main body and unloads the disc tray 1 in the direction of arrow A in FIG. Then, the loading of the disc tray 1 loaded with the optical disc D is advanced in the direction of arrow B in the figure to put the disc tray 1 in the personal computer main body.
[0003]
FIG. 8 shows an external view of a disk drive which is particularly often used in a notebook type personal computer. As shown in FIG. 8, a turn fixed to a drive shaft of a spindle motor 2 disposed immediately below the center of a disk tray 1. A table 3 is provided, and a chuck hole 4a of a clamp head 4 formed integrally with the turntable 3 clamps a center hole of the optical disk D to transmit a rotational force. The head unit 5 mainly composed of an optical pickup moves in a radial direction in a slit 1a formed in the disk tray 1 to record and reproduce information on the optical disk D. The disk tray 1 configured as described above is configured to be supported by the guide rails 6 and fit in the chassis case 7. The surface of the disk tray 1 has a base 1b formed on the outer periphery, and a receiving portion 1c for the optical disk D is formed on the inner periphery surrounded by the base 1b.
[0004]
Next, a chassis case 7 molded of a light metal such as aluminum or magnesium is composed of a base chassis 8 and a cover chassis 9 as shown in FIG. 9, and the opening of the base chassis 8 is covered with the cover chassis 9 and screwed. An opening 9a is formed at the center of the top plate of the cover chassis 9, that is, at a position corresponding to the clamp head 4 when the disc tray 1 is loaded and stopped, and covers the opening 9a. The sealing film 10 is stuck. The portion where the sealing film 10 is adhered is a concave portion 9b corresponding to the thickness of the sealing film 10 so that the surfaces of the cover chassis 9 and the sealing film 10 are flush with each other. I have.
[0005]
With the configuration described above, the clamp head 4 is located immediately below the opening 9a. When the disk device is driven in this state, the optical disk D loaded on the turntable 3 rotates. Then, a negative pressure is generated by an air flow flowing from the center of rotation to the outer periphery due to the viscous resistance and centrifugal force of air on the surface of the optical disc D. In such a state, the center of the cover chassis 9 bends while being sucked, and there is a danger that the clamp head 4 will come into contact with the cover chassis 9. Such a problem is solved by increasing the gap to the stop film 10.
[0006]
[Patent Document 1]
Japanese Patent Application No. 2002-171604 [0007]
[Problems to be solved by the invention]
As shown in FIG. 10, the end of the center hole of the optical disc D is hooked on chuck claws 4 a arranged at a plurality of positions of the clamp head 4, and the optical disc D is clamped on the turntable 3. The stationary state is maintained while being pressed on the pad 11 being worn. The chuck claw 4a is constantly urged in the outer peripheral direction by a compression coil spring 12 built in the clamp head 4, and this urging force affects the strength of the holding state of the optical disc D.
[0008]
By the way, in the above-mentioned disk device configured to be thin, there has been a problem after the optical disk has been dropped from the clamp head. Particularly, in a disk device built in a notebook personal computer and a disk device arranged vertically in a main body of a personal computer, the probability of an accidental drop of an optical disk was high. FIG. 11 shows a state in which the optical disk D is dropped from the clamp head 4. When the optical disk D reaches the state shown in FIG. 11, the optical disk D enters the idle state in the disk tray 1 and rides on the outer peripheral edge 1 b. As a result, the data recording surface is damaged. In addition, if the disk tray is pulled out in such a state, a strong force is applied to the optical disk, which causes a large damage.
[0009]
The simplest method for preventing such an accident is to increase the spring force of the compression coil spring 12, but if the center hole of the optical disk is strongly clamped, the optical disk may be curved. Are known. Even if such a curvature is microscopic, it causes a reading error and a writing error on an optical disc on which data is recorded at a high density. When the compression coil spring 12 is made strong, the pressing force of the chuck claw 4a becomes strong, which causes many problems such as a decrease in operability in loading and unloading the optical disc and a decrease in durability of the chuck claw. .
[0010]
The present invention has been made in view of such a conventional problem, and has as its object to reliably prevent an optical disk mounted on a turntable from falling off from a clamp head, and to prevent damage to an optical disk beforehand. It was made.
[0011]
[Means for Solving the Problems]
Therefore, the invention according to claim 1 of the present invention is a disk device in which a disk tray loaded with a recording medium is moved forward / backward in a chassis case to load / unload the disk tray. In a relative positional relationship with the disk tray in a loaded and stationary state, a stop member is provided on a top plate surface of a cover chassis opposed to an edge position of a center hole of a recording medium mounted on a turntable of the disk tray. To prevent the recording medium from falling off the clamp head.
[0012]
According to a second aspect of the present invention, in the configuration of the first aspect, the top plate surface of the cover chassis opposed to the inner edge position of the center hole of the recording medium mounted on the turntable of the disc tray is provided. The stopping member is fixed.
[0013]
According to the third aspect of the present invention, in the configuration of the first aspect, the front surface of the cover chassis opposite to the edge of the center hole of the recording medium mounted on the turntable of the disk tray is provided with a disk tray front end. The upwardly inclined surface facing the side is adapted to fix the stopping member formed on the peripheral edge.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the same reference numerals are given to portions common to the conventional configuration, and description thereof will be omitted.
[0015]
FIG. 1 is a perspective view of a first embodiment of the present invention, in which a U-shaped restraining member 13 is provided with an adhesive on the back side of an opening 9 a formed in a recess 9 b of a cover chassis 9. It is fixed. The stop member 13 is fixed to the inner side of the opening 9a so that it does not hinder the approach path of the clamp head 4, so that the stop member 13 has a sufficient thickness close to the edge of the optical disk D. Can be. The material of the restraining member 13 is desirably a hard synthetic resin having sufficient lubrication on the surface.
[0016]
Since the first embodiment of the present invention is configured as described above, when the disc tray 1 is loaded and stopped in the chassis case 7, the stopping member 13 is moved to the center of the optical disc D as shown in FIG. It is in a state of being opposed to and approaching the edge on the back side of the hole. Therefore, even if the center hole of the optical disc D comes off the chuck claws 4a as shown in FIG. 3 due to an impact or the like, the edge of the optical disc D comes into contact with the stopping member 13 and the falling off from the clamp head 4 is prevented. Therefore, the optical disk D can be prevented from floating in the disk tray 1. Since the stopping member 13 is made of a material (synthetic resin or the like) having higher lubricity than the cover chassis 9, the edge of the center hole of the optical disc D may come into contact with the stopping member 13. Also, since the sliding contact resistance is small, it is possible to suppress a decrease in the rotation speed of the optical disc D.
[0017]
FIG. 4 is a perspective view of the second embodiment of the present invention in a state where the second embodiment of the present invention is applied. A ring-shaped stop member 14 having a hole 14a is fixed by an adhesive. As shown in FIG. 5, the stopping member 14 has a circumferentially-inclined inclined surface 14 b extending toward the outer periphery. Note that the inclined surface 14b may be formed at least on the periphery facing the direction of entry of the disc tray 1, and the entire periphery does not necessarily have to be the inclined surface. Further, as in the first embodiment, the material of the restraining member 14 in the second embodiment is desirably a hard synthetic resin having sufficient lubricity on the surface.
[0018]
Since the second embodiment of the present invention is configured as described above, when the disc tray 1 is loaded and stopped in the chassis case 7, the stopping member 14 is moved to the center of the optical disc D as shown in FIG. The hole is in a state of being opposed to and approaching the entire peripheral edge of the hole. Therefore, even if the center hole of the optical disk D is disengaged from the chuck claw 4a due to an impact or the like, the edge of the optical disk D abuts on the restraining member 14, and the optical disk D is prevented from dropping from the clamp head 4, and the disk tray It is possible to prevent the optical disk D from floating in the optical disk 1. According to the configuration of the second embodiment, since the inclined surface 14b is formed on the stopping member 14, the top of the clamp head 4 comes into contact with the stopping member 14 by, for example, an unsteady operation of the disc tray 1. Even if this occurs, the top of the clamp head 4 is guided downward by the inclined surface 14b, so that the operability of the disc tray 1 is not reduced.
[0019]
In the above description, the U-shaped stopping member having no inclined surface and the ring-shaped stopping member having the inclined surface have been described as the embodiments, but the U-shaped stopping member having the inclined surface is described. Alternatively, the intended object of the present invention can be achieved by using a ring-shaped stopping member that does not form an inclined surface. Further, in the case where the ring-shaped stopping member is adopted, by forming an inclined surface on an inner peripheral edge thereof, even when the clamp head may contact the stopping member when unloading. The inclined surface guides the clamp head to provide a cushioning function, so that the operability of the disc tray is not affected.
[0020]
【The invention's effect】
As described above in detail, according to the first aspect of the present invention, the stop member is fixed to the top plate surface of the cover chassis facing the edge position of the center hole of the recording medium. Dropping from the head can be prevented beforehand, and protection of the optical disk can be ensured.
[0021]
According to the second aspect of the present invention, since the stopping member is fixed to the top plate surface of the cover chassis facing the edge portion on the inner side of the center hole of the recording medium, the approach path of the clamp head is improved. Therefore, the stop member can be made as thick as possible, so that its surface can be made sufficiently close to the edge of the optical disk, and the optical disk can be prevented from falling off more effectively. Can be.
[0022]
Further, according to the third aspect of the present invention, the stop member is made to face the entire peripheral edge of the center hole of the optical disk. Even if it does, the function of the stopping member acts quickly, and it is possible to reliably prevent the optical disk from falling off.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a first embodiment of the present invention.
FIG. 2 is a sectional view showing the configuration of the first embodiment of the present invention.
FIG. 3 is a sectional view showing a state in which the configuration of the first embodiment of the present invention is functioning.
FIG. 4 is a perspective view showing an embodiment of a second embodiment of the present invention.
FIG. 5 is a sectional view of a stopping member employed in a second embodiment of the present invention.
FIG. 6 is a sectional view showing a configuration of a second exemplary embodiment of the present invention.
FIG. 7 is a perspective view showing the appearance of a notebook computer.
FIG. 8 is a perspective view showing the appearance of a conventional disk device.
FIG. 9 is a perspective view showing an assembled state of a conventional disk device.
FIG. 10 is a sectional view showing a configuration of a conventional disk device.
FIG. 11 is a cross-sectional view showing a state of failure of a conventional disk device.
[Explanation of symbols]
1 desk tray 2 spindle motor 3 turntable 4 clamp head 4a chuck jaws 5 Head unit 6 Guide rail 7 Chassis case 8 Base chassis 9 Cover chassis 10 Sealing film 11 ·······················································································································································

Claims (3)

A disk device in which a disk tray loaded with a recording medium is moved forward / backward in a chassis case to load / unload the disk tray.
A cover facing the edge of the center hole of the recording medium mounted on the turntable of the disk tray in a relative positional relationship between the chassis case and the disk tray loaded in the chassis case and stationary; A disk device, wherein a stop member is fixed to a top plate surface of a chassis to prevent a recording medium from falling off from a clamp head. 2. The disk device according to claim 1, wherein a stopping member is fixed to a top plate surface of the cover chassis facing an edge position on a deep side of the center hole of the recording medium mounted on the turntable of the disk tray. A stop member having a peripheral edge with an upward slope toward the front of the disk tray is fixed to the top surface of the cover chassis facing the edge of the center hole of the recording medium mounted on the turntable of the disk tray. 2. The disk drive according to claim 1, wherein:

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