JP2532148Y2 - Disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device for rotating a disk such as an optical disk device, a magneto-optical disk device, a CD device, a magnetic disk device and the like, and more particularly, to dust or dirt attached to a disk mounting surface of a turntable. The present invention relates to a disk drive capable of removing dust and the like.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing a conventional disk drive, and FIG. 4 is a plan view showing a disk mounting surface of a conventional turntable. The conventional disk drive shown in FIG. 3 is provided with a turntable 1 which is supported by a rotation shaft 2 of a drive motor M. The turntable 1 is entirely or partially formed of a magnet member, and is provided with a metal positioning portion 3 provided at the center of the recording / reproducing portion 4 of the disk D.
Is mounted and clamped on the mounting surface 1A by the magnetic force. Alternatively, in the case where the center of the disk D is pressed against the turntable 1 and clamped, a rotatable clamper K is attracted to the turntable with the center of the disk D interposed therebetween.

[0003]

SUMMARY OF THE INVENTION In the above disk drive, dust 5A is placed on the mounting surface 1A of the turntable 1.
If the disk D is mounted on the mounting surface 1A and clamped while the dust 5B or the like remains attached, dust 5A
Part of the disk D is brought into a non-contact state with the mounting surface 1A due to dust or the like 5B or the like, so that the support of the disk D becomes unstable or the disk D is inclined with respect to the mounting surface 1A of the turntable 1. Will be. Disk D in this state
Is rotated, the recording / reproducing unit 4 is deflected, the focus servo by the optical head is operated excessively, and the recording / reproducing accuracy is reduced.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a disk drive device in which dust and dirt are not trapped between a disk mounting surface of a turntable and a disk. It is assumed that.

[0005]

According to the present invention, there is provided a disk drive having a drive motor and a turntable which is supported by a rotating shaft of the drive motor and supports a center portion of the disk. A groove extending from the inside to the outside is formed on the mounting surface, and pre-rotation means for driving the drive motor and rotating the turntable in advance before the disk is mounted on the disk mounting surface is provided. It is characterized by the following.

[0006]

In the above-mentioned means, the drive motor is driven by the pre-rotation means before the disk is mounted, and the turntable is rotated, so that most of the dust and dirt adhered to the mounting surface are rotated by the rotational force of the turntable. Is ejected from the mounting surface to the outside. When the disc is placed on the mounting surface, the dust and dust that are not blown to the outside and remain on the mounting surface are moved by the sliding contact between the center positioning portion of the disk D and the mounting surface. Rubbed and dropped into the groove. Then, the dust and dust dropped into the grooves are blown toward the outer periphery of the turntable by an air flow generated by the rotational force of the drive motor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1A is a sectional view showing the disk drive device of the present invention, and FIG. 1B is a plan view showing a disk mounting surface of the turntable according to the present invention. In the disk drive device shown in FIG. 1A, for example, a turntable 11 pivotally supported by a rotary shaft 12 of a drive motor M such as a spindle motor, and a disk is mounted on a mounting surface 11A of the turntable 11. It comprises a pre-rotation means 16 for driving the drive motor M and rotating the turntable in advance. The turntable 11 is entirely or partially formed of a magnet member, and holds the metal positioning portion 13 of the disk D by magnetic force.

As shown in FIG. 1B, a plurality of grooves 15 extending from the inside to the outside and opening to the outer peripheral surface are formed on the mounting surface 11A of the disk D. In the embodiment shown in FIG.
5 are formed along the radial direction.
May be inclined with respect to the radial direction. The disk D is composed of the metal positioning portion 13 and a recording / reproducing portion 14 formed of a resin member or the like formed on the outer periphery thereof. Then, the metal positioning portion 13 is magnetically attracted to the mounting surface 11A of the turntable 11. In this case, depending on the device, the clamper K is not provided, and the disk D is clamped to the turntable 11 only by the magnetic attraction. In the case where the clamper K is provided, the clamper K and the turntable 11 are connected. The disk D is magnetically attracted, and the center of the disk D is clamped between the clamper K and the turntable 11.

Next, the operation of the disk drive having the above configuration will be described with reference to FIG. When the disc D is inserted from a disc insertion slot (not shown) and guided to the turntable 11 by a predetermined loading mechanism, the drive motor M is driven by the pre-rotation means 16 immediately before the disc D is set on the turntable 11, The turntable 11 is rotated. At this time, most of the dust, dust, and the like attached to the mounting surface 11A are blown out of the mounting surface 11A.

Further, the disk D is moved above the turntable 11 and the mounting surface 11 of the turntable 11 is moved.
It is gradually lowered in the direction of A. When the disk D comes into contact with the mounting surface 11A of the rotating turntable 11, dust and dust remaining on the mounting surface 11A are slid by the sliding operation of the disk D and the mounting surface 11A.
It is rubbed in 5. Then, the dust and dust dropped into the groove portion are blown out of the groove portion 15 toward the outer periphery of the turntable 11 by the airflow 17 (see FIG. 2) generated by the rotational force of the drive motor M.

Then, the positioning portion 13 of the disk D is completely clamped on the mounting surface 11A of the turntable 11. In the case where the clamper K is provided, before the disc D is completely clamped between the clamper K and the turntable 11, dust on the mounting surface 11A due to sliding of the turntable 11 and the disc D is removed. The dust is rubbed off. As a result, no dust or dust is caught between the disk D and the mounting surface 11A, so that the disk D is securely clamped, and the recording / reproducing unit 14 may run out during rotation of the disk. There is no adverse effect on the focus servo.

In the above embodiment, the turntable 11
Although the groove 15 having the same width is formed from the center to the outer periphery of the groove 15, the groove 15 may have a shape in which the width gradually increases toward the outer periphery.

[0013]

[Effect of the Invention] As described above, according to the present invention, it is possible to remove dust and dirt attached to the disk mounting surface of the turntable, and in particular, dust and the like are interposed between the turntable and the disk. This prevents the disk from running out.

[Brief description of the drawings]

1A is a cross-sectional view showing a disk drive device of the present invention, and FIG. 1B is a plan view showing a disk mounting surface of a turntable.

FIG. 2 is a partially enlarged view of a turntable showing a flow of air in a groove.

FIG. 3 is a sectional view showing a conventional disk drive.

FIG. 4 is a plan view showing a disk mounting surface of a conventional turntable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Turntable 12 Rotating shaft 13 Positioning part 14 Recording / reproducing part 15 Groove part 16 Pre-rotation means D Disk K Clamp M Drive motor

Claims (1)

(57) [Scope of request for utility model registration] 1. A disk drive device comprising: a drive motor; and a turntable that is supported by a rotation shaft of the drive motor and supports a disk center portion. A disk drive device provided with an extending groove, and a pre-rotation means for driving the drive motor to rotate the turntable in advance before the disk is mounted on the disk mounting surface; .