JPH0620367A - Disk holding device - Google Patents

Abstract

PURPOSE:To provide a disk holding system capable of fitting plural disks different from each other in a holding form on a disk driving device. CONSTITUTION:Centering is carried out with a centering member 4 having a tapered surface 5 corresponding to the periphery of the central hole 2 in an optical disk as a 1st disk 1A. In the case of a magneto-optical disk as a 2nd disk 1B different from the 1st disk 1A in holding form, centering is carried out with an engaging member 7 engaged with the central hole 6 in the 2nd disk 1B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk holding device for positioning different kinds of disks on a disk drive.

[0002]

2. Description of the Related Art Conventionally, in order to mount a CD (compact disc) or the like on a disc drive, the disc is loaded and positioned on a disc table, and the CD is rotationally driven.

In the case of a magneto-optical disk capable of recording and reproducing, the disk is housed in a cartridge, brought to the disk drive position by the same loading mechanism, and positioned on the disk table to rotationally drive the magneto-optical disk. It is configured to let.

The loading mechanism is configured to move a disk or cartridge holder (hereinafter referred to as a holder) configured to hold a CD or disk cartridge by using a cam or the like. First, the disk or cartridge is driven. Move the device so that it is parallel to the chassis where the device is installed. Further, when the disk or the cartridge is brought to a position directly above the disk drive, the disk or the cartridge is moved in a direction perpendicular to the chassis (downward) in a direction approaching the chassis.

A spindle motor which constitutes a disk drive device is arranged on a chassis, a disk table is arranged on the spindle, and the position of the disk or the disk in the cartridge with the disk or cartridge placed on the disk table. Delivering is done.

This positioning is performed by a collet or the like having a taper portion which is inscribed in a central hole of 15 mm in the disk of a CD or the like.

On the other hand, a MO disk for recording and reproducing, which has a higher density than that of a CD or the like, has a magneto-optical disk rotatably housed in a cartridge. Magneto-optical disk
The disk substrate is made of a transparent material such as synthetic resin, and the signal recording layer made of a magnetic material is formed on one main surface of the disk substrate. A hub hole of 13 mm is provided at the center of this disc. A disc hub for attaching the disc to a disc table of a recording and / or reproducing disc drive is attached to the hub hole. This disc hub is formed of a metal or the like into a substantially disc shape, and is substantially concentric with the disc.
It is attached to the disc by means such as adhesion or welding. At the center of the disc hub, a central hole of 4φ mm is bored, the center of which coincides with the center of curvature of a recording track which is formed in a concentric shape and is spirally formed on the signal recording layer.

[0008]

DISCLOSURE OF THE INVENTION CD having the above-mentioned conventional structure
And a disc drive for recording and / or reproducing different types of optical discs such as MO discs have two different types of discs depending on the disc drive of the same type because the disc chucking method as well as the center hole diameter is completely different. However, there is a problem that it is impossible to reproduce and / or record the data, and separate disk holding devices must be configured.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a disk holding device capable of driving an optical disk such as a CD and an MO with the same disk drive mechanism. It is something to try.

[0010]

DISCLOSURE OF THE INVENTION The disk holding device of the present invention has disks 1A and 1A as shown in FIG.
In the disk holding device configured to position the disk on the disk table 8 by the disk positioning operation of B, the taper surface 5 corresponding to the outer periphery of the center hole 2 of the first disk 1A is used during the disk positioning operation. A centering member 4 for centering, a positioning engagement member 7 that engages with the center hole 6 of the second disc 1B during the disc positioning operation, and a holding member 9 that holds the centering member 4 on the disc table 8 are provided. The disks 1A and 1B having different first and second center holes 2 and 6 can be appropriately positioned.

[0011]

According to the present invention, an optical disk such as a CD and an MO
It is possible to obtain a disc holding device capable of chucking a disc with a magneto-optical disc as described above on one disc drive device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The disk holding device of the present invention will be described below in detail with reference to the drawings.

FIGS. 1A and 1B are side sectional views of the essential parts showing a state in which an optical disk 1A such as a CD and a magneto-optical disk 1B such as an MO are positioned and held on a disk table by the disk holding device of the present invention. It is shown.

1A and 1B, common portions are given the same reference numerals, and the loading mechanism will be described with reference to FIGS. 2A and 2B before proceeding with the description.

Various loading methods for placing the disk and the disk cartridge on the disk table 8 arranged on the spindle of the spindle motor of the disk drive unit, chucking them after positioning and rotating the disk are available. For example, the most widely used method is to lower the loading mechanism downward to bring the disc onto the disc table 8 when it comes to a position directly above the disc driving device at the time of loading, as in the conventional configuration. It is to hold it.

In the present embodiment, any kind of loading mechanism may be used, but for example, as shown in FIGS. 2A and 2B, the centering member (collet) 4 lowering method related to the opening and closing of the door is used. It may be.

2A and 2B, a spindle motor 51 for driving a disk is provided in a housing 50 of the disk drive device, and the disk table 8 is rotatably arranged on a spindle 52 of the spindle motor 51. As shown in FIG. 2, the disc 1A is loaded from the disc insertion opening 54 provided in the panel 53 arranged in front of the housing 50 so that the center hole 2A of the optical disc 1A is brought onto the disc table 8.

Next, the collet 4 is rotatably attached to the lever 15 rotatably attached to the housing 50 by the pivot 55, and the tip of the lever 15 is associated with the door opening / closing knob 58 of the panel 53. By closing the door opening / closing knob 58 as shown by arrow A in FIG. 2B, the disc insertion opening 54 can be closed and the taper surface 5 of the collet 4 can position the optical disc 1A.

As shown in FIGS. 1A and 1B, the shaft 10 is fixed to the lever 15 that moves up and down in conjunction with the operation of the loading mechanism as described above. An annular convex portion 16 is provided on the lever 15 concentrically with the shaft 10 to serve as a seat for one end of the coil spring 11.

On the side opposite to the fixed end of the lever 15 of the shaft 10, the other end of the coil spring 11 is received, and the bearing and the bearing member which are concentric with the shaft 10 and serve as the bearing portion of the centering member (collet) 4. Fix 13

The collet 4 serving as the centering member is formed in a substantially flat columnar shape, and a taper surface 5 is formed on the outer periphery of the lower end thereof, and the predetermined position of the taper surface 5 is an optical disk 1 such as a CD.
A value is selected from a range smaller than the diameter of the central hole 2 of A (15 mm) to a large range. (For example, 11φ to 18
φ)

Further, the bottom surface of the collet 4 is provided with a hole 14 for fitting a protrusion serving as the engaging portion 7 from the disc table 8.

Further, a counterbore 17 is provided on the upper surface of the collet 4.
The shaft 10, the seat and the bearing member 13 are arranged at the center position of the counterbore 17, and the bearing 12 is press-fitted into the counterbore to freely rotate the collet 4 with respect to the shaft 10. Is composed of.

On the upper surface of the disc table 8 on which the disc 1A or the magneto-optical disc 1B is placed, there is formed a circular counterbore 18 into which a disc hub 19 of the magneto-optical disc 1B, which will be described later, is fitted, and a collet is formed. A holding member 9 such as a magnet for adsorbing and holding is embedded in the counterbore hole 18.

FIG. 1B shows a disk holding device M as described above.
A magneto-optical disk such as O is mounted and held.
In this case, the hub hole 3 of the magneto-optical disk 1B has a diameter of 13
The diameter φmm is about 0.3 mm, and the disc hub 19 joined to the lower surface of the hub hole 13 is made of a metallic plate material and has a diameter smaller than the diameter of the counterbore hole 18, and the engaging portion 7 is The central hole 6 formed at the center of the disk hub 19 into which the protrusions to be formed fit is 0.5 mm to 1 mm around the central hole 6.
A rising edge 20 of about mm is formed, and a counterbore 21 into which the rising green 20 is shallowly fitted is also provided around the hole formed at the center of the collet 4.

With the above-mentioned structure, as shown in FIG. 1A, the lever 15 is lowered while the optical disk 1A such as a CD is placed on the disk table 8, and the taper surface 5 of the collet 4 is moved.
When the inner circumference of the center hole 1A of the optical disk 1A is in contact with the inner surface of the optical disk 1A and is pushed by the tapered surface 5 to move the optical disk 1A in the left-right direction to center the optical disk 1A, the engaging portion 7 on the disk table 8 causes the collet 4 to move. The optical disc is chucked with high precision by fitting it into the hole drilled at the center position.

The collet 4 is pressed against the upper surface (reference surface) of the disk table 8 by the spring 11 and is fixed and held more firmly by the magnet of the holding member 9 if the collet 4 is a magnetic material.

If the spindle motor is rotated in this state, the disc table 8 and the optical disc 1A will move to the collet 4.
At the same time, the seat and the bearing member 13 are rotated through the bearing 12 with the fixed point.

Next, when the magneto-optical disk 1B such as MO is mounted on the disk holding device having the same structure as that of FIG. 1A shown in FIG. 1B, the taper surface 5 of the collet 4 and the magneto-optical disk 1 are used.
The magneto-optical disk 1B is brought into contact with the inner circumference of B, moves in the left-right direction pressed by the tapered surface 5 and is centered, and the disk hub 18 formed on the upper surface of the disk table 8 is formed.
The disc hub 19 fits in the inside of the collet 4, and the protrusion of the engaging portion 7 fits into the hole 14 formed in the bottom surface of the collet 4 for more accurate positioning.

Further, the rising edge 2 of the disk hub 19
0 is a counterbore 2 provided shallowly around the hole 14 of the collet 4.
1B and the inner circumference of the hub hole 3 of the magneto-optical disc 1B in order to move the collet 4 upward at the tip of the rising edge 20 against the biasing force of the spring 11. The disk hub 19 made of a magnetic material is rotated without contact with the upper surface (reference surface) of the disk table 8 by the holding member 9 of the magnet.

In the above-described embodiment, the hole 14 is formed in the collet 4, the protrusion as the engaging portion 7 is formed in the disc table 8, and the protrusion is fitted into the hole 14 to position the disc. As shown in FIGS. 3A and 3B, it is clear that the collet 4 may be formed with a protrusion as the engaging portion 7 at the center of the bottom surface thereof, and the disc table 8 side may be provided with a hole 14 for fitting with the engaging portion 7. Is.

The collet 4 may be composed of a magnet or the like,
By constructing the magnet on the bottom surface of the collet 4, it is possible to form the holding member 9 in which the magnet on the disk table 4 side is unnecessary.

Further, the collet 4 may be made of an elastic material such as rubber and the coil spring 11 and the like may be omitted. With this configuration, the disc can be held more softly.

Although the magneto-optical disk 1B is placed directly on the disk table 8 in the above-mentioned configuration example, when the magneto-optical disk rotatably housed in the cartridge is loaded, the magneto-optical disk 1B is previously positioned on the bottom surface of the cartridge. It is obvious that the magneto-optical disk 1B in the cartridge may be positioned on the disk table 8 by taking it out.

Since the present invention is constructed as described above, the CD
It is possible to obtain a disc holding device capable of driving an optical disc such as the above and a magneto-optical disc such as the MO with one disc driving device.

[0036]

According to the disk holding device of the present invention, it is possible to obtain one which can drive two disks having different disk holding types by one disk driving device.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing an embodiment of a disk holding device of the present invention.

FIG. 2 is a schematic diagram illustrating a loading method applicable to the disc holding device of the present invention.

FIG. 3 is a side sectional view of an essential part showing another embodiment of the disk holding device of the present invention.

[Explanation of symbols]

 1A Optical disk (CD) 1B Magneto-optical disk (MO) 2,6 Central hole 5 Tapered surface 7 Engaging portion 8 Disk table

Claims (5)

[Claims] 1. A disk holding device configured to position a disk on a disk table by a disk positioning operation of the disk, wherein a taper corresponding to the outer periphery of the center hole of the first disk during the disk positioning operation. A centering member for centering the surface, a positioning engagement member that engages with the center hole of the second disk during the disk positioning operation, and a holding member that holds the centering member on the disk table, A disk holding device characterized in that disks having different first and second center holes can be appropriately positioned. 2. The disc holding device according to claim 1, wherein a protrusion that engages with the center hole of the second disc is provided at the center of the centering member. 3. A center portion of the centering member is formed with a concave portion into which a protrusion protruding from above the disc table is inserted and inserted through a center hole of the second disc. Disk holding device. 4. The disk holding device according to claim 1, wherein the centering member is made of an elastic member. 5. The disk holding device according to claim 1, wherein a magnet is arranged on the disk turntable.