JPH076468A - Disk drive - Google Patents

Abstract

(57) [Abstract] [Purpose] In a disk drive device for driving a disk-shaped recording medium such as a floppy disk or an optical disk,
Achieve a thinner device. [Structure] An optical disk having a structure in which a protrusion for determining a disk center position provided on a rotating turntable 12 on which an optical disk 11 is mounted is drawn from a disk mounting portion 12a of the turntable 12 by a leaf spring.
At the time of inserting or ejecting the optical disc 11, the optical disc 11 and the turntable 12 are provided by the amount (p) of the protrusion 12b being pulled in.
Since the distance between and can be made small (where q was p + q in the past), the overall thickness of the device can be reduced.

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 driving a disk-shaped recording medium such as a floppy disk or an optical disk.

[0002]

2. Description of the Related Art In recent years, disk drives have been strongly required to be small and thin in order to be mounted on small portable equipment such as notebook personal computers and note word processors. The conventional optical disk drive will be described below. FIG. 7 shows an overall plan view of a conventional optical disk drive,
It shows a state where an optical disc is being inserted into the device.
FIG. 8 is a side view of FIG. 7. In FIGS. 7 and 8, 31 is a main body of the apparatus, 32 is an optical disk which is an information recording medium, and a centering hole 32a is provided in the center. The optical disc 32 has an opening 31a provided in the main body 31.
From the inside to the inside of the device and discharged from the inside of the device. Reference numeral 33 denotes a turntable on which the optical disc 32 is mounted and rotated, and a protrusion 34 made of a ferromagnetic material is provided in the center to fit the hole 32a of the optical disc 32 to center the optical disc 32. Reference numeral 35 is a spindle motor that drives the turntable 33, and 36 is an attraction plate provided with a magnet, which sandwiches the optical disc 32 between the protrusion 34 and the optical disc 32. 37
Is an optical head for reading information from the optical disc 32,
A lens 38 is provided on the optical head 37 and focuses the laser light on the optical disc 32. The optical head 37 is an actuator for moving the lens 38 in the optical axis direction (focus direction) of the lens 38 and in the radial direction (track direction) of the optical disc 32 as the information track on the optical disc 32 is displaced.
(Not shown). Reference numeral 39 is a guide shaft that guides the optical head 37 movably in the track direction. The optical head 37 is driven in the track direction by a drive source (not shown), and can access a desired information track on the optical disc 32.

The operation of the disk drive device constructed as described above will be described below. First, in FIG. 8, the optical disc 32 is inserted into the inside of the apparatus through a guide (not shown) through the opening 31a of the main body 31. At this time, the protrusion 34 and the suction plate 36 are arranged with a distance q so as not to contact the optical disc 32, and the distance L between the optical disc 32 and the turntable 33 is the protrusion amount p of the protrusion 34. Then, L = p + q.
Further, when the optical disk 32 comes to the position where the rotation axis of the optical disk 32 and the rotation axis of the turntable 33 are substantially aligned with each other on the protrusion 34 (FIG. 9), the suction plate 36 and the optical disk 32 are turnedtable by a mechanism (not shown). Descend in the direction of 33,
As shown in, the optical disc 32 is mounted on the turntable 33 by the magnetic attraction force of the attraction plate 36 and the protrusion 34, and is rotationally driven by the spindle motor 35. After that, the optical head 37 moves to a desired track position on the optical disc 32 along the guide shaft 39, and laser light is emitted from the lens 38 to reproduce information. In the case of ejecting the optical disc 32, the above operations are sequentially performed in reverse.

[0004]

However, in the above-mentioned conventional configuration, the protrusion 34 projects from the turntable 33 by p, and the optical disc 32 is inserted into this protrusion when the optical disc 32 is inserted or ejected. The distance q must be set so that they do not come into contact with each other, which hinders the thinning of the device. The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a thin disk drive device.

[0005]

In order to achieve the above object, the disk drive device of the present invention is provided with a protrusion for determining the center position of the disk, which protrudes from the disk mounting surface of a turntable on which a disk as a recording medium is mounted. It is configured to be pulled in from the disc mounting surface.

[0006]

Therefore, with this configuration, when the optical disc is inserted or ejected, the distance between the optical disc and the turntable can be reduced by the amount of the protrusion, so that the overall thickness of the device can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the main configuration of a disk drive device according to an embodiment of the present invention. In FIG. 1, 10 is a main body of the apparatus, 10a is an opening, 11 is an optical disk which is an information recording medium, and a centering hole 11a is provided in the center. 12 this optical disc 1
A turntable which is mounted with 1 and rotates, and a spindle motor 13 which drives the turntable 12.

The details of the turntable will be described with reference to the exploded views of FIGS. The turntable 12 includes a disc mounting portion 12a, a protrusion 12b, and a leaf spring 12c. The protrusion 12b made of a ferromagnetic material fits into the disc mounting portion 12a and is slidable in the axial direction. There is. Disc mounting part 12
From the back side of a, a leaf spring 12c
The other end is fixed to the projection 12b, and the projection 12b is urged in the direction of being drawn into the disk mounting portion 12a. As a result, the disk mounting portion 12a, the protruding portion 12b, and the leaf spring 12c integrally configure the turntable 12. Figure 6 (a)
Shows a state in which the protrusion 12b projects from the disc mounting portion 12a, and FIG. 6B shows a state in which the protrusion 12b is retracted.

Returning to FIG. 1, 14 is a suction plate provided with a magnet, 15 is an optical head for reading information from the optical disk 11, 16 is provided on the optical head 15, and a laser beam is focused on the optical disk 11. It is a lens that does. Optical head 15 is a lens
An actuator (not shown) for moving the lens 16 in the optical axis direction of the lens 16 (focus direction) and in the radial direction of the optical disk 11 (track direction) along with the displacement of the information track on the optical disk 11 is provided. The optical head 15 is movably guided in the track direction and is driven in the track direction by a driving source (not shown) so that a desired information track on the optical disk 11 can be accessed.

The operation of the disk drive device configured as described above will be described with reference to FIGS. 1, 2 and 3. First, in FIG. 1, the optical disc 11 is inserted into the inside of the apparatus through a guide (not shown) through the opening 10a of the main body 10. At this time, since the protrusion 12b does not project from the turntable 12, the optical disk 11 is arranged with a distance q so as not to contact the turntable 12 and the suction plate 14. That is, the optical disk 11
The distance L between the turntable 12 and the turntable 12 is L = p + q in the conventional example.
Therefore, in this embodiment, L = q, and the protrusion amount p of the conventional protrusion 34 is reduced. Optical disc 11
When the optical disk 11 comes to a position where the rotation axis of the optical disk 11 and the rotation axis of the turntable 12 are substantially aligned (FIG. 2), the suction plate 14 and the optical disk 11 are turned by the mechanism (not shown).
The magnetic attraction force between the attraction plate 14 and the protrusion 12b increases as the attraction plate 14 and the protrusion 12b approach each other, and the protrusion 12b protrudes from the disc mounting portion 12a as shown in FIG. 11 is centered by a protrusion 12b, is held by being sandwiched between a suction plate 14 and a disk mounting portion 12a, and is rotationally driven by a spindle motor 13. After that, the optical head 15 moves to a desired track position on the optical disc 11, and laser light is emitted from the lens 16 to reproduce information. When the optical disk 11 is ejected, the above operation is sequentially performed in reverse. That is, the optical disk 11 of FIG.
From the state where it is mounted on the turntable 12
11 and the suction plate 14 are lifted by a mechanism (not shown), and when the suction plate 14 is separated from the protrusion 12b, the magnetic attraction force between the two is reduced, and the protrusion 12b is drawn into the disk mounting portion 12a (Fig. 2) After that, the optical disk 11 is ejected from the main body through the opening 10a (FIG. 1).

As described above, according to the present embodiment, the turntable 1 is provided with the protrusion 12b for determining the center position of the disc provided on the rotating turntable 12 on which the optical disc 11 is mounted.
By having a configuration in which the second disc mounting portion 12a is pulled by the leaf spring 12c, when the optical disc 11 is inserted,
Alternatively, at the time of ejection, the distance L between the optical disk 11 and the turntable 12 can be reduced by the amount by which the protrusion 12b is pulled in, so the overall thickness of the device can be reduced.

[0012]

As described above, according to the present invention, the protrusion which determines the center position of the disc, which is mounted on the disc serving as the recording medium and which rotates from the disc mounting face of the rotating turntable, protrudes from the disc mounting face of the turntable. Since the protrusion that determines the disc center position is drawn in from the disc mounting surface of the turntable, the distance between the optical disc and the turntable can be reduced by the amount of the protrusion when the optical disc is inserted or ejected. Therefore, there is an effect that it is possible to realize an excellent disk drive device capable of reducing the thickness of the entire device.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of a disk drive device according to an embodiment of the present invention.

FIG. 2 is an overall configuration diagram for explaining an operation of a disk drive device according to an embodiment of the present invention.

FIG. 3 is an overall configuration diagram for explaining an operation of a disk drive device according to an embodiment of the present invention.

FIG. 4 is an exploded perspective view of essential parts of a disk drive device according to an embodiment of the present invention.

FIG. 5 is an exploded perspective view of essential parts of a disk drive device according to an embodiment of the present invention.

FIG. 6 is a perspective view of a main part of a disk drive device according to an embodiment of the present invention.

FIG. 7 is an overall plan view of a conventional disk drive device.

FIG. 8 is a configuration diagram of a main part of a conventional disk drive device.

FIG. 9 is an overall configuration diagram for explaining the operation of a conventional disk drive device.

FIG. 10 is an overall configuration diagram for explaining the operation of a conventional disk drive device.

[Explanation of symbols]

10, 31 ... Main body, 10a, 31a ... Opening part, 11, 32 ... Optical disk, 11a, 32a ... Hole, 12, 33 ... Turntable, 12
a ... Disk mounting part, 12b, 34 ... Projection part, 12c ... Leaf spring, 13, 35 ... Spindle motor, 14, 36 ... Adsorption plate,
15, 37 ... Optical head, 16, 38 ... Lens.

Claims (1)

[Claims] 1. A head for reproducing information from a disk which is a recording medium, a turntable for mounting the disk,
A disc drive device, comprising: a protrusion provided on the turntable for determining a disc center position; and a spindle motor for driving the turntable, wherein the protrusion is pulled in from a disc mounting surface of the turntable.