JPH117688A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk device capable of accurately performing the chucking operation. SOLUTION: The chucking operation is executed by making a drive chassis 18 to attach/detach against a main chassis (tray 14) while taking one end as the fulcrum. Then, the device is constituted so that a center (O') of the disk 12 on the tray 14 is put on the locus (L) drawn by a center (O) of a turntable 32 (projected part 32a). That is, when the projected part 32a of the turntable 32 is fitted into a center hole 12a of the disk 12 on the tray 14, the center (O) of the turntable 32 (projected part 32a) is made so as to coincide with the center (O') of the disk 12. Thus, the projected part 32a of the turntable 32 is surely fitted into the center hole 12a of the disk 12. The chucking operation is surely performed accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive,
In particular, the present invention relates to a disk device that performs a chucking operation by, for example, moving a drive chassis provided with a turntable toward and away from a main chassis with one end as a fulcrum.

[0002]

2. Description of the Related Art An example of such a conventional disk drive is shown in FIGS. In the disk drive 1, one end of a drive chassis 4 that supports a turntable 3 whose rotation speed is controlled by a disk motor 2 is fixed to a main chassis 6 by a fixture 5 such as a bolt, and a disk placed on a tray 8 When chucking the drive 7, the drive chassis 4 is rotated so that the other end of the drive chassis 4 approaches the main chassis 6. That is, when the tray 8 (disk 7) is inserted to a predetermined position, as shown in FIG. 4, the drive chassis 4 swings (rotates) with one end serving as a fulcrum, and is rotatably substantially fixed to the main chassis 6. The holding member (chuck disk) 9 provided on the tray 8 and the turntable 3 are magnetically joined to chuck the disk 7 on the tray 8.

[0003]

In the prior art, the center (O) of the turntable 3 is clearly understood from FIG.
Is displaced so as to draw an arc as shown by an arrow. At the position where the turntable 3 is joined to the holding member 9, the center (O) of the turntable 3 and the disc 7 on the tray 8 are moved.
(O ') are designed to be on the same vertical line (L'). Therefore, when the projection 3a of the turntable 3 engages with the center hole 7a of the disk 7, a shift occurs between the center (O ') of the disk 7 on the tray 8 and the center (O) of the turntable 3. I do. As a result, there is a problem that the protrusion 3a sometimes comes into contact with the disk 7 and the disk 7 cannot be chucked accurately. Conventionally, in order to solve this problem, the convex portion 3a is formed in a tapered shape so that the outer peripheral surface of the convex portion 3a becomes smaller in diameter as it goes upward, so that the convex portion 3a can easily engage with the center hole 7a of the disk 7. However, this problem has not yet been completely solved.

[0004] Therefore, a main object of the present invention is to provide a disk drive capable of accurately performing a chucking operation.

[0005]

According to the present invention, there is provided a drive chassis having a turntable provided on an upper surface thereof and having one end serving as a fulcrum, which is connected to and separated from a main chassis, and a tray on which a disk is mounted on the upper surface to be taken in and out of the main chassis. A disk device that chucks a disk by rotating the drive chassis with one end serving as a fulcrum when the tray is inserted to a predetermined position, the center of the disk placed on the tray inserted to the predetermined position A disk device characterized by being arranged on a locus drawn by the center of a turntable.

[0006]

[Function] The center (O ') of the disc placed on the tray is
The center (O) of the turntable is configured to be placed on a locus drawn. That is, when the disc on the tray and the turntable are engaged, the center (O ') of the disc and the center (O) of the turntable coincide. Therefore, the disc on the tray is guided to a predetermined chucking position by the displacement operation of the turntable, and is accurately chucked.

[0007]

According to the present invention, the center (O ') of the disk on the tray and the center (O) of the turntable can be matched, so that the disk on the tray is chucked accurately. Also, when the chucking state is released (off), the disc can be placed at a predetermined desired position on the tray.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

Referring to FIGS. 1 and 2, a disk device 10 of this embodiment has a tray 14 on which a 12 cm or 8 cm disk 12 is placed, and a
4 includes a main chassis 16 that supports the main chassis 4 so that the main chassis 4 can be taken in and out, and a drive chassis 18 that is provided so that one end is a fulcrum and the other end is in contact with or separated from the main chassis 16.

[0010] Ribs 20a and 20b are formed on the upper surface of the tray 14 in correspondence with the disks 12, respectively. A disk of, for example, 12 cm is engaged with the rib 20a, and a disk of, for example, 8 cm is engaged with the rib 20b. Also,
At a substantially center of the tray 14, a substantially rectangular window 22 is formed.
Through this window 22, the recording surface (reflection surface) of the disk 12 placed on the tray 14 is read by the pickup 24 on the drive chassis 18. Then, a rack gear (not shown) provided on the lower surface (back surface) of the tray 14 and extending in the insertion / removal direction of the tray 14 meshes with a gear 26 provided on the main chassis 16 and driven by a motor (not shown). 14 is allowed in and out.

The main chassis 16 includes the disk device 10.
And a window 28 having substantially the same shape as the drive chassis 18 in a plan view and having a slightly larger area than the drive chassis 18 is formed substantially in the center thereof. A holding member (chuck disk) 30 is provided above the window 28 so as to be rotatable and substantially fixed. Then, the turntable 32 whose rotation speed is controlled by the disc motor 36 is magnetically joined to the pressing member 30, so that the disc 12 on the tray 14 is chucked.

That is, one end of the drive chassis 18 is rotatably connected to the main chassis 16 by a fixing member 34 such as a bolt, and the other end, that is, the side on which the turntable 32 is provided, is provided with one end of the drive chassis 18 as a fulcrum. It swings (rotates) so as to approach the chassis 16. Then, the convex portion 32a of the turntable 32 fits into the center hole 12a of the disk 12 on the tray 14, and
The disc 12 is separated from the tray 14 by the displacement operation of the turntable 32 (drive chassis 18). Then, the disc 1 guided to a predetermined chucking position
2 is held by the turntable 32 and the holding member 30. That is, it is chucked.

In this embodiment, the center (O ') of the disk 12 on the tray 14 is placed on the locus (L) drawn by the center (O) of the turntable 32.
That is, in the disk device 10 that rotates the drive chassis 18 with one end as a fulcrum, the center (O) of the turntable 32 (convex portion 32a) is displaced in an arc as shown in FIG. When the projection 32a of the turntable 32 is fitted (engaged) with the center hole 12a of the disk 12 on the disk 14, the center (O) of the turntable 32 (projection 32a) and the center of the disk 12 on the tray 14 ( O ')
Are configured to match. As a result, the projection 32a of the turntable 32 is
Can be fitted accurately.

Means for arranging the center (O ') of the disk 12 on the tray 14 on the locus (L) of the center (O) of the turntable 32 includes, for example, the tray 1
4. The ribs 20a and 20b for positioning the disk 12 on 4 are formed so as to satisfy the components.
Alternatively, it is conceivable that the ribs 20a and 20b are made conventional and the position of the turntable 32 (disk motor 36) is moved.

In operation, a disc 12 to be reproduced is placed on a tray 14 pulled out of the main chassis 16, and when the tray 14 is inserted to a predetermined position, a cam or a link mechanism (not shown) drives one end as a fulcrum. The other end of the chassis 18, that is, the side on which the turntable 32 is provided, is displaced in a direction approaching the main chassis 16 (tray 14). As described above, the center (O ′) of the disk 12 on the tray 14 is positioned on the locus (L) drawn by the center (O) of the turntable 32 (convex portion 32a).
2 accurately fits into the center hole 12a of the disk 12, and the turntable 32 (drive chassis 18)
The disk 12 is guided to a predetermined chucking position by the displacement operation of. And it is chucked by the holding member 30 and the turntable 32. Similarly, when the chucking state is released (off), the center (O) of the turntable 32 (convex portion 32a) follows the locus (L). 20a (or 20b) can be reliably engaged.

According to this embodiment, the center (O ') of the disk 12 on the tray 14 is arranged on the locus (L) drawn by the center (O) of the turntable 32, and the center of the disk 12 on the tray 14 is Since (O ') is made to coincide with the center (O) of the turntable 32, the chucking operation is performed accurately. Therefore, turntable 3
When the chucking error occurs because the disk 12 is not correctly placed on the disk 2 or when the disk is chucked off, the disk 12 is returned to the tray 14 in a state of being displaced, so that the tray 14 cannot be pulled out from the main chassis 16. Such problems are completely eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the embodiment in FIG. 1;

FIG. 3 is a side view of a disk device that rotates a drive chassis with one end serving as a fulcrum.

FIG. 4 is an enlarged view of a main part showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Disk apparatus 12 ... Disk 14 ... Tray 16 ... Main chassis 18 ... Drive chassis 20a, 20b ... Rib 32 ... Turn table 32a ... Protrusion L ... Track O ... Center of a turn table O '... Center of the disk on a tray

Claims (1)

[Claims] 1. A drive chassis having a turntable provided on an upper surface thereof and having one end serving as a fulcrum, and a drive chassis, and a tray on which a disk is mounted and which is inserted into and removed from the main chassis. In a disk device for chucking the disk by rotating the drive chassis around the one end when the disk is inserted to a predetermined position, the center of the disk placed on the tray inserted to the predetermined position A disk device characterized by being arranged on a locus drawn by the center of the turntable.