JPS58108073A - Magnetic disk driver - Google Patents

Abstract

PURPOSE:To facilitate loading operation and to reduce the size of a driver itself, by integrally providing a clamper mechanism to a cassette holder which has complex motion in a cassette insertion direction and its orthogonal direction in said order. CONSTITUTION:Once a magnetic disk cassette 1 is loaded in the cassette holder 28, one end of a lever 36 abuts on a ceiling plate 38, and the reverse surface of a clamper 37 at the other end is set where it never prevents the insertion of the cassette 1. When the cassette 1 is further inserted, the cassette holder 28 moves while restricted by an L-shaped hole 31, thus completing the loading of a disk. Namely, one end of the lever 36 once the cassette holder 28 has transition from the movement in the insertion direction 10 to the movement in the axial direction orthogonal to it is separated completely from the ceiling plate 38 and the clamper 37 energized counteclockwise by a torsion spring 36' supportingly presses a disk hub 3 centered by a center boss 20, allowing integral rotation with a rotating spindle 19.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk drive device, and in particular to simplifying the loading operation of a built-in cassette such as a magnetic disk.
The present invention relates to a disk clamp mechanism suitable for downsizing the device body.

First, an example of a magnetic disk cassette according to the present invention will be briefly described.

Figures 1 (at and 1b) show a perspective view and a cross-sectional view of the magnetic disk cassette 1. In the figure, 2 shows a magnetic disk cassette 1 whose thickness is almost uniform over the entire surface (approximately 80μ thick), and a hard disk in the center. It is a magnetic disk with a disk tap 3, 4 is a center hole, 5 is a center window.
1 is a positioning hole that is engaged with a positioning engagement pin on the drive device main body side during final setting; 7 is an index window; 8 is a head cover into which a magnetic head is inserted; 9 is a storage case; 10 is an arrow indicating the direction of insertion into the main body of the drive device.

Next, FIG. 2(a) shows a conventional example of a drive device used in, for example, the above-described magnetic disk cassette 1.

This will be explained using the partially cross-sectional side view of (b). The same figure (I
I) shows a state in which the magnetic disk cassette 1 is about to be inserted into the drive device 11, and reference numeral 12 indicates the disk drive motor 131 positioning engagement pin 14. 15 is a plate-shaped cassette holding spring 16 which presses and supports the magnetic disk cassette 1 from above. Discs P5
1: an upper lid equipped with rotatable lumbars 17, etc., which are used to suppress and support during the final serration; 18 is a cassette holder on which the magnetic disk cassette 1 is placed;

On the other hand, the rotating shaft 1 of the magnetic disk drive motor 1S
A turntable 20 on which the disc hub 3 is mounted is fixed to the turntable 9, and the disc hub 3 is mounted inside the turntable 20.
A truncated conical center post 21 is built in to abut the center hole 4 of the magnetic disk and center the magnetic disk. The center post 21 is slidable in the axial direction of the rotating shaft 19, and is supported and pressed upward by a compression spring (not shown).

From the state shown in FIG. , the disk 2 is centered and clamped, and can be held in the loading state shown in FIG. 2(b). (The locking mechanism etc. are not shown.) At this time,
After a certain delay time, the cassette holder 18 releases the top lid 1.
It has a structure that is linked to 5. Further, each of the upper lid 15° cassette holders 18 has a support shaft 24. It rotates around a support shaft 25. Therefore, the height of the device increases in proportion to the sine of the angle formed between the upper lid 15 and the horizontal direction. Note that 26 and 27 are springs for biasing in the direction opposite to the arrow 23.

In the loading state shown in FIG. 2(b), the disc hub 3 is centered at the center post 21 and at the same time the turntable 20. The crank 17 is held by a clamp 17. At this time, the crank 17 is pressed and supported downward by a spring (not shown).

As outlined above, in the conventional drive device, (1)
Since the top cover with the disc-pushing clamper and the cassette holder that interlocks with the top cover after a certain delay time are constructed as separate members, the number of parts is large and the structure is complicated.

(2) Since both the top cover and the cassette holder rotate around the support shaft, the stroke (movement f) at one end opposite to the support shaft is proportional to the horizontal direction of the top cover and the sine of the Narigashi angle. It has the potential to become larger. Therefore, there is a limit to how thin the drive device can be made.

(3) Loading, including centering and clamping of the disc, cannot be completed unless a series of two operations, inserting the cassette and pressing the top lid, is completed.
Operability is extremely poor.

Therefore, when unloading, it is necessary to perform a series of reverse operations, and this poor operability becomes especially noticeable when using a single-sided head and replacing the recording surface of the magnetic disk cassette.

It has the following disadvantages.

On the other hand, in the future, it is expected that magnetic disk drive devices will be used in a wide variety of fields, and that users will become younger.As we pursue improvements in operability and miniaturization of devices, we will need to overcome the above-mentioned drawbacks of conventional devices. This is considered important.

An object of the present invention is to provide a run 1 mechanism that is most suitable for application to a highly operable drive device in which loading is performed only by inserting a magnetic disk cassette into the main body of the drive shaft. This contributes to making the device body smaller and thinner.

In the present invention, the clamping mechanism is provided integrally with a cassette holder that stores an 8-air disc cassette, and as the cassette holder moves, it can be put into two states: a non-clamped state and a clamped state. This contributes to improving operability and making the drive device thinner.

Hereinafter, one embodiment of the present invention will be explained with reference to FIG. In addition, on both sides (fi11 side), there are bins 2 equipped with rolling elements.
9 is provided and inserted into an L-shaped hole 31 of a holder post 30 fixed to the pace 12. Further, a column 33 fixed to the upper plate 32 of the cassette holder 28
is provided with a support shaft 34, and using this as a support, the arrow 3
A lever 36 rotatable in five directions is fixed, and this lever is biased counterclockwise by a torsion spring 36'. Further, 37 is a rotatable ramper.

Next, the operation of this clamp mechanism will be explained. Third
Figure (a) shows the state in which the magnetic disk cassette 1 has been stored in the cassette holder 28. At this time, one end of the lever 36 is in contact with the top plate 38, and the lower surface of the clamper 37 at the other end is in contact with the top plate 38. is set at a position where insertion of the cassette 1 cannot be prevented.

Therefore, the height position of the cassette holder 28 can also be suppressed to the necessary minimum. Also, from now on,
As the cassette is inserted, the cassette holder 28
Perform the movement as regulated by the L-shaped hole 31, and perform the movement as shown in Fig. 3 (
The state shown in 1 is reached, and so-called loading including centering and clamping of the disk is completed. 1
That is, when the cassette holder 28 changes from moving in the insertion direction 10 to moving in an axial direction substantially perpendicular to this, one end of the lever 36 is completely separated from the top plate 38 and is rotated counterclockwise by the torsion spring 36'. Clamper S7 energized in the direction
This will press and support the disc hub 3 which has been centered by the center and the tabs. Therefore, the disc hub 3 is set to be able to rotate integrally with the rotating shaft 19 while being held between the clamper 37 and the turntable 20.

In addition, 39 is a biasing spring that acts to maintain the state in either state shown in FIG. This is done by making the cassette holder move.

As explained above, according to this embodiment, by being integrated with the cassette holder, which is the clamper mechanism, and interlocking with the cassette holder, centering and clamping of the disc nop can be performed with a single operation of inserting the cassette. The so-called disk loading process can be completed, and the operability can be greatly improved.

Further, the raising and lowering tt of the cassette holder can be suppressed to the minimum necessary, which is effective in making the device thinner and smaller.

As explained above, according to the present invention, the clamper mechanism is integrally provided in the cassette holder, which makes complex movements in two directions, the cassette insertion direction and the direction substantially orthogonal thereto. The mechanism can take the unclamped state and the clamped state according to the movement of the cassette holder, so a single action of inserting the cassette can complete the loading process, including centering and clamping the disc. . Therefore, operability can be greatly improved.

Furthermore, the amount of elevation and descent of the cassette holder can be suppressed to the necessary minimum, which is effective in making the device thinner and smaller.

[Brief explanation of the drawing]

FIG. 1 (b) is a perspective view and a cross-sectional view of an example of a magnetic disk cassette, FIG. 2 (b) is a cross-sectional view showing a conventional drive device, and FIG. 3 (a). (b3 is a front view showing the clamp mechanism according to the present invention, with a part of the drive device cut away. 1... Book disc cassette 3... Disk hub 28..., cassette holder 29...Bin 30-Holder support 31...L-shaped hole 32-
Upper plate 33... Support column 54... Support shaft
36...Lever 37...Clamper 3
8...Top plate 36'...Torsion spring 1 Kuchi (ku), u--, -□ O 2 Mountain (shi) Sai 3 Prisoner (shi) β Continued from page 1 0 Inventor Ouchi Yoshio 11-1 Higashitaga-cho-chome, Hitachi City, Hitachi, Ltd., Taga Factory 0 Inventor: Katsuhiro Shiobara, Hitachi City, Higashitaga-cho-chome 1-1, Hitachi, Ltd. Taga Factory

Claims (2)

[Claims] (1) At least a cassette holder movable in a direction substantially perpendicular to the magnetic disk cassette and for holding the magnetic disk cassette; a disk hub provided at the center of the magnetic disk built in the magnetic disk cassette; A magnetic disk drive device comprising: a rotatable turntable for placing the cassette; a member for centering the magnetic disk; and a clamp mechanism for pressing and supporting the disk hub from above. A lever that performs a movement using a spindle attached to the holder as an actual point, a rotatable member provided at one end of the lever for pressing and supporting a disk hub, and urging the lever in the direction of pressing the disk hub. A magnetic disk drive mounting device characterized in that the clamping mechanism is constituted by an elastic material for holding the rotatable member, and a fixed member that abuts on the other end of the rotatable member. (2) After inserting the magnetic disk cassette into the cassette holder in which one end of the rotatable member is in contact with the fixed member and storing the magnetic disk cassette, the magnetic disk cassette is inserted a predetermined amount in the insertion direction and in a direction substantially perpendicular thereto. , by moving, one end of the lever that is not provided with the rotatable member separates from the fixed member, and the rotatable member attached to the other end of the lever, which is energized by the elastic material, moves the disc hub away from the fixed member. Patent claim 1, characterized in that it is pressed and held;
The magnetic disk drive device according to item 1 below.