JPH11238335A - Removable disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cartridge preventing a disk from being damaged and raising dust generated by collision with the inner wall of the case by controlling a free movement of the disk built into the cartridge when a free removable disk cartridge is not mounted on a recording and reproducing disk device. SOLUTION: This removable disk cartridge is constituted of a recording and/or reproducing disk 54 fixedly mounted with a center hub 53 at the center position, a case consisting of an opening part through which the disk 54 is built in and a turning type actuator can be inserted from the side and top and bottom halves 51, 52 provided with a disk mount hole for fitting a center hub on a bottom surface, and an open/close shutter part turning along the opening part. This shutter part is positioned with the turning center of the sectoral form shutter positioned off the center of the center hub 53, and is provided with a disk lock means to hold the center position of the center hub 53, and has also a structure provided with a buffer means holding both surfaces from the disk end sides in a fitting state with play.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removable disk cartridge, and more particularly to a removable disk cartridge having a mechanism for avoiding damage caused by unnecessary movement of a disk built in the cartridge. Things.

[0002]

2. Description of the Related Art Conventionally, a cartridge type magnetic disk device (hard disk, hereinafter referred to as a disk device) having a configuration shown in FIGS. 7 and 8 is known. The disk device 10 includes a spindle 12 installed at a substantially central position of an apparatus main body 11, a spindle motor moving means (not shown), a rotary actuator 13 for recording and reproducing information on a disk, and a rotary actuator 13 It comprises a lamp 14 as a standby place, a removable disk cartridge 15 containing a disk, and a top cover 16 for creating a space in which the removable disk cartridge 15 is inserted.

As shown in FIG. 9, a rotary actuator 13 includes a flying slider 1 on which a magnetic head is mounted.
7, 17, suspensions 19, 19 serving as springs for pressing the flying slider 17 in the surface direction of the disk 18 with a predetermined load, an arm 20 for setting the actuator length to a specified length, and a tip end of the suspension 19. And a projecting dimple plate 21. The dimple plate 21 is used for the actuator 13
Unload state when is in standby state.

In FIG. 7, the rotary actuator 13 having the above-described structure is a VC actuator comprising a coil 22 and a magnet 23 attached to the rear end of an arm 20.
It rotates about the fulcrum shaft 24 by M (Voice Coil Motor).

In FIG. 9, the tip of the ramp 14 has an inclined portion with which the dimple plate 21 contacts. Usually, when the disk cartridge 21 is not inserted, the rotary actuator 15 is moved to the uppermost position of the inclined portion. Or, it is in a state of unloading after waiting (clockwise around the fulcrum shaft 24 in FIG. 7).

Also, the removable disk cartridge 15
As shown in FIG. 10, the upper half 25 and the lower half 26 formed in a square symmetrical housing 27 and information contained in the housing 27 formed by the upper and lower halves 25 and 26. It comprises a disk 18 which is a recording / reproducing medium, a center hub 28 mounted and fixed at the center of the disk 18, and a cartridge shutter 29 which is mounted inside the upper half 25 and can be opened and closed.

When the removable disk cartridge 15 having such a structure is inserted into the space between the apparatus main body 11 of the disk device 10 and the top cover 16, as shown in FIG. After the disk 18 and the spindle 12 in the disk cartridge 15 are mechanically connected and fixed (hereinafter referred to as chucking and described below) after the ascent (see FIG. 7) moves upward,
The spindle 12 rotates. Then, the rotary actuator 13 slides down on the slope of the ramp 14 (rotates counterclockwise about the fulcrum shaft 24 in FIG. 7), and falls on the disk 18 to stand at any position on the disk 18. Flying slider 1 having magnetic head
7 loads. When loading, the circuit part 3
0 can be recorded and reproduced.

The chucking is to mechanically connect and fix the spindle 12 and the disk 18 as shown in FIG.
As shown in FIG. 1A, when the disk cartridge 15 is inserted and mounted in the disk device 10 and reaches the center position between the center hub 28 and the spindle 12 of the disk cartridge 15, the spindle 12 is moved upward by means not shown. .

As a result, as shown in FIG.
A center hub 2 made of a magnetic material is provided by a magnet 31 provided at the tip of the spindle 12 and near the center thereof.
8 and the chucking surface 32 of the spindle 12 are stuck and chucked. When the chucking is performed, the contact between the center hub 28 and the lower half 26 is released, and the disk 18 can freely rotate.

[0010]

However, FIG.
As shown in FIG. 2, usually, the disk 18 can be freely rotated in the removable disk cartridge 15.
A sufficient gap 33 is formed between the upper and lower halves 25 and 26.

There are mainly two reasons for forming with a sufficient gap 33. The first reason is that the upper and lower halves 25 and 26 are usually manufactured by injection molding of plastic, and the completed upper and lower halves 25 and 26 are somewhat distorted. This distortion is the upper and lower half 25,2
Since the largest distortion occurs at the central portion of No. 6, a gap 33 is formed in consideration of this distortion.

The second reason is that the disk 18 is formed with a margin 33 in advance so that the disk 18 has a margin for freely rotating even if the chucking height varies.

The gap formed for such a reason is in a state where the removable disk cartridge 15 is detached from the disk device (see FIG. 12), that is, in a state where the disk 18 can move freely in the removable disk cartridge 15. At one point it becomes a big problem. That is,
In a normal handling state, the removable disk cartridge 15 may be tilted, vibrated by transportation, or sometimes dropped from a desk or the like. At this time, the removable disk cartridge 15 can freely move inside the upper and lower halves 25 and 26 as shown in FIG. ) Collide with the inner wall surface and damage the disk 18 or generate dust from the disk 18 or the upper and lower halves 25 and 26.

[0014] In order to avoid such inconvenience, some measures have been taken. The easiest method is to increase the thickness of the removable disk cartridge 15 as shown in FIG. 13 and to secure a sufficient gap 34 between the upper and lower halves 25 and 26 so that the disk 18 does not hit even if it is inclined. I do. However, in this case, the thickness of the disk device main body is increased, which does not meet the recent demand for miniaturization of the device.

[0015] Accordingly, there is a problem to be solved by a structure in which the apparatus is miniaturized and which can prevent damage and dust generation of the disk in the removable disk cartridge.

[0016]

In order to solve the above problems, a removable disk cartridge according to the present invention comprises:
A recording and / or reproducing disk having a center hub mounted at a center position, an opening in which the disk is built-in and a rotary actuator can enter and exit from a side surface, and a disk mounting hole into which the center hub fits. A removable disk cartridge comprising a housing provided with a shutter for opening and closing the opening, wherein the shutter is formed in a fan shape so that the opening can be opened and closed by rotation, and the rotation center The position is set to a position deviated from the center position of the center hub, and disk lock means for pressing the center position of the center hub when the shutter is closed is provided.

Further, the shutter portion is provided with a buffer means for sandwiching the end of the disk in a loosely fitted state.

In the removable disk cartridge having such a structure, when the built-in disk can move freely, it is possible to suppress the unnecessary movement by holding down the center position of the disk and to buffer the movement of the disk. Therefore, it is possible to prevent damage to the disk itself and dust generation due to collision with the inner wall surface of the housing.

[0019]

Next, an embodiment of a removable disk cartridge according to the present invention will be described with reference to the drawings. Incidentally, the disk device 10 to which the removable disk cartridge is mounted is shown in FIGS.
The description is omitted because it is the same as the related art described with reference to FIG.

The buffer means for buffering the movement of the disk in the removable disk cartridge according to the present invention is such that a part of the end of the disk is loosely fitted to the tip of a rotatable metal shutter (shutter portion) formed in a fan shape. It has a structure in which a buffer portion sandwiched between is provided.

Further, the disk lock means for suppressing the movement of the disk sets the rotation center position of the fan-shaped rotation type metal shutter to a position deviated from the center position of the disk, and when the shutter is closed, the center hub. The convex portion or the leaf spring provided in the rotary metal shutter is brought into contact with the convex portion at the center position of the shutter. By adjusting the hitting height, the disc is locked by lightly pressing down the disc just below.

A removable disk cartridge provided with such buffer means and disk lock means will be described with reference to the drawings.

The removable disk cartridge 50
As shown in FIG. 1, the upper half 51 and the lower half 52 of a substantially square shape, a disk 54 as a recording and / or reproducing information medium having a center hub 53 mounted and fixed at a center position, and a fan-like shape are formed. And a rotating metal shutter 55.

The upper and lower halves 51 and 52 constitute a housing, and the upper and lower halves 51 and 52 (housings) are cut out in a circular arc at one corner located on the front side.
Are provided, and the cutouts 56a and 56b of the two form an opening formed by cutting the side surface of the housing. The opening is large enough to allow a rotary actuator to enter and exit, and specifically has a structure that allows a suspension equipped with a rotary head to enter and exit.

The upper half 51 has a circular depressed surface 57 large enough to allow the disk 54 to move freely, and a rotation center at which a position deviated from the center position of the built-in disk 54 becomes a rotation center position. The structure has a hole 58.
The rotation center hole 58 is fitted with a pin 57 at a rotation center position of a rotation type metal shutter 55 formed in a fan shape.

The lower half 52 is provided with a circular depressed surface 58 at a position facing the depressed surface 57 of the upper half 51, the circular depressed surface 58 being large enough to allow the disk 54 to move freely.
, That is, a disc mounting hole 59 formed in a through hole into which the center hub 53 of the disc 54 fits is provided at the bottom side of the housing formed by the upper and lower halves 51 and 52. The disc mounting hole 59 is used when facing the center hub 53 and mounting the disc on a spindle in a disc device (not shown).

The fan-shaped rotatable metal shutter 55 is provided at a position on the key (key) side of the fan shape.
And a shielding part 61 for closing the notches (openings) 56a and 56b formed by the upper and lower halves 51 and 52 in an arc shape on the side surface on the wide distal end side. A buffer portion 62 formed continuously with the shielding portion 61 and formed with a predetermined width in a direction to enter the rear side of the disk 54, that is, in a necessary direction.
And the structure provided. A buffer means for sandwiching the disk 54 in a loosely fitted state is formed between the buffer portion 62 and the wide distal end side.

Further, a shutter convex portion 63 is provided at a position deviated from the rotation center portion 60 in a downward direction. The shutter convex portion 63 is a rotatable metal shutter 55.
When the is closed, the tip of the shutter protrusion 63 is in a positional relationship in which it contacts and presses the tip of the center protrusion 64 of the center hub 53 of the disk 54.

The rotation center portion 60 has a pin insertion hole 65 for inserting the pin 57, a coil spring 66 for urging the rotation type metal shutter 55 to always close, and a spring stopper for stopping one end of the coil spring 66. Part 67,
And a lock portion 68 that is inserted into and engaged with the tip of the pin 57. The other end of the coil spring 66 can be engaged with the upper half 51 (not shown).

In the removable disk cartridge 50 having such a structure, the disk cartridge 5
When the disk drive 0 is not mounted on the disk device 50 (see FIG. 7), as shown in FIG. 2, the rotary metal shutter 55 is closed by the urging force of the coil spring 66 (see FIG. 1). As shown in FIG. 2B, the shutter protrusion 63 is positioned so as to abut and suppress the center protrusion 64 of the center hub 53. Therefore, the disk 54
Since the entire center hub 53 is pressed into the disk mounting hole 59 of the lower half 52, the free movement of the disk 54 can be considerably suppressed.

At the same time, as shown in FIG. 2C, the free end side of the disk 54 is sandwiched in the buffer portion 62 of the rotatable metal shutter 55 in a loosely fitted state. Even if a shock is applied to the removable disk cartridge 50, the disk 54 itself is
Does not contact or collide with

Further, even if the circumferential end of the disk 54 hits the buffer portion 62 provided on the rotatable metal shutter 55, the disk 54 is pressed at the center of the disk 54 and fits in the disk mounting hole 59 of the lower half 52. Since it is in the retracted state, the applied impact is absorbed, and the impact force is extremely weakened.

FIG. 3 shows a state in which the removable disk cartridge 50 has been inserted into the disk device 10 (see FIG. 8) and the suspension 19 of the rotary actuator 13 has entered through the opening (notch 56b). ing. The rotatable metal shutter 55 is rotated in a counterclockwise direction by a method (not shown), and the notch 56b (opening) is formed.
Is exposed, and the suspension 19 can rotate from the notch 56b (opening) as shown in FIG. At this time, as shown in FIGS. 3B and 3C, the shutter convex portion 63 of the rotary metal shutter 55 is used.
Is located at a position deviated from the center convex portion 64 of the center hub 53, that is, just at the depressed concave portion of the center hub 53, and a sufficient distance from the center hub 53 can be secured. Therefore, when the spindle 12 is raised and mounted on the center hub 53, the disk 54
Can be freely rotated without disturbing even if it is raised to an intermediate position W in the gap of the housing.

Next, another specific example of the disk lock means attached to the rotatable metal shutter 55 of the removable disk cartridge will be described with reference to FIGS. Note that the same components described with reference to FIGS. 1 to 3 are given the same reference numerals and described.

The disk locking means is a disk 54
Projection 6 on fan-shaped rotating metal shutter 55
Instead of 3 (see FIG. 1), the disk 54 is pressed by a leaf spring 70. That is, when the rotary metal shutter 55 is closed, the disk 54 is pressed toward the lower half 52 by pressing the center convex portion 64 at the center position of the center hub 53 with the leaf spring 70.

When the leaf spring 70 is used as described above, the height of the shutter convex portion 64 is adjusted according to variations in the thickness of the removable disk cartridge 50, the thickness of the center hub 53, the height of the center convex portion 64, and the like. Elimination or simplification of the adjustment. That is, the height variation can be absorbed by the leaf spring 70, and the disk 54 can be stably pressed down to the lower half 52 side without any troublesome adjustment.

When the removable disk cartridge 50 having such a structure is not mounted on the disk device 10 (see FIG. 7), as shown in FIG. , The leaf spring 70 of the rotary metal shutter 55 is positioned so as to just press the center convex portion 64 of the center hub 53, and does not require any special adjustment. The whole is pressed against the lower half 52 side.

At the same time, the outer peripheral end of the disk 54 is sandwiched in a loosely fitted state by the buffer portion 62 provided on the rotatable metal shutter 55. In this way, when the removable disk cartridge 50 is not mounted on the disk device 10, the movement is limited by pressing down the center position of the disk 54, and the outer peripheral end of the disk 54 can be absorbed by the shock absorber 62. Because of the structure, even if an external impact is applied, the impact on the disk 54 is buffered, collision with the inner wall surfaces of the upper and lower halves 51 and 52 is avoided, and unnecessary movement can be suppressed. Also, no dust is generated.

Next, when the removable disk cartridge 50 is inserted into the disk device 10, the leaf spring 70 provided on the rotatable metal shutter 55 is moved from the center convex portion 64 of the center hub 53 as shown in FIG. The center hub 53 is in a depressed position. That is, even if the distance from the center hub 53 is sufficiently ensured, the spindle 12 rises and is mounted on the center hub 53, and the disk 54 is freely rotated without disturbing even if the disk 54 is raised to an intermediate position W in the gap of the housing. it can.

As described above, if the leaf spring 70 is used, the free movement of the disk 54 built in the removable disk cartridge 50 can be suppressed without the need for adjustment or simple adjustment.

[0041]

As described above, the removable disk cartridge according to the present invention limits and buffers the movement of the disk in the cartridge when it is not mounted on the disk device, thereby enabling the disk and the upper and lower halves to be separated from each other. There is an effect that collision with a wall surface can be avoided, damage to the disk and dust generation can be suppressed, and the performance of the removable disk cartridge can be significantly improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a removable disk cartridge according to the present invention.

FIG. 2 is a view when the shutter is closed with the same half removed, and FIG. 2 (A) is a plan view, FIG. 2 (B) is a sectional view taken along line AA, and FIG. 2 (C) is a sectional view taken along line BB.

FIG. 3 is a view when the shutter is open with the same half removed, and FIG. 3 (A) is a plan view, FIG. 3 (B) is a sectional view taken along line CC, and FIG. 3 (C) is a sectional view taken along line DD.

FIG. 4 is an exploded perspective view of another specific example of the removable disk cartridge.

5A is a plan view, FIG. 5B is a sectional view taken along the line EE, and FIG. 5C is a view when the shutter is closed with the upper half removed in the removable disk cartridge shown in FIG. It is FF sectional drawing.

6A is a plan view of the removable disk cartridge shown in FIG. 4 when a shutter is opened with an upper half removed, FIG. 6B is a plan view, FIG. 6B is a sectional view taken along line GG, and FIG. It is an HH sectional view.

FIG. 7 is an overall perspective view schematically showing a cartridge type magnetic disk device (disk device) in the process of inserting a removable disk cartridge.

FIG. 8 is an overall perspective view schematically showing a cartridge type magnetic disk device (disk device) into which a removable disk cartridge has been inserted.

FIG. 9 is a cross-sectional view showing an arrangement of a rotary actuator and a lamp.

FIG. 10 is an exploded perspective view of a removable disk cartridge according to the related art.

FIG. 11 is a schematic cross-sectional view showing a state of chucking in the related art, in which (A) the position of the disk and the spindle motor before and (B) after the chucking.

FIG. 12 is an explanatory view showing a state in which the inner wall surface of a housing (half) and a disk end collide with each other when a disk moves in a removable disk cartridge according to the related art.

FIG. 13 is an explanatory diagram showing an example in which the upper and lower halves of a removable disk cartridge in the prior art are thickened to avoid collision between the disk and the inner wall surface of the housing (half).

[Explanation of symbols]

Reference numeral 10: disk device, 11; device main body, 12; spindle, 13; rotary actuator, 14;
5; removable disk cartridge (prior art),
16; Top cover, 17; Flying slider, 18; Disk (prior art), 19; Suspension, 20; Arm, 21; Dimple plate, 22; Coil, 23;
Magnet, 24; fulcrum, 50; removable disk cartridge, 51; upper half, 52; lower half, 5
3; center hub, 54; disc, 55; notch, 5
6; Notch, 57; Depressed surface, 58; Rotating center hole, 59;
Disk mounting hole, 60; center of rotation, 61; shielding part, 6
2; buffer portion, 63; shutter convex portion, 64; center convex portion, 65; pin insertion hole, 66; coil spring, 6
7; spring stopper, 68; lock, 70; leaf spring,

Claims (3)

[Claims] 1. A recording and / or reproducing disk in which a center hub is mounted at a center position, an opening in which the disk is built-in and through which a rotary actuator can enter and exit from the side, and the center hub fits. A removable disk cartridge comprising: a housing having a disk mounting hole; and a shutter unit for opening and closing the opening, wherein the shutter unit is formed in a fan shape so that the opening unit can be opened and closed by rotation. A removable disk, wherein the rotation center position is set to a position deviated from the center position of the center hub, and disk lock means for pressing the center position of the center hub when the shutter is closed is provided. cartridge. 2. The removable disk cartridge according to claim 1, wherein said disk lock means is a projection or a leaf spring. 3. The removable disk cartridge according to claim 1, wherein said shutter portion includes a buffer means for holding said disk end portion in a loosely fitted state.