JP2625075B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive, and more particularly, to a disk for recording / reproducing information on / from a disk by means of a movable head with a disk cassette containing a disk as a recording medium being removably mounted. It concerns the device.

[0002]

2. Description of the Related Art As a device of this type, there is a magnetic disk device in which a magnetic disk cassette accommodating a magnetic disk of a magnetic recording medium is removably mounted and information is recorded and reproduced by a magnetic head.

In a conventional magnetic disk drive, when a disk cassette is lowered in accordance with a disk mounting operation, a separately provided head load mechanism is actuated to make the magnetic head resiliently contact the disk surface. . With such an apparatus, it is possible to prevent the magnetic head from colliding with the disk surface during the descent of the cassette and damaging the disk surface or the magnetic head.

[0004]

However, in the above-described apparatus, the head load mechanism must be arranged so as to avoid the moving range of the cassette guide holding the cassette, and the apparatus can be downsized. Did not.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk drive which can prevent a disk or a head from being damaged and can achieve downsizing.

[0006]

According to the present invention, there is provided a disk cassette having a shutter for opening and closing a head window for exposing a rotatably stored disk to the outside. Headwood
A disk device for moving said shutter to open and close said India, said disk device holding said disk cassette, and a first position at which said disk cassette can be inserted and removed, and a first position at which said disk can be recorded or played back on said disk. a cassette guide is transferred between the second position, the
When the cassette guide is located at the first position,
For inserting the disc cassette into the cassette guide
The shutter is opened so as to open the head window.
And an open member for moving the
And the first head mounted on the carriage
And the carriage is urged toward the surface of the disc to
A first arm attached to the head arm;
The head arm is attached to the head arm so as to correspond to the disposition position, and the head arm is formed on an engaging portion formed on the cassette guide (in an embodiment described later, the inner end of the head load arm 66 corresponds to the engaging portion). By engaging with
Wherein (in the embodiment described below, the downward movement corresponds) moves to the second position of the cassette guide adopts the configuration comprising a second header <br/> de interlocked with, the.

[0007]

According to this structure, the second head moves toward the surface of the disk in conjunction with the movement of the cassette guide from the first position to the second position. There is no need to dispose the head load mechanism outside the moving range of the guide.

Further, a second head before for the second head to follow the movement of the disc by the transfer from the first position of the cassette guide to a second position, the disk in the recording or reproduction can position reaches Never touch the disc.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 shows a magnetic disk cassette mounted on the apparatus according to the embodiment of the present invention. A magnetic disk 12 is accommodated in the cassette 1. A center hub 2 for clamping is projected from the center of the magnetic disk 12, a center hole 3 for centering is formed in the center of the center hub 2, and a magnetic disk is located near the center hole 3. A drive hole 4 into which a pin for rotating is fitted is provided.

A head window 5 is formed at a position closer to the cassette mounting direction indicated by arrow B.
Inside the head window 5, a dustproof shutter 6 is provided.
Is provided.

Small holes 8, 8 for positioning the cassette are formed on the left and right sides of the head window 5, and write protect holes 9, 9 and a notch 10 for detecting the front and back of the cassette are formed.

Reference numeral 11 denotes an index hole, and reference numeral 7 denotes a slide lever for opening and closing the shutter 6. When the cassette is mounted on the apparatus, the slide lever 7 is caught by a claw provided in the apparatus and moves in a direction to open the shutter 6.

The magnetic disk cassette having such a structure is mounted on a magnetic disk device shown in FIG.

A magnetic disk drive 15 according to an embodiment of the present invention
Has a pair of left and right side plates 16 and 17, and a front panel 18 is provided between the tips of both side plates.
8 has an opening 18a (insertion opening) for cassette insertion.

FIGS. 9 and 1 show the inside of the front panel 18.
As shown in FIG. 0, a pair of upper and lower dustproof doors 19 and 20 are rotatably supported at upper and lower ends thereof via shafts 21 and 22, respectively, and are provided by torsion coil springs 23 wound around the shafts 21 and 22. , A turning force in the direction of always closing is applied.

Here, in the single-opening type shown in FIG. 13A, when the dustproof door 19 is rotated about the shaft 21a, a depth of a distance R is required. FIG.
In the case of the double door system shown in FIG.
Rotate about axes 21 and 22, respectively, and the distance r
(However, r is about R / 2) and the depth is short, and the apparatus can be downsized accordingly. However, axis 2
If the distance 1 between the dustproof doors 19 and 20 does not match the dimensions of the dustproof doors 19 and 20, the leading ends of the dustproof doors 19 and 20 may collide or a gap may be formed at the leading end of the dustproof doors 19 and 20. As a result, the function of the dustproof door cannot be achieved. Moreover, such dimensional mismatches are often caused by variations in component dimensions.

Therefore, the configuration shown in FIGS. 9 and 10 is adopted.

That is, in FIGS. 9 and 10, the upper dust-proof door 19 is located in front of the lower dust-proof door 20, and as shown in FIG. A bent portion 20a bent by a certain angle α degrees is formed, and the bent portion 20a and the lower edge of the upper dustproof door 19 are in contact with each other to form a double-door type door, and a cassette is mounted. When there is no space, it is closed so that there is no gap.

In order to maintain such a positional relationship, FIG.
0, as indicated by reference numerals l1 and l2, respectively.
It is necessary that the turning radii of the 20 are approximately equal.

Inside the front panel 18 and inside the device,
As shown in FIG. 4, a flat U-shaped cassette guide 24 whose lower part is open is arranged. When the cassette is not mounted, the cassette guide 24 faces the cassette insertion port 18a formed on the front panel. Accordingly, when the cassette 1 is mounted, the cassette 1 is fitted to the leading end of the cassette guide 24 and guided straight by the cassette guide 24. At this time, a projection (not shown) has a slide lever 7 provided on the side surface of the cassette. In this case, the shutter 6 is gradually opened as the cassette moves deeper, and when the cassette reaches the innermost portion, the shutter 6 is completely opened, and the head and the magnetic disk can come into contact with each other.

Above the cassette guide 24, a cassette discharge lever 25 is provided. The discharge lever 25 has slots 25a and 25b, and a guide pin 2 is provided in each slot.
6 and 27 are slidably fitted, and a spring 28 is stretched between a projection 24a cut and raised from the cassette guide 24 and one end 25c of the cassette discharge lever 25, so that the front panel 18 is always on. Have been given the habit of moving to.

A bent portion 25d is formed at the end of the cassette discharge lever 25 so as to face downward.
"d" is fitted downward from an opening 24b formed in the cassette guide 24, and comes into contact with the cassette inserted into the cassette guide.

At the end of the discharge lever 25, a protruding piece 25e is provided on the side plate 16 side, and the lock arm 29 is rotatable about the shaft 30 at a position where it can be engaged with the protruding piece 25e. Is provided. Lock arm 2
In FIG. 5, two arms 3 are provided with a rotation behavior in the counterclockwise direction in FIG. 5 at all times by a spring 31 stretched between the projections 16a at the end of the side plate 16 and the front.
2,33. The arm 32 is a protruding piece 25 of the ejection lever 25.
e.

On the other hand, an eject lever 34 is arranged outside the side plate 16. The eject lever 34 is located at a position apart in the longitudinal direction, and in a horizontal state, the long holes 34a, 34b
A pin 35 protruding from the side plate 16 is slidably fitted in these long holes.

An elongated opening 34c is formed substantially at the center of the eject lever 34 between the slots 34a and 34b. A hole 36 is provided near the lock arm 29 near the opening 34c.
A spring 38 is stretched between a hole 37 provided in a side plate located on the opposite side of the eject lever 3 and the eject lever 3.
4, the movement behavior to the front panel 18 side is always given.

A pin 39 protrudes from the outer surface of the end of the eject lever 34 on the lock arm 29 side, and the pin 39 is connected to a hook 33 a formed at the tip of the arm 33 of the lock arm 29. It is in a position where it can engage with.

Inside the front panel 18, side plates 16, 17 are provided.
A shaft 40 is suspended between the shafts.
One end of one is rotatably supported.

On the free end side of the rotating plate 41, a pin 42 protruding inward is rotatably supported by a protruding piece 43 protruding from both side edges of the cassette guide 24. The moving plate 41 and the cassette guide 24 are interlocked.

A pin 44 protrudes in the middle of the rotating plate 41 toward the side plate 16, and the pin 44 is formed in the shape of “H” in the vicinity of the upper end of the eject lever 34. It is slidably fitted in the cam hole 45.

A lock lever 46 is rotatably mounted on the cassette guide 24 via a pin 47 at a position close to the cassette discharge lever 25 and close to the side plate 16. The lock lever 46 is provided on the pin 47 side, that is, on the lock arm 29 side, with the projecting piece 4 facing outward.
6a, and the projecting piece 46a is located at a position where it can be engaged with the end edge 34d of the eject lever 34 on the lock arm 29 side.

A pin 48 protrudes from an end of the lock lever 46 opposite to the pin 47, and a "V" -shaped spring 49 is provided between the pin 48 and the pins 26 and 27. It is stretched, and gives the lock lever 46 a clockwise rotation behavior in FIG.

The lock lever 46 is at the end on the pin 48 side.
Also, at the end edge on the cassette discharge lever 25 side,
6b is projected, and this protruding piece 46b is an end 25d (bent portion) of the cassette discharge lever 25 on the front panel 18 side.
It is in a position where it can engage with.

One end of a leaf spring 50 is fixed to the center of the upper surface of the rotating plate 41 by a pin 51.

A hub retainer 53 is attached to the lower surface of the leaf spring 50 on the free end side via a bearing 52.

A spindle 54 is mounted below and opposite to the hub retainer 53. The spindle 54 is mounted on the substrate 54a of the apparatus as shown in an enlarged manner in FIG.
The disk 55 is fixed on the upper surface thereof. In the center of the disk 55, the spindle 5
4 is formed with a through hole through which a spindle shaft 56 slidably provided protrudes. The spindle shaft 56 is given a movement behavior in a direction in which it is always protruded by a spring 57. A drive pin 58 that fits into a drive hole 4 formed in the hub 2 of the magnetic disk is fitted in a part of the disk 55 so as to be able to move up and down freely. Has been given.

A pulley 60 is fixed to the lower end of the spindle 54. As shown in FIG. 8, a belt 63 is stretched between the pulley 60 and a pulley 62 fixed to the output shaft of the motor 61, and transmits a rotational force.

On the other hand, as shown in FIG.
On the upper surface of 4, projecting pieces 64, 64 are provided so as to protrude in the front and rear direction in the cassette insertion direction on the side opposite to the cassette discharge lever 25, and a shaft 65 is suspended between them. A central portion of a head load arm 66 is rotatably supported on the shaft 65.

At the outer end of the head load arm 66, a projecting piece 66a protruding outside the side plate 17 is provided, and a pin 6 is provided below the projecting piece 66a outside the side plate 17.
The push arm 68 is rotatably supported via the switch 7. The tip of the horizontal portion of the rotating arm 68 is
The vertical portion of the push arm 68 is rotatably connected to one end of the load arm 70 via a pin 69.

The other end of the load arm 70 is connected to the front panel 18.
On the other side, it is connected to a rod 71a of a solenoid 71 fixed to the device.

A spring 72 is stretched between the protruding piece 66a of the head load arm 66 and the pin 67 and the pin 73 protruding from the side plate 17, and the head load arm 6
6, the clockwise rotation behavior in FIG. 4 is always provided.

A head arm 74 faces the upper side of the cassette guide 24 in a state corresponding to the leaf spring 50. A block 7 in which the base end of the head arm 74 is rotatably supported on a seek arm side to be described later via a pin 75.
6 is connected via a screw 77. In Figure 6 by the coil spring 78 blocks 7 6 <br/> torsion, is given a rotational behavior in the counterclockwise direction, the lower surface of the tip of the head arm 74 is fixed a magnetic head 79 of the movable side I have.

The head arm 74 is formed of, for example, a leaf spring, and a protruding piece 74a is formed at an end of the head arm 74 on the head load arm 66 side.
The inner end of the head load arm 66 is engaged with the lower side of the head load arm 4a.
4 is constantly being pushed up. An opening 24c is formed in the cassette guide 24 corresponding to the head 79, and a fixed-side head 80 is disposed below the carriage 79, which will be described later, corresponding to the moving-side head 79.

On the other hand, as shown in FIG. 2 (plan view), FIG. 15 (perspective view), and FIG. 16 (side sectional view), a stepper motor 81 is mounted and a joint fitting 82 fixed to an output shaft thereof. The holes 83a and 83b of the gimbal spring 83 are fitted into the dowels 82a and 82b. One end of a lead screw 84 is connected to the center hole 83c of the gimbal spring 83. The other end of the lead screw 84 is rotatably supported by a bearing 85.

The lead screw 84 and the output shaft of the stepper motor 81 are connected by a gimbal spring 83 shown in FIG. 17 (plan view) and are pressed in opposite directions by a displacement amount 6 shown in FIG. For this reason, the backlash in the thrust direction of the output shaft of the bearing 85 and the stepper motor 81 can be eliminated.

In FIG. 2, one end of a seek arm 86 is screwed to the lead screw 84, and the lead bar 87 fixed via the seek arm 86 is moved back and forth.

The seek arm 86 is mounted outside the carriage 88, and the seek arm 8 of the carriage 88
The part opposite to 6 is guided by a guide bar 89 parallel to the lead screw 84. This carriage 8
A pin 75 for bearing the block 76 is suspended between a pair of protruding pieces 88a, 88a protruding on the upper surface 8.

A pair of left and right leaf switches 9 are provided below the front end of the cassette guide 24 on the substrate 54a of the apparatus.
0 and 90 are arranged. These leaf switches 90
Is for detecting the presence / absence of the cassette and for detecting the front and back of the cassette, and corresponds to the notch 10 for front / back detection formed on the magnetic disk cassette 1 and is mounted at a symmetrical position on the apparatus.

In the method using the photocoupler shown in FIG. 14A, the light emitting section 90a and the light receiving section 90b need to correspond to the cutouts 10 on both sides of the cassette 1, so that the mechanism tends to be complicated. In addition, since it is necessary to always supply a current for light emission to the light emitting unit 90a, power consumption increases.

Therefore, if a system using the microswitch shown in FIG. 14B is used, the microswitch 90c can know the presence or absence of the notch 10 through the pin 90d, and therefore, the microswitch 90c can be used for the notch 10 on one side of the cassette 1. And the mechanism becomes simple. Further, since a member for emitting light is not required, power consumption may be small.

However, since the micro switch 90c has a large length m, the thickness of the mounting must be increased accordingly. Therefore, when the leaf switch 90 as described above is used, the dimension m is reduced and the device can be made thinner.

Next, the operation of the apparatus according to the embodiment of the present invention configured as described above will be described.

Before the magnetic disk cassette 1 is mounted, the upper and lower dustproof doors 19 and 20 are moved by the force of the torsion coil spring 23 as shown in FIG.
Is closed in a state where the lower end thereof is in contact with the outside of the bent portion 20a at the upper end of the lower dustproof door 20, and there is no gap.

When the magnetic disk cassette 1 is mounted in this state, the dustproof doors 19 and 20 are pushed up and down and opened.
At this time, the upper and lower dustproof doors 19 and 20 are overlapped, and the width of the doors is correspondingly large, and as shown in FIG. 10, the shaft 21 and the upper surface of the magnetic disk cassette 1 located above the cassette insertion slot 18a. Can be increased.

Accordingly, the arm of the moment has become longer, and the door is opened with less discomfort, so that the magnetic disk cassette can be mounted very easily.

The cassette inserted from the cassette insertion opening 18a is guided and advanced by the cassette guide 24. At this time, a projection (not shown) hits the slide lever 7 of the cassette 1, and the shutter 6 gradually moves as the cassette advances.
Is opened.

The magnetic disk cassette 1 eventually comes into contact with the bent portion 25d at the inner end of the cassette discharge lever 25, and advances this against the tensile force of the coil spring (spring) 28.

Eventually, the projecting piece 2 of the cassette discharge lever 25
5e comes into contact with the arm 32 extending upward of the lock arm 29, and resists the tensile force of the coil spring 31.
Is rotated clockwise in FIG.

Then, the hook 33a of the arm 33 extending toward the front panel 18 with the rotation of the lock arm 29 is
Move away from 9. Therefore, the eject lever 34 is guided by the pin 35 by the tensile force of the spring 38 and moves toward the front panel 18.

With the movement of the eject lever 34, the pin 4
4 is pushed downward by a cam hole 45 formed in the shape of a "H". When the pin 44 is pushed downward, the rotating plate 41 to which the pin 44 is attached is rotated in the clockwise direction in FIG. As a result, the cassette guide 24 moves down together with the cassette 1. At this time, the descending amount of the cassette guide 24 is amplified according to the ratio of the distance 15 between the shaft 40 and the pin 44 and the distance 16 between the shaft 40 and the pin 42 as shown in FIG.

As the cassette guide 24 descends, the leaf spring 5
Numeral 0 is lowered together with the rotating plate 41, and the hub holder 53 is lowered to hold the hub 2 of the magnetic disk 12 housed in the magnetic disk cassette between the hub 54 and the spindle 54. At this time, the lower end of the hub holder 53 is fitted into the center hole 3, and the spindle shaft 56 of the spindle 54 is also fitted into the center hole 3 from below, so that the magnetic disk is centered. Then, the driving hole 4 and the driving pin 58
If they are on the same axis, they are immediately fitted, but usually they are in contact with the lower surface of the hub 2, elastically deform the leaf spring 59, and have moved downward.

The downward movement of the cassette guide 24 at this time is equivalent to the ratio of the distance of the above-mentioned l5 to the amount of the downward movement of the rotary plate 41 and l7 from the shaft 40 to the hub retainer 53. Only amplified.

When the magnetic disk cassette 1 reaches the mounting reference position in this way, the positioning pins P projecting from the substrate 54a of the apparatus are fitted into the positioning holes 8 of the cassette.

On the other hand, with the advance of the cassette discharge lever 25 generated during the above operation, the projection 46 of the lock lever 46
b comes into contact with the end edge 25d of the cassette discharge lever 25, and the lock lever 46 is rotated clockwise in FIG. 2 to prevent the cassette discharge lever 25 from retreating and locked.

With the lowering of the cassette guide 24, the head load arm 66 also lowers, but the lowering amount of the head arm 74 which lowers accordingly is not so large, and the head 79 on the moving side moves inside the magnetic disk cassette 1. The magnetic disk is sandwiched between the magnetic disk 12 and the fixed-side magnetic head 80 while maintaining a slight gap.

By the operation described above, the magnetic disk cassette 1 is set in the apparatus.

On the other hand, when the magnetic disk cassette is lowered as described above and positioned on the mounting reference plane, the leaf switch 90 detects that the magnetic disk cassette 1 has been mounted, and one of the two leaf switches Is turned on. At the same time, the front and back of the magnetic disk cassette 1 are detected. When the mounting state of the magnetic disk cassette is confirmed, the motor 61 is turned on and the belt 6
The pulley 60 is rotated via 3 and the rotation of the spindle 54 starts. With the rotation of the spindle 54, the drive pin 58 is fitted into the drive hole 4 of the hub 2 during the maximum rotation of the spindle 1, and the magnetic disk 12 starts rotating.

On the other hand, when the leaf switch detects that the magnetic disk cassette is in the mounted state, the solenoid 71 is excited and the rod 71a is retracted, so that the load arm 70 is pulled to the solenoid 71 side.
The push arm 68 is rotated clockwise in FIG. 7 around the pin 67, and the protrusion 66 of the head load arm 66 is moved.
a is pushed upward against the force of the spring 72. As a result, the head load arm 66 is rotated clockwise in FIG. 4, the inner end 66b is lowered, and the head arm 74 locked via the protruding piece 74a can be freely lowered. The magnetic head 79 on the moving side descends according to the head arm 74 by the force of the torsion coil spring 78, and the magnetic head 80 facing the magnetic disk 12 with a small gap comes into contact with the magnetic disk 12.

Since the center of the head load arm 66 is rotatably supported by the pin 65, the amount of movement of the magnetic head 79 is about twice as large as the amount of movement of the cassette guide 24. 12.

When the magnetic disk cassette 1 is set in parallel with the above operation, the stepper motor 81
Is rotated, the lead screw 84 is rotated, the carriage 88 starts moving via the seek arm 86, and writing and reading of target information is performed.

On the other hand, when it is desired to take out the magnetic disk cassette 1, the front panel 18 of the eject lever 34
When the button B fixed to the tip of the bent portion 34e extending to the side is pressed, the eject lever 34 moves forward against the tensile force of the coil spring 38, and the arm 32 is moved by the projection 25e of the cassette discharge lever 25 in FIG. Is pressed to reach the lower side of the arm 33 of the lock arm 29 which is rotated clockwise, and is locked again by the hook 33a as the arm 33 descends.

On the other hand, the projecting piece 46a of the lock lever 46 is pushed as the eject lever 34 advances, so that the lock lever 46 is rotated counterclockwise about the pin 47 in FIG. It is separated from the edge 25d of the cassette discharge lever 25.

When the eject lever 34 moves forward, the pin 44 which has been located at the lowest position
Moves to the uppermost position of the cam hole 45 as shown in FIG. 5, so that the rotating plate 41 returns to the horizontal state.

When the rotating plate 41 is in the horizontal state, the pins 42
The cassette guide 24, which is connected via the..., Is also pulled upward, and the magnetic disk cassette 1 reaches the same level as when the loading was started.

In this state, since the locking of the edge 25 d of the cassette discharge lever 25 by the protruding piece 46 b of the lock lever 46 is released as described above, the cassette discharge lever 25 is pulled by the tensile force of the coil spring 28. The magnetic disk cassette 1 is suddenly drawn to the front panel 18 side, and the magnetic disk cassette 1 is pushed forward from the cassette insertion opening 18a by the bent portion 25d. Then, all the movable members follow the operation opposite to the above-described operation, and are in a state of waiting for the magnetic disk cassette to be mounted.

When the magnetic disk cassette 1 is taken out, the dustproof doors 19 and 20 are moved to the torsion coil spring 2.
As shown in FIG. 9, the cassette insertion port 18a is completely closed by the force of No. 3 as shown in FIG.

In the present embodiment, since the upper and lower dustproof doors 19 and 20 are partially overlapped with each other as described above, there is no gap between the upper and lower dustproof doors, and a sufficient dustproof effect can be achieved.

Further, the mounting state of the magnetic disk cassette is detected by a photo switch, a micro switch, or the like. However, in this embodiment, since the detection is performed by a leaf switch, the entire apparatus can be reduced in thickness. .

Since the center hub of the magnetic disk is clamped in conjunction with the mounting operation of the cassette,
There is no need to provide separate buttons and levers and operate them as in the conventional case, and secure clamping can be performed extremely easily.

Further, the movement of the moving-side magnetic head can be amplified and performed by devising the structure of the head load arm 66, so that the device can be made thinner.

Further, by using a lead screw as a mechanism for moving the carriage and connecting the lead screw and the stepper motor via a gimbal spring 83, play in the thrust direction is eliminated, thereby ensuring reliable operation and compactness of the apparatus. Can be realized.

Further, according to the present embodiment, immediately before the magnetic head 79 descending in conjunction with the cassette guide 24 when the magnetic disk cassette 1 is mounted, comes into contact with the magnetic disk 12, the head arm 74 to which the magnetic head 79 is attached is mounted.
The lowering of the magnetic head 79 is stopped by the mechanism below the head load arm 66, and the magnetic head 79 comes into contact with the magnetic disk 12 in response to the excitation of the solenoid 71 once. As a result, the magnetic head 79 contacts the magnetic disk 12 very gently, so that the magnetic heads 79 and 80 or the disk 12 can be prevented from being damaged by the impact of the contact.

[0083]

As is apparent from the above description, according to the disk device of the present invention, the disk drive mounted on the carriage is provided.
The second head is arranged to correspond to the position of the first head.
The head arm with the is mounted on the cassette guide.
By engaging with the engaged portion, the cassette guide is moved in conjunction with the transfer operation of the cassette guide from the first position at which the disk cassette can be inserted and removed to the second position at which recording or reproduction can be performed on or from a disk in the disk cassette. Since the second head moves in the direction of the disk surface, it is not necessary to dispose the head loading mechanism outside the moving range of the cassette guide, and the apparatus can be downsized.

Further, the second head follows the movement of the disk due to the transfer of the cassette guide from the first position to the second position without particularly controlling the timing of starting the movement of the second head. The second head does not come into contact with the disk before the disk reaches the recordable or playable position. Therefore, the head or the disk is not damaged by the head moving operation. further,
When the cassette guide is in the first position, the cassette
Data as the disc cassette is inserted into the
Open the disk cassette head window.
Has an opening member for moving the shutter of the cassette.
To insert the disc cassette into the cassette guide.
With the disc cassette head window open.
Can be released, and the device can be made thinner.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic disk cassette mounted on a magnetic disk device according to an embodiment of the present invention.

FIG. 2 is a plan view of the magnetic disk drive of the embodiment of the present invention.

FIG. 3 is a front view of the same device.

FIG. 4 is a front view of the apparatus with a front panel removed.

FIG. 5 is a side view of the same device.

FIG. 6 is a partial longitudinal side view of the same device.

FIG. 7 is a left side view of the same device.

FIG. 8 is a bottom view of the same device.

FIG. 9 is a side view illustrating the structure of a dustproof door of the device.

FIG. 10 is a side view illustrating the structure of a dustproof door of the device.

FIG. 11 is a partially enlarged longitudinal sectional side view illustrating the structure of a spindle of the apparatus.

FIG. 12 is a partially enlarged plan view of the device.

FIG. 13 is a side view showing a single door type and double door type dustproof door, respectively.

FIG. 14 is a side view showing a configuration in which a notch of the cassette is detected by a photocoupler and a microswitch.

FIG. 15 is an exploded perspective view illustrating a connection mechanism of a lead screw.

FIG. 16 is a side sectional view for explaining a connection mechanism of a lead screw.

FIG. 17 is a plan view of the gimbal spring.

[Explanation of symbols]

 Reference Signs List 1 magnetic disk cassette 2 hub 3 center hole 4 drive hole 12 magnetic disk 16, 17 side plate 18 front panel 18a cassette insertion slot 19, 20 dustproof door 23 torsion coil spring 24 cassette guide 25 cassette discharge lever 29 lock arm 34 eject lever 41 times Moving plate 42, 44 Pin 45 Cam hole 46 Lock lever 50 Leaf spring 53 Hub holder 54 Spindle 61 Motor 66 Head load arm 71 Solenoid 79, 80 Magnetic head 81 Stepper motor 83 Gimbal spring 84 Lead screw 86 Seek arm 88 Carriage 90 Leaf switch

Claims (1)

(57) [Claims] 1. A disk cassette having a shutter for opening and closing a head window for exposing a rotatably stored disk to the outside, wherein the head window is provided in a disk device.
A disk device for moving said shutter to open and close a disk, comprising: a first position at which said disk cassette is held; a first position at which said disk cassette can be inserted and removed; and a first position at which said disk can be recorded or reproduced . And a cassette guide transferred between the first position and the second position .
Insertion of the disc cassette into this cassette guide
So that the head window is opened as
An opening member for moving the cutter, a movably provided carriage, a first head attached to the carriage, and a biasing force toward the surface of the disk to move the carriage toward the carriage.
The attached head arm is attached to the head arm so as to correspond to the position of the first head, and the head arm engages with an engaging portion formed on the cassette guide, disk apparatus characterized by comprising a second head with the movement of the second position of the cassette guide.