JP2521402B2 - 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 device, and more particularly to a disk device which is removably loaded with a disk cassette accommodating a disk as a recording medium to record and reproduce information.

[0002]

2. Description of the Related Art As a device of this type, there is a magnetic disk device for recording and reproducing information by removably mounting a magnetic disk cassette accommodating a magnetic disk of a magnetic recording medium.

A conventional magnetic disk device is provided with a so-called clamp mechanism that presses a center hub of a magnetic disk in a disk cassette toward a spindle that is rotationally driven.

[0004]

However, in such a device, after mounting the disc cassette in the device, the clamp is performed after another operation such as closing the door, turning the lever, or pushing the button. I was doing. For this reason, a large number of parts are required, resulting in an increase in size of the apparatus and a troublesome operation.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a disk device which does not require a troublesome operation and can perform reliable clamping with an extremely simple structure. .

[0006]

In order to solve the above-mentioned problems, the present invention provides a disk device using a disk cassette which rotatably accommodates a disk having a center hub, the disk cassette holding the disk cassette. A cassette guide that is transferred between a first position where the disc cassette can be inserted into and removed from the apparatus and a second position where recording or reproduction can be performed with respect to the disc in the disc cassette; Position, the spindle that engages with the center hub of the disk and drives the disk to rotate, one end of which is rotatably supported by the shaft attached to the frame of the device, and the other end of which is rotatably supported. A rotating member provided with a hub retainer via a leaf spring ;
And the rotating member has the cassette on its free end side.
Is engaged with the cassette guide, the rotary member rotates in conjunction with the transfer of the cassette guide from the first position to the second position, and the hub retainer presses the center hub of the disc toward the spindle. Adopted the configuration.

[0007]

According to this structure, the cassette guide is rotated in association with the operation of moving the disc cassette from the first position where the disc cassette can be inserted into and removed from the device to the second position where recording or reproducing can be performed on the disc. The moving member rotates, and the hub retainer presses the center hub of the disk toward the spindle.
That is, the disc clamping is automatically performed in association with the transfer of the cassette guide from the first position to the second position when the disc cassette is mounted on the apparatus, and is performed without any special operation.

[0008]

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 in a magnetic disk device according to an 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.

Further, a head window 5 is formed at a position near the mounting direction side of the cassette indicated by an arrow B,
Inside the head window 5, a dustproof shutter 6 is provided.
Is provided.

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

Reference numeral 11 is an index hole, and reference numeral 7 is 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 the magnetic disk device shown in FIG.

The magnetic disk device 15 according to the present invention has a pair of left and right side plates 16 and 17, and between the tips of both side plates,
A front panel 18 is provided, and an opening 18a (insertion opening) for inserting a cassette is formed in this panel 18.

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

In the single-opening system shown in FIG. 13 (a), when the dustproof door 19 is rotated around the shaft 21a, a depth of the 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 structure shown in FIGS. 9 and 10 is adopted.

That is, in FIG. 9 and FIG. 10, the upper dustproof door 19 is located in front of the lower dustproof door 20, and as shown in FIG. A bent portion 20a bent by a certain angle α 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 and a cassette is mounted. It is closed so that there is no gap when it is not present.

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 20 be 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.

A cassette ejection lever 25 is provided above the cassette guide 24. 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 downward at the tip of the cassette discharge lever 25.
"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.

A projecting piece 25e is provided at the end of the discharge lever 25 on the side plate 16 side. At a position where the projecting piece 25e can be engaged, the lock arm 29 is rotatable about the shaft 30. It is provided. Lock arm 2
A reference numeral 9 indicates a turning tendency in a counterclockwise direction in FIG. 5 at all times by a spring 31 stretched between a protrusion 16a at an end portion of the side plate 16 and two arms 3 facing upward and forward.
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 in the middle of the eject lever 34 between the elongated holes 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 is provided on the outer surface of the end of the eject lever 34 on the side of the lock arm 29, and the pin 39 is formed on the tip of the arm 33 of the lock arm 29. Is in a position where it can be engaged with.

Inside the front panel 18, side plates 16 and 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, the pins 42 projecting inward are rotatably supported by the projecting pieces 43 projecting from both side edges of the cassette guide 24, and the pins 42 rotate. The moving plate 41 and the cassette guide 24 are in an interlocking relationship.

A pin 44 is provided in the middle of the rotary plate 41 so as to extend toward the side plate 16. The pin 44 is formed in the vicinity of the upper end of the eject lever 34 and has a "V" shape. 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 near the side plate 16 near the cassette discharge lever 25. 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 is projectingly provided on an end edge of the lock lever 46 opposite to the pin 47, and a spring 49 bent in a "V" shape is provided between the pin 48 and the pins 26 and 27. The lock lever 46 is stretched, and always gives the lock lever 46 a habit of clockwise rotation in FIG. 2 about the pin 47.

The lock lever 46 is an end portion on the pin 48 side,
In addition, the protruding piece 4 is provided at the edge on the cassette ejection 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 plate spring 50 is fixed by a pin 51 to the center of the upper surface of the rotating plate 41.

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 attached below the hub retainer 53 so as to face 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. 2, the cassette guide 2
On the upper surface of 4, protrusions 64, 64 are provided so as to be opposed to each other in the cassette insertion direction on the side opposite to the cassette ejection lever 25, and a shaft 65 is laterally provided between the protrusions. A central portion of a head load arm 66 is rotatably supported on the shaft 65.

A projecting piece 66a projecting to the outside of the side plate 17 is provided at the outer end of the head load arm 66, and the pin 6 is provided outside the side plate 17 below the projecting piece 66a.
The push arm 68 is rotatably supported via the switch 7. The tip of the horizontal portion of the rotating arm 68 has the protrusion 66.
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 has a 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 projecting piece 66a of the head load arm 66 and the pin 67 and the pin 73 projecting from the side plate 17.
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. The block 7 in which the base end of the head arm 74 is rotatably supported by a seek arm side described later via a pin 75.
6 is connected via a screw 77. The block 76 is given a habit of turning counterclockwise in FIG. 6 by a torsion coil spring 78, and a moving side magnetic head 79 is fixed to the lower surface of the tip of the head arm 74.

The head arm 74 is formed of, for example, a leaf spring, and a projecting piece 74a is formed at the end of the head arm 74 on the side of the head load arm 66.
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 attached and a joint fitting 82 fixed to its output shaft. The holes 83a and 83b of the gimbal spring 83 are fitted in 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 onto 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 attached to the outside of the carriage 88, and the seek arm 8 of the carriage 88 is attached.
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.

Below the tip of the cassette guide 24, a pair of left and right leaf switches 9 is provided 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.

Here, in the method using the photocoupler shown in FIG. 14A, the light emitting portion 90a and the light receiving portion 90b need to correspond to the cutout portions 10 on both sides of the cassette 1, so that the mechanism is likely 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, when the method using the microswitch shown in FIG. 14B is used, the microswitch 90c can know the presence or absence of the cutout 10 through the pin 90d, so that one side of the cassette 1 corresponds to the cutout 10. The mechanism is simple. Further, since a member for emitting light is not required, power consumption may be small.

However, since the length dimension m of the microswitch 90c is large, the mounting thickness dimension 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 of the embodiment of the present invention constructed as above will be described.

Before mounting the magnetic disk cassette 1, 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 overlap each other, and the width of the doors is widened accordingly, and as shown in FIG. 10, the upper surface of the magnetic disk cassette 1 located above the shaft 21 and the cassette insertion opening 18a. The distance l3 between can be increased.

Therefore, the moment arm is lengthened, and the door is opened in a state with little discomfort, and the magnetic disk cassette can be mounted very easily.

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

The magnetic disk cassette 1 eventually contacts the bent portion 25d at the inner end of the cassette ejection lever 25, and advances it against the tensile force of the coil spring 28.

Eventually, the protrusion 2 of the cassette ejection 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 as the lock arm 29 is rotated causes the pin 3 to move.
Leave 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.

The pin 4 is moved along with the movement of the eject lever 34.
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 drive hole 4 and the drive 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 corresponds to the ratio of the distance 15 to the downward movement amount of the rotating plate 41 and the distance 17 from the shaft 40 to the hub retainer 53. Only amplified and performed.

When the magnetic disk cassette 1 reaches the mounting reference position in this way, the positioning pin P protruding on the substrate 54a side of the apparatus is fitted into the positioning hole 8 of the cassette.

On the other hand, as the cassette ejection lever 25 moves forward during the above operation, the protrusion 46 of the lock lever 46 is moved.
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.

Although the head load arm 66 also descends as the cassette guide 24 descends, the descending amount of the head arm 74 that descends accordingly is not so large, and the moving-side head 79 is located inside the magnetic disk cassette 1. The magnetic disk 12 is sandwiched between the magnetic disk 12 and the fixed-side magnetic head 80 while maintaining a slight gap.

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

On the other hand, when the magnetic disk cassette descends as described above and is 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 detected. Turns 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
3, the pulley 60 is rotated and the spindle 54 starts rotating. 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 retracts, so that the load arm 70 is retracted toward 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.

By the way, since the center of the head load arm 66 is rotatably supported by the pin 65, the moving amount of the magnetic head 79 is about twice as much as the moving amount of the cassette guide 24, so that the magnetic disk is surely moved. It comes into contact with 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 is used.
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 protrusion 46a of the lock lever 46 is pushed as the eject lever 34 moves forward, so that the lock lever 46 is rotated counterclockwise about the pin 47 in FIG. It moves away from the edge 25d of the cassette ejection lever 25.

When the eject lever 34 moves forward, the pin 44 which has been at the lowermost position of the cam hole 45 until now.
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 rotary plate 41 becomes horizontal, the pin 42
The cassette guide 24 connected through the magnetic disk cassette 1 is also pulled up, and the magnetic disk cassette 1 reaches the same level as when the mounting is started.

In this state, since the end edge 25d of the cassette ejection lever 25 is released from the protrusion 46b of the lock lever 46 as described above, the cassette ejection lever 25 is pulled by the tension force of the coil spring 28. The magnetic disk cassette 1 is suddenly attracted to the front panel 18 side, and the bent portion 25d pushes the magnetic disk cassette 1 forward from the cassette insertion opening 18a. 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.

By the way, when the magnetic disk cassette 1 is taken out, the dustproof doors 19 and 20 are twisted by the coil spring 2.
By the force of 3, the state is closed as shown in FIG. 9, and the cassette insertion opening 18a is completely closed.

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

Further, the detection of the mounting state of the magnetic disk cassette is performed by the photo switch, the micro switch, etc., but in the present invention, it is detected by the leaf switch, so that the whole apparatus can be made thin.

Further, since the center hub of the magnetic disk is clamped in tandem with the cassette mounting operation,
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 apparatus can be made thin.

Further, by using a lead screw as a mechanism for moving the carriage and connecting the lead screw and the stepper motor through a gimbal spring 83, there is no backlash in the thrust direction, and reliable operation and compactness of the apparatus are achieved. Can be realized.

Further, according to this embodiment, the eject button B for ejecting the magnetic disk cassette is arranged in the vicinity of the cassette insertion opening 18a of the front panel 18, but when the disk cassette is not inserted. As shown in FIG. 5, it slightly projects from the front panel 18, and largely projects from the front panel 18 only when the disc cassette is inserted. Therefore, the button B does not get in the way when the disc cassette is inserted, and the erroneous operation can be prevented.

[0082]

As is clear from the above description, according to the disk device of the present invention, the hub retainer provided on the rotating member via the plate spring is interlocked with the transfer of the cassette guide. Since the hub is configured to be pressed toward the spindle, a troublesome operation is not required, and reliable clamping can be performed extremely easily. Also,
A bearing mechanism is used to rotatably support the rotating member ,
Using a leaf spring to bias the hub retainer,
Since the biasing function is separated, the leaf spring
There are few restrictions on the bending angle, and there is great freedom in designing the leaf spring.
Excellent effect that had is obtained.

[Brief description of 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 device.

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

FIG. 9 is a side view illustrating the structure of the 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 dustproof door of a single opening type and a double opening type, 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 disc device using a disc cassette rotatably accommodating a disc having a center hub, wherein the disc cassette holds the disc cassette and the disc cassette can be inserted into and removed from the device and the disc cassette. A cassette guide which is transferred to and from a second position in which the disc can be recorded or played, and which engages the center hub of the disc when the cassette guide is in the second position, A spindle for rotating the disk; and a rotating member, one end of which is rotatably supported by a shaft attached to the frame of the apparatus, and the other end of which is provided with a hub retainer via a leaf spring . The rotating member has the cassette guide at its free end side.
And the hub retainer presses the center hub of the disc toward the spindle. The hub retainer rotates in association with the transfer of the cassette guide from the first position to the second position. A disk device characterized by being configured to.