JP3404853B2 - Disk cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a disk cassette.
Disk drive with an auto-injection function
The present invention relates to a disk cassette suitable for use in an electronic device. [0002] 2. Description of the Related Art A conventional disk cassette is shown in FIGS.
24. In FIG. 23 and FIG.
The disk cassette DK is for magneto-optical recording,
A disk-shaped magneto-optical disk 2 (disc)
C) is stored rotatably. Magneto-optical disk 2
The chucking hub 3 is fixed in the center, and this chuck
Of the disk drive device by the switching hub 3
Chucked by [0003] The case 1 comprises an upper half member 1a and a lower half portion.
Material 1b, the upper half member 1a and the lower half
The material 1b is joined in a state where it is abutted. Upper c
The opening is provided at the position where the lower half member 1b and the lower half member 1b face each other.
The parts 4 are respectively formed. Opening the upper half member 1a
A portion of the magneto-optical disk 2 is exposed from the opening 4 and
The opening 4 of the half member 1b is that of the upper half member 1a
From the opening 4, a part of the magneto-optical disk 2
And the chucking hub 3 is exposed. [0004] A shutter 5 is provided on the case 1 as shown in FIG.
24 and slidably provided in the direction of the arrow in FIG.
Both openings 4 are opened and closed by the shutter 5. This
One end of a torsion coil spring (not shown) is hooked to the cutter 5.
The shutter is driven by the spring force of the torsion coil spring.
5 is biased toward the open position. Also, shutter 5
A ridge 5a is protruded, and the bridge 5a is a case.
1 is arranged along the front end face 1c before insertion. [0005] Rear end side of the lower half member b in the cassette insertion
Positioning grooves 6 are formed at symmetrical positions of
The pair of positioning grooves 6 are inserted into the disk drive device.
Insert the positioning pins of the disc cassette
The unit is positioned. After inserting the cassette in Case 1
Erroneous erasure prevention member 7 is slidably provided in the hole on the end side.
Depending on the position of the erroneous erasure prevention member 7, the write
Whether to allow or not is selected. Furthermore, before inserting the cassette in Case 1
Recessed grooves 8 are formed at symmetrical positions on the end side.
The pair of recessed grooves 8 are formed on the lower surface side and the side surface of the case 1.
Open to the side. On the other hand, a disk drive device is shown in FIG.
As shown, a cassette holder 26 is provided.
The disk cassette DK is inserted into the holder 26. This
The cassette holder 26 has an auto-injection mechanism F
Provided by the auto-injection mechanism F
The disk cassette DK inserted into the slot holder 26
It is automatically drawn in from the middle. [0007] The auto-injection mechanism F has a first
Having an injection plate 33 and a first injection plate.
Port 33 is in the direction of arrows A and A 'with respect to cassette holder 26.
It is provided movably in the direction. The second injection
The rate 36 is a rotation support of the first injection plate 33.
With the shaft 35 as a fulcrum, it is rotatable in the directions of arrows B and B '.
Is provided. The power of the second injection plate 36
The support pin 34 of the cassette holder 26 is inserted into the groove 36a.
The second injection plate 36 is
A retracting pin 37 is provided. Third injection
The plate 38 supports a support shaft 40 of the cassette holder 26.
It is provided rotatably in the directions of arrows C and C 'as points.
The locking pin 39 at one end is used for the first injection plate 33.
It is locked to. Of the third injection plate 38
At the other end, a hold pin 41 is provided. The third b
The lock pin 39 of the object plate 38 and the cassette holder
A coil spring 43 is engaged between the support shaft 34 of the
And the third injection plate 38 is rotated in the direction of the arrow C.
Has been energized. [0008] The slide plate 12 is an unloader shown in FIG.
Between the dig position and the loading position in FIG.
A (not shown) slides in the directions of arrows A and A '.
And the spring force of the coil spring 15
To the loading position. Unrode
The locking pin 47 of the slide plate 12 is
Is locked to the lock claw plate 46 and
The injection holding piece 42 of the
Restricts rotation of hold pin 41 of eject plate 38
are doing. In the above configuration, the disk cassette DK
Is inserted into the cassette holder 26, as shown in FIG.
As described above, the end face 1c before the insertion pushes the shutter opening / closing pin 31
The shutter 5 is opened. Next, as shown in FIG.
The end face 1c before the insertion of the cassette DK is a lock claw plate.
Press the release lever 48 of the lock claw plate 44
D 'arrow direction against the spring force of the torsion coil spring 46
And the lock claw plate 44 is locked as shown in FIG.
It comes off from the pin 47. Then slide plate 1
2 is on the loading position side due to the spring force of the coil spring 15
(In the direction of the arrow A '), and the third injection
The contact plate 38 is driven by the spring force of the coil spring 43 so that C
Rotate in the direction of the arrow and the first injection plate
33 moves in the direction of arrow A. This first injection
The movement of the plate 33 causes the second injection plate 36
Is guided by the cam groove 36a and rotates in the direction of the arrow B.
As shown in FIG.
DK into the groove 8 for drawing in. In this state
The first injection plate 33 moves in the direction of arrow A.
Then, the disc cartridge locked to the cassette retraction pin 37
The set DK moves together and the disk cassette DK moves to the position shown in FIG.
As shown in FIG. [0010] SUMMARY OF THE INVENTION
According to the conventional disk cassette DK, the lower surface side of the case 1
And a recess groove 8 that opens to the side surface is simply provided.
Therefore, the standby position of the cassette retraction pin 37 is
The outside of the cylinder 26, which makes the device larger.
You. On the other hand, disk drive devices are assembled in computers, etc.
And the embedded space is reserved on the computer side.
Is set. Therefore, the disk in that space
When designing drive devices, cassettes must be
When the dimension up to the retraction pin 37 can be set to the maximum L
Then, on the other hand, from the center of the cassette holder 26,
Width L_TwoMust be set to a small value.
The width from the center of the cassette DK becomes smaller. Then
Since the diameter of the spectral magnetic disk 2 becomes smaller, the storage
The disadvantage is that the rear is smaller and the storage capacity is reduced.
Was. Accordingly, the present invention provides a cassette for the drive device.
Set the standby position of the draw-in pin inside the cassette insertion area.
Disk cassette to increase storage capacity
The goal is to provide a profitable budget. [0012] [MEANS FOR SOLVING THE PROBLEMS]
The disk cassette of the present invention makes it possible to rotate a disk freely.
Store in the case and disc dry
Cassette retraction pin is inserted during the insertion process
In a disk cassette provided with a drawing groove,
In the case, between the front end face of insertion and the groove for withdrawal,
An escape groove to avoid the cassette retraction pin in the standby position
EstablishmentOpening position of the relief groove with respect to the recess groove
The lower surface of the case with respect to the hooking surface of the recess groove.
In the width direction of the leaf. [0013] [Action]Disk cassettePosition of relief groove when inserting
Wait for the cassette pull-in pin on the disk drive unit side.
The width of the disc cassette is
It is not regulated by the slot pull-in pin. [0014] Embodiments of the present invention will be described below with reference to the drawings.
You. 1 to 8 show a first embodiment of the present invention.
You. FIG. 1 shows an oblique view of the disk cassette DK viewed from the lower surface side.
A view is shown. In FIG. 1, this disk cassette
On the lower surface side of case 1 of DK
Is provided with a pair of recessed grooves 8,
Between the front end face 1c of the half member 1b before insertion and the recess 8
An escape groove 9 is formed over the entire surface. And for retraction
The opening position of the escape groove 9 with respect to the groove 8
It is located in the width direction of the case 1 with respect to the stop surface 8a. other
Is the same as that of the conventional example.
The description is omitted. FIG. 2 uses the above disk cassette DK.
FIG. 1 is an exploded perspective view of a main part of a disk drive device that can be used.
ing. In FIG. 2, a slide
A plate 12 is arranged, and the slide plate 12
Guide pins 14 of the chassis 11 are inserted into the long holes 13
Have been. Slide plate 12 on guide pin 14
Guided unloading positions and diagrams in FIGS. 2 and 4
8 to be slidable between the loading positions
ing. The slide plate 12 and the guide pin 14
A coil spring 15 is hung between the coils.
The slide plate 12 is lowered by the spring force of the spring 15.
Biased toward the loading position. The auto eject mechanism A is on the chassis 11
At the drive force of the eject motor 16
The slide plate 12 located at the
Move to the unloading position against the spring force of 15
You. The disk rotating mechanism B is mounted on the chassis 11
The motor block 17 is provided so as to be movable up and down.
The motor block body 17 of FIG.
In the unloading position, the spring force of the coil spring 18
To the lower position,
In the sliding position, push with the inclined portion 19 of the slide plate 12.
It is raised and located in the ascending position. And in the raised position
Chucking of the disc cassette DK located at the mounting position
Chuck hub 3 for spindle motor rotation
Therefore, the magneto-optical disk 2 is set in a rotatable state. The cassette positioning mechanism C includes a chassis 11
It has a pin fixing block body 20 that can be raised and lowered
Then, this pin fixing block body 20 is
In the unloading position of No. 2, it is located in the descending position,
At the loading position of the guide plate 12, the slide
Is pushed up by the inclined portion 21 of the seat 12 and is positioned at the ascending position.
I do. A pair of left and right positioning for the pin fixing block body 20
pin22The pair of positioning pins 22 are
In the raised position, the disk cassette DK located at the mounting position is
Each is inserted into the positioning groove 6. The head mechanism D is mounted on the chassis 11
A head carriage 23 that moves in the
The magnetic head 24 is located above the head carriage
However, optical heads 25 are provided at the lower positions, respectively.
I have. The magnetic head 24 and the optical head 25 are vertically opposed.
And a mounting position between the heads 24 and 25.
Disk 2 of the disk cassette DK located at the position
Is located. The cassette holder 26 is located above the chassis 11.
And is fixed to the chassis 11.
The cassette holder 26 has an upper plate 26a and a lower plate 26b.
And the left and right side plates 26c.
Disk cassette in the rudder 26 (cassette insertion area)
DK is inserted. A motor block is provided on the lower plate 26b.
Large notch for entry of optical head 17, optical head 25, etc.
(Not shown), and a magnetic head is also provided on the upper surface plate 26a.
Notch 27 into which the pad 24 enters.
You. Further, the cassette stopper 2 is provided on the upper plate 26a.
The cassette stopper 28 is provided with a disc 8.
When the front end face 1c of the cassette DK abuts, the disc
The cassette DK is located at the mounting position. The cassette holder 26 has a
Shutter opening and closing mechanism E, auto-injection mechanism F and slide
A plate lock mechanism G is provided. The shutter opening / closing mechanism E is shown in detail in FIG.
Is formed on the upper plate 26a of the cassette holder 26.
The cam hole 30 and the cam hole 30
A shutter release pin 31 movable along the
It was hung between the cutter release pin 31 and the upper plate 26a.
And a torsion coil spring 32. Shutter open
The release pin 31 is started by the spring force of the torsion coil spring 32.
It is urged toward the end position (the position in FIG. 3). The auto-injection mechanism F is shown in FIG.
As shown in FIG.
A first injection plate 33 disposed on the surface side;
I do. The first injection plate 33 has the guide groove 3
3a are formed, and the lower surface plate 26b is formed in the guide groove 33a.
The guide shaft 34 is inserted. The first injection
The rate 33 is guided by the guide shaft 34
Move in the cassette insertion / removal direction (A, A 'arrow directions in FIG. 3).
Is configured. First injection plate 33
A rotation support shaft 35 is fixed to one end of the rotation support shaft.
A second injection plate 36 is rotatable on the shaft 35
It is provided in. This second injection plate 3
6, a cam groove 36a is formed.
The guide shaft 34 is inserted. Also, the second image
A cassette retraction pin 37 is provided on the eject plate 36.
The cassette retraction pin 37 is connected to the second injector.
The direction of the arrows B and B 'in FIG.
To rotate. Then, the cassette retracting pin 37 is
Displaced between the standby position and the retracted position in FIG.
The machine position is a position inside the width of the disk cassette DK.
Have been. The other end of the first injection plate 33
Is formed with a notch recess 33b.
Is engaged with the locking pin 39 of the third injection plate 38.
Has been stopped. The third injection plate 38 is
Is supported by the lower plate 26b via the support shaft 40.
3 and rotatably provided in the directions indicated by arrows C and C 'in FIG.
You. A locking pin 39 of the third injection plate 38
Is provided with a hold pin 41 at the opposite end.
Hold pin 41 is used to inject slide plate 12
The holding member 42 is engaged and disengaged. In addition, the third injection
Between the locking pin 39 of the rate 38 and the support shaft 34.
The spring 43 is engaged, and the third force is
The eject plate 38 is urged in the direction of arrow C. The slide plate lock mechanism G is shown in FIG.
As shown in detail, a lock claw plate 44 is provided.
The lock claw plate 44 is a lower plate 2 of the cassette holder 26.
3D with the support shaft 45 fixed to 6b as a fulcrum.
D 'is provided to be rotatable in the direction of the arrow. This lock
One end of a torsion coil spring 46 is hooked on the claw plate 44.
Due to this spring force, the lock claw plate 44 moves the arrow D.
It is urged in the direction of the mark. And lock claw plate 4
4 is a lock pin 47 of the slide plate 12 (shown in FIG. 2).
You. ). Also, the lock claw plate 44 has
A release lever portion 48 is provided. Next, the operation of the above configuration will be described. Sly
The lock pin 47 of the plate 12 has a lock claw play.
And is located at the unloading position
First, the injection holding piece 42 of the slide plate 12
To the hold pin 41 of the third injection plate 38
Locks to prevent rotation of third injection plate 38
Then, the cassette retraction pin 37 is located at the standby position. In this state, the disk cassette DK is
When inserted into the holder 26, first, as shown in FIG.
The front end face 1c of the disk cassette DK before the insertion is opened.
Press pin 31 and release pin 31
Moving along the cam hole 30 against the spring force of the spring 32
The shutter 5 is opened. Furthermore, the disk cassette DK
Is inserted into the cassette holder 26, as shown in FIG.
And the end surface 1C before the insertion of the disk cassette DK is released.
Press the lock part 48 to lock the torsion coil 44
It rotates in the direction of the arrow D 'against the spring force of the spring 46. Here, the cassette retraction pin 3 at the standby position
7 is positioned in the cassette holder 26 so as to protrude from the side.
To the disk cassette DK,
9 is formed, the disk cassette DK is
Insertion is allowed without hitting the slot pull-in pin 37.
Then, the cassette retraction pin 37 reaches the retraction groove 8. As shown in FIG. 6, the lock claw plate 44 is
When it comes off from the lock pin 47, the slide plate 12
A 'arrow direction (loading position)
Side), and this movement causes the third injection
The plate 38 is moved in the direction of the arrow C by the spring force of the coil spring 43.
Rotate. Rotation of this third injection plate 38
Moves the first injection plate 33 in the direction of arrow A.
And the second injection plate 36 moves in the direction of the arrow B.
And the cassette retraction pin 3 as shown in FIG.
7 enters the drawing groove 8 of the disk cassette DK.
Further, the first injection plate 33 is in the direction indicated by the arrow A.
Is moved to the position shown in FIG.
Press the hooking surface 8a of the disc cassette DK automatically.
It is drawn into the cassette holder 26. And in FIG.
As shown, the front end face 1c of the disk cassette DK before insertion is closed.
Inserted to the position where it comes into contact with the set stopper 28
The disk cassette DK is located at the mounting position. On the other hand, when the disk cassette DK is
After being positioned, the slide plate 12 continues to slide.
The sliding of the motor block body 17 and the pin
Both fixed block bodies 20 are displaced from the lowered position to the raised position
Is done. Then, chucking of the motor block body 17
Is the chucking hub 3 of the disc cassette DK.
And rotate the spindle motor to
The disk 2 is set in a rotatable state and the pin fixing block is
The positioning pin 22 of the disk body 20 is
Insert disk cassette DK into positioning groove 6
Is decided. As described above, the first embodiment is compared with the conventional example.
The cassette from the center of the device in FIGS.
When the dimension up to the retraction pin 37 is also set to L
In addition, the cassette holder 2 according to the first embodiment is compared with the conventional holder.
6 (disk cassette) width L from the center₁Take large
Can be Therefore, the magneto-optical disk 2
And the recording capacity can be increased. FIGS. 9 to 21 show a second embodiment of the present invention.
It is shown. FIG. 9 shows the disk cassette viewed from the bottom side.
A perspective view of the DK is shown. In FIG.
On the lower surface side of the case 1 of the disk cassette DK, a conventional example is provided.
A pair of recess grooves 8 is provided at the same position as
Furthermore, the insertion front end face 1c of the lower half member b and the recess groove
A clearance groove 9 is formed between the first and second grooves 8. And
The opening position of the escape groove 9 with respect to the drawing groove 8 is determined according to the first embodiment.
Unlike the example, the case 1
In the thickness direction. Other configurations are the same as the conventional example.
Therefore, the same reference numerals are given to the drawings and the description is omitted.
You. FIG. 10 shows the use of the disk cassette DK.
FIG.
11 includes a cassette holder 26 and a slide plate 12
Are respectively shown in perspective view. 10 and 11
In the drawings, parts having the same configuration as in the first embodiment will be described.
The same reference numerals are given and the description is omitted, and the parts having different configurations
Will be described only. That is, the auto-injection mechanism F
As shown in detail in FIG.
1st injection plate arrange | positioned at the lower surface side of 6b
50. This first injection plate 50
Connected to the vertical plate portion 50a and the front and rear sides thereof, respectively.
And horizontal plate portions 50b and 50c. Vertical pre
The cam hole 51 is formed at two places in the seat portion 50a.
Each cam hole 51 has a guide fixed to the cassette holder 26.
Doping pin 52 is inserted. The cam hole 51 is inserted in the cassette.
Long dimension in the removal direction and thickness direction of cassette holder 26
It has an inclined portion inclined in the direction. That is, the first injection
11 is slid in the directions of arrows A and A 'in FIG.
It is configured to move freely and move up and down in the process.
And is urged by the spring force of the coil spring 53 in the direction of arrow A.
Have been. The horizontal plate portion 50b has a power
A cassette retraction pin 55 is provided together with the set contact portion 54
Have been. The cassette retraction pin 55 is connected to the first injector.
11 and 13 by the movement of the object plate 50
And between the retracted position of FIG. 19 and FIG.
The standby position of the cassette retraction pin 55 is
It is located at a position where it slightly enters the DA 26. The other water
A notch 56 is formed in the flat plate portion 50c.
The notch recess 56 has a second injection plate 57
The stop pin 58 is locked. Notch recess 56 is locking pin
The size is set larger than 58. The second injection plate 57 is substantially
The center is supported by the lower plate 26b via the support shaft 59,
11 are provided rotatably in the directions of arrows C and C '.
The locking pin 58 of the second injection plate 57 is
At the opposite end, a hold pin 60 is provided.
The pin 60 is used to hold the slide plate 12 for injection.
It is disengaged by the holding piece 42. Also, the second injection play
Locking pin 58 of the guide 57 and the guide pin 14 of the chassis 11
And a coil spring 61 is hung between them.
The second injection plate 57 is attached in the direction of arrow C.
It is being rushed. The pin 62 on the slide plate 12
Is used to avoid interference between the coil spring 61 and the coil spring 15.
It is for Next, the operation of the above configuration will be described. Sly
The lock pin 47 of the plate 12 has a lock claw play.
And is located at the unloading position
First, the injection holding piece 42 of the slide plate 12
To the hold pin 60 of the second injection plate 57
Locks to prevent rotation of second injection plate 57
Then, the cassette retraction pin 55 is located at the standby position. In this state, the disk cassette DK is
12 and 13 when inserted into the holder 26.
First, the end face 1c before the insertion of the disk cassette DK is
Press the shutter release pin 31 and the shutter release pin 31
Along the cam hole 30 against the spring force of the torsion coil spring 32.
And the shutter 5 is opened. In addition, the disc
When the cassette DK is inserted into the cassette holder 26,
As shown in FIG. 14 and FIG.
The front end face 1c before insertion is the power of the first injection plate 50.
It contacts the set contact surface 54. Here, the cassette pull-in pin 5 at the standby position
5 is located at a position protruding from below into the cassette holder 26.
To the disk cassette DK,
9 is formed, the disk cassette DK is
Insertion is allowed without hitting the slot pull-in pin 55
Then, the cassette retraction pin 55 reaches the retraction groove 8. The cassette of the first injection plate 50
Disk cassette DK from the state in which the
Is further inserted, the first injection plate 5
0 moves in the direction of the arrow A in FIG. 11 against the coil spring 53
I do. Next, the end face 1c before the insertion of the disk cassette DK is
Press the release lever 48 and lock the claw plate 44 with the screw
Rotate in the direction of the arrow D 'against the spring force of the coil spring 46
I do. As shown in FIG. 16 and FIG.
When the rate 44 comes off the lock pin 47, the slide
Rate 12 is in the direction of arrow A 'by the spring force of coil spring 15
(Loading position side), and this movement
The second injection plate 57 is a spring of the coil spring 61.
Rotate in the direction of arrow C with force. This second injector
With the rotation of the rate 57, the first injection plate 50
A Moving in the direction of the arrow and displacing upward
The cassette pull-in pin 55 pulls the disk cassette DK.
It goes into the back (upward) of the groove 8 for insertion. Furthermore, the first
Inject plate 50 moves in the direction of arrow A
And the cassette retraction pin 55 is engaged with the retaining surface 8 of the retraction groove 8.
a, and the disc cassette DK is automatically
It is drawn into the rudder 26. 18 and FIG.
As shown in FIG.
Abutting against the cassette stopper 28 of the cassette holder 26
Insert the disc cassette DK until it hits the position
Position. On the other hand, when the disk cassette DK is
After being positioned, the slide plate 12 continues to slide.
The sliding of the motor block body 17 and the pin
Both fixed block bodies 20 are displaced from the lowered position to the raised position
Is done. Then, as shown in FIGS.
When the load plate 12 is displaced to the loading position,
The chucking part of the data block 17 is
Chucking the DK chucking hub 3 and spin
Magneto-optical disk 2 can be rotated by rotation of dollar motor
State and positioning of the pin fixing block body 20
Pin 22 is inserted into positioning groove 6 of disk cassette DK.
And the disk cassette DK is positioned. In the second embodiment, the cassette holder
The cassette retraction pin 55 is disposed below the
The width L from the center of the cassette holder 26 (shown in FIG.
You. ) Can be maximized. Also, cassette
The standby position of the retracting pin 55 is set to the lower surface of the cassette holder 26.
Can be set close enough to the drive
It is also used for thinning. FIG. 22 shows a lower surface side of the third embodiment of the present invention.
The perspective view of the disk cassette DK viewed from above is shown.
You. In FIG. 22, a pair is formed similarly to the first and second embodiments.
An escape groove 9 is formed for each of the recess grooves 8 for drawing in,
The opening position of each relief groove 9 is determined by two hooks of the recess groove 8.
It is located in the width direction and the thickness direction of the case 1 with respect to the stop surface 8a.
ing. Other configurations are the same as the conventional example, and
The same reference numerals are given and the description is omitted. In the third embodiment,
According to the disk cassette DK, in the first and second embodiments,
The disk drive devices shown can be used together. The disk cassette of the first to third embodiments
According to the DK, a pair of left and right recess grooves 8 are provided.
Is the disk drive device shown in the first and second embodiments.
In case of using it on one side, the recess 8 is provided only on one side.
Good. However, if a pair of left and right recess grooves 8 are provided,
A device with only one cassette retraction pin 37, 55
It can be used with any of the devices on both sides. In each of the above embodiments, the disk
Set DK is for magneto-optical recording, but for magnetic recording or optical
The present invention can be similarly applied to a recording device. [0048] As described above, according to the present invention, the digital
Escape groove between the draw-in groove of the cassette and the front end face of insertion
ProvidedThe opening position of the relief groove with respect to the
Position in the width direction of the lower half of the case with respect to the locking surface of the
I put itSo the cassette retraction pin standby position
As close as possible to the disc cassette insertion area.
To increase the size of the disc cassette.
There is an effect that the storage capacity can be increased and the storage capacity can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a disk cassette viewed from a lower surface side (first embodiment). FIG. 2 is an exploded perspective view of the disk drive device (first embodiment). FIG. 3 is a perspective view of a cassette holder and a slide plate (first embodiment). FIG. 4 is a plan view showing a state where the disk cassette is in contact with a shutter release pin (first embodiment). FIG. 5 is a plan view showing a state where the disk cassette is in contact with a release lever (first embodiment). FIG. 6 is a plan view of the slide plate in an unlocked state (first embodiment). FIG. 7 is a plan view showing a state in which a cassette retraction pin has entered a retraction groove (first embodiment). FIG. 8 is a plan view showing a state where the retraction of the disk cassette is completed (first embodiment). FIG. 9 is a perspective view of a disk cassette viewed from a lower surface side (second embodiment). FIG. 10 is an exploded perspective view of a disk drive device (second embodiment). FIG. 11 is a perspective view of a cassette holder and a slide plate (second embodiment). FIG. 12 is a plan view showing a state where the disk cassette is in contact with a shutter release pin (second embodiment). FIG. 13 is a side view showing a state where the disk cassette is in contact with a shutter release pin (second embodiment). FIG. 14 is a plan view showing a state where the disk cassette is in contact with the cassette contact portion (second embodiment). FIG. 15 is a side view of the state where the disk cassette is in contact with the cassette contact portion (second embodiment). FIG. 16 is a plan view of the slide plate in an unlocked state (second embodiment). FIG. 17 is a side view of the slide plate in an unlocked state (second embodiment). FIG. 18 is a plan view showing a state where the retraction of the disk cassette is completed (second embodiment). FIG. 19 is a side view showing a state where the retraction of the disk cassette is completed (second embodiment). FIG. 20 is a plan view showing a state where the slide plate is displaced to a loading position (second embodiment). FIG. 21 is a side view showing a state where the slide plate is displaced to a loading position (second embodiment). FIG. 22 is a perspective view of a disk cassette viewed from a lower surface side (third embodiment). FIG. 23 is a perspective view of a disk cassette viewed from the top side (conventional example). FIG. 24 is a perspective view of a disk cassette viewed from a lower surface side (conventional example). FIG. 25 is a plan view showing a state in which the disk cassette is in contact with a shutter release pin (conventional example). FIG. 26 is a plan view showing a state in which the disc cassette is in contact with a release lever (conventional example). FIG. 27 is a plan view of a slide plate in an unlocked state (conventional example). FIG. 28 is a plan view showing a state in which a cassette retraction pin has entered a retraction groove (conventional example). FIG. 29 is a plan view showing a state where the retraction of the disk cassette is completed (conventional example). [Description of Signs] DK: Disk cassette 1: Case 1c: Insertion front end surface 2: Magneto-optical disk (disk) 8: Retraction groove 8a: Hook surface 9: Escape groove 37, 55: Cassette retraction pin

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 23/03 604

Claims (1)

(57) [Claims] [Claim 1] A disk is rotatably housed in a case, and a draw groove is provided on an outer surface of the case, into which a cassette draw pin is inserted in a process of inserting the disk into a disk drive device. In the disc cassette, the case is provided with an escape groove between the front end face of the insertion and the recess groove for avoiding the cassette retract pin at a standby position, and the opening of the escape groove with respect to the retract groove is provided .
The position of the case is relative to the hooking surface of the recess groove.
A disc cassette characterized by being located in the width direction of the lower half .