JP2000357387A - Flexible disk drive and front panel used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the entrance of dust into an FDD. SOLUTION: An opening/closing member 32 for opening and closing a panel opening 31 of a front panel 30 mounted at the front end of the FDD has first and second shutters 81 and 82 freely turnably mounted thereto. The second shutter 82 opens only when a medium jacket 40 is inserted into the FDD and is closed when the medium jacket 40 is housed in the FDD. The first shutter 81 opens only when the medium jacket 40 housed in the FDD is discharged outside. As a result, even if the medium jacket 40 is in a chucking state, the internal space of the FDD may be made into a substantially hermetic state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible disk drive (hereinafter, also referred to as "FDD"), and in particular, to a large-capacity flexible disk (hereinafter, also referred to as "FD") (data recording / reproduction). (Possible) high-density type FDD.

[0002]

2. Description of the Related Art As is well known, a flexible disk drive is a device for recording and reproducing data on a magnetic disk medium of a flexible disk inserted (loaded) therein. Flexible disks are also called media jackets. In recent years, the capacity of flexible disks has been increased, and a flexible disk having a storage capacity of 1 to 2 Mbytes (hereinafter, referred to as a small capacity) has a storage capacity of 128 Mbytes (hereinafter, referred to as a large capacity). Flexible discs with the following have been developed. Along with this, a flexible disk drive capable of recording and reproducing data on such a large-capacity FD magnetic disk medium has been developed as a flexible disk drive. Furthermore, large capacity FD is 256M
, 512 Mbytes,...

[0003] In the following, a flexible disk drive capable of recording and reproducing data only on a magnetic disk medium having a large capacity FD is called a "high-density dedicated FDD".
A flexible disk drive capable of recording and reproducing data only on a magnetic disk medium having a small capacity FD will be referred to as "low-density dedicated FDD". Furthermore, a flexible disk drive capable of recording and reproducing data on both large-capacity and small-capacity FD magnetic disk media will be referred to as a "high-density / low-density FDD". The high-density exclusive FDD and the high-density / low-density dual-purpose FDD
Are collectively referred to as “high-density FDD”.

Now, low-density dedicated FDD and high-density FD
One of the major mechanical differences from D is in the configuration of the carriage driving means. The driving means is for moving a carriage supporting the magnetic head at the tip thereof in a predetermined radial direction (radial direction of the magnetic disk medium) with respect to the flexible disk inserted into the flexible disk drive. . That is, low-density exclusive type F
In the DD, a stepping motor is used as a driving unit, whereas in the high-density FDD, a linear motor such as a voice coil motor (VCM) is used as a driving unit.

Next, the voice coil motor used as the driving means of the high-density type FDD will be described in some detail. The voice coil motor includes a voice coil and a magnetic circuit. The voice coil is disposed behind a carriage that supports the magnetic head at its tip, and is wound around a drive shaft parallel to a predetermined radial direction. The magnetic circuit has a magnetic circuit for generating a magnetic field crossing the current flowing through the voice coil. With such a configuration, by causing a current to flow through the voice coil in a direction crossing the magnetic field generated by the magnetic circuit, a driving force is generated in the direction in which the drive shaft extends based on the interaction between the current and the magnetic field. . With this driving force, the voice coil motor moves the carriage along a predetermined radial direction.

A low-density exclusive type FDD and a high-density type FD
Another major difference from D is the rotation speed of the spindle motor that rotates the magnetic disk medium of the inserted flexible disk. That is, in the low-density dedicated FDD, the flexible disk to be inserted is limited to the small-capacity FD. Therefore, the spindle motor for that purpose drives the inserted magnetic disk medium at a low speed of 300 rpm or 360 rpm. You just need to rotate it. On the other hand, in a high-density FDD, the flexible disk to be inserted is a large-capacity FD.
Only, or both the large capacity FD and the small capacity FD. Therefore, when the inserted flexible disk has a large capacity FD, the high-density FDD spindle motor drives the magnetic disk medium at a rotation speed of 3600 rpm, that is, 12 to 1 times the rotation speed of the small capacity FD.
It must be rotated at 0 times the speed.

There is no apparent difference between the large capacity FD and the small capacity FD. However, since the large-capacity FD has a smaller track width (track pitch) than the small-capacity FD, it is difficult to position the magnetic head to a desired track as compared with the small-capacity FD. Therefore, large capacity F
A servo signal for position detection is written on the magnetic disk medium D in advance.

In order to access the flexible disk by the flexible disk drive, it is necessary to insert (load) the flexible disk into the flexible disk drive.

A conventional front panel 30 'mounted on the front end of a flexible disk drive will be described below with reference to FIG. In FIG.
(A) is a flexible disk (media jacket)
FIG. 4B is a schematic sectional view showing a state immediately before inserting the flexible disk drive 40 into the flexible disk drive, FIG. 4B is a schematic sectional view showing a state in which the flexible disk (media jacket) 40 is being inserted into the flexible disk drive, and FIG.
FIG. 1 is a schematic sectional view showing a state in which a flexible disk (media jacket) 40 is completely accommodated in a flexible disk drive.

The front panel 30 'has a panel opening 31' for inserting and removing a flexible disk (media jacket) 40, and one door (shutter) 32 'serving as an opening / closing member for opening and closing the panel opening 31'. I have. More specifically, the shutter 32 'has a substantially flat plate shape substantially covering the panel opening 31'. The shutter 32 'extends in the direction perpendicular to the insertion direction A of the media jacket 40 at the upper end side of the panel opening 31', and has a rotating shaft 321 'attached to the front panel 30'. Thus, the shutter 32 'is rotatably mounted around the rotation shaft 321'. The shutter 32 'is constantly urged in a direction opposite to the insertion direction A of the media jacket 40 by urging means such as a spring (not shown).

Therefore, in order to insert the flexible disk (media jacket) 40 into the flexible disk drive, a person holds the flexible disk (media jacket) and holds the front end of the door (shutter) 3.
While pressing against 2 ′ (FIG. 6A), the flexible disk (media jacket) 40 is inserted along the insertion direction A.
Is inserted into the flexible disk drive (FIG. 6B).

When the flexible disk (media jacket) 40 is completely accommodated in the flexible disk drive (FIG. 6 (C)), the flexible disk (media jacket) 40 includes a disk holder (not shown) and an eject plate. (Not shown) and the rear end of the flexible disk (media jacket) 40 is in contact with the free end 322 'of the door (shutter) 32'. . In other words, the door (shutter) 32 'of the front panel 30' is half open.

After the flexible disk (media jacket) 40 is accommodated in the flexible disk drive, the magnetic disk medium (not shown) of the flexible disk (media jacket) 40 is rotated by a drive motor (spindle motor) not shown. Let's say it started. At this time, a disk table (not shown)
Chucking pin (drive roller) protruding from
Is fitted into a chucking hole formed in a disk hub (not shown) for holding a magnetic disk medium, and the flexible disk (media jacket) 40 is in a chucking state.

[0014]

After the flexible disk (media jacket) 40 is completely housed in the flexible disk drive, the flexible disk (media jacket) 40 is placed in a chucking state, and the flexible disk (media jacket) is placed. The magnetic disk medium of the media jacket (40) becomes accessible by a magnetic head (not shown) of the flexible disk drive.

However, in this accessible state, as described above, the door (shutter) 32 'of the front panel 30' is half open. In other words, a gap is left in the flexible disk drive. Therefore, dust or the like enters the flexible disk drive through the gap. The entered dust and the like may adhere to the surface of the magnetic head or the magnetic disk medium of the flexible disk (media jacket) 40 and adversely affect them.

As a measure against dust, in a conventional flexible disk drive, a shield member (not shown) is provided between a disk holder and a cover, or an eject plate (not shown) and a flexible disk (media jacket) 40 are connected. A separate shield member (not shown) is provided between them to prevent dust from entering.

However, it is difficult to completely prevent dust from entering the flexible disk drive with only the dust-proof structure using such a shield member, and a small amount of dust enters the flexible disk drive. Will come.

On the other hand, a flexible disk (media jacket) 40 inserted into the flexible disk drive has a circular portion for rotating and driving a magnetic disk medium (media) at a central portion on the back side of a shell (not shown). Openings (not shown) are open. Therefore, there is a possibility that the small amount of dust that has entered may further enter the shell through the circular opening. In particular, when the flexible disk has a large capacity FD, the magnetic disk medium (media) rotates at a very high speed of 3600 rpm as described above. Will roll up. That is, not only dust near the circular opening, but also dust far away from it,
The high speed rotation of the media sucks into the shell through the circular opening.

Accordingly, an object of the present invention is to provide a flexible disk drive capable of preventing dust from entering the flexible disk drive.

[0020]

The present inventors employ any dustproof structure to prevent dust from entering the flexible disk drive even when the media jacket is in a chucking state. Various investigations were made as to whether or not it was better. The reason that dust enters the flexible disk drive in the first place is that, as described above, when the media jacket is in the chucking state, the front panel is in a half-open state, and a gap is formed in the flexible disk drive. .
Therefore, even when the media jacket is in the chucking state, if the front panel is closed,
The present inventors have noticed that the internal space of the flexible disk drive can be kept substantially sealed.

Whatever structure is adopted, even when the media jacket is in a chucking state,
The present inventors have continued to study whether the front panel can be closed. The conventional front panel 30 'has a single opening / closing member for opening and closing the panel opening 31' only with one shutter 32 '. If the opening / closing member is constituted by only one shutter 32 ', it is difficult to achieve the above object. Therefore, the present inventors have concluded that the above object should be achieved only by improving the opening / closing member. The present invention has been made based on such a result of study (inspiration).

That is, according to the present invention, a front panel is provided at a front end portion, and the front panel includes a panel opening for inserting and removing a media jacket, and an opening / closing member for opening and closing the panel opening. , The opening / closing member has a first shutter rotatably attached to the front panel, and a second shutter rotatably attached to the first shutter, wherein the second shutter is Opened only when the media jacket is inserted into the flexible disk drive, closed when the media jacket is housed in the flexible disk drive, and the first shutter ejects the media jacket housed in the flexible disk drive to the outside. Open only when you open the flexible disk drive Also contained media jacket is in the chucking state, the flexible disk drive is obtained which is characterized in that the substantially sealed state of the interior space of the flexible disk drive.

In the above-mentioned flexible disk drive, the first shutter has a substantially flat plate shape substantially covering the panel opening, has a shutter opening narrower than the panel opening, and has a lower end side of the panel opening. And has a first rotation axis extending in a direction perpendicular to the insertion direction of the media jacket and attached to the front panel, and the first shutter is mounted to be rotatable about the first rotation axis. The first shutter is constantly urged in the insertion direction of the media jacket by the first urging means,
The second shutter has a substantially flat plate shape substantially covering the shutter opening, extends in a direction perpendicular to the insertion direction of the media jacket at an upper end side of the panel opening, and has a first shutter. With a second pivot attached to the
The second shutter is rotatably mounted around a second rotation axis, and the second shutter is constantly urged by the second urging means in a direction opposite to the insertion direction of the media jacket. It is desirable to do so.

[0024]

The opening and closing member for opening and closing the panel opening of the front panel is a double-structured shutter mechanism comprising first and second shutters rotatably mounted.
Even when the media jacket is in the chucking state, the internal space of the flexible disk drive can be substantially closed.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, a flexible disk drive to which a front panel according to an embodiment of the present invention is applied will be described with reference to FIG. The illustrated flexible disk drive is a high-density / low-density FDD capable of recording and reproducing data on both a large-capacity FD magnetic disk medium and a small-capacity FD magnetic disk medium described later. FIG. 3 is a plan view showing the configuration of the high-density / low-density dual-purpose FDD. Fig. 3 shows a flexible disk
High-density / low-density FDD from the direction indicated by arrow A in the middle
Inserted inside.

The inserted flexible disk is held on a disk table 12 rotatably supported on the surface 11a of the main frame 11 with their central axes 0 aligned. The disk table 12 has a spindle motor (SPM) 6 provided on the main frame 11.
0, the magnetic disk medium of the flexible disk is rotated. A printed wiring board (not shown) on which a large number of electronic components are mounted is attached to the back surface of the main frame 11.

The high-density / low-density dual-purpose FDD is provided with a pair of upper and lower magnetic heads (not shown) for reading / writing data from / to a magnetic disk medium of a flexible disk. The magnetic head is supported at its tip by a carriage 15 via a gimbal 14. Magnetic head, gimbal 14, carriage 15, voice coil 17
(Described later) and FPC (Flexible Printed
The combination of the circuit, the scale, the spring holder and the spring is called a carriage assembly. The carriage 15 is arranged on the surface 11a of the main frame 11 so as to be separated from the main frame 11, and can move the magnetic head along a predetermined radial direction (the direction indicated by the arrow B in FIG. 3) with respect to the flexible disk. I support it.

The carriage 15 is supported and guided at a lower end on both sides by a pair of guide bars 16 extending in parallel to a predetermined radial direction B.

The carriage 15 is driven in a predetermined radial direction B by a voice coil motor (VCM) as described below. More specifically, the voice coil motor includes a pair of voice coils 17 and a magnetic circuit 20.
And The pair of voice coils 17 is
5 and is wound around a drive shaft (not shown) extending parallel to a predetermined radial direction B. The magnetic circuit 20 is for generating a magnetic field crossing the current flowing through the voice coil 17. In the voice coil motor having such a configuration, a current is caused to flow through the voice coil 17 in a direction crossing the magnetic field generated by the magnetic circuit 20, so that the direction in which the drive shaft extends based on the interaction between the current and the magnetic field. A driving force is generated. With this driving force, the voice coil motor moves the carriage 15 in the predetermined radial direction B.

The spindle motor 60 is connected to the main frame 1
1 is mounted on the surface 11a. The spindle motor 60 is provided with a spindle shaft 6 erected substantially perpendicularly to the main surface (surface) 11a of the main frame 11.
One. The spindle shaft 61 is rotatably supported on the main frame 11 via a ball bearing (not shown). This spindle shaft 6
Reference numeral 1 serves as a rotating shaft of the flexible disk inserted into the high-density / low-density dual-purpose FDD. The disk table 12 is fitted to the upper end of the spindle shaft 61.

FIGS. 4 and 5 show a large capacity FD, respectively.
It is the top view which looked at 40 from the surface side and the back side. FIG.
As shown in FIG. 5, the large-capacity FD 40 has a magnetic disk medium 41 as a magnetic recording medium, and a case (shell) 42 that covers the magnetic disk medium 41.

As shown in FIG. 5, a circular opening 42a is formed at the center of the back surface of the shell 42.
A disk hub (disk-shaped metal fitting) 43 for holding the magnetic disk medium 41 is loosely inserted through the circular opening 42a. The disk hub 43 has a disk center hole 43a in the center thereof through which the spindle shaft 61 passes.
In addition, a chucking hole (disc-side driving long hole) 43b through which a chucking pin (drive roller) to be described later is loosely formed is formed at a peripheral position shifted from the disk center hole 43a. In this specification, the combination of the magnetic disk medium 41 and the disk hub 43 will be simply referred to as “media”.

Returning to FIG. 3, the diameter of the disk table 12 is larger than the diameter of the disk hub 43 and smaller than the diameter of the circular opening 42a.

The disk table 12 is provided with a table-side driving slot 12a at a position corresponding to the chucking hole (disk-side driving slot) 43b. The spindle motor 60 has a chucking pin (drive roller) 62 that penetrates into the chucking hole 43b through the table-side driving slot 12a. The chucking pin 62 is vertically rotatable and rotatably mounted on a magnet case 63 mounted on the lower surface of the disk table 12. A substantially rectangular parallelepiped index detecting magnet 64 is fixed to an arbitrary position on the outer surface of the outer peripheral wall of the magnet case 63.

Referring again to FIGS. 4 and 5, large capacity F
When the shell 42 of D40 is viewed from the front side, a write protection hole 44 is formed in the left corner at the rear end in the insertion direction (right corner when viewed from the back side). I have. 4 and 5 show a state in which the write protection hole 44 is closed by the write protection tab 44a. The write protection tab 44a is slidable in the insertion direction, and the write protection hole 44 can be opened and closed by manually operating the write protection tab 44a. Write protection tab 4
When the write protection hole 44 is closed by 4a, recording is enabled, and when the write protection hole 44 is opened, recording is disabled.

The illustrated large capacity FD 40 shows an example in the case where there are two types of storage capacity (for example, 128 Mbytes and 256 Mbytes), but there is no difference in external form. A large-capacity identification detection hole 45 is formed near the write protection hole 44. The large-capacity identification detection hole 45 has a large capacity F
This is for distinguishing D40 from the small capacity FD. Further, the type identification detection hole 46 is replaced with the large-capacity identification detection hole 45.
At the same time, it is selectively formed near the write protection hole 44. The type identification hole 46 is for identifying the type of the large-capacity FD 40, and the type of the large-capacity FD 40 can be identified by the presence or absence of the hole 46. For example, when the storage capacity is a large capacity FD of 128 Mbytes, the case 42 is not provided with the hole 46 for type identification detection, and when the storage capacity is a large capacity FD of 256 Mbytes, The type identification detection hole 46 may be formed.

Although not shown, the large-capacity identification hole 45 is not formed in the small-capacity FD as is well known.

Returning to FIG. 3, high-density / low-density dual-purpose FD
In D, a switch unit 50 is further mounted on a printed wiring board (not shown) provided on the back surface of the main frame 11 at the left corner at the rear end in the insertion direction. The switch unit 50 includes a push switch. The switch unit 50 is for detecting the write protection hole 44, the large capacity identification detection hole 45, and the type identification detection hole 46.

More specifically, the switch unit 50
Are the write control switch 51 and the large capacity identification switch 5
2 and a type identification switch 53. The write control switch 51 is a switch for detecting the open / close state of the write protection hole 44, and is provided at a position corresponding to the write protection hole 44. The large capacity identification switch 52 is a switch for discriminating and detecting whether the inserted flexible disk is the large capacity FD 40 or the small capacity FD.
It is provided at a position corresponding to the large-capacity identification hole 45.
The type identification switch 53 is a switch for detecting the presence or absence of the type identification detection hole 46, and is provided at a position corresponding to the type identification detection hole 46.

Referring back to FIGS. 4 and 5, the large capacity FD4
0 has a shutter 47 slidable in the direction of arrow C.
The shutter window 47a is opened in the shutter 47.
The shutter 47 is urged by a spring member (not shown) in a direction opposite to the arrow C direction. The shell 42 has a head window 42b that allows the magnetic disk medium 41 to be accessed by the high-density / low-density FDD magnetic head.
Having. The head window 42b is covered with a shutter 47 as shown in the figure when the large-capacity FD 40 is not inserted into the high-density / low-density dual-purpose FDD.
As described later, when the large-capacity FD 40 is inserted into the high-density / low-density dual-purpose FDD, a protrusion of an eject lever of a lever unit described later engages with the right upper edge 47b (FIG. 4) of the shutter 47. Then, the shutter 47 is moved to the arrow C
Slide in the direction.

As shown in FIG. 3, the main frame 1
A lever unit 70 is rotatably provided near the carriage 15 on the front surface 11a. More specifically, the lever unit 70 has an eject lever 71 and a lock lever 72. Eject lever 71
Share a shutter drive mechanism element for opening and closing the shutter 47 (FIGS. 4 and 5) of the large capacity FD 40 and an ejector mechanism element for discharging the large capacity FD 40 from the high-density / low-density FDD. ing. The lock lever 72 is disposed near the carriage 15 and locks the carriage 15 during ejection.

The high-density / low-density dual-purpose FDD comprises an eject plate 21 slidably provided on the main surface 11a of the main frame 11 along the insertion direction A of the large-capacity FD 40 and the opposite direction. Eject plate 21
And a disk holder (not shown) for holding the inserted large-capacity FD 40. The upper surface of the high-density / low-density dual-purpose FDD is covered with a cover (not shown).

A front panel, which will be described later, is attached to the front end of the main frame 11 (flexible disk drive). An eject button 28 is provided on the front panel so as to be movable in the front-rear direction. The eject button 28 is fitted into a protrusion 214 that projects forward at the front end of the eject plate 21.

Referring to FIG. 1, a description will be given of a front panel 30 according to an embodiment of the present invention, which is attached to a front end of a main frame 11 (flexible disk drive). In FIG. 1, (A) is a front view,
(B) is a left sectional view taken along line II-II of (A),
FIG. 3C is a right sectional view taken along line III-III in FIG.

The front panel 30 has a panel opening 31 for inserting and removing a flexible disk (media jacket) such as a large capacity FD 40 into and from a flexible disk drive as shown in FIG. 3, and opens and closes the panel opening 31. An opening / closing member 32.

The opening / closing member 32 has a first shutter 81 rotatably mounted on the front panel 30 and a second shutter 82 rotatably mounted on the first shutter 81. The second shutter 32 opens only when the media jacket 40 is inserted into the flexible disk drive, and closes when the media jacket 40 is stored in the flexible disk drive. The first shutter 81 opens only when the media jacket 40 housed in the flexible disk drive is discharged to the outside. By providing the front panel 30 having the opening / closing member 32 having such a structure, even if the media jacket 40 accommodated in the flexible disk drive is in a chucking state, the internal space of the flexible disk drive is substantially sealed. Can be

More specifically, the first shutter 81 has a substantially flat plate shape substantially covering the panel opening 31 and has a shutter opening 811 narrower than the panel opening 31. The first shutter 81 is inserted in the insertion direction A of the media jacket 40 at the lower end of the panel opening 31.
And a first rotation shaft 810 attached to the front panel 30. That is, the first
The shutter 81 is mounted so as to be rotatable around a first rotation shaft 810 as shown by a thin line in FIGS. 1B and 1C. Further, the first shutter 81 is constantly urged in the insertion direction A of the media jacket 40 by a first spring 812 that functions as first urging means.

On the other hand, the second shutter 82 has a substantially flat plate shape so as to substantially cover the shutter opening 811. The second shutter 82 extends in the direction perpendicular to the insertion direction A of the media jacket 40 at the upper end side of the panel opening 31 and connects the second rotation shaft 820 attached to the first shutter 81 to the second shutter 82. Have. That is, as shown by the thin lines in FIGS. 1B and 1C, the second shutter 82
It is rotatably mounted around a second rotation shaft 820. Further, the second shutter 82 is moved by the second spring 822 acting as a second urging means.
0 is always urged in the direction opposite to the insertion direction A.

Next, referring to FIG. 2, the operation when inserting (loading) the media jacket 40 into the lexible disk drive via the front panel 30 shown in FIG. 1, and the media jacket 40 is accommodated in the flexible disk drive. The operation when the media jacket 40 is discharged to the outside via the front panel 30 will be described. 2A is a schematic cross-sectional view showing a state in which the media jacket 40 is being inserted into the flexible disk drive, and FIG. 2B shows a state in which the media jacket 40 is completely housed in the flexible disk drive. FIG. 3C is a schematic sectional view showing a state in which the media jacket 40 housed in the flexible disk drive is being discharged to the outside.

First, with reference to FIGS. 2A and 2B, the operation when the media jacket 40 is inserted (loaded) into the flexible disk drive via the front panel 30 shown in FIG. 1 will be described. I do.

In this case, a person inserts the media jacket 40 into the flexible disk drive along the insertion direction A while pressing the front end of the media jacket 40 against the second shutter 82. that time,
First, the second shutter 82 is moved to the second spring 822 (FIG. 1).
Around the second rotation shaft 820 (see FIG. 2).
(A), the shutter opening 811 is opened by rotating in the counterclockwise direction.
In a state substantially parallel to the surface 11a of the main frame 11 (FIG. 3). At this time, the media jacket 40 holds the disc holder and the eject plate 2.
1 (FIG. 3).

When the media jacket 40 is pushed forward by a predetermined distance, the shutter 47 of the media jacket 40 is pushed.
4 engages with the projection 71a (FIG. 3) of the eject lever 71. From this point (point), when the media jacket 40 is further pushed against the urging force of the eject lever spring 73 (FIG. 3) attached to the lever unit 70, the protrusion 71a of the eject lever 71 is Rotate clockwise. Accordingly, the shutter 47 of the media jacket 40 is
Slides in the direction of arrow C (FIG. 4) against the urging force of the spring member. Therefore, the shutter 47 allows the head window 4
Try to open 2b gradually. Then, immediately before the media jacket 40 is completely housed in the disk holder of the flexible disk drive, the shutter 47 completely opens the head window 42b.

Although the detailed mechanism is not shown, when the media jacket 40 is pushed until it reaches the final lock position, as shown in FIG. The media jacket 40 is completely accommodated in the disc holder in a state where the media jacket 40 is locked by the disc lock mechanism (not shown) while the media jacket 40 is locked. At this time, the engagement between the media jacket 40 and the free end of the second shutter 82 is released, and FIG.
As shown in (B), the second shutter 82 rotates the second rotation shaft 820 clockwise by the urging force of the second spring 822 to close the shutter opening 811. At this time, the eject plate 21 slightly advances in the direction opposite to the insertion direction A, so that the eject button 28 also slightly projects from the front panel 30 in the direction opposite to the insertion direction A.

Thereafter, the chucking operation is performed on the media jacket 40 as described above. Therefore, when the media jacket 40 is in the chucking state, as shown in FIG. 2B, the flexible disk drive is kept in a substantially sealed state.

Next, referring to FIGS. 2B and 2C, the media jacket 40 housed in the flexible disk drive is attached to the front panel 3.
The operation at the time of discharging to the outside through 0 will be described.

At this time, the person presses the eject button 28. Then, the eject plate 21 retreats in the insertion direction A, so that the locked state of the media jacket 40 by the disk lock mechanism is released. As a result, the disc holder moves up while holding the media jacket 40. At that time, the media jacket 40 is pushed out in the direction opposite to the insertion direction A by the urging force of the eject lever spring 73. Thereby, the media jacket 4
The shutter 47 of the media jacket 40 is closed by the urging force of the spring member 0, and the media jacket 40 is closed.
A force acts so that the rear end presses the first shutter 81. With this pressing force, the first shutter 81
It rotates around the first rotation shaft 810 (counterclockwise in FIG. 2C) against the urging force of the first spring 812 (FIG. 1). Thereby, as shown in FIG. 2C, the panel opening 31 is opened, and the media jacket 40 is discharged from the flexible disk drive to the outside. Thereafter, when a person removes the media jacket 40 from the flexible disk drive, the first shutter 81 rotates the first rotation shaft 810 clockwise by the urging force of the first spring 812 to close the panel opening 31. .

As described above, in this embodiment, when the media jacket 40 is in the chucking state, the first and second shutters 81 and 82 of the front panel 30 are in the closed state, and the flexible disk drive is substantially It is kept tightly closed. Therefore, it is possible to prevent dust from entering the flexible disk drive. As a result, the media jacket 40 becomes
And the large-capacity FD 40 as shown in FIG. 5, and even if the medium 41 rotates at a high speed, dust outside the flexible disk drive can be removed from the circular opening 42a.
Through the shell 42.

Although the present invention has been described with reference to the embodiment, it goes without saying that the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the case where the flexible disk drive is a high-density / low-density dual-purpose FDD is described as an example, but other types such as a high-density-only FDD and a low-density-only FDD are used. It is needless to say that the present invention can be applied to the flexible disk drive.

[0060]

As is clear from the above description, according to the present invention, the first and second pivotally mounted opening / closing members are attached to the front end of the flexible disk drive and open and close the panel opening of the front panel. The second shutter opens only when the media jacket is inserted into the flexible disk drive, and closes when the media jacket is accommodated in the flexible disk drive. Because it opens only when ejecting the media jacket housed inside,
Even when the media jacket housed in the flexible disk drive is in a chucking state, the internal space of the flexible disk drive can be substantially closed. This makes it possible to take measures against dust in the flexible disk drive with a simple structure and adding only a few components.

[Brief description of the drawings]

FIG. 1 is a diagram showing a front panel according to an embodiment of the present invention, wherein (A) is a front view, and (B) is a line II-II of (A).
(C) is a right sectional view taken along line III-III of (A).

FIG. 2 is a side sectional view for explaining an operation when a media jacket is inserted into or ejected from a flexible disk drive via a front panel shown in FIG.

FIG. 3 is a plan view showing a high-density / low-density dual-purpose FDD in which the front panel shown in FIG. 1 is attached to a front end portion.

FIG. 4 is a plan view of a large-capacity FD accessible from the high-density / low-density dual-purpose FDD shown in FIG.

FIG. 5 is a plan view of a large-capacity FD accessible from the high-density / low-density dual-purpose FDD shown in FIG.

FIG. 6 is a side sectional view for explaining the configuration and operation of a conventional front panel.

[Explanation of symbols]

 Reference Signs List 30 front panel 31 panel opening 32 opening / closing member 40 large capacity FD (media jacket) 81 first shutter 810 first rotation axis 811 shutter opening 812 first spring 82 second shutter 810 second rotation axis 812 Second spring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Eiichi Yoneyama 1601 Sakai, Atsugi-shi, Kanagawa Prefecture Mitsumi Electric Co., Ltd. (Reference) 5D046 AA16 BA03 BA04 BA06 FA05

Claims (5)

[Claims] 1. A flexible disk drive comprising a front panel at a front end, the front panel including a panel opening for taking a media jacket in and out, and an opening and closing member for opening and closing the panel opening. A first shutter rotatably attached to the front panel, and a second shutter rotatably attached to the first shutter, wherein the second shutter is the media jacket. Is opened only when it is inserted into the flexible disk drive, and is closed when the media jacket is housed in the flexible disk drive. The first shutter is provided with the media jacket housed in the flexible disk drive. Open only when discharging to the outside. Also stowed the media jacket in disk drive is in the chucking state, the flexible disk drive being characterized in that the substantially sealed state of the interior space of the flexible disk drive. 2. The first shutter has a substantially flat plate shape substantially covering the panel opening, has a shutter opening narrower than the panel opening, and has a lower end side of the panel opening. A first rotating shaft extending in a direction perpendicular to the insertion direction of the media jacket and attached to the front panel, wherein the first shutter rotates around the first rotating shaft. The first shutter is movably attached, and the first shutter is constantly urged in a direction in which the media jacket is inserted by a first urging means, and the second shutter substantially covers the shutter opening. A second rotating shaft extending in a direction perpendicular to the insertion direction of the media jacket at an upper end side of the panel opening, and attached to the first shutter. Have The second shutter is rotatably mounted around the second rotation axis, and the second shutter is moved in a direction opposite to the insertion direction of the media jacket by a second urging means. 2. The flexible disk drive according to claim 1, wherein the flexible disk drive is constantly energized. 3. The flexible disk drive according to claim 1, wherein the flexible disk drive is a high-density type flexible disk drive.
Or the flexible disk drive according to 2. 4. A front panel provided at a front end of a flexible disk drive, the front panel having a panel opening for taking a media jacket in and out, and an opening / closing member for opening / closing the panel opening. A first shutter rotatably attached to the front panel, and a second shutter rotatably attached to the first shutter, wherein the second shutter is the media jacket. Is opened only when it is inserted into the flexible disk drive, and is closed when the media jacket is housed in the flexible disk drive. The first shutter is provided with the media jacket housed in the flexible disk drive. Open only when discharging to the outside. Also the media jacket housed in Le disk drive is in the chucking state, the front panel and allows for the substantially sealed state an inner space of the flexible disk drive. 5. The first shutter has a substantially flat plate shape substantially covering the panel opening, has a shutter opening narrower than the panel opening, and has a lower end side of the panel opening. A first rotating shaft extending in a direction perpendicular to the insertion direction of the media jacket and attached to the front panel, wherein the first shutter rotates around the first rotating shaft. The first shutter is movably attached, and the first shutter is constantly urged in a direction in which the media jacket is inserted by a first urging means, and the second shutter substantially covers the shutter opening. A second rotating shaft extending in a direction perpendicular to the insertion direction of the media jacket at an upper end side of the panel opening, and attached to the first shutter. Have The second shutter is rotatably mounted around the second rotation axis, and the second shutter is moved in a direction opposite to the insertion direction of the media jacket by a second urging means. The front panel according to claim 4, wherein the front panel is constantly energized.