JPH09306089A - High-density type flexible disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible disk drive which is capable of discriminating between a large-capacity flexible disk and a customary-capacity flexible disk. SOLUTION: This disk drive 40 is loaded with a first and a second switch unit 50, 60. The first switch unit 50 is provided with a write control switch 51 installed out the position corresponding to the write protect hole, a large- capacity discriminating switch 52 installed on the position corresponding to the large-capacity discriminating hole, and a first kind discriminating switch 53 installed on the position corresponding to the first kind discriminating and detecting hole. The second switch unit 60 is provided with a customary-capacity discriminating switch 61 installed on the position corresponding to the second kind discriminating and detecting hole, the second and the third kind discriminating switches 62, 63 respectively installed on the positions corresponding to the second and third kind discriminating and detecting holes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-density flexible disk drive capable of accessing a large-capacity flexible disk, and more particularly to a high-density flexible disk drive having a mechanism for distinguishing between a large-capacity flexible disk and a normal-capacity flexible disk. Regarding

[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 flexible disk. In recent years, the capacity of flexible disks has been increased, and those having a storage capacity of 1M to 2M bytes (hereinafter referred to as normal capacity) have been developed.
Devices having a storage capacity of 128 Mbytes (hereinafter referred to as large capacity) have been developed. Along with this, a flexible disk drive capable of recording and reproducing data on such a large-capacity flexible disk has been developed. Further, the capacity of the large-capacity flexible disk is being increased to 256 Mbytes, 512 Mbytes, ...

In the following, a flexible disk drive capable of recording and reproducing data only on a large-capacity flexible disk is called a high-density dedicated flexible disk drive, and a flexible disk drive capable of recording and reproducing data only on a normal-capacity flexible disk. The disk drive is usually referred to as a density-only flexible disk drive. Further, a flexible disk drive capable of recording and reproducing data on both large capacity and normal capacity flexible disks will be referred to as a high density / normal density combined type flexible disk drive. When the high-density dedicated flexible disk drive and the high-density / normal density combined-type flexible disk drive are not distinguished, they are simply referred to as the high-density flexible disk drive. Further, when the normal density dedicated type flexible disk drive and the high density / normal density combined type flexible disk drive are not distinguished from each other, they are simply referred to as a normal density type flexible disk drive.

One of the mechanical differences between a normal-density-type flexible disk drive and a high-density-type flexible disk drive is that a carriage holding a magnetic head is attached to a flexible disk inserted in the drive. On the other hand, the driving means moves along a predetermined radial direction. That is, while a stepping motor is used as a driving means in a normal-density type flexible disk drive, a linear motor such as a voice coil motor (VCM) is used as a driving means in a high-density type flexible disk drive. I have.

Next, a voice coil motor used as a driving means of a high-density type flexible disk drive will be described in some detail. Voice coil motors are disposed on both rear sides of the carriage, and are wound around a drive shaft parallel to a predetermined radial direction, and a magnetic circuit for generating a magnetic field crossing a current flowing through the boil coil. And With such a configuration, by causing a current to flow through the boil coil in a direction crossing the magnetic field generated by the magnetic circuit, a driving force is generated in the extending direction of the drive shaft 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.

By the way, the conventional large-capacity flexible disk has the same outer shape as that of the normal-capacity flexible disk, and in the case of both 3.5 inch, the lateral, vertical and thickness dimensions are 90 mm, 94 mm and 3. Three
mm flat rectangular shape.

Further, as is well known, there are two types of normal capacity flexible disks, a first type having a storage capacity of 1 Mbyte and a second type having a storage capacity of 2 Mbyte.
In the normal density dedicated type flexible disk drive, it is necessary to identify whether the inserted normal capacity flexible disk is the first type or the second type. Therefore, as will be described below with reference to the drawings, the case of the second type normal capacity flexible disk has a second
A second type identification detecting hole for distinguishing the normal capacity flexible disk of the type 1 from the normal capacity flexible disk of the first type is provided. FIG. 4 shows the outer shape of the first type normal capacity flexible disk 20, and FIG. 5 shows the outer shape of the second type normal capacity flexible disk 30.

First, the structure of the first type normal capacity flexible disk 20 will be described with reference to FIG. The illustrated first type normal capacity large capacity flexible disk 20 is shown in a state of being inserted in a normal density type flexible disk drive (not shown).

The first type of normal capacity flexible disk 20 comprises a disk-shaped magnetic disk medium 21, a case 22 covering the magnetic disk medium 21, and a shutter 23 slidable in the direction of arrow A in the figure. The shutter 23 has a window 23a. The shutter 23 is biased by a spring member (not shown) in the direction opposite to the arrow A direction. When the shutter 23 slides in the direction of arrow A, the window 23a of the shutter 23 is located above the opening 22a provided in the case 22 as shown in FIG.
The magnetic disk medium 21 can be accessed by the magnetic head (not shown) of the normal density type flexible disk drive via the.

The case 22 is substantially 90 mm, 94 mm and 3.3 mm in width, length and thickness respectively.
mm flat rectangular shape. The case 22 is formed with a chamfered portion 24 for preventing reverse insertion (inserted with the front and back or front and back reversed) at the right corner at the tip in the insertion direction, and write protection at the left corner at the rear end in the insertion direction. Hole 25
Is empty. Although not shown, the case 22
On the back surface of the writing protection tab, a writing protection tab slidable in the insertion direction is provided at a position corresponding to the writing protection hole 25. The write protection hole 25 can be opened and closed by manually operating the write protection tab. When the write protection hole 25 is closed by the write protection tab, recording is possible, and when the write protection hole 25 is opened, recording is not possible.

On the other hand, the normal density type flexible disk drive is provided with a write control switch (not shown) at a position corresponding to the write protection hole 25 in order to detect the open / close state of the write protection hole 25. First type normal capacity flexible disk 2 depending on the on / off state
Permit / prohibit writing to 0.

Next, the structure of the second type normal capacity flexible disk 30 will be described with reference to FIG.
The illustrated second type normal capacity large capacity flexible disk 30 is also shown in a state of being inserted in a normal density flexible disk drive (not shown).

The second type normal capacity flexible disk 30 basically has the same structure and outer shape as the first type normal capacity flexible disk 20 described above. That is, the second type normal capacity flexible disk 30 has a disk-shaped magnetic disk medium 31, a case 32 that covers the magnetic disk medium 31, and a shutter 33 that is slidable in the direction of arrow A in the figure. And shutter 3
3 has a window 33a. The shutter 33 is biased by a spring member (not shown) in the direction opposite to the arrow A direction. When the shutter 33 slides in the direction of arrow A, as shown in FIG.
The magnetic disk medium 31 is located above the opening 32a provided in the magnetic disk medium, and the magnetic disk medium 31 can be accessed by the magnetic head (not shown) of the normal density type flexible disk drive through the opening 32a.

Similar to the case 22 of the first type normal capacity flexible disk 20 described above, the case 32 is substantially 90 m in width, length and thickness.
It has a flat rectangular shape of m, 94 mm, and 3.3 mm. The case 32 has a chamfered portion 34 for preventing reverse insertion (inserted with the front and back or the front and back reversed) at the right corner at the tip in the insertion direction, and write protection at the left corner at the rear end in the insertion direction. A hole 35 is provided.

Unlike the case 22 of the first type normal capacity flexible disk 20 described above, the case 32 has the second type normal capacity flexible disk 30 and the first type normal capacity flexible disk 30 at the right corner at the rear end in the insertion direction. A second mold identification detection hole 36 for identifying the mold of the normal capacity flexible disk 20 is provided.

In the normal density type flexible disk drive, in order to detect whether the inserted flexible disk is the first type or the second type, the second type identification detecting hole 36 is provided. A normal capacity identification switch (not shown) is provided at the position. That is, if the normal capacity identification switch detects that there is the second type identification detection hole 36, the inserted flexible disk can be identified as the second type normal capacity flexible disk 30, and If it is detected that there is no type identification detection hole 36, it can be identified that the inserted flexible disk is the normal capacity flexible disk 20 of the first type.

[0017]

As described above, in the normal density type flexible disk drive, the inserted normal capacity flexible disk is divided into the first type and the second type depending on the presence or absence of the second type identification detecting hole 36. It is possible to identify which type of. However, the conventional large-capacity flexible disk is not provided with means for distinguishing between the large-capacity flexible disk and the normal-capacity flexible disk. Therefore, even if a conventional large capacity flexible disk is inserted into a high density flexible disk drive, whether the inserted flexible disk is a normal capacity flexible disk or a large capacity flexible disk in the high density flexible disk drive. Cannot be identified.

Therefore, in view of the above-mentioned conventional problems, an object of the present invention is to provide a high-density flexible disk drive provided with a mechanism capable of distinguishing a normal capacity flexible disk from a large capacity flexible disk. .

Another object of the present invention is to provide a high-density flexible disk drive having a mechanism capable of identifying the storage capacity of a large-capacity flexible disk even if the storage capacity is plural.

[0020]

According to the present invention, a case for accommodating a magnetic disk medium is provided, and one large-capacity identification for distinguishing a large-capacity flexible disk from a normal-capacity flexible disk is provided in the case. A high-density flexible disk drive capable of accessing the large-capacity flexible disk having a detection hole, wherein a high-capacity identification switch is provided at a position corresponding to the large-capacity identification detection hole. Type flexible disk drive is obtained.

In the high-density flexible disk drive, the large-capacity flexible disk has a plurality of types having different storage capacities, and the case has a type identification detection hole for identifying the type of the large-capacity flexible disk. Is further selectively opened, and the type of the large capacity flexible disk can be identified by the number and position of the type identification detection holes, a type identification switch is provided at the corresponding position of the type identification detection hole. You may prepare.

Further, according to the present invention, a case for accommodating the magnetic disk medium is provided, and the case is provided with a large capacity discriminating and detecting means for discriminating between the large capacity flexible disc and the normal capacity flexible disc. In a high-density flexible disk drive capable of accessing the large-capacity flexible disk, a high-density flexible disk drive is provided, in which a large-capacity identifying means is provided at a position corresponding to the large-capacity identifying and detecting means. To be

[0023]

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

A large-capacity flexible disk accessible by the high-density flexible disk drive according to the present invention will be described with reference to FIG. The illustrated large-capacity flexible disk 10 is shown in a state of being inserted in a high-density flexible disk drive (not shown), and shows an example in which the storage capacity is 2 ³ = 8 types.

The large-capacity flexible disk 10 includes a disk-shaped magnetic disk medium 11 and the magnetic disk medium 1.
1 has a case 12 and a shutter 13 slidable in the direction of arrow A in the figure. The shutter 13 has a window 13a. The shutter 13 is biased by a spring member (not shown) in the direction opposite to the arrow A direction. Shutter 1
When 3 slides in the direction of arrow A, as shown in FIG.
The magnetic disk medium 11 is located at the upper part of the magnetic disk medium 2a, and the magnetic disk medium 11 can be accessed by a magnetic head (not shown) of a high-density flexible disk drive described later through the opening 12a.

The case 12 is substantially 90 mm, 94 mm and 3.3 mm in width, length and thickness, respectively.
mm flat rectangular shape. The case 12 is formed with a chamfered portion 14 for preventing reverse insertion (inserted with the front and back or front and back reversed) at the right corner at the front end in the insertion direction, and write protection at the left corner at the rear end in the insertion direction. Hole 15
Is empty. The reference numeral 16 at the right-hand corner of the rear end of the case 12 in the insertion direction is a second type normal capacity flexible disk 30 (FIG. 5) and a first type normal capacity flexible disk 20 (FIG. 4). 2 shows a position (hereinafter, referred to as a second mold identification detection hole position) where a second mold identification detection hole 36 (FIG. 5) for identifying is to be formed, and a hole is formed at this position. It may or may not have a hole.

The case 12 is provided with one large capacity identification detecting hole 17 for identifying the large capacity flexible disk 10 and the normal capacity flexible disk. In the illustrated example, the large-capacity identifying hole 17 is provided in the vicinity of the write protection hole 15. In addition, Case 1
Reference numeral 2 denotes first to third type identification detection holes 18-1 and 18 for identifying the type of the large capacity flexible disk.
-2 and 18-3 are selectively left open. The type of the large capacity flexible disk can be identified by the presence or absence of the first to third type identification detection holes 18-1 to 18-3. For example, in the case of a large capacity flexible disk having a storage capacity of 128 Mbytes, the case 12
First to third holes 18-1 to 18-3 for type identification detection
For a large-capacity flexible disk having a storage capacity of 256 Mbytes, a large-capacity flexible disk having a storage capacity of 512 Mbytes is formed by forming only the first type identification detection hole 18-1 in the case 12. , The case 12 has a second type identification detection hole 18-
If you try to leave only 2 open, you can have a maximum of 8
The type of storage capacity can be identified. In other words,
The type of the large capacity flexible disk can be identified by the number and position of the type identification detection holes.

In the illustrated example, the first type identification detection hole 1
8-1 is a write protection hole 1 together with a large capacity identification hole 17.
5, the second and third type identification detection holes 18-2 and 18-3 are provided at the second die identification detection hole position 16
Is provided in the vicinity of.

Referring to FIG. 1, a high-density flexible disk drive 4 according to an embodiment of the present invention which can access the large-capacity flexible disk 10 shown in FIG.
0 will be described. In FIG. 1, (a) is a plan view,
(B) is a front view, (c) is a left side view, and (d) is a right side view.

High-density flexible disk drive 4
0 has a disc holder unit 41 for holding the large-capacity flexible disc 10 and an eject button 42 for ejecting the inserted large-capacity flexible disc 10. Incidentally, 43 is an eject plate, and 44 is an eject switch. The eject switch 44 is provided immediately after the eject button 42 is operated.
In addition, the data write inhibit signal is generated before the eject mechanism (not shown) actually starts the operation.

High-density flexible disk drive 4
In No. 0, first and second switch units 50 and 60 are mounted on the printed wiring board (not shown) at the left and right corners at the rear end in the insertion direction, respectively. Each of the first and second switch units 50 and 60 comprises a push switch.

The first switch unit 50 is for detecting the write protection hole 15, the large capacity identification hole 17 and the first type identification detection hole 18-1, and the second switch unit 60. Is the second mold identification detection hole position 16
Also, the holes 18-2 and 18-3 for detecting the second and third type identifications are detected.

More specifically, the first switch unit 50 is inserted with the write control switch 51 provided at the corresponding position of the write protection hole 15 in order to detect the open / closed state of the write protection hole 15. In order to identify and detect whether the flexible disk is the large capacity flexible disk 10 or the normal capacity flexible disk,
In order to detect the presence / absence of the large capacity identification switch 52 provided at the corresponding position of the large capacity identification hole 17 and the first type identification detection hole 18-1, the first type identification detection hole 18-1
And a first type identification switch 53 provided at the corresponding position.

On the other hand, in the second switch unit 60, whether the inserted flexible disk is of the first type or the second type
In order to discriminately detect whether or not the type is a normal type discrimination switch 61, a normal capacity discrimination switch 61 provided at a corresponding position of the second type discrimination detection hole 16, a second and third type discrimination detection hole 18-2, In order to detect the presence or absence of 18-3, the second and third type identification switches 62 provided at the corresponding positions of the second and third type identification detection holes 18-2 and 18-3, respectively.
And 63.

Depending on the ON / OFF state of the write control switch 51, writing / writing to the large capacity flexible disk 10 is permitted / prohibited. If the normal capacity identification switch 61 detects that there is the second type identification detection hole 36 (FIG. 5), the inserted flexible disk can be identified as the second type normal capacity flexible disk 30,
If it is detected that there is no second die identification detection hole 36,
It can be identified that the inserted flexible disk is the first type normal capacity flexible disk 20. If the large-capacity identification switch 52 detects that the large-capacity identification hole 17 is present, the inserted flexible disk can be identified as the large-capacity flexible disk 10, and it is detected that the large-capacity identification hole 17 is not present. Then, the inserted flexible disk can be identified as a normal capacity flexible disk. First to third type identification switch 5
Up to eight types of storage capacities can be identified by the on / off states of 3, 62, and 63.

In the above embodiment, the first and second
Although push switches are used as the switch units 50 and 60, other switches such as an optical system switch may be used. Further, in the above-described embodiment, the write control switch 51, the large capacity identification switch 52 and the first type identification switch 53 are integrally formed as the first switch unit 50, and the normal capacity identification switch 61 and the second and the second identification units are formed. 3 type identification switches 62 and 6
Although 3 and 3 are integrally formed as a second switch unit, these switches may be formed separately.

The large-capacity flexible disk to which the present invention is applied is not limited to the one shown in FIG. 2, and for example, a large-capacity identifying hole 17 and a first large-capacity identifying hole 17 as shown in FIG.
To a large-capacity flexible disk 10A in which the positions of the third type identification detection holes 18-1 to 18-3 are changed
But it is good. That is, the large-capacity flexible disk 10
In A, the large-capacity identification hole 17 and the first type identification detection hole 18-1 are provided in the vicinity of the second type identification detection hole position 16, and the second and third type identification detection holes 18- 2 and 1
8-3 is provided near the write protection hole 15.

Furthermore, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications and changes can be made without departing from the gist of the present invention. For example, a large-capacity flexible disk to which the present invention is applied has a large-capacity identifying hole 17 alone or a large-capacity identifying hole and a type identifying detecting hole as shown in FIG. 2 or FIG. 1
5 and / or in the vicinity of the second type identification detection hole position 16, the position of the hole is not limited to these, and any position where the magnetic disk medium 11 does not exist may be used. The shape of these holes may be arbitrary. Further, when it is only necessary to distinguish between the large capacity flexible disk and the normal capacity flexible disk, only the large capacity identification switch 52 for detecting the presence / absence of the large capacity identification detection hole 17 is sufficient. The first to third type identification switches 53, 62 and 63 for detecting the presence or absence of the three type identification detection holes 18-1 to 18-3 are not necessary.

Further, means other than the holes may be used as the means for detecting and detecting the large capacity provided on the large capacity flexible disk. For example, instead of holes, notches may be made in the case 12, notches may be provided only in the lower surface of the case 12, or a reflective surface may be provided in the lower surface of the case 12.

[0040]

As is clear from the above description, the high-density flexible disk drive according to the present invention has a large-capacity identification detection hole (large-capacity identification) for distinguishing between a large-capacity flexible disk and a normal-capacity flexible disk. Since a large-capacity identification switch (large-capacity identification means) is provided at the corresponding position of the detection means), it is possible to easily identify whether the inserted flexible disk is a normal-capacity flexible disk or a large-capacity flexible disk. it can.

Further, a type identification detection hole for identifying the type of the large capacity flexible disk is further selectively formed in the case, and the type of the large capacity flexible disk is identified by the number and position of the type identification detection holes. If possible, by providing a type identification switch at the corresponding position of the type identification detection hole, the type of the inserted large capacity flexible disk can be identified.

[Brief description of drawings]

FIG. 1 is a diagram showing a high-density flexible disk according to an embodiment of the present invention, in which (a) is a plan view, (b) is a front view, (c) is a left side view, and (d) is a right side view. Is.

FIG. 2 is a plan view showing an example of a large capacity flexible disk to which the present invention is applied.

FIG. 3 is a plan view showing another example of a large-capacity flexible disk to which the present invention is applied.

FIG. 4 is a plan view showing a first type normal capacity flexible disk.

FIG. 5 is a plan view showing a second type of normal capacity flexible disk.

[Explanation of symbols]

 40 high-density flexible disk drive 50 switch unit 51 write control switch 52 large capacity identification switch 53 type identification switch 60 switch unit 61 normal capacity identification switch 62, 63 type identification switch

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshinori Tanki 1601 Sakai, Atsugi, Kanagawa Mitsumi Electric Co., Ltd. Atsugi Plant

Claims (9)

[Claims] 1. A large-capacity storage device comprising a case for accommodating a magnetic disk medium, wherein one large-capacity identification detection hole for distinguishing between the large-capacity flexible disk and the normal-capacity flexible disk is formed in the case. A high-density flexible disk drive capable of accessing a flexible disk, wherein a high-capacity identification switch is provided at a position corresponding to the large-capacity identification detection hole. 2. The large-capacity identification detection hole is provided in the vicinity of the write protection hole, and the large-capacity identification switch is integrated with a write control switch for detecting the open / closed state of the write protection hole. The high-density flexible disk drive according to claim 1, wherein the high-density flexible disk drive is formed. 3. The normal capacity flexible disk comprises:
There are two types, a first type having a storage capacity of 1 Mbytes and a second type having a storage capacity of 2 Mbytes, and the case of the second type normal capacity flexible disk has the second type.
A second type of discriminating between a normal capacity flexible disk of the first type and a normal capacity flexible disk of the first type
Is provided in the vicinity of the position where the second type identification detection hole is to be formed, and the large capacity identification switch is 2. The high-density flexible disk drive according to claim 1, wherein the high-density flexible disk drive is formed integrally with a normal capacity identification switch for detecting the presence or absence of the type identification detection hole 2. 4. The large-capacity flexible disk includes a plurality of types having different storage capacities, and a type identification detection hole for identifying the type of the large-capacity flexible disk is further selectively formed in the case. The type of large-capacity flexible disk can be identified by the number and position of the type identification detection holes, and a type identification switch is provided at a position corresponding to the type identification detection hole. The high-density flexible disk drive described in. 5. The large-capacity identification hole and the type identification detection hole are both provided in the vicinity of the write protection hole, and the large-capacity identification switch and the type identification switch are provided in the write protection hole. The high-density flexible disk drive according to claim 4, wherein the high-density flexible disk drive is formed integrally with a write control switch for detecting an open / closed state. 6. The normal capacity flexible disk comprises:
There are two types, a first type having a storage capacity of 1 Mbytes and a second type having a storage capacity of 2 Mbytes, and the case of the second type normal capacity flexible disk has the second type.
A second type of discriminating between a normal capacity flexible disk of the first type and a normal capacity flexible disk of the first type
A hole for type identification detection is provided, and both the large-capacity identification hole and the type identification detection hole are provided in the vicinity of the position where the second type identification detection hole is to be provided, and The large capacity identification switch and the type identification switch are integrally formed with a normal capacity identification switch for detecting the presence or absence of the second type identification detection hole,
5. The high density type flexible disk drive according to claim 4. 7. The normal capacity flexible disk comprises:
There are two types, a first type having a storage capacity of 1 Mbytes and a second type having a storage capacity of 2 Mbytes, and the case of the second type normal capacity flexible disk has the second type.
A second type of discriminating between a normal capacity flexible disk of the first type and a normal capacity flexible disk of the first type
Of the type identification detection holes are provided, the large capacity identification hole and the type identification detection hole are near the write protection hole and the position where the second type identification detection hole is to be opened, respectively. And the large capacity identification switch is formed integrally with a write control switch for detecting the open / closed state of the write protection hole, and the type identification switch is the second type identification detection hole. The high-density flexible disk drive according to claim 4, wherein the high-density flexible disk drive is formed integrally with a normal capacity identification switch for detecting the presence or absence of the presence or absence. 8. The normal capacity flexible disk comprises:
There are two types, a first type having a storage capacity of 1 Mbytes and a second type having a storage capacity of 2 Mbytes, and the case of the second type normal capacity flexible disk has the second type.
A second type of discriminating between a normal capacity flexible disk of the first type and a normal capacity flexible disk of the first type
Of the type identification detection holes, the large capacity identification hole and the type identification detection hole are near the position where the second type identification detection hole is to be formed and near the write protection hole, respectively. The large capacity identification switch is integrally formed with a normal capacity identification switch for detecting the presence or absence of the second type identification detection hole, and the type identification switch is the write protection hole. 5. The high-density flexible disk drive according to claim 4, wherein the high-density flexible disk drive is formed integrally with a write control switch for detecting the open / closed state of. 9. A large-capacity flexible disk provided with a case for accommodating a magnetic disk medium, wherein the case is provided with a large-capacity identification detecting means for distinguishing between the large-capacity flexible disk and the normal-capacity flexible disk. A high-density flexible disk drive, wherein a high-capacity identifying means is provided at a position corresponding to the large-capacity identifying and detecting means.