JPH1139836A - Large-capacity disk cartridge and disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a large-capacity disk cartridge from being inserted erroneously into a small-capacity disk drive by means of an extremely simple constitution. SOLUTION: A slope 15 is formed on an upper shell 3 in a corner part 11 on the front end face 5a and the right side face of a cartridge 5 at a large- capacity floppy disk cartridge L2. An erroneous-insertion preventive face 17 which is parallel to the front end face 5a is formed on a lower shell 4 in the corner part. The contact amount B with reference to the cartridge 5 of the erroneous-insertion preventive means of a large-capacity floppy disk drive is constituted to be at 1/2 or lower of the thickness of the cartridge 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk cartridge using a 3.5-inch diameter floppy disk, and more particularly to a large capacity disk cartridge and a floppy disk for recording and reproducing the large capacity disk cartridge. The disk drive belongs to the technical field of preventing erroneous insertion in a large capacity disk drive.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 26, this is an example of a small-capacity disk cartridge, and a small-capacity floppy disk cartridge using a small-capacity floppy disk S1 having a diameter of 3.5 inches, which is a disk-shaped recording medium. In S2, the recording capacity of the small-capacity floppy disk S1 is set to a small capacity of 1 to 2 MB (megabyte). The small-capacity floppy disk cartridge S2 forms a flat, substantially square-shaped cartridge 5 by upper and lower shells 3, 4 formed of a synthetic resin, and the small-capacity floppy disk S1 is rotatable in the cartridge 5. Stored in.

At this time, the center core 1a of the small-capacity floppy disk S1 is loosely fitted in a center core hole 6 formed in the center of the lower shell 4, and a cartridge 5 indicated by an arrow a in a floppy disk drive described later. Front end face 5a, which is the end on the insertion direction side, and the center core hole 6
Between the elongated hole shaped pair of upper and lower head insertion holes 7 along the cartridge center P ₁ is formed in the upper and lower shells 3 and 4. The pair of upper and lower head insertion holes 7
In order to open and close the shutter, a shutter 8 having a U-shaped cross section is arranged on the front end 5a side so as to be overlapped on the upper and lower sides of the upper and lower shells 3, 4, and the shutter 8 is arranged along the front end face 5a. It is slidably attached in the directions of arrows c and d which are perpendicular to the direction of the arrow a which is the insertion direction. The shutter 8 is slid in the direction of arrow c to the closed position by a built-in spring (not shown). In the lower shell 4 of the cartridge 5, a pair of left and right positioning reference holes 9 are formed at positions deviated toward the front end surface 5 a, and the left and right side surfaces 5 b, 5 c of the cartridge 5 A pair of left and right semicircular recesses 10 is formed at a position close to the front end face 5a side of the lower shell 4. And this cartridge 5
In the corner portion 11 between the front end surface 5a and the right side surface 5b as one side surface, a slope 12 which is a so-called C surface formed by cutting the entire upper and lower shells 3, 4 at 45 ° is formed. A write protector 13 for preventing erroneous erasure is incorporated at a position near the corner between the rear end face 5e of the cartridge 5 and the left side face 5c as the other side face.

Conventionally, as shown in FIGS. 17 to 25, a small-capacity floppy disk drive S21 which is a small-capacity disk drive for recording and reproducing the small-capacity floppy disk cartridge S2 is made of a sheet metal or the like. A front panel 23 formed of a synthetic resin or the like is attached to the front end of the pressed chassis 22, and a cartridge insertion port 24 having a horizontally long hole shape is formed on the upper side of the front panel 23, and an ejection port is formed on the lower side. Button 2
5 are projected. The chassis 22 has a bottom plate portion 22.
a and left and right side plate portions 2 vertically raised from both sides thereof
2b are integrally formed.

[0005] Inside the front panel 23, a horizontal cartridge holder 26 pressed by a sheet metal or the like and a slide plate 27 horizontally arranged below the chassis 22 are incorporated in the chassis 22. The cartridge holder 26 is formed integrally with a horizontal top plate 26a and a pair of left and right cartridge support portions 26b which are substantially L-shaped and are symmetrically bent downward from both left and right sides thereof. Is formed integrally with a bottom plate portion 27a and left and right side plate portions 27b vertically raised from both left and right sides thereof. The slide plate 27 is slidable in the directions of arrows a and b, which are the front and rear directions, using the bases of the pair of left and right positioning reference pins 28 and the height reference table 29 formed on the bottom plate portion 22a of the chassis 22 as guides. A slide plate spring 30, which is constituted by a tension coil spring and is a means for urging the slide plate 27 to slide in the direction of arrow b, is mounted between the chassis 22.

The right side, which is one side of the rear end (the direction of the arrow a) of the bottom plate 22a of the chassis 22, is formed of a synthetic resin or the like that locks the slide plate 27 at the slide position in the direction of the arrow. The trigger arm 31 is attached rotatably about the fulcrum shaft 32 in the directions of arrows e and f. A trigger arm spring 33 composed of a torsion coil spring, which is means for urging the trigger arm 31 to rotate in the direction of arrow e, is provided. It is mounted around a fulcrum shaft 32.

The cartridge holder 26 is moved by sliding the slide plate 27 in the directions of arrows a and b in FIG.
22 and a holder elevating mechanism 34 that is driven up and down in parallel with the arrows g and h, which are the up and down directions, between the up position shown in FIG. 22 and the down position shown in FIG. A total of four guide pins 35 formed by burring or the like at the front and rear ends in a cylindrical shape, and the left and right side plate portions 2 of the slide plate 27
A pair of left and right cartridges of the cartridge holder 26 are formed perpendicularly to the left and right side plate portions 22b of the chassis 22 and are formed at a total of four inclined guide grooves 36 formed at the front and rear ends of the cartridge holder 26 to drive the four guide pins 35 up and down. Support part 2
6b, a pair of left and right vertical guide grooves 38 for vertically guiding a pair of left and right guide projections 37, which are pressed at substantially the center in the front-rear direction.

On the top plate 26a of the cartridge holder 26, an erroneous insertion preventing means S40 is mounted at a position deviated to one side, that is, the right side.
The erroneous insertion preventing means S40 shown here is constituted by a torsion coil spring 41. The torsion coil spring 41 is locked by a spring locking portion 42 on the top plate portion 26a by a coil portion 41a, and one end portion 41b is connected. A stopper end 41c extending substantially in the direction of arrow b and bent vertically downward from the tip of one end 41b thereof passes through an opening 43 formed in a substantially L shape over the top plate 26a and one of the cartridge support portions 26b. It is inserted vertically into the inside of one of the cartridge support portions 26b from above. Also,
The other end 41d of the torsion coil spring 41 is connected to the top plate 26a.
It is locked by the upper spring locking portion 44. Accordingly, the stopper end 41c of the one end 41b of the torsion coil spring 41
Are movable in the left and right directions of the arrows i and j in one of the cartridge support portions 26b of the cartridge holder 26. However, the stopper end 41c is urged to move in the direction of the arrow i by the spring force applied to the one end 41b. And this stopper end 4
The contact amount A of the small-capacity floppy disk cartridge 1c of 1c is substantially the same as the thickness T of the cartridge 5 as a whole. However, the thickness of each of the upper and lower shells 3 and 4 is 1 / 2T.

[0009] Then, on the bottom plate 22a of the chassis 22, the front side of the chassis center P ₂ (arrow b direction)
The spindle motor 51 and the disk table 52 arranged at the upper end of the spin torque 51a are arranged at the position deviated from the spindle motor 51. In addition, this spindle motor 5
1 is mounted on a printed circuit board 53 which is horizontally screwed below the bottom plate portion 22a of the chassis 22, and an escape opening 54 for the disk table 52 is formed substantially in the center of the slide plate 27.

On the bottom plate portion 22a of the chassis 22,
The offset position on the rear side of the chassis center P ₂ (the arrow a direction side), the head moving mechanism moves the pair of upper and lower magnetic heads 56 arrow a along the chassis center P _2, in the direction b 57 Is arranged. The head moving mechanism 57 includes a head moving member 58 in which a pair of upper and lower magnetic heads 56 are attached to the upper and lower ends of the carrier and the arm, and a stepping motor 59 that moves the head moving member 58 in the directions of arrows a and b. And lead screw 6
0 and a guide shaft (not shown) of the head moving member 58 in the directions of arrows a and b.

An erasure prevention switch 6 composed of a push switch is provided on the front end of the printed circuit board 53.
1, a cartridge switch 62 and a recording capacity identification switch 63 are mounted, and an external interface 64 as a connector is mounted on the rear end of the printed circuit board 53.

Conventional small capacity floppy disk cartridge S2 and small capacity floppy disk drive S
At the time of loading, the front end face 5a of the cartridge 5 of the small-capacity floppy disk cartridge S2, as shown by the solid line in FIG.
The small-capacity floppy disk cartridge S2 is inserted into the small-capacity floppy disk drive S21 from the cartridge insertion port 24 with the arrow a in the correct direction in which the front surface is turned forward (toward the direction of arrow a) and the slope 12 is arranged on the right side. Insert horizontally in the direction. (Hereinafter, this is referred to as normal insertion.)

Then, as shown in FIG. 21, between the pair of left and right cartridge support portions 26b, below the top plate portion 26a in the cartridge holder 26 which has been raised parallel to the direction of arrow g to the up position. The small capacity floppy disk cartridge S2 is inserted horizontally from the direction of arrow a.

At the time of the normal insertion, when the small capacity floppy disk cartridge S2 is inserted in the direction of the arrow a in the cartridge holder 26 to the position shown by the one-dot chain line in FIG. Stopper end 41 of one end 41b of torsion coil spring 41
The slope 12 of the cartridge 5 of the small-capacity floppy disk cartridge S2 is brought into contact with c in the direction of arrow a by the contact amount A.

At this time, the stopper end 41c has one end 4c.
23b, the small-capacity floppy disk cartridge S2 is inserted into the cartridge holder 26 in the direction of the arrow a, although it is urged to move in the direction of the arrow i by the spring force applied to the cartridge 1b. With the insertion, the guide end of the three slopes 12 causes the stopper end 41c to escape in the direction of the arrow j, which is the right outside of the cartridge 5, against the spring force of the one end 41b. The capacity floppy disk cartridge S2 is directly inserted horizontally into the cartridge holder 26 in the direction of arrow a.

On the other hand, when inserting the small-capacity floppy disk cartridge S2, the front and rear end surfaces 5a and 5e of the cartridge 5 are reversed, and the left and right side surfaces 5b and 5c are inserted.
24, the inclined surface 12 of the cartridge 5 is connected to the stopper end 41c of the one end 41b of the torsion coil spring 41, as shown in FIG.
And the front end face 5a of the cartridge 5
The left end and the rear end surface 5e of the first contact portion abut on the stopper end 41c at a contact amount A substantially perpendicularly from the direction of the arrow a.

At this time, the stopper end 41c is connected to one end 4
By the spring force of the 1b are biased movement in the direction of arrow i, and, because of its deflection angle θ in the direction of arrow i against perpendicular reference line P ₃ with respect to the cartridge 5, the rear end surface 5e and the like When the stopper end 41c comes into contact with the stopper end 41c in the direction of arrow a, the stopper end 41c cannot escape at all in the direction of arrow j, and the stopper end 41c moves in the further direction of arrow a of the small-capacity floppy disk cartridge S2. Will be prohibited. That is, the stopper end 41c of the one end 41b of the torsion coil spring 41 constituting the erroneous insertion prevention means S40 prevents erroneous insertion of the small capacity floppy disk cartridge S2 into the small capacity floppy disk drive S21 in the wrong direction. .

When the small-capacity floppy disk cartridge S2 is correctly inserted into the cartridge holder 26 in the correct direction from the direction of arrow a, as shown in FIG. And the trigger arm 31 is rotated about the fulcrum shaft 32 in the direction of arrow f against the trigger arm spring 33. Then, the trigger arm 31 slides the shutter 8 in the direction of arrow d against the built-in spring along the front end face 5a of the cartridge 5 to open the pair of upper and lower head insertion holes 7. Immediately after these head insertion holes 7 are fully opened, the left end of the front end face 5a of the cartridge 5 is brought into contact with the cartridge stopper 26c formed with the cartridge holder 26, so that the small capacity floppy disk cartridge S2 is inserted. At almost the same time, the arc-shaped lock portion 31a integrally formed with the trigger arm 31 is
7 in the direction of arrow f from the locked portion 27c, which is a small projection integrally formed on the right side of the rear end side (the direction of arrow a) of the bottom plate portion 27a.

Then, at that moment, the holder elevating mechanism 3
The lock of the slide plate 27 of No. 4 is released, and the slide plate 27 is slid in the direction of arrow b by the slide plate spring 30 from the slide position in the direction of arrow a shown in FIG. 19 to the slide position shown in FIG. As a result, FIG.
As shown in FIG. 2, a total of four inclined guide grooves 36 of the slide plate 27 are displaced in the direction of the arrow b with respect to a total of four guide pins 35 of the cartridge holder 26, and a pair of left and right guide projections 37 is formed on the left and right of the chassis 22. While being guided vertically in a pair of vertical guide grooves 38, the cartridge holder 26 is moved by a total of four inclined guide grooves 36 as shown in FIG.
From the up position shown in FIG. 22 to the down position shown in FIG.

Then, the cartridge 5 of the small-capacity floppy disk cartridge S2 is fitted to a pair of left and right reference pins 28 on the chassis 22 by a pair of left and right reference holes 9 and is placed on a pair of left and right height reference stands 29. It is placed horizontally. Then, the center core 1a of the floppy disk 1 is chucked on the spindle 51a of the spindle motor 51 and the disk table 52, and the pair of upper and lower magnetic heads 56 of the head moving mechanism 57 is inserted into the pair of upper and lower head insertion holes 7 of the cartridge holder 26. And a pair of upper and lower magnetic heads 56
Is brought into contact with the upper and lower surfaces of the floppy disk 1 to complete the loading. Then, after the loading is completed, the floppy disk 1 is driven to rotate at a predetermined rotation speed by the spindle motor 51, and the pair of upper and lower magnetic heads 56 is moved from the center of the floppy disk 1 by the stepping motor 59 of the head moving mechanism 57. Are moved in the directions of the arrows a and b along the line, and the recording and reproduction of the floppy disk 1 are performed.

At the time of ejection, the eject button 2
5 is pushed in the direction of arrow a, and the slide plate 27 is
19 slides in the direction of the arrow a against the slide leaf spring 30 from the slide position in the direction of the arrow b shown in FIG. Then, by the reverse operation at the time of loading, the cartridge holder 26 is moved by the slide plate 27 as shown in FIG.
Then, the center core 1a of the floppy disk 1 is released from the down position shown in FIG. 21 to the up position shown in FIG. Then, the trigger arm 31 is moved by an arrow e by a trigger arm spring 33.
The lock portion 31a is rotated in the
7, and the slide plate 27 is locked again to the slide position in FIG. Then, the small-capacity floppy disk cartridge S2 is pushed out of the cartridge insertion port 24 of the small-capacity floppy disk drive S21 by the trigger arm 31, while the shutter 8 is closed in the direction of arrow c.

[0022]

By the way, manufacturers of such floppy disk cartridges and floppy disk drives require that the external dimensions and shape of the cartridge be the same as those of the conventional small-capacity floppy disk cartridges, A large-capacity floppy disk cartridge in which the recording capacity of a disk has been increased from the conventional 1-2 MB to 100 MB or more, and a large-capacity floppy disk drive for recording and reproducing the cartridge have been developed. In a large-capacity floppy disk of 100 MB or more, the track width of a recording track is reduced from about 130 μm to 8 μm or less, and the thickness of a magnetic layer is also reduced from about 0.2 to 3 mm to 1 μm.
m or less, and the durability of the large-capacity floppy disk is significantly reduced. In proportion thereto, the surface roughness of the large-capacity floppy disk becomes significantly smaller than that of the conventional floppy disk.

Therefore, this large-capacity floppy disk
When a cartridge is inserted into a conventional small-capacity floppy disk drive, the durability of the large-capacity floppy disk is low. However, there is a possibility that the large capacity floppy disk is seriously damaged. Also, since the surface roughness of a large-capacity floppy disk is extremely small, the small-capacity floppy disk drive may be left for a long time with the large-capacity floppy disk sandwiched from above and below by a pair of upper and lower magnetic heads. Then, there is a possibility that the magnetic head sticks to the surface of the large-capacity floppy disk, and the magnetic head sticks to the surface of the large-capacity floppy disk, causing serious damage to the large-capacity floppy disk.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can prevent a large capacity disk cartridge from being erroneously inserted into a small capacity disk drive with an extremely simple structure. It is an object of the present invention to provide a large-capacity disk cartridge and a large-capacity disk drive.

[0025]

According to the present invention, there is provided a large-capacity disk cartridge according to the present invention, wherein the cartridge is constituted by one corner at the end of the cartridge in the direction of insertion into the disk drive. A slope for guiding the erroneous insertion prevention means to the outside of the cartridge is formed on one shell side of the upper and lower shells, and an erroneous insertion prevention surface which is in contact with the erroneous insertion prevention means is formed on the other shell side. It is formed. Further, the large capacity disk drive of the present invention is provided with an erroneous insertion preventing means for selectively abutting an inclined surface or an erroneous insertion preventing surface of the large capacity disk cartridge.

In the large-capacity disk cartridge of the present invention having the above-described structure, the erroneous insertion preventing means is guided to the outside of the cartridge at one corner at the end of the cartridge in the direction of insertion into the disk drive. When the slope is formed, the slope is formed at one corner side of the upper and lower shells at the corner portion, and the erroneous insertion prevention surface abutted against the erroneous insertion prevention means is formed at the other shell side of the corner portion. Therefore, when attempting to insert this large-capacity disk cartridge directly into a conventional small-capacity disk drive, the erroneous insertion prevention surface of the corner portion must abut against the error prevention means, and the insertion should be prohibited. Can be. Further, the large capacity disk drive of the present invention is provided with the erroneous insertion prevention means of the contact amount selectively contacting the slope or the erroneous insertion prevention surface of the corner portion of the large capacity disk cartridge.
When a large-capacity disk cartridge is directly inserted into this large-capacity disk drive, the slope is brought into contact with the erroneous insertion preventing means, and the erroneous insertion preventing means is allowed to escape to the outside of the cartridge at the slope, and the large-capacity disk cartridge is inserted. On the other hand, when a large-capacity disk cartridge is erroneously inserted into this large-capacity disk drive, the erroneous insertion prevention surface is brought into contact with the erroneous insertion prevention means to prevent erroneous insertion of the large-capacity disk cartridge. Can be banned.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a large-capacity floppy disk cartridge and a large-capacity floppy disk drive to which the present invention is applied will be described below with reference to FIGS. The same components as those in FIGS. 17 to 26 are denoted by the same reference numerals, and the description will not be repeated.

"First Embodiment of Large Capacity Floppy Disk Cartridge" First, FIG. 1, FIG. 3, FIG. 5, FIG.
According to FIGS. 11 and 12, a large capacity floppy disk
A first embodiment of the cartridge L2 will be described.
That is, this large-capacity floppy disk cartridge L2, which is a large-capacity disk cartridge, has a large-capacity floppy disk L1, which is a large-capacity disk-shaped recording medium, rotatably housed in the cartridge 5.
The outer dimensions, shape, and structure of the cartridge 5 and the shutter 8 are the same as those of the small-capacity floppy disk cartridge S2 described above, except for the structure related to erroneous insertion prevention. However, the recording capacity of the large-capacity floppy disk L1 has been increased to a large capacity of 100 MB or more.

Then, this large-capacity floppy disk
Also in the cartridge L2, a structural portion for preventing erroneous insertion is provided at the corner portion 11 between the front end surface 5a and the right side surface 5b of the cartridge 5, but in the first embodiment, only the upper shell 3 of the cartridge 5 is provided. 45 °
A slope 15 which is a so-called C-plane is formed. The lower shell 4 has a slope 1 of the upper shell 3.
5, a triangular overhang 16 extending outward in a triangular shape is left, and the front surface of the overhang 16 has an erroneous insertion prevention surface for erroneous insertion prevention means 40 of a large-capacity floppy disk drive L21 described later. 17. The erroneous insertion preventing surface 17 is
Is formed flush with the front end face 5a which is the end in the direction of insertion into the disk drive. At this time, since the thicknesses of the upper and lower shells 3 and 4 are each configured to be Ｔ T of the total thickness T of the cartridge 5, the thickness of the slope 15 and the erroneous insertion prevention surface 17 are also そ れ ぞ れ T. . Further, by forming the erroneous insertion prevention surface 17 flush with the front end surface 5a, the overhang portion 16 can have sufficient strength, and the strength of the erroneous insertion prevention surface 17 can be secured.

[First Embodiment of Large Capacity Floppy Disk Drive] Next, a first embodiment of a means for preventing erroneous insertion of a large capacity floppy disk drive will be described with reference to FIGS. That is, the large-capacity floppy disk drive L21, which is a large-capacity disk drive, has the same configuration as the small-capacity floppy disk drive S21 shown in FIGS.
Torsion coil spring 4 constituting erroneous insertion prevention means L40
1, the contact amount B of the stopper end 41c of the one end 41b to the large-capacity floppy disk cartridge L2.
Is set to a value (B <１ ／ T) which is less than の of the total thickness T of the cartridge 5 and slightly smaller than １ ／ T which is the thickness of the slope 15 of the upper shell 3.

FIG. 14 shows a small capacity floppy disk drive S21 shown for comparison with the erroneous insertion preventing means L40 of the large capacity floppy disk drive L21.
5 shows the contact amount A of the stopper end 41c of the erroneous insertion prevention means S40 in FIG. 7A. Since the contact amount A is substantially equal to the total thickness T of the cartridge 5, the large-capacity floppy disk The contact amount B of the stopper end 41c of the erroneous insertion prevention means L40 of the drive L21 is
1/2 of the contact amount A of the stopper end 41c of the erroneous insertion prevention means S40 of the small capacity floppy disk drive S21.
Obviously, the following values are set.

Therefore, the large-capacity floppy disk cartridge L2 is
When the cartridge is correctly inserted into the cartridge 21 in the correct direction, the slope 15 of the cartridge 5 of the large-capacity floppy disk cartridge L2 as shown in FIGS. Stopper end 41c of one end 41b of torsion coil spring 41 of erroneous insertion prevention means L40
Is contacted from the direction of the arrow a by the contact amount B. Then, the stopper end 41c is released in the direction of arrow j, which is the right outside of the cartridge 5, by the guiding action of the stopper end 41c by the slope 15, so that the large-capacity floppy disk cartridge L2 is moved to the large-capacity floppy disk drive L21. It can be inserted properly without any trouble.

On the other hand, the large-capacity floppy disk cartridge L2 is
If the cartridge 1 is erroneously inserted in the wrong direction, the left end or the front end 5e of the front end surface 5a of the cartridge 5 is substantially perpendicular to the direction of the arrow a by the contact amount A with the stopper end 41c of the erroneous insertion prevention means L40. In this manner, the erroneous insertion of the large-capacity floppy disk cartridge L2 is prohibited.

By the way, when this large-capacity floppy disk cartridge L2 is to be inserted into the small-capacity floppy disk drive S21 shown in FIG. 22 in the correct direction, the cartridge shown in FIG. 3 (shown by a dotted line) and FIG. As shown in the figure, the erroneous insertion prevention surface 17 of the cartridge 5 is brought into contact with the lower end side of the stopper end 41c of the erroneous insertion prevention means S40 in a direction substantially perpendicular to the arrow a at a value of approximately の of the contact amount A. The normal insertion of the large capacity floppy disk cartridge L2 into the small capacity floppy disk drive S21 is prohibited.

Therefore, the large-capacity floppy disk cartridge L2 is
21 can be prevented from being erroneously inserted. However, large capacity floppy disk drive L2
1, the small-capacity floppy disk cartridge S2 can be inserted directly, and the small-capacity floppy disk cartridge S2 of the small-capacity floppy disk cartridge S2 has higher durability and larger surface roughness than the large-capacity floppy disk L1. Therefore, the small-capacity floppy disk cartridge S2 is replaced with the large-capacity floppy disk drive L21.
, The small-capacity floppy disk S1 is hardly damaged by the pair of upper and lower magnetic heads 56.

In the large-capacity floppy disk drive L21, as shown by a dashed line in FIGS. 19 and 20, a damper 66 is attached to the slide plate 27 to complete the insertion of the large-capacity floppy disk cartridge L2. Accordingly, the slide plate 27 is moved by an arrow b by the slide plate spring 30.
When the cartridge holder 26 slides down from the up position to the down position in parallel with the direction of arrow h, the damper 66 reduces the sliding speed of the slide plate 27 in the direction of arrow b. Of the large-capacity floppy disk L1 by the spindle motor 51.
Is applied for the first time after the rotational drive is started at a predetermined speed, a control means for bringing the pair of upper and lower magnetic heads 56 into contact with the large-capacity floppy disk L1 has a lower durability than the small-capacity floppy disk S1. The large-capacity floppy disk L1 having a small surface roughness is not damaged by the pair of upper and lower magnetic heads 56.

[Second Embodiment of Large-Capacity Floppy Disk Cartridge and Large-Capacity Floppy Disk Drive] Next, referring to FIGS. 2, 4, 7 and 8, a large-capacity floppy disk cartridge L2 and a large-capacity floppy disk A second embodiment of the floppy disk drive L21 will be described. That is, in the second embodiment, the so-called C-plane in which only the lower shell 4 is cut at 45 ° at the corner portion 11 between the front end surface 5a and the right side surface 5b of the cartridge 5 of the large-capacity floppy disk cartridge L2. A slope 15 is formed, and the front surface of a triangular overhang 16 formed on the upper shell 3 is configured as an erroneous insertion prevention surface 17.

Therefore, in the second embodiment, the slope 1
5 and the erroneous insertion prevention surface 17 are arranged upside down in the first embodiment described above, so as shown in FIGS. 4 (indicated by dotted lines), FIGS.
The vertical direction of the stopper end 41c of the erroneous insertion prevention means L40 in the drive L21 is also arranged in the opposite direction.

According to the second embodiment, as in the first embodiment, the large-capacity floppy disk cartridge L2 can be directly inserted into the large-capacity floppy disk drive L21, while the wrong insertion is possible. Insertion can be prevented, and a large capacity floppy disk cartridge L can be inserted into the small capacity floppy disk drive S21.
21 can be prevented from being erroneously inserted.

"Third Embodiment of Large Capacity Floppy Disk Cartridge" Next, FIG. 9 shows a third embodiment of a large capacity floppy disk cartridge L2. Then, cartridge 5
An erroneous insertion preventing surface 17 is formed at a position having a step H with respect to the front end surface 5a of the front end surface 5a.
Therefore, in the third embodiment, the material of the lower shell 4 or the upper shell 3 on which the erroneous insertion preventing surface 17 is formed is reduced by the amount corresponding to the step H, thereby reducing the cost and weight by reducing the material. be able to.

"Fourth Embodiment of Large Capacity Floppy Disk Cartridge" Next, FIG. 10 shows a fourth embodiment of a large capacity floppy disk cartridge L2. Here, the erroneous insertion prevention surface 17 is formed in a concave shape. Therefore, in the fourth embodiment, the large-capacity floppy disk cartridge L2 is connected to the small-capacity floppy disk drive L2.
When mistakenly inserted into 1, as shown by the dotted line in FIG.
Since the concave erroneous insertion prevention surface 17 can be brought into contact with the lower end of the stopper end 41c of the erroneous insertion prevention means S40 from the direction of arrow a, the contact between the concave erroneous insertion prevention surface 17 and the stopper end 41c can be made. Despite the small amount of 1 / 2A,
Since the stopper end 41c can be secured in the concave erroneous insertion prevention surface 17, erroneous insertion of the large-capacity floppy disk cartridge L2 can be reliably prevented.

FIGS. 15 and 16 show modified examples of the erroneous insertion preventing means L40 of the large capacity floppy disk drive L21 and the erroneous insertion preventing means S40 of the small capacity floppy disk drive S21. In this case, a rotating arm 46 formed of synthetic resin, sheet metal, or the like is used.
Is mounted on the top plate 26a of the cartridge holder 26 via a fulcrum shaft 47 so as to be rotatable in the directions of arrows i and j, and this rotating arm 46 is rotated by a tension coil spring or the like mounted between the top and the top plate 26. The stopper arm 46a, which is rotationally urged in the direction of arrow i by a rotating arm spring 48 as an urging means, and bent downward or upward at right angles from the tip of the rotating arm 48, is inserted into the cartridge holder 26.
Is inserted vertically into the opening 43 of the first embodiment. Then, in the erroneous insertion preventing means L40 of the large capacity floppy disk drive L21, the stopper end 4 of the rotating arm 46 is provided.
The contact amount B of the cartridge 6a with respect to the cartridge 5 is set to be equal to or less than 1/2 of the thickness T of the entire cartridge 5, and in the erroneous insertion preventing means L40 of the small capacity floppy disk drive S21, the stopper of the rotating arm 46 is provided. End 4
The contact amount A of the cartridge 6a with the cartridge 5 is substantially equal to the thickness T of the entire cartridge 5. And
The function of preventing the erroneous insertion by the rotary arm 46 is the same as that of the torsion coil spring 41 described above.

However, the erroneous insertion preventing means L40 and S
When the torsion coil spring 41 is used as described above, the large-capacity floppy disk cartridge L2 and the small-capacity floppy disk cartridge S2
When erroneously inserted, the large-capacity floppy disk cartridge L2 and the small-capacity floppy disk cartridge S2 can be easily received with a buffering action by the elastic deformation action peculiar to the torsion coil spring 41. There is an effect that the small and large capacity floppy disk cartridge L2, the small capacity floppy disk cartridge S2 and the cartridge holder 26 can be prevented from being damaged.

On the other hand, these erroneous insertion preventing means L40 and S
In the case where the rotary arm 46 is used, when the large-capacity floppy disk cartridge L2 or the small-capacity floppy disk cartridge S2 is erroneously inserted, the large-capacity floppy disk cartridge L2 or the small-capacity floppy disk cartridge L2 is used by the rotary arm 46. Since the cartridge S2 can be strongly received, there is an effect that the erroneous insertion of the large-capacity floppy disk cartridge L2 or the small-capacity floppy disk cartridge S2 can be prevented beforehand.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical concept of the present invention. For example, the disk-shaped recording medium of the present invention is not limited to a floppy disk, and disk-shaped recording media of various materials and dimensions can be used. The present invention is not limited to cartridges and floppy disk drives, but is applicable to various disk cartridges and disk drives.

[0046]

The large-capacity disk cartridge and large-capacity disk drive of the present invention configured as described above have the following effects.

In the large-capacity disk cartridge according to the first aspect, a slope for guiding the erroneous insertion prevention means to the outside of the cartridge is formed at one corner of the end of the cartridge in the direction of insertion into the disk drive. In the corner portion, the slope is formed on one shell side of the upper and lower shells, and on the other shell side of the corner portion, an erroneous insertion prevention surface which is in contact with the erroneous insertion prevention means is formed. When a large-capacity disk cartridge is to be inserted into a conventional small-capacity disk drive, the wrong insertion prevention surface of the corner portion is brought into contact with the wrong insertion prevention means to prevent the insertion. It is important to note that large-capacity disk cartridges may be accidentally inserted into conventional small-capacity disk drives, causing serious damage to disk-shaped recording media. Can be prevented, it is possible to secure the peace of mind of the user. In addition, when a slope for guiding the erroneous insertion prevention means to the outside of the cartridge is formed at the corner of the cartridge, the slope is formed on one of the upper and lower shells, and the corner on the other shell is left. Thus, an erroneous insertion preventing surface can be formed on the other shell side, so that a large-capacity disk cartridge which is extremely simple in structure, easy to manufacture, and inexpensive can be realized.

In the large-capacity disk cartridge according to the second and third aspects, the thicknesses of the inclined surface and the erroneous insertion preventing surface are each formed within the range of 1/2 or less of the thickness of the cartridge. When molding, these slopes and erroneous insertion prevention surfaces can be formed easily at the same time and within the thicknesses of these upper and lower shells, realizing a low-cost, large-capacity disk cartridge that is easy to manufacture. it can.

In the large capacity disk cartridge according to the fourth aspect, the erroneous insertion prevention surface is formed flush with the end of the cartridge 2 in the direction of insertion into the disk drive. The outer shape of the shell can be simply configured, and sufficient strength can be ensured in the erroneous insertion prevention surface portion.

In the large-capacity disk cartridge according to the fifth aspect, the erroneous insertion prevention surface is formed so as to have a step with respect to the end of the cartridge in the direction of insertion into the disk drive.
The material of the cartridge can be reduced, and the cost and weight can be reduced.

In the large-capacity disk cartridge according to the present invention, since the erroneous insertion prevention surface is formed in a concave shape, erroneous insertion of the large-capacity disk cartridge into the disk drive can be reliably prevented, and reliability is improved. improves.

In the large-capacity disk cartridge according to the present invention, since the disk-shaped recording medium is constituted by a floppy disk, the large-capacity disk cartridge is erroneously inserted into a conventional small-capacity disk cartridge, resulting in low durability. It is possible to prevent a floppy disk having a small surface roughness from being damaged by the magnetic head beforehand, and a large-capacity floppy disk cartridge with high safety and reliability can be realized.

The large-capacity disk cartridge according to the present invention is provided with an erroneous insertion preventing means for selectively contacting a slope or an erroneous insertion preventing surface of a corner portion of the large-capacity disk cartridge. When a large-capacity disk cartridge is directly inserted into a large-capacity disk drive, the slope is brought into contact with the erroneous insertion prevention means, and the erroneous insertion prevention means is escaped to the outside of the cartridge by the slope, so that the large-capacity disk cartridge is correctly inserted. In the event that a large-capacity disk cartridge is erroneously inserted into this large-capacity disk drive, the erroneous insertion-preventing surface is brought into contact with the erroneous insertion prevention means to prevent erroneous insertion of the large-capacity disk cartridge. Only the amount of contact of the erroneous insertion prevention means with the cartridge can be reduced as compared with the conventional case. Without any need to complicate the structure of the preventing means can be realized a low-cost large disk cartridge.

According to the ninth aspect of the present invention, the contact amount of the erroneous insertion preventing means to the cartridge is set to be not more than の of the thickness of the cartridge. The slope is accurately brought into contact with the insertion preventing means, and when a large-capacity disk cartridge is erroneously inserted, the erroneous insertion preventing surface is brought into accurate contact with the erroneous insertion preventing means. And the erroneous insertion prevention surface can be selectively and accurately brought into contact with the erroneous insertion prevention means. Does not occur at all, and the reliability is improved.

According to the tenth aspect of the present invention, the erroneous insertion preventing means is constituted by a torsion coil spring.
When a large-capacity disk cartridge is erroneously inserted, a shock applied to the large-capacity disk cartridge can be buffered, and the large-capacity disk cartridge and the cartridge holder can be prevented from being damaged, so that high safety can be secured.

According to the eleventh aspect of the present invention, since the erroneous insertion preventing means is constituted by the rotating arm, the erroneous insertion of the large capacity disk cartridge can be reliably prevented, and high security can be secured. .

According to the twelfth aspect of the present invention, the large-capacity disk cartridge has a pair of magnetic heads that are in contact with both sides of the floppy disk in the large-capacity disk cartridge.
A large-capacity floppy disk drive suitable for playback can be realized.

[Brief description of the drawings]

FIG. 1 shows a large capacity floppy disk to which the present invention is applied.
FIG. 3 is a plan view and a right side view showing the first embodiment of the cartridge.

FIG. 2 shows a large-capacity floppy disk to which the present invention is applied.
It is the top view and right side view which showed 2nd Embodiment of the cartridge.

3 is an enlarged plan view and a right side view of a slope and an erroneous insertion prevention surface of FIG. 1;

FIG. 4 is an enlarged plan view and a right side view of a slope and an erroneous insertion prevention surface of FIG. 2;

FIG. 5 is a perspective view showing an abutment state of the erroneous insertion preventing means of the large-capacity floppy disk drive with respect to the slope of FIG. 3;

FIG. 6 is a perspective view showing an abutment state of an erroneous insertion preventing means of the small capacity floppy disk drive with respect to the erroneous insertion preventing surface of FIG. 3;

FIG. 7 is a perspective view showing the state of contact of the erroneous insertion preventing means of the large-capacity floppy disk drive with the slope of FIG. 4;

8 is a perspective view showing a contact state of an erroneous insertion preventing means of the small capacity floppy disk drive with respect to the erroneous insertion preventing surface of FIG. 4;

FIG. 9 shows a large capacity floppy disk to which the present invention is applied.
It is the top view and right side view of the principal part which showed 3rd Embodiment of the cartridge.

FIG. 10 is a plan view and a right side view of a main part of a large-capacity floppy disk cartridge according to a fourth embodiment of the present invention.

FIG. 11 is a plan view of a main part showing a means for preventing erroneous insertion of a large capacity floppy disk drive to which the present invention is applied.

FIG. 12 is a sectional side view taken along the line AA of FIG. 11;

FIG. 13 is a perspective view of the erroneous insertion preventing means of FIG. 11;

FIG. 14 is a perspective view for explaining a difference in abutment amount with respect to a cartridge when the erroneous insertion preventing means of FIG. 13 is applied to a conventional small-capacity floppy disk drive.

FIG. 15 is a perspective view showing a modification of the erroneous insertion preventing means of the large-capacity floppy disk drive to which the present invention is applied.

FIG. 16 is a perspective view for explaining a difference in abutting amount with respect to a cartridge when the erroneous insertion preventing means of FIG. 15 is applied to a conventional small capacity floppy disk drive.

FIG. 17 is a partially cutaway plan view of a small capacity floppy disk drive before a small capacity floppy disk is inserted.

18 is a partially cutaway plan view when the small capacity floppy disk cartridge is completely inserted into the small capacity floppy disk drive of FIG. 17;

19 is a partially cutaway plan view showing a state where the cartridge holder of FIG. 17 is removed.

FIG. 20 is a partially cutaway plan view showing a state where the cartridge holder of FIG. 18 is removed.

FIG. 21 is a side view showing an up state of the cartridge holder of FIG. 17;

FIG. 22 is a side view showing the cartridge holder of FIG. 18 in a down state.

FIG. 23 is a plan view illustrating the escape operation of the erroneous insertion preventing means when the small capacity floppy disk cartridge is correctly inserted into the small capacity floppy disk drive.

FIG. 24 is a plan view for explaining an erroneous insertion prohibiting operation of the erroneous insertion preventing means when the small capacity floppy disk cartridge is erroneously inserted into the small capacity floppy disk drive.

FIG. 25 is a sectional side view as seen in the direction of arrows BB in FIG. 23;

FIG. 26 is a plan view and a right side view showing a conventional small-capacity floppy disk cartridge.

[Explanation of symbols]

L1 is a large-capacity floppy disk that is a large-capacity disk-shaped recording medium, L2 is a large-capacity floppy disk cartridge that is a large-capacity disk cartridge, 3 is an upper shell, 4 is a lower shell, 5 is a cartridge, and 5a is a disk drive of a cartridge. The front end face, which is the end in the direction of insertion into the cartridge, 5b is the right side face of the cartridge, 15 is the slope, 17
L21 is a large capacity floppy disk drive which is a large capacity disk drive, 22 is a chassis, 26 is a cartridge holder, 27 is a slide plate,
34 is a holder elevating mechanism, L40 is an erroneous insertion prevention means,
Numeral 1 denotes a torsion coil spring constituting an erroneous insertion preventing means, 41c
Is a stopper end of the torsion coil spring, 46 is a rotating arm as a modification of the erroneous insertion preventing means, 46a is a stopper end of the rotating arm, 51 is a spindle motor, 52 is a disk table, 56 is a magnetic head, 57 is a head moving mechanism,
66 is a damper.

Claims (12)

[Claims] A cartridge which is constituted by upper and lower shells and has a disk-shaped recording medium accommodated therein, and one corner of one end of the cartridge in the direction of insertion into the disk drive, and one of the upper and lower shells An inclined surface formed on the shell side for guiding the erroneous insertion prevention means to the outside of the cartridge, and one corner portion of the end of the cartridge in the direction of insertion into the disk drive, the other of the upper and lower shells being on the other shell side. A large-capacity disk cartridge having an erroneous insertion preventing surface formed and abutting against erroneous insertion preventing means. 2. The method according to claim 1, wherein the slope is 1 / th of the thickness of the cartridge.
2. The large-capacity disk cartridge according to claim 1, wherein said large-capacity disk cartridge is formed within a range of 2 or less. 3. The large-capacity disk cartridge according to claim 1, wherein said erroneous insertion preventing surface is formed in a range of not more than 1/2 of a thickness of said cartridge. 4. The large-capacity disk cartridge according to claim 1, wherein the erroneous insertion prevention surface is formed flush with an end of the cartridge in a direction in which the cartridge is inserted into the disk drive device. 5. The large-capacity disk cartridge according to claim 1, wherein the erroneous insertion prevention surface is formed to have a step with respect to an end of the cartridge in a direction in which the cartridge is inserted into the disk drive device. 6. The large-capacity disk cartridge according to claim 1, wherein said erroneous insertion preventing surface is formed in a concave shape. 7. A disk drive according to claim 1, wherein said disk-shaped recording medium is a floppy disk.
7. The large-capacity disk cartridge according to claim 3, claim 4, claim 4, claim 5, or claim 6. 8. A cartridge holder into which a large-capacity disk cartridge according to claim 1, 2, 3 or 4, 5 or 6, or 7 is inserted. A large-capacity disk drive, comprising: a contact amount erroneous insertion preventing means that is selectively attached to the inclined surface or the erroneous insertion preventing surface of the inserted disk cartridge. 9. The large-capacity disk drive according to claim 8, wherein the amount of contact of the erroneous insertion preventing means with the cartridge is made equal to or less than half the thickness of the cartridge. 10. A large-capacity disk drive according to claim 8, wherein said erroneous insertion preventing means is constituted by a torsion coil spring. 11. The large-capacity disk drive according to claim 8, wherein said erroneous insertion preventing means is constituted by a rotating arm. 12. The large-capacity disk drive according to claim 8, further comprising a pair of magnetic heads contacting both sides of the floppy disk in the large-capacity disk cartridge.