JPH09171670A - Magnetic disk cartridge and magnetic disk driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent misloading so as not to come in contact with a magnetic head when the magnetic disk cartridge is loaded into a small capacity type disk driving device. SOLUTION: This cartridge is constituted by housing a discoid large capacity magnetic disk medium 12 rotatably in a case 10. In this case, a part of an edge cornet part on the inserting forward side of the case 10 is provided with a tapered part 15 for preventing erroneously directional insertion, used in common with a small capacity magnetic disk cartridge, and also the case side edge corner part formed with the tapered part 15 is provided with a restraining part 16 showing a rectangular corner part to look at in a plane view and capable of restraining a misinserting preventing member 55 in the driving device for the small capacity magnetic disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk cartridge in which a large-capacity magnetic disk medium is housed in a case, and the magnetic disk medium is rotated at a high speed to be used for magnetic recording and reproduction, and more particularly, to a detailed description. Relates to a magnetic disk cartridge which is prevented from being erroneously loaded into a recording / reproducing apparatus for other small capacity type magnetic disk cartridges, and a magnetic disk drive apparatus in which this large capacity type magnetic disk cartridge can be properly loaded. Is.

[0002]

2. Description of the Related Art Conventionally, a magnetic disk is formed on both sides of a disk-shaped base made of a flexible polyester sheet or the like, and magnetic recording is performed on the magnetic layer by a magnetic head while being rotated at a high speed (so-called magnetic disk). Floppy disk) is provided, and its ease of handling,
It is mainly used as a recording medium for computers because of its low cost.

Recently, this type of magnetic disk is rotatably housed in a small hard case and is used as a magnetic disk cartridge, as represented by a so-called 3.5-inch type magnetic disk. Is increasing.

In a magnetic disk cartridge of the type using this hard case, an opening for inserting a magnetic head is provided in the case, but this opening is always closed by a shutter biased in one direction except when in use, From there, consideration is given to prevent foreign matter such as dust from entering the case.

By the way, such a magnetic disk cartridge is always required to have a large capacity.
5-inch type with a storage capacity of 1 MB (megabyte) or 2
MBs have already been put into practical use and now have a storage capacity of 100M
B and more are also being offered.

[0006]

As described above, when a magnetic disk cartridge having a recording capacity higher than that of a conventional product is provided, a disk drive for driving the large-capacity type magnetic disk cartridge is newly provided. May be provided. This new disk drive device can drive a new large-capacity type magnetic disk cartridge, and in many cases, for the convenience of the user, a so-called "lower compatibility" function, that is, a lower capacity in terms of recording capacity. Such a conventional magnetic disk cartridge is often formed to have a function of driving.

In order to realize this backward-compatible function, the new large-capacity type magnetic disk cartridge is formed such that the outer shape of the case and the like are substantially the same as those of the conventional small-capacity type magnetic disk cartridge. For this reason, there is a risk that a new large-capacity magnetic disk cartridge that looks similar to a conventional small-capacity magnetic disk cartridge may be erroneously loaded into a disk drive for a small-capacity magnetic disk cartridge.

Conventional disk drive devices for small-capacity magnetic disk cartridges often cannot drive the new large-capacity magnetic disk cartridges because they often do not have sufficient protection function. When a large-capacity type magnetic disk cartridge is erroneously loaded in the disk drive and the disk drive is activated, the information recorded in the magnetic disk cartridge may be destroyed.

In the above situation, the occurrence of erroneous recording / erase can be prevented by providing a capacity discriminating hole or the like. However, a large-capacity magnetic disk cartridge loaded into a small-capacity type magnetic disk drive is There is a possibility that the lower magnetic head comes into contact with the magnetic disk medium by inserting the shutter member into the proper loading position and opening the shutter member. At the time of this contact, foreign matter, dust, and the like adhering near the magnetic head may adhere to the large-capacity magnetic disk medium.

[0010] In this large-capacity magnetic disk, the increase in capacity can be obtained by increasing the density. As a result, the recording wavelength is shortened and the recording track width is narrowed. If there is, there is a possibility that a read error of recorded data occurs.

Therefore, the present invention is to provide a magnetic disk cartridge which is prevented from being loaded into a disk drive device for a lower magnetic disk cartridge in terms of capacity.

Further, another object of the present invention is to provide a magnetic disk drive device in which the above-mentioned large-capacity type magnetic disk cartridge can be properly loaded.

[0013]

A magnetic disk cartridge according to the present invention, which has solved the above-mentioned problems, accommodates a disk-shaped large-capacity magnetic disk medium rotatably in a case, and has an opening for inserting a magnetic head in the case. , A shutter member for opening and closing this opening is provided, and a taper portion for preventing wrong direction insertion common to the small-capacity magnetic disk cartridge is provided at a part of a side edge corner in front of the insertion of the case, It is characterized in that the case side edge corner portion formed with the tapered portion is provided with a locking portion having a rectangular corner portion when seen in a plan view.

When the magnetic disk cartridge as described above is to be inserted into a driving device for a small capacity magnetic disk cartridge, a corner portion in front of the insertion has a taper portion, but a locking portion is formed. By presenting a rectangular corner in plan view, the erroneous insertion prevention member of the small-capacity magnetic disk drive device is abutted and locked at the tip portion of this locking portion, and further insertion is prevented. The erroneous loading prevention function works without opening the shutter member.

Further, if the case has a structure in which the concave portion for inserting the shutter member release lever at the front edge portion is not formed, the magnetic disk drive device for the small capacity type is erroneously inserted to engage with the engaging portion. It is possible to prevent erroneous loading in a drive device that does not have a prevention member and that prevents insertion in the wrong direction as the opening pin that opens the shutter member engages with the recess. is there.

The magnetic disk drive of the present invention is
It is provided with an erroneous insertion prevention member that allows the insertion of the cartridge by not contacting the locking portion formed at the side edge corner of the front side of the insertion of the magnetic disk cartridge but contacting only the taper portion to be displaced. It is what

When the magnetic disk cartridge having the large-capacity type locking portion is inserted into the magnetic disk drive device, the erroneous insertion preventing member contacts only the taper portion without locking the locking portion. The cartridge is moved to allow insertion, and the cartridge is inserted further and loaded in a regular position.

[0018]

According to the present invention as described above, a taper portion is provided at a part of a side edge corner portion in front of insertion of a case for rotatably accommodating a large capacity magnetic disk medium.
By providing a locking portion having a rectangular corner when viewed in plan at the corner of the case side edge where the tapered portion is present, when it is mounted in the small capacity magnetic disk drive device, The erroneous insertion preventing member can be locked to the locking portion to prevent further insertion, erroneous loading can be prevented without opening the shutter member in the drive device, and recording data can be prevented from being damaged. In addition, contact with the magnetic head can be avoided, foreign matter such as dust can be prevented from adhering, the occurrence of read errors, etc. can be suppressed, and the taper portion is formed, so that in a large-capacity magnetic disk drive device, front and back or front and back It is possible to prevent the wrong insertion.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a plan view of an example of a large-capacity type magnetic disk cartridge, and also shows a part of a small-capacity type magnetic disk drive. FIG. 2 is a perspective view showing the inserting operation.

The magnetic disk cartridge 1 is housed in a case 10 (hard case) made of synthetic resin, for example.
The center core 11 is rotatably held, and the center core 11 has a magnetic disk medium 12 having a central circular hole.
Is affixed. The magnetic disk medium 12 is a disk-shaped base made of a flexible polyester sheet or the like having magnetic layers formed on both sides thereof.

The case 10 is formed by fixing two shell halves in a lid-matching manner, and a magnetic head insertion opening 10a is provided on the front surface and the back surface of the case 10. Further, a shutter member 13 which is slidable in the left-right direction in the drawing is attached to the case 10 in order to open and close the magnetic head insertion opening 10a. The shutter member 13 is formed of, for example, a stainless steel plate or an aluminum plate, or a plastic such as polyacetal resin in a substantially U-shaped cross section, and has a front surface (upper surface) and a back surface in the insertion direction of the case 10. It is attached so as to cover the (lower surface) from the outside. An opening 13a is provided on each of the front surface and the back surface of the shutter member 13, and the opening for inserting the magnetic head of the case 10 is formed.
Open and close 10a.

The shutter member 13 is biased by a torsion spring (not shown) and normally maintains a closed state (state shown). The opening 13a of the shutter member 13 is provided at a position away from each magnetic head insertion opening 10a when the shutter member 13 is in this closed state. Therefore, each magnetic head insertion opening 10a is normally closed by the shutter member 13, and foreign matter such as dust can be removed from the case through the shutter member 13.
Intrusion into the inside of 10 is prevented.

Further, a taper portion, which is common to a small-capacity magnetic disk cartridge 2 (see FIG. 4) described later, for preventing wrong direction insertion is provided at a part of a side edge corner portion of the case 10 in front of insertion (insertion direction C). 15 are provided. This taper part 15
Has a tapered surface with its corners obliquely removed.

Further, a flat plate-like engaging portion 16 is provided on the back surface side at the side edge corner portion of the case 10 where the taper portion 15 is present. This locking portion 16 presents a rectangular corner when viewed two-dimensionally, in other words, the corner is tapered on the front surface while leaving the locking portion 16 having a predetermined thickness on the back surface side. Is formed.

The large-capacity magnetic disk cartridge 1 of the present example having the above-mentioned configuration is a so-called 3.5-inch type, but more than the known 3.5-inch type small-capacity magnetic disk cartridge 2. It has a remarkably large recording capacity of 128 MB, for example.

FIG. 4 shows a conventionally known 3.5-inch type magnetic disk cartridge 2 having a recording capacity of 1 MB as viewed from the front side. In FIG. 4, elements that are the same as those shown in FIG. 1 are given the same numbers, and duplicated description thereof will be omitted.

As is clear from comparison between FIG. 4 and FIG. 1, the large-capacity type magnetic disk cartridge 1 is compared with the small-capacity type magnetic disk cartridge 2.
The outer shapes are almost the same, but they differ in the presence or absence of the locking portion 16. That is, in the small-capacity type magnetic disk cartridge 2, the taper portion 15 at the corner of the insertion destination is formed in a slanted surface by removing the case 10 from the front surface to the back surface.

The engaging portion 16 of the large-capacity magnetic disk cartridge 1 as described above can be engaged with the erroneous insertion preventing member 55 of the small-capacity magnetic disk driving device 50 as shown in FIG. Is. This incorrect insertion prevention member
Reference numeral 55 denotes a bucket that serves as a guide when the magnetic disk cartridge 1 is inserted in the magnetic disk drive device 50.
It is composed of a linear spring arranged at the side edge portion of 51. The erroneous insertion prevention member 55 is fixed at the base end side (not shown) and is biased so that the tip end portion 55a is elastically deformed inward (direction A), and the tip end portion 55a is bent downward as shown in FIG. It is inserted and locked in the groove portion 51a of the bucket 51. The tip portion 55a comes into contact with the end portion of the groove portion 51a of the bucket 51 and stops, and at the stop position, the tip portion 55a has entered the cartridge insertion space of the bucket 51. This entry position is set within the formation range of the tapered portion 15.

When the large capacity type magnetic disk cartridge 1 is inserted, the erroneous insertion preventing member 55 is
The tip portion 55a comes into contact with the engaging portion 16 at the corner of the case 10 to prevent the magnetic disk cartridge 1 from being inserted.

On the other hand, when the small-capacity type magnetic disk cartridge 2 is inserted into the small-capacity magnetic disk drive device 50, the erroneous insertion preventing member 55 has a tip portion 55a.
Is abutted against the taper portion 15 at the corner of the insertion tip of the cartridge 2 to be displaced outward (direction B) along the inclined surface thereof to permit the insertion of the magnetic disk cartridge 2. On the other hand, when the magnetic disk cartridge 2 is inserted upside down or backwards or forwards, that is, when the magnetic disk cartridge 2 is inserted in the wrong direction, the flat corner portion where the taper portion 15 is not formed causes the tip of the incorrect insertion prevention member 55. The erroneous insertion preventing member 55, which comes into contact with the portion 55a, prevents the magnetic disk cartridge 2 from being inserted without being displaced outward, and is configured to prevent erroneous insertion.

Further, a large capacity type magnetic disk cartridge 1 and a small capacity type magnetic disk cartridge 2
In comparison with the small capacity type magnetic disk cartridge 2 of FIG. 4, a recess 18 for inserting an opening lever for opening and closing the shutter member 13 at the front edge of the case 10 is formed. The recess 18 is not formed in the magnetic disk cartridge 1 of the type. The recess 18
Corresponds to another method in which movement of the bucket 51 and movement of the magnetic head are regulated in response to insertion of a shutter opening / closing pin (not shown) to prevent improper insertion.

When the magnetic disk cartridge 1 is inserted into the shutter opening / closing pin type magnetic disk drive, the recess 18 into which the shutter opening / closing pin is inserted and engaged.
Since the bucket 51 and the magnetic head cannot be moved, the erroneous loading can be prevented.

The large-capacity type magnetic disk cartridge 1 as described above is driven by a disk drive device (not shown) having a so-called "backward compatibility" function. This disk drive device is an erroneous insertion prevention member in the small-capacity magnetic disk drive device 50 as described above.
Although it has an erroneous insertion preventing member 21 corresponding to 55 for preventing erroneous insertion as illustrated in FIG. 3, its form is different, and the large capacity type magnetic disk cartridge 1 is provided.
The locking portion 16 is provided with a structure that cannot be locked.

As a form thereof, the basic structure is composed of a linear spring like the erroneous insertion preventing member 55 in the small-capacity type disk drive device 50, and the base end side (not shown) is fixed and the tip end 21a is fixed. It is bent downward. The length of the tip portion 21a is set so that it does not abut the locking portion 16 of the large capacity magnetic disk cartridge 1 but only the taper portion 15. That is, the lower end position of the tip portion 21a of the erroneous insertion prevention member 55 is the locking portion.
It is set to be located above the upper surface position of 16.

When the magnetic disk cartridge 1 is pushed in the C direction with respect to the large-capacity type magnetic disk drive device having the above-mentioned erroneous insertion preventing member 21, only the taper portion 15 is erroneously inserted. Abut the tip 21a,
The erroneous insertion prevention member 21 is laterally displaced by the taper surface of the taper portion 15 to allow the insertion of the cartridge 1 and also to prevent the insertion of the cartridge in the front and back or in the front and back in different directions. Has a direction insertion prevention function.

When the magnetic disk cartridge 1 is finally pushed to a predetermined loading position, the shutter member 13 is moved to an open position where its opening 13a is aligned with the magnetic head insertion opening 10a of the case 10 and the disk drive device is opened. A magnetic head (not shown) can pass through the openings 13a and 10a to come into contact with the magnetic disk medium 12, and information can be recorded or reproduced.

When the small-capacity magnetic disk cartridge 2 shown in FIG. 4 is loaded into the above-mentioned disk drive device, it can be loaded in a normal position without any problem, and writing and reading can be performed by the magnetic head. .

As described above, when the large-capacity magnetic disk cartridge 1 is to be loaded into the small-capacity type disk drive device of FIG. 1, the magnetic disk cartridge 1 is moved in the direction of arrow C as described above. When pushed in, the incorrect insertion prevention member 55 is locked by the locking portion 16 to prevent further insertion, and the magnetic disk cartridge 1 is taken out as it is without opening the shutter member 13.

[Brief description of the drawings]

FIG. 1 is a plan view showing a magnetic disk cartridge according to one embodiment of the present invention.

FIG. 2 is a perspective view showing an inserted state of the magnetic disk cartridge.

FIG. 3 is a perspective view of an essential part showing a configuration example of an erroneous insertion prevention member of a disk drive device having a backward compatibility function.

FIG. 4 is a plan view showing a small capacity magnetic disk cartridge.

[Explanation of symbols]

 1 Large-capacity magnetic disk cartridge 2 Small-capacity magnetic disk cartridge 10 Case 10a Magnetic head insertion opening 12 Magnetic disk media 13 Shutter member 15 Tapered part 16 Locking part 18 Recessed part 21 Wrong insertion prevention member 55 Wrong insertion prevention member

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[Procedure amendment]

[Submission date] January 25, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

Conventional disk drives for small-capacity magnetic disk cartridges often do not provide sufficient protection for new large-capacity magnetic disk cartridges. If the disk drive device operates when a disk cartridge is erroneously loaded, information recorded on the magnetic disk cartridge may be destroyed.

Claims (3)

[Claims] 1. A magnetic disk cartridge in which a disk-shaped large-capacity magnetic disk medium is rotatably housed in a case, and a magnetic head insertion opening and a shutter member for opening and closing the opening are provided in the case. In a part of the side edge corner of the insertion front side of the case, a taper portion for preventing wrong direction insertion common to the small capacity magnetic disk cartridge is provided, and a case side edge corner portion in which the taper portion is formed, A magnetic disk cartridge characterized in that a locking portion having a rectangular corner when viewed in plan is provided. 2. The magnetic disk cartridge according to claim 1, wherein the case does not have a recess at the front edge for inserting the shutter member release lever. 3. A magnetic disk drive device in which the magnetic disk cartridge according to claim 1 can be properly loaded, wherein the magnetic disk cartridge is in contact with a locking portion formed at a side edge corner portion in front of the insertion of the magnetic disk cartridge. A magnetic disk drive comprising: an erroneous insertion preventing member that does not contact but is displaced only by contacting the taper portion to permit insertion of the cartridge.