JPH11120733A - Disk cartridge and disk drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the necessity of providing a detection hole in a cartridge like a conventional disk cartridge by detecting the magnetism of a magnet provided in the cartridge so as to identify the class or the like of a disk record medium. SOLUTION: A disk cartridge 1 for housing a disk record medium 2 in a cartridge 3 to be freely rotated includes a class identification magnet 5 provided for identifying the class of the disk record medium 2. For a disk drive device 101 for performing recording and/or reproducing of the disk cartridge 1, a magnetic sensor 106 is provided for detecting the variety identification magnet 5 provided in the disk cartridge 1. Then, the magnetism of the class identification magnet 5 is detected by the magnetic sensor 106 of the drive device 101, and the class of the disk cartridge 1 is identified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge such as an optical disk or a magneto-optical disk and a disk drive device for recording and / or reproducing data on and from the disk cartridge. The disc cartridge type such as the recording capacity of the disc cartridge can be easily and reliably identified with a simple structure.

[0002]

2. Description of the Related Art A disk cartridge in which a disk-shaped recording medium such as a magnetic disk, an optical disk, or a magneto-optical disk is rotatably housed in a cartridge is widely used as a so-called multimedia recording medium for images and sounds. .

[0003] With the development of multimedia,
There is a demand for a higher capacity of the above-mentioned disc cartridge, and in order to meet this demand, a so-called high-capacity disc cartridge having a recording capacity larger than that of a conventional (existing) disc cartridge is supplied to the market.

The above-mentioned high-capacity disk cartridge has an increased recording capacity by enlarging the size of a disk-shaped recording medium, and has a higher recording capacity by changing the recording density or the like without changing the size of the disk-shaped recording medium. Some have increased capacity.

When the size of the disk-shaped recording medium is increased, not only does the size of the cartridge accommodating the disk-shaped recording medium need to be increased, but also the size of the disk drive must be changed.
An apparatus in which the recording capacity is increased by changing the recording density or the like without changing the size of the disk-shaped recording medium has an advantage that an existing cartridge can be used.

However, when the recording density or the like is changed, there is a difference in the method of recording and reproduction by the disk drive device, and it is necessary to identify the difference.

Therefore, conventionally, an identification hole is formed in a cartridge as means for identifying a recording capacity or the like, while an identification hole detection pin is provided in a disk drive device, and when a disk cartridge is loaded into the disk drive device,
A method is employed in which the presence / absence, depth, and the like of the identification hole of the disk cartridge are detected by the identification hole detection pin of the disk drive device.

[0008]

By the way, an identification hole is provided in the conventional cartridge, and an identification hole detection pin is provided in the disk drive device, and the depth of the identification hole and the like are detected by the detection pin, and the disc is discriminated. The method for identifying the recording capacity and the like of the cartridge has the following problems.

(1) In general, the cartridge is formed in a minimum size necessary for a disk-shaped recording medium to be housed in order to achieve compactness or the like.
The locations where the identification holes are formed are limited, and it is difficult to provide a plurality of identification holes. (The identification hole cannot be provided in the disk storage portion or the shutter slide area of the cartridge).

(2) When the detection pin enters the identification hole,
The detection pin damages the bottom surface of the cartridge and the periphery of the identification hole.

The present invention has been made to solve the above-mentioned conventional problems.

[0012]

According to the present invention, a disc cartridge in which a disc-shaped recording medium is rotatably accommodated in a cartridge is provided with a type identifying magnet for discriminating the type of the disc-shaped recording medium. In addition, the disk drive device that performs recording and / or reproduction of the disk cartridge is provided with a magnetic sensor that detects a type identification magnet provided on the disk cartridge. The type of disk cartridge can be identified by detecting the magnetism of the magnet.

[0013]

FIG. 1 is a perspective view of a disk cartridge 1, a disk drive device 101, and a conventional disk cartridge 201 according to a first embodiment, and FIG. 2 is a perspective view of the disk cartridge 1 with the disk cartridge 1 turned upside down. is there.

The disk cartridge 1 includes a magneto-optical disk 2 as a disk-shaped recording medium, a cartridge 3 for rotatably storing the magneto-optical disk 2, and a shutter 4 slidably mounted on the cartridge 3.
A magnet 5 for type identification for identifying the type of the recording capacity of the magneto-optical disk 2 or the like is attached to the lower surface side of the cartridge 3.

The disk drive device 101 includes a cartridge holder 102 for inserting and holding the disk cartridge 1, a spindle 103 for rotating the magneto-optical disk 2 of the disk cartridge 1 inserted and held in the cartridge holder 102, Spindle 1
The pickup 104 reads (reproduces) a signal recorded on the signal recording layer of the magneto-optical disc 2 rotated by the optical disc 03, and records the signal when recording the signal on the signal recording layer of the magneto-optical disc 2. A bias coil 105 for applying an external magnetic field to the layer and a magnetic sensor 106 for detecting the presence or absence of the type identification magnet 5 of the disk cartridge 1 chucked on the spindle 103 are provided.

Next, the disk cartridge 1 will be described with reference to FIG.
This will be described in detail with reference to FIG.

FIG. 3 is a perspective view showing a state where the disk cartridge 1 is turned upside down and disassembled. The magneto-optical disk 2
Comprises a disk-shaped magneto-optical disk main body 21 and a metal chucking hub 22 attached to the center of the magneto-optical disk main body 21.

The cartridge 3 comprises an upper half 31 and a lower half 32 made of synthetic resin (in FIG. 3,
(The lower half is the upper half and the upper half is the lower half because the disk cartridge is disassembled with its inside upside down.)

The upper half 31 has an annular rib 31a for accommodating a hub at a central portion on the inner surface side, an annular rib 31b for accommodating a disk at a peripheral portion, and the hub 31 for accommodating the hub. An opening 31c for recording / reproducing extends to the front end side of the upper half 31 in a state of being arranged on the annular rib 31a.

The upper half 31 has a concave portion 3 which forms a shutter slide area on the outer surface (lower surface in FIG. 3).
1d and a concave portion 31e for attaching a label.

The lower half 32 has a recording / reproducing opening 32a serving also as a driving opening at a position facing the annular rib 31a for housing the hub of the upper half 31 and the recording / reproducing opening 31c. have.

The lower half 32 has an annular rib 32b for accommodating a disk on the inner peripheral side, like the upper half 31, and forms a shutter slide area on the outer side. It has a concave portion 32d and a concave portion 32e for sticking a label.

After the magneto-optical disk 2 is placed on the inner surface of the upper half 31, the lower half 32 is overlaid on the upper half 31, and the four corners of the upper and lower halves 31, 32 are placed. To the first to fourth four screws 33 to
A flat box-shaped cartridge 3 is formed by coupling at 36.

The shutter 4 includes the upper and lower halves 3
Concave portions 3 forming 1, 32 shutter slide areas
A pair of upper and lower shutter plates (opening / closing portions) 4a and 4b to be superimposed on 1d and 32d, and a connecting portion 4c connecting one end of the shutter plates 4a and 4b are formed in a U-shape. ing. Then, the leg portions 43a, 43b of the slide member 43 attached to the inner surface of the connecting portion 4c with a pair of screws 41, 42 are moved up and down, and the lower halves 31, 32.
The shutter 4 is slidably mounted on the front end side of the cartridge 3 by inserting the slide member 43 between the upper and lower halves 31, 32 by inserting the slide member 43 into the slide guide grooves 31f, 31g and the like provided in the cartridge 3. Have been.

One shutter plate 4a of the shutter 4 has an opening 31 for recording and reproduction provided in the upper half 31.
The shutter plate 4b is formed to have a length capable of opening and closing the shutter c. The other shutter plate 4b has a recording / reproducing opening 32 serving also as a driving opening provided in the lower half 31.
The shutter plate portion 4a is formed longer than the one shutter plate portion 4a so that it can be opened and closed. The tip of the shutter plate portion 4b formed longer is the lower half 32.
Is held down by the shutter guide plate 44 attached to the
The leading end is prevented from rising from the surface of the lower half 31 in a so-called warped state.

The shutter 4 includes a torsion coil spring 45
And the recesses 31d, 32d forming the shutter slide areas of the upper and lower halves 31, 32, respectively.
Of the upper half 31 is closed by the one shutter plate portion 4a, and the drive opening portion of the lower half 32 is closed by the other shutter plate portion 4b. The recording / reproducing opening 32a, which also serves as a recording / reproducing device, is closed. Then, by sliding the shutter 4 against the spring force of the torsion coil spring 45, the openings 31c and 32a are opened.

The type identifying magnet 5 for identifying the recording capacity of the magneto-optical disk 2 is provided at one end (upper, lower halves 31, 3) of the concave portion 32e for attaching a label to the lower half 32.
(The end on the side of the fourth screw 36 for joining the two screws 2).

The magnet 5 is formed in a disk shape by, for example, baking and hardening magnetic powder. As shown in FIG. It is mounted in a state fitted in the recess 32f for use. As shown in FIG. 5, the surface of the magnet 5 may be covered with a protective sheet 37 so that the magnet 5 can be reliably prevented from dropping out of the magnet mounting recess 32f. Further, as shown in FIG. 6, when the protective sheet 37 is thick, the recess 3 for attaching the magnet is used.
By providing a continuous sheet mounting recess 32h at the upper end of 2f and mounting the protection sheet 37 in the recess 32h, the protection sheet 37 can be prevented from protruding from the surface of the lower half 32. The magnet 5
May be configured such that a sheet-shaped member is attached to the surface of the concave portion 32e for attaching the label with a double-sided adhesive tape or the like.

FIG. 7 is an exploded perspective view of the disk drive device 101. The disk drive device 101 includes:
It comprises a loading assembly 111 and a base assembly 112 which supports the loading assembly 111.

The loading assembly 111 has slots 114... 114 provided on both sides of a frame 113 and pins 1 provided on both sides of the cartridge holder 102.
15... 115, the frame 11
3 is formed by mounting the cartridge holder 102 so as to be able to move up and down, and a holder operation plate (not shown) is slid to raise and lower the pins 115... 115 on an inclined surface provided on the holder operation plate. Thus, the cartridge holder 102 is moved up and down with respect to the frame 113.

A shutter opening arm 116 is provided at an end of the cartridge holder 102 on the side of the cartridge insertion port.
Are mounted rotatably, and the bias coil 105 is mounted at the center.

The cartridge holder 102
When the disc cartridge 1 is inserted into the cartridge 3, the shutter release pin 117 provided at the tip of the shutter release arm 116 contacts one end of the leg 43a of the slide member 43 that slidably attaches the shutter 4 to the cartridge 3. Then, the slide member 43 and the shutter 4 are slid against the spring force of the torsion coil spring 45 so that the openings 31 c,
32a is released. When the openings 31c and 32a are opened and the disc cartridge 1 is completely inserted into the cartridge holder 102, the holder operation plate slides to lower the cartridge holder 102 toward the base assembly 112. Thus, the hub 22 of the magneto-optical disk 2 is chucked to the spindle 103.

The base assembly 111 is mounted on the chassis 1
It is configured by assembling a spindle 103 and a pick-up 104 with the spindle 21.

The pickup 104 includes an optical system fixed section 131, an optical system movable section 132, and an optical system movable section 132.
(Voice Coil Motor) 1 that moves the disk in the radial direction of the magneto-optical disk 2 on the lower surface side of the magneto-optical disk 2 chucked by the spindle 103
33.

Then, the light beam B emitted from the semiconductor laser of the optical system fixing section 131 is passed through the objective lens 134 of the optical system movable section 132 to the spindle 1.
Reproduction is performed by applying a signal to the signal recording layer of the magneto-optical disk 2 chucked at 03 and reading a signal reflected from the signal recording layer. Also,
To record a signal on the signal recording layer, the output of the light beam from the semiconductor laser is increased and the
This is performed by raising the temperature of the signal recording layer above the Curie temperature and losing the magnetism of the signal recording layer, and then re-magnetizing by the bias coil 105.

A base plate 135 is attached to the chassis 121 so as to surround the spindle 103. The base plate 135 is provided with first and second disk cartridge positioning pins 136 and 137, and a magnet for identifying the type of the disk cartridge 1 is provided near the second disk cartridge positioning pin 137. 5 is provided.

As shown in FIG. 8, the magnetic sensor 1
Reference numeral 06 denotes a switch having a fixed contact 106a and a movable contact 106b. When the magnet 5 approaches, the movable contact 106b is attracted by the magnetic force of the magnet 5 and comes into contact with the fixed contact 106a. A switch as a magnetic sensor is turned on.

The disk cartridge 1 and the disk drive device 101 according to the first embodiment have the above-described configurations. Therefore, when the disk cartridge 1 is inserted into the cartridge holder 102 of the disk drive device 101, the shutter 4 of the disk cartridge 1 is opened by the shutter opening arm 116 provided on the cartridge holder 102, and then the state shown in FIG. As described above, the disc cartridge 1 is lowered together with the cartridge holder 102, the magneto-optical disc 2 is chucked by the spindle 103, and the type identification disc provided in the label attaching area of the lower half 32 of the cartridge 3 is provided. The magnet 5 faces the magnetic sensor 106 of the disk drive device, and the magnetic sensor 106
Is turned on, the disk cartridge 1 detects that the disk cartridge 1 is a high-capacity disk cartridge to which the type identification magnet 5 is attached. On the other hand, as shown in FIG. 10, when a conventional low-capacity disk cartridge 201 having no type identification magnet 5 is loaded in the disk drive device 101, the low-capacity disk cartridge 201 has the magnet. 5 is not provided, the magnetic sensor 106 is kept off.

FIGS. 11 to 12 show a second embodiment. In this embodiment, the first and second two magnetic sensors 106 and 10 are provided in the disk drive device 101.
7 shows a case where three or more types of disk cartridges of, for example, low capacity, medium capacity, and high capacity can be identified by providing them.

The high-capacity disk cartridge 1 shown at the top of FIG. 11 is provided with a type identification magnet 5 at a position facing the first magnetic sensor 106 of the disk drive 101.

In the middle-capacity disk cartridge 1 shown in the middle, a magnet 5 for type identification is mounted at a position facing the second magnetic sensor 107 of the disk drive device 101.

The conventional low-capacity disk cartridge 201 shown at the bottom is not provided with the type identifying magnet 5.

Accordingly, if the high-capacity disk cartridge 1 is loaded into the disk drive 101,
As shown in FIG. 2A, the magnet 5 for type identification faces the first magnetic sensor 106 and
06 is turned on to detect that the loaded disk cartridge 1 is a high capacity disk cartridge.

If the medium-capacity disk cartridge 1 is loaded into the disk drive device 101,
As shown in (B), the type identification magnet 5 is the second type.
Opposing the magnetic sensor 107, the magnetic sensor 10
7 is turned on to detect that the loaded disk cartridge 1 is a medium capacity disk cartridge 1.

When the conventional low-capacity disk cartridge 201 is loaded in the disk drive device 101, the disk cartridge 201 is provided with the type identification magnet 5 as shown in FIG. Therefore, the first and second magnetic sensors 106 and 107 are kept off, and the loaded disk cartridge 2
01 is detected as a conventional low capacity disk cartridge.

FIG. 13 shows a third embodiment. This embodiment shows a case in which one magnetic sensor 106 is provided in the drive device 101 so that three or more types of disk cartridges such as high capacity, medium capacity, and low capacity can be identified.

As the magnetic sensor 106, a magnetoresistive element or the like for detecting the magnetic force is used.

At the position of the high-capacity disk cartridge 1 shown at the top of FIG. 13 facing the magnetic sensor 106 of the drive device 101, a type identification magnet 5 is mounted.

At the position of the medium-capacity disk cartridge 1 shown in the middle section facing the magnetic sensor 106 of the drive unit 101, the high-capacity disk cartridge 1
A magnet 5 having a weaker magnetic force than the magnet 5 for identifying the type is attached.

The conventional low-capacity disk cartridge 201 shown at the bottom is not provided with the type identifying magnet 5.

Therefore, if the high-capacity disk cartridge 1 is loaded into the drive device 101, the disk cartridge 1 shown in FIG.
As shown in FIG. 5, the type identification magnet 5 faces the magnetic sensor 106, and the magnetic sensor 106 senses the magnetic force of the magnet 5 so that the loaded disk cartridge 1 has a high capacity disk. It detects that it is a cartridge.

When the medium-capacity disk cartridge 1 is loaded into the drive device 101, the type identification magnet 5 faces the magnetic sensor 106 as shown in FIG. The magnetic sensor 106 is a magnet 5 for identifying the type of the high-capacity disk cartridge 1.
By detecting a weaker magnetic force, it is detected that the loaded disk cartridge 1 is a medium capacity disk cartridge.

If the conventional low-capacity disk cartridge 201 is loaded into the drive device 101,
4 (C), the disk cartridge 2
Since the type identification magnet 5 is not attached to 01, the magnetic sensor 106 does not sense the magnetic force, and detects that the loaded disk cartridge is the existing low-capacity disk cartridge 201.

As shown in FIG. 15, the high-capacity disk cartridge 1 is provided with the type identification magnet 5 on the lower half 32 side, instead of giving the magnetic force of the type identification magnet 5 itself. On the other hand, as shown in FIG.
When the high-capacity disk cartridge and the medium-capacity disk cartridge are loaded into the drive device 101, the type-identifying magnet 5 and the drive device of the high-capacity disk cartridge 1 are mounted on the drive device 101. The distance D ₂ between the magnet 5 for identifying the type of the medium-capacity disk cartridge 1 and the magnetic sensor 106 of the drive device 101 is larger than the distance D ₁ between the magnetic sensor 106 and the magnetic sensor 106 of the drive device 101.
May be made large so that the magnetic force of the magnet 5 acting on the magnetic sensor 106 has a difference.

Also, as shown in FIG.
A cylindrical magnet mounting portion 51 is erected between an annular rib 32b for disk storage on the inner surface of the disk 2 and an outer peripheral wall 32i, and a magnet 5 for type identification is fitted into the magnet mounting portion 51,
The magnet 5 may be attached to the cartridge 3 by pressing the upper surface of the magnet 5 with a cylindrical magnet pressing protrusion 52 provided on the inner surface of the upper half 31. In this case, as shown in FIGS. 18 and 19, the thicknesses T ₁ and T ₂ of the bottom of the cylindrical magnet mounting portion 51 are made different from each other so that the magnetic sensor 106 of the drive device 101 and the magnet The distances D ₁ and D ₂ between the magnets 5 may be made different from each other so that the magnetic force of the magnet 5 exerted on the magnetic sensor 106 may be increased or decreased.

Also, as shown in FIG.
The magnet mounting portion 52 may be provided on the outer peripheral wall 32i of the second, and the magnet 5 for type identification may be housed in the magnet mounting portion 52. In this case, the magnetic sensor 106 of the drive device 101 is preferably arranged on the outer peripheral side of the outer peripheral wall 32i of the lower half 32 so as to face the magnet 5.

In the embodiment shown in the drawings, the magneto-optical disk cartridge and the magneto-optical disk drive are shown, but the disk cartridge and the drive may be a magnetic disk cartridge, a magnetic disk drive, or an optical disk cartridge. Or an optical disk cartridge.

[0058]

The disk cartridge and the disk drive of the present invention have the following effects.

(1) In the disk cartridge according to the first aspect, the type of the disk-shaped recording medium is identified by detecting the magnetism of the magnet provided in the cartridge.
Unlike the conventional disk cartridge, it is not necessary to provide a detection hole in the cartridge. In addition, the detection hole,
If it is blocked by a label or the like affixed to the cartridge, it will lose its function as a detection hole.
Although the cartridge cannot be formed in the label attaching area or the like, the arrangement location is restricted. However, since the magnetism is transmitted through the label or the like, the cartridge can be arranged in the label attaching area and the arrangement location is hardly restricted.

(2) In the disk cartridge of the second aspect, since a magnet for type identification is mounted on the front side of the cartridge, the disk cartridge can be easily mounted even after the disk cartridge is assembled. Further, the magnet can be easily replaced.

(3) In the disk cartridge according to the third aspect, since a magnet for type identification is mounted inside the cartridge, it is necessary to provide a recess for mounting the magnet for mounting the magnet on the front side of the cartridge. Disappears. Then, the appearance can be made completely the same as that of the conventional disk cartridge having no magnet.

(4) In the disk cartridge according to the fourth aspect, the magnet can be easily and surely attached to the cartridge in a state where the magnet is fitted in the cylindrical magnet accommodating portion provided inside the cartridge.

(5) In the disk cartridge according to the fifth aspect, the type of the disk-shaped recording medium can be identified by the position of the magnet attached to the cartridge.

(6) According to the disk cartridge of the sixth aspect, the type of the disk-shaped recording medium can be identified in many types by the magnetic force of the magnet attached to the cartridge.

(7) In the disk cartridge according to the seventh aspect, since the depth from the surface of the cartridge to the magnet mounting position is made different, when the disk cartridge is loaded in the disk drive, the magnetic sensor provided in the drive can be used. A difference is automatically generated in the distance from the magnet, and classification using a magnetic sensor is possible even when magnets having the same magnetic force are used.

(8) The disk drive device according to claim 8, wherein the magnetic sensor detects whether or not the disk cartridge is provided with a magnet for type identification, or detects the position and magnetic strength of the magnet, and The type of the cartridge can be identified.

(9) According to the ninth aspect of the present invention, when the disk cartridge is loaded in a disk drive, a magnetic sensor provided in the drive is provided with a magnet for type identification in the disk cartridge. It is possible to quickly and reliably identify whether or not the operation has been performed.

[Brief description of the drawings]

FIG. 1 is an exemplary perspective view of a disk cartridge and a disk drive device according to a first embodiment;

FIG. 2 is a perspective view of a state where the disk cartridge is turned upside down.

FIG. 3 is an exploded perspective view of the disk cartridge.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view showing a modification.

FIG. 6 is a sectional view showing a modification.

FIG. 7 is an exploded perspective view of the disk drive device.

FIG. 8 is a sectional view of a magnetic sensor.

FIG. 9 is a sectional view showing a state where the disk cartridge is loaded in the disk drive device.

FIG. 10 is a sectional view showing a state where a conventional disk cartridge is loaded in a disk drive device.

FIG. 11 is an exemplary perspective view of a disk cartridge and a disk drive device according to a second embodiment;

FIGS. 12A, 12B, and 12C are cross-sectional views of a state in which high-, medium-, and low-capacity disk cartridges are loaded in a disk drive device.

FIG. 13 is an exemplary perspective view of a disk cartridge and a disk drive device according to a third embodiment;

FIGS. 14A, 14B, and 14C are cross-sectional views of a state in which high-, medium-, and low-capacity disk cartridges are loaded in a disk drive device.

FIG. 15 is a sectional view in which a type identification magnet is mounted in the lower half.

FIG. 16 is a sectional view in which a type identification magnet is mounted in the upper half.

FIG. 17 is a perspective view showing a modification of the attachment of the type identification magnet.

FIG. 18 is a cross-sectional view showing a modification of the attachment of the type identification magnet.

FIG. 19 is a cross-sectional view showing a modification example of mounting the type identification magnet.

FIG. 20 is a perspective view showing a modification of the attachment of the type identification magnet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk cartridge, 2 ... Magneto-optical disk, 3 ...
Cartridge, 4 ... Shutter, 5 ... Magnet for type identification, 101 ... Disk drive device, 102 ... Cartridge holder, 103 ... Spindle, 104 ... Pickup, 105 ... Bias coil, 106 ... Magnetic sensor.

Claims (9)

[Claims] 1. A disk cartridge comprising: a disk-shaped recording medium; and a cartridge rotatably storing the disk-shaped recording medium, wherein the cartridge is for identifying a type of the disk-shaped recording medium. A disc cartridge having a type identification magnet. 2. The disk cartridge according to claim 1, wherein the magnet is mounted on a front side of the cartridge. 3. The disk cartridge according to claim 1, wherein the magnet is mounted inside the cartridge. 4. The cartridge according to claim 6, wherein the magnet is accommodated in a cylindrical magnet accommodating portion provided between an arc-shaped rib constituting a disk-shaped recording medium accommodating portion of the cartridge and a peripheral wall portion of the cartridge. A disk cartridge characterized by the following. 5. The disk cartridge according to claim 1, wherein the magnet is mounted at a different position on the cartridge according to the type of the disk-shaped recording medium stored in the cartridge. 6. The disk cartridge according to claim 1, wherein the magnet has a difference in magnetic strength depending on the type of the disk-shaped recording medium stored in the cartridge. 7. The method according to claim 1, wherein the magnet has a difference in the depth from the surface of the cartridge to the mounting position according to the type of the disk-shaped recording medium stored in the cartridge. A disk cartridge characterized by the above-mentioned. 8. A cartridge holder for inserting a disk cartridge, a spindle for rotating a disk-shaped recording medium of the disk cartridge inserted in the cartridge holder, and a spindle for rotating the disk cartridge inserted in the cartridge holder to the disk-shaped recording medium. A recording / reproducing device for recording and / or reproducing, and a disc-shaped recording medium of a disc cartridge inserted into the cartridge holder,
And a magnetic sensor for detecting a type identification magnet provided in the disk cartridge. 9. A disk cartridge in which a disk-shaped recording medium is rotatably housed in a cartridge, a type identification magnet for identifying the type of the disk-shaped recording medium is provided, and recording or / and / or recording of the disk cartridge is performed. A disc drive device for performing reproduction and a magnetic sensor for detecting a type discriminating magnet provided on the disc cartridge is provided.