JPH09330574A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk cartridge having a shutter which makes it possible to set the area of opening of an opening part for recording and/or reproduction to be large and also is excellent in a closing property. SOLUTION: A disk cartridge 1 is equipped with a virtually square cartridge main body 4 having a disk holding part 11 wherein a disk-shaped recording medium 5 is held rotatably and an opening part 14 for recording and/or reproduction through which a recording and/or reproducing means of recording and/or reproducing equipment having a head for recording and/or reproduction enters, and with a plate-shaped shutter member 6 opening and closing the opening part 14 for recording and/or reproduction. When the disk cartridge 1 is charged in the recording and/reproducing equipment, the shutter member 6 moves inside the cartridge main body 4 and opens and closes the opening part 14 for recording and/or reproduction, with the opposite end parts 18 and 19 moved along one lateral side of the cartridge main body 4 on which the opening part 14 for recording and/or reproduction is provided and the lateral side intersecting that lateral side perpendicularly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge in which a disc-shaped recording medium is rotatably accommodated, and more specifically, a disc used in a recording and / or reproducing apparatus having a rotary arm type magnetic head. Regarding the cartridge.

[0002]

2. Description of the Related Art Conventionally, in a disk cartridge, a recording / recording / reproducing apparatus has a cartridge main body having a disk storage portion in which a magnetic recording medium such as a magnetic disk is rotatably stored, and a magnetic head of a recording and / or reproducing apparatus is inserted thereinto. Alternatively, a reproduction opening is formed. Generally, in the disc cartridge, a shutter is attached to the cartridge body in order to prevent dust, dust, or the like from entering through the recording and / or reproducing opening and adhering to the accommodated magnetic recording medium. When used, the recording and / or reproducing openings are closed.

As a disk cartridge to which this shutter is attached, for example, a disk cartridge 100 composed of a slide type shutter 106 shown in FIG.
Alternatively, a disc cartridge 200 or the like including a rotary lid type shutter 206 shown in FIG. 9 has been conventionally known.

The disk cartridge 100 has a magnetic disk 104 housed inside a cartridge body 103 formed by combining an upper half 101 and a lower half 102, and recording and / or recording formed on the front side of the cartridge body 103. A shutter 106 having a substantially U-shaped cross section sandwiching the reproduction opening 105 is provided. The disc cartridge 100 opens and closes the recording and / or reproducing opening 105 by sliding the shutter 106 in the AB direction in FIG.

On the other hand, the disk cartridge 200 includes a magnetic disk 204 inside a cartridge body 203 which is composed of an upper half 201 and a lower half 202.
And a shutter 206 serving as an elongated plate-like member that covers the entire recording and / or reproducing opening 205 formed on the front side surface of the cartridge body 203. The disc cartridge 200 opens the recording and / or reproducing opening 205 by rotating the shutter 206 in the direction A of FIG. 9 and storing it inside the cartridge body 203.

[0006]

By the way, a recording and / or reproducing apparatus for a magnetic recording medium such as a hard disk has a structure in which a magnetic head is attached to an arm that rotates in the horizontal direction with respect to the main surface of the magnetic disk. Is often used. This is because the access speed is faster than that of a linear drive type motor used in, for example, a floppy disk.

When recording and / or reproducing a magnetic disk with a recording and / or reproducing apparatus equipped with such a rotating arm type magnetic head, the magnetic head is inserted in a disk cartridge containing the magnetic disk. It is required to secure a large opening area for the recording and / or reproducing opening. This is because if the opening area of the recording and / or reproducing opening on the disc cartridge side is small,
This is based on the reason that the arm of the recording and / or reproducing apparatus collides with the cartridge main body and the necessary movable range cannot be secured.

With respect to this point, for example, in the conventional disc cartridge 100 shown in FIG.
Due to the above structure, there is a problem that the opening width W ₁₀ of the recording and / or reproducing opening 105 cannot be secured large. That is, in the disc cartridge 100, since the shutter 106 has a structure that slides in the AB direction of FIG. 8, that is, the width direction of the cartridge body 103 as described above, it is premised that the shutter 106 does not protrude from the cartridge body. If so, the width of the shutter 106 and the recording and / or reproducing opening 1 covered by the shutter 106.
This is because the width W ₁₀ of 05 is unavoidably set to be less than half the width of the cartridge body 104.

On the other hand, in the conventional disc cartridge 200 shown in FIG. 9, the opening width W ₂₀ of the recording and / or reproducing opening 205 is set to the cartridge body due to the structure in which the shutter 206 is housed in the cartridge body 203. There is a merit that a large width can be secured close to the full width of 203.

However, the disk cartridge 20
0, the shutter 206 is integrated with the recording and / or reproducing opening 205, and this shutter 206 is shown in FIG.
Even when the recording and / or reproducing opening 205 is opened by rotating in the direction A, the recording and / or reproducing opening 2
The shutter 206 remains above 05. for that reason,
In the disk cartridge 200, this shutter 206
However, there is a problem in that it easily interferes with the entry of the magnetic head.

Further, in the disc cartridge 200,
When the recording and / or reproducing opening 205 is opened, the height H _{20 of the} opening is reduced due to the thickness of the shutter 206. Therefore, in the disc cartridge 200, the thickness of the cartridge body 203 cannot be reduced, and the thickness of the member of the shutter 206 cannot be increased. In addition, since the disk cartridge 200 needs a flange to serve as a rotation support shaft of the shutter 205, the cartridge main body 2
There was a problem that the thickness of 03 could not be reduced.

Further, in the disk cartridge, it is necessary to make the gap between the shutter and the recording and / or reproducing opening as narrow as possible from the viewpoint that the entry of dust and the like into the inside must be suppressed as much as possible. In this respect, in the disc cartridge 200 described above, a gap 207 is formed between the recording and / or reproducing opening 205 and the shutter 206.
However, there is a problem in that the degree of airtightness cannot be ensured with respect to the cartridge body 203.

According to the present invention, in order to solve the above-mentioned problems, the opening area of the recording and / or reproducing opening into which the magnetic head of the recording and / or reproducing apparatus is inserted can be made large and the hermeticity is also excellent. An object is to provide a disk cartridge having a shutter.

[0014]

DISCLOSURE OF THE INVENTION A disk cartridge according to the present invention, which has achieved this object, is a disk housing portion in which a disk-shaped recording medium is rotatably housed, and recording and / or recording provided on at least one side surface. A substantially rectangular cartridge main body having a recording and / or reproducing opening of a recording and / or reproducing device of a recording and / or reproducing apparatus equipped with a reproducing head, and a recording and / or reproducing opening It has a planar shape that is almost the same as the opening shape,
Alternatively, a plate-shaped shutter member that opens and closes the reproduction opening is provided.

When the disk cartridge is loaded in the recording and / or reproducing apparatus, one end of the cartridge body having both ends of the shutter member provided with the recording and / or reproducing openings and the other side surface orthogonal to this side surface. When the shutter member is moved along the inner surface of the cartridge, the shutter member moves inside the cartridge main body to open and close the recording and / or reproducing opening.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a disk cartridge according to the present invention will be described below with reference to FIGS. As shown in FIG. 1, for example, the disc cartridge 1 includes a cartridge body 4 configured by combining an upper half 2 and a lower half 3, and a magnetic disc 5 rotatably housed in the cartridge body 4. Both ends are provided with a shutter 6 that moves along the side surface of the cartridge body 4.

The disc cartridge 1 is assembled by joining the upper half 2 and the lower half 3 of a substantially shallow dish rectangular shape, which are made of a synthetic resin material, at their respective side surfaces, and by ultrasonic welding or the like. The cartridge main body 4 is formed integrally. A magnetic disk 5 is rotatably housed in the cartridge body 4. The magnetic disk 5 is made of, for example, a thin disk-shaped metal having a magnetic layer formed uniformly on its surface,
A magnetic disk 5 on the side of the recording and / or reproducing device in the center thereof
A center hole 7 is formed in which a member (not shown) of a rotation drive unit for rotating the is engaged.

On the inner halves of the upper half 2 and the lower half 3, disc housing walls 8 and 9 are provided upright on the inner surfaces facing each other, each of which is composed of a plurality of arcuate walls located on the same circumference. The disk storage walls 8 and 9 form a disk storage portion 11 in which the magnetic disk 5 is stored in a state where the upper half 2 and the lower half 3 are butted against each other. Further, a drive member insertion hole 11a is formed in the center of the lower half 3 side of the disk storage unit 11 for inserting the member of the rotation drive unit of the recording and / or reproducing apparatus described above.

In the upper half 2 and the lower half 3, the rising side walls 12 (12a, 12b,
12c) and 13 (13a, 13b, 13c) are continuously formed. In the disc cartridge 1, the rising side walls 12 and 13 are joined to each other by being joined together to form a cartridge body 4. As shown in FIGS. 1 and 2, the cartridge main body 4 has a recording and / or reproducing opening into which a magnetic head 34 of a recording and / or reproducing apparatus, which will be described later, enters by opening substantially the entire front side surface thereof. A section 14 is provided.

Further, in the upper half 2 and the lower half 3, shutter guide grooves 15 (15a, 15b), 1 for sliding both end portions of a shutter 6 described later on inner surfaces facing each other are provided.
6 (16a, 16b) are formed. These shutter guide grooves 15 and 16 are each formed in a linear shape, and the shutter guide groove 15 is parallel to the vicinity of the recording and / or reproducing opening 14 and the shutter guide groove 16 is close to the rising side walls 12a and 13a. Are formed in parallel with each other.

These shutter guide grooves 15 and 16 are
The respective one ends are connected to each other, and the whole is a groove having a substantially “L” shape. The shutter guide grooves 15 and 16 engage with the engagement protrusions 21 and 22 formed on both ends 18 and 19 of the shutter 6, which will be described in detail later, in a state where the upper half 2 and the lower half 3 are butted against each other. As a result, the shutter 6 can be moved within the cartridge body 4.
Therefore, the disc cartridge 1 is similar to that shown in FIGS.
As shown in FIG.
Is formed.

In order to prevent dust and the like from entering the cartridge body 4 through the recording and / or reproducing opening 14 and adhering to the magnetic disk 5 housed therein, A shutter 6 that closes the recording and / or reproducing opening 14 is attached.

The shutter 6 is formed of a plate-like member having a substantially rectangular shape as a whole, and has a longitudinal dimension and a height dimension of the recording and / or reproducing opening 14 of the cartridge body 4.
It is almost equal to the opening size. The shutter 6 is
Cylindrical engaging protrusions 21 and 22 are integrally formed at both ends 18 and 19 in the longitudinal direction. Shutter 6
The engaging projections 21 and 22 are the shutter guide grooves 1.
By being slidably engaged with 5, 5 and 16, as shown in FIG. 2, it is possible to move within the shutter movement space 17.

Further, the shutter 6 is formed such that its member thickness is slightly larger than the width of each shutter guide groove 15, 16. Therefore, the shutter 6 includes the engaging protrusions 21,
The recording and / or reproducing opening 14 is closed without a gap in a state where both 22 are engaged with the shutter guide groove 15.

With this structure, the disc cartridge 1 has the recording and / or reproducing opening 14
When the shutter is opened, the shutter 6 is completely separated from the recording and / or reproducing opening 14, so that a large opening can be obtained and the magnetic head of the recording and / or reproducing apparatus can smoothly enter. it can. Further, in the disc cartridge 1, the entire thickness of the cartridge body 4 can be made thin, and the member of the shutter 6 can be made thick.

Next, the case where the disc cartridge 1 is loaded in the recording and / or reproducing apparatus 30 will be described with reference to FIG. The disk cartridge 1 is shown in FIG.
As shown in (A) to (F), when the shutter 6 is inserted into the recording and / or reproducing apparatus 30, the shutter 6 moves in the shutter moving space 17 by the following operations.

First, the disc cartridge 1 is shown in FIG.
As shown in (A), in the state where the shutter 6 completely closes the recording and / or reproducing opening 14, the recording and / or reproducing apparatus 14 has the recording and / or reproducing opening 14 side as the insertion side. It is inserted into the cartridge insertion portion 31 of 30. Next, the disc cartridge 1 is recorded and / or recorded when the cartridge body 4 is inserted to a predetermined position.
Alternatively, as the shutter moving mechanism (not shown) of the reproducing device 30 is operated, as shown in FIGS. 3B and 3C, the end 18 side of the shutter 6 is pressed and the shutter 6 moves in the shutter moving space 17. start. A specific example of this shutter moving mechanism will be described later.

At the same time, the recording and / or reproducing device 3
At 0, the rotation arm 32 starts rotation about the rotation shaft 33 so that the magnetic head 34 enters the recording and / or reproduction opening 14 side. Then, as shown in FIG. 3D, the recording and / or reproducing apparatus 30 uses the shutter 6
The magnetic head 34 is moved into the cartridge body 4 when the recording and / or reproducing opening 14 is opened to some extent by the movement of. When the shutter 6 is moved to the predetermined point, the movement of the shutter 6 is not sufficient by only pressing the end portion 18, so that the end portion 19 side is also pressed.

In this way, the disk cartridge 1
As shown in FIG. 3E, the shutter 6 and the magnetic head 34 are further moved and entered into the cartridge body 4 as the cartridge body 4 is inserted. The cartridge body 4 is used as the recording and / or reproducing device 30.
The movement of the shutter 6 is completed when the cartridge 6 is completely stored in the cartridge insertion portion 31, and the recording and / or reproducing opening 14 is completely opened, as shown in FIG. The magnetic head 34 is located on the recording surface of the magnetic disk 5 in the disk cartridge 1.

After that, the rotary drive shaft of the recording and / or reproducing apparatus 30 is engaged with the center hole 7 of the magnetic disk 5, and the magnetic head 34 slides on the loading lamp 35, so that the disk cartridge. The magnetic disk 5 in 1 is loaded.

In the recording and / or reproducing apparatus 30, the rotary arm 32 is sufficiently moved into the cartridge body 4 by moving the recording and / or reproducing opening 14 of the disc cartridge 1 therein. It is enough to open it as much as possible. Therefore, the recording and / or reproducing device 3
At 0, the efficiency of closing the recording and / or reproducing opening 14 is taken into consideration, and the disc cartridge 1
The shutter 6 may be stopped at a predetermined position.

When the disk cartridge 1 is taken out from the recording and / or reproducing apparatus 30, the shutter 6 is closed by the reverse operation described above. That is, when the disk cartridge 1 is taken out from the recording and / or reproducing apparatus 30, the cartridge body 4 is the recording and / or reproducing apparatus 3.
Operation of moving the end portion 19 side of the shutter 6 while being discharged from the cartridge insertion portion 31 of 0, the magnetic head 34
The operation of rotating the shutter 6 and the operation of moving the end portion 18 side of the shutter 6 to the end portion of the shutter guide groove 15 may be performed at a predetermined timing.

Here, an example of a concrete configuration of the shutter moving mechanism of the recording and / or reproducing apparatus 30 and the shutter 6 in the disc cartridge 1 operated by the shutter moving mechanism will be described with reference to FIGS. 4 and 5. explain. The shutter moving mechanism 40 is, for example, an elongated rod-shaped insertion member 41 that is movably arranged in the cartridge insertion portion 31 and is inserted into the cartridge body 4, and the insertion member 41.
An engaging member 43, which is connected to a tip end side of the rotatably in a horizontal direction by a support shaft 42 and has a tip end serving as an engaging claw portion having a substantially L-shaped cross section, is configured.

On the other hand, the shutter 6 is
An engagement hole portion 23 having a substantially L-shaped cross section is formed in which the engagement member 43 of the shutter moving mechanism 40 is fitted. With such a configuration, the disc cartridge 1
The inner shutter 6 can move smoothly in the cartridge body 4 by pressing or pulling the insertion member 41 with the engagement member 43 engaged with the engagement hole 23. To release the engagement between the shutter 6 and the shutter moving mechanism 40, the insertion member 41 may be moved upward.

The disc cartridge 1 is not limited to the above-described embodiment, but various modifications can be made within the scope of the present invention. For example, in this embodiment, the shutter 6 and the recording and / or reproducing opening 1 are provided.
Although the longitudinal width of the cartridge 4 is made close to the width of the front surface of the cartridge body 4, the recording and / or reproducing opening 14 is
The width may be such that the rotary arm 32 of the recording and / or reproducing apparatus 30 is inserted and a necessary movable range thereof can be secured.

With respect to the longitudinal dimension of the shutter 6, the shorter it is, the narrower the shutter moving space 17 can be made. As a result, the planar dimension of the cartridge body 4 can be made smaller. Therefore, how to set the longitudinal width of the recording and / or reproducing opening 14 and the corresponding longitudinal dimension of the shutter 6 is a balance between the moving space of the magnetic head 34 and the demand for miniaturization of the disk cartridge 1. Will be determined by

Further, in the disc cartridge 1, the shutter guide grooves 15 and 16 are formed linearly, but the shape of the shutter guide grooves is not limited to this. It may be curved for smoothness.

Next, a disk cartridge 50 according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. The same members or corresponding members as those of the disc cartridge 1 will be described using the same reference numerals.

As shown in FIG. 6, the disc cartridge 50 has a structure in which the recording and / or reproducing opening 14 is closed by a pair of shutters 6 (6A, 6B). The disc cartridge 50 is assembled by joining the upper half 2 and the lower half 3 having a substantially shallow dish shape, which are made of a synthetic resin material, at their respective side surfaces, and these are integrated by ultrasonic welding or the like. , The cartridge body 4 is configured.

A magnetic disk 5 is rotatably housed in the cartridge body 4. This magnetic disk 5
Is formed of, for example, a thin disk-shaped metal having a magnetic layer formed uniformly on its surface, and a center of which a member (not shown) of a rotation driving unit on the recording and / or reproducing apparatus side is engaged. A hole 7 is drilled.

The upper half 2 and the lower half 3 are provided with disk storage walls 8 and 9 which are formed on the inner surfaces facing each other and are composed of a plurality of arcuate walls located on the same circumference. The disk storage walls 8 and 9 form a disk storage portion 11 in which the magnetic disk 5 is stored in a state where the upper half 2 and the lower half 3 are butted against each other. A drive member insertion hole 11a is formed in the center of the lower half 3 side of the disk storage unit 11 for inserting a member (not shown) of the rotation drive unit of the recording and / or reproducing apparatus for rotating the magnetic disk 5. Has been formed.

In the upper half 2 and the lower half 3, the rising side walls 12 (12a, 12b,
12c) and 13 (13a, 13b, 13c) are continuously formed, and the rising side walls 12 and 13 are joined and integrated with each other to form the cartridge body 4. The cartridge body 4 is provided with a recording and / or reproducing opening 14 into which the magnetic head 34 of the above-described recording and / or reproducing apparatus 30 is inserted by opening substantially the entire front surface thereof.

Further, in the upper half 2 and the lower half 3, shutter guide grooves 15 (15a, 15) for sliding both end portions of a pair of shutters 6 to be described later on inner surfaces facing each other.
b), 16 (16a, 16b, 16c, 16d) are formed. The shutter guide grooves 15 and 16 are each formed in a linear shape, and
Is parallel to the vicinity of the recording and / or reproducing opening 14, and the shutter guide grooves 16a, 16b are raised and the side walls 12a,
Shutter guide grooves 16c, 16 parallel to the vicinity of 13a.
d is formed parallel to the rising sidewalls 12c and 13c.

These shutter guide grooves 15 and 16 are
The ends are connected to each other, and the whole is a substantially U-shaped groove. The shutter guide grooves 15 and 16 engage with the engagement protrusions 21 and 22 formed on both ends 18 and 19 of the shutter 6, which will be described in detail later, in a state where the upper half 2 and the lower half 3 are butted against each other. As a result, the shutter 6 can be moved within the cartridge body 4.
Therefore, in the disc cartridge 50, shutter movement spaces 17 (17A, 17B) are formed at both corners of the upper and lower halves 2 and 3 where the shutter guide grooves 15 and 16 are connected. In order to prevent dust and the like from entering the inside of the cartridge body 4 from the recording and / or reproducing opening 14 and adhering to the magnetic disk 5 housed in the cartridge body 4, the recording and / or reproducing operation is performed. Alternatively, a pair of shutters 6 (6A, 6B) that close the reproduction opening 14 are attached.

Each of these shutters 6 is entirely formed of a substantially rectangular plate-like member, and the height dimension thereof is recorded and / or recorded.
Alternatively, the height is substantially equal to the height of the reproduction opening 14. On the other hand, each shutter 6 records and / or records its longitudinal dimension.
Alternatively, it is approximately one half of the longitudinal dimension of the reproduction opening 14.

Each shutter 6 has cylindrical protrusions 21 and 2 at its outer end 18 and inner end 19 in the longitudinal direction.
2 are integrally formed. Each of the shutters 6 can move in the shutter movement space 17 by the engagement protrusions 21 and 22 slidably engaged with the shutter guide grooves 15 and 16. In addition, each shutter 6
As shown in FIG. 6, the member has a thickness slightly larger than the width of each shutter guide groove 15, 16.
Therefore, each shutter 6 closes the recording and / or reproducing opening 14 without a gap when both the engaging protrusions 21 and 22 are engaged with the shutter guide groove 15.

In this disc cartridge 50, the shutter 6 that closes the recording and / or reproducing opening 14 is divided into two parts, which are left and right, so that the shutters 6 of the disc cartridge 1 and the disc cartridge 50 move. As is clear from FIG. 7, which is a comparative example, it is possible to make the planar size of the cartridge main body 4 relatively smaller than that of the disk cartridge 1 having one shutter 6.

That is, the disc cartridge 50 is
The longitudinal dimension W ₂ of each shutter 6 is approximately half of the longitudinal dimension W ₁ of the shutter 6 of the disc cartridge 1, and accordingly, each shutter moving space 17 is also greatly reduced and the shutter moving space 17 is reduced. Since it is divided into two parts on the left and right sides, they are arranged in a well-balanced manner, and as a result, the depth width and the width of the cartridge body 4 can be shortened.

[0049]

As described in detail above, the disk cartridge according to the present invention is provided with the plate-like shutter member having a plane shape substantially equal to the opening shape of the recording and / or reproducing opening. Both ends of the shutter member are moved along the inner surface of one side surface of the cartridge main body provided with the recording and / or reproduction opening and the other side surface orthogonal to this side surface, whereby the shutter member moves inside the cartridge main body. However, since the recording and / or reproducing opening is opened and closed, it is possible to secure the recording and / or reproducing opening in a large area and to secure the hermeticity in the disc cartridge. Becomes

[Brief description of drawings]

FIG. 1 is a first disc cartridge to which the present invention is applied.
FIG. 2 is an exploded perspective view showing the configuration of the embodiment.

FIG. 2 is a perspective view showing how the shutter of the disc cartridge moves in the cartridge body.

FIG. 3 is a diagram continuously showing the operation of the shutter and the rotating arm of the recording and / or reproducing apparatus when the disc cartridge is inserted into the cartridge inserting portion of the recording and / or reproducing apparatus.

FIG. 4 is a configuration diagram showing an example of a shutter and a shutter moving mechanism of a recording and / or reproducing apparatus.

FIG. 5 is a cross-sectional view showing an example of the shutter and a shutter moving mechanism.

FIG. 6 is a transparent plan view showing another embodiment of the disc cartridge.

FIG. 7 is a perspective plan view showing an essential part of the disk cartridge according to the first embodiment of the present invention and the disk cartridge according to the second embodiment of the present invention in comparison.

FIG. 8 is a perspective view schematically showing the configuration of a conventional disk cartridge for a magnetic disk.

FIG. 9 is a perspective view schematically showing a configuration of a conventional disk cartridge of a magnetic disk.

[Explanation of symbols]

1 disc cartridge, 2 upper half, 3 lower half, 4 cartridge body, 5 magnetic disc, 6 shutter, 11 disc storage part, 14 recording and / or reproducing opening part, 15, 16 shutter guide groove, 17
Shutter movement space 21, 22 Engagement protrusion, 30 Recording and / or reproducing device, 31 Cartridge insertion part, 3
2 rotating arms, 34 magnetic heads

Claims (2)

[Claims] 1. A disk storage unit in which a disk-shaped recording medium is rotatably stored, and a recording and / or recording apparatus having a recording and / or reproducing head provided on at least one side surface.
Alternatively, it has a substantially rectangular cartridge main body having a recording and / or reproducing opening into which the recording and / or reproducing means of the reproducing device enters, and a planar shape substantially equal to the opening shape of the recording and / or reproducing opening. And a plate-shaped shutter member that opens and closes the recording and / or reproducing opening, wherein the shutter member includes one side surface of the cartridge main body provided with the recording and / or reproducing opening portion, and this side surface. A disk cartridge, characterized in that both ends thereof are moved along the inner surface of the other side surface orthogonal to the above to move inside the cartridge main body to open and close the recording and / or reproducing opening. 2. A cartridge having a pair of shutter members divided into recording and / or reproducing openings, and each shutter member having the recording and / or reproducing openings at both ends thereof. The disk cartridge according to claim 1, wherein the disk cartridge is moved along one side surface of the main body and each side surface orthogonal to the side surface.