JPH07287956A - Disk cartridge - Google Patents

Abstract

PURPOSE:To obtain a disk cartridge capable of smoothly opening/closing a shutter and also surely opening or opening holes. CONSTITUTION:The shutter 8 provided so as to cover the opening holes 2v, 2w is fixed on a 1st shutter guide 9 and a 2nd shutter guide 19, then the both shutter guides 9, 19 are connected to a shutter opening member 15 to move them at the same time. Thus, the opening holes 2v, 2w are opened or closed by the shutter 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge for accommodating a disc used in a recording or reproducing apparatus, and is particularly suitable for a disc cartridge used in a recording or reproducing apparatus having a plurality of heads.

[0002]

2. Description of the Related Art Generally, a disc such as an optical disc is housed inside a disc cartridge in consideration of adhesion of dust or fingerprints and operability of a recording or reproducing device (hereinafter, simply referred to as a recording / reproducing device). ing. The disk cartridge is usually provided with an opening hole that allows the insertion of a head or a disk motor, and is equipped with a shutter that can close the opening hole.

In recent years, optical discs have been widely applied to the field of video as large-capacity recording media that can be randomly accessed. In particular, it is equipped with multiple heads to record high-quality digital images, which speeds up the recording rate.
Also, a recording / reproducing apparatus has been developed which makes the recording rate constant. As a disc cartridge used in this recording / reproducing apparatus, as described in Japanese Patent Application No. 4-327751, opening holes are provided on both sides of the center of the disc so that a head can be inserted. Have been developed.

An example of the above-mentioned conventional disk cartridge will be described below with reference to the drawings. Figure 1
7, FIG. 18 and FIG. 19 show a conventional disc cartridge, FIG. 17 is an exploded perspective view of the whole disc cartridge,
FIG. 18 is a schematic perspective view of the entire disc cartridge with the opening hole closed by the shutter, and FIG. 19 is a schematic perspective view of the entire disc cartridge with the opening hole opened by the shutter.

In FIGS. 17, 18, and 19, the depth direction of the disc cartridge is the y direction, the width direction of the disc cartridge is the x direction, and the thickness direction of the disc cartridge is the z direction.

[0006] Reference numeral 101 denotes a disc, which records information on both sides. The surface on the + z side of the disk 101 is the first surface 1
01a, and the surface on the −z side is the second surface 101b. The disc cartridge includes an upper half 10 having a disc storage recess 102 for rotatably storing a disc 101.
3, the disk 10 on the housing 105 composed of the lower half 104
Holds 1.

Reference numeral 106 denotes an upper half 103 and a lower half 104.
Heads (not shown) for recording or reproducing information are formed on both sides of the disc 101 so that the disc 101 can be seen through the opening holes formed in the disk. The opening hole 106 in the + y direction from the center of the disc 101
Is a turntable (not shown) or disc 101
An arc-shaped opening hole is formed integrally so that a clamper (not shown) for fixing the tongue to a turntable (not shown) can be inserted.

Further, the + y-direction end edge of the casing 105 is
A rail-shaped convex portion 107 is formed so as to extend in the x direction and engages with a groove portion 120a of the shutter guide 120 described later.

Further, the edge of the housing 105 in the -x direction is
The rail-shaped convex portion 108 is formed so as to extend in the y direction, and engages with the groove portion 130a of the shutter opening member 130 described later.

The edge of the housing 105 in the -y direction is
A step portion 109 to which a shutter retainer 140 that guides an end portion of a shutter 150, which will be described later, is attached is formed one step lower than the outer surface. Further, a step portion 110 is formed which is one step lower than the step portion 109 and to which a shutter 150 described later moves.

The shutter 150 is a thin plate-like member that is bent in a U shape when viewed from the x direction, and has a first surface side 101a and a second surface side 101b so as to cover the opening hole 106.
And extends in the y direction. The first surface side 101a and the second surface side 101b of the shutter 150 bent in a U shape are basically parallel to each other in the portions extending in the y direction, but in reality, the springback generated at the time of bending. Due to this, it is in a slightly open state. Further, the shutter 150 is
The shutter guide 12 to be described later is a U-shaped connecting portion.
A hole (not shown) for fixing to 0 is provided.

The shutter guide 120 is the shutter 15
0 is fixed, and a belt 160 described later is fixed at one end. Further, two groove portions 120a that engage with the convex portion 107 provided in the housing 105 are formed in the z direction, and a hole 120b for hooking the spring 170 is provided at the other end. Reference numeral 130 denotes a cartridge opening member, which is provided with a groove portion 130a for fixing a belt 160, which will be described later, and engaging with the convex portion 108 provided on the housing 105. Belt 160
Both ends are fixed to the shutter guide 120 and the cartridge opening member 150, and are thin resin plates. The spring 170 is suspended between the shutter guide 120 and the housing 105, and biases the shutter 150 in the direction of closing the opening hole 106. The shutter retainer 140 retains the end portion of the shutter 150, is attached to the step portion 109 provided in the housing 105, and guides the shutter 150.

The operation of the conventional disk cartridge having the above structure will be described below.
As shown in FIG. 18, when a disk cartridge with the shutter 150 closing the opening 106 is inserted into the recording / reproducing apparatus, a claw (not shown) provided in a cartridge transport mechanism (not shown) provided in the recording / reproducing apparatus. (Not shown) and the end surface 130b of the shutter opening member 130 come into contact with each other, and as a result, the shutter opening member 130 is -y with respect to the housing 105.
Move in the direction. Then, the shutter guide 120 connected by the belt 160 also moves in the −x direction, and the shutter 15
0 also moves in the −x direction, and as shown in FIG. 19, with the shutter 150 open, the opening hole 106 is opened, and the head, turntable, and clamper (not shown) can be inserted into the opening hole 106. become. And
The disc cartridge enters the inside of the device by a recording / reproducing device (not shown), the disc 101 is fixed by a turntable and a clamper (not shown), and is set so as not to come into contact with the disc housing recess 102 of the disc cartridge, and is in a rotatable state. become.

[0014]

However, in the above-mentioned conventional structure, since it corresponds to a recording / reproducing apparatus in which a plurality of heads are provided on one side or both sides of the disc 101, a plurality of opening holes 106 are provided in one shutter 150. If the shutter 150 is opened / closed, the shutter 150 becomes relatively long in the y direction. In particular, a large-diameter disk 101 having a diameter of 300 mm, etc.
In this case, the y direction of the shutter 150 is about 300 mm, and when the shutter 150 is opened and closed, simply driving the shutter guide 120 side causes friction between the end of the shutter 150 and the shutter retainer 140 or the casing 105. Due to the resistance, the end of the shutter 150 does not follow the operation on the side of the shutter guide 120 and becomes jerky, and there is a problem that the shutter 150 cannot be opened and closed smoothly and the opening hole 106 cannot be completely opened. Was.

Further, in the above-mentioned conventional structure, especially in the case of a large-diameter disk 101 having a diameter of 300 mm, the y-direction of the shutter 150 is about 300 mm, so that the warpage of the shutter 150 in the y-direction is large. Further, due to the springback that occurs when the shutter 150 is bent in a U-shape, the shutter 150 is assembled with the end portion opened. Therefore, the shutter 150 and the housing 1
There is also a problem that the gap between the disk 101 and the disk becomes large, and dust and dirt enter the inside of the housing through the clearance and adhere to the disk 101.

The present invention solves the above-mentioned conventional problems, and provides a cartridge corresponding to a recording / reproducing apparatus having a plurality of heads on one side or both sides of a disk.
It is an object of the present invention to provide a disc cartridge that smoothly opens and closes a shutter and surely opens an opening hole.

Further, the present invention solves the above-mentioned conventional problems. In a disk cartridge corresponding to a recording / reproducing apparatus having a plurality of heads on one side or both sides of the disk, dust, dirt, and the like inside the housing. The present invention provides a disc cartridge that suppresses entry into the disc.

[0018]

In order to achieve this object, a disk cartridge of the present invention comprises a housing having a disk storage recess for rotatably storing a disk therein,
In order to allow at least insertion of the head of the recording or reproducing apparatus, an opening hole provided on both sides with the center of the disc sandwiched, a shutter provided so as to cover the opening hole, and a housing are provided. A first shutter guide that is movably arranged to fix the shutter, a shutter opening member that is connected to the first shutter guide, and a housing opposite to the first shutter guide with the center of the disc sandwiched therebetween. A second shutter guide that is movably arranged on the body and that fixes the shutter is provided, the second shutter guide and the shutter opening member are connected, and the shutter opening member is moved, so that the shutter opens and closes the opening hole. As possible, the first shutter guide and the second shutter guide are configured to move.

Further, the disk cartridge of the present invention is
A housing having a disk housing recess for rotatably housing a disk and an opening hole provided on both sides of the disk center so that at least the head of a recording or reproducing device can be inserted. A shutter provided so as to cover the opening hole, a first shutter guide movably arranged in the housing to fix the shutter, and a first shutter opening member connected to the first shutter guide. A second shutter guide that is movably disposed in the housing and is connected to the second shutter guide on the opposite side of the first shutter guide with the center of the disc interposed therebetween. The shutter opening member of the first shutter opening member and the second shutter opening member are simultaneously moved so that the shutter can open and close the opening hole. And the disk cartridge configured to move the Ttagaido and second shutter guide.

Further, the aperture includes the center of the disc,
There may be one. Also, the shutter is
A first shutter for covering an opening hole provided on one surface side of the disc and a second shutter for covering an opening hole provided on the other surface side of the disc are provided, and an end portion of the shutter is covered. A disc cartridge having a cover sheet provided as described above is provided.

[0021]

With this configuration, in the disc cartridge corresponding to the recording / reproducing apparatus in which a plurality of heads are provided on one side or both sides of the disc, both the first shutter guide and the second shutter guide are driven simultaneously, and the shutter By performing opening and closing on both the first shutter guide side and the second shutter guide side, jerky operation due to friction between the shutter and the housing is eliminated, the shutter is opened and closed smoothly, and the opening hole is surely opened. It can be opened.

Further, by providing the first shutter and the second shutter and eliminating the process of bending the shutter,
An assembly error due to processing distortion is eliminated, a gap between the shutter and the housing can be suppressed, and dust and the like can be prevented from entering the inside of the housing.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of the entire disc cartridge, FIG. 2 is an enlarged view showing a part of FIG. 1, and FIG.
1 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 4 is an enlarged cross-sectional view showing a cross section of a part of the shutter, FIG. 5 is a schematic perspective view of the entire disc cartridge with the opening hole closed by the shutter, and FIG.
FIG. 3 is a schematic perspective view of the entire disc cartridge with a shutter opening an opening. The drawings and description of the recording / reproducing apparatus are omitted.

1 to 6, the depth direction of the disc cartridge is the y direction, the width direction of the disc cartridge is the x direction, and the thickness direction of the disc cartridge is the z direction.

Reference numeral 1 in the figure denotes a disk having a recording surface on one side or both sides. For the sake of convenience, the + z side of the disk 1 will be referred to as the first surface 1a, and the −z side surface will be referred to as the second surface 1b. Reference numeral 2 denotes a housing, which is configured by an upper half 2a and a lower half 2b made of a resin such as ABS that are screwed, heat-welded, or fixed with an adhesive. 2c is formed. Since the upper half 2a and the lower half 2b have the same structure, only one of them will be described.

2v is an opening hole formed in each of the upper half 2a and the lower half 2b, for example, two holes each corresponding to the first surface side 1a and the second surface side 1b of the disc 1, respectively.
Of the four heads provided in total, the head on the −y direction side is formed so that the recording surface of the disk 1 can be seen. Further, 2w is also an opening hole formed in the upper half 2a and the lower half 2b so that the head on the + y direction side can see the recording surface of the disk 1, and the turn provided in the recording / reproducing apparatus is also provided. It is formed to allow the insertion of a table and a clamper.

Reference numeral 2n is a positioning hole formed in the two corners of the housing 2 and enables the housing 2 to be positioned when it is inserted into the recording / reproducing apparatus. Reference numeral 2u is a positioning recess formed near the other two corners of the housing 2, and is a so-called stocker type recording in which a plurality of disc cartridges are housed in the recording / reproducing device and the disc cartridges are automatically mounted and ejected. It is compatible with a playback device and enables chucking of an automatic loading mechanism for disk cartridges. Reference numeral 2d denotes a V-shaped positioning recess formed near the two corners of the housing 2 in the + y direction, and enables chucking when inserted into the recording / reproducing apparatus. Reference numeral 2e denotes a cylindrical convex portion formed inside the two corner portions of the housing 2 in the + x direction, and positions a pin 12 which hooks one end of a spring 11 described later to stop the pin 12. Reference numeral 2f is a cylindrical convex portion formed inside the end portion of the housing 2 on the −x direction side as well, and positions the pulley 13 described later. Reference numeral 2g is a rail-shaped convex portion formed on the edge of the housing 2 in the + y direction and into which a concave portion 9a of the first shutter guide 9 described later is fitted, and extends in the x direction.

In FIG. 3, reference numeral 2h denotes a second shutter guide 1 which will be described later and is formed near the −y direction end of the housing 2.
9 is a rail-shaped convex portion into which the concave portion 19a of 9 is fitted, and extends in the x direction. Further, 2i is a long hole portion along the convex portion 2h, which is set so that a convex portion 19b formed on a second shutter guide 19 described later penetrates and the second shutter guide 19 can be moved. Has been done. Reference numeral 2j is a step portion to which a cover sheet 14 described later is attached, and is formed to be one step lower than the outer shape of the housing 2. Reference numeral 2k is a rail-shaped projection that is formed at the end of the housing 2 in the −x direction and into which a recess 15a of a shutter opening member 15 to be described later is fitted, and extends in the y direction. Reference numeral 2m denotes a step portion formed on the outer surface of the housing, to which a shutter 8 described later is attached slidably in the Y direction, and is formed one step lower than the step portion 2j.

The eight shutters are thin plate-like members that are bent in a U shape when viewed from the x direction, and have an opening 2 in the housing 2.
It extends in the y direction on the first surface side and the second surface side of the housing 2 so as to cover v and 2w. Further, the shutter 8 is a U-shaped connecting portion and is provided with a hole (not shown) for fixing to a first shutter guide 9 which will be described later. Further, the shutter 8 is provided at its end with a hole 8a for fixing to a second shutter guide 19 described later. The shape of the holes fixed to the first shutter guide 9 and the second shutter guide 19 is, as shown in FIG. 4, a conical shape so that the head of the countersunk screw 16 or the like does not protrude from the surface of the shutter 8. Is formed in. Further, generally, the shutter 8 is formed of a stainless steel plate having a thickness of about 0.1 to 0.5 mm or a resin.

Reference numeral 9 denotes a first shutter guide, which is a shutter 8
Secure the U-shaped connecting part with screws. Further, a groove-shaped concave portion 9a is formed, and is fitted into a convex portion 2g formed inside the + y-direction end of the housing 2 so as to be slidable in the x-direction. The shutter 8 serves as a guide when moving in the x direction with respect to the housing 2. Further, the first shutter guide 9 has a hole 9b formed at one end for hooking a spring 11 described later. Further, a hole (not shown) for fixing a first belt 21 described later is formed at the other end.

Reference numeral 19 is a second shutter guide, and convex portions 19b are formed on both sides of the rectangular parallelepiped in the z direction. Convex portion 19
b penetrates the long hole portion 2i formed in the housing 2 and is fixed to the hole 8a provided at the end portion of the shutter 8 by screwing or the like. Furthermore, a groove-shaped recess 19a is formed, and
It is fitted into the convex portion 2h formed inside the end in the y direction, and x
It is set to slide in the direction. And the shutter 8
Serves as a guide when moving in the x direction with respect to the housing 2. Further, the second shutter guide 19 is formed with a hole 19c for catching a spring 11 described later. Further, a hole (not shown) for fixing a second belt 22 described later is formed.

Reference numeral 15 is an elongated shutter opening member, which has a groove-shaped concave portion 15a formed therein and is fitted into a convex portion 2k formed inside the −x-direction end of the housing 2 so as to be movable in the y-direction. Has been done. Further, a first belt 21, which will be described later,
A hole (not shown) for fixing the second belt 22 is formed. The material of the first shutter guide 9, the second shutter guide 19, and the shutter opening member 15 is preferably resin such as polyacetal, which not only has a small sliding resistance but also serves as a material itself. It is preferable that the resin (in this embodiment, the housing 2 made of a resin such as ABS) has less abrasion and wear.

Reference numeral 13 is a pulley, which is located on the −x direction side of the housing 2.
Four protrusions are provided so as to be positioned by the cylindrical protrusions 2f formed inside the two corners, and to guide the first belt 11 and the second belt 22 described later. 21
Is a first belt and has a hole 21a provided at one end.
Is fixed to the end of the first shutter guide 9 with screws or the like. Also, screw the other end, etc.
It is fixed to the + y-direction end of the shutter opening member 15.
Reference numeral 22 is a second belt, and one end thereof is fixed to a hole 19c formed in the second shutter guide 19 by screwing or the like. The other end is also fixed to the + y-direction end of the shutter opening member 15 by screwing or the like. In addition,
The second belt 22 is fixed to the shutter opening member 15 in a state in which the second belt 22 is folded back along the middle of the four pulleys 13 and overlaps with the first belt 21. Therefore, the shutter 8 includes the first shutter guide 9 and the second shutter guide 9.
Through the shutter guide 19 of the shutter opening member 15
The shutter 8 is configured to open and close the opening holes 2v, 2w by being connected to the shutter opening member 15 and moving the shutter opening member 15.

Reference numeral 11 is a spring, and two springs are arranged in the y direction. The spring 11 arranged on the + y side has one end hooked on the pin 12 and the other end hooked on a hole 9b formed at the + x direction end of the first shutter guide 9. -Y
One end of the spring 11 arranged on the side is hooked on the pin 12, and the other end is hooked on a hole 19c formed at the + x direction end of the second shutter guide 19. And
The spring 11 biases the shutter 8 in a direction to close the opening holes 2v and 2w when the cartridge is not mounted in the recording / reproducing apparatus, that is, when the cartridge is in a normal state.

Reference numeral 14 shown in FIGS. 1 and 5 is a cover sheet.
In order to cover the screw and the like for fixing the hole 8a provided in the end portion of the shutter 8 and the protrusion 19b formed in the second shutter guide 19 and the long hole portion 2i formed in the housing 2, It is attached to the step portion 2j of the housing 2 by adhesion or the like so that it does not protrude from the surface of the housing 2.

The operation of the disc cartridge constructed as above will be described. First, the operation of mounting and positioning the disc cartridge in the recording / reproducing apparatus will be described.

The shutter 8 shown in FIG. 5 has opening holes 2v and 2w.
When the −y side of the disc cartridge in the closed state is grasped and inserted into the recording / reproducing apparatus from the + y side of the housing 2,
The end surface 15b of the shutter opening member 15 comes into contact with the claw of the cartridge guide mechanism included in the recording / reproducing apparatus. Further, when the cartridge is inserted in the + y direction, the shutter opening member 15 is locked by the claw, and only the housing 2 moves in the + y direction. That is, the housing 2 and the shutter opening member 15 move relative to each other, and the shutter opening member 15 moves in the −y direction with respect to the housing 2 (FIG. 6). Then, the shutter 8 starts moving in the −x direction via the first belt 21 and the first shutter guide 9. At the same time, the end portion of the shutter 8 moves in the −x direction via the second belt 22 and the second shutter guide 19. And
The shutter 8 moves so as to completely open the opening holes 2v, 2w, and the spring 11 hooked on the first shutter guide 9 and the second shutter guide 19 is pulled in the −x direction. Then, when the opening holes 2v, 2w are completely opened, the cartridge is chucked by the recording / reproducing device by the positioning recess 2d formed in the housing 2.
As shown in FIG. 6, the shutter 8 opens the opening holes 2v and 2w.

Then, the recording / reproducing apparatus draws the cartridge into the inside of the apparatus, and the positioning hole 2n is fitted into the positioning pin or the like provided in the recording / reproducing apparatus to accurately position the housing 2. Further, the turntable and the clamper of the recording / reproducing apparatus are inserted into the opening 2w, and the disc 1 is coaxially placed on the turntable.
Is fixed with a clamper. In addition, for example, two holes are provided on both sides of the first surface side and the second surface side from each of the opening holes 2v and 2w.
Then, a total of four heads are inserted, and recording or reproduction is possible on the disc 1.

Next, the operation of ejecting the disc cartridge from the recording / reproducing apparatus will be described. First, the clamp of the disc 1 is released, and at the same time, the turntable and the clamper are ejected from the opening holes 2w, and further the heads are ejected from the opening holes 2v and 2w. Next, the fitting between the positioning hole 2n and the positioning pin or the like is released. Then, the disc cartridge is ejected along the reverse path, and when the positioning recess 2d formed in the housing 2 is unchucked, the cartridge is moved in the -y direction by a spring or the like provided in the recording / reproducing apparatus. To do. In the course of the movement, the claw of the recording / reproducing apparatus is moved to the end surface 1 of the shutter opening member 15.
When it is separated from 5b, the restoring force of the spring 11 causes the opening 2
The shutter 8 moves in the + x direction so that v and 2w are completely closed, and at the same time, the shutter is released via the first shutter guide 9, the second shutter guide 19, and the first belt 21 and the second belt 22. The opening member 15 moves in the + y direction relative to the housing 2.

Then, even if it is discharged from the recording / reproducing apparatus,
Since the shutter 8 is permanently pulled by the spring 11, the elongated hole portion 2i and the opening holes 2v and 2w are permanently closed. As described above, according to the present embodiment, both the first shutter guide 9 and the second shutter guide 19 are provided in the disc cartridge corresponding to the recording / reproducing apparatus in which a plurality of heads are provided on one side or both sides of the disc 1. Are simultaneously driven to open and close the shutter 8 by opening and closing the first shutter guide 9
By performing both on the side of the shutter 8 and on the side of the second shutter guide 19, the jerky operation due to the friction between the shutter 8 and the housing 2 is eliminated, and the opening and closing of the shutter 8 is smoothly performed.
In addition, the opening holes 2v, 2w can be surely opened or closed.

By disposing the cover sheet 14 so as to cover the end portion of the shutter 8 and the second shutter guide 19 so as to cover the long hole portion 2i penetrating the housing 2, the cover sheet 14 is removed from the long hole portion 2i. It is possible to suppress dust and dirt from entering and reduce adverse effects on the mechanism inside the disk cartridge.

Further, the first shutter guide 9 and the second shutter guide 19 are connected to one shutter opening member 15 via a belt or the like, and one shutter opening member 1 is connected.
Since the opening holes 2v, 2w are opened and closed by moving the shutter 5, the number of parts can be reduced.

Next, a second embodiment of the present invention will be described with reference to the drawings. 7 is an exploded perspective view of the entire disc cartridge, and FIG. 8 is an enlarged view showing a part of FIG.

In FIGS. 7 and 8, 1 is a disk, 2 is a housing, 2a is an upper half, 2b is a lower half, 2v, 2w.
Is an opening hole, 2n is a positioning hole, 2u is a positioning recess, 2
d is a V-shaped positioning concave portion, 2e, 2f are cylindrical convex portions, 2g, 2h (shown in FIG. 3), 2k is a rail-shaped convex portion, 2i is an elongated hole portion, 2j, 2m are step portions, 8 is a shutter,
Reference numeral 9 is a first shutter guide, 19 is a second shutter guide, 11 is a spring, and 14 is a cover sheet. The above is the same as the configuration of FIG. 1 and its description is omitted.

The feature of this embodiment is the configuration described below. Reference numeral 2p denotes a rail-shaped convex portion formed inside the + x direction end of the housing 2 and symmetrical with the rail-shaped convex portion 2k formed at the −y direction end of the housing 2 with respect to the y axis. Reference numeral 15 denotes a first shutter opening member, which has a groove-shaped concave portion 15a formed therein, and is fitted into the convex portion 2k formed on the housing 2, and y
It is set to be movable in the direction. Further, a hole (not shown) for fixing a first belt 21 described later is formed. Reference numeral 25 is a second shutter opening member, which is a groove-shaped recess 25.
a is formed, is fitted into the convex portion 2p formed on the housing 2, and is set to be movable in the y direction. further,
A hole (not shown) for fixing a second belt 22, which will be described later, is formed and is symmetrical with respect to the first shutter opening member 15 with respect to the y axis.

Denoted at 13 is a pulley, which is positioned by a cylindrical convex portion 2f formed on the housing 2, and eight pulleys 13 are provided so as to guide a first belt 21 and a second belt 22 which will be described later. Reference numeral 21 denotes a first belt, which has a hole (not shown) provided at one end thereof for the first shutter guide 9
Is fixed to the end in the -x direction by screws or the like. The other end is also fixed to the + y direction end of the first shutter opening member 15 by screwing or the like. A second belt 22 is fixed at one end to the hole 19c formed at the −x direction end of the second shutter guide 19 by screwing or the like. The other end is also fixed to the + y direction end of the second shutter opening member 25 by screwing or the like. Therefore, the shutter 8 is connected to the first shutter opening member 15 via the first shutter guide 9. Further, the end portion of the shutter 8 is connected to the second shutter opening member 25 via the second shutter guide 19.
The shutter 8 is configured to open and close the opening holes 2v and 2w by moving the first shutter opening member 15 and the second shutter opening member 25. The suspension of the spring 11 and other positioning structures and the like have the same construction as in the first embodiment.

The operation of the disc cartridge constructed as described above will be described. First, the operation of mounting and positioning the disc cartridge in the recording / reproducing apparatus will be described.

The shutter 8 is provided with the opening holes 2v and 2w shown in FIG.
When the −y side of the disc cartridge in the closed state is grasped and inserted into the recording / reproducing apparatus from the + y side of the housing 2,
The end surface 15b of the first shutter opening member 15 comes into contact with the claw of the cartridge guide mechanism included in the recording / reproducing apparatus.
At the same time, the end surface 25 of the second shutter opening member 25
b comes into contact with the claw of the cartridge guide mechanism formed in the recording / reproducing apparatus. Further, when the cartridge is inserted in the + y direction, the first shutter opening member 15 and the second shutter opening member 25 are locked by the claws, and only the housing 2 moves in the + y direction. That is, the housing 2, the first shutter opening member 15, and the second shutter opening member 25 are moved relative to each other, and the first shutter opening member 15 and the second shutter opening member 15 are moved with respect to the housing 2. The shutter release member 25 of moves in the -y direction. Then, the shutter 8 starts moving in the −x direction via the first belt 21 and the first shutter guide 9. At the same time, the end portion of the shutter 8 moves in the −x direction via the second belt 22 and the second shutter guide 19. Then, the shutter 8 moves so as to completely open the opening holes 2v, 2w, and the spring 11 hooked on the first shutter guide 9 and the second shutter guide 19 is pulled in the −x direction. When the opening holes 2v, 2w are completely opened, the cartridge is chucked by the recording / reproducing device by the positioning recess 2d formed in the housing 2, and the opening holes 2v, 2w are opened as shown in FIG. The shutter 8 is opened.

Then, the cartridge is pulled into the inside of the apparatus by the recording / reproducing apparatus, the positioning hole 2n and the positioning pin or the like provided in the recording / reproducing apparatus are fitted, and the housing 2 is accurately positioned. Further, the turntable and the clamper of the recording / reproducing apparatus are inserted into the opening 2w, and the disc 1 is coaxially placed on the turntable.
Is fixed with a clamper. In addition, a total of four heads are inserted from each of the opening holes 2v and 2w, for example, two heads on each of the first surface side and the second surface side, respectively, so that the disk 1 can be recorded or reproduced. Become.

Next, the operation of ejecting the disc cartridge from the recording / reproducing apparatus will be described. First, the clamp of the disc 1 is released, and at the same time, the turntable and the clamper are ejected from the opening holes 2w, and further the heads are ejected from the opening holes 2v and 2w. Next, the fitting between the positioning hole 2f and the positioning pin or the like of the housing 2 is released. Then, the disc cartridge is ejected along the reverse path, and when the positioning recess 2d formed in the housing 2 is unchucked, the cartridge is moved in the -y direction by a spring or the like provided in the recording / reproducing apparatus. To do. In the course of the movement, the claw of the recording / reproducing apparatus causes the first shutter opening member 15 and the end surface 15 of the second shutter opening member 25.
When separated from b and 25b, the restoring force of the spring 11 causes the shutter 8 to be + so as to completely close the opening holes 2v and 2w.
The first shutter guide 9, the second shutter guide 19, the first belt 21, and the second shutter guide 9 move in the x direction.
The first shutter opening member 15 and the second shutter opening member 25 move in the -y direction relative to the housing 2 via the belt 22 of the.

Then, even if it is discharged from the recording / reproducing apparatus,
Since the shutter 8 is permanently pulled by the spring 11, the opening holes 2v and 2w are permanently closed. As described above, according to the present embodiment, both the first shutter guide 9 and the second shutter guide 19 are provided in the disc cartridge corresponding to the recording / reproducing apparatus in which a plurality of heads are provided on one side or both sides of the disc 1. Drive simultaneously,
By opening and closing the shutter 8 on both the first shutter guide 9 side and the second shutter guide 19 side, jerky operation due to friction between the shutter 8 and the housing 2 and the like is eliminated, and opening and closing of the shutter 8 is facilitated. By doing so, the opening holes 2v, 2w can be surely opened or closed.

By disposing the cover sheet 14 so as to cover the end portion of the shutter 8 and the second shutter guide 19 so as to cover the long hole portion 2i penetrating the housing 2, the cover sheet 14 can be removed from the long hole portion 2i. It is possible to suppress dust and dirt from entering and reduce adverse effects on the mechanism inside the disk cartridge.

Further, when the shutter 8 opens the opening holes 2v, 2w, the first shutter opening member 15 and the second shutter opening member 2 are inserted while the housing 2 is inserted into the recording / reproducing apparatus.
Since both ends of 5 are locked by the recording / reproducing device and the first shutter opening member 15 and the second shutter opening member 25 are moved simultaneously with respect to the housing 2, The reaction force is evenly generated, and the housing is prevented from being tilted and inserted, and smooth operation is possible.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 9 is an exploded perspective view of the entire disc cartridge, FIG. 10 is an enlarged view showing a part of FIG. 9, and FIG. 11 is a schematic diagram of the entire disc cartridge with the opening hole closed by the first shutter and the second shutter. FIG. 12 is a schematic perspective view of the entire disc cartridge in which the first shutter and the second shutter have the openings opened.

9 to 12, 1 is a disc,
2 is a housing, 2a is an upper half, 2b is a lower half, 2v, 2
w is an opening hole, 2n is a positioning hole, 2u is a positioning recess,
2d is a V-shaped positioning concave portion, 2e, 2f are cylindrical convex portions, 2h (shown in FIG. 3), 2k are rail-shaped convex portions, 2
i is an elongated hole portion, 2j and 2m are step portions, 19 is a second shutter guide, 15 is a shutter opening member, 21 is a first belt, 22 is a second belt, 12 is a pin, 13 is a pulley,
11 is a spring, the above is the same as the configuration of FIG. 1,
The description is omitted.

The feature of this embodiment lies in the configuration described below. 2q is a rail-shaped projection provided inside the + y-direction end of the housing 2 and into which a groove-shaped recess 9a of a first shutter guide 9 described later is fitted, and extends in the x-direction. The rail-shaped convex portion 2h shown in FIG. Reference numeral 2r is a step portion provided on the outer surface of the housing 2 at the end portion in the + y direction (FIG. 9), and a cover sheet 14 to be described later is attached to the step portion 2r.
It is symmetrical about the j and x axes. 2s is the step 2
It is set such that a convex portion 9b formed on a first shutter guide 9 described later penetrates through an elongated hole provided along r, and the first shutter guide 9 can be moved. It is symmetrical with respect to the long hole 2i with respect to the x-axis.

A shutter 8 is composed of two shutters 18 and 28, a first and a second. First shutter 18
Is a rectangular thin plate and extends in the y direction so as to cover the opening holes 2v and 2w formed in the upper half 2a. Further, the first shutter 18 is provided at both ends with holes 18a for fixing to a first shutter guide 9 and a second shutter guide 19 which will be described later. The holes 18 for fixing the first shutter guide 9 and the second shutter guide 19 are provided.
As shown in FIG. 4, the shape of a is conical so that the head of the countersunk screw 16 or the like does not protrude from the surface of the first shutter 18. The second shutter 28 also has a rectangular thin plate shape, and has an opening hole 2v formed in the lower half 2b,
It extends in the y direction so as to cover 2w. Further, the second shutter 28 has a first shutter guide 9, which will be described later, on both ends thereof.
A hole 28a for fixing the second shutter guide 19 is provided. The first shutter guide 9 and the second shutter guide 9
As shown in FIG. 4, the hole fixed to the shutter guide 19 is formed in a conical shape so that the head of the countersunk screw 16 or the like does not protrude from the surface of the second shutter 28.

Reference numeral 9 is a first shutter guide, which is symmetrical with the second shutter guide 19 with respect to the x-axis. First
The shutter guides 9 have convex portions 9b on both sides in the z direction of the rectangular parallelepiped.
Are formed. The convex portion 9b penetrates the elongated hole portion 2s formed in the housing 2 and is fixed to the holes 18a and 28a provided at the end portions of the first shutter 18 and the second shutter 28 with screws or the like. It Further, a groove-shaped concave portion 9a is formed, is fitted into the convex portion 2q formed on the housing 2, and is set to be slidable in the x direction. The shutter 8 serves as a guide when moving in the x direction with respect to the housing 2. Further, the first shutter guide 9 is formed with a hole 9c for catching a spring 11 described later. Also, the second
A hole (not shown) for fixing the belt 22 is formed.

Reference numeral 14 is a cover sheet for the first shutter 1
It is a rectangular thin plate-like member provided with two pieces so as to cover both end portions of 8 and two pieces so as to cover both end portions of the second shutter 28. + Y of the first shutter 18
Cover sheet 14 provided so as to cover the end in the direction
Is provided on the stepped portion 2r of the housing 2 so as to cover the screw and the like for fixing the hole 18a and the projection 9b formed on the first shutter guide 9 and the long hole 2s formed on the housing 2. It is attached by adhesion or the like so that it does not protrude from the surface of the housing 2. Further, the cover sheet 14 provided so as to cover the end portion of the first shutter 18 in the -y direction has a screw or the like for fixing the hole 18a and the protrusion 19b formed on the second shutter guide 19, and the like. It is attached to the step portion 2j of the housing 2 by adhesion or the like so as to cover the elongated hole portion 2i formed in the housing 2.
It does not protrude from the surface of the housing 2. Also,
The cover sheet 14 provided so as to cover the end portion of the second shutter 28 in the + y direction has a screw or the like for fixing the hole 28a and the protrusion 9b formed on the first shutter guide 9, and the housing 2 It is adhered to the stepped portion 2r of the housing 2 by adhesion or the like so as to cover the elongated hole portion 2s formed in the housing 2 and does not protrude from the surface of the housing 2. In addition, the second shutter 2
The cover sheet 14 provided so as to cover the end portion in the −y direction of 8 is formed on the housing 2 such as a screw that fixes the hole 28 a and the protrusion 19 b formed on the second shutter guide 19. The step portion 2 of the housing 2 so as to cover the elongated hole portion 2i
It is attached to j by adhesion or the like so that it does not protrude from the surface of the housing 2. The operation of the disk cartridge configured as described above is the same as that of the first embodiment, and therefore its explanation is omitted. It is to be noted that FIG. 11 shows the disc cartridge in which the shutter 8 closes the opening holes 2v, 2w. FIG. 12 shows the disk cartridge in which the shutter 8 opens the opening holes 2v and 2w.

As described above, according to this embodiment, the first shutter guide 9 and the second shutter guide 9 are provided in the disc cartridge corresponding to the recording / reproducing apparatus in which a plurality of heads are provided on one side or both sides of the disc 1. By simultaneously driving both of the shutters 19 and opening and closing the shutter 8 on both the first shutter guide 9 side and the second shutter guide 19 side, the jerky operation due to friction between the shutter 8 and the housing 2 is eliminated. The shutter 8 can be smoothly opened and closed, and the opening holes 2v, 2w can be surely opened or closed.

Further, by providing the first shutter 18 and the second shutter 28 and eliminating the process of bending the shutter 8, the assembly error due to the processing distortion is eliminated, and the first shutter 18 and the second shutter 28 are eliminated.
It becomes possible to assemble the shutter 18 and the second shutter 28 in parallel with each other with certainty, the gap between the shutter 8 and the housing 2 can be suppressed, and dust, dirt and the like enter the inside of the housing 2. Can be suppressed.

Further, the cover sheet 14 covers both ends of the shutter 8, and the first shutter guide 9 and the second shutter guide 9 are provided.
A long hole portion 2i through which the shutter guide 19 of the
By installing so as to cover 2s, the long hole 2
It is possible to further suppress dust and dirt entering from i and 2s, and to further reduce adverse effects on the mechanism inside the disc cartridge.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. 13 is an exploded perspective view of the entire disc cartridge, and FIG. 14 is an enlarged view showing a part of FIG. The present embodiment is characterized in that a second shutter opening member 25 is provided as compared with the third embodiment.

In FIGS. 13 and 14, 1 is a disk,
2 is a housing, 2a is an upper half, 2b is a lower half, 2v, 2
w is an opening hole, 2n is a positioning hole, 2u is a positioning recess,
2d is a V-shaped positioning recess, 2e, 2f are cylindrical protrusions, 2h (shown in FIG. 3), 2k, 2p are rail-shaped protrusions, 2i are elongated holes, 2j, 2m are stepped portions, Reference numeral 19 is a second shutter guide, 11 is a spring, 12 is a pin, 15 is a first shutter opening member, 25 is a second shutter opening member, 1
Reference numeral 3 is a pulley, 21 is a first belt, and 22 is a second belt. The above is the same as the configuration of FIG. 7, and the description thereof is omitted.

2q is a first shutter guide 9 which will be described later.
Is a rail-shaped projection into which the recess 9a is fitted, extends in the x direction, and is symmetrical with respect to the rail-shaped projection 2h shown in FIG.

Reference numeral 2r denotes a step portion to which a cover sheet 14 described later is attached, which is formed one step lower than the outer shape of the housing 2.
It is symmetrical with respect to the step 2j with respect to the x-axis. Reference numeral 2s denotes an elongated hole portion, which is set so that the convex portion 9b formed on the first shutter guide 9 described later penetrates and the first shutter guide 9 can be moved. It is symmetrical about the x-axis.

A shutter 8 is composed of a first shutter 18 and a second shutter. The first shutter 18 has a rectangular thin plate shape and extends in the y direction so as to cover the opening holes 2v and 2w formed in the upper half 2a. Further, the first shutter 18 is provided at both ends with holes 18a for fixing to a first shutter guide 9 and a second shutter guide 19 which will be described later. The shape of the holes fixed to the first shutter guide 9 and the second shutter guide 19 is such that the heads of the countersunk screws 16 and the like do not protrude from the surface of the first shutter 18, as shown in FIG. It has a conical shape.

The second shutter 28 is also a thin plate,
It extends in the y direction so as to cover the opening holes 2v, 2w formed in the lower half 2a. Further, the second shutter 28 is provided at both ends with holes 28a for fixing to a first shutter guide 9 and a second shutter guide 19 which will be described later. The shape of the holes fixed to the first shutter guide 9 and the second shutter guide 19 is such that the heads of the countersunk screws 16 and the like do not protrude from the surface of the second shutter 28 as shown in FIG. It has a conical shape.

Reference numeral 9 is a first shutter guide, which is symmetrical with the second shutter guide 19 with respect to the x-axis. First
The shutter guides 9 have convex portions 9b on both sides in the z direction of the rectangular parallelepiped.
Are formed. The convex portion 9b penetrates the elongated hole portion 2s formed in the housing 2 and is fixed to the holes 18a and 28a provided at the end portions of the first shutter 18 and the second shutter 28 with screws or the like. It Further, a groove-shaped concave portion 9a is formed, is fitted into the convex portion 2q formed on the housing 2, and is set to be slidable in the x direction. The shutter 8 serves as a guide when moving in the x direction with respect to the housing 2. Further, the first shutter guide 9 has a hole (not shown) for hooking a spring 11 described later. Further, a hole (not shown) for fixing the second belt 22 is formed.

Reference numeral 14 is a cover sheet for the first shutter 1
It is a rectangular thin plate-like member provided with two pieces so as to cover both end portions of 8 and two pieces so as to cover both end portions of the second shutter 28. + Y of the first shutter 18
Cover sheet 14 provided so as to cover the end in the direction
Is provided on the stepped portion 2r of the housing 2 so as to cover the screw and the like for fixing the hole 18a and the projection 9b formed on the first shutter guide 9 and the long hole 2s formed on the housing 2. It is attached by adhesion or the like so that it does not protrude from the surface of the housing 2. Further, the cover sheet 14 provided so as to cover the end portion of the first shutter 18 in the -y direction has a screw or the like for fixing the hole 18a and the protrusion 19b formed on the second shutter guide 19, and the like. It is attached to the step portion 2j of the housing 2 by adhesion or the like so as to cover the elongated hole portion 2i formed in the housing 2.
It does not protrude from the surface of the housing 2. Also,
The cover sheet 14 provided so as to cover the end portion of the second shutter 28 in the + y direction has a screw or the like for fixing the hole 28a and the protrusion 9b formed on the first shutter guide 9, and the housing 2 It is adhered to the stepped portion 2r of the housing 2 by adhesion or the like so as to cover the elongated hole portion 2s formed in the housing 2 and does not protrude from the surface of the housing 2. In addition, the second shutter 2
The cover sheet 14 provided so as to cover the end portion in the −y direction of 8 is formed on the housing 2 such as a screw that fixes the hole 28 a and the protrusion 19 b formed on the second shutter guide 19. The step portion 2 of the housing 2 so as to cover the elongated hole portion 2i
It is attached to j by adhesion or the like so that it does not protrude from the surface of the housing 2.

The operation of the disk cartridge constructed as described above is the same as that of the second embodiment, and therefore its explanation is omitted. It is to be noted that FIG. 11 shows the disc cartridge in which the shutter 8 closes the opening holes 2v, 2w. FIG. 1 shows the disc cartridge with the shutters 8 opening the opening holes 2v, 2w.
It is 2.

As described above, according to this embodiment, in the disc cartridge corresponding to the recording / reproducing apparatus in which a plurality of heads are provided on one side or both sides of the disc 1, the first shutter guide 9 and the second shutter guide are used. By driving both 19 simultaneously and opening and closing the shutter 8 on both the first shutter guide 9 side and the second shutter guide 19 side, a jerky operation due to friction between the shutter 8 and the housing 2 or the like can be performed. Therefore, the shutter 8 can be smoothly opened and closed, and the opening holes 2v and 2w can be surely opened or closed.

Further, by providing the first shutter 18 and the second shutter 28 and eliminating the process of bending the shutter 8, the assembly error due to the process distortion is eliminated, and the first shutter 18 is eliminated.
It becomes possible to assemble the shutter 18 and the second shutter 28 in parallel with each other with certainty, the gap between the shutter 8 and the housing 2 can be suppressed, and dust, dirt and the like enter the inside of the housing 2. Can be suppressed.

The cover sheet 14 covers both ends of the shutter 8, and the first shutter guide 9 and the second shutter guide 9 are provided.
A long hole portion 2i through which the shutter guide 19 of the
By installing so as to cover 2s, the long hole 2
It is possible to further suppress dust and dirt entering from i and 2s, and to further reduce adverse effects on the mechanism inside the disc cartridge.

In the first to fourth embodiments, the opening hole 2w allows the head to be inserted, and
Although a turntable or clamper can be inserted and the opening 2v can be inserted with a head,
The opening hole 2w may be made to allow only the insertion of the head, and the opening hole 2v may be made to allow the insertion of the head, the turntable or the clamper.

In addition, in the first to fourth embodiments, two opening holes 2v,
Although 2 w is provided, it may be provided with only one opening hole. For example, as shown in FIG. 15, one opening hole is included including the central portion of the disk 1 to accommodate a plurality of heads. It may be 2t. Also, as shown in FIG.
There may be one opening hole 2t including the central portion of the disc so that one head can be inserted.

Further, in the first to fourth embodiments, the type of the disc 1 is not limited, but any type may be used, for example, a phase change type optical disc, a magneto-optical disc, or the like. A replaceable magnetic disk may be used.

Further, in the first to fourth embodiments, the method of fixing the disc 1 to the turntable corresponds to a so-called mechanical clamp system, that is, the system of sandwiching and fixing the disc 1 between the turntable and the clamper. The opening 2w on the side of the upper half 2a of the housing 2 is configured so that the clamper can be inserted, but it may be configured to correspond to another fixing method. For example, a so-called magnet clamp system, that is, a magnet on a turntable. According to the method of fixing the magnet by adsorbing to the magnet and fixing the magnet, the position corresponding to the insertion of the clamper of the upper half, that is, the position corresponding to the vicinity of the center of the disc of the upper half may be covered. .

[0079]

As described above, according to the present invention, both the first shutter guide and the second shutter guide are provided in the disc cartridge corresponding to the recording / reproducing apparatus in which a plurality of heads are provided on one side or both sides of the disc. By simultaneously driving and opening and closing the shutter on both the first shutter guide side and the second shutter guide side, the jerking operation due to friction between the shutter and the housing is eliminated, and the shutter is opened and closed smoothly. Further, it is possible to realize an excellent disc cartridge in which the opening hole can be surely opened.

By providing the first shutter and the second shutter and eliminating the process of bending the shutter,
There is no assembly error due to processing distortion, the first shutter and the second shutter can be reliably assembled in parallel, the gap between the shutter and the housing can be suppressed, and dust, dust, etc. can be removed inside the housing. It is possible to realize a highly reliable disc cartridge which can suppress the entry into the disc and can reduce dust and the like attached to the disc.

Further, by disposing the cover sheet so as to cover the end portion of the shutter and cover the long hole portion which the first shutter guide and the second shutter guide penetrate through the housing, the long hole portion is formed. It is possible to realize a highly reliable disk cartridge that can further suppress dust and dirt that enters from the inside and can further reduce adverse effects on the mechanism inside the disk cartridge.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an entire disc cartridge according to a first embodiment of the present invention.

FIG. 2 is an enlarged view showing a part of FIG.

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

FIG. 4 is an enlarged sectional view showing a section of a part of the shutter.

FIG. 5 is a schematic perspective view of the entire disc cartridge with the shutter closing the opening hole in the first embodiment of the present invention.

FIG. 6 is a schematic perspective view of the entire disc cartridge with a shutter opening an opening hole according to the first embodiment of the present invention.

FIG. 7 is an exploded perspective view of the entire disc cartridge according to the second embodiment of the present invention.

FIG. 8 is an enlarged view showing a part of FIG.

FIG. 9 is an exploded perspective view of the entire disc cartridge according to the third embodiment of the present invention.

FIG. 10 is an enlarged view showing a part of FIG.

FIG. 11 is a schematic perspective view of the entire disc cartridge with the shutter closing the opening hole in the third embodiment of the present invention.

FIG. 12 is a schematic perspective view of the entire disc cartridge in a state where a shutter opens an opening hole in the third embodiment of the present invention.

FIG. 13 is an exploded perspective view of the entire disc cartridge according to the fourth embodiment of the present invention.

FIG. 14 is an enlarged view showing a part of FIG.

FIG. 15 is a perspective view showing deformation of the opening hole.

FIG. 16 is a perspective view showing deformation of an opening hole.

FIG. 17 is an exploded perspective view of the entire conventional disk cartridge.

FIG. 18 is a schematic perspective view of the entire disc cartridge with the shutter closing the opening hole in the conventional example.

FIG. 19 is a schematic perspective view of the entire disc cartridge with a shutter opening an opening hole in a conventional example.

[Explanation of symbols]

 1 Disc 2 Housing 2v, 2w Opening Hole 8 Shutter 9 First Shutter Guide 15 Shutter Release Member 19 Second Shutter Guide

Claims (5)

[Claims] 1. A casing having a disc accommodating concave portion for rotatably accommodating a disc therein, and a casing provided in the casing so that at least a head of a recording or reproducing apparatus can be inserted, and a center of the disc is sandwiched. At both sides, a shutter provided so as to cover the opening, a first shutter guide movably arranged in the housing to fix the shutter, and the first shutter. A shutter opening member that is connected to the guide and a second shutter guide that is movably disposed in the housing on the opposite side of the first shutter guide with the center of the disc interposed therebetween and that fixes the shutter. By connecting the second shutter guide and the shutter opening member and moving the shutter opening member, the shutter can open and close the opening hole. Disk cartridge, wherein the first shutter guide and the second shutter guide are moved so that 2. A casing having a disc accommodating recess therein for rotatably accommodating a disc, and a casing provided at the casing so that at least a head of a recording or reproducing apparatus can be inserted, and a center of the disc is sandwiched. At both sides, a shutter provided so as to cover the opening, a first shutter guide movably arranged in the housing to fix the shutter, and the first shutter. A first shutter opening member connected to the guide;
A second shutter guide that is movably disposed in the housing and is fixed to the shutter on the side opposite to the shutter guide with respect to the center of the disc; and a second shutter guide that is connected to the second shutter guide. A second shutter opening member, and by simultaneously moving the first shutter opening member and the second shutter opening member, the first shutter guide can be opened and closed by the shutter. And a disk cartridge characterized in that the second shutter guide is moved. 3. The aperture hole includes the center portion of the disc, and 1
3. The disk cartridge according to claim 1, wherein the disk cartridge is present. 4. The shutter comprises a first shutter for covering an opening hole provided on one surface side of the disc, and a second shutter for covering an opening hole provided on the other surface side of the disc. The disk cartridge according to claim 1, 2 or 3, characterized in that. 5. A cover sheet provided so as to cover the end portion of the shutter.
The disk cartridge according to any one of 3 and 4.