JP2003257149A - Disk cartridge and disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk cartridge with an excellent dustproof property. <P>SOLUTION: In addition to an optical disk 1 and a cartridge main body (an upper shell 2 and a lower shell 3) having an opening part 4, the disk cartridge 101 is provided with a second shutter member 8 movable between the closing position of closing the opening part 4 and the opening position of opening it, a first shutter member 7 having a shape capable of covering the peripheral end part of the second shutter member 8 at the closing position together with the outer vicinity area of the peripheral end, and a lock member 13 for fixing the second shutter member 8 at the closing position. By the first shutter member 7, the intrusion of dirt and dust, etc., from a gap between the second shutter member 8 and the lower shell 3 is prevented. Also, by the lock member 13, even when the first shutter member 7 is erroneously opened while handling the disk cartridge 101, since the second shutter 8 is fixed at the position of closing the opening part 4, the sticking of fingerprints on the surface of the optical disk 1 or the like is prevented. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly to a cartridge having excellent dustproof property and a disk device for recording and / or reproducing information by using the cartridge.

[0002]

2. Description of the Related Art Conventionally, as a disc-shaped recording medium, a disc cartridge accommodating, for example, a magneto-optical disc is known.

A conventional disk cartridge 200 will be described below with reference to FIGS. 13 and 14. 13 is a perspective view of the disc cartridge 200 seen from the upper shell 202 side, and FIG. 14 is a perspective view of the disc cartridge 200 seen from the lower shell 203 side.

As shown in FIGS. 13 and 14, a disc cartridge 200 includes a magneto-optical disc 201 formed in a disk shape having a central hole 201a, and a pair of an upper shell 202 and a lower shell 203 which are combined with each other. I have it. The magneto-optical disk 201 is housed in circular disk housings (not shown) formed inside the upper shell 202 and the lower shell 203, respectively.

The upper shell 202 and the lower shell 203 are
For example, it is formed of a thermoplastic synthetic resin material into a substantially box shape, and is formed so as to house the magneto-optical disk 201 inside. Then, openings 204, 205, and 206 are formed in the upper shell 202 and the lower shell 203 for recording / reproducing by the recording / reproducing apparatus. That is, as shown in FIG. 13, the upper shell 202 is provided with an opening 204 for allowing a magnetic head (not shown) to face the magneto-optical disk 201. Also, the lower shell 2
14, an opening 205 for allowing an optical pickup (not shown) to face the magneto-optical disc 201 and a turntable (not shown) of the disc drive mechanism are provided in the magneto-optical disc 201. An opening 206 is formed so as to enter the center hole 201a.

The disc cartridge 200 also includes
As shown in FIGS. 13 and 14, the openings 204, 20
A shutter member 207 for opening and closing 5.206 is provided so as to be movable in the arrow A and B directions. The shutter member 207 is provided in the opening 20 of the upper shell 202.
4, an upper shutter portion 208 that opens and closes 4, a lower shutter portion 209 that opens and closes the openings 205 and 206 of the lower shell 203, and a connecting portion 210 that connects one ends of the upper shutter portion 208 and the lower shutter portion 209. Have

When the disc cartridge 200 configured as described above is mounted in the recording / reproducing apparatus, the shutter member 207 is moved and operated by the shutter opening / closing operation member (not shown) of the recording / reproducing apparatus to open the opening 204.・ 205
・ 206 is opened. After that, in the disc cartridge 200, the turntable of the disc drive mechanism of the recording / reproducing apparatus enters through the driving opening 206 to rotate the magneto-optical disc 201, and the recording / reproducing openings 204 and 205 record data. The magnetic head and the optical pickup of the reproducing apparatus are respectively inserted to record / reproduce information on / from the magneto-optical disk 201.

[0008]

However, as shown in FIG.
As shown in (enlarged view of the principal part of the cross section taken along the line C-C in FIG. 13), in the conventional disc cartridge 200,
Upper shell 202 and lower shell 203 and shutter member 2
A gap d is provided between the shutter member 207 and the shutter member 07 so that the shutter member 207 can freely move.

Therefore, in the disc cartridge 200, the openings 204, 205, 206 are not sufficiently sealed. As a result, dust, dust, and the like entering through the gap d adheres to the surface of the magneto-optical disk 201, causing an error when recording / reproducing a signal on / from the magneto-optical disk 201.

Further, the above conventional disk cartridge 2
00, when the shutter member 207 is opened outside the recording / reproducing apparatus, dust or dirt enters the inside of the disc cartridge or the exposed magneto-optical disc 201.
There was a risk that a finger touched the recording / reproducing surface of and the fingerprint adhered to it.

As described above, the disk cartridge having the conventional structure has a structure in which foreign matter such as dust and dirt enters the inside,
There was incomplete protection against fingerprint sticking by touching the disk surface with a finger. Therefore, there is a problem that the surface of the disk is soiled and recording / reproducing cannot be performed well.

As a technique for solving the above-mentioned problems due to the gap d between the cartridge body and the shutter member, the published utility model publication “Saikaihei 4-111058” (published date: 1992) September 28) ",
Disc cartridges with a sealing mechanism have been proposed.

FIG. 16 is a schematic view showing a main part of the disk cartridge 200A described in the above publication, and corresponds to a sectional view taken along the line CC of FIG. The disc cartridge 200A has almost the same structure as the above-mentioned disc cartridge 200 except for the structure of the shutter member (FIGS. 13 and 14).

Like the disc cartridge 200, the disc cartridge 200A has recording and reproducing openings 204 and 205 for exposing a part of the magneto-optical disc 201 to the upper shell 202 and the lower shell 203.
Is provided. Then, the openings 204 and 205
A step portion 221 is provided on one end surface of the.

Further, the above-mentioned disc cartridge 200A
The outside of the cartridge body, the opening 204 · 205
A first shutter 217 having a substantially U-shaped cross section in the direction orthogonal to the line CC is provided in close proximity for opening and closing.
Further, on the disc side of the first shutter 217, the protrusion 2 is formed along the step 221 of the openings 204 and 205.
22 is formed. Further, the openings 204/205
The second shutter 223 has one end locked to the protruding portion 222 of the first shutter 217 and the other end locked to the end surfaces of the openings 204 and 205. The second shutter 223 can be folded in an accordion shape.

As described above, in the disk cartridge described in the above publication, the second shutter 223 strengthens the sealing of the openings 204 and 205, and prevents the entry of dust and dirt into the disk cartridge. Is possible.

However, regarding the second shutter 223, the folding pitch affects the thickness of the cartridge,
In addition, the thickness of the second shutter 223 has a thickness of the opening 204.2.
05 and the width in the moving direction of the shutter. Therefore, as the material of the second shutter 223, it is necessary to select a material that is as thin as possible, can be folded at a small pitch, and has a high movability in the folding operation. However, the material that can be used for the second shutter 223 is not exemplified in the above publication, and there is no suitable material at present.

The present invention has been made to solve the above problems, and its object is to provide a disk cartridge having excellent dustproof property, and a disk device for recording and / or reproducing information using the disk cartridge. To provide.

[0019]

In order to solve the above-mentioned problems, a disk cartridge of the present invention is for storing a disk as a recording medium and the above-mentioned disk and exposing a part of the disk to the outside. In a disc cartridge including a cartridge body having an opening, an inner shutter movable between a closed position that closes the opening and an open position that opens, and a peripheral end portion of the inner shutter in the closed position. It is characterized by further comprising an outer shutter having a shape capable of covering the outer peripheral area of the peripheral end together with the outer peripheral area, and a locking means for fixing the inner shutter to the closed position.

With the above structure, since the outer shutter covers the peripheral end portion of the inner shutter in the closed position for closing the opening together with the outer peripheral region of the peripheral end, a gap formed between the inner shutter and the cartridge body. It is possible to prevent dust and dirt from entering. Also, since the locking means fixes the inner shutter in the closed position that closes the opening, even if the outer shutter is accidentally opened during handling of the disk cartridge, the inner shutter closes the opening, It can prevent fingerprints from adhering to the surface.

Therefore, it is possible to realize a disc cartridge in which strict measures are taken against dust and dust entering the inside of the cartridge and fingerprints attached by touching the disc surface with a finger. Therefore, the possibility of the surface of the disc being contaminated is greatly reduced, and recording and reproduction of the disc can always be performed well.

In the disc cartridge, the inner shutter and the outer shutter may move linearly between the open position and the closed position, or may move on a curved line such as an arc. It may be. Further, it is more preferable that the outer shutter has a shape capable of covering not only the peripheral end portion of the inner shutter but also the entire plane of the inner shutter. Further, it is more preferable that the cartridge body is provided with concave portions in which the inner shutter and the outer shutter are movable between the open position and the closed position, and the inner shutter and the outer shutter are arranged in these concave portions, respectively.
Further, a hole, a groove, or the like, which is provided in the disc device for releasing the locking means, for guiding the rod-shaped or thin-plate shaped unlocking means to the locking means, may be formed in the cartridge body. Then, the hole or groove may be closed by a shutter (for example, an outer shutter) or the like except when the lock is released.

Further, in the disc cartridge of the present invention, the outer shutter is provided with a peripheral wall portion protruding toward the cartridge main body side along the peripheral end surface of the inner shutter in the closed position. I am trying.

With the above construction, when the inner shutter closes the opening, the peripheral wall portion protruding from the outer shutter toward the cartridge body is located along the peripheral end surface of the inner shutter.

Therefore, the distance between the outer shutter and the cartridge body outside the peripheral end surface of the inner shutter can be reduced. As a result, it is less likely that dust or dirt will enter the gap formed between the inner shutter and the cartridge body. Therefore, it is possible to more reliably prevent dust and dirt from entering the inside of the cartridge.

It is more preferable that the peripheral wall portion has a shape in which the width (thickness) of the end portion on the cartridge main body side is large or has a portion extending along the cartridge main body.

Further, the disk cartridge of the present invention is
A disc cartridge provided with a disc that is a recording medium and a cartridge body that accommodates the disc and has an opening for exposing a part of the disc to the outside, the disc cartridge being provided inside the cartridge body, An inner shutter that is movable between a closed position that closes the part and an open position that opens, and that is movable between a closed position that is provided outside the cartridge body and that closes the opening part and an open position that opens the part. The outer shutter and the locking means for fixing the inner shutter to the closed position are provided.

With the above structure, the lock means fixes the inner shutter in the closed position for closing the opening. Therefore, even if dust or dust adhered to the back surface of the outer shutter is dropped from the back surface of the outer shutter into the opening when the outer shutter is closed, it will fall onto the inner shutter that closes the opening. It never falls. Further, even if the outer shutter is accidentally opened during handling of the disc cartridge, the inner shutter closes the opening, so that fingerprints or the like can be prevented from adhering to the disc surface.

Therefore, it is possible to realize a disk cartridge in which measures are strictly taken against the intrusion of dust and dirt into the inside of the cartridge and the adhesion of fingerprints by touching the disk surface with a finger. Therefore, the possibility of the surface of the disc being contaminated is greatly reduced, and recording and reproduction of the disc can always be performed well.

In the disc cartridge, the inner shutter and the outer shutter may move linearly between the open position and the closed position, or may move on a curved line such as an arc. It may be. In addition, the cartridge body is provided with a concave portion in which the inner shutter and the outer shutter are movable between an open position and a closed position,
It is more preferable to dispose the inner shutter and the outer shutter in these recesses. Further, a hole, a groove, or the like, which is provided in the disc device for releasing the locking means, for guiding the rod-shaped or thin-plate shaped unlocking means to the locking means, may be formed in the cartridge body. Then, the hole or groove may be closed by a shutter (for example, an outer shutter) or the like except when the lock is released.

Further, the disc cartridge of the present invention is characterized by comprising a biasing means for biasing the inner shutter in the direction from the closed position to the open position.

With the above structure, since the inner shutter is further urged by the urging means, when the inner shutter is unlocked, the inner shutter is automatically moved from the closed position to the open position by the urging means. To do.

Therefore, when the disc cartridge is inserted into the disc device, the opening is automatically opened if the locking means is released after almost the entire disc cartridge has entered the disc device.

Therefore, outside the disk device,
The inner shutter is fixed to the closed position by the locking means to close the opening, while the locking means is released inside the disc device and the inner shutter is automatically moved to the open position by the biasing means to open the opening. It becomes possible to do.

Further, the disk cartridge of the present invention is characterized in that the urging means is a tension spring having both ends attached to the inner shutter and the outer shutter, respectively.

With the above structure, the inner shutter that closes the opening of the disc cartridge and the outer shutter that covers the inner shutter at the closed position are connected by a tension spring.

Therefore, since the double shutter is connected by the tension spring and the inner shutter is fixed by the lock means, even if the first shutter is accidentally opened, the outer shutter is closed by the urging force of the tension spring. Return to position.
Therefore, it is possible to prevent dust and dirt from entering the inside of the disc cartridge.

Further, the inner shutter utilizes the force stored by the extension of the tension spring when the outer shutter moves from the closed position to the open position, in the direction of approaching the outer shutter after unlocking (from the closed position to the open position). Direction). Therefore, no complicated mechanism is required to open the inner shutter.

When the disc cartridge is inserted into the disc device, the outer shutter is opened, and when the inner shutter is unlocked after almost the whole disc cartridge is inside the disc device, the inner shutter is closed. Moving to the open position, the opening is opened.
Therefore, it is possible to prevent the entry of dust and dirt into the inside of the cartridge outside the disk device, and to open the opening inside the disk device.

Further, the disc cartridge of the present invention comprises interlocking means for interlocking the movement of the outer shutter in the direction from the open position to the closed position with the movement of the inner shutter in the direction from the open position to the closed position. It is characterized by that.

With the above arrangement, when the outer shutter is further moved in the direction from the open position to the closed position, the interlocking means interlocks the inner shutter to move in the direction from the open position to the closed position. Therefore, if the interlocking means is provided, it is not necessary to use a complicated mechanism to close the inner shutter.

Further, the interlocking means is integrally formed with the shutter or a slider necessary for sliding the shutter as a portion which the inner and outer shutters abut to move in the closing direction in conjunction with each other. Can be configured to. In this case, the number of parts does not increase and the cost can be reduced.

Further, in the disc cartridge of the present invention, the cartridge body is provided with a release hole into which lock releasing means for releasing the fixing of the inner shutter at the closed position by the locking means can be inserted, and the outer side. It is characterized in that a release hole shutter portion for opening and closing the release hole is provided integrally with the outer shutter in accordance with the opening / closing operation of the opening portion by the shutter.

In the conventional disc cartridge such as MD, the release hole is not closed, and when the lock is released,
Since the shutter opens easily, dust intrusion and fingerprint attachment occur regardless of intentional or negligence.

In this respect, according to the above structure, when the opening is to be closed, the release hole for operating the lock release means is provided integrally with the outer shutter to perform the opening and closing operation together. Is blocked by.

Therefore, in order to open the opening from the state in which the outer and inner shutters are closed, the outer shutter is first opened to open the release hole shutter portion, and then the lock means is unlocked from the release hole. The inner shutter must be opened.

Therefore, outside the disk device,
Particularly, it is possible to more reliably prevent dust and dirt from entering the inside of the cartridge due to mistake. Further, this configuration is particularly effective for a disc cartridge that uses a disc having an improved recording density.

Further, the disk device of the present invention is a disk device for recording and / or reproducing in the above-mentioned disk cartridge, and unlocking means for unlocking the fixing of the inner shutter at the closed position by the locking means. It is characterized by having.

With the above construction, when the disc cartridge is inserted into the disc device, the lock means of the inner shutter is released by the lock releasing means after almost the whole of the disc cartridge is inside the disk device.
The opening can be opened. The lock releasing means may be a mechanical means such as a rod-shaped or thin plate-shaped member that acts on the lock means of the disc cartridge, or may be an electric means or the like.

Here, the disc cartridge is provided with at least an inner shutter, an outer shutter, and a locking means, and prevents dust and dust from entering the inside of the cartridge, and prevents fingerprints from being attached by touching the disc surface with a finger. Has been done.

Therefore, according to the above-mentioned disc device, the disc cartridge having the excellent dustproof property is mounted outside the disc device, the locking means is released inside the disc device to move the inner shutter to the open position, and the opening portion is opened. Can be opened. Therefore, it is possible to always perform good recording and reproduction of the disc.

[0052]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] The following will describe one embodiment of the present invention in reference to FIGS. 1 to 7.

A. Structure First, the structure of the disc cartridge 101 according to the present embodiment will be described with reference to FIGS. 1 to 5. Figure 1
Is the disk cartridge 101 viewed from the upper shell 2 side.
FIG. FIG. 2 shows a disk cartridge 1
It is a perspective view of the shutter 6 viewed from the inside of 01. 3 to 5 are perspective views showing an opening / closing procedure of the shutter 6 of the disc cartridge 101 as viewed from the lower shell 3 side.

As shown in FIG. 1, a disc cartridge 101 according to this embodiment is a set of a disc-shaped optical disc (disc) 1 having a central hole 1a and a cartridge body which is combined with each other to form a cartridge body. The upper shell 2 and the lower shell 3 are provided. The optical disk 1 is stored in the circular disk storage portions formed inside the upper shell 2 and the lower shell 3, respectively. In FIG. 1, the disc storage portion 3 of the lower shell 3 is shown.
Only a is shown.

The upper shell 2 and the lower shell 3 are formed of, for example, a thermoplastic synthetic resin material into a substantially box shape,
The optical disk 1 is formed so that it can be stored inside. Then, in the lower shell 3, an optical pickup (not shown) of the recording / reproducing apparatus faces the optical disk, and a turntable (not shown) of a disk drive mechanism of the recording / reproducing apparatus enters the center hole 1a of the optical disk 1. An opening 4 is formed to allow it.

Further, as shown in FIG. 3, the lower shell 3 is
Positioning holes 35 and 36 for positioning at a predetermined position in the cartridge mounting portion of the recording / reproducing apparatus are provided at the corners (bottom surface of the disc cartridge 101) opposite to the end where the opening 4 is provided. There is.

Further, as shown in FIGS. 1 and 3, the disc cartridge 101 is provided with a shutter 6 for opening and closing the opening 4 so as to be movable in the directions of arrows A and B.

Here, the shutter 6 is, as shown in FIGS. 1 and 2, a first shutter member (outer shutter).
A second shutter member (inner shutter) 8 is provided inside 7. Second shutter member 8 provided inside
Has an area slightly larger than the opening area of the opening 4, and is formed in a shape sufficient to close the opening 4.
In addition, the first shutter member 7 provided on the outer side is
The shutter member 8 has a slightly larger area and is formed in a shape that completely covers the second shutter member 8. That is, the first shutter member 7 has substantially the same shape as the second shutter member 8, and the second shutter member 8 has the same shape.
Has a shape capable of covering the outer peripheral region of the peripheral end thereof. As a result, when the shutter 6 is completely closed, the second shutter member 8 closes the opening 4 and at the same time the first shutter member 7 is positioned outside the second shutter member 8 The shutter member 8 is covered.

Here, as shown in FIG. 3, on the main surface of the lower shell 3, there is formed a substantially rectangular recess 37 in which the first shutter member 7 can be moved for moving the first shutter member 7. Are formed. The recess 37 is formed by the first shutter member 7
Has a slightly larger area than the moving area that moves when opening and closing the opening 4, and is formed deeper than the thickness of the first shutter member 7.

Furthermore, on the main surface of the lower shell 3, inside the recess 37, a second shutter member 8 for moving the second shutter member 8 is provided.
The substantially rectangular recess 38 in which the shutter member 8 is movable.
Are formed. The recess 38 has a slightly larger area than a moving region in which the second shutter member 8 moves when opening and closing the opening 4, and the second shutter member 8 also has a larger area.
Is formed deeper than the thickness of.

That is, the recess 37 for moving the shutter member.
The numeral 38 is formed so that the first shutter member 7 and the second shutter member 8 moving inside thereof do not interfere with each other.

As shown in FIGS. 1 and 2, the first
The shutter member 7 has a bent portion (interlocking means) 71 in which one end of a side surface thereof is bent inward, and the bent portion 71 is provided with a spring hooking hole 72. Also,
Inside the bent portion 71, a cushioning material 11 is fixed in order to reduce the impact caused by the contact with the contact portion (interlocking means) 83 of the second shutter member 8.

Similarly, the second shutter member 8 has a bent portion 81 in which one end of the side surface portion is bent inward, and the bent portion 81 is provided with a spring hook hole 82. Further, an abutting portion 83 bent inward is formed at the other end of the bent portion 81.

Then, as shown in FIG.
Both ends of a tension spring (biasing means) 12 are attached to the respective parts 2.82. The tension spring 12 biases the first shutter member 7 and the second shutter member 8 toward each other, and the cushioning material 11 fixed inside the bent portion 71 of the first shutter member 7, Second
The contact portion 83 of the shutter member 8 is in a contact state.

The second shutter member 8 has a hook portion 84 formed by bending on the bent portion 81 side on the main surface.

On the other hand, as shown in FIG. 1, the upper shell 2 is provided with a lock member (locking means) 13 rotatably around a fulcrum pin 21 provided on an end surface which is a movement axis of the shutter 6. It is provided. The lock member 13 has at one end an engaging portion 13a formed in a shape capable of engaging with the hook portion 84 of the second shutter member 8, and at the other end, the tip thereof is in contact with the upper shell 2. It has a spring portion 13 b configured to come into contact with the contact portion 22.

Then, the second shutter member 8 opens the opening 4
The hook portion 8 of the second shutter member 8 when the second shutter member 8 is closed.
4 is engaged with the engaging portion 13 a of the lock member 13. As a result, the second shutter member 8 is attached to the disc cartridge 1
01 movement is restricted.

Further, as shown in FIG. 4, the lower shell 3 is provided with a release hole 31 on the main surface. Then, as shown in FIG. 5, a lock release member (lock release means) 14 is inserted into the release hole 31, and the engaging portion 13a of the lock member 13 is moved to the upper shell 2 side against the resistance of the spring portion 13b. By pushing up, the engagement between the engagement portion 13a and the hook portion 84 of the second shutter 8 is released.

As shown in FIG. 3, when the first shutter member 7 is in the closed position, the release hole 31 is closed by the release hole shutter portion 7s formed on the main surface of the first shutter member 7. As described above, the first shutter member 7 and the release hole 31 are formed. This release hole shutter part 7s
Is integrally provided with the first shutter member 7, and therefore moves together with the movement of the first shutter member 7. Therefore, the release hole shutter portion 7 s has the release hole 3 according to the operation of opening and closing the opening 4 by the first shutter member 7.
Open and close 1.

Further, as shown in FIG. 1, the side surface of the first shutter member 7 is provided with a substantially rectangular hole 73. A protrusion 15a of the closer 15 described later is provided in this hole 73.
(FIG. 6) enters the first and second shutter members 7
・ 8 closing operation is performed. A relief 85 is provided on the side surface of the second shutter member 8 so as to avoid the rectangular hole 73 on the side surface of the first shutter member 7.

Further, the side surface of the disc cartridge 101 is provided with a groove 23 through which a shutter opening operation member 16a for opening a first shutter member 7, which will be described later, passes.

B. Operation Next, the operation of opening and closing the opening 4 of the disc cartridge 101 by the first shutter member 7 and the second shutter member 8 will be described. 6. FIG. 6 is an explanatory plan view showing the operation of inserting the disc cartridge 101 into the cartridge holder 16. FIG. 7 is an explanatory side view showing an operation in which the cartridge holder 16 into which the disc cartridge 101 is inserted is lowered toward the chassis 17.

(1) Opening Operation As shown in FIG. 3, in the closed state, the opening 4 of the disk cartridge 101 is closed by the first and second shutter members 7 and 8. That is, the hook portion 84 of the second shutter member 8 is the lock member 1 of the upper shell 2.
The second shutter member 8 closes the opening 4 by engaging with the engaging portion 13 a of No. 3. Along with this, the tension spring 1
The first shutter member 7 biased in the direction of arrow B by the biasing force of 2 covers the outside of the second shutter member 8 closing the opening 4.

As a result, in the closed state, the outer peripheral portion of the second shutter member 8 that closes the opening 4 is covered with the first shutter member 7 and is not exposed, so that the second shutter member 8 is closed. It is possible to prevent dust from entering the inside of the cartridge through the opening 4 from the gap of the outer peripheral portion of the cartridge.

The operation of opening the opening 4 when the disc cartridge 101 is mounted in the recording / reproducing apparatus having the cartridge holder 16 is as follows.

First, as shown in FIG. 6, the disc cartridge 101 is a cartridge holder 1 of the recording / reproducing apparatus.
6 is inserted. At this time, the cartridge holder 16
The protrusion 15a of the closer 15 fixed to the side surface of the first shutter member 7 engages with the rectangular hole 73 on the side surface of the first shutter member 7. The side surface of the second shutter member 8 has a relief 85.
Is provided, the protrusion 15a of the closer 15 does not come into contact with the second shutter member 8. Further, the shutter opening operation member 16 a provided on the cartridge holder 16 is provided in the groove 2 on the side surface of the disc cartridge 101.
3 is inserted and abutted on the first shutter member 7. Therefore, as the disc cartridge 101 is inserted into the cartridge holder 16, the first shutter member 7 moves in the direction of arrow A (FIG. 3) against the biasing force of the tension spring 12. At this time, the tension spring 12 is stretched and stores a force.

Next, after the disc cartridge 101 is completely inserted into the cartridge holder 16 while the first shutter member 7 is opened, the disc cartridge 101 is mounted at the cartridge mounting position of the recording / reproducing apparatus as shown in FIG. Then, the descending operation is started on the chassis 17 side of the recording / reproducing apparatus. At this time, the rod-shaped lock releasing member 14 provided on the chassis 17 of the recording / reproducing apparatus so as to be movable up and down by the spring 14a enters into the releasing hole 31 of the disc cartridge 101, and the engaging portion 13a of the lock member 13 is engaged with the upper shell. It is pushed up to the 2 side to release the engagement with the hook portion 84 of the second shutter member 8.

As a result, the second shutter member 8 moves to a position hidden inside the first shutter member 7 by the biasing force stored in the tension spring 12 when the second shutter member 8 is inserted into the cartridge holder 16, and the contact portion 83 abuts against the cushioning material 11 fixed to the bent portion 71 of the first shutter member 7 and stops, thereby opening the opening 4.

Then, after the opening 4 is completely opened,
The disc cartridge 101 is further lowered to the chassis 17 side, mounted in the cartridge mounting position of the recording / reproducing apparatus, and recording and / or reproducing on the optical disc 1 is performed.

(2) Closing Operation The operation of closing the opening 4 when the disc cartridge 101 is ejected from the recording / reproducing apparatus having the cartridge holder 16 is as follows.

First, when the recording / reproducing apparatus starts the ejecting operation, the disc cartridge 101 starts rising from the cartridge mounting position and returns to the insertion completion position in the cartridge holder 16.

Next, as the disc cartridge 101 is ejected from the insertion completion position of the cartridge holder 16, the cartridge is inserted into the rectangular hole 73 provided on the side surface of the first shutter member 7 of the disc cartridge 101. As the protrusion 15a of the closer 15 fixed to the side surface of the holder 16 is engaged, as the disc cartridge 101 is ejected from the cartridge holder 16, the first shutter member 7 causes the disc cartridge 1 to move.
It is closed relative to 01. At this time, since the contact portion 83 of the second shutter member 8 is in contact with the cushioning member 11 fixed to the bent portion 71 of the first shutter member 7, the first shutter member 7 is interlocked with the cushioning member 11. The second shutter member 8 is also closed.

Then, the disc cartridge 101 moves in the ejecting direction to completely close the first shutter member 7 and, at the same time, the hook portion 84 of the second shutter member 8.
Engages with the engaging portion 13a of the lock member 13 and the opening 4
Is blocked. After that, the disc cartridge 101
Are completely discharged from the cartridge holder 16.

As described above, the disk cartridge which can prevent foreign matter such as dust and dirt from entering the inside of the cartridge and the adhesion of fingerprints by touching the disk surface with a finger, and the shutter of the disk cartridge can be opened and closed with a simple structure. It is possible to provide an optical disk device capable of performing the operations.

[Second Embodiment] The following will describe another embodiment of the present invention in reference to FIG. For convenience of explanation, members having the same functions as those shown in the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted.

Cartridge holder 1 according to the present embodiment
6A is similar to the cartridge holder 16 described above, the closer 15 having the protrusion 15a is fixed to the side surface,
Further, a shutter opening operation member 16a is provided, and further, a lock releasing member (lock releasing means) 16b.
Is provided.

The lock releasing member 16b is provided on the lower side of the side surface of the cartridge holder 16A in the disc cartridge inserting direction. Also, the unlocking member 1
6b is formed in a shape that is longer inward than the shutter opening operation member 16a so that it can contact the lock member 13.

Next, the operation of opening and closing the opening 4 by the first shutter member 7 and the second shutter member 8 when the disk cartridge 101 is attached to and detached from the cartridge holder 16A will be described.

(1) Opening Operation As shown in FIG. 3, in the closed state, the opening 4 of the disk cartridge 101 is closed by the first and second shutter members 7 and 8. That is, the hook portion 84 of the second shutter member 8 is the lock member 1 of the upper shell 2.
The second shutter member 8 closes the opening 4 by engaging with the engaging portion 13 a of No. 3. Along with this, the tension spring 1
The first shutter member 7 biased in the direction of arrow B by the biasing force of 2 covers the outside of the second shutter member 8 closing the opening 4.

The operation of opening the opening 4 when the disc cartridge 101 is mounted in the recording / reproducing apparatus having the cartridge holder 16A is as follows.

When the disc cartridge 101 is inserted into the cartridge holder 16A of the recording / reproducing apparatus, first, the disc cartridge 101 is provided with the protrusion 15 of the closer 15 fixed to the side surface of the cartridge holder 16A.
a engages with the rectangular hole 73 on the side surface of the first shutter member 7. Since the escape 85 is provided on the side surface of the second shutter member 8, the protrusion 15 of the closer 15 is provided.
The a does not contact the second shutter member 8. Further, the shutter opening operation member 16 a provided on the cartridge holder 16 A is fitted into the groove 23 of the side surface portion of the disc cartridge 101 and abuts on the first shutter member 7. Therefore, as the disc cartridge 101 is inserted into the cartridge holder 16A, the first shutter member 7 moves in the direction of arrow A (FIG. 3) against the biasing force of the tension spring 12. At this time, the tension spring 12 is stretched and stores a force.

Next, while the first shutter member 7 is opened, the disc cartridge 101 is moved to the cartridge holder 1
Before the operation of inserting into the 6A is completed, the lock releasing member 16b provided in the cartridge holder 16A is fitted into the groove 23 of the side surface portion of the disc cartridge 101 and is fixed to the upper shell 2 by the engaging portion of the lock member 13. 13a is pushed up to the upper shell 2 side to release the engagement with the hook portion 84 of the second shutter member 8.

As a result, the second shutter member 8 moves to a position hidden inside the first shutter member 7 by the urging force stored in the tension spring 12 when it is inserted into the cartridge holder 16, and the contact portion 83 abuts against the cushioning material 11 fixed to the bent portion 71 of the first shutter member 7 and stops, thereby opening the opening 4.

When the disk cartridge 101 is further moved to the inner side of the cartridge holder 16A, the first and second shutter members 7 and 8 are interlocked and moved in the direction of arrow A in FIG. After the disc is completely opened, the disc cartridge 101 descends to the chassis 17 side and is mounted at the cartridge mounting position of the recording / reproducing apparatus to record and / or reproduce on the optical disc 1.

(2) Closing Operation The operation of closing the opening 4 when ejecting the disc cartridge 101 from the recording / reproducing apparatus provided with the cartridge holder 16A is the same as when ejecting from the cartridge holder 16 described in the first embodiment. The operation is similar.

As described above, it is possible to open and close the shutter of the disk cartridge with a simple structure, which can prevent foreign matter such as dust and dirt from entering the inside of the cartridge and adhesion of fingerprints by touching the disk surface with a finger. A device can be provided.

[Third Embodiment] The following description will explain still another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those shown in the first and second embodiments will be designated by the same reference numerals, and the description thereof will be omitted.

Cartridge holder 1 according to the present embodiment
Similar to the cartridge holder 16 described above, 6B is provided with a closer 15 having a protrusion 15a fixed to the side surface thereof, and is further provided with a shutter release operation member (lock release means) 16c for both lock release and lock release.

The unlocking / shutter opening operation member 16c is provided on the back side of the side surface of the cartridge holder 16B in the disc cartridge insertion direction. Also,
The unlock / shutter opening operation member 16c is formed in a substantially L-shape with its tip protruding toward the insertion opening side of the cartridge holder 16B.

Next, the operation of opening and closing the opening 4 by the first shutter member 7 and the second shutter member 8 when the disc cartridge 101 is attached to and detached from the cartridge holder 16B will be described.

(1) Opening Operation As shown in FIG. 3, in the closed state, the opening 4 of the disk cartridge 101 is closed by the first and second shutter members 7 and 8. That is, the hook portion 84 of the second shutter member 8 is the lock member 1 of the upper shell 2.
The second shutter member 8 closes the opening 4 by engaging with the engaging portion 13 a of No. 3. Along with this, the tension spring 1
The first shutter member 7 biased in the direction of arrow B by the biasing force of 2 covers the outside of the second shutter member 8 closing the opening 4.

The operation of opening the opening 4 when the disc cartridge 101 is mounted in the recording / reproducing apparatus having the cartridge holder 16B is as follows.

When the disc cartridge 101 is inserted into the cartridge holder 16B of the recording / reproducing apparatus, first, the disc cartridge 101 is provided with the protrusion 15 of the closer 15 fixed to the side surface of the cartridge holder 16B.
a engages with the rectangular hole 73 on the side surface of the first shutter member 7. Since the escape 85 is provided on the side surface of the second shutter member 8, the protrusion 15 of the closer 15 is provided.
The a does not contact the second shutter member 8.

Further, the lock release / shutter release operation member 16c provided on the cartridge holder 16B is fitted into the groove 23 of the side surface portion of the disc cartridge 101, and first, the tip portion of the lock release / shutter release operation member 16c is the upper shell. Engagement portion 1 of lock member 13 fixed to 2
3a is pushed up to the upper shell 2 side to release the engagement with the hook portion 84 of the second shutter member 8. Subsequently, the unlock / shutter opening operation member 16c contacts the first shutter member 7. Therefore, as the disc cartridge 101 is inserted into the cartridge holder 16B, the first shutter member 7 moves in the direction of arrow A (FIG. 3). At this time, since the second shutter member 8 is connected to the first shutter member 7 by the tension spring 12,
The shutter member 7 moves in conjunction with the shutter member 7.

When the disc cartridge 101 is further moved to the inner side of the cartridge holder 16B, the first and second shutter members 7 and 8 are interlocked and moved in the direction of arrow A in FIG. After the disc is completely opened, the disc cartridge 101 descends to the chassis 17 side and is mounted at the cartridge mounting position of the recording / reproducing apparatus to record and / or reproduce on the optical disc 1.

(2) Closing Operation The operation of closing the opening 4 when the disc cartridge 101 is ejected from the recording / reproducing apparatus having the cartridge holder 16B is the same as the operation of ejecting from the cartridge holder 16 described in the first embodiment. The operation is similar.

As described above, it is possible to open and close the shutter of the disk cartridge with a simple structure, which can prevent foreign matter such as dust and dirt from entering the inside of the cartridge and adhesion of fingerprints by touching the disk surface with a finger. A device can be provided.

[Fourth Embodiment] The following description will explain still another embodiment of the present invention with reference to FIG. For convenience of explanation, the first embodiment
The members having the same functions as the members shown in 3 to 3 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 10 is a schematic diagram showing a main part of the disc cartridge 101A according to the present embodiment, and corresponds to a sectional view taken along the line CC of FIG. The disc cartridge 101A is the same except for the shutter structure.
It has the same structure as the disk cartridge 101 described above.

The disc cartridge 101A is different from the disc cartridge 101 in that
In this configuration, the first shutter member (outer shutter) 7A is provided instead of the shutter member 7.

The first shutter member 7A is different from the first shutter member 7 in that it has a peripheral wall portion 7Aa formed by bending a front end portion and a side end portion in the opening movement direction. The height of the peripheral wall portion 7Aa, that is, the height of the end surface of the first shutter member 7A is substantially the same as that of the second shutter member 8.

As a result, in the closed state of the opening 4 in which the first and second shutter members 7A and 8 are closed,
The second shutter member 8 is housed in the space formed by the recess 38 of the lower shell 3 and the first shutter member 7A. At this time, in particular, the front end portion and the side end portion in the opening movement direction of the first shutter member 7A are closed by the peripheral wall portion 7Aa. Therefore, it is possible to more reliably prevent the entry of dust and dirt from the gap d between the lower shell 3 and the second shutter 8.

As described above, it is possible to prevent foreign matter such as dust and dirt from entering the inside of the cartridge and to prevent the fingerprints from adhering to the surface of the disc with a finger, and to open and close the shutter of the disc cartridge when the disc cartridge is attached to or detached from the disc device. It is possible to provide a disk cartridge capable of performing a simple structure.

[Fifth Embodiment] The following description will explain still another embodiment of the present invention with reference to FIG. For convenience of explanation, the first embodiment
The members having the same functions as the members shown in 4 to 4 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 11 is a schematic view showing a main part of the disc cartridge 101B according to this embodiment, which corresponds to a sectional view taken along the line CC of FIG. The disc cartridge 101B has the same structure as the disc cartridge 101 described above, except for the structure of the shutter and the recess for moving the shutter.

As shown in FIG. 11, in the disk cartridge 101B, the first shutter member 7B is movable on the outer surface of the main surface of the lower shell 3 for moving the first shutter member (outer shutter) 7B. A substantially rectangular recess 37B
Are formed. The recess 37B has a slightly larger area than the moving region in which the first shutter member 7B moves when opening and closing the opening 4, and is formed deeper than the thickness of the first shutter member 7B.

On the inner surface of the main surface of the lower shell 3, a second shutter member (inner shutter) 8B is provided for moving.
The substantially rectangular recess 3 in which the shutter member 8B is movable
8B is formed. The recess 38B has a slightly larger area than the moving region in which the second shutter member 8B moves when opening and closing the opening 4, and is formed deeper than the thickness of the second shutter member 8B.

Then, as described in the first embodiment, the first and second shutter members 7B and 8B are attached to the recesses 37B and 38B so as to be movable in the directions A and B of FIG. There is.

As a result, the second shutter 8B is provided inside the cartridge main body, and the second shutter 8B closes the opening 4 in cooperation with the first shutter 7B. Therefore, when the first shutter 7B is opened, dust or dust on the surface of the lower shell 3 adheres to the back surface of the first shutter 7B, and when the first shutter 7B is closed, Even if it falls from the back surface to the opening 4, it falls onto the second shutter 8B, so that it can be prevented from falling onto the optical disc 1.

In the disc cartridge 101B, it is not necessary for the outer first shutter member 7B to cover the end portion of the second shutter member 8B. Therefore, the outer first shutter member 7B is used for the second shutter member 8B. It may not have a slightly larger area than the member 8B.

As described above, it is possible to prevent foreign matter such as dust and dirt from entering the inside of the cartridge and to prevent fingerprints from adhering to the surface of the disk with a finger, and to open and close the shutter of the disk cartridge when attaching / removing to / from the optical disk device. It is possible to provide a disk cartridge capable of performing a simple structure.

[Sixth Embodiment] The following will describe still another embodiment of the present invention in reference to FIG. For convenience of explanation, the first embodiment
The members having the same functions as the members shown in 5 to 5 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 12 is a plan view showing the disc cartridge 101C according to this embodiment. The disc cartridge 101C basically has the same structure as the above-described disc cartridge 101 in which the shutter is opened and closed by a parallel movement except that the shutter is opened and closed by a rotational movement.

As shown in FIG. 12, the disc cartridge 101C includes a first shutter member (outer shutter) 7
C and the second shutter member (inner shutter) 8C,
The fulcrum 61 is attached so as to be rotatable in the arrow E and F directions around the pivot point. And the first and second
The shutter members 7C and 8C are freely movable between a position where the opening 4 is opened and a position where the opening 4 is closed.

Here, the first and second shutter members 7C of the cartridge body of the disc cartridge 101C.
The end portion where 8C slides is formed in an arc shape. A groove (corresponding to the groove 23 in FIG. 3) is formed at this arcuate end, and a lock member 13 is provided.

Further, the first and second shutter members 7C
When the 8C is completely closed, the second shutter member 8C closes the opening 4 and at the same time, the first shutter member 7C is located outside the second shutter member 8C. It is formed so as to cover 8C.

Further, the two shutter member moving concave portions are formed so that the first shutter member 7C and the second shutter member 8C moving inside thereof do not interfere with each other.

Therefore, the operation of the shutter 6C in the disc cartridge 101C is performed by the disc cartridge 1
The same as 01. That is, the second shutter member 8C
Is closing the opening 4, the second shutter member 8C
The hook portion 84 is engaged with the engaging portion 13 a of the lock member 13. Therefore, the movement of the second shutter member 8C on the disc cartridge 101C is restricted.

Further, when the engagement portion 13a of the lock member 13 is pushed up to the upper shell 2 side by the lock release member 14 (FIG. 5), the engagement with the hook portion 84 of the second shutter member 8C is released. To be done. Then, the second shutter member 8C is caused by the biasing force stored in the tension spring 12 when the second shutter member 7C is inserted into the cartridge holder.
The cushioning member 1 moved to a position hidden inside C and having the contact portion 83 fixed to the bent portion 71 of the first shutter member 7C.
1 and stops, and the opening 4 is opened.

As described above, it is possible to prevent foreign matter such as dust and dirt from entering the inside of the cartridge and to prevent fingerprints from adhering to the surface of the disc with a finger, and to open and close the shutter of the disc cartridge when attaching or detaching to the optical disc device. It is possible to provide a disk cartridge capable of performing a simple structure.

The present invention is not limited to the above-described embodiments, but various modifications can be made within the scope of the claims, and the technical means disclosed in the different embodiments can be applied. Embodiments obtained by appropriately combining them are also included in the technical scope of the present invention.

For example, the first and second shutter members 7
The structure in which the abutting portions of 8 (the bent portion 71 of the first shutter member 7 and the abutting portion 83 of the second shutter member 8) are both provided by bending has been described. , Two slide members that are movably engaged with the slide grooves are provided, the first shutter 7 and the second shutter member 8 are fixed to the respective slide members, and the shutters are formed by bringing these slide members into contact with each other. It is also possible to interlock the movement of the member in the closing direction.

Further, the structure in which the first shutter member 7 is not provided with the lock mechanism for the disc cartridge 101 has been described, but like the second shutter member 8, the first shutter member 7 is provided with the lock mechanism and is locked. It is also possible to adopt a structure in which the release member is used for releasing.

Further, the disk cartridge 101 having the opening 4 only in the lower shell 3 has been described. However, a disk cartridge of a magneto-optical disk having an opening in the upper shell 2 to face the magnetic head, and double-sided recording / reproducing. It is needless to say that the present invention is applicable to the upper shell 2 as well as a disk cartridge having an opening to cope with the above.

[0135]

As described above, the disc cartridge of the present invention comprises a disc which is a recording medium, and a cartridge body which houses the disc and has an opening for exposing a part of the disc to the outside. In a disk cartridge provided, an inner shutter that is movable between a closed position that closes the opening and an open position that opens, and a peripheral end portion of the inner shutter that is in the closed position is a region near an outer side of the peripheral end. In addition, an outer shutter having a shape capable of covering and a lock means for fixing the inner shutter to the closed position are provided.

Therefore, since the outer shutter covers the peripheral end portion of the inner shutter in the closed position for closing the opening together with the area near the outer periphery of the peripheral end, dust from the gap formed between the inner shutter and the cartridge body. It is possible to prevent dust and the like from entering. Also, since the locking means fixes the inner shutter in the closed position that closes the opening, even if the outer shutter is accidentally opened during handling of the disk cartridge, the inner shutter closes the opening, It can prevent fingerprints from adhering to the surface.

Therefore, there is an effect that it is possible to realize a disc cartridge in which measures are strictly taken to prevent dust and dirt from entering the inside of the cartridge and adhesion of fingerprints by touching the disc surface with a finger. Therefore,
Since the possibility of the surface of the disc being contaminated is greatly reduced, there is an effect that recording and reproduction of the disc can always be performed well.

Further, in the disc cartridge of the present invention, the outer shutter is provided with a peripheral wall portion protruding toward the cartridge main body along the peripheral end surface of the inner shutter in the closed position. .

Therefore, it is possible to further reduce the distance between the outer shutter and the cartridge body outside the peripheral end surface of the inner shutter. As a result, it is less likely that dust or dirt will enter the gap formed between the inner shutter and the cartridge body. Therefore, there is an effect that it becomes possible to more reliably prevent dust and dirt from entering the inside of the cartridge.

The disc cartridge of the present invention is
A disc cartridge provided with a disc that is a recording medium and a cartridge body that accommodates the disc and has an opening for exposing a part of the disc to the outside, the disc cartridge being provided inside the cartridge body and having the opening. An inner shutter that is movable between a closed position that closes the part and an open position that opens, and that is movable between a closed position that is provided outside the cartridge body and that closes the opening part and an open position that opens the part. The outer shutter and the locking means for fixing the inner shutter to the closed position are provided.

Therefore, the locking means fixes the inner shutter in the closed position that closes the opening. Therefore, even if dust or dust adhered to the back surface of the outer shutter is dropped from the back surface of the outer shutter into the opening when the outer shutter is closed, it will fall onto the inner shutter that closes the opening. It never falls. Further, even if the outer shutter is accidentally opened during handling of the disc cartridge, the inner shutter closes the opening, so that fingerprints or the like can be prevented from adhering to the disc surface.

Therefore, there is an effect that it is possible to realize a disc cartridge in which measures are strictly taken to prevent dust and dirt from entering the inside of the cartridge and adhesion of fingerprints by touching the disc surface with a finger. Therefore,
Since the possibility of the surface of the disc being contaminated is greatly reduced, there is an effect that recording and reproduction of the disc can always be performed well.

Further, the disc cartridge of the present invention is provided with a biasing means for biasing the inner shutter in the direction from the closed position to the open position.

Therefore, further, outside the disk device, the inner shutter is fixed to the closed position by the locking means to close the opening portion, while inside the disk device, the locking means is released to urge the inner shutter by the urging means. It is possible to automatically move to the open position and open the opening.

Further, in the disk cartridge of the present invention, the urging means is a tension spring having both ends attached to the inner shutter and the outer shutter, respectively.

Therefore, since the double shutter is connected by the tension spring and the inner shutter is fixed by the lock means, even if the first shutter is accidentally opened, the outer shutter is provided with the tension spring. It returns to the closed position due to power. Therefore, there is an effect that it is possible to prevent dust and dirt from entering the inside of the disc cartridge.

Further, the inner shutter utilizes the force accumulated by the extension of the tension spring when the outer shutter moves from the closed position to the open position, in the direction of approaching the outer shutter after unlocking (from the closed position to the open position). Direction). Therefore, there is an effect that a complicated mechanism for opening the inner shutter is not required.

Further, when the disc cartridge is inserted into the disc device, the outer shutter is opened, and when the inner shutter is unlocked after almost the whole disc cartridge has entered the disc device, the inner shutter is released from the closed position. Moving to the open position, the opening is opened.
Therefore, there is an effect that the opening can be opened inside the disk device while preventing dust and dust from entering the inside of the cartridge outside the disk device.

Further, the disc cartridge of the present invention comprises interlocking means for interlocking the movement of the outer shutter in the direction from the open position to the closed position with the movement of the inner shutter in the direction from the open position to the closed position. It is a composition.

Therefore, when the outer shutter is further moved in the direction from the open position to the closed position, the interlocking means interlocks the inner shutter to move in the direction from the open position to the closed position. Therefore, it is not necessary to use a complicated mechanism to close the inner shutter.

Further, in the disc cartridge of the present invention, the cartridge body is provided with a release hole into which the lock release means for releasing the fixation of the inner shutter by the lock means at the closed position can be inserted, and the outer side. A release hole shutter portion that opens and closes the release hole is provided integrally with the outer shutter in accordance with the opening / closing operation of the opening portion by the shutter.

Therefore, to further open the opening from the closed state of the outer and inner shutters, first open the outer shutter to open the release hole shutter portion.
Then, after unlocking the locking means from the unlocking hole, the inner shutter must be opened.

Therefore, outside the disk device,
In particular, it is possible to more reliably prevent dust and dirt from entering the inside of the cartridge due to an accident. Also,
This structure is particularly effective for a cartridge that uses a disk having an improved recording density.

Further, the disk device of the present invention is a disk device for recording and / or reproducing in the above-mentioned disk cartridge, and unlocking means for releasing the fixing of the inner shutter at the closed position by the locking means. It is a configuration provided with.

Therefore, according to the above-mentioned disc device, a disc cartridge having an excellent dustproof property is mounted outside the disc device, the locking means is released inside the disc device, and the inner shutter is moved to the open position.
The opening can be opened. Therefore, there is an effect that recording and reproduction of the disk can always be performed favorably.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a schematic configuration of a disc cartridge according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an outline of a configuration of a shutter provided in the disc cartridge shown in FIG.

FIG. 3 is a perspective view showing the disc cartridge shown in FIG. 1, showing a closed state of a shutter.

4 is a perspective view showing the disc cartridge shown in FIG. 1, showing a state in which a first shutter member is open and a second shutter member is closed.

5 is a perspective view showing the disc cartridge shown in FIG. 1, showing an opened state of a shutter.

6 is a plan view showing a cartridge holder of a recording / reproducing apparatus into which the disc cartridge shown in FIG. 1 is inserted.

FIG. 7 is an explanatory diagram showing an operation in which the cartridge holder shown in FIG. 6 descends to the chassis side of the recording / reproducing apparatus.

FIG. 8 is a perspective view showing a schematic configuration of a cartridge holder according to another embodiment of the present invention.

FIG. 9 is a perspective view showing a schematic configuration of a cartridge holder according to still another embodiment of the present invention.

FIG. 10 is an enlarged view of a main part of a cross section of a disk cartridge according to another embodiment of the present invention.

FIG. 11 is an enlarged view of an essential part of a cross section of a disk cartridge according to still another embodiment of the present invention.

FIG. 12 is a plan view showing the outline of the configuration of a disk cartridge according to still another embodiment of the present invention.

FIG. 13 is a perspective view seen from the upper shell side of a conventional disk cartridge.

14 is a perspective view of the disk cartridge shown in FIG. 13 viewed from the lower shell side.

FIG. 15 is a C- of the disc cartridge shown in FIG.
It is a principal part enlarged view of the cross section in a C line.

FIG. 16 is an enlarged view of an essential part of a cross section of a disk cartridge according to another conventional technique.

[Explanation of symbols]

1 Optical Disc (Disk) 2 Upper Shell (Cartridge Body) 3 Lower Shell (Cartridge Body) 4 Openings 7, 7A, 7B, 7C First Shutter Member (Outer Shutter) 7Aa Circumferential Wall 7s Release Hole Shutter Sections 8, 8B, 8C Second shutter member (inner shutter) 12 Tension spring (biasing means) 13 Lock member (locking means) 14 Lock releasing member (lock releasing means) 16b Lock releasing member (lock releasing means) 16c Lock releasing / shutter opening operation Member (lock releasing means) 31 Release hole 71 Bending portion (interlocking means) 83 Abutting portion (interlocking means) 101, 101A, 101B, 101C Disk cartridge

Continued front page    (72) Inventor ▲ Yoshi ▼ Mitsunobu Tada             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company

Claims (8)

[Claims] 1. A disc cartridge comprising a disc, which is a recording medium, and a cartridge body, which houses the disc and has an opening for exposing a part of the disc to the outside, wherein the opening is closed. An inner shutter movable between a closed position and an opened open position; an outer shutter having a shape capable of covering a peripheral end portion of the inner shutter in the closed position together with a region near an outer periphery of the peripheral end; A disk cartridge comprising: locking means for fixing the inner shutter to the closed position. 2. The outer shutter is provided with a peripheral wall portion protruding toward the cartridge main body side along the peripheral end surface of the inner shutter in the closed position. Disc cartridge. 3. A disc cartridge comprising a disc, which is a recording medium, and a cartridge body having the disc for accommodating the disc and exposing a part of the disc to the outside. An inner shutter that is provided and is movable between a closed position that closes the opening and an open position that opens, and a closed position that is provided outside the cartridge body and that closes the opening and an open position that opens. A disk cartridge comprising: an outer shutter that can move between the outer shutter and locking means that fixes the inner shutter to the closed position. 4. The disk cartridge according to claim 1, further comprising a biasing unit that biases the inner shutter in a direction from a closed position to an open position. 5. The disk cartridge according to claim 4, wherein the urging means is a tension spring having both ends attached to the inner shutter and the outer shutter, respectively. 6. An interlocking device for interlocking the movement of the outer shutter in the direction from the open position to the closed position with the movement of the inner shutter in the direction from the open position to the closed position. 6. The disc cartridge according to any one of 1 to 5. 7. The cartridge body is provided with a release hole into which lock releasing means for releasing the fixing of the inner shutter at the closed position by the locking means can be inserted, and the opening and closing of the opening portion by the outer shutter. 7. The disc cartridge according to claim 1, wherein a release hole shutter portion that opens and closes the release hole is provided integrally with the outer shutter according to the operation. 8. A disk device for recording and / or reproducing on the disk cartridge according to claim 1, wherein the locking means releases the fixation of the inner shutter in the closed position. A disk device, comprising: a lock releasing unit for locking.