JPH05189912A - Disk cartridge and device therefor - Google Patents

Abstract

PURPOSE:To easily load plural disks by loading disks by expanding plural disk housing parts laminated on an electrical turning shaft in a sector shape. CONSTITUTION:The plural disk housing parts 2A-2C are laminated on a disk cartridge 1. Disk placing parts 4A-4C are provided on the disk housing parts 2A-2C, respectively, and the housing parts 2A-2C are turned via the motor driving turning shaft 7, and are expanded in sector shape, then, the disks on the placing part 4A-4C can be loaded. In such constitution, the plural disks can be housed simultaneously, thereby, the disk cartridge capable of easily loading the plural disks can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge suitable for continuously reproducing an LD (laser disc) having the same size as a CD (compact disc), and a driving device for the disc cartridge.

That is, the present invention relates to a disc cartridge and a driving device for the same which are capable of continuously reproducing an optical video disc having a diameter of about 12 cm.

[0003]

2. Description of the Related Art Conventionally, a CD (compact disc,
That is, an autochanger is well known as a drive device for continuously reproducing an optical information recording disk having a diameter of 12 cm and recording a digital audio signal) or a tape cassette. In such an autochanger, a plurality of CDs are radially arranged on a rotatable cylindrical body having a partition called a carousel, and rotation of the carousel is stopped at a predetermined position to make a predetermined CD.
After being selected by the loading mechanism and placed on the reproducing device, the pickup mechanism is moved to continuously reproduce the CD or the like.

Furthermore, a plurality of shelves vertically stacked in a C
Place D, move the disc player (or shelf storage) up and down along the shelf like an elevator, and stop the disc player (or shelf storage) at a predetermined selected CD position. Then, the selected CD is taken out from the shelf board, placed on the disk reproducing device, and the optical pickup device is moved to perform continuous reproduction.

In addition, a plurality of CDs or the like is used as a cartridge.
There is no one that is configured to be stored in one cartridge and loaded into one cartridge.

[0006]

According to the above-mentioned autochanger, CDs can be continuously reproduced, but a carousel for rotatably storing a plurality of CDs in advance and a mechanism for moving a shelf storage portion. Alternatively, a mechanism for moving the disc reproducing device is required. Further, a mechanism for loading or placing the selected CD from the CD storage unit to the disc reproducing device is required, and the device becomes large,
There was a problem that the mechanism became complicated.

On the other hand, a CD-size LD in which software such as an LD for digitally recording a moving image in the same diameter as a CD of 12 cm is inserted in addition to a CD and a CDV which can contain a disc audio and an image with audio. Considering (hereinafter referred to as CD-LD), the reproduction time per one sheet is shorter than that of the LDs having diameters of 20 and 30 cm, and thus becomes shorter, for example, 1
Even playing the movie software of the time would require the replacement of at least two discs. Especially when the software is a movie or the like, it is necessary to quickly and continuously play it so that it will not be interrupted in the middle.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a disk cartridge and a driving apparatus for the same which can load and drive a plurality of disks very easily. It is a thing.

[0009]

As shown in FIGS. 1 and 2, the disk cartridge of the present invention has disk mounting portions 4A, 4B and 4C on the bottom surfaces 3A, 3B and 3C.
And a plurality of substantially fan-shaped disc storage portions 2A, 2B, 2C having through holes 5A, 5B, 5C for optical pickup, and an opening portion 5 for accommodating the plurality of disc storage portions 2A, 2B, 2C in a stack. The casing 6 is provided with a substantially rectangular casing 6 and a rotating shaft 7 provided near the opening 5 of the casing 6, and the rotating shaft 7 of the casing 6 is laminated on the rotating shaft 7 of the plurality of disc storage portions 2A, 2B, 2C. A disk cartridge characterized by being pivotally mounted rotatably.

As shown in FIG. 4, an example of the disk cartridge driving device of the present invention is a rotation provided in the vicinity of the opening 5 of the casing 6 by laminating a plurality of fan-shaped disk storage parts 2A, 2B, 2C. A guide portion 20 for guiding the disc cartridge 1 pivotally attached to the shaft 7,
By engaging the rotating shaft 7 of the disc cartridge 1 inserted at a predetermined position of the guide portion 20, the disc storage portion 2A,
Drive means 2 for spreading 2B and 2C from the casing 6 in a fan shape
1 and laminated disk storage units 2A, 2B, 2
It is provided with a plurality of disk drive means 33A, 22B, 22C which are arranged with a step difference of C.

The disc cartridge according to the present invention is, for example, as shown in FIGS. 5 to 7, formed in a substantially rectangular flat plate shape and having a concave portion for positioning and holding the first disc 201a on the upper surface thereof. A first disc housing portion 102a having a first disc mounting portion 117 and a first optical pickup through hole 116 extending from the central portion to one side edge portion.
And a second disc mounting portion 118, which is formed in a substantially rectangular flat plate shape and which positions and holds the second disc 201b on the upper surface portion, has a second disc mounting portion 118 extending from the central portion to one side edge portion. A second disc storage portion 102b having an optical pickup through hole 104 formed therein, and the respective disc storage portions 102a, 102a,
Each of the disk storage units 10 includes a casing-like casing 106 that movably supports the storage position of the stack 102b in a stacked state and the position of projecting the storage device 102b outward.
2a and 102b, when moved to a state in which they are projected from the casing 106, one side edges thereof are brought close to each other and face each other, and the through holes 116 for the optical pickups,
Each of these disc storage parts 102a, 102
A continuous hole is formed between the central portions of 2b.

Further, the disk cartridge according to the present invention is the above-mentioned disk cartridge, wherein
Alternatively, the second disc storage portions 102a and 102b are the second disc storage portions 102a and 102b when the disc storage portions 102a and 102b are stacked on top of each other and stored in the casing 106.
Or, it has a tongue piece portion 103 for closing a defect portion which is one side edge portion of the second or first disc storage portion 102b, 102a of the first optical pickup through hole 104, 116. is there.

[0013]

According to the present invention, a plurality of discs are arranged in one cartridge, and the disc cartridge driving means can very easily load the disc storage portion on which the plurality of discs are mounted, and immediately shift to the reproducing state. It is possible to obtain a disc cartridge driving device as much as a disc cartridge capable of extremely rapid continuous reproduction.

Further, in the disc cartridge according to the present invention, as shown in FIG. 7, for example, the discs 201a, 201 are formed on the upper surfaces of the respective rectangular flat plates.
Recessed disk mounting portion 11 for positioning and holding b
Each of the disc storage portions 102a and 102b having the optical pickup through holes 116 and 104 extending from the central portion to one side edge portion is formed in the disc storage portion 102.
When the casings 106 that support the a and 102b are movably supported, their one side edges are made to face each other and face each other, and the optical pickup through holes 116 and 104 are used to form these discs. Since a continuous through hole is formed between the central portions of the accommodating portions 102a and 102b, one optical pickup can be used to perform continuous recording and / or reproduction on the discs 201a and 201b. it can.

Further, in the above-mentioned disc cartridge, the first or second disc storage portion 102a,
102b, each of the disc storage portions 102a, 102b
Of the second or first optical pickup through-holes 104, 116 on one side edge of the second or first disc storage portion 102b, 102a when the two are stacked and stored in the casing 106. By providing the tongue piece portion 103 for closing the defective portion which is a portion, when the disc storage portions 102a and 102b are stacked on top of each other and stored in the casing 106, the respective discs 2 are stored.
01a and 201b are set in a state of being substantially sealed and stored.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk cartridge capable of accommodating three CD-LDs will be described below with reference to FIGS. 1 to 3 and a drive device for reproducing the disk cartridge will be described in detail with reference to FIG.

First, the disk cartridge 1 will be described with reference to FIGS. FIG. 1 is a perspective view showing a state where a disc is stored in a cartridge, and FIG. 2 is a perspective view showing a state where a plurality of discs are spread like a fan and loaded.

In FIG. 1, reference numeral 1 denotes a disc cartridge as a whole, and the casing of the disc cartridge 1 is a box-shaped box having a substantially rectangular shape, and front, rear, left and right side walls 1F, 1B, 1L,
Of the 1R, for example, the rear side wall 1B is formed with the opening 5,
It is integrally formed of a synthetic resin material or the like. Left side wall 1L
A notch 8 is also provided at the corner of the upper and lower side walls, and a through hole 9 into which the rotary shaft 7 is fitted is formed at the corners of the upper and lower side walls.

In this casing 6, fan-shaped disc storage portions 2A, 2B, 2C as shown in FIGS. 2 and 3 are stored so as to be stacked.

The disk accommodating portions 2A, 2B and 2C have radial side walls 10A, 10B and 10C and divergent bottom surfaces 3A, 3B and 3C, and radial side walls 10A and 10B.
The CD-L is formed at the substantially central position of the bottom surfaces 3A, 3B, 3C, which are composed of the apex corners 11A, 11B, 11C where 10C intersect.
A recess corresponding to the outer diameter of the CD-LD on which D is mounted is formed to form the disk mounting portions 4A, 4B, and 4C, and the laser beam emitted from the optical pickup is a CD-L.
Groove-shaped through holes 5A, 5B, 5 that can be moved in the width direction of D
C is formed.

The apex angle portions 11A, 11B and 11C are formed in a columnar shape, and through holes 12A, 12B and 12C for inserting the rotary shaft 7 are formed in the columnar portion. These disc storage portions 2A, 2B, 2C are stacked and inserted into the casing 6, and the through holes 12A, 12B, 12 of the cylindrical portion are formed.
A rotating shaft 7 is inserted through C, and the rotating shaft 7 is pivotally attached to a through hole 9 formed near the opening 5 on the upper surface of the casing 6, and the loading operation from the opening 5 of the casing 6 around the rotating shaft 7 is performed. It rotates and is expanded like a fan as shown in FIG.

FIG. 3 is an exploded perspective view for explaining a state in which the disk storage portions 2A, 2B, 2C are loaded from the casing 6, and 22A, 22B, 22C.
Is a disk drive means composed of a turntable including a spindle motor for rotating the CD-LD mounted on the disk mounting portions 4A, 4B, 4C of the disk storage portions 2A, 2B, 2C described later and a mechanism for holding the disk. is there.

The rotating shaft 7 is a driving means 21 for loading.
Then, as shown in FIG. 3, for example, when it is rotated counterclockwise CCW, the disc storage portion 2A is first pulled out from the casing 6.

The driving means 21 has a loading drive motor 23 which has a coupling 24 slidably mounted in the axial direction of the motor shaft. The coupling 24 is formed at the lower end of the rotary shaft 7. Engaging member 2 that fits into the engaging hole
Fix 5 By moving the coupling 24 up and down, the engaging member 25 is fitted into the engaging hole formed in the lower end of the rotary shaft 7, the motor 23 is rotated, and the disc storage portions 2A, 2 are rotated.
It is designed to push B and 2C apart.

The disk storage portion 2A first pulled out from the casing 6 and the disk storage portion 2 pulled out next.
On the side walls 10A and 10B of B, claws 13A and 13B are formed on the side walls 10A and 10B rearward with respect to the rotating direction. Further, only the disc storage portion 2A has a recess 14 formed in a portion facing the left side wall of the casing 6 when it is expanded as shown in FIG.

The claw 13A of the first disk storage portion 2A is hooked on the lower side of the side wall 10B of the second disk storage portion 2B and pulled out around the rotary shaft 7, and further the claw of the second disk storage portion 2B. 13B is locked to the lower side of the side wall 10C of the third disc storage portion 2C, and the third disc storage portion 2C
As shown in FIG. 2, C is pulled out from the casing 6 in the shape of a fan and the first to third disc storage portions 2A,
2B and 2C are expanded.

In this way, the respective disk storage portions 2A, 2
In the loading state in which B and 2C are expanded, the CD-LD is mounted on the disk mounting portions 4A, 4B and 4C, so the spindle hubs of the disk drive means 22A, 22B and 22C are set to the central holes of the CD-LD. CD to fit
-LD can be reproduced simultaneously or sequentially, or randomly.

The above-mentioned disc cartridge 1 has the apex portion 1
The vertical angle of 1A, 11B, and 11C is set to about 90 degrees, and three disks can be loaded at the same time. However, if this vertical angle is set to 45 degrees, six CD-LDs can be loaded at the same time. Is obtained. Of course, in this case, the size of the casing 6 of the disc cartridge 1 is larger than those of FIGS. 1 and 2, but it is also possible to use a disc cartridge on which a larger number of CD-LDs are mounted.

In the above-described embodiment, the fan-shaped disc storage portion 2
The case where A, 2B, and 2C are expanded in the counterclockwise direction CCW has been described, but if the rotary shaft 7 is disposed on the right side wall 1R side as viewed from the opening 5 as shown in FIG. It is also possible to expand 2A, 2B, 2C. In this case, the claws 13A and 13B which are loaded from the upper side of the stacked cartridge accommodating portions first and expanded in a fan shape are shown in FIG.
In contrast to the above case, it may be attached to the disc storage portions 2C and 2B, and the recess 14 may be provided in the disc storage portion 2C.

FIG. 4 shows an embodiment of a drive device for reproducing a disc using the disc cartridge as described above.
Will be explained.

According to the above-mentioned disc cartridge 1, when the disc storage portions 2A, 2B, 2C are loaded from the casing 6 and expanded in a fan shape, the side wall 10 at the time of stacking between the disc storage portions 2A, 2B, 2C.
A step corresponding to the thickness of A, 10B, and 10C is generated. For this reason, when the spindle hubs 26A, 26B, 26C of the disk drive means 22A, 22B, 22C are moved in the axial direction, the strokes must be changed for each drive means, and the control and mechanism thereof become complicated. Become.

Therefore, the disk cartridge drive device of this embodiment is provided with the disk drive means 22A, 22B,
A step is provided for each 22C so that the disks are arranged in a housing so that each disk is immediately fitted to the spindle hub 26A, 26B, 26C of the disk drive means 22A, 22B, 22C when the disk cartridge 1 is loaded. I am letting you.

In FIG. 4, an imaginary line 30 indicates a housing, and for example, the housing 30 has an insertion opening 31 on the front side thereof into which the disk cartridge 1 can be inserted. The disc cartridge 1 pressed from the insertion opening 31 in the direction of arrow A is guided along the guide portion 20 of the stepped chassis 32 arranged in the housing 30.

The guide portion 20 is an L mounted on the chassis 32.
The L-shaped members 20L and 20R are formed, and a through hole 33 is formed at the end of the L-shaped member 20L. The disc cartridge 1 is guided along the guide portion 20, and the center of the engaging hole provided on the lower surface of the rotating shaft 7 coincides with the center of the through hole 33 in a state where the insertion is restricted by a predetermined stopper mechanism (not shown). In this way, the solenoid of the coupling 24 of the drive means 21 is driven, the engaging member 25 moves upward in the direction of arrow B, and engages with the lower engaging hole of the rotary shaft 7 through the through hole 33. To do.

Next, when the loading motor 23 is rotated in the clockwise direction CW, the disk accommodating portions 2C, 2B, 2A are fanned out from the disk cartridge casing 6 and placed on the disk accommodating portions 2C, 2B, 2A. The center hole of the formed disc is the stepped chassis 32 and the stepped portions 34, 3
Disk drive means 22A, 22 provided at the lower end of
B and 22C spindle hubs 26A, 26B and 26C are fitted.

Spindle hub 2 of the first drive means 22A
The hub through hole 36A and the optical pickup guide groove 37A from which 6A is projected are formed on the same plane as the guide portion 20 or on a stepped chassis having a step difference by the thickness of the casing 6 of the disc cartridge 1 for the second drive. The hub through hole 36B from which the spindle hub 26B of the means 22B is projected and the optical pickup guide groove 37B are formed on the chassis in which the step 34 corresponding to the thickness of the disc storage portion 2A is formed.

Further, the hub through hole 36C through which the spindle hub 26C of the third drive means 22C is projected and the optical pickup guide groove 37C are formed on the chassis in which a step 35 corresponding to the thickness of the disc housing 2B is formed. ing.

According to the disk cartridge driving device having the above-mentioned structure, the predetermined C is stored in the disk storage portions 2A, 2B and 2C.
The disk cartridge 1 on which the D-LD is mounted is the housing 30
It is guided through the L-shaped members 20L and 20R of the guide portion 20 by being pushed in from the insertion port 31, and is stopped at a predetermined position by a stopper mechanism (not shown). At this time, the engaging hole formed at the lower end of the rotary shaft 7 of the disc cartridge 1 is arranged to face the through hole 33 formed in the stepped chassis 32.

Then, the solenoid or the like in the coupling 24 of the driving means 21 is driven to move the engaging member 25 upward and fit it into the engaging hole at the lower end of the rotary shaft 7.

Here, when the loading motor 23 is rotated clockwise CW, the disc storage portion 2C is first pulled out from the casing 6, and then the claw provided in the disc storage portion 2C is locked to the side wall of the disc 2B. Then, the disc storage portion 2B is pulled out from the casing 6, and finally the claw provided in the disc storage portion 2B is locked to the side wall of the disc storage portion 2A so that the disc storage portion 2A is pulled out from the casing 6 and the stepped chassis is formed. Each of the disc storage portions 2A, 2B, 2C is arranged in a predetermined position of 32 by being expanded.

In this state, the disk drive means 22A, 2
2B, 22C spindle hubs 26A, 26B, 26C
Are arranged so as to face the center holes of the disks placed in the disk storage portions 2A, 2B, 2C.

Therefore, the disk drive means 22A, 22
B, 22C spindle hubs 26A, 26B, 26C
By moving the same by the same stroke, the spindle hubs 26A, 26B and 26C are fitted in the disk center holes, and the disks can be driven to rotate.

According to the disc cartridge and the driving device thereof of the present invention, it is possible to obtain a disc cartridge in which a plurality of discs can be loaded onto a predetermined plurality of spindle hubs in a short time, and it is not necessary to correct the step difference. Is obtained.

The disc cartridge according to the present invention, as shown in FIGS.
1a and 201b are stored, and these two discs 201
It can be configured such that one optical pickup 204 can continuously record and / or reproduce the information signal for a and 201b.

That is, this disc cartridge is
As shown in FIGS. 5 to 8, the first and second disks 2
01a, 201b and these respective disks 201a, 20
1b corresponding to the first and second disc storage portions 102a and 102b, and the disc storage portion 102
and a casing 106 that houses a and 102b.

Each of the disks 201a and 201b is configured to have the substrate made of a transparent synthetic resin material and the like, and the signal recording portion formed on the main surface portion of the disk substrate. Each of these disks 201a, 20
The disk substrate 1b has a diameter of 12 cm and a thickness of 1.2 mm, for example. The disk substrate of each of the disks 201a and 201b has a center hole in the center thereof. This center hole is used for each of the disks 201a, 201b.
It is a circular through hole for positioning and chucking.

So-called compressed digital data is recorded in the signal recording portion of each of the disks 201a and 201b. Each of these disks 201a, 201
The digital data recorded in b, when used as a music signal or a video signal, has a reproduction time of about 60 minutes to 75 minutes when reproduced using an optical pickup having a laser light having a wavelength of 532 nm as a light source. Corresponding to the amount of information. Therefore, in this case, each disk 2
The reproducing time when 01a and 201b are continuously reproduced is about 120 to 150 minutes.

Then, the first disc storage portion 102
a is formed in a substantially rectangular flat plate shape larger than the first disk 201a, and the first disk 2 is formed on the upper surface portion.
01a is housed, and a first disc mounting portion 117 having a recessed portion for positioning and holding the first disc 201a is provided. The storage recess 110 is
A substantially rectangular shape is formed over substantially the entire surface of the first disk storage portion 102a. The first disc mounting portion 117 is a circular recess that substantially corresponds to the first disc 201a. That is, this first
The disk mounting portion 117 is formed on the bottom surface of the storage recess 110.

The first disk 201a is dropped into the first disk mounting portion 117 with the main surface portion serving as the signal reading surface facing downward and is positioned and held.

In the first disc storage portion 102a,
A first optical pickup through hole 116 is formed from the central portion to one side edge portion. The first optical pickup through hole 116 is formed so as to penetrate from the upper surface side to the lower surface side of the first disc storage portion 102a, and one side edge portion side of the first disc storage portion 102a. It is open to the public.

In addition, the first disc storage portion 102a
Is a tongue piece 103 for closing the lid, which is hung downwardly continuously from the front surface portion, and a tongue for rotational operation, which is hung downwardly continuously from the rear side portion of the one side edge portion. It has a piece 128a. Then, the first disc storage portion 102a
Has a first support arm portion 112 projecting laterally on the front side portion of the one side edge portion. A support hole 114 is formed in the first support bowl 112.

Then, the second disc storage portion 102
b is formed in a substantially rectangular flat plate shape having substantially the same size and shape as the first disc storage portion 102a, and the storage recess 1 for storing the second disc 201b on the upper surface portion.
11 and the second disc mounting portion 118 having a concave shape for positioning and holding the second disc 201b. The storage recess 111 is formed in a substantially rectangular shape over substantially the entire surface of the second disk storage portion 102b. The second disk mounting portion 118 is a circular recess substantially corresponding to the second disk 201b. That is, the second disc mounting portion 118 is
It is formed on the bottom surface of the storage recess 111.

The second disc 201b is dropped into the second disc mounting portion 118 with the main surface portion serving as the signal reading surface facing downward and is positioned and held.

In the second disc storage portion 102b,
A second optical pickup through hole 104 is formed from the central portion to the front end portion that is one side edge portion. The second optical pickup through hole 104 is formed so as to penetrate from the upper surface side to the lower surface side of the second disk storage portion 102b, and is formed on the front end edge side of the second disk storage portion 102b. It is open.

In addition, the second disk storage portion 102b
Is provided at the rear side portion of the one side edge portion with the tongue piece portion 1 for rotation operation.
It has a notch 129 corresponding to 28a. The second disc storage portion 102b has a second support arm portion 113 projecting laterally at the front side portion of the one side edge portion. A support hole 115 is formed in the second support bowl 113.

Further, the casing 6 is formed in a casing shape having a size capable of accommodating the disc accommodating portions 102a and 102b in an overlapping manner. This casing 6
The front part and the other side part are opened, and are respectively formed as a front side open part 105a and a side side open part 105b. That is, the casing 6 has a top plate portion 101a formed in a rectangular shape substantially similar to the main surface portions of the disc storage portions 102a and 102b, and the top plate portion 101a formed in the same manner as the top plate portion 101a. A bottom plate portion 101b that is parallel to the top plate portion 101a and the bottom plate portion 101b.
The rear wall portion 101c extends between the rear edge portions, and the side wall portion 101d extends between the edge portions of the top plate portion 101a and the bottom plate portion 101b.

A pair of positioning holes 119 and 120 for positioning the casing 6 when the disc cartridge is mounted in the disc cartridge driving device are formed in the bottom plate portion 101c at both positions on the rear side. It is set up.

The casing 6 extends over a position for accommodating the disc accommodating portions 102a, 102b in a stacked state and a position for projecting outward.
It supports movably.

That is, each of the disc storage portions 102 described above.
a, 102b Support holes 11 of each support bowl 112, 113
The rotating shaft 108 is inserted through the shafts 4, 115. As shown in FIG. 14, the rotating shaft 108 has its upper end rotatably supported by the top plate 101a of the casing 6 and its lower end rotatably by the bottom plate 101b of the casing 6. It is supported.

The upper end side of the rotary shaft 108 is fitted and supported by a support through hole 109 formed near one side of the front portion of the top plate portion 101a. This rotating shaft 108
The upper end side of the top plate portion 10 is reduced in diameter and engaged with the retaining protrusion 127 protruding in the support through hole, and the washer 107 is attached to the upper end portion.
It is designed to prevent it from coming off from 1a. Further, the lower end side of the rotating shaft 108 is fitted into and supported by a supporting through hole formed near the one side of the front side portion of the bottom plate portion 101b. Therefore, the rotating shaft 108 is supported at a position near the one side of the front side portion of the casing 6 so as to extend between the top plate portion 101a and the bottom plate portion 101b.

The rotation shaft 108 has a rotation regulating pin 13 on the rotation shaft 108.
0 is attached to both sides of the rotary shaft 108 so as to be orthogonal to the axial direction of the rotary shaft 108 with both ends thereof protruding. This rotation restriction pin 1
Reference numeral 30 denotes a bottom surface portion of the first disc storage portion 102a, which is fitted in a rotation restriction recess 126 provided in a peripheral portion of the support light 114. That is, the rotation of the first disc storage portion 102a and the rotation shaft 108 is restricted. Further, the second disc storage portion 102b is rotatable with respect to the rotation shaft 108.

The lower end of the rotating shaft 108 faces the outer side of the casing 6 toward the lower side. An engaging portion 125 is formed at the lower end of the rotating shaft 108. The engaging portion 125 is configured so that the engaging shaft 214 of the driving means included in the disk cartridge driving device for recording and / or reproducing the information signal using the disk cartridge can be engaged. This engagement shaft 214
Engages with the engaging portion 125 to rotate the rotating shaft 108.

Then, each of the disc storage portions 102a, 102a,
As shown in FIG. 5, the reference numeral 102b designates the first disc storage portion 102a above the second disc storage portion 102b.
Are stacked and stored in the casing 6. At this time, the lid closing tongue portion 103 closes the defective portion which is the front end side portion of the second disc storage portion 102b of the second optical pickup through hole 104. The turning operation tongue piece 128a is fitted in the notch 129. That is, at this time, the disks 201a and 201b are housed in a sealed state by the top plate portion 101a, the bottom plate portion 101b, the side wall portion 101d, and the closing lid tongue portion 103. There is.

Then, the first disc storage portion 102
As shown in FIG. 7, a is rotated about the axis of the rotary shaft 108 by about 180 degrees together with the rotary shaft 108, and the front side opening portion 105a and the side side opening portion 105 are rotated.
It is movable to the outside of the casing 6 via b. In addition, the second disc storage portion 102b
As shown in FIG. 7, the front opening portion 105a is rotated about 90 degrees around the rotation shaft 108.
Also, it can be moved outward from the casing 6 through the side opening portion 105b. In this way, the first disk storage portion 102a is rotated about the axis of the rotation shaft 108 by 180 degrees, and the second disk storage portion 102b is rotated about the rotation shaft 108 by 90 degrees. When the disc storage portions 102a, 102a, 1 are rotated by a certain degree,
02b has one side edge portion and a front portion that are close to each other and face each other, and the above-mentioned optical pickup through holes 116 and 10 are provided.
4 for each of these disk storage units 102a, 102b
A continuous hole is formed between the central portions of the.

The disc cartridge has a lock mechanism for locking the first disc storage portion 102a in the casing 6. This locking mechanism, as shown in FIGS. 10 to 13, has a lock hole 121 formed in the rear wall portion 101c.
And a lock pin 122 provided on the rear end surface portion of the first disc storage portion 102a. The lock pin 122 is projectingly provided on the tip side of a leaf spring portion 124 disposed in a recess 123 formed in the rear end surface portion of the first disc storage portion 102a, and the first disc storage portion 102a is formed. Is projected to the rear side of. The leaf spring portion 124
Is formed integrally with the first disc storage portion 102a by connecting the base end side to the first disc storage portion 102a. The leaf spring portion 124 is provided along the rear surface portion of the first disc storage portion 102a, and the recess 1
It is arranged in the inside of the concave portion 23 and is elastically deformable so as to be depressed inside the concave portion 123 as shown by an arrow F in FIG. By being pressed from the rear side, the lock pin 122 can be retracted into the recess 123 while elastically deforming the leaf spring portion 124.

The lock pin 122 is fitted into the lock hole 121 as shown in FIG. 11 when the first disk storage portion 102a is stored in the casing 6, and First disk storage unit 10
Rotation of the rotating shaft 2a and the rotating shaft 108 with respect to the casing 6 is blocked. The lock pin 122 is shown in FIG.
As shown in FIG. 2, when the lock hole 121 is pressed through the lock hole 121 and is recessed in the recess 123,
1 is released from the fitting, and the first disc storage portion 1 is released.
02a and the rotation shaft 108 are prevented from rotating with respect to the casing 6. At this time, the first disc storage portion 102a is rotatable with respect to the casing 6, as indicated by arrows D and E in FIGS. 10 and 13.

A disc cartridge driving device for recording and / or reproducing an information signal using the disc cartridge according to the present invention having the above-described structure has a chassis 207 as shown in FIGS. A pair of first and second spindle motors 211 and 212 and an optical pickup 204 are provided on the chassis 207.

The optical pickup 204 has a light source such as a semiconductor laser, a predetermined optical device for guiding a light beam emitted from the light source, an objective lens 210 for condensing the light beam, and an optical block for holding the light source. Is configured. This optical block is formed of a material such as a synthetic resin material or a metal, and has a lens barrel portion for holding an optical device or the like. The luminous flux emitted by the light source is
The wavelength of the laser light flux is, for example, 532 nm.

The above-mentioned first and second spindle motors 21
The first and second spindle hubs 203a and 203b of the motors 1 and 212 are attached to the tip ends of the motor shafts, respectively. These spindle hubs 203a, 20
3b is formed in a substantially disc shape, and has a truncated cone-shaped positioning protrusion in the central portion of the upper surface. These spindle hubs 2
03a and 203b are the first and second disks 20.
When 1a and 201b are placed correspondingly, the positioning protrusions are fitted into the center holes of the respective discs 201a and 201b for positioning, and the peripheral portions of the positioning protrusions are brought into contact with the peripheral portions of the center holes. Hold. This holding is performed, for example, by a magnetic attraction force. That is, by incorporating a magnet in the positioning protrusion,
By attaching a magnetic metal member such as iron to each of the disks 201a and 201b,
1a and 201b are the respective spindle hubs 203a and 2b
It is adsorbed on 03b.

The motor axes of the spindle motors 211 and 212 and the optical axis of the optical pickup 204 are parallel to each other, and are directed substantially vertically to the chassis 207. The distance between the motor shafts of the spindle motors 211 and 212 is substantially equal to or slightly larger than the diameter of the disks 201a and 201b. Therefore, each of the discs 201 is connected by the spindle hubs 203a and 203b.
When a and 201b are held correspondingly, these disks 201a and 201b are in a state of being arranged in parallel on the same plane.

In the optical pickup 204, the optical block is slidably supported by the guide shaft 205, and as shown by an arrow A in FIGS. 7 and 9, the vicinity of the first spindle motor 211. As a result, the movable operation can be performed near the second spindle motor 212. The optical pickup 204 is moved between the spindle motors 211 and 212 to move the objective lens 210 over the inner and outer circumferences of the disks 201a and 201b held by the spindle hubs 203a and 203b. They can face each other.
The optical pickup 204 uses the optical disks 210 described above.
By writing the above-mentioned light flux to the signal recording unit of a and 201b by irradiating it, and detecting the reflected light flux of this light flux from the signal recording unit, writing and / or writing of the information signal into the signal recording unit Alternatively, read out.

A pair of positioning pins 208 and 209 are erected on the chassis 207. These positioning pins 208 and 209 are tapered on the tip side, and when the disk cartridge is mounted on the chassis 207, the positioning pins 208 and 209 are fitted to correspond to the pair of positioning holes 119 and 120 of the casing 6. The casing 6 is positioned with respect to the chassis 207. The chassis 207 has the spindle motors 21 as shown by arrows B and C in FIG.
It is possible to move the motors 1 and 212 in the motor axis direction, that is, in the vertical direction.

In order to mount the disc cartridge according to the present invention on the disc cartridge driving device, the casing 6 is held at a position above the chassis 207 by a holding mechanism (not shown). At this time, the respective disk storage portions 102a and 102b are stored in the casing 6 while being superposed on each other. At this time, as shown in FIG. 12, the lock release pin 21 of the disk cartridge drive device is provided.
3 enters the lock hole 121, and the lock pin 1
22 is pressed to release the blocking of the rotation of the first disk storage portion 102a with respect to the casing 6.

Next, the engaging shaft 214 of the disk cartridge driving device advances to the engaging portion 125 and engages with the engaging portion 125, as indicated by an arrow G in FIG. The engagement shaft 214 is rotated by a driving unit (not shown) to rotate the rotation shaft 108. Then, the first disc storage portion 102a is
As shown by the arrow D in FIGS. 10 and 13, it is rotated so as to come out of the casing 6. As shown in FIG. 7, the first disc storage portion 102a is approximately 1
It is rotated over 80 degrees. When the first disc storage portion 102a is rotated about 90 degrees, the second disc storage portion 102b is caused to contact the contacted portion 128b by the rotation operation tongue piece portion 128a. When pressed, the rotation starts, and the first disk storage unit 10
When 2a is rotated by about 180 degrees, it is rotated by about 90 degrees as shown in FIG. The abutted portion 128b has the first disk storage portion 102a of 9
The tongue piece 1 for rotating operation when rotated by 0 degree
28a is an abutting portion and is an inner wall portion on the front side of the storage recess 111 of the second disk storage portion 102b.

In this state, the first and second optical pickup through holes 116 and 104 form continuous through holes between the central portions of the respective disk accommodating portions 102a and 102b.

Next, the chassis 207 is moved up as shown by the arrow B in FIG. 8 to approach the disk cartridge. As shown in FIG. 9, when the chassis 207 is raised to a predetermined position, the chassis 6 is positioned by positioning the casing 6 by fitting the pair of positioning pins 208 and 209 into the positioning holes 119 and 120. And hold. At this time, the spindle hubs 203a and 203b are connected to the disks 201a and 2b, respectively.
01b is held correspondingly. Each of these discs 201
a and 201b are the above-mentioned spindle hubs 203a and 20b.
3b, the corresponding disc storage portions 102a, 102
It is lifted above 2b.

In this state, the spindle motors 211 and 212 are rotationally driven to rotate the corresponding disks 201a and 201b. Then, the optical pickup 204 is arranged to
The objective lens 210 can be made to face the entire surface of the signal recording portions 1a and 201b, and information signals can be written and / or read from the signal recording portions.

It should be noted that each of the above-mentioned disks 201a, 201b
The order of writing and reading of information signals to and from the first disk 201a is from the inner circumference side to the outer circumference side, and then on the second disk 201b from the outer circumference side to the inner circumference side. Writing or reading can be performed. In this case, the optical pickup 204 includes the second spindle motor 21 from the side of the first spindle motor 211.
Information signals can be written and / or read to / from each of the disks 201a and 201b by moving in only one direction to the second side.

Further, each of the above-mentioned disks 201a, 201b
The order of writing and reading of information signals is as follows. Writing or reading is performed from the inner circumference side to the outer circumference side of the first disk 201a, and then from the inner circumference side to the outer circumference side of the second disk 201b. Alternatively, writing or reading may be performed.

In order to take out this disc cartridge from the disc cartridge driving device, first, the chassis 207 is lowered as shown by an arrow C in FIG. Next, each of the disc storage portions 102a and 102b
Is rotated by rotating the rotating shaft 108 to be housed in the casing 6. The first disc storage portion 102a is, as shown by an arrow E in FIG.
The front end portion of the lock pin 122 is connected to the rear wall portion 101c.
It is housed in the casing 6 while being in sliding contact with the inner part of the and the tip of the lock release pin 213. When the lock release pin 213 is withdrawn from the lock hole 121, the lock pin 122 is fitted into the lock hole 121 by the elastic force of the leaf spring portion 124 as shown in FIG. First disk storage unit 10
The rotation of 2a is blocked. In this state, the disc cartridge is taken out from the disc cartridge driving device.

As shown in FIGS. 15 to 19, the disc cartridge according to the present invention includes the disc storage portions 102a and 102b, and the second disc storage portion 102a above the first disc storage portion 102a. Part 102b
May be stacked and housed in the casing 6.

That is, this disc cartridge is
As shown in FIGS. 15 to 17, the first and second discs 201 are similar to the disc cartridge described above.
a, 201b and each of these disks 201a, 201b
Corresponding first and second disk storage portions 10
2a and 102b, and these disk storage portions 102a and 1
And the casing 106 for housing 02b.

The casing 6 is the casing 6 of the disc cartridge described above with reference to FIGS.
Is formed similarly to. The casing 6 movably supports the disc storage portions 102a and 102b between a position where they are stored in a stacked state and a position where they are projected outward.

As shown in FIG. 16, the first disc storage portion 102a of this disc cartridge is formed in a substantially rectangular flat plate shape larger than the first disc 201a, and the first disc storage portion 102a is formed on the upper surface thereof. It has a storage recess 110 for storing 201a, and a recess-shaped first disc mounting portion 117 for positioning and holding the first disc 201a. The storage recess 110 is formed in a substantially rectangular shape over substantially the entire surface of the first disk storage portion 102a. The first disk mounting portion 117
Is a circular recess substantially corresponding to the first disk 201a. That is, this first disk mounting portion 1
17 is formed on the bottom surface of the storage recess 110.

The first disc 201a is dropped into the first disc mounting portion 117 with the main surface portion serving as the signal reading surface facing downward and is positioned and held.

In the first disc storage portion 102a,
A first optical pickup through hole 116 is formed from the central portion to one side edge portion. The first optical pickup through hole 116 is formed so as to penetrate from the upper surface side to the lower surface side of the first disc storage portion 102a, and one side edge portion side of the first disc storage portion 102a. It is open to the public.

Further, the first disc storage portion 102a
Has a tongue piece portion 103 for closing the lid which is vertically extended continuously from the front surface portion, and a cutout portion 129 adjacent to the other side of the tongue piece portion 103 for closing the lid. There is. The first disc storage portion 102a has a first support arm portion 112 projecting laterally on the front side portion of the one side edge portion.
have. A support hole 114 is formed in the first support bowl 112.

Then, the second disc storage portion 102
b is formed in a substantially rectangular flat plate shape having substantially the same size and shape as the first disc storage portion 102a, and the storage recess 1 for storing the second disc 201b on the upper surface portion.
11 and the second disc mounting portion 118 having a concave shape for positioning and holding the second disc 201b. The storage recess 111 is formed in a substantially rectangular shape over substantially the entire surface of the second disk storage portion 102b. The second disk mounting portion 118 is a circular recess substantially corresponding to the second disk 201b. That is, the second disc mounting portion 118 is
It is formed on the bottom surface of the storage recess 111.

The second disc 201b is dropped into the second disc mounting portion 118 with the main surface portion serving as the signal reading surface facing downward and is positioned and held.

In the second disc storage portion 102b,
A second optical pickup through hole 104 is formed from the central portion to the front end portion that is one side edge portion. The second optical pickup through hole 104 is formed so as to penetrate from the upper surface side to the lower surface side of the second disk storage portion 102b, and is formed on the front end edge side of the second disk storage portion 102b. It is open.

In addition, the second disk storage portion 102b
Has a contacted tongue piece 128a on the other side portion of the front end edge portion. Then, the second disc storage portion 102
b has a second support arm portion 113 projecting laterally on the front side portion of the one side edge portion. A support hole 115 is formed in the second support bowl 113.

Then, each of the disc storage portions 102a,
102b, support holes 114 of the support bowls 112 and 113,
The rotating shaft 108 is inserted through 115. The upper end of the rotating shaft 108 is the top plate portion 1 of the casing 6.
01a is rotatably supported, and the lower end side is the casing 6
Is rotatably supported by the bottom plate portion 101b.

The rotation restricting pin 13 is attached to the rotation shaft 108.
0 is attached to both sides of the rotary shaft 108 so as to be orthogonal to the axial direction of the rotary shaft 108 with both ends thereof protruding. This rotation restriction pin 1
Reference numeral 30 denotes an upper surface portion of the first disc storage portion 102a, which is fitted in a rotation restriction recess 126 provided in the peripheral portion of the support light 114. That is, the rotation of the first disc storage portion 102a and the rotation shaft 108 is restricted. Further, the second disc storage portion 102b is rotatable with respect to the rotation shaft 108.

Then, each of the disc storage portions 102a,
As shown in FIG. 15, the reference numeral 102b designates the second disc storage portion 102 above the first disc storage portion 102a.
It is housed in the casing 6 in a state where b is overlapped. At this time, the lid closing tongue portion 103 closes the defective portion which is the front end side portion of the second disc storage portion 102b of the second optical pickup through hole 104. In addition, the pressed tongue piece 128a is provided with the notch 12
9 is fitted. That is, at this time, the disks 201a and 201b are housed in a sealed state by the top plate portion 101a, the bottom plate portion 101b, the side wall portions 101d, and the closing lid tongue portion 103. There is.

Then, the first disc storage portion 102
As shown in FIG. 17, a is rotated together with the rotating shaft 108 by about 180 degrees about the axis of the rotating shaft 108, and the front side opening portion 105a and the side opening portion 10a.
It is movable to the outside of the casing 6 via 5b. In addition, the second disc storage portion 102b
As shown in FIG. 17, the front opening portion 105 is rotated about 90 degrees around the rotation shaft 108.
The casing 6 through the a and the side opening portion 105b.
It is possible to move to the outside. In this way, the first disc storage portion 102a is rotated about the axis of the rotation shaft 108 by 180 degrees, and the second disc storage portion 102b is rotated about the rotation shaft 108 by 90 degrees. When the disc storage portions 102a, 102a,
102b has one side edge portion and a front portion that are close to each other and face each other.
04, each of these disk storage units 102a, 102
A continuous hole is formed between the central portions of b.

The disc cartridge has a lock mechanism for locking the first disc storage portion 102a in the state where it is stored in the casing 6. This locking mechanism, as shown in FIGS. 18 and 19, has the positioning hole 1 formed in the bottom plate portion 101b.
19 and a lock pin 122 provided on the bottom surface of the first disc storage portion 102a. The lock pin 122 serves as the first disc storage portion 102a.
It is provided so as to project from the tip end side of the leaf spring portion 124 disposed in the concave portion 123 formed in the bottom surface portion of the first disc housing portion 102a. The leaf spring portion 124
Is formed integrally with the first disc storage portion 102a by connecting the base end side to the first disc storage portion 102a. The leaf spring portion 124 is provided along the bottom surface of the first disc storage portion 102a, and the recess 1
It is disposed in the inside of the concave portion 23 and can be elastically deformed so as to be recessed inside the concave portion 123 as shown by an arrow H in FIG. By pressing the lock pin 122 from the lower side, it is possible to retract the lock spring 122 in the recess 123 while elastically deforming the leaf spring portion 124.

Then, when the first disk housing portion 102a is housed in the casing 6, the lock pin 122 is fitted into the positioning hole 119 as shown in FIG. First disk storage unit 1
02a and the rotating shaft 108 are prevented from rotating with respect to the casing 6. Then, as shown in FIG. 19, when the lock pin 122 is pressed through the positioning hole 119 and is recessed in the recess 123, the lock pin 122 is released from the fitting to the positioning hole 119 and the first locking pin 122 is released. The blocking of the rotation of the disc storage portion 102a and the rotation shaft 108 with respect to the casing 6 is released. At this time, the first disc storage portion 102a is rotatable with respect to the casing 6.

A disc cartridge driving device for recording and / or reproducing information signals using this disc cartridge has the same structure as the disc cartridge driving device using the disc cartridge described above with reference to FIGS. 5 to 7.

In this disc cartridge, the positioning pin 209 is inserted in the positioning hole 119.
As shown in FIG. 19, the lock pin 122 is pressed by the insertion of the first disc storage portion 1
The blocking of the rotation of 02a with respect to the casing 6 is released.

In this disc cartridge, the second disc storage portion 102b is arranged such that the first disc storage portion 102a is approximately 9 outside the casing 6.
When rotated by 0 °, the contacted tongue piece 128a is moved to the rotation operation portion 128b of the first disc storage portion 102a.
It starts rotating by being abutted and pressed by
When the first disc storage portion 102a is rotated by approximately 180 degrees, it is rotated by approximately 90 degrees, as shown in FIG. The turning operation portion 128b is a portion that comes into contact with the abutted tongue piece portion 128a when the first disc storage portion 102a is rotated through 90 degrees, and the first disc storage portion 128a. Storage recess 11 of the portion 102a
0 is the rear side portion of the one side inner wall portion.

Also in this disc cartridge, the discs 201a and 201b are rotated by the spindle motors 211 and 212, and the optical pickup 204 writes and / or reads information signals to and from the signal recording unit. It can be done continuously.

[0102]

According to the present invention, a disc cartridge suitable for random reproduction of a plurality of discs or continuous or simultaneous reproduction can be obtained. Furthermore, it is possible to load a plurality of discs in a short time and to perform step correction. Thus, a disk cartridge drive device having no disk is obtained.

Further, the disk cartridge according to the present invention is provided with a concave disk mounting portion which is formed in a substantially rectangular flat plate shape and which positions and holds the disk on the upper surface portion, and is located at one side edge from the central portion. It has a first and a second disc storage portion in which a through hole for an optical pickup is formed, and these disc storage portions are in a state of being projected from a casing-like casing that movably supports these disc storage portions. When one side edges of the optical pickup are arranged to face each other in close proximity to each other so that a continuous through hole is formed between the central portions of the respective disk accommodating portions, With this optical pickup, continuous recording and / or reproduction can be performed on each of the disks.

That is, in this case, it is possible to realize continuous recording and / or reproduction for two discs while simplifying the device constitution of the disc cartridge driving device by reducing the number of optical pickups to one. it can.

Further, in the above-mentioned disc cartridge, when the respective disc accommodating portions are superposed on each other and accommodated in the casing, the through holes for the respective optical pickups are provided in the first or second disc accommodating portion. When a tongue portion for closing the defective portion which is one side edge portion of the second or first disc storage portion is provided, the respective disc storage portions are superposed on each other and stored in the casing. At this time, since each of the disks is housed in a substantially sealed state, it is possible to prevent the disks from being soiled or damaged when not in use such as storage or transportation.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc cartridge of the present invention in a closed state.

FIG. 2 is a perspective view showing a state in which a disc storage portion of the disc cartridge of the present invention is expanded.

FIG. 3 is an exploded view for explaining a loading state of the disc cartridge of the present invention.

FIG. 4 is a configuration diagram of a disk cartridge driving device of the present invention.

FIG. 5 is a perspective view showing another example of the configuration of the disc cartridge according to the present invention.

6 is an essential part exploded perspective view showing the configuration of the main part of the disk cartridge shown in FIG. 5;

FIG. 7 is a plan view showing the configuration of the disc cartridge shown in FIG. 5 with a part thereof broken away.

8 is a side view showing a state in which the disc cartridge shown in FIG. 5 is mounted in a disc cartridge driving device.

9 is a side view showing a state in which the disc cartridge shown in FIG. 5 is mounted in a disc cartridge driving device.

10 is an enlarged perspective view of an essential part showing the configuration of the lock mechanism of the disc cartridge shown in FIG. 5;

FIG. 11 is an enlarged transverse cross-sectional view of a main part showing the configuration of the lock mechanism.

FIG. 12 is an enlarged transverse cross-sectional view of essential parts showing a state where the lock mechanism is released.

FIG. 13 is an enlarged transverse cross-sectional view of essential parts showing a state where the lock mechanism is released and the disc storage portion is rotated.

14 is an enlarged longitudinal sectional view of an essential part showing the configuration of a rotation shaft that supports each disk storage portion of the disk cartridge shown in FIG. 5;

FIG. 15 is a perspective view showing still another example of the configuration of the disc cartridge according to the present invention.

16 is an essential part exploded perspective view showing the structure of the main part of the disk cartridge shown in FIG. 15;

FIG. 17 is a plan view showing the structure of the disk cartridge shown in FIG. 15 with a part thereof broken away.

FIG. 18 is an enlarged vertical sectional view of an essential part showing the configuration of the lock mechanism of the disc cartridge shown in FIG. 15;

FIG. 19 is an enlarged vertical sectional view of an essential part showing a state in which the lock mechanism shown in FIG. 18 is released.

[Explanation of symbols]

 1 Disc Cartridge 2A, 2B, 2C Disc Storage Section 7 Rotation Shaft 32 Stepped Chassis 34, 35 Step Section 102a First Disc Storage Section 102b Second Disc Storage Section 103 Closing Tongue Section 104 Second Optical Pickup Through-hole 106 casing 116 through-hole for first optical pickup 117 first disc mounting portion 118 second disc mounting portion 201a first disc 201b second disc

Claims (4)

[Claims] 1. A substantially rectangular shape having a plurality of substantially fan-shaped disk storage portions each having a disk mounting portion and a through hole for an optical pickup formed on a bottom surface, and an opening for accommodating the plurality of disk storage portions in a stacked manner. And a rotary shaft provided in the vicinity of the opening of the casing, wherein the plurality of disk storage units are laminated and rotatably mounted on the rotary shaft of the casing. Disk cartridge to do. 2. A guide part for laminating a plurality of fan-shaped disk storage parts, which guides a disk cartridge pivotally attached to a rotary shaft provided in the vicinity of an opening of a casing, and a predetermined position of the guide part. Drive means for engaging the rotary shaft of the inserted disc cartridge to expand the disc storage portion in a fan shape from the casing, and a plurality of stepped portions provided for the laminated disc storage portion. A disk cartridge driving device comprising a disk driving means. 3. A substantially rectangular flat plate-shaped member having a first upper surface.
A first disc storage portion having a concave first disc mounting portion for positioning and holding the disc, and having a first optical pickup through hole extending from the central portion to one side edge portion. , A second disc mounting portion which is formed in a substantially rectangular flat plate shape, and has a recessed second disc mounting portion for positioning and holding the second disc on the upper surface portion, and extends from the central portion to one side edge portion. A second disk storage portion having a pickup through hole formed therein, and a housing shape that movably supports the above-described disk storage portions between a storage position in which they are stacked and a position where they project outward. When each of the disc storage portions is moved into a state of being protruded from the casing, one side edge of the disc storage portion faces each other so as to face each other, and the disc storage portions are accommodated by the optical pickup through holes. Central parts of parts Disc cartridge by forming a through hole continuous over. 4. The first or second disc storage portion has a second or first optical pickup through hole when the disc storage portions are stacked on each other and stored in the casing. 4. The disc cartridge according to claim 3, further comprising a tongue portion that closes a defect portion that is one side edge portion of the first disc storage portion.