JP2004014115A - Disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk cartridge with improved dust resistance. <P>SOLUTION: The disk cartridge is provided with: an outer shell 1 having an outer side head access port 9; a shutter 4 for opening/closing the outer side head access port 9; an inner shell 2 which has an inner side head access port 16, houses a recording disk 3 insides and is housed to be turnable within the outer shell 1; and inner shell turning means 20, 43 and 46 for turning the inner shell 2 based upon the movement of the shutter 4. While the disk cartridge is not used, the inner side head access port 16 is positioned away from the outer side head access port 9, the outer side head access port 9 is closed by the shutter 4, and the inner side head access port 16 is closed with a part of the outer shell 1. While the disk cartridge is used, the outer side head access port 9 is opened by the movement of the shutter 4, and the inner shell 2 is turned to a position where the inner side head access port 16 is matched with the outer side head access port 9 via the inner shell turning means by the movement of the shutter 4. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a disk cartridge such as an optical disk cartridge and a magnetic disk cartridge, and more particularly to a disk cartridge excellent in dustproofness.

Generally, a conventional disk cartridge has a structure in which a recording disk is rotatably housed in a cartridge case, and a head access port formed in the cartridge case is opened and closed by a shutter.

The following patent documents can be cited as examples of this type of disk cartridge.
Japanese Patent Application Laid-Open No. H10-144033

However, in the conventional disk cartridge, dust is prevented from entering the cartridge case with one shutter, but this is not necessarily excellent in dustproofness and has a problem in reliability.

A first object of the present invention is to provide a highly reliable disk cartridge which is excellent in dustproofing and which solves such disadvantages of the prior art.

A second object of the present invention is to provide a highly reliable disk cartridge which solves the above-mentioned drawbacks of the prior art, is excellent in dustproofness, and can reliably protect the recording disk against external forces such as a drop impact. It is in.

In order to achieve the above object, a first means of the present invention includes an outer shell having an outer-side head access port, a shutter for opening and closing the outer-side head access port, and an inner-side head access port. A recording disk is housed, and an inner shell rotatably housed in the outer shell, and a rack unit, a pinion, an arc tooth unit, etc., which rotate the inner shell based on the movement of the shutter, are described below. And inner shell rotating means configured,
When the disk cartridge is not used, the inner head access port is located at a position away from the outer head access port, the outer head access port is closed by a shutter, and the inner head access port is closed by a part of the outer shell. When the disk cartridge is used, the outer head access port is opened by the movement of the shutter, and the inner head access port coincides with the outer head access port via the inner shell rotating means by the movement of the shutter. The inner shell is rotated up to this point.

According to a second aspect of the present invention, in the first aspect, there is provided a disk pressing member such as a disk pressing member and a C-ring, which will be described later, interlocked with the rotation of the inner shell. The recording disk is pressed and fixed by the disk pressing means, and when the disk cartridge is used, the disk pressing means is separated from the recording disk and the recording disk is rotatable. Things.

As described above, the present invention according to claim 1 (first means) has an outer shell having an outer-side head access port, a shutter for opening and closing the outer-side head access port, and an inner-side head access port. A recording disk stored inside, an inner shell rotatably stored in the outer shell, and an inner shell rotating means for rotating the inner shell based on movement of the shutter,
When the disk cartridge is not used, the inner head access port is located at a position away from the outer head access port, the outer head access port is closed by a shutter, and the inner head access port is closed by a part of the outer shell. When the disk cartridge is used, the outer head access port is opened by the movement of the shutter, and the inner head access port coincides with the outer head access port via the inner shell rotating means by the movement of the shutter. The inner shell is rotated up to this point.

Thus, when the disc cartridge is not used, the inner head access port is located away from the outer head access port, the outer head access port is closed by the shutter, and the inner head access port is part of the outer shell. And a double dustproof structure, it is possible to provide a highly reliable disk cartridge with excellent dustproofness.

The present invention according to claim 2 (second means) is characterized in that, in the first means, a disk pressing means is provided in conjunction with the rotation of the inner shell, and when the disk cartridge is not used, the disk pressing means. Thus, the recording disk is pressed and fixed, so that when the disk cartridge is used, the disk pressing means is separated from the recording disk and the recording disk is rotatable.

As described above, when the disk cartridge is not in use, the recording disk is firmly fixed by the disk pressing means, so the disk cartridge has excellent dust resistance, and is also a reliable disk cartridge that reliably protects the recording disk against external forces such as drop impact. Can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a disk cartridge such as an MO, FIG. 2 is a front view of the disk cartridge, FIG. 3 is a left side view of the disk cartridge, FIG. 4 is a right side view of the disk cartridge, FIG. FIG. 6 is an exploded perspective view of the disk cartridge.

The disk cartridge includes an outer shell 1, an inner shell 2 arranged inside the outer shell 1, a recording disk 3 (see FIG. 6) rotatably stored inside the inner shell 2, and the outer shell 1. The shutter 4 mainly includes a shutter 4 slidably supported outside of the shutter 1 and a slider 5 connected to the shutter 4.

The outer shell 1 is composed of a combination of a first outer shell 6 and a second outer shell 7, and the outer shells 6, 7 are screwed or ultrasonically welded.

7 to 14 are views showing the first outer shell, FIG. 7 is a plan view of the first outer shell, FIG. 8 is a front view of the first outer shell, and FIG. 9 is a left side view of the first outer shell. 10 is a right side view of the first outer shell, FIG. 11 is a rear view of the first outer shell, FIG. 12 is a bottom view of the first outer shell, FIG. 13 is a perspective view of the first outer shell as viewed from above, FIG. FIG. 4 is a perspective view of the first outer shell viewed from below.

15 to 22 show the second outer shell, FIG. 15 is a plan view of the second outer shell, FIG. 16 is a front view of the second outer shell, and FIG. 17 is a left side view of the second outer shell. 18 is a right side view of the second outer shell, FIG. 19 is a rear view of the second outer shell, FIG. 20 is a bottom view of the second outer shell, FIG. 21 is a perspective view of the second outer shell viewed from above, FIG. FIG. 4 is a perspective view of the second outer shell viewed from below.

A drive shaft insertion hole 8 is provided substantially at the center of the first outer shell 6 and the second outer shell 7, and an outer side head access port 9 is formed upstream of the drive shaft insertion direction in the disk cartridge insertion direction. On the upstream side in the disk cartridge insertion direction, there is provided a concave outer-side bridge portion 10 which is lowered further.

As shown in FIGS. 12 and 20, on both sides of the outer-side bridge portion 10, slider guide portions 11 extending linearly are formed. As shown in FIGS. 12 and 14 and FIGS. 20 and 22, positioning projections 12 are provided at equal intervals around the drive shaft insertion hole 8 on the inner surfaces of the first outer shell 6 and the second outer shell 7. I have.

The inner shell 2 is composed of a combination of the first inner shell 13 and the second inner shell 14. 23 to 28 show the first inner shell. FIG. 23 is a plan view of the first inner shell, FIG. 24 is a front view of the first inner shell, and FIG. 25 is a right side view of the first inner shell. 26 is a bottom view of the first inner shell, FIG. 27 is a perspective view of the first inner shell as viewed from above, and FIG. 28 is a perspective view of the first inner shell as viewed from below.

29 to 34 show the second inner shell, FIG. 29 is a plan view of the second inner shell, FIG. 30 is a front view of the second inner shell, and FIG. 31 is a right side view of the second inner shell. 32 is a bottom view of the second inner shell, FIG. 33 is a perspective view of the second inner shell as viewed from above, and FIG. 34 is a perspective view of the second inner shell as viewed from below.

A hub insertion hole 15 is formed at the center of the first inner shell 13 and the second inner shell 14, and an inner head access port 16 is provided near the hub insertion hole 15. A concave inner-side bridge portion 17 is formed.

As shown in FIGS. 26 and 28 and FIGS. 32 and 34, a disk-shaped recess 18 is provided inside the first inner shell 13 and the second inner shell 14. The recording disk 3 accommodated in the disk accommodating recess 18 has a hub 19 at the center as shown in FIG. 35, and upper and lower ends of the hub 19 are inserted into the first inner shell 13 and the second inner shell 14 through the hub. It is inserted through the hole 15.

An arcuate tooth 20 and a connection hole 21 are formed on the outer periphery of the first inner shell 13, and a connection pin 22 provided on the outer periphery of the second inner shell 14 is inserted into the connection hole 21, and the first The inner shell 13 and the second inner shell 14 are combined.

FIG. 35 is an exploded perspective view of the inner shell assembly. 36 to 41 show a state when the shutter is fully opened. FIG. 36 is a plan view of the inner shell assembly, FIG. 37 is a front view of the inner shell assembly, FIG. 38 is a right side view of the inner shell assembly, and FIG. FIG. 40 is an enlarged view of the portion of FIG. 39A, and FIG. 41 is a sectional view taken along the line BB of FIG. 40.

42 to 45 show a state when the shutter is fully closed. FIG. 42 is a plan view of the inner shell assembly, FIG. 43 is a bottom view of the inner shell assembly, FIG. 44 is an enlarged view of a part C in FIG. 43, and FIG. It is sectional drawing on line 44D-D.

As shown in FIG. 35, a C-ring 24 is installed above the hub insertion hole 15 of the first inner shell 13 and below the hub insertion hole 15 of the second inner shell 14 via a disc pressing member 23. .

46 is a plan view of the disk pressing member, FIG. 47 is a front view of the disk pressing member, FIG. 48 is a bottom view of the disk pressing member, FIG. 49 is a perspective view of the disk pressing member viewed from above, and FIG. FIG. 3 is a perspective view when viewed from below.

The disc holding member 23 has an annular shape as shown in these figures, and has a disc pressing portion 25 of a ridge and a plurality of projecting portions 26, and the projecting portion 26 is formed with an inclined surface 27. Each protrusion 26 is provided with a rotation preventing hole 28.

51 is a plan view of the C-ring, FIG. 52 is a front view of the C-ring, FIG. 53 is a bottom view of the C-ring, FIG. 54 is a perspective view of the C-ring viewed from above, and FIG. FIG.

The C ring 24 is provided with a plurality of protrusions 29 protruding inward, and inclined surfaces 30 are formed on both sides thereof. A connecting pin 31 protrudes near the protruding portion 29.

As shown in FIGS. 23 and 27, and FIGS. 29 and 33, a disk holding member receiving portion 32, which is one step lower, is formed on the outer periphery of the hub insertion hole 15 of the first inner shell 13 and the first inner shell 14. A plurality of inclined portions 33 are provided in the circumferential direction thereof. A C-ring housing portion 34 is formed radially outward of the disc holding member housing portion 32, and a plurality of through holes 35 are provided in a circumferential direction of the C-ring housing portion 34.

56 is a plan view of the shutter, FIG. 57 is a front view of the shutter, FIG. 58 is a left side view of the shutter, and FIG. 59 is a perspective view of the shutter.

The shutter 4 is made of a thin metal plate, and has two parallel extending flat plates 36, 36 for opening and closing the drive shaft insertion hole 8 and the outer head access port 9 of the outer shell 1, and a base end of the flat plate 36. It has an end face plate portion 37 to be connected, and has a substantially U-shaped side shape as shown in FIG.

複数 A plurality of locking claws 38 extending toward the end face plate 37 are provided near the base end of the flat plate 36. Although not shown, the locking claw 38 is slightly bent inward. As shown in FIG. 57, a notch 39 cut inward is formed at one end of the end face plate portion 37.

60 is a plan view of the slider, FIG. 61 is a front view of the slider, FIG. 62 is a left side view of the slider, FIG. 63 is a right side view of the slider, FIG. 64 is a rear view of the slider, and FIG. 65 is a perspective view of the slider. is there.

The slider 5 includes a shutter supporting portion 41 having a plurality of locking projections 40 with which the distal ends of the locking claws 38 of the shutter 4 abut, and a slider guide portion 11 of the outer case 1 provided inside the shutter supporting portion 41. , A rack portion 43 protruding from the sliding portion 42 on the side opposite to the shutter opening direction, and a spring hook portion 44 provided on the side of the sliding portion 42 opposite to the rack portion 43. Have. As shown in FIG. 61, a shutter opening / closing concave portion 52 is formed on the front surface of the shutter support portion 41.

As shown in FIG. 6, a support shaft 45 is protruded from the second outer shell 7 in the vicinity of the outer-side head access port 9, and a pinion 46 is rotatably supported thereon. The pinion 46 has a first gear 47 having a small diameter and a second gear 48 having a large diameter formed integrally. As shown in FIGS. 66 and 67, the first gear 47 is formed by the rack 43 of the slider 5 and the second gear 48. Each meshes with the arcuate teeth 20 of the inner shell 2.

As shown in FIGS. 66 and 67, one end 49a of the coil spring 49 is locked to the spring hooking portion 44 of the slider 5, and the other end 49b of the coil spring 49 is locked to the spring locking portion 50 of the second outer shell 7. You.

Next, the order of assembling the disk cartridge will be described.
As shown in FIG. 6, the inner shell 2 with the recording disk 3 accommodated inside and the disk pressing member 23 and the C-ring 24 mounted on the upper and lower surfaces is placed on the second outer shell 7. By inserting the positioning projections 12 provided on the second outer shell 7 into the rotation blocking holes 28 provided on the lower disk holding member 23, the lower disk holding member 23 is prevented from rotating. Is positioned.

Further, as shown in FIG. 66, the slider 5, the pinion 46, the coil spring 49, the write protector 51 and the like are set at predetermined positions on the second outer shell 7.

Next, the first outer shell 6 is superimposed on the second outer shell 7, and the positioning protrusion 12 provided on the first outer shell 6 is moved to the rotation preventing hole 28 provided on the upper disc holding member 23. , The upper disc holding member 23 is positioned so as not to rotate. Next, the first outer shell 6 and the second outer shell 7 are fastened with screws to form the outer shell 1.

After that, the shutter 4 is externally fitted toward the outer shell 1 from the free end side of the flat plate portion 36 opposite to the end face plate portion 37 of the shutter 4. In this state, the locking projection 40 of the shutter 4 protrudes from the front end surface of the outer shell 1, so that when the shutter 4 is fitted, the tip of the locking claw 38 provided on the shutter 4 It rides over the locking projection 40 and contacts the inner surface of the locking projection 40. As a result, the shutter 4 is supported by the slider 5, and the assembly of the disk cartridge is completed.

Next, the operation of the disk cartridge will be described.
68 to 72 are views showing the state of the disk cartridge when the shutter is fully closed, FIG. 68 is a plan view of the disk cartridge, FIG. 69 is a front view of the disk cartridge, FIG. 70 is a cross-sectional view taken along line E-E of FIG. FIG. 71 is a cross-sectional view taken along the line F-F of FIG. 68, and FIG. 72 is an enlarged cross-sectional view of the part G of FIG. 70.

73 to 77 are views showing the state of the disk cartridge when the shutter is fully opened. FIG. 73 is a plan view of the disk cartridge, FIG. 74 is a front view of the disk cartridge, FIG. 75 is a cross-sectional view taken along the line HH of FIG. 76 is a cross-sectional view taken along the line I-I in FIG. 73, and FIG. 77 is an enlarged cross-sectional view of the portion J in FIG. 75.

78 to 83 are views for explaining the opening operation of the shutter. FIGS. 78 and 79 are a plan view and a front view showing a state in which the disk cartridge is being inserted into the drive device, and FIGS. 80 and 81 open the shutter. FIGS. 82 and 83 are a plan view and a front view, respectively, showing a state immediately before the shutter is fully opened.

When the drive shaft insertion hole 8 and the outer side head access port 9 of the outer shell 1 are closed by the shutter 4 as shown in FIG. 68, the pinion 46 and the rack portion 43 and the pinion 46 and the arcuate hub 20 are shown in FIG. The inner head access port 16 of the inner shell 2 is completely away from the outer head access port 9 of the outer shell 1 (see FIG. 68).

Therefore, the outer-side head access port 9 is covered by the shutter 4 from the outside and the outer surface of the inner shell 2 from the inside, while the inner-side head access port 16 has a triple occlusion structure covered by the inner surface of the outer shell 1. And has excellent dustproofness.

Also, the protrusion 29 provided on the C-ring 24 rides on the protrusion 2 of the disc pressing member 23, so that the disc pressing member 23 is pressed against the recording disc 3 by the C-ring 24, as shown in FIG. The clamp region corresponding to the inner peripheral portion of the recording disk 3 is sandwiched from both sides by the disk pressing portion 25 of the disk pressing member 23, and the recording disk 3 is fixed.

(4) Therefore, the recording disk 3 can be protected from an external force such as an impact. Although the drive shaft insertion hole 8 of the outer shell 1 is closed by the shutter 4, the disk pressing portion 25 of the disk pressing member 23 is brought into close contact with the clamp area of the recording disk 3 so that the drive shaft insertion hole 8 can be closed. Intrusion of dust can be prevented twice.

(6) By attaching the shutter 4 to the slider 5, as shown in FIG. 69, the notch 39 provided in the shutter 4 exposes the shutter opening / closing recess 52 of the slider 5. Further, a slit 54 is formed on the front surface of the outer shell 1 by combining the first outer shell 6 and the second outer shell 7.

７８ As shown in FIG. 78, two shutter opening members 53a and 53b moving in opposite directions are waiting in the drive device. When the disc cartridge is inserted into the drive device along the direction of arrow K with the end face plate portion 37 of the shutter 4 first, the leading end of one shutter opening member 53a is inserted into the shutter opening / closing recess 52 of the slider 5, and The tip of the other shutter opening member 53b is inserted into the end of the slit 54 of the outer shell 1 (see FIGS. 80 and 81).

When the disk cartridge is further inserted into the drive device, the shutter opening member 53a moves in the direction of arrow La and the shutter opening member 53b moves in the direction of arrow Lb against the elasticity of the coil spring 39.

(4) The slider 5 (shutter 4) is similarly moved in the direction of the arrow La by the movement of the shutter opening member 53a, and the shutter 4 is opened. The movement of the slider 5 causes the pinion 46 to rotate in the direction of arrow M as shown in FIG. 66, and accordingly the inner shell 2 rotates in the direction of arrow N, and the shutter 4 is fully opened as shown in FIGS. 67 and 82. As described above, the inner head access port 16 of the inner shell 2 matches the outer head access port 9. In this state, the optical head can access the upper head access ports 9 and 16, and the floating magnetic head can access the lower head access ports 9 and 16, respectively.

Since the C-ring 24 is connected to the inner shell 2 via the connecting pin 31, the C-ring 24 rotates together with the rotation of the inner shell 2, and the inclined surface 30 of the C-ring 24 and the inclination of the disc holding member 23. The disk holding member 23 is pushed away from the recording disk 3 in cooperation with the surface 27. Since the disc holding member 23 is prevented from rotating by the positioning protrusion 12 of the outer shell 1, even if the inner shell 2 and the C-ring 24 rotate, the disc holding member 23 does not rotate and moves in the axial direction of the positioning protrusion 12. Just do it. As a result, as shown in FIG. 77, the disk pressing portion 25 of the disk pressing member 23 is separated from the recording disk 3, the recording disk 3 is in a free state, and the spindle of the drive device engages with the hub 19 of the recording disk 3. The recording disk 3 is rotated.

When the shutter 4 is opened, the other shutter opening member 53b only moves within the slit 54 of the shutter 4 and does not participate in the opening operation of the shutter 4. When the disc cartridge is of a double-sided recording type and the disc cartridge is turned over and inserted into the drive device, the other shutter opening member 53b is engaged with the shutter opening / closing recess 52, and is involved in the opening operation of the shutter 4. However, only one shutter opening member 53a moves in the slit 54 of the shutter 4.

When the disk cartridge is removed from the drive device, the operation is completely the same as described above. Finally, the drive shaft insertion hole 8 of the outer shell 6 and the outer head access port 9 are closed by the shutter 4 as shown in FIG. Then, the inner shell 2 returns to the position shown in FIG. 66, and the recording disk 3 is sandwiched and fixed from both sides by the disk pressing member 23 as shown in FIG.

で は In the present embodiment, the inner shell 2 and the C-ring 24 are separate bodies, but they may be integrally formed.

In the present embodiment, the shutter 4 and the slider 5 are provided separately, but they may be integrally formed.

ＣIn this embodiment, the C ring 24 is used, but an O ring may be used.

Although the present embodiment has been described with reference to a magneto-optical disk cartridge, the present invention is applicable to other optical disk cartridges and magnetic disk cartridges.

FIG. 2 is a plan view of the disk cartridge according to the embodiment of the present invention. It is a front view of a disk cartridge. It is a left view of a disk cartridge. FIG. 3 is a right side view of the disk cartridge. FIG. 3 is a rear view of the disk cartridge. FIG. 3 is an exploded perspective view of the disk cartridge. It is a top view of a 1st outer shell. It is a front view of a 1st outer shell. It is a left view of a 1st outer shell. It is a right view of the 1st outer shell. It is a rear view of a 1st outer shell. It is a bottom view of a 1st outer shell. It is the perspective view seen from the upper part of the 1st outer shell. It is the perspective view seen from the lower side of the 1st outer shell. It is a top view of a 2nd outer shell. It is a front view of a 2nd outer shell. It is a left view of a 2nd outer shell. It is a right view of a 2nd outer shell. It is a rear view of a 2nd outer shell. It is a bottom view of a 2nd outer shell. It is the perspective view seen from the upper part of the 2nd outer shell. It is the perspective view seen from the lower side of the 2nd outer shell. It is a top view of a 1st inner shell. It is a front view of a 1st inner shell. It is a right view of a 1st inner shell. It is a bottom view of a 1st inner shell. It is the perspective view seen from the upper part of the 1st inner shell. It is the perspective view seen from the lower side of the 1st inner shell. It is a top view of a 2nd inner shell. It is a front view of a 2nd inner shell. It is a right view of a 2nd inner shell. It is a bottom view of a 2nd inner shell. It is the perspective view seen from the upper part of the 2nd inner shell. It is the perspective view seen from the lower side of the 2nd inner shell. FIG. 3 is an exploded perspective view of the inner shell assembly. It is a top view of an inner shell assembly. It is a front view of an inner shell assembly. It is a right view of an inner shell assembly. It is a bottom view of an inner shell assembly. FIG. 39B is an enlarged view of the part A in FIG. 39. FIG. 40B is a cross-sectional view taken along the line BB. It is a top view of an inner shell assembly. It is a bottom view of an inner shell assembly. FIG. 43C is an enlarged view of a portion C in FIG. FIG. 44 is a cross-sectional view taken along the line DD. FIG. 3 is a plan view of a disc holding member. FIG. 4 is a front view of a disc holding member. It is a bottom view of a disc holding member. It is the perspective view which looked at the disk holding member from the upper side. It is the perspective view which looked at the disk holding member from the lower side. It is a top view of a C ring. It is a front view of a C ring. It is a bottom view of a C ring. It is the perspective view which looked at the C ring from the upper side. It is the perspective view which looked at the C ring from the lower side. It is a top view of a shutter. It is a front view of a shutter. It is a left view of a shutter. It is a perspective view of a shutter. It is a top view of a slider. It is a front view of a slider. It is a left view of a slider. It is a right view of a slider. It is a rear view of a slider. It is a perspective view of a slider. FIG. 7 is a perspective view showing a partial state of the inside of the disk cartridge when the shutter is fully closed. FIG. 4 is a perspective view showing a partial state of the inside of the disk cartridge when the shutter is fully opened. FIG. 3 is a plan view of the disk cartridge. It is a front view of a disk cartridge. FIG. 68 is a cross-sectional view taken along the line EE. FIG. 68 is a cross-sectional view of FIG. 68F-F line. FIG. 70G is an enlarged cross-sectional view of the part G. FIG. 3 is a plan view of the disk cartridge. It is a front view of a disk cartridge. FIG. 73 is a cross-sectional view taken along the line HH. FIG. 73 is a cross-sectional view taken along the line II-I. FIG. 75B is an enlarged sectional view of the portion J. FIG. 6 is a plan view showing a state where the disk cartridge is being inserted into the drive device. FIG. 6 is a front view showing a state where the disk cartridge is being inserted into the drive device. It is a top view showing the state just before opening a shutter. It is a front view showing the state just before opening a shutter. It is a top view showing the fully opened state of the shutter. It is a front view showing the fully opened state of the shutter.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Outer shell 2 Inner shell 3 Recording disk 4 Shutter 5 Slider 6 1st outer shell 7 2nd outer shell 8 Drive shaft insertion hole 9 Outer side head access port 10 Outer side bridge part 11 Slider guide part 12 Positioning protrusion 13 First inner Shell 14 Second inner shell 15 Hub insertion hole 16 Inner side head access port 17 Inner side bridge portion 18 Disk accommodation recess 19 Hub 20 Arc-shaped tooth portion 21 Connection hole 22 Connection pin 23 Disk pressing member 24 C ring 25 Disk pressing portion 26 Projecting portion 27 Inclined surface 28 Rotation preventing hole 29 Projecting portion 30 Inclined surface 31 Connecting pin 32 Disk holding member accommodating portion 33 Inclined portion 34 C ring accommodating portion 35 Through hole 36 Flat plate portion 37 End face plate portion 38 Locking claw 39 Notch 40 Locking piece 41 Shutter support part 42 Slide part 43 Rack part 44 Spring hook part 45 Support shaft 46 Pinion 47 First gear 48 Second gear 49 Coil spring 50 Spring locking part 51 Light protector 52 Shutter opening / closing concave parts 53a, 53b Shutter opening member 54 Slit.

Claims (2)

An outer shell having an outer-side head access port,
A shutter for opening and closing the outer side head access port,
An inner shell having an inner side head access port, accommodating a recording disk inside, and rotatably housed in the outer shell;
An inner shell rotating means for rotating the inner shell based on the movement of the shutter,
When the disc cartridge is not used, the inner head access port is located at a position distant from the outer head access port, the outer head access port is closed by a shutter, and the inner head access port is closed by a part of the outer shell. And
When the disc cartridge is used, the outer head access opening is opened by moving the shutter, and the inner head access opening is moved to the position where the inner head access opening coincides with the outer head access opening via the inner shell rotating means by moving the shutter. A disk cartridge characterized in that a shell is rotated. 2. The disk cartridge according to claim 1, further comprising: a disk pressing means interlocked with the rotation of the inner shell;
When the disc cartridge is not used, the recording disc is pressed and fixed by the disc pressing means,
A disc cartridge characterized in that when the disc cartridge is used, the disc pressing means is separated from the recording disc and the recording disc is rotatable.

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