JP3480220B2 - Disk storage cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc storage cartridge for storing a disc for storing information such as a CD (compact disc) , and more particularly to a caddy.
Type disk storage cartridge .

[0002]

2. Description of the Related Art There are a tray type and a caddy type as methods for setting a CD on a reproducing or recording / reproducing apparatus such as a player.

In the case of a tray type player, the tray is pulled out to the outside of the player, the disc taken out from the cartridge is placed on the tray, the tray is retracted into the player for reproduction, and after the reproduction is finished, the tray is taken out of the player. Stick out the disc on the tray and insert it into the cartridge.

In the case of the caddy type, the disc is housed in a cartridge and the whole disc is loaded into a reproducing or recording / reproducing apparatus.

FIG. 2 (a) is a schematic perspective view of a conventional caddy type cartridge, and FIG. 2 (b) is the same (a).
FIG. 3 is a sectional view taken along line BB in FIG. 3, and FIG. 3 is a sectional view showing a state where the disc is held on the turntable of the reproducing apparatus.

The cartridge 10 comprises a cartridge body (lower case) 12 and a lid (upper case) 14 rotatably attached to the cartridge body 12. The cartridge body 12 is provided with a recess 18 for accommodating the disk 16, and an opening 22 for passing the turntable 20 is provided in the center thereof. An opening 24 for reproduction or recording is provided so as to be continuous with the opening 22 and reach the side of the cartridge body 12.

An outer peripheral step portion 18a and an inner peripheral step portion 18b for supporting the outer peripheral edge portion and the inner peripheral edge portion of the lower surface of the disk 16 are provided at the outer peripheral portion and the inner peripheral portion (the edge portion of the opening 22) of the concave portion 18. Is provided.

A shutter 26 is attached to the openings 22 and 24 so as to be slidable in the cartridge width direction.
The shutter 26 is biased by a spring (not shown) so as to assume an opening closing posture.

An opening 32 for mounting the stabilizer 30 is provided in a central portion of the lid body 14, and a peripheral wall 33 is erected from the edge portion of the opening 32 toward the disk 16. From the tip end side in the standing direction of the peripheral wall 33, the opening 32 is formed.
A holding portion 34 of the stabilizer 30 is provided so as to project inward. The holding portions 34 are projecting pieces, and a plurality of holding portions 34 are provided at predetermined intervals in the circumferential direction of the opening 32.

The stabilizer 30 is substantially disk-shaped, and a thin plate-shaped flange 36 projecting from the outer periphery in the form of a brim is engaged with the stabilizer holding portion 34. A cap 38 is fixed to the opening 32.

A magnetic material 40 such as an iron piece is integrally provided on the stabilizer 30.

It should be noted that 1 is provided at both ends of the lid body 14 on the side of the rotation base end.
A pair of standing pieces 42 are provided, and the cartridge body 1
The upright piece 42 is rotatably supported with respect to the second support piece 44, whereby the lid 14 is rotatably attached to the cartridge body 12.

A claw portion 48 is provided on the front end side of the lid 14 for rotation, and the claw portion 48 is locked to the flexible piece portion 50 of the cartridge body 12. When the knobs 52, 52 connected to the flexible piece 50 are pressed, the flexible piece 50 and the claw 48 are pressed.
The engagement with and is released, and the lid 14 can be opened.

As shown in FIG. 3, the turntable 20 is attached to a rotary shaft 52a of a disk drive motor 52. This turntable 20 has a magnet 54
Is provided to attract the magnetic body 40.

Cartridge 10 containing disk 16
When the disk is inserted into the reproducing device, the turntable 20 rises and the convex hub portion 56 of the turntable 20 enters the center hole 16a of the disc 16. Then, the magnet 54 attracts the magnetic body 40, so that the stabilizer 3
The disk 16 is sandwiched between 0 and the turntable 20, and the disk 16 is fixed to the turntable 20.

The outer peripheral stepped portion 18a and the inner peripheral stepped portion 18b described above.
Prevents the wide area (especially the recording area) of the lower surface of the disk 16 from hitting the upper surface of the concave portion 18 and causing scratches or dust generation.

[0017]

A conventional CD-ROM caddy (cartridge) is provided with an outer peripheral step portion 18a and an inner peripheral step portion 18b only on the cartridge body side.
This is because it is not supposed to put the disc in the cartridge for transportation / sale, and it is only necessary that the recording area on the bottom of the disc does not hit the inner surface of the cartridge when the disc is put in the cartridge for recording / playback. It was because it had been.

However, in recent years, there is an increasing demand for transportation / sale with a CD-ROM in a caddy cartridge. In such a case, the disc may flutter in the cartridge in the direction perpendicular to the disc plate surface even during transportation, and the disc upper face may hit the inner face of the caddy cartridge, which may cause scratches or dust generation. .

Burrs during molding may remain on the outer peripheral edge of the disk, and dust is particularly likely to be generated when it hits the lid.

Since a reflective layer is provided on the upper surface of the CD-ROM, if the reflective layer is damaged, the CD-
An error easily occurs in recording / reproducing of the ROM.

In particular, a recordable CD (CD-R) has poor adhesion between the reflection layer and the dye layer, and is easily peeled off when the reflection layer is damaged.

In the conventional cartridge shown in FIGS. 2 and 3, when the disc flaps, the peripheral wall 33 or the holding portion 34 contacts the inner peripheral edge of the upper face of the disc 16, so that the inner peripheral side of the disc upper face is covered. Although it did not hit the body 14, there was a risk that the outer peripheral side of the upper surface of the disk would hit the lid 14 including the outer peripheral edge and the recording area.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a disk storage cartridge improved so as to protect the outer peripheral side of the upper surface of the disk.

[0024]

Disc storage cartridge of the present invention In order to achieve the above object, according to chromatic and a lid that covers the cartridge body and the cartridge body, consisting of a circular plate-shaped molded disk
Key that is loaded into the playback or recording / playback device with the
A caddy-type cartridge, wherein the cartridge body is provided with a concave portion for accommodating the disc, and the concave portion has an inner peripheral step portion for supporting an inner peripheral edge portion of the lower surface of the disc and an outer peripheral edge of the lower surface of the disc. In a cartridge for storing a disk provided with an outer peripheral step portion that supports a portion, the lid body faces the non-recording area on the outer periphery of the upper surface of the disk.
Along with the boundary between the recording area and the non-recording area of the disc
The outer peripheral side of the disk and the inner peripheral side of the outer peripheral edge of the disk
Is provided with a convex portion located in the disk radial direction of the convex portion
The width is 0.2 to 2 mm .

In such a disc storage cartridge, when the disc flaps, the convex portion provided on the lid body forms a recording region and a non-recording region in the outer peripheral edge portion of the disc upper surface.
On the outer peripheral side of the boundary of and on the outer peripheral edge of the disc
Since it hits the inner peripheral side , the outer peripheral edge of the disc upper surface and the recording area are prevented from hitting the inner surface of the lid, and dust and scratches on the recording area on the upper surface are prevented.

In the present invention, the lower surface of the disk is the lower surface of the disk when the cartridge body is on the lower side and the lid is on the upper side, and the upper surface of the disk is the surface opposite to the lower surface of the disk.

[0027]

1 (a) and 1 (b) show a disk accommodating cartridge according to an embodiment. Note that FIG. 1B is a cross-sectional view of the main part of the lid 14 taken along the line BB of FIG.

The cartridge 10A used in this embodiment is different from the conventional cartridge 10 in that the lid 14 is provided with a convex portion 60 that abuts against the outer peripheral edge portion of the upper surface of the disk 16. Is the same as that of the cartridge 10, and the same reference numerals indicate the same parts.

Cartridge 10A for storing the disk
In the case of the disc 1,
No part of the upper surface of the recording area of 6 hits the inner surface of the lid body 14, so that the upper surface of the recording area of the disc 16 is reliably prevented from being scratched. In addition, dust generation due to contact between the convex portion 60 and the disc 16 can be almost eliminated.

The top surface of the convex portion is preferably smooth to some extent in order not to damage the disc, but may be as smooth as other portions of the lid, for example. On the contrary, in order to reduce the coefficient of friction with the disk, roughening such as graining may be performed on the top surface of the convex portion.

The convex portion 60 is provided at a position where it contacts only the outer peripheral non-recording area of the disk 16 and does not contact the recording area.

Further, since the disk 16 is accommodated in the recess 18, the protrusion 60 need not be provided on the outer peripheral side of the peripheral edge of the recess 18.

In the present invention, the convex portion 60 is provided at a position where it does not contact the outer peripheral edge of the disk. In this case, since the outer peripheral edge of the disc does not come into contact with the cartridge lid at all, dust generation is significantly suppressed.

The above position is determined in consideration of the rattling of the disk in the cartridge in the radial direction. That is, the disc has Δd (Δd = (diameter of the concave portion 18) −
(Disk diameter)) rattles in the radial direction. Therefore, in order to avoid contact with the recording area, it is necessary to provide the protrusion 60 on the outer peripheral side by Δd from the boundary between the recording area and the outer peripheral non-recording area.

Similarly, in order to avoid contact with the outer peripheral edge,
It is necessary to provide the protrusion 60 on the inner peripheral side by Δd from the outer peripheral end.

The contact width between the convex portion 60 and the disc 16 (width in the radial direction of the disc 16) is preferably 0.2 to 2 mm.
Gu Ru 0.3~1mm der. When the contact width is too narrow, since the easily or dust or scratch the disk Conversely, contact
Sawahaba is Ri der more than 0.2mm, preferably 0.3mm or more.

Further, the contact width is 2 mm or less , preferably 1 mm or less , in order to avoid contact with the outer peripheral edge of the disk. The height of the convex portion 60 is preferably equal to or smaller than the height of the peripheral wall 33. However, the height of the convex portion is preferably 0.1 mm or more, and particularly preferably 0.2 mm or more.

In FIGS. 1 (a) and 1 (b), the convex portion 60 is provided in a ring shape which is continuous in the circumferential direction, but it may be partially interrupted or provided intermittently.

The above-mentioned convex portion 60 has a rectangular cross section as shown in FIG. 1 (b), but various sectional shapes such as trapezoidal like the convex portion 60 'in FIG. 1 (c). It can be shaped. The corners of the protrusions 60 and 60 'may be rounded.

[0040]

As described above, the disk storage cartridge of the present invention is a caddy type cartridge.
The convex portion provided on the lid prevents the recording area on the upper surface of the disc from hitting the inner surface of the lid.
It is possible to reliably prevent the recording area on the upper surface of the disc from being scratched. Further, it is possible to significantly reduce dust generation due to contact between the upper surface of the disc and the lid.

[Brief description of drawings]

FIG. 1 is a perspective view and a cross-sectional view of a main part of a cartridge according to an embodiment.

FIG. 2 is a perspective view of a conventional cartridge.

FIG. 3 is a cross-sectional view of a conventional caddy type cartridge during recording or reproduction.

[Explanation of symbols]

10,10A cartridge 12 Cartridge body 14 Lid 16 discs 16a central hole 18a outer peripheral step 18b Inner peripheral step 22, 24, 32 openings 30 Stabilizer 33 Perimeter wall 34 Stabilizer holder 60, 60 'convex

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-229674 (JP, A) Actually open 60-177087 (JP, U) Actually open 63-168675 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) G11B 23/03 603

Claims (2)

(57) [Claims] [Claim 1] possess a lid that covers the cartridge body and the cartridge body, play while accommodating a disk made of a disk-shaped compact or
A caddy type cartridge to be loaded in a recording / reproducing apparatus , wherein the cartridge main body is provided with a concave portion for accommodating the disc, and the concave portion has an inner peripheral step portion for supporting an inner peripheral edge portion of the lower surface of the disc. A disc accommodating cartridge provided with an outer peripheral step portion that supports an outer peripheral edge portion of a lower surface of the disc, the recording medium of the disc, the lid body facing the non-recording area of the outer periphery of the upper surface of the disc. Boundary between area and non-recorded area
On the outer peripheral side of the boundary and inside the outer peripheral end of the disk
A protrusion located on the circumferential side is provided , and the width of the protrusion in the disk radial direction is 0.2 to 2 mm.
A disc storage cartridge characterized by the fact that Wherein Oite to claim 1, the disc accommodating cartridge the convex portion and being provided with circulation.