JP2515309Y2 - Disk cartridge case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk cartridge containing a disk-shaped recording medium.

[Prior Art] A disk-shaped recording medium used in a recording / reproducing apparatus is housed in a disk cartridge in order to prevent damage or dust adhesion when not in use. It is protected by An example of such a disc cartridge is shown in FIG. In FIG. 5, reference numeral 101 is an upper half piece 101.
It is a case consisting of a and a lower half piece 101b.
The disk-shaped recording medium 106 is housed in. case 1
01 is provided with a rotation hole 102 for rotating the disk-shaped recording medium 106 and a head insertion hole 103 so that the head can be approached for reading and writing information when the disk cartridge is mounted in the recording / reproducing apparatus. Has been formed.

Here, the case is inserted through the rotation hole 102 and the head insertion hole 103.
A shutter 104 is attached to the case 101 in order to prevent dust from entering the inside of the case 101.

As shown in FIG. 6, the upper half piece 101a is provided with a side wall 107 standing upright on the periphery thereof, and a disc-shaped recording medium 106 is provided inside the side wall 107.
A holding wall 108 for holding the rotation hole 102 in the rotation hole 102 is provided upright. The holding wall 108 partially shares the peripheral side wall 107 in order to make the disc cartridge as compact as possible. Therefore, the end portion 108a of the holding wall 108 is formed integrally with the peripheral side wall 107, and the end portion 108a is formed in a square shape. Further, although not shown, the lower half piece 101b is also formed with the peripheral side wall and the retaining wall similar to the above.

[Problems to be solved by the device]

However, in the case of such a conventional disc cartridge, since the disc-shaped recording medium 106 housed in the holding wall 108 is rotated by the spindle motor (not shown), the disc-shaped recording medium is
It is necessary to provide a gap between the holding wall 108 and the holding wall 108, and the disc-shaped recording medium 106 is loose in the holding wall 108 when carrying a disc cartridge. When the disc-shaped recording medium 108 rattles, the disc-shaped recording medium 106 contacts the end portion 108a of the holding wall 108. Since the end portion 108a is formed into a square shape, the stress at the contact at the end portion 108a is large. When the disk-shaped recording medium 106 comes into contact with the end portion 108a for a long time, the large stress is repeatedly applied to the end portion 108a, and the end portion 108a becomes fatigued. Therefore, there is a risk that the end portion 108a of the holding wall 108 will eventually be cracked and the case of the disk cartridge will be unusable. On the other hand, there is a possibility that cracks may occur in the outer peripheral portion of the disc-shaped recording medium.

[Means for solving the problem]

In order to solve such a problem, according to the present invention, the peripheral side wall 7 of the case for accommodating the disc-shaped recording medium 2 is
In the case 1 of the disk cartridge in which the substantially circular holding walls 9 and 10 that surround the outer peripheral side of the disk-shaped recording medium 2 are formed inside 8, the holding walls 9 and 10 are the peripheral side walls.
7 and 8 share a part thereof, and the end portions 9a and 10a formed at positions where the holding walls 9 and 10 intersect the peripheral side walls 7 and 8 are formed on the outer peripheral side of the disc-shaped recording medium 2. It is configured to have a rounded wall that is curved in a convex shape.

[Action]

When the disc-shaped recording medium rattles, the disc-shaped recording medium comes into contact with the end portion of the holding wall. Since the end is rounded, the stress at the time of contacting the end is smaller than in the conventional case. Therefore, even if the disc-shaped recording medium comes into contact with the end portion and the stress is repeatedly applied to this end portion, the end portion is not fatigued and the outer peripheral portion of the disc-shaped recording medium is not damaged.

〔Example〕

 Hereinafter, the present invention will be described with reference to the drawings.

1 to 4 are views showing an embodiment of a disk cartridge according to the present invention.

In FIG. 1, reference numeral 1 is a case of a disk cartridge, and this case 1 is made of synthetic resin and is composed of an upper half piece 1a and a lower half piece 1b of a rectangular flat plate-like casing. A 3.5-inch optical disc 2 (disc-shaped recording medium) in which optical information is recorded is housed in the case 1. A rotation hole 11a for rotating the optical disk 2 in the case 1 by a spindle motor (not shown) when the optical disk 2 is mounted in the recording / reproducing apparatus is provided in the center of the upper and lower half pieces 1a, 1b of the case 1. , 11b are formed, and a hub portion (not shown) provided at the center of the optical disc 2 is exposed from the rotation holes 11a, 11b. Head insertion holes 12a, 12b are formed in the upper and lower halves 1a, 1b of the case 1 so that an optical head (not shown) for reading information recorded on the optical disk 2 can be approached.

When the optical disk 2 is not used, the rotating hole 11a,
In order to prevent dust from entering the case 1 through the 11b and the head insertion holes 12a, 12b, the case 5 has a shutter 5
Is installed. The shutter 5 is formed by bending a thin metal plate made of stainless steel or the like into a substantially U-shape from approximately the center, and is constantly biased in the closing direction by a torsion coil spring 6.

Further, the upper half piece 1a and the lower half piece 1b, which form the case 1 as a whole are substantially rectangular, are provided with peripheral side walls 7 and 8 which mate with each other as shown in FIGS. Inside the peripheral side walls 7 and 8, holding walls 9 and 10 for holding the optical disc 2 at the positions of the rotation holes 11a and 11b and accommodating the optical discs 2 are erected in a circular shape as a whole, respectively. 10 are also mutually matched.

Here, if the holding walls 9 and 10 are formed on the inner side of the peripheral side walls 7 and 8 over substantially the entire circumference, the peripheral side walls 7 and 8 located on the outer side must be formed to be slightly larger, and the disk cartridge as a whole. It gets bigger. Therefore, in order to make the disc cartridge compact, the holding walls 9, 10 are
It is a form of sharing a part of 8. Because of this, the retaining wall
The end portions 9a, 10a of 9, 10 are connected to the peripheral side walls 7, 8 and are integrally formed. That is, when a part of the end portion 10a of the holding wall 10 is enlarged and shown in FIG. 4, this end portion 10a is bent to form a peripheral side wall.
It is formed integrally with 7, 8 and the bent end 10a is rounded. The holding walls 9 and 10 may be formed apart from the peripheral side walls 7 and 8 without being connected to the peripheral side walls 7 and 8. Also, ribs 13 are provided on the periphery of the rotating holes 11a and 11b of the upper and lower half pieces 1a and 1b.
a and 13b are formed.

By the way, when the disk cartridge is mounted in the recording / reproducing apparatus, the optical disk 2 housed in the case 1 is rotated by the spindle motor, so that a gap is provided between the holding walls 9 and 10. For this reason, when carrying a disc cartridge, the optical disc 2 should have a holding wall.
The inside of 9, 10 was loose. When the optical disk 2 rattles, the optical disk 2 comes into contact with the ends 9a and 10a of the holding walls 9 and 10. Since the end portions 9a, 10a are rounded, the stress at the time of the abutting at the end portions 9a, 10a is smaller than in the conventional case. For this reason, the optical disk 2 is at the end
Even if the stress is repeatedly applied to the end portions 9a, 10a by coming into contact with the end portions 9a, 10a, the end portions 9a, 10a do not fatigue.
Therefore, unlike the conventional case, the ends 9a and 10a are not cracked, and the case of the disk cartridge is not disabled. On the other hand, cracks do not occur on the outer peripheral portion of the optical disc.

[Effect of device]

As described above, according to the present invention, since the holding wall of the case of the disk cartridge shares a part of the peripheral side wall, the case can be made compact, and the end of the holding wall of the case caused by it can be Since the rounded wall which is convexly curved with respect to the outer peripheral side of the disk-shaped recording medium, even if the disk-shaped recording medium comes into contact with this end, no unreasonable force is applied to the end and the disk-shaped recording medium. There is no possibility of cracks on the outer periphery of the.

[Brief description of drawings]

1 to 4 are views showing an embodiment of a case of a disk cartridge according to the present invention. FIG. 1 is a perspective view of the case, and FIGS. Perspective view of half and lower half, FIG. 4 shows third
FIG. 4 is an enlarged view of a part viewed from the arrow IV in the figure. 5 and 6
FIG. 5 is a view showing a case of a conventional disc cartridge, FIG. 5 is a perspective view of this case, and FIG. 6 is a perspective view of an upper half piece of this case. 1 ... Case, 1a ... Upper half piece, 1b ... Lower half piece, 2 ... Optical disk, 9,10 ... Retaining wall, 9a, 10a ... End part.

Claims (1)

(57) [Scope of utility model registration request] 1. A disc in which a substantially circular holding wall 9, 10 is formed inside a peripheral side wall 7, 8 of a case for accommodating the disc-shaped recording medium 2 so as to surround the outer peripheral side of the disc-shaped recording medium 2. In the case 1 of the cartridge, the holding walls 9 and 10 share a part of the peripheral side walls 7 and 8, and ends formed at positions where the holding walls 9 and 10 intersect the peripheral side walls 7 and 8. Part 9a, 10a
Is a case of a disc cartridge, which is a rounded wall which is convexly curved with respect to the outer peripheral side of the disc-shaped recording medium 2.