JP2560009Y2 - Disk 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 disk cartridge in which an information recording medium such as an optical disk or a magneto-optical disk is housed in a shell.

[0002]

2. Description of the Related Art Generally, optical disks, magnetic disks or magneto-optical disks are widely known as disks for recording and / or reproducing information signals.

Conventionally, in order to prevent the attachment of dust to the disk surface and the damage caused by the contact of fingers, this type of disk has been provided with an upper and lower disk as shown in FIG. Two halves 1,2
So-called disk cartridge D which is rotatably housed inside
Has been adopted as.

At the center of the lower half 2 of the upper and lower halves 1 and 2 of the disk cartridge D, there is provided a chucking opening 3 that opens inside and outside the half. Also, both halves 1 and 2 of the disc cartridge D
At least one half 2 of the two has a recording / reproducing opening 4 for exposing a part of the disk to the outside during use. The half 2 of the disk cartridge D is provided with a shutter 5 for closing the recording / reproducing opening 4 when not in use in order to prevent dust from entering both halves and protect the disk. I have.

By the way, this kind of disk cartridge is provided with an elevation 7 for protecting the disk surface of the disk 6 as shown in FIG. The elevation 7 is provided integrally on the inner end surfaces of the halves 1 and 2, and is configured to hold the inner peripheral edge (non-recording area) of the disk 6.

[0006]

However, in the conventional disk cartridge, since the elevation 7 has a structure that holds only the inner peripheral edge of the disk 6, the disk 6 flexes when not in use and the outer peripheral edge is raised. It was held at a site other than. As a result, the recording area of the disk 6 comes into contact in the two halves 1 and 2 when the cartridge is transported or the cartridge is inserted into or removed from the disk player, or foreign matter E is sandwiched between the disk 6 and the inner end surfaces of the halves 1 and 2. As a result, the disk 6 is damaged.

The present invention has been made in view of such circumstances, and can prevent contact of a disk with a half and pinching of foreign matter between the half and the disk, thereby preventing damage to the disk. A disk cartridge is provided.

[0008]

SUMMARY OF THE INVENTION A disk cartridge according to the present invention includes an annular disk having a non-recording area rotatably housed in a shell and extending in the circumferential direction at its inner and outer peripheral edges. An elevation held in a use state is provided in the shell, and the elevation is provided between two non-recording areas of the disk and the inner end face of the shell and between two non-recording areas of the disc and the inner end face of the shell. It is composed of the options.

[0009]

According to the present invention, the disk can be held in the shell in a non-contact state by the two sets of elevations.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction and the like of the present invention will be described below in detail with reference to embodiments.

FIGS. 1A and 1B are sectional views showing a chucking state and a non-chucking state of a disk cartridge according to the present invention.

In FIG. 1, reference numeral 11 denotes a shell for a disk cartridge, which is composed of upper and lower halves 12, 13 which are fitted with each other and are made of a synthetic resin material such as ABS, for example. For example, it is formed of a substantially rectangular casing in plan view having a main surface of about 68 mm to 72 mm in length and width. At the center of the lower half 13 of the shell 11, there is provided an opening window 15 through which a turntable 14 for a disk player having a disk suction surface 14a can be inserted and withdrawn.

The upper and lower halves 12 and 13 constituting the shell 11 are provided with long holes (not shown) extending from the center of the disk toward the outer periphery. Optical head (not shown) when opening (not shown)
Alternatively, an information signal is recorded on a magneto-optical disk described later by a magnetic head (not shown).

Reference numeral 16 denotes a magneto-optical disk having a circular shape in plan view.
It is rotatably accommodated in the shell 11, and is entirely formed of a synthetic resin material such as polycarbonate. The magneto-optical disk 16 is formed in an annular shape by opening a through hole 17 at the center in the axial direction of the disk, and has a diameter of about 64 mm. On the inner and outer peripheral edges of the optical disc 16,
Two non-recording areas 16a and 16b extending in the circumferential direction and a recording area 16c interposed between the two non-recording areas 16a and 16b are formed.

The through hole 1 of the magneto-optical disk 16
An annular protrusion 18 is provided integrally with the periphery of the opening on the chucking side of 7. Inside the protrusion 18, an anti-chucking side end surface 1 parallel to the disk surface of the magneto-optical disk 16 is provided.
An inner flange 19 having 9a is provided integrally.
Thus, the inner hole of the inner flange 19 is provided on one side of the optical disk 16 opposite to the surface facing the optical head (not shown), that is, the surface facing the inner end surface of the upper half 12. A recess 20 communicating with 19b is formed.

Reference numeral 21 denotes a lower first elevation having a front end surface facing the lower surface of the inner non-recording area 16a of the non-recording areas 16a and 16b, and is provided integrally with the inner peripheral edge of the opening window 15. I have.

Reference numeral 22 denotes an upper first elevation having a tip end surface facing the upper surface of the inner non-recording area 16a.
An inner end surface (half main surface) of the upper half 12 is provided integrally with a portion facing the front end surface of the lower first elevation 21 via the magneto-optical disk 16.

Reference numeral 23 denotes a lower second elevation having a front end face facing the lower surface of the outer non-recording area 16b of the non-recording areas 16a and 16b, and is integrated with the inner end face (half main face) of the lower half 13. It is provided in.

Reference numeral 24 denotes a second upper elevation having a tip end surface facing the upper surface of the outer non-recording area 16b.
An inner end surface (half main surface) of the upper half 12 is provided integrally with a portion facing the front end surface of the lower second elevation 23 via the magneto-optical disk 16.

The upper and lower second elevations 23, 24
The heights of the upper and lower first elevations 21 and 22 are set to approximately 0.1 mm by an annular body protruding toward the main surface of the magneto-optical disk 16. Magneto-optical disk 1
6 is held.

Numeral 25 denotes a disk pressing plate having a through hole 25a at the center thereof.
The inner flange 19 is held on the end surface 19a on the anti-chucking side of the inner hole 19b of the inner flange 19, and a sheet metal made entirely of a magnetic material is subjected to drawing or the like to form a U-shape in cross section and a circular shape in plan view. Is formed.

Reference numeral 26 denotes a spindle motor for driving the turntable 14 to rotate, and reference numeral 27 denotes an output shaft of the spindle motor 26.

The turntable 14 has a magnet 14b for attracting the disc holding plate 25 via the inner flange 19, and is fixed to the output shaft 27.

In the disk cartridge constructed as described above, the magneto-optical disk 16 is recorded in the shell 11 by the inner and outer two sets of elevations, ie, the first upper and lower elevations 21 and 22 and the second upper and lower elevations 23 and 24. 16c can be held in a non-contact state, so that when the cartridge is transported or when the cartridge is inserted into and removed from a disk player (not shown), the recording area 16c contacts the shell 11 and foreign matter generated by the magneto-optical disk 16 and the halves 12 and 13 is removed. Can be prevented from being pinched.

In this embodiment, the upper and lower first elevations 21 and 22 and the upper and lower second elevations 2 and 2 are used.
An example in which 3, 24 are continuously formed by an annular body is shown.
The present invention is not limited to this, and may be formed intermittently in the circumferential direction.

In this embodiment, the upper and lower first elevations 21 and 22 and the upper and lower second elevation 2
Although an example is shown in which the halves 12 and 13 are integrally formed with the halves 12 and 13, the present invention provides that the halves 12 and 13 include upper and lower first elevations 21 and 22 and upper and lower second elevations 23 and 2.
Of course, 4 may be attached.

Further, in this embodiment, the half 1
2 and 13 are provided with the elevations 21 to 24, but the present invention is not limited to this.
Even when two sets of inner and outer elevations are provided in the 6 non-recording areas 16a and 16b, the same effect as that of the embodiment can be obtained.

Further, in this embodiment, an example has been shown in which the main surfaces of the halves 12 and 13 are formed as flat surfaces. However, in the present invention, when the disk is not used, the magneto-optical disk 16 does not cover the recording area 16c. As long as the structure is held in a contact state, the main surfaces of the halves 12 and 13 may be formed as curved surfaces R as shown in FIG. 2, for example. in this case,
Reference numerals 31 and 32 are elevations.

In addition, in the present invention, various modifications and changes are possible based on the technical idea of the present invention without being limited to the above-described embodiment.

[0030]

As described above, according to the present invention, an annular disk having a non-recording area rotatably accommodated in a shell and extending in the circumferential direction on its inner and outer peripheral edges is provided. The elevation held in the state is provided in the shell, and the elevation is provided between two non-recording areas of the disk and the inner end face of the shell and between two non-recording areas of the disc and the inner end face of the shell. Therefore, the disk can be held in the shell in a non-contact state by the two sets of elevations in the shell.

Therefore, it is possible to prevent contact of the recording area with the shell and pinch of foreign matter between the disk and the shell when the cartridge is transported or when the cartridge is inserted into or removed from the disk player, so that damage to the disk can be prevented.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views showing a chucking state and a non-chucking state of a disk cartridge according to the present invention.

FIG. 2 is a local sectional view showing another embodiment.

FIG. 3 is a perspective view showing a conventional disk cartridge.

FIG. 4 is a local sectional view showing a conventional disk cartridge.

[Explanation of symbols]

11: shell, 12: upper half, 13: lower shell,
16: magneto-optical disk, 16a, 16b: non-recording area,
16c: recording area, 21: upper first elevation, 2
2. Lower first elevation, 23 Upper second elevation, 24 Lower second elevation.

Claims (1)

(57) [Scope of request for utility model registration] 1. An annular disk having a non-recording area rotatably housed in a shell and extending in a circumferential direction at an inner and outer peripheral edge thereof, and an elevation for holding the disk in a non-use state is provided in the shell. Wherein the elevation is constituted by two sets of elevations interposed between the inner non-recording area of the disk and the inner end face of the shell and between the outer non-recording area of the disc and the inner end face of the shell. Disc cartridge.