JPH0513352B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a disk cartridge having a rotatable disk-shaped recording medium and a slidable shutter, and which can be attached to and detached from a recording/reproducing apparatus, and particularly relates to this disk cartridge. The present invention relates to a structure for preventing deformation of a shutter provided therein.

[Background technology]

FIG. 1 is a plan view showing the appearance of a conventional disk cartridge. In this figure, reference numeral 1 denotes a cartridge case, which consists of an upper case and a lower case that are provided separately.A disk (not shown) is placed in a storage space formed by overlapping these upper and lower cases. A storage medium such as an optical disk is stored therein. This cartridge case 1 has a spindle hole 1a into which a spindle for rotating the optical disk can be inserted, and a head insertion hole 1b into which a recording/reproducing head for recording information on the optical disk or reading information from the optical disk can be inserted. is formed. Reference numeral 2 denotes a shutter attached to the cartridge case 1, which is U-shaped when viewed from the side, and has a spindle hole 1a and a head insertion hole 1b formed on both the front and back sides of the cartridge case 1. can be opened and closed at the same time. This shutter 2 has a flat portion 1 located on the side of the head insertion hole 1b of the cartridge case 1.
c, and the guide portion 1 located on the spindle hole 1a side.
d, and when the disk cartridge is attached to or detached from a recording/reproducing device (not shown), the arrow 3
It can be slid in the direction of. Reference numeral 1e denotes a recessed portion, on which a label is attached that describes, for example, the name of the information recorded on the optical disc, a summary of the contents, and the like.

In the disk cartridge configured as described above, the shutter 2 slides on the flat portion 1c and the guide portion 1d in the direction of the arrow 4, for example, as the disk cartridge is attached to a recording/reproducing device (not shown), and thereby the spindle Hole 1a and head insertion hole 1b are opened, and the spindle can be inserted into spindle hole 1a and the head can be inserted into head insertion hole 1b. information can be read. Further, as the shutter 2 is removed from the recording/reproducing apparatus, it slides in the direction of the arrow 5, thereby closing the spindle hole 1a and the head insertion hole 1b. This prevents dust and other foreign matter from entering the case 1, thereby preventing foreign matter from adhering to the optical disc.

However, in the case of the above-mentioned conventional disk cartridge, a metal plate made of stainless steel or the like is bent into a U-shape as the shutter 2, so the rigidity of the shutter 2 is low. When a force is applied to the disk cartridge, it is easily deformed, which impairs the smoothness of attaching and removing the disk cartridge to the recording/reproducing apparatus, and in the worst case, making it impossible to attach and detach the disk cartridge to the recording/reproducing apparatus. In addition, since the rigidity is low, when the disk cartridge is attached to a recording/reproducing device (not shown), the shutter 2 is elastically deformed by the pressing force acting on the shutter 2, and the side edge 2a of the shutter 2 is curved. It has the disadvantage that it engages with the surface of the flat portion 1c of the storage case 1 and the sliding surface of the guide portion 1d and is easily scraped off. When the shutter 2 engages with the cartridge case 1, these chips enter through the spindle hole 1a and the head insertion hole 1b and adhere to the optical disk, causing the shutter 2
The problem arises that the provision of the optical disk actually promotes the adhesion of dust to the optical disk.

[Purpose of the invention]

The present invention has been made in view of the actual state of the prior art, and its purpose is to have excellent strength and durability, and to suppress the generation of chips on the case due to the sliding movement of the shutter. Our objective is to provide disk cartridges.

[Summary of the invention]

In order to achieve the above object, the present invention provides a cartridge case comprising an upper case and a lower case and having a spindle hole and a head insertion hole, and a disk-shaped cartridge case rotatably housed inside the cartridge case. In a disk cartridge comprising a recording medium and a shutter which can open and close both the spindle hole and the head insertion hole and which is slidable with respect to the cartridge case, the spindle hole and the head insertion hole of the shutter are opened and closed. on the face,
A deformation prevention protrusion extending in the longitudinal direction or diagonal direction of the surface was provided.

〔Example〕

Hereinafter, the disk cartridge of the present invention will be explained based on the drawings.

2 to 4 are explanatory diagrams of one embodiment of the present invention, in which FIG. 2 is a plan view showing the external appearance of a disk cartridge, FIG. 3 is a sectional view taken along line AA in FIG.
FIG. 4 is an exploded perspective view of the disk cartridge.

In these figures, 10 is a cartridge case made of, for example, hard synthetic resin;
As shown in the figure and FIG. 4, it consists of an upper case 10a and a lower case 10b, and has a spindle hole 10c in the center into which a spindle of a recording/reproducing device (not shown) can be inserted, and a recording/reproducing head can also be inserted therein. It has a head insertion hole 10d. Symbols 10g and 10h are flat parts of the upper case 10a and lower case 10b, and 10i and 10j
are recesses provided in the upper case 10a and the lower case 10b, on which a label or the like describing, for example, the name of the information to be recorded on the optical disk 11, a summary of the contents, etc., is pasted. Reference numeral 11 denotes a disk-shaped recording medium, for example, an optical disk on which information is optically recorded, and includes a wall portion 10e formed in a circular shape on the inner surface of the upper case 10a, and a wall formed in a circular shape on the inner surface of the lower case 10b. It is arranged in a space formed inside the portion 10f. Reference numeral 12 denotes a U-shaped shutter that is slidably attached to the cartridge case 10, and includes an upper case 10a and a lower case 10b.
A spindle hole 10c and a head insertion hole 10d formed in the cartridge case 10 can be opened and closed, and the cartridge case 10 can be slid in the direction of an arrow 13 perpendicular to the direction in which the cartridge case 10 is inserted into the recording/reproducing apparatus. 12
Denoted at 12d are protrusions protruding along both side edges 12b of the shutter 12 to prevent deformation. It will be installed protrudingly. These protrusions 12c, 12d
As shown in FIG. 3, it has a hemispherical cross-sectional shape and is protruded at a height that does not impede smooth sliding between the shutter 12 and the cartridge case 10. 14
a is a guide portion that guides the tip portion 12a of the shutter 12, and includes an upper case 10a and a lower case 10.
b are integrally attached to each other.

In the disk cartridge configured as described above, the shutter 12 is moved to the cartridge case 10 when the disk cartridge is attached to a recording/reproducing device (not shown).
For example, the spindle hole 10c and the head insertion hole 10d are opened, and the spindle is inserted into the spindle hole 10c and the head insertion hole is opened. 10d can be inserted into the recording/reproducing head, and the stored optical disk 1 can be inserted into the recording/reproducing head.
It becomes possible to read information from 1. In addition, when the shutter 12 is disconnected from the recording/reproducing device,
slides in the direction of arrow 16, thereby closing the spindle hole 10c and the head insertion hole 10d, and as in the conventional case, the case 1 is removed from the spindle hole 10c and the head insertion hole 10d when not in use.
As a result, the adhesion of dust and the like to the optical disk 11 is prevented.

In this case, the shutter 12 is
d, the shutter 12 has high rigidity and hardly undergoes elastic deformation;
and a protrusion 1 protruding from the inner surface of the shutter 12
2c and 12d slide on the flat parts 10g and 10h of the cartridge case 10, and the side edge 12b of the shutter 12 does not directly interfere with the cartridge case 10. The generation of chips on the cartridge case 10 can be suppressed. Further, the disk cartridge according to the embodiment shown in FIGS. 2 to 4 has a cartridge case 10 and a shutter 12.
Since the gap between the two is almost completely sealed by the protrusions 10c and 10d, it is also effective in preventing the intrusion of foreign matter.

5 to 8 are explanatory diagrams showing another embodiment of the present invention, in which FIGS. 5 to 7 are sectional views of the shutter attachment part of the disk cartridge, and FIG. 8 is a sectional view of the shutter attachment part of the disk cartridge. FIG.

In the embodiment shown in FIG. 5, the outwardly protruding protrusions 12c, 12d
As in the case of the embodiment shown in the figure, it is formed in a straight line along the side edge 12b of the shutter 12.

In this embodiment, the side edge 12b of the shutter 12 and the cartridge case 10 are in direct contact, but since the shutter 12 is sufficiently reinforced by the protrusions 12c and 12d, when sliding as in the conventional case, The shutter 12 does not undergo elastic deformation under pressure, and the side edge 12b of the shutter 12 and the cartridge case 10 do not engage with each other.

In addition, in the embodiment shown in FIG.
2c, 12d are provided in a protruding manner, and outwardly directed protrusions 12c, 12d are provided in the central portion in parallel with the protrusions 2c, 12d. This embodiment provides the same effects as the embodiments shown in FIGS. 2 to 4 described above.

In addition, in the embodiment shown in FIG. 7, instead of the bent projections as in the embodiments shown in FIGS. 2 to 6, solid projections 12c,
12d is formed on the outer surface of the shutter 12.
This embodiment provides the same effects as the embodiment shown in FIG. 5 described above.

Incidentally, in the above embodiment, the projections 12c, 1
2d has been described only in the case where a linear protrusion extending in the longitudinal direction of the shutter 12 is formed, but the gist of the present invention is to provide the shutter 12 with a protrusion for preventing deformation. The shape of the projections 12c and 12d is not limited to this, and may be formed into any other shape. For example, as shown in FIG. 8, it is also possible to use a shutter 12 in which X-shaped deformation prevention protrusions 12c and 12d protrude from the inner or outer surface of the shutter 12.

Further, in the above embodiment, the protrusion 12c,
12d along the side edge 12b of the shutter 12.
Although only the embodiment in which one to three strips are formed has been described, the gist of the present invention is not limited to this, as it is similar to the above, and the protrusions 12c,
The quantity and arrangement of 12d can also be arbitrarily determined.

〔Effect of the invention〕

As described above, the disc cartridge of the present invention improves the rigidity of the shutter by providing a deformation-preventing protrusion on the sliding part of the shutter with the cartridge case, so that it is prevented from being subjected to unauthorized external forces unlike conventional ones. The shutter is hardly deformed even if it is operated, and the durability of the shutter is greatly improved. Also,
As a result of the improved rigidity of the shutter, the deflection when attached to a recording/playback device is reduced, and the side edges of the shutter do not interfere with the cartridge case. is never deleted. Thereby, it is possible to suppress the generation of chips on the cartridge case due to the sliding operation of the shutter, and it is possible to prevent the recording and reproducing performance of the optical disk from being deteriorated due to the adhesion of the chips.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the external appearance of a conventional disk cartridge, FIG. 2 is a plan view of a disk cartridge showing an embodiment of the present invention, and FIG. 3 is a sectional view taken along line A-A in FIG. 4 is an exploded perspective view of the disk cartridge shown in FIG. 2, FIGS. 5 to 7 are cross-sectional views of the shutter mounting portion of the disk cartridge showing other embodiments of the present invention, and FIG. 8 is an exploded perspective view of the disk cartridge shown in FIG. FIG. 3 is a plan view of a shutter showing another embodiment of the present invention. 10: Cartridge case, 10a: Upper case, 10b: Lower case, 10c: Spindle hole,
10d: Head insertion hole, 10e, 10f: Wall part,
10g, 10h: flat part, 11: optical disk, 1
2: Shutter, 12a: Tip, 12b: Side edge, 12c, 12d: Projection, 14a, 14b:
Guide section.

Claims (1)

[Scope of Claims] 1. A cartridge case consisting of an upper case and a lower case and having a spindle hole and a head insertion hole, a disk-shaped recording medium rotatably housed inside this cartridge case, and the above-mentioned cartridge case. In a disk cartridge equipped with a shutter that can open and close both the spindle hole and the head insertion hole, a deformation prevention device extending in the longitudinal direction or diagonal direction of the surface portion of the shutter that opens and closes the spindle hole and the head insertion hole. A disc cartridge characterized by having a protrusion. 2. Claims characterized in that the deformation prevention protrusion is formed to protrude from at least one of a surface of the shutter facing the cartridge case and a surface opposite thereto. The disk cartridge according to item 1. 3. The disk car according to claim 1, wherein the shutter is attached to the surface of at least one of an upper case and a lower case constituting the disk cartridge. Tori Tsuji. 4. Claim 1, wherein the shutter is made of a metal plate bent into a U-shape.
Disk cartridge as described in section. 5. The disk cartridge according to claim 1, wherein a plurality of said deformation prevention protrusions are formed on a surface portion of said shutter which opens and closes said spindle hole and head insertion hole. 6. The disk cartridge according to claim 1, wherein the deformation preventing protrusion is formed on a surface portion of the shutter that opens and closes the spindle hole and the head insertion hole. 7. Claim 1, wherein the deformation-preventing protrusion is formed protruding from a surface portion of the shutter that opens and closes the spindle hole and the head insertion hole without plastic deformation of the surface portion.
Disk cartridge as described in section. 8 The shutter closes at the outer periphery of the spindle hole and head insertion hole of the cartridge case, and the deformation prevention protrusion formed on the shutter closes between the shutter and the surface of the cartridge case. 2. The disk cartridge according to claim 1, wherein the disk cartridge is configured to close the disk cartridge. 9. The disk cartridge according to claim 1, wherein the distal end of the shutter is movably held by a guide section attached to the cartridge case.