JPH0664881B2 - Disc cartridge - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge used for a floppy disk in which a recording medium such as a magnetic disk is rotatably incorporated.

Structure of conventional example and its problems In recent years, the development of magnetic media for magnetic recording has been remarkable, and in recent years, in particular, floppy disks for magnetic recording housed in hard cases have become available for easy use. , It seems that the number will increase in the future.

Hereinafter, a conventional disc cartridge will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a conventional example. 1
Is an upper cartridge, 2 is a magnetic disk, 3 is a hub, 4 is a non-woven fabric, 5 is a lower cartridge, and 6 is a leaf spring. A hub 3 is attached to the magnetic disk 2. Non-woven fabric 4
Is made of a resin material, and the lower cartridge 5
It is attached to the shaded portion 5b on the inner surface by heat welding or the like. The leaf spring 6 is made of an elastic material such as a resin film, and one end portion 6a thereof is attached to the inner surface of the lower cartridge 5 with an adhesive or the like, and the protrusion 5d provided on the inner surface of the lower cartridge 5 serves as a pillow to hold the nonwoven fabric 4 in place. It has an urging action of pushing it toward the magnetic disk 2. Although not shown, the non-woven fabric 4 is also attached to the inner surface of the upper cartridge 1 in the same manner so that the magnetic disk 2 is sandwiched from both sides. An information recording / reproducing head is inserted into the magnetic disk 2 from an external driver (not shown) through the opening 1a of the upper cartridge 1 or the opening 5a of the lower cartridge 5 to perform information recording / reproduction. In the magnetic disk 2, the hub 3 is rotated from the opening 5c by the drive shaft of an external driver. FIG. 2 shows a cross-sectional view of the above-mentioned leaf spring 6 part. This action has the same effect as the leaf spring 6 when the magnetic disc 2 rotates dust or dirt on the surface of the magnetic disc 2.
The nonwoven fabric 4 urged by means has a cleaning action of wiping off dust and dirt, and the respective projections 5d and 1b help the nonwoven fabric 4 to easily hit the magnetic disk.

As a problem of the magnetic disk cartridge constructed in this way, since this kind of cartridge is intended to be used for carrying and various places, the pressure as an external force is easily applied to the arrows 7, 7 '. Therefore, when a pressure as an external force is applied to the arrows 7 and 7 ', the upper and lower cartridges 1 and 5 are deformed, and the magnetic disk 2 is easily damaged by the edges of the protrusions 5d and 1b, resulting in a data error (particularly a hard error). This is a cause of (unreproducible), and particularly when the force of the arrow 7'is applied at a position slightly deviated from the protrusions 5d and 1b, it tends to be damaged.

SUMMARY OF THE INVENTION In view of the problems described above, the present invention provides a disk cartridge that exhibits a particularly excellent effect against external force without lowering the cleaning action.

The disc cartridge of the present invention comprises a rotatable disc-shaped recording medium, a vertically divided cartridge containing the disc-shaped recording medium, and an inner side of the vertically divided cartridge along the disc-shaped recording medium. The provided non-woven fabric and one end is attached to the inner surface of the cartridge,
A leaf spring for urging the non-woven fabric to the disc-shaped recording medium at its free end side, and a protrusion provided on the inner surface of the cartridge facing the leaf spring so as to have a gentle convex curved surface with respect to the disc-shaped recording medium, It is characterized in that it is provided with a protrusion that forms a pillow action of the leaf spring.

According to this structure, even if an external force is applied to the upper and lower cartridges and the cartridge is deformed, the protrusion protruding on the inner surface of the cartridge has a gentle convex curved surface through the plate spring with respect to the disc-shaped recording medium and no edge is present. Therefore, the disc-shaped recording medium is not damaged. Also,
Since the protrusion with a gentle convex curved surface is arranged on the inner surface of the cartridge where the leaf spring faces to form a pillow of the leaf spring, even if the leaf spring is largely deformed by the external force to the cartridge, the leaf spring has its own spring property. The original shape is immediately restored, and there is no change in the impervious force for bringing the nonwoven fabric into contact with the disk-shaped recording medium, and the cleaning action is not reduced.

Description of Embodiments FIG. 3 shows a disk cartridge according to a first embodiment of the present invention.

The drawing shows a sectional view of the leaf spring 6 portion, and the same parts as those in the conventional example are denoted by the same reference numerals. Projection 1c on the inner surface of the upper cartridge 1, projection 5e on the inner surface of the lower cartridge 5
Has a shape composed of a gentle convex curved surface.
Nonwoven fabric 4 sandwiches magnetic disk 2 from both sides, and leaf spring 6
The magnetic disk 2 is urged to clean the magnetic disk 2. As shown in the figure, since the protrusions 1c and 5e have a shape with an extremely gentle convex curved surface, the pressing force as an external force is sharp with respect to the magnetic disk 2 no matter where it is applied in the direction of arrows 7 and 7 '. There is no edge to hit, and it has a structure that will not be damaged even if a considerably high pressure is applied.

FIG. 4 is a cross-sectional view of the urging means of the disk cartridge according to the second embodiment of the present invention, in which the same parts as in the conventional example are designated by the same reference numerals. The inner surface of the upper cartridge 1 is provided with a plurality of protrusions 1d, and the inner surface of the lower cartridge 5 is provided with a plurality of protrusions 5f. These protrusions 1d and 5f are also the first
Since the structure having a smooth convex curved surface is similar to that of the above embodiment, even if an external force is applied to the arrows 7 and 7 ', there is no edge and the structure is not damaged. Combined protrusion 5f
Has a pillow effect of the leaf spring 6, and therefore has excellent cleaning characteristics.

EFFECTS OF THE INVENTION As described above, the disc cartridge of the present invention has the protrusion portion that is formed on the inner surface of the cartridge and has a pillow function of a leaf spring.
By making the disk-shaped recording medium a shape having a gentle convex curved surface, it is possible to eliminate scratches on the disk-shaped magnetic medium due to external force during handling in a conventional disk cartridge without lowering the cleaning action.
Even if it is handled roughly, there is no problem at all and the handling property can be greatly improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a conventional disc cartridge, FIG. 2 is a sectional view of the urging means of FIG. 1, and FIG. 3 is a sectional view of the urging means of a disc cartridge according to an embodiment of the present invention. FIG. 4 is a sectional view of a biasing means portion of a disk cartridge according to another embodiment of the present invention. 1 ... Upper cartridge, 2 ... Magnetic disk, 3 ... Hub, 4 ... Nonwoven fabric, 5 ... Lower cartridge, 1c, 1d, 5e, 5
f: projection, 6: leaf spring.

Claims (1)

[Claims] 1. A rotatable disk-shaped recording medium, a vertically divided cartridge containing the same, and a non-woven fabric provided along the disk-shaped recording medium on the inner surface of each of the vertically divided cartridges. A leaf spring having one end attached to the inner surface of the cartridge and urging the non-woven fabric toward the disc-shaped recording medium at its free end side; and a disc spring on the inner surface of the cartridge where the leaf spring faces the disc-shaped recording medium. A disc cartridge, which is provided so as to have a gentle convex curved surface, and which has a protrusion that acts as a pillow of the leaf spring.