JPS59175074A - Jacket of medium - Google Patents

Abstract

PURPOSE:To perform recording with high density by forming a hole part which opens toward the center of a disk to a jacket at both sides of a head inserting hole of the jacket and at a place near the outer edge of the disk put into the jacket. CONSTITUTION:The hollow parts 28 are formed on the observe and reserve sides of a jacket 8 at both sides of a head inserting hole 25 and near the outer edge of an inside disk 9. This part 28 opens toward the center of the disk 9. For this part 28, a cut 29 is given to the jacket 8 and the outer side of the jacket is pressed in a hemispherical form 30 to form a hole part 31. An air current 32 is discharged through the part 31 in response to the revolutions of the disk 9. Then the part 28 is pushed down and touches the counter sheet. Thus the sheet on the observe and reserve sides of the jacket 8 are kept at a fixed distance equivalent to the total thickness of the part 28 and an interliner 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a recessed hole opening toward the center of the disk, which is located on both sides of the head insertion hole of the jacket and near the outer edge of the disk inserted into the jacket. This media jacket is characterized by the fact that the jacket is provided with a disc, which significantly reduces the friction between the jacket and the disc and eliminates dropouts.

FIG. 3 is a vertical cross-sectional view of a conventional flexible magnetic disk (1) installed in a drive. ) The truncated conical spindle hub (5) of the drive is inserted into the center shaft hole (4) of the disk ( 1) vibrates against the incliner (2) of the jacket, which causes the head (
In the insertion hole (25) (7), the ink liner on the inner edge of the hole frays and gets caught between the head and the disk, causing dropout.

The present invention solves these conventional drawbacks,
A medium characterized in that the jacket is provided with holes that are recessed and open toward the center of the disk, which are located on both sides of the head insertion hole of the jacket and near the outer edge of the disk inserted into the jacket. This is a summary of the jacket.

An embodiment of the present invention will be explained with reference to FIGS. 1, 2, and 4. A hard metal plate (10) is placed around the center hole of a flexible magnetic disk (9) housed in a jacket (8). This disk (10) (11) is a disk whose diameter is slightly smaller than the shaft window (12) of the jacket (8), and the disk (11) is a disk. A flat plate (13) that holds (9) and a shaft hole (14)
A disc (10) is fitted into the edge of the shaft cylinder (15), and the shaft hole (14) has a disc (9).
It becomes the central axis hole, and the circumference is a disk (10) (11
) is completely 5t.

The disc (11) is 5 mm thicker than the shaft plate (10) and is joined to the disc (9) via an annular slope (16) with a slightly smaller diameter, so that the outer surface of the disc (10) and the shaft cylinder (15) are connected to each other. The end faces are flush and are integrally fixed to the disk (9).

In order to rotate the disc (11), a recess (17) having different widths in the circumferential direction is provided, and this recess (17) has a wide part (18) and a narrow part (19). There are three parts.

When the jacket (8) is inserted into the drive, the pin (21) of the spindle hub (20) will forcefully enter the recess (17), but at that time, the bottle (21) will forcefully enter the wide part 93 (18) and enter the narrow part (1).
9), so it is firmly fixed and rotates without vertical or horizontal movement.

In addition, there is a G-shaped notch (22) at one place on the outer periphery of the disc (11).
A recessed portion is formed and can be used for indexes, etc.

The jacket (8) is made by folding a plastic sheet into two and making it into a bag and inserting the disc (9) into it.
23) is a spot welding part for adhering the ears and (24) &yo.

Further, the jacket (8) has a head insertion hole (25) and a breakage prevention notch (26) and a write protection patch (27) cut into the edge.

There is a throat insertion hole (25) on the front and back of the jacket (8).
On both sides of the inner disc (9), recesses (28) are located near the outer edge of the disc (9) and open towards the center of the disc.

This recess (28) is a cut (29) in the jacket (8).
As shown in Fig. 5, the outside of the disk is press-fitted into a hemispherical shape (30) to form a hole (31), and the disk (9
) rotates, the airflow (32) blows out from the hole (31), pushes down the recessed part (28), contacts the opposing sheet, and the front and back sheets of the jacket (8) move into the recessed part (28) as shown in Figure 6. 28) and the total thickness of the incliner (2).

This prevents friction between the disk and the incliner, and even if the head comes into contact with the rotating disk (9), the inner edge of the head insertion hole (25) does not come into contact with the disk (9), so the incliner does not come in contact with the disk (9) like in conventional products. (2) This prevents the fibers from fraying and entering between the head and the disk, resulting in F loss.

Furthermore, as shown in FIG. 6, the four recesses (28) contact the opposing sheet, thereby reinforcing the head insertion hole side portion of the jacket, which has many holes and notches, from being bent by external force.

Furthermore, as in this embodiment, a disk (10) is attached to the disk.
By providing (11), the center holding accuracy of the disc can be stably and highly maintained, so the concave part (2B)
Error-free high-density recording can be achieved by using the same system.

In addition to the embodiments described above, various modifications are all included in the present invention.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention. FIG. 2 is a rear view of an embodiment of the present invention. FIG. 3 is a vertical cross-sectional view of a conventional medium. FIG. Figure 5 is an enlarged cross-sectional view taken along line V-V in Figure 1 Figure 6 is VI-V in Figure 1
ll line sectional view 8... Jacket 31... Hole provided in the jacket that is recessed and opens ↑ Figure 3 Figure 5' Garden 461

Claims (1)

[Claims] A medium characterized in that the jacket is provided with holes that are recessed and open toward the center of the disk, which are located on both sides of the head insertion hole of the jacket and near the outer edge of the disk inserted into the jacket. Jaquent.