JPH0143387B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floppy disk.

Fig. 1 shows the developed inner surface of a conventional jacket, which is made of a flexible sheet made of vinyl chloride, etc., and has tabs 2A and 2B in a rectangular shape with two connected squares bordered by fold line 1. After an inner liner 4 made of soft nonwoven fabric or the like is attached to a sheet 3 having a shape marked with , a rotating shaft insertion hole 5 that is slightly larger than the rotating shaft hole of the disk, a long hole 6 for magnetic head contact, and a jacket are bent. a hole 7 forming a notch to prevent damage when the disc is damaged; a hole 8 forming a notch for protecting the disk from recording;
The index detection hole 9 of the disk is punched together with the interliner 4, and then folded in along the fold line 1 with the interliner inside as shown in FIG. Fold in and heat weld 10A to the outside of the sheet to form a rectangular envelope, inside which is a flexible disk 1.
1 is inserted and housed, the ear portion 2B is folded in and heat welded 10B to the outside of the sheet to enclose the disk.

The jacket containing this disk is attached to the computer's disk drive, and disk 11 is inserted into the computer's disk drive.
After inserting the spindle shaft of the drive into the rotating shaft insertion hole 5 and clamping and fixing it with the spindle hub, the disk 11 is rotated at high speed, and the magnetic head is inserted through the elongated hole 6 and moved in contact with the surface of the disk 11.
Writes and reads information.

The interliner 4 made of fibrous material such as a non-woven fabric attached to the sheet 3 protects the surface of the disk 11 from being damaged, and also protects the surface of the disk 11 from magnetic powder and particles generated when the disk 11 rotates in contact with the magnetic head. This traps foreign objects from the outside and prevents them from getting caught between the disk surface and the head, causing dropouts and errors.

However, with such conventional jackets,
Although errors often occur, the inventor believes that this is because the inner liner 4 made of fibers is not punched out sufficiently when punching out the long holes etc. in the sheet 3 covered with the inner liner as described above. As a result, as shown in FIG. 3, the fibers 12 of the interliner 4 come loose from the edges of the long holes 6 for head contact in the sheet 3, and as shown in FIG. This is due to a signal loss of 54.5d/λ due to the occurrence of a signal loss of 54.5d/λ due to the fibers of the interliner frayed from the edge of the rotating shaft insertion hole 5 adhering to the spindle hub that rotates while holding the disk 11 between the disks. The disk may become tilted due to being caught between the fibers, or the disk may not be held in the center of the spindle, causing the head to not follow the prescribed track of the disk, resulting in an error. Also, frayed fibers may become caught in the spindle hub. It was discovered that stress was applied to the disk part, leading to disk damage and shortened service life. The present invention eliminates such protrusion of fibers from the disk hole to prevent defects such as errors from occurring.

FIG. 5 shows an embodiment showing the inner surface of the developed jacket of the present invention, in which a band-shaped interliner 4A is arranged on both sides of the sheet 3 at a distance from the periphery of the holes 5, 6, 7, and 9. This is what I wore.

As a result, as shown in FIG.
The interliner 4A is sandwiched between the holes 5, 6, 7, and 9 to protect the disk surface, and the interliner 4A is separated from the holes 5, 6, 7, and 9 to prevent the fibers 12 from protruding as described above.

Further, since the interliner 4A is in the form of a band, the cutting yield is good, and since it is arranged on both sides of the sheet 3, the work efficiency is good.

FIG. 7 shows another embodiment of the present invention, which is a jacket in which a strip-shaped interliner 4B is attached laterally above the hole 5, and a strip-shaped interliner 4C is attached laterally between the holes 5 and 6. shows.

FIG. 8 shows still another embodiment of the present invention, in which an interliner 4D is attached to the inner surface of the jacket at a distance from the edges of each of the holes 5, 6, 7, and 9.

According to the present invention, since no whisker-like fibers come out from the hole edges of the jacket, defects such as errors can be completely prevented from occurring, and the material of the interliner can be saved, resulting in cost reduction.

Although various other modifications of the above embodiments are possible,
All of these are included in the present invention.

[Brief explanation of drawings]

FIG. 1 is a developed plan view of a conventional jacket. FIG. 2 is a plan view of a conventional jacket. FIG. 3 is an enlarged plan view of a long hole in a conventional jacket. 4 is a sectional view showing the disk and head taken along the line - in FIG. 3, and FIG. 5 is a developed plan view of the first embodiment of the present invention. FIG. 6 is a plan view of the first embodiment. FIG. 7 is a developed plan view of the second embodiment of the present invention. Figure 8 shows the third invention of the present invention.
FIG. 3 is a developed plan view of the embodiment. 3... Jacket seat, 5... Rotating shaft insertion hole,
6...Magnetic head insertion hole, 4, 4A, 4B, 4C,
4D...interliner, 11...disk, 13...head.

Claims (1)

[Claims] 1. A partial liner floppy disk characterized in that an interliner is provided inside a jacket, avoiding at least both the magnetic head insertion hole and the rotating shaft insertion hole of the floppy disk.