JPH0452864Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a floppy disk for a magnetic recording/reproducing device in which the medium is housed in a disk case.

BACKGROUND ART A liner made of non-woven fabric or the like is adhered to the inner surface of a disk case where the media of a floppy disk faces, to remove static electricity when the media rotates and to prevent dust from adhering to the media surface.

A disk case 1 of a conventional floppy disk is shown in FIGS. 8 and 9. disk case 1
has a recess 3 that can receive the media 2 at approximately the center;
As shown in FIG. 9, the plate-shaped bodies 1a and 1b each having the recesses 3 and 3 formed therein are pasted together with the recesses 3 and 3 facing each other. Approximately at the center of the recesses 3, 3, through holes 5, 5 are bored into which the boss portion 4 of the disk can be loosely inserted. In addition, slits 6, 6 are formed in the plate-shaped bodies 1a, 1b, so that the disk can be recorded.
During reproduction, the magnetic head of the magnetic recording/reproducing apparatus comes into contact with the medium 2 at the slits 6, 6. In addition,
In the case shown in FIGS. 8 and 9, since information is recorded and reproduced on both sides of the medium 2, the slits 6, 6 are formed at two locations.

In the recesses 3, 3 of the dish-shaped bodies 1a, 1b,
A liner 7 is attached to a wide area of the area divided into two by the slits 6, 6. It should be noted that the liner is not attached to a small portion of the divided portions, and the liner becomes an exposed portion 8.

Problems to be Solved by the Invention The conventional disk case 1 described above has the following problems because it has an exposed portion 8 to which the liner 7 is not attached.

When recording/reproducing information on this floppy disk using a magnetic recording/reproducing device, when the magnetic head is brought into contact with the media 2, the surface of the liner 7 and the exposed portion 8
Since the height difference between the media 2 and the surface of the media 2 is small, the surface of the media 2 may come into contact with the exposed portion 8. If the media 2 rotates while contacting the exposed portion 8, scratches will be formed on the surface of the media 2, which may cause drop-outs (a phenomenon in which the amplitude of the recording signal suddenly drops due to scratches or foreign matter adhering to the media during recording). .

In order to solve this problem, a liner can be attached to the exposed part 8 as well, but since it is separate from the existing liner 7, the number of man-hours for attaching it increases, the work is troublesome, and the cost of the floppy disk increases. It will rise.

Therefore, in view of the above problems, this invention provides a floppy disk that does not damage the rotating media and does not increase costs even if there is an exposed portion of the disk case on the opposing part of the media. It is intended to.

Means for Solving the Problems In order to solve the above problems, the floppy disk according to this invention includes a medium that can record and reproduce information on both sides, and a device that accommodates and rotatably supports this medium. , a floppy disk consisting of a disk case in which two slits are formed in which the magnetic head of a magnetic recording/reproducing device that contacts the medium is located, the above two slits being formed in the opposing portions of the medium on the inner surface of the disk case. The liner is adhered to a wide area sandwiched by the slits, and the end of the liner located at the edge of the slit is made to protrude more toward the media surface than the other portions, so that it is closer to the media surface. It is a feature.

Function The inner surface of the disk case is exposed in the small area sandwiched between the two slits on the inner surface of the disk case, but the inner surface of the disk case is exposed by the edge of the liner located at the edge of the slit. The portion of the media facing the small area is spaced apart from the inner surface of the disk case by the end thereof.

Embodiments Hereinafter, the floppy disk according to the invention will be specifically explained based on the illustrated preferred embodiments.

The disk case 11 has a media 1 approximately in the center.
As shown in FIGS. 4 and 7, the dish-shaped bodies 11a and 11b each having recesses 13 and 13 capable of receiving 2 are pasted together with the recesses 13 and 13 facing each other. There is. Approximately at the center of the recesses 13, there is a through hole 1 into which the boss portion 14 of the disk can be loosely inserted.
5 and 15 are drilled. In addition, the dish-shaped body 11
Slits 16, 16 are formed in a and 11b, and the slits 1 and 16 are formed during recording and reproduction of the disc.
The magnetic head of the magnetic recording/reproducing device comes into contact with the medium 12 at portions 6 and 16.

In the recesses 13, 13 of the dish-shaped bodies 11a, 11b,
A liner 18 is attached to a wide area 17 of the area divided into two by the slits 16, 16. On the other hand, the liner is not attached to a small area, leaving an exposed area 19.

The ends 20, 20 of the liner 18 facing the slits 16, 16 are raised to protrude more than the other parts and approach the media 12, as shown in FIG. In order to lift the end portions 20, 20, as shown in FIGS. 1 and 2, separate raising liners 21, 21 are attached to the end portions 20, 20 and lifted, or as shown in FIG. As shown in FIG.
There are some items that have been attached to 11b and lifted. Further, as shown in FIG. 4 and FIG.
It is also possible to integrally mold the raised protrusions 22, 22 at the positions where the end portions 20, 20 of 8 are located. The shape of the raised protrusions 22, 22 may be one in which they protrude with a constant width (Fig. 6a), two protrusions formed in a line at a predetermined interval (Fig. 6b), or one in which they protrude in a predetermined manner. A conceivable example is one in which a plurality of dot-like protrusions are formed at certain positions (FIG. 6c).

When a floppy disk with a medium 12 housed in the disk case 11 constructed as described above is attached to a magnetic recording/reproducing device to record/reproduce information, the magnetic head contacts the rotating medium 12 at the slits 16, 16. do. media 12
Even if the slits 16, 16 and the portion facing the exposed portion 19 try to contact the surface of the exposed portion 19,
Because the ends 20, 20 of the liner 18 are closer to the media 12 at the edges of the slits 16, 16 than the other portions, the ends 20, 20 of the liner 18,
20 and the surface of the exposed portion 19.

Effects of the invention As explained above, the floppy disk according to this invention includes a medium that can record and reproduce information on both sides, and a magnetic recording and reproducing device that houses and rotatably supports this medium and that contacts the medium. In a floppy disk consisting of a disk case in which two slits are formed where the magnetic head of the disk is located, a wide area sandwiched between the two slits on the opposing portions of the media on the inner surface of the disk case is used. The liner is attached to the slit, and the end of the liner located at the edge of the slit protrudes toward the media surface more than the other parts, so that it is closer to the media surface, so the following effects are achieved. .

Even if the surface of the media tries to come into contact with the exposed part of the disk case to which the liner is not attached, the media will only come into contact with the end of the liner located at the edge of the slit, and will be separated appropriately from the surface of the exposed part. and never come into contact with it. Therefore, it has the effect of preventing the occurrence of dropouts as much as possible. In addition, since the structure is simple in that the end of the liner located at the edge of the slit is brought closer to the media than other parts, there is no increase in cost without increasing the number of man-hours for liner pasting work. do not have.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the floppy disk according to the invention. FIG. 1 is an exploded perspective view of the disk case, and FIG. 2 is an exploded perspective view of the liner of one embodiment. FIG. 3 is a perspective view of another embodiment of the liner. 4 to 6 show another embodiment, in which FIG. 4 is a sectional view taken along the line - in FIG. 7, FIG. 5 is an exploded perspective view, and FIG. It is a perspective view of a raised protrusion. FIG. 7 is a perspective view of the floppy disk. 8 and 9 show a conventional floppy disk. FIG. 8 is a perspective view of an exploded disk case, and FIG. 9 is a sectional view corresponding to FIG. 4. 11...Disk case, 12...Media,
13, 13... recess, 16, 16... slit,
17... wide area, 18... liner, 19...
...Exposed part, 20, 20... End part, 21, 21...
Raising liner, 22, 22... Raising protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] A medium capable of recording and reproducing information on both sides, and a slit that accommodates and rotatably supports this medium, and in which the magnetic head of a magnetic recording and reproducing device that contacts the medium is located. In a floppy disk consisting of a disk case and a disk case formed in two places, a liner is attached to a wide area sandwiched between the two slits of the opposing portions of the media on the inner surface of the disk case, A floppy disk characterized in that the end of the liner located at the edge of the slit protrudes more toward the media surface than the other portions and is closer to the media surface.