JPH0581816A - Disk cartridge - Google Patents

Abstract

PURPOSE:To obtain a disk cartridge reduced in occurrence of hard error by suppressing as much as possible the scattering of liner chips to the magnetic disk surface of a head window caused by the vibration, etc., at the chucking time. CONSTITUTION:The nearly C shaped liner 4 formed by chamfering a part of the doughnut shape to clean the magnetic disk is mounted on each inside of upper shell and lower shell of the main body of cartridge by means of bonding the peripheral part of the liner. Also, in the disk cartridge having uplifted ribs 8 provided nearly in parallel to each longitudinal periphery of each head window 6 of the above-mentioned upper shell and lower shell, chamfered edges 5a, 5b of the liner are provided in distance of 3-7mm from the longitudinal periphery of the head window 6, and also the above-mentioned uplifted ribs are provided in the distance of 1-2.5mm from the chamfered edge of the said liner to the inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly to a disk cartridge in which dust, liner scraps and the like are prevented from scattering on the magnetic disk surface.

[0002]

2. Description of the Related Art In a disk cartridge, a liner having a substantially C-shape, which is a notch-shaped cutout for cleaning a magnetic disk, is usually provided on each inner surface of the upper shell and the lower shell of the cartridge body. There is one in which the peripheral portions are attached by bonding and are provided substantially parallel to the long side peripheral edges of the head windows of the upper shell and the lower shell.

That is, as shown in FIG. 2, a liner 72 is provided on the inner surface 70a of the stepped recess of the shell 70. The liner 72 has a donut shape and is cut out at a portion corresponding to the head window 75 to have a substantially C-shape. (The lower part is omitted in FIG. 2). The liner 72 is attached to the inner surface 70a of the step recess by adhering the peripheral edge 73 thereof, and the cutout edges 72a and 72a of the liner 72 are
The raised ribs 74 are adhered to the head windows 75 so as to cover the edges of the long sides of the head windows 75.

[0004]

However, in the above disc cartridge, the cutout edge 72 of the liner 72 is used.
Liner waste is attached to the part a, and this liner waste may be scattered due to vibration during chucking.
The scattered liner debris easily falls onto the magnetic disk surface of the head window 75, and when the head abuts the magnetic disk surface, the debris is sandwiched between the head and the surface and scratches the medium, causing a hard error. May cause the cause of

In particular, even if liner scraps are generated from the liner 72 portion on the opposite side of the head window with the raised ribs 74 as boundaries, the liner scraps are pressed against the raised ribs 74 (while sandwiching the liner) and the magnetic disk surface. As a result, it does not scatter in the head wind 75, but
Notched edge 7 of liner 72 on the head wind side
If the width of the 2a portion is too long, the above scattering becomes a serious problem. On the contrary, since the cutout edge 72a is also the adhesive peripheral edge 73 of the liner 72, if the width thereof is shortened, the liner may be peeled off.

Accordingly, an object of the present invention is to provide a disk cartridge in which liner waste is prevented from being scattered to the magnetic disk surface of the head window as much as possible due to vibration thereof during chucking, and hard errors are reduced. Especially.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a substantially C-shaped liner for cleaning a magnetic disk is formed on each of the inner surfaces of the upper shell and the lower shell of a cartridge body, the liner having a substantially C-shape. In a disk cartridge having a raised rib which is attached by adhering the peripheral edge of the liner and is provided substantially parallel to the long side edges of the head windows of the upper shell and the lower shell, the cutout edge of the liner is set to the head. Provided at a distance of 3 to 7 mm from the long side edge of the window, and the raised rib is 1 to 2.5 mm inward from the notched edge of the liner.
This is achieved by providing a disk cartridge characterized by being provided at a distance of.

[0008]

According to the disk cartridge of the present invention, since the notched edge of the liner is provided at a distance of 3 mm or more from the long side edge of the head window, the vibration of the liner scatters during chucking. Even if it does, as is clear from the experimental example described later, the liner waste does not scatter in the headwind. Therefore, the liner waste is not caught between the head and the magnetic disk surface. On the other hand, the width of the half inner surface that is not covered with the liner is 7 mm because the notched edge is 7 mm or less from the long side peripheral edge.
There is no fear that the surface of the rotating magnetic disk will come off the liner surface and directly touch the inner surface of the half to be damaged.

Further, since the raised rib is provided at a distance of 2.5 mm or less inward from the notched edge of the liner, the area of the adhesive peripheral edge portion of the edge of the liner is determined, and liner waste is generated at that portion. The amount can be suppressed as much as possible. Therefore, in combination with the distance between the notched edge and the long side edge being 3 mm or more, the scattering of the liner debris to the head window during chucking is suppressed as much as possible, and the risk of causing a hard error is reduced.

On the other hand, since the raised ribs are provided 1 mm or more inward from the notched edge of the liner, a sufficient adhesive area can be taken as an adhesive peripheral portion at the edge of the liner, and the liner may be peeled off. Absent.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk cartridge according to the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a disk cartridge according to the present invention, and FIG. 1 is an inside view of the lower half of the cartridge. In the disk cartridge according to this embodiment, as shown in FIG. 1, an inner surface 2a of a lower shell 2 of the cartridge main body is provided with a liner 4 having a substantially C-shaped shape in which a magnetic disk is cleaned and a donut shape is partially cut away. A known disc is mounted by attaching the peripheral edge portion 5 of the liner 4 to each other, and has the raised ribs 8 provided substantially parallel to the respective long side peripheral edges 6a and 6b of the head window 6 of the lower shell 2. It is the same as the cartridge.

As shown in FIG. 1, the disc cartridge according to this embodiment has a cutout edge 5a of the liner 4 as described above.
Is provided at a distance S of 3 mm to 7 mm from the long side peripheral edge 6a of the head window 6, and the raised rib 8 is inward from the notched edge 5a of the liner to 1 mm to 2.5 mm.
Is provided at a distance T. The present embodiment will be further described. As shown in FIG.
The distance S between the a and the long side peripheral edge 6a is set in the range of 3 mm to 7 mm, and the inner surface 2a of the lower half in this portion is the uncovered portion of the liner 4. Further, the distance T between the notched edge 5a and the raised rib 8 is provided in the range of 1 mm to 2.5 mm, and this portion is a part of the adhesive peripheral edge portion 5 for securely attaching the liner 4 to the lower half inner surface 2a. Has become.

The positional relationship among the cutout edge 5a of the liner 4, the long side edge 6a of the head window 6 and the raised rib 8 is as follows. The same applies to the rib 8. In the disk cartridge of the present embodiment configured as described above, the cutout edges 5a and 5b of the liner 4 are the long side edges 6a and 6b to 3 of the head window 6, respectively.
Since they are separated by more than mm, even if the liner scraps are scattered due to the vibration during chucking, the head wind 6
Is suppressed from scattering. Further, since the uncovered portion of the liner 4 where the inner surface of the lower half 2 directly appears between the notched edges 5a, 5b and the long side peripheral edges 6a, 6b of the head window 6 is 7 mm or less, There is no possibility that the magnetic disk will be brought into sliding contact with the inner surface of the half 2 directly and damaged.

Further, since the distance T between the raised ribs 8 and 8 and the notched edges 5a and 5b of the liner is 1 mm or more, a sufficient width can be taken as the bonding peripheral edge portion 5, and there is a risk of liner peeling. There is little nature. On the other hand, since the raised ribs 8, 8 are limited to a distance of 2.5 mm or less from the cutout edges 5a, 5b of the liner 4, the cutout edges 5a, 5b
The area of the adhesive peripheral edge portion 5 of b is also limited, and the amount of liner waste generated at that portion is suppressed as much as possible. Therefore, such a limitation is combined with the distance between the cutout edges 5a, 5b and the long side periphery being set to 3 mm or more, and the scattering amount of liner waste into the head wind 6 is suppressed as much as possible.
Prevents hard errors.

During the rotation of the magnetic disk, the raised ribs 8,
8, the head window is cleaned so that no dust is generated in the head window and a soft error is prevented. Further, based on the experimental results of the present inventors, in order to substantially prevent the hard error, the distance T between the raised rib and the notched edge is:
It is preferably 2.5 mm or less, particularly 1 mm to 2 mm. Further, the distance S between the cutout edges 5a, 5b and the long side edges 6a, 6b of the head window 6 is preferably 3 mm to 7 mm, and particularly 3 mm to 5 mm, based on the results of the experimental examples shown below.

[0016]

[Experimental example] The distance T between the notched edge of the liner and the raised rib is 2
mm, and the distance S between the end of the cutout and the long side periphery of the head wind was set to 0, 1, 2, 3, 4, 5, 6, 7 mm, and disk cartridges were prepared as samples,
The following operation was performed using them.

The above sample was chucked and then taken out without rotating the magnetic disk, and the amount of dust on the magnetic disk surface in the head window was measured. The distance S between the notched edge and the long edge of the head wind is 0 mm
Table 1 shows the reduction ratios of the dust amounts of the other samples with the dust amount of the sample of 100 as 100.

[0018]

[Table 1] It is understood from the experimental results that the dust amount sharply decreases when the distance is 3 mm or more, and further decreases when the distance is 5 mm or more.

In the above embodiment, the notched edges 5a, 5b of the liner 4, the long side peripheral edges 6a, 6b of the head wind, and the raised ribs 8, 8 are arranged only in the lower half 2 as described above. Although shown, these distance relationships may be applied not only to the upper half but also to both the upper half and the lower half.

[0020]

The disk cartridge according to the present invention is
When chucking, it is possible to minimize scattering of liner scraps to the magnetic disk surface in the head window due to vibrations and the like, and to reduce hard errors.

[Brief description of drawings]

FIG. 1 is an internal view of a lower half of a disc cartridge according to the present invention.

FIG. 2 is a partial internal view of a lower half of a conventional disc cartridge.

[Explanation of symbols]

 2 Lower Half 2a Lower Half Stepped Recess Inner Surface 4 Liner 5 Adhesive Edges 5a, 5b Notched Edge 6 Headwind 6a, 6b Long Side Edge 8 Raised Rib

Claims (1)

[Claims] 1. A substantially C-shaped liner, which is a notch-shaped cutout for cleaning a magnetic disk, is attached to the inner surface of each of the upper shell and the lower shell of the cartridge body at the peripheral edge of the liner. In the disk cartridge having the raised ribs which are attached by the above-mentioned method and which are provided substantially parallel to the long side peripheral edges of the respective head windows of the upper shell and the lower shell, the notched edges of the liner are separated from the long side peripheral edges of the head window by 3 At a distance of .about.7 mm and the raised ribs are inward from the notched edge of the liner 1-2.
A disk cartridge characterized by being provided at a distance of 5 mm.