JPS6025051A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To obtain the invariably stable and excellent contacting state of a head in the recording area of a disk by shaping a disk facing surface which is closer to a magnetic disk side near at least either of the inner and outer circumferential sides of the magnetic disk. CONSTITUTION:In the 1st example, the disk facing surface 41 of a stabilizing member 41 is so curved as to come closer to the disk 1 near the outer and inner circumferential sides of the recording area of the disk 1 as shown by 41c, and then the disk 1 is forced to be along the disk facing surface 41a of the stabilizing member 41. Consequently, the one-side abutting phenomenon of the head 3 is eliminated. In the figure, 41b is an escape groove for the head. in the 2nd example, the plane is merely flexed into a taper shape instead of curving the part 41c close to the disk 1 in the disk facing surface of the stabilizing member 41 as shown in the 1st example.

Description

TECHNICAL FIELD The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device that uses a flexible magnetic disk and has a magnetic head and a disk stabilizing member arranged to sandwich the magnetic disk.

(Prior Art) In a magnetic disk device as described in 2., for example, as shown in FIGS. The magnetic head 3 which records and reproduces information is attached to the center /head la and rotated at a predetermined number of revolutions, and comes into contact with the recording surface of the magnetic disk l, which records and reproduces information. A disk stabilizing member 4 is fixedly provided at a position facing the head 3 with the disk 1 in between, and the stabilizing member 4 stabilizes the portion of the disk 1 that passes through the head 3 while recording and reproducing information. was going on.

Here, the magnetic head 3 is movable between the inner end position 3' and the outer end position 3', corresponding to the recording area of the disk l, and is shown in FIG. 1(Q). As shown in FIG. 2, an escape groove 4b for the head 3 is formed in the center of the disk facing surface 4a of the stabilizing member 4 along the movement path of the head 3.

According to the inventor's experiment, if the disk-facing surface 4a of the stabilizing member 4 with respect to the disk l is configured to be flat in the radial direction of the disk l, as shown in FIG. The uneven contact of the spatula 183 on the outer track T1 and the inner track T2 in the recording area causes the disk l
was observed by developing a magnetic pattern. That is, the shaded part in the figure is the part magnetized by the head 3.

According to this, the state of contact between the magnetic head 3 and the disk L at the inner and outer circumferential positions of the disk L indicated by the square 3' is as shown in FIG. This is thought to be because the air film formed between the member 4 and the disk facing surface 4a becomes unstable at the boundary with atmospheric pressure.

(1) The present invention has been made in view of the above-mentioned circumstances, and provides a magnetic disk that uses a flexible magnetic disk and has a magnetic head and a disk stabilizing member arranged to sandwich the disk. The purpose of the apparatus is to eliminate the uneven contact of the head against the disk so that stable and good contact of the head can always be obtained in the recording area of the disk.

(Example) Hereinafter, the present invention will be described in detail with continued reference to the drawings.

First, in the first embodiment shown in FIG. 4, the disk facing surface 41a of the stabilizing member 41 is arranged near the outer circumferential side and the inner circumferential side of the recording area of the disk l, as shown by 41c.
By curving it in an R-shape so as to bring it closer to each other, the disk 1 is forced to lie along the disk facing surface 41a of the stabilizing member 41, thereby eliminating the above-mentioned phenomenon of uneven contact of the head 3. This was done in such a way that it was resolved.

Note that 41b is an escape groove for the spatula 3.

Next, the second section shown in FIG. In this embodiment, instead of curving the portion 41c of the disk-facing surface 41a of the stabilizing member 41 close to the disk 1 in an R-shape as in the first embodiment, the flat surface is simply curved as shown by 41d. Although it is bent to form a tapered shape, the same effect can also be obtained.

Next, the third embodiment shown in FIG. 6 is different from the second embodiment shown in FIG. The stabilizing member 41 is fixed to the fixing member 5 with screws 7, and the disk 1 is placed near the boundary between the horizontal portion 41a' and the adjacent portion 41d of the disk facing surface 41a. A groove 41e is provided in a direction perpendicular to the radial direction of the fixing member 5 to form a thin walled portion, and adjustment screws 6 are provided in screw holes provided in the fixing member 5 so as to face each outer position of the thin walled portion. It is being By tightening or loosening the adjustment screw 6, it becomes possible to adjust the proximal portion 4''ld of the disk facing surface 41a of the stabilizing member 41 with respect to the disk l.

This third embodiment is advantageous in the following points. That is, as can be understood from FIG. 2, the state of partial contact of the spatula F3 against the disk 1 is different between the inner circumferential side (track T+) and the outer circumferential side (track T2) of the disk l. However, the degree of one-sidedness is extremely high. Therefore, disk 1
By appropriately adjusting the amount of proximity of the proximal portion 41d of the opposing surface 41a of the stabilizing member 41 to the disc l on the inner and outer peripheral sides of the disc, it is possible to eliminate uneven contact over the entire recording area of the disc l. This means that

Of course, also in the embodiment shown in FIG. 4.5, both proximal portions 41c;
They may be formed by setting a proximity amount of d.

As described above, as an example, the disk facing surface 4 of the stabilizing member 41 is
1a is provided with portions 41c; 41d closer to the disk 1 on both the inner and outer circumferential sides of the disk 1; It may also be provided only near one of the outer circumferential sides. That is, the second
The uneven contact of the head 3 in either direction, as explained in the figure, can be resolved by, for example, adjusting the tilt of the head 3 in the radial direction of the disk 1. In the middle area of the two areas, the above-mentioned tilt adjustment of the second hand 3 is performed to the extent that there is no negative effect.
By eliminating the uneven contact near the inner circumferential side or outer circumferential side of the disk l described in the figure, the uneven contact at the remaining portion 41c and 41d of the disk facing surface 41a of the stabilizing member 41 is eliminated. It may be possible to provide it in order to eliminate the problem.

(Effects) As described in detail below, according to the present invention, a magnetic disk device using a flexible magnetic disk and having a magnetic disk 71 and a disk stabilizing member placed between the flexible magnetic disks can be used. With this very simple device, uneven contact of the head against the disk can be eliminated, and good head contact can be obtained over the entire recording area of the disk. It is beneficial.

[Brief explanation of drawings]

FIG. 1 shows an example of a conventionally known magnetic disk device, particularly the main parts related to the present invention. Figure 2 shows the inside of the disc when recording is performed on the disc by the device shown in Figure 1. FIG. 3 is a diagram showing the state of contact between the head and the disk in the device shown in FIG. 1; FIG. 4, FIG. 5, and FIG. Figure 6 shows the first embodiment of the present invention. It is a figure especially showing the cross-sectional shape of a disk stabilizing member in a 2nd and 3rd example. 1---1 flexible magnetic disk, 3--111 magnetic head, 41--m-disk stabilizing member, 41a--disk facing surface, 41c; 41d--1 adjacent portion. Patent applicant Canon Co., Ltd.

Claims (1)

[Claims] (1:l In a magnetic disk device 6 in which a magnetic head and a disk stabilizing member are arranged to sandwich an F1 flexible magnetic disk, the disk facing surface of the disk stabilizing member is placed inside the magnetic disk. A magnetic disk device characterized by having a shape closer to the magnetic disk near at least one of the circumferential side and the outer circumferential side. (2) By the above-mentioned disk on the magnetic disk facing surface of the stabilizing member L. A magnetic disk device according to claim 1, wherein a portion adjacent to the magnetic disk can be adjusted.