JPS5979463A - Magnetic head device - Google Patents

Abstract

PURPOSE:To ensure an assured and stable contact between a disk and a magnetic head for a double-sided flexible disk device by crossing rectangularly the directions to each other for the degree of freedom of the magnetic head provided oppositely to both sides of the disk. CONSTITUTION:An upper head 40 opposite to the disk surface is attached to a gimbal spring 41, and the center part 42 of the spring 41 is supported by a support bar 43. The part 42 has mainly the degree of freedom to move on the basis of an axis 44 in the direction rectangular to the shifting direction (an arrow A) of the head 40. While a lower head 50 opposite to the disk surface is attached to a gimbal spring 51. The center part 52 of the spring 51 is supported by a support bar 53 and had chiefly the degree of freedom to move around an axis 54 in the direction equal to the moving direction (an arrow A) of the head 50. In such a way, the degree of freedom of a single direction is given to the springs 41 and 51 supporting heads 40 and 50 respectively. Then these directions having the degree of freedom are set orthogonal to each other to insert the flexible disk 1 between both heads.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic head device in a double-sided flexible magnetic disk device.

[Technical background of the invention and its problems]

Some flexible magnetic disk devices (hereinafter simply referred to as disk devices) are double-sided types that can record data on both sides of a flexible disk. As shown in FIG. 1, such a disk device has upper and lower magnetic heads (hereinafter simply referred to as disks) facing each side of a flexible disk (hereinafter simply referred to as disk) 1, which is a magnetic recording medium. (referred to as heads) 2 and 3. The lower head 3 is attached to a carriage 5 via a gimbal spring 4.

This carriage 5 can move parallel to the lower surface of the disk 1. Further, the upper head 2 is attached to an arm 7 via a gimbal spring 6. This arm 7 is attached to the carriage 5 via a leaf spring 8,
Furthermore, pressure is constantly applied by a compression spring 9 to move the disc 1 in the direction.

In the double-sided disk device as described above, the support mechanism for the upper and lower heads 2 and 3 is supported by gimbal springs 4 and 6 that have a degree of freedom in either no direction or mainly in one direction. Specifically, for example, as shown in FIG. 2(a), both the upper 1 and lower 1111 heads 2 and 3 are attached to a gimbal spring 21 having the same degree of freedom. This gimbal spring 21 has a central portion 22 of, for example, 2
It is supported by the support piece 23 at a certain point, and the degree of freedom is mainly (
I have this. The heads 20, which are the upper and lower heads 2 and 3, are attached to the central part 22, and are shown in FIG.
)) (As shown in this figure, it mainly has the degree of freedom to move in the direction shown by arrow B. In addition, Fig. 2 (C) shows
This shows that the head 20 can hardly move around the axis in the same direction as arrow A. In such a case, the head's posture followability in a direction with a small degree of freedom becomes poor, and the way the upper and lower heads 2 and 3 contact the surface of the disk 1 may not match. Therefore, when reading data from the disk 1, there was a drawback that it became unstable. Further, since the degrees of freedom of the heads 2 and 3 are mainly in one direction, the worst situation may occur in which the disk 1 is damaged when the heads come into contact with the disk 1.

Furthermore, for example, there is a case where only the lower head 3 is attached to the central part 32 of the gimbal spring 31 as shown in FIG. 3(a). In this case, the upper head 2 is as shown in FIG. 2(a) above.
It is attached to the gimbal spring 21 shown in FIG. The gimbal spring 31 has its center portion 32 aligned in the direction of movement of the head (arrow A).
The middle frame 34 to which the support pieces 33 are attached is supported by support pieces 35 at the center of both ends in the direction perpendicular to arrow A. There is. Due to this structure, the head 30 (i.e., the lower head 3) has degrees of freedom in the directions of arrows B and C, as shown in FIGS. However, in this case, the upper and lower heads 2 and 3 tend to become unstable in the direction of the common degree of freedom, resulting in positional errors and output errors with respect to the disk 1. Therefore, in the past, there was a drawback that the functions of the disk device were degraded.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a magnetic head device that can reliably and stably contact a disk in a flexible disk device and can reliably realize the functions of the disk device. The purpose is to

[Summary of the invention]

That is, in the present invention, the upper and lower magnetic heads facing both sides of the flexible disk are mounted on each gimbal spring having a degree of freedom mainly in one direction about the axis. Each gimbal spring is configured such that its respective axes are orthogonal to each other.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 and FIG. 5 are diagrams showing the configuration according to the present invention. In FIG. 4(a), 41 is a gimbal head to which the upper head 40 facing the surface of the disk is attached, for example.

This gimbal spring 41 has a central portion 42 that is connected to a support piece 43.
It has a degree of freedom that allows it to move mainly around an axis 44 that is perpendicular to the direction of movement of the head (arrow A). That is, as shown in FIG. 4(b), the upper head 40 mainly has a degree of freedom in the direction not shown by arrow B. Furthermore, in FIG. 5(a), 51 is a gimbal spring on which the lower 1 μII head 50 facing the surface of the disk is sprung several times. This gimbal spring. The gimbal spring 51 has a central portion 52 supported by a support piece 53, and has a degree of freedom that allows it to move mainly around an axis 54 in the same direction as the head movement direction (arrow A). That is, as shown in FIG. 5(b),
The lower I radius 50 mainly has a degree of freedom in the direction shown by arrow B.

In this way, both the upper and lower heads 40.5
Each of the gimbal springs 41, 51 that support 0 is provided with a degree of freedom mainly in one direction, and the directions of the degrees of freedom are combined so as to be orthogonal to each other. Then, a flexible disk will be inserted between the upper and lower heads 40,50. In this case, suppose that the direction of movement of the disk and the direction of the degree of freedom of the upper head 40 are the same, and the accuracy per meter of the upper head 40 with respect to the disk is out of order.

In this case, since the lower head 5o has almost no degree of freedom in its direction, the direction of disk movement is corrected.

Therefore, both the upper and lower heads 40,50 will have better contact with the disk and will be in positive contact.

〔Effect of the invention〕

As detailed above, according to the present invention, in a double-sided flexible disk device, the directions of degrees of freedom of the respective magnetic heads provided opposite to each other on both sides of the disk are mutually orthogonal and different, so that each magnetic head has a different degree of freedom. The surface contact is corrected, improving the surface contact accuracy. Therefore, the magnetic head comes into reliable and stable contact with the disk, and damage to the disk due to uneven contact of the magnetic head can be prevented. Further, when attaching the magnetic head to the carriage or arm, there is no need to control the precision more than necessary, which has the effect of improving manufacturing operability.

[Brief explanation of drawings]

Figure 1 shows the configuration of a conventional double-sided flexible disk device, Figures 2 (a) to (C), and Figure 3 (a).
) to (c) are diagrams showing the structure of conventional gimbal springs, Figures 4 (a), (b) and Figure 5 (a),
(b) It is a figure showing the structure of the gimbal spring concerning one example of Hako's invention. 40.50 Magnetic head, 41.51...Gimbal spring. Applicant's representative Patent attorney Takehiko Suzue Figure 1 (1), B Figure 4 1 Figure 5 A□ (b) (a) 0

Claims (1)

[Claims] In a double-sided flexible magnetic disk device, a flexible disk is attached to a first gimbal spring so as to mainly have a degree of freedom in only one direction about an axis in a first direction, and is attached to a first surface of the flexible disk. A first magnetic head is provided facing each other, and a second gimbal spring is attached to the second gimbal spring so as to have a degree of freedom mainly in one direction about an axis in a second direction perpendicular to the first direction. A magnetic head device comprising: a second magnetic head provided opposite to a second surface of a flexible disk.