JPH0322664B2 - - Google Patents

Description

[Detailed description of the invention]

[Field of Application of the Invention] The present invention relates to a magnetic head support mechanism in a magnetic storage device that brings the magnetic head into contact with a flexible disk. [Background of the Invention] As a mechanism for supporting a magnetic head, for example, as disclosed in Japanese Patent Publication No. 58-43826 and Japanese Patent Publication No. 58-43828, the head is attached to a gimbal, or the gimbal is supported by a pivot or a knife edge. Combinations are known. These have improved head touch by allowing the undulations of the disk surface to pursue the head. However, from the perspective of the relative positional deviation between the head and the disk,
In the case of planar gimbals, there is a problem in that the relative position shifts as the head tilts. FIG. 6 is a diagram for explaining the amount of head displacement when the flexible disk is tilted in a conventional head support mechanism using a planar gimbal. Fixed parts 18a and 19a of planar gimbals are glued to the upper and lower arms, respectively, and upper and lower heads 16,
17 is glued. Gimbal fixed part 18a
and the movable part 18b are connected in a direction perpendicular to the plane of the paper by a narrow connecting part 18c, and this connecting part 18
By twisting c due to elastic deformation, the head 16 can follow the inclination of the disk 22. The same applies to the gimbals 19a and 19b in the above example. In this configuration, the head 16 rotates around the gimbal connection 18c, so the surface of the head that contacts the disk is aligned with the lower head e.
The amount of relative positional deviation between the upper and lower heads is 2e. [Object of the Invention] An object of the present invention is to solve the above-mentioned problems of the prior art, so that the inclination of the head follows the inclination due to the undulation of the disk, and even if the head is inclined, the relative positional deviation between the head and the disk is prevented. To provide a magnetic head support mechanism that prevents this from occurring. [Summary of the Invention] The present invention has a gimbal shape in which the head rotates approximately around the head gap position so that the head gap position does not shift even if the head is tilted. [Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. This example shows a head support mechanism of a flexible disk device in which magnetic heads are located on the upper and lower sides, respectively. As shown in FIG. 1, a thin plate gimbal 3 bent into a trapezoidal shape is attached to the lower arm 1, and a head 5 is attached to this gimbal. The upper head 6 is also attached to the trapezoidal gimbal 4 on the arm 2 and attached to the gimbal. At this time, the intersection C of the extended lines of the two sides of the upper gimbal is on the head mating plane AA', and the intersection of the extended lines of the two sides of the lower gimbal is also at the same position. With this configuration, even if there is a height error or tilt error of the flexible disk 7 as shown in Fig. 2, the upper and lower gimbals 3 and 4 will deform.
Approximately, the relative position between the head and the flexible disk remains unchanged, and recording and reproduction can be performed normally. 3 and 4 show a second embodiment of the present invention, in which an inverted trapezoidal gimbal 9 is attached to the lower side of the arm 8, and a head 10 is attached to this gimbal. Headgap 1 in these diagrams
1 is located on the upper surface of the head 10, and a flexible disk 12 runs on this surface. Note that Figures 3 and 4 only show the lower head part, and you can rotate the same structure by 180 degrees and place it on the upper side, or place a pad on the upper side and use it as a single-sided head. can be used. In this second embodiment, in addition to the fact that there is no positional shift due to the inclination of the flexible disk, if the head height can be designed low, the inclination of the head is stable against the head pressing force. Regarding the shape of the gimbal, for a double-sided head, the extension lines of the four legs of the trapezoid of the upper and lower gimbals intersect at a point on the mating surface of the upper and lower heads, and for a single-sided head, the extension lines of the two legs of the trapezoid of the gimbal are A shape that intersects at the head gap surface is good. FIG. 5 is a perspective view showing the third embodiment, in which the head 13 is attached to the gimbal 14 and the gimbal 14 is attached to the gimbal 14.
is attached to arm 15. Here, the gimbal 14 is a bent portion 14 having a degree of freedom in the first direction.
a and a bent portion 14b having a degree of freedom in the second direction. Each of these bent portions has a V-shape corresponding to a leg portion of a trapezoid. With this configuration, the head 13 is tilted approximately with the center of the surface having the head gap 13a as the rotation center with respect to the inclination of the two degrees of freedom, so that Therefore, the relative positions of the flexible disk and the head gap will not shift. By the way, the amount of positional deviation e of the head with respect to the tilt angle θ of the head is calculated for the head support mechanism using a conventional planar gimbal shown in FIG. 6 and the head support mechanism according to the present invention shown in FIGS. 1 and 2. The comparison is shown in Table 1 below. In this table, as an example, head height H = 3.5 mm, head width B
= 3.4mm, and the height L of the trapezoidal gimbal = 3.5mm. In this case, as shown in Table 1, if the head inclination angle is 1 degree or less, the head using the trapezoidal gimbal according to the present invention will have less head positional deviation than the head using the conventional planar gimbal.
Improved to less than 1/1000.

〔Effect of the invention〕

As explained above, according to the present invention, even if there is a height error between the head and the disk, a tilt error, a waviness of the disk, etc., there will be almost no relative positional deviation between the head and the disk, so data can be written. This has the effect of eliminating read errors. Further, it is possible to have large design tolerances for the above-mentioned height errors, tilt errors, disk waviness, and the like.

[Brief explanation of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention;
FIG. 2 is an explanatory diagram showing the head inclination state in FIG. 1;
3 is a perspective view showing the second embodiment, FIG. 4 is a side view of FIG. 3, FIG. 5 is a perspective view showing the third embodiment, and FIG. 6 is a diagram of a conventional magnetic head support mechanism. FIG. 3 is a cross-sectional view for explaining the displacement of the head. 1, 2... Arm, 3, 4... Gimbal, 5,
6...Head, 8...Arm, 9...Gimbal,
10...Head, 13...Head, 14...Gimbal, 16...Arm.

Claims (1)

[Claims] 1. In a magnetic head support mechanism that brings the magnetic head into contact with a flexible disk, a gimbal for supporting the magnetic head is provided on the magnetic head support arm, and the gimbal has a cross-sectional shape such that the top and bottom sides are parallel to each other. 1. A support mechanism for a magnetic head, characterized in that the gimbal is bent into a shape such that extension lines of the sides of the gimbal intersect on a surface of the magnetic head that contacts a flexible disk.