JPH02240886A - Magnetic head device - Google Patents

Abstract

PURPOSE:To reduce the occurrence of head crash by forming both end faces intersecting orthogonally with a moving direction with 2 or more planes and by suppressing the vibration effectively in the case of positioning a core. CONSTITUTION:A magnetic disk is driven at high speed, air flow occurs along the driving direction and a core 11a is floated from a magnetic disk face. The floating force is balanced with the rigidity of a gimbal spring 23 fixing the core 11a and a load spring member 22 to limit the floating quantity. A positioning means 12 moves the magnetic head 100a in a direction intersecting orthogonally with the driving direction of the magnetic disk when the head is positioned in the prescribed position of the magnetic disk. Both end faces 14a, 14b of the core 11a intersecting orthogonally with the moving direction are bisected respectively and protruded outward by 2 planes 1a, 1b and 2a, 2b. Then the disturbance of air flow is avoided, the vibration of the core 11a due to the occurrence of vortex and the occurrence of head crash are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head device, and particularly to a magnetic head device suitable for a magnetic disk device.

[Conventional technology]

Conventional examples are shown in FIGS. 4 and 5.

Conventionally, a magnetic disk device f50 as shown in FIG.
As a head device for recording and reproducing, a magnetic head 100b as shown in FIG. 4 is used. This magnetic head 100b has a rectangular core that is inserted between magnetic disks 1o stacked at regular intervals (see FIG. 5) and records and reproduces information on these magnetic disks 1o.
b, a positioning means 12 for positioning the core 1lb-Hff at a predetermined position on the disk 10 surface, and a core 11
b at one end and a core support mechanism 13 fixed to the positioning means 12 at the other end. Also,
These magnetic disks 1o are fixed to a spindle rotationally driven by a motor 52 and rotate at high speed.

The positioning means 12 mainly includes a support arm 21 to which the core support mechanism 13 is fixed at its tip.

Further, the core support mechanism 13 is actually composed of a load spring member 22 formed in a strip shape and a gimbal spring 23 equipped at the tip thereof and formed in a plate shape. The shape of the core lb is approximately a rectangular parallelepiped. On the other hand, two grooves 24 are provided on the air bearing surface on the side of the magnetic disk 10 along the rotational direction of the magnetic disk 10.

Therefore, the core Ilb floats from the surface of the magnetic disk 10 based on the principle of air bearing due to the air flow generated by the 100 revolutions of the magnetic disk, and the positioning means 12 positions the core Ilb. Moreover, the load spring member 22 and the gimbal spring 23
It has a function of stabilizing the floating amount of the core Ilb in balance with the force that floats the core Ilb.

A major factor in the performance of the magnetic disk device 50 is the accuracy in positioning the core 11b. Therefore, there is a need to improve positioning accuracy,
Generally, this positioning accuracy can be achieved by reducing the flying height of the core Ilb from the surface of the magnetic disk 10. This flying height is set to be very small, 1 [μm] or less, thereby improving the accuracy of recording and reproducing on the magnetic disk 10.

[Problem to be solved by the invention]

In the conventional example described above, the core has a rectangular parallelepiped shape, so when the core crosses the air flow generated by the rotation of the magnetic disk during positioning, the wind hits the side of the core and vibrates the core. For this reason, in the conventional example, the core often comes into contact with the rotating magnetic disk, causing a head crash.

(Object of the Invention) The object of the present invention is to improve the inconveniences seen in the conventional example, to effectively suppress the vibration that tends to occur when positioning the core, and to reduce the occurrence of head crashes caused by this. An object of the present invention is to provide a magnetic head device.

(Means for Solving the Problems) The present invention includes a rectangular core that is disposed between magnetic disks installed at a constant interval and that records and reproduces information on the magnetic disk, and The core is provided with a positioning means for positioning the magnetic disk at a predetermined position on the surface of the magnetic disk, and a core support mechanism in which the core is mounted on one end and the other end is fixed to the positioning means. A method is adopted in which each of the two surfaces is formed on two or more surfaces.This is intended to achieve the above-mentioned purpose.

[For production]

The magnetic disk rotates at high speed, which creates an air flow along the direction of rotation.

This air flow causes the core to float above the magnetic disk surface in balance with the rigidity of the core support.

When positioning the core at a predetermined position on the surface of the magnetic disk, the positioning means moves the core in a direction perpendicular to the rotational direction of the magnetic disk. At this time, it crosses the air flow generated by the rotation of the magnetic disk. At this time, since the side surface of the core that crosses the air is composed of two or more surfaces, the air flows smoothly on the surface of the core, and disturbance of the flow of air can be avoided.

[Embodiments of the invention]

An embodiment of the present invention will be explained based on FIGS. 1 to 3 and FIG. 5. Here, the same reference numerals are used for the same constituent members as in the conventional example described above.

In the embodiment shown in FIG. 1, a rectangular shape is provided between the magnetic disks 10 (see FIG. 5) installed at a constant interval to record and reproduce information on the magnetic disks 10. core lla and this core lla
The core support mechanism 13 is provided with a core lla at one end and fixed to the positioning means 12 at the other end. Both end surfaces 14a and 14b of the core lla perpendicular to the direction in which it moves during positioning are formed by two or more surfaces 1a, lb, 2a and 2b, respectively.

This will be explained in further detail.

The core support mechanism 13 is composed of a load spring member 22 and a gimbal spring 23. The core lla is attached to a gimbal spring 23, and the gimbal spring 23 is fixed to one end of the load spring member 22. The other end of the load spring member 22 is fixed to the positioning means 12. As shown in FIG. 2, the core lla has both end surfaces 14a, 14 perpendicular to the seek direction of the magnetic head 100.
b are each formed from two planes 1a, lb, 2a, 2b. Two grooves 24 are provided along the direction of air flow caused by the rotation of the magnetic disk IO. Next, the operation will be explained.

The magnetic disk lO is rotating at high speed, and for this reason,
Air flow occurs in the direction A in FIG. 1 along the rotational direction. This air flow causes the core lla to float above the surface of the magnetic disk 10.

This flying height affects the positioning accuracy of the core lla,
In turn, the performance of the magnetic disk device 50 is determined. For this reason, the gimbal spring 2 that fixes the core lla
3 and the rigidity of the load spring member 22 are one of the important factors that determine the amount of levitation in balance with the levitation blade produced by the air flow. When positioning the magnetic head 100 at a predetermined position on the surface of the magnetic disk 10, the positioning means 12 moves the core 11a in a direction perpendicular to the rotational direction of the magnetic disk 10 (direction B in FIG. 1). Moving. At this time, it crosses the air flow generated by the rotation of the magnetic disk IO. Here, as shown in FIG. 2, the core lla is divided into two upper and lower end surfaces 14a and 14b perpendicular to the moving direction of the core 11a, and is outwardly separated by two planes 1a and lb and 2a and 2b. It is formed to be convex. This prevents the air flow from being disturbed even if it hits the air, and the force exerted by the air can be minimized.
It is possible to prevent vibrations from occurring in the core 11a due to the influence of vortices and the like caused by air turbulence.

In this way, the core lla is positioned, and information is recorded and reproduced on the surface of the magnetic disk 10 at that position.

[Second Embodiment] Next, a second embodiment of the present invention will be described based on FIG. 3.

In this second embodiment, in the first embodiment described above (see FIG. 2), the two side surfaces 14a and 14b perpendicular to the moving direction of the core lla are divided into upper and lower halves, and two planes 1a, lb and 2a.

2b, instead of being formed to be convex outward, these two side surfaces are divided into left and right halves, and two planes 1a are formed.
, lb and 2a, 2b (see FIG. 3) are formed to be convex outward. The other configurations are the same as those of the first embodiment described above.

Even in this case, the same effects as in the first embodiment described above can be obtained.

〔Effect of the invention〕

As explained above, in the present invention, both end faces in the movement direction during positioning of the core inserted between stacked magnetic disks to record and reproduce information on these magnetic disks are formed by two or more surfaces, respectively. Formed.

As a result, when the core is positioned at a predetermined position on the magnetic disk surface, even if the core crosses the air flow generated by the rotation of the magnetic disk, even if it hits the air flow, it will not disturb the air flow. This can be avoided. For this reason, it is possible to prevent vibrations from occurring in the core due to the effects of vortices and the like caused by air turbulence, and this also prevents so-called head crashes, in which the core comes into contact with the magnetic disk surface and is destroyed due to this vibration. It is possible to provide an unprecedented and excellent magnetic transfer device that can prevent

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the state in which the core of the present invention is mounted, FIG. 2 is a perspective view showing the first embodiment of the invention, and FIG. 3 is a perspective view showing the second embodiment of the invention. Figure 4 is a perspective view showing a state in which a conventional core is mounted, and Figure 5 is a sectional view showing the entire magnetic disk device. la, lb...plane (forming one side of the core), 2a, 2b...plane (forming the other side of the core), 10...magnetic disk, lla・
... Core, 12 ... Positioning means, 13
...Core support mechanism.

Claims (1)

[Claims] (1) A rectangular core disposed between magnetic disks installed at a constant interval for recording and reproducing information on the magnetic disk; and a rectangular core placed at a predetermined position on the surface of the magnetic disk. In a magnetic head device comprising: a positioning means for positioning the core; and a core support mechanism equipped with the core at one end and fixed at the other end to the positioning means, both end surfaces of the core perpendicular to the direction in which it moves during positioning. A magnetic head device characterized in that each of the above is formed on two or more surfaces.