JPH0250316A - Magnetic head - Google Patents

Abstract

PURPOSE:To perform a fast information processing and recording with high reliability and with high density by providing a slider having a floating slider plane and a head chip pressed in a direction to protrude from the slider plane. CONSTITUTION:A magnetic head 1 is constituted of the slider 3 provided with the slider plane 4 to bring into contact with or float over a recording medium 2, and the head chip 5 provided on the slider 5 movably. When the recording medium 2 is stopped, the slider 3 of the magnetic head 1 is brought into contact with the recording medium 2, and also, the head chip 5 is retreated to a slider plane 4 side by deflecting an elastic body 10 when it is pressed on the recording medium 2. Also, when the air flows in the slider plane 4 according to the rotation of the recording medium 2 and the magnetic head 1 floats, the head chip 5 is protruded over the slider plane 4 by the reset force of the elastic body 10, and a space between the head chip 5 and the recording medium 2 is decreased, and the air functions as lubricant between the magnetic head 1 and the recording medium 2 smoothly. In such a way, the fast information processing and the recording with high density can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floating magnetic head with a slider.

[Summary of the Invention] The present invention includes a slider having a slider surface that floats as a recording medium rotates, and a head chip that is biased in a direction protruding from the slider surface by an elastic body provided on the slider. This configuration enables high-speed information processing and high-density recording on both hard disks and flexible disks without causing signal loss or deterioration in durability due to damage to the head chip or recording medium.

[Prior Art] A magnetic helix has been proposed as described in Japanese Patent Publication No. 49-26886.

In FIGS. 6 and 7, the magnetic head 1 includes a slider 3 having a slider surface 4 that contacts or floats on the recording medium 2, and a head chip 5 that is fixedly provided on the slider 3 and records and reproduces information. It consists of

This magnetic head I is attached to the tip of a flexure 11 made of a leaf spring, and the base end of this flexure 11 is fixed to an arm 12. The magnetic head l comes into contact with the recording medium 2 when the recording medium 2 is stopped, and
When air flows into the slider surface 4 due to the rotation of the slider, it gains lift and floats up.

This floating amount is determined by the position where the spring force of the floating blade and the flexure 11 are balanced. This floating blade varies greatly depending on the rotational speed of the recording medium 2, but currently the recording medium 2 is used at a speed of about 300 to 600 r, p, m.
The spacing between the head chip 5 and the recording medium 2 is several tens.
It is set to about μ shoulder.

[Problems to be Solved by the Invention] However, high-density recording and reproduction using short wavelengths of 0.1 μl or less, such as perpendicular magnetization recording, cannot be performed unless the spacing between the Herad chip 5 and the recording medium 2 is 0.1 μl or less. figure,
The problem with the prior art is that the spacing is too large, making it impossible to perform high-density recording and reproduction.

Further, the recording medium 2 may be, for example, I 000 r, p, m ~
If the disk is rotated at a high speed of about 3600 r, p, or m, the flying height increases and recording and reproducing are no longer possible, so there is a problem that high-speed information processing cannot be performed.

Furthermore, when the recording medium 2 is a hard disk, there is no surface runout (vibration) even when the recording medium rotates, so the magnetic head l
Although a stable flying height can be secured, since the recording medium 2 such as a flexible floppy disk has surface runout of about 100 μR and 71 rotations, there is also the problem that desired spacing cannot be secured.

The present invention has been made to solve the above-mentioned problems, and is capable of high-speed information processing regardless of whether the recording medium is hard or flexible, without causing signal loss or deterioration in durability due to damage to the head chip or recording medium. The purpose is to enable high-density recording.

[Means for Solving the Problems] The present invention provides a slider having a slider surface that floats as a recording medium rotates, and a head chip that is biased in a direction protruding from the slider surface by an elastic body provided on the slider. Its composition is that it has the following.

[Operation] When the recording medium is stopped, the slider of the magnetic head comes into contact with the recording medium, and when the head chip is pressed against the recording medium, the elastic body bends and retreats toward the slider surface.

When air flows into the slider surface as the recording medium rotates and the magnetic head floats, the head chip protrudes from the slider surface due to the restoring force of the elastic body, the spacing between the head chip and the recording medium becomes significantly smaller, and the magnetic head Air exhibits a smooth lubricating effect between the head and the recording medium.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

In FIGS. 1 and 2, a magnetic head 1 includes a slider 3 having a slider surface 4 that comes into contact with or floats on a recording medium 2, and a head chip 5 movably mounted on the slider 3.

The slider 3 is composed of a slider surface portion 6 whose negative surface is the slider surface 4, and a slider vertical wall portion 7 provided perpendicularly to one end of the slider surface portion 6, and has a cross-sectional shape of an L-shape. .

This slider 3 is integrally molded from a material such as ceramic. The slider surface 4 has a predetermined curvature, for example R
= approximately 50 to 200zi. A plurality of lateral slip prevention grooves 8 are formed in the slider surface 4 in the direction of air inflow. This lateral shift prevention groove 8 is formed by the magnetic head l.
This is to prevent the recording medium 2 from swinging in the radial direction. A head chip storage groove 9 is formed at the end of the slider surface portion 6 opposite to the slider vertical wall portion 7 .

The head chip 5 is stored in this head chip storage groove 9 so as to be able to protrude from and retreat from the slider surface 4.

The slider vertical wall portion 7 has leaf spring fitting grooves 7a, 7.
a are formed parallel to the slider surface 4 at predetermined intervals. These leaf spring fitting grooves 72L.

One end of a leaf spring 1O9IO serving as an elastic body is fitted into each of 7a, and is bonded by glass fusing or an adhesive. As shown in FIG. 3, helad tip holding grooves 10a and 10a are formed at the center of the other end of the leaf springs to and to, respectively.

The base of the helad tip 5 is held in these head chip holding grooves 10a, 10a with its tip slightly protruding from the slider surface 4, and the holding portion is bonded with an adhesive or the like.

Note that 5a is a gap of the helad tip 5, and 5b is a lead wire. Further, the magnetic head I is swingably attached to a flexure made of a temporary spring (not shown).

Next, the operation of the above embodiment will be explained based on FIGS. 4 and 5.

First, as shown in FIG. 6, when the recording medium 2 is stopped, the slider surface 4 of the magnetic head 1 is in contact with the recording medium 2. In this state, the Herad chip 5 is pressed by the recording medium 2, the leaf spring 1O is bent, and the head chip 5 is retreated into the head chip storage groove 9 of the slider 3.

Therefore, at the time of contact start/stop (when the magnetic head 1 contacts, starts, or stops the magnetic head 1 and the recording medium 2), the head chip 9 remains protruding, causing the recording medium 2 to
It is possible to prevent an increase in the frictional force between the terminal and the terminal, thereby preventing such damage, signal loss, and a decrease in durability.

Next, as shown in FIG. 5, when air flows into the slider surface 4 as the recording medium 2 rotates, the slider 3 floats, and the vicinity of the end of the slider surface 4 on the side of the helad tip 5 has a curved shape. Since negative pressure is generated, the flexible recording medium 2 is sucked toward the head chip 5 side. At this time, the flexible recording medium 2 generates surface wobbling of about 100 μml/rotation, but the slider surface 4 of the slider 3 eliminates the wobbling and runs stably.

Further, when the slider 3 floats, the head chip 5 protrudes from the slider surface 4 due to the restoring force of the leaf spring 10. Therefore, the recording medium 2 is, for example, too.

Rotates at a high speed of ~3600 r, p, m, slider 3
Even if the flying height increases, the spacing between the recording medium 2 and the Herad tip 5 remains in the boundary lubrication region of 0.1μ! The lubricating effect of air prevents damage to the head chip 5 and the recording medium 2, and also enables highly reliable high-speed information processing (access time is 20 ms or less), perpendicular magnetization recording, etc. Density recording becomes possible. Further, since the slider 3 and the helad tip 5 are separate bodies, there is an advantage that assembly and adjustment to the disk drive device is easy. Further, as the flexible recording medium, in addition to a floppy disk, a thin film medium fixed to a frame under tension (SSR) can be similarly used.

In the above embodiments, the slider is not limited to a curved slider, but may also be a spherical slider or a flat slider.

[Effects of the Invention] As is clear from the above description, according to the present invention, the slider has a slider surface that floats as the recording medium rotates, and the elastic body provided on the slider allows the slider to move in the direction protruding from the slider surface. Since the structure is equipped with a head chip that is energized by
Regardless of hard disk or flexible disk,
High-speed information processing and highly reliable high-density recording become possible.
This has the advantage of being easy to assemble and adjust to a disk drive device.

[Brief explanation of the drawing]

Figures 1 to 5 show one embodiment of the present invention.
The figure is a cross-sectional view of the magnetic head taken along the I-1 line in Figure 2, Figure 2 is a cross-sectional view of the magnetic head, Figure 3 is a side view of the magnetic head, and Figure 4 is a cross-sectional view of the magnetic head when the recording medium is stopped. 5 is a cross-sectional view showing the state of use of the magnetic head when the recording medium is rotating; FIGS. 6 and 7 are cross-sectional views showing the state of use of the magnetic head;
The figures show a conventional example; FIG. 6 is a perspective view of the magnetic head, and FIG. 7 is a side view of the magnetic head in a state of use. 1... Magnetic head, 2... Recording medium, 3... Slider, 4... Slider surface, 5... Head chip, 10... Elastic body (plate spring). Cross-sectional view of usage condition (example) Figure 4 Cross-sectional view of usage status (example) Figure 5

Claims (1)

[Claims] (1) A slider having a slider surface that floats as the recording medium rotates; and a head chip that is biased in a direction protruding from the slider surface by an elastic body provided on the slider. magnetic head.