JPH0845219A - Flying magnetic head - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the flying height of the slider and prevent scratches on the disk. A flat portion 42 having an appropriate area is provided in the center of a slide surface 41 of a slider 40, and a curved surface portion 43 such as a spherical surface is provided around the flat portion 42. When the slide surface 41 receives the air that moves with the rotation of the magneto-optical disk, the slider 40 has a large flying height because most of the air is received by the flat portion 42. Therefore, the possibility that the slider 40 will contact the magneto-optical disk is extremely low. Further, even if the air outflow end 45 of the slider 40 comes into contact with the magneto-optical disk due to vibration, shock, foreign matter adhesion, or waviness of the magneto-optical disk, the air outflow end 45 side will have a convex curved surface portion 43. Therefore, it is possible to reliably prevent the magneto-optical disc from being scratched and improve the reliability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating magnetic head suitable for application to hard disks, magneto-optical disk devices and the like.

[0002]

2. Description of the Related Art In rewritable hard disks, magneto-optical disk devices, etc., floating magnetic heads have come to be used in order to improve reliability. FIG.
Shows the configuration of a general magneto-optical disk device 1. The figure shows a state in which the cabinet is removed. The magneto-optical disk device 1 includes a rewritable magneto-optical disk 11
Is driven to rotate by the spindle motor 12. An optical pickup 13 is arranged on the lower surface side of the magneto-optical disk 11,
A floating magnetic head 14 is arranged on the upper surface side.

Optical pickup 13 and floating magnetic head 1
4 is attached to the moving unit 15, and the moving unit 15 is attached to the movable unit 17 of the linear motor 16. As a result, the optical pickup 13 and the floating magnetic head 1
4 moves linearly along the radial direction of the magneto-optical disk 11. The light emitted from the optical system block 18 is transmitted to the optical pickup 13 by the moving unit 1.
It is supplied via the prism 19 in the No. 5. Further, the light reflected by the magneto-optical disk 11 is received by the optical system block 18 via the optical pickup 13 and the prism 19. The spindle motor 12, the linear motor 16, and the optical system block 18 are fixed on the chassis 20.

FIG. 5 is a perspective view of the conventional floating magnetic head 14 as viewed from below. The magnetic head 14 is attached to the tip of the attachment portion 21 attached to the moving portion 15 (FIG. 4).
A load beam 22 as an elastic arm is provided. An opening 23 is provided on the root side of the load beam 22, and the spring constant of the load beam 22 is appropriately set by this. A fixed portion 25 of a flexure 24 as a holding portion is fixed to the tip of the load beam 22 by spot welding, for example, and a slider 28 is attached to a leaf spring-like displacement portion 27 provided below the fixed portion 25. A magnetic pole 29 is fitted into the slider 28, and the magnetic field generated from the magnetic pole 29 changes the direction of the magnetic recording material of the magneto-optical disk 11 to record or erase information.

As shown in FIG. 6A, the slider 28 has a flat slide surface 30 facing the magneto-optical disk 11, and a taper portion 32 for assisting air inflow is formed on the air inflow end 31 side thereof. . Magnetic pole 2 on the air outflow end 33 side
9 is attached. In addition, the slider 28 is shown in FIG.
As shown in (A), the slide surface 30 may be formed into a convex curved surface, for example, a spherical surface.

[0006]

By the way, FIG. 6 (A)
In the slider 28 shown in (1), since the slide surface 30 is a flat surface, air can be efficiently received, and the flying height can be increased. When the magneto-optical disc 11 has a large swell or dust is likely to be attached like the magneto-optical disc device 1, it is preferable to increase the flying height. However, in this slider 28, the air inflow end 31 side floats higher than the air outflow end 33 side as shown in FIG. 3B, and the sharp air outflow end 33 approaches the magneto-optical disk 11, and in some cases There is a risk of contact. In this case, the magneto-optical disk 11 may be damaged and the recording / reproducing process may not be normally performed.

Further, in the slider 28 of FIG. 7A, the sliding surface 30 is a convex curved surface entirely from the air inflow end 31 to the air outflow end 33 as described above. Therefore, as shown in FIG. 3B, even if the air outflow end 33 becomes low, it is unlikely to come into contact with the magneto-optical disk 11, and even if it comes into contact, the magneto-optical disk 11 will not be damaged. However, since the air received by the slide surface 30 easily flows out to the surroundings, there is a problem that the flying height becomes lower than that of the slider 28 of FIG. 6 (A).

When the floating magnetic head 14 is used in the magneto-optical disk device 1 or the like, the flying height of the slider 28 is several μm or more from the viewpoint of increasing the reliability without damaging the magneto-optical disk 11. It is desirable to have high flying characteristics. Furthermore, when dust or the like is attached to the magneto-optical disk 11 or the magneto-optical disk 11 is undulating,
Even if the slider 28 comes into contact with the magneto-optical disk 11, it must be scratched. However, the conventional slider 28 cannot satisfy these two requirements at the same time.

Therefore, the present invention solves the above-mentioned problems and proposes a flying type magnetic head capable of realizing high flying characteristics and high reliability.

[0010]

In order to solve the above-mentioned problems, in the present invention, an arm slidably arranged in the radial direction of the disk and a tip end of the arm are arranged.
A flying magnetic head having a slider that receives air moving as the disk rotates and floats, a magnetic pole attached to the slider, and a displaceable holding portion interposed between the arm and the slider. The disk is characterized in that a part of the surface facing the disk is a flat surface and the other part is a convex curved surface.

[0011]

As shown in FIGS. 1 and 2A, the slider 4
A flat surface portion 42 having an appropriate area is provided at the center of the slide surface 41 of 0, and the periphery thereof is a curved surface portion 43 such as a spherical surface. As shown in FIG. 2B, the slider 40 receives most of the air when the slide surface 41 receives the air that moves as the magneto-optical disk 11 rotates.
Since it is received at 2, the flying height becomes high. Therefore, the possibility of the slider 40 coming into contact with the magneto-optical disk 11 is extremely low.

Further, even if the air outflow end 45 of the slider 40 should come into contact with the magneto-optical disk 11 due to vibration, shock, foreign matter adhesion, or undulation of the magneto-optical disk 11, the air outflow end 45 side has a convex shape. Since it is the curved surface portion 43, it is possible to reliably prevent the magneto-optical disk 11 from being scratched and improve the reliability.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the flying type magnetic head according to the present invention will be described in detail with reference to the drawings. The same parts as those described above are designated by the same reference numerals, and detailed description thereof is omitted.

FIG. 1 shows a floating magnetic head 1 according to the present invention.
FIG. 4 shows a perspective view of 4 from the bottom. This flying magnetic head 1
4 is applied to, for example, the magneto-optical disk device 1 (FIG. 4) and the like, and a load beam 22 having an appropriate spring constant is provided at the tip of a mounting part 21 mounted on the moving part 15 of the magneto-optical disk device 1. The fixing portion 25 of the flexure 24 is fixed to its tip. The flexure 24 has a leaf spring-shaped displacement portion 27 that is displaceable in all directions with an appropriate spring constant.
Is provided, and the slider 40 is bonded to the lower surface thereof. A magnetic pole 29 for generating a magnetic field is provided at an appropriate position on the slider 40.
Is attached.

As shown in FIG. 2, the slider 40 has a flat portion 42 having an appropriate area in the approximate center of the slide surface 41, and a convex curved surface portion 43 around the flat portion 42. That is, the air inflow end 44 side and the air outflow end 45 side are convex curved surfaces. The curved surface portion 43 can be a spherical surface or another curved surface. A magnetic pole 29 is attached to the center of the air outflow end 45 side. The lower end surface of the magnetic pole 29 is formed in a curved shape along the surface of the curved surface portion 43.

In the floating magnetic head 14, as shown in FIG. 2B, the slider surface 41 receives the air that moves with the rotation of the magneto-optical disk 11, and the slider 40 floats due to the buoyant force. Here, the slide surface 41
Since the center is a flat plane portion 42, the air can be efficiently received, and the flying height can be increased to prevent the slider 40 from coming into contact with the magneto-optical disk 11. Further, since the air outflow end 45 side closest to the magneto-optical disk 11 has the convex curved surface portion 43, even if it contacts the magneto-optical disk 11, the magneto-optical disk 11 may be damaged. There is no. Slider 40
The flying height can be adjusted by appropriately setting the ratio of the total area of the slide surface 41 and the area of the flat portion 42.

In the above-described embodiment, the center of the slide surface 41 is the flat portion 42 and the periphery thereof is the curved surface portion 43. However, as shown in FIG. The tapered portion 32 for assisting the air flow is provided, and the curved surface portion 43 is provided only on the air outflow end 45 side.
The plane portion 42 may be entirely formed between the curved surface portion 43 and the curved surface portion 43. In this case, as shown in FIG.
Since the flat portion 42 occupies a large proportion of the total area of 1, the flying height is further increased, and the slider 40 can be prevented from coming into contact with the magneto-optical disk 11. Moreover, since the air outflow end 45 side is a convex curved surface, the air outflow end 45 may be damaged due to some reason such as vibration, impact, adhesion of foreign matter, or swell.
Even if it contacts the magneto-optical disk 11, the magneto-optical disk 1
It is possible to reliably prevent the scratches from being formed on the 1.

[0018]

As described above, according to the present invention, the arm slidably arranged in the radial direction of the disk and the arm arranged at the tip of the arm and receiving the air that moves as the disk rotates, levitates. In a flying magnetic head having a slider, a magnetic pole attached to the slider, and a displaceable holder interposed between the arm and the slider,
It is characterized in that a part of the surface of the slider facing the disk is a flat surface and the other part is a convex curved surface.

Therefore, according to the present invention, by making a part of the surface of the slider facing the disk, for example, the central portion, a flat surface, the flying height can be increased as compared with the case where the entire surface is a curved surface, and It is possible to reduce the possibility of contact and improve the floating characteristics. In addition, even if the slider and the disk come into contact with each other due to vibration, impact, adhesion of foreign matter, unevenness of the disk, etc. Therefore, it is possible to reliably prevent the disc from being scratched, and the reliability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view seen from below showing a configuration of a floating magnetic head 14 according to the present invention.

FIG. 2 is a perspective view of a slider 40 seen from below.

FIG. 3 is a perspective view showing a modified example of a slider 40.

FIG. 4 is a configuration diagram of a general magneto-optical disk device 1.

FIG. 5 is a perspective view of a conventional floating magnetic head 14 seen from below.

FIG. 6 is a perspective view of a first example of a conventional slider 28 seen from below.

FIG. 7 is a perspective view of a second example of a conventional slider 28 seen from below.

[Explanation of symbols]

 1 Magneto-optical disk device 11 Magneto-optical disk 13 Optical pickup 14 Flying magnetic head 22 Load beam 24 Flexure 27 Displacement part 28, 40 Slider 29 Magnetic pole 30, 41 Sliding surface 31, 44 Air inflow end 32 Tapered part 33, 45 Air outflow Edge 42 Flat part 43 Curved part

Claims (4)

[Claims] 1. An arm slidably arranged in a radial direction of a disk, a slider arranged at a tip of the arm and flying by receiving air moving as the disk rotates, and a slider attached to the slider. In a flying magnetic head having a magnetic pole and a displaceable holding part interposed between the arm and the slider, a part of the surface of the slider facing the disk is a flat surface, and the other part is a flat surface. A flying magnetic head having a convex curved surface. 2. The flying magnetic head according to claim 1, wherein the center of the facing surface is a flat surface. 3. The flying magnetic head according to claim 1, wherein the center of the facing surface and the air inflow side are continuous flat surfaces. 4. The taper surface for guiding air to the end portion on the air inflow side is provided.
The flying type magnetic head described in.