JPH10222916A - Magnetic head device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage of a magnetic disk by a slider and improve a magnetic recording and reproducing efficiency by forming a curved portion at a periphery of a sliding surface side of the slider of a magnetic head device which includes the slider in a rectangular parallelepiped shape, having the sliding surface which relatively slides against a flexible magnetic disk with a specific coercive force, and has a recording and reproducing magnetic gap for a specific large capacity. SOLUTION: A slider 11 has a sliding face 11b which faces a magnetic disk surface having a coercive force of 1500Oe or more. A magnetic head to be accommodated into the slider 11 has a gap portion for recording and reproducing at 100MB or more at the sliding face 11b. A periphery of the slider 11 is blend-processed with a tape-type abrasive material to form a curved portion 11c with a width size C of 10 to 200μm and a depth size D of 1 to 100μm. When the magnetic disk rotates at a fast rotating speed, a negative pressure acts on the periphery portion of the sliding surface 11b, thereby maintaining an appropriate distance between the magnetic head and the magnetic disk surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device having a slider.

[0002]

2. Description of the Related Art Generally, a magnetic disk device such as a floppy disk device is configured to record and reproduce information by a magnetic head. The magnetic head is held by a head carriage, and the magnetic head is moved to an arbitrary position on the floppy disk by moving the head carriage between the inner peripheral side and the outer peripheral side of the floppy disk. In recent years, high-density (high-capacity) recording / reproduction has been performed, and the conventional low-density (standard capacity)
Floppy disks having a recording capacity of (megabytes) or 2 MB or more have been developed.

A conventional magnetic head device will be described with reference to FIGS. 1 is a rectangular parallelepiped slider having a concave portion 1a, a sliding surface 1b, an inclined portion 1c, and a head storage portion 1d, and 2 is stored in a head storage portion 1d of the slider 1 and has a storage capacity of 1
The upper portion of the recording / reproducing gap 2b for a high capacity of 00 MB or more is a high capacity magnetic head having a core 2a which is seen through the sliding surface 1b of the slider 1.

The slider 1 has an inclined portion 1c formed on a side edge of a sliding surface 1b, and the inclined portion 1c is processed by a ramp process. Here, ramp processing refers to fixing a rectangular parallelepiped slider to a rotating polishing machine in an inclined state, and polishing the slider to form an inclined portion 1c. As a result, the inclined portion 1c has a linear shape as shown in FIG.

[0005]

However, in the above configuration, since the slope 1c has a linear shape, the corner 1e is formed at the intersection with the sliding surface 1b. When the magnetic disk 3 hits the magnetic disk 3, the magnetic disk 3 is liable to be damaged, and when the rotation speed of the magnetic disk is increased, the slider 1 and the magnetic head 2 accommodated in the slider 1 fly away from the magnetic disk 3 to increase the magnetic recording / reproduction efficiency. Is worse.

[0006]

The above object is attained when the coercive force is one.
A magnetic head device having a high-capacity recording / reproducing gap having a storage capacity of 100 MB or more, comprising a slider having a substantially rectangular parallelepiped shape having a sliding surface relatively sliding with a flexible magnetic disk of 500 Oe or more. The problem is solved by forming an R portion on the side edge on the sliding surface side of the.

According to the above structure, damage to the magnetic disk by the slider is reduced, and even when the rotation speed of the magnetic disk is increased, the slider, especially the magnetic head stored in the slider, floats from the surface of the magnetic disk. And the magnetic recording / reproducing efficiency of the magnetic head is maintained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1, 2, and 3, an embodiment of a magnetic head device according to the present invention will be described. 2 and 3, reference numeral 11 denotes a rectangular parallelepiped made of a nonmagnetic material such as calcium titanate having a concave portion 11a, a sliding surface 11b (hatched portion in FIG. 1), an R portion (roundness) 11c, and a head storage portion 11d. The slider 12 has a head storage portion 11 of the slider 11.
d, and the upper part of the gap 12b is
Is a magnetic head having a core 12a to be seen on the sliding surface 11b.

The slider 11 has an R edge on the side edge of the sliding surface 11b.
A portion 11c is formed, and the R portion 11c is processed by blending. Here, the blending process is to move the tape-shaped polishing while polishing the side edge of the slider 11 while rotating the slider 11 to thereby form the R portion 11c.
Is formed. As a result, as shown in FIG. 2, the R portion 11c has a sliding surface 11b and a side portion 11e of the slider 11.
(R portion 11c) is formed in a round shape. As shown in FIG. 2, it was found that the width R is preferably 10 to 200 μm, and the depth D is preferably 1 to 100 μm.

The sliding surface 11b of the slider 11 faces the surface of the magnetic disk 13 having a coercive force of 1500 Oe (Oersted) or more as shown in FIG. Since the R portion 11c of the slider 11 has a round shape, damage due to contact with the magnetic disk 13 is reduced. When the rotating speed of the rotating magnetic disk 13 increases as indicated by an arrow E, the R portion 11c of the slider 11 has a round shape, so that the side edge of the sliding surface 11b of the slider 11 and the magnetic disk 13
Therefore, a negative pressure acts on the side edge of the sliding surface 11b of the slider 11, that is, a force in the direction of arrow F acts on the surface side of the magnetic disk 13, so that the slider 11
The distance between the magnetic head 12 housed in the magnetic disk 13 and the surface of the magnetic disk 13 is maintained.

As a result, the magnetic recording / reproducing efficiency of the magnetic head 12 with respect to the magnetic disk 13 is increased.

[0012]

As described above, the magnetic head device according to the present invention includes the slider having a substantially rectangular parallelepiped shape having a sliding surface that slides relatively with a flexible magnetic disk having a coercive force of 1500 Oe or more. In a magnetic head device having a high capacity recording / reproducing gap having a storage capacity of 100 MB or more, an R portion is formed on a side edge of the slider on the sliding surface side, so that damage to the magnetic disk by the slider is reduced. Even when the rotational speed of the magnetic disk is increased, the slider, especially the magnetic head contained in the slider, is prevented from flying above the magnetic disk surface, and the magnetic recording / reproducing efficiency of the magnetic head is maintained.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a magnetic head device according to the present invention.

FIG. 2 is a sectional view taken along the line BB of FIG. 1 showing the embodiment of the magnetic head device according to the present invention.

FIG. 3 shows an embodiment of a magnetic head device according to the present invention,
FIG. 3 is a side view of the magnetic disk facing the magnetic disk.

FIG. 4 is a plan view showing a conventional magnetic head device.

FIG. 5 is a sectional view taken along line AA of the conventional magnetic head device.

[Explanation of symbols]

 Reference Signs List 11 slider 12 magnetic head 12b gap 13 magnetic disk 11b sliding surface 11c R part

Claims (1)

[Claims] 1. A high-capacity recording / reproducing gap having a storage capacity of 100 MB or more, comprising a slider having a substantially rectangular parallelepiped shape having a sliding surface relatively sliding with a flexible magnetic disk having a coercive force of 1500 Oe or more. A magnetic head device having a magnetic head device, wherein an R portion is formed on a side edge of the slider on the sliding surface side.