JPS613303A - Magnetic disc device - Google Patents

Abstract

PURPOSE:To improve the output resolving power and the use efficiency of a medium by setting the end part in the inner peripheral side of the usable area of the medium as a CSS area and using a magnetic head element in the outer peripheral side as a magnetic head. CONSTITUTION:The end part in the inner peripheral side of a usable area W of a discoid medium 11 is set as a CSS area B1 of the medium, and a thin film magnetic head element 13 in the outer peripheral side is used as the magnetic head. Consequently, since the information recording density is reduced and the medium speed for information processing is raised because an information using area A1 is in the outer peripheral side of the usable area W, the output resolving power is improved. Since all of the usable area W except the CSS area B1 can be used as the information using area A1 because the head element 13 in the outer peripheral side is used, the use efficiency of the medium is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to C, S, S (Contact 5tart
The present invention relates to an improvement of a magnetic disk device in which a plurality of magnetic head elements of the 5top) type are arranged on the same slider that can move forward and backward along a disc-shaped medium.

In such a magnetic disk device, a part of the usable area of the medium is a magnetic head land area (hereinafter referred to as C, S, S).
, called a region. ), and one of the plurality of magnetic head elements is used as an information processing magnetic head.

[Conventional technology]

FIG. 2 shows the main parts of this type of conventional magnetic disk device. In the figure, 1 is a disk-shaped medium, 2 is a thin film magnetic head element on the inner circumference side (closest distance from the rotation center of medium 1), and 3 is a thin film magnetic head element on the outer circumference side (farthest distance from the rotation center of medium 1). It is a head element. The medium 1 is rotatable around the rotation center OO. The magnetic head elements 2 and 6 are attached to the same slider 4 in the illustrated arrangement, and the slider 4 is elastically supported by a support member 5 that can move forward and backward in the direction of the arrow.

In this case, the C, S, and S areas B1 (approximately 4 h) of the medium 1 are set at the outer end of the medium usable area W, and the inner magnetic head element 2 is used as a magnetic head. If the magnetic head element 2 fails, information processing is performed by the magnetic head 3 (located on the inner circumferential side) with the slider 4 facing the back surface of the medium 1 in a position symmetrical to that in FIG. R1 is the radius of the inner use start point of the information use area A1.

[Problem that the invention seeks to solve]

In this way, in the conventional magnetic disk device, the C, S, and S areas B are set at the outer edge of the medium usable area W, so that the inner magnetic head element 2 is used as a magnetic head. Therefore, the information usage area, 4. becomes closer to the inner circumferential side of area W, and the information recording density increases (
Since the amount of information per revolution of the medium is constant regardless of its radius), the output resolution decreases, and furthermore, the decrease in the speed of the medium during information processing causes a decrease in the output.

To solve this problem, a magnetic disk device shown in FIG. 6 is also used. In this case, the C, S, and S areas B1 are set at the inner peripheral end of the medium usable area W, and it is easy to realize this with a thin film magnetic head similar to that shown in FIG. However, in this case, information use area A! is smaller than A1 in Figure 2 (smaller by the same distance as B1), resulting in extremely inefficient usage.R
, is information usage area A! This is the radius of the starting point on the inner circumferential side of .

[Means for solving problems]

The present invention aims to provide a magnetic disk device that can solve the above-mentioned problems, and as a means for that purpose, it is possible to set the inner peripheral side end of the usable area of the medium to the C, S, and S areas. Both (-1) A configuration is adopted in which the magnetic head element on the far side from the center of rotation of the medium is used as a magnetic head.

[Effect]

By adopting the above configuration, C and S in the media usable area
, the entire area on the outer circumferential side of the S area is used as an information use area.

〔Example〕

The invention will now be described in detail with reference to FIG.

FIG. 1 is a front view of main parts of a magnetic disk device according to the present invention, in which 11 is a disk-shaped medium, 12 is an inner thin-film magnetic head element, 13 is an outer thin-film magnetic head element, and 14 is a slider. , 15 is a support member.

As is clear from this figure, in the present invention, C and S of the medium 11 are
, S area B, is set at the inner circumferential end of the medium usable area W and is located at .degree. Further, the outer thin film magnetic head element 16 is used as a magnetic head.

Since the information use area A1 is closer to the outer circumference of the area W in this way, the information recording density is lower than in the case of FIG. 2, and the output increases due to the increase in medium speed during information processing. In addition, since the thin film magnetic head element 16 on the outer circumferential side is used as a magnetic head (=), all parts of the medium usable area W other than the C, S, and S areas B1 can be used as the information use area AI. Therefore, usage efficiency improves.

In the above explanation, an example of a thin film magnetic head was described, but
The present invention is also applicable to other conventional bulk type magnetic heads.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to achieve the following various excellent effects.

(By setting the 11C, S, and S areas at the inner edge of the usable area of the medium, the information recording density is reduced and the medium speed during information processing is increased, so the output resolution It is possible to improve the power output and increase the output.

(2) Since the outer magnetic head element is used as a magnetic head in connection with the C, S, and S area settings, it is possible to improve medium usage efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of a magnetic disk device showing an embodiment of the present invention, and FIGS. 2 and 3 are front views showing the main parts of various conventional magnetic disk devices. 12 and 13 are magnetic head elements, 14 is a slider,
15 is a support member, W is a medium usable area, B is C, S
, S area, and A1 are information use areas.

Claims (1)

[Claims] In a magnetic disk drive in which a plurality of contact start/stop type magnetic head elements are arranged on the same slider that can move forward and backward along a disc-shaped medium, the inner circumferential end of the usable area of the medium is used as a magnetic head land ink. A magnetic disk device characterized in that the magnetic head element is set in a region and the magnetic head element on the far side from the center of rotation of the medium is used as a magnetic head.