JPS63291210A - Magnetic head - Google Patents

Abstract

PURPOSE:To position a core to a low floating quantity side and to freely control a floating quantity difference, by reducing sliding plane width at a side where the core is embedded narrower than another sliding plane width. CONSTITUTION:A recording and reproducing core 1 is embedded in the medium travel direction run end of a sliding plane on one side of two sliding planes 2 and 3 to generate a floating direction, and the sliding plane width is formed narrower than that of the other side. By constituting a device in such way, it is possible to always set the sliding plane sides 2 and 3 at the low floating quantity sides, and to control the floating quantity difference freely corresponding to the difference of the sliding plane width. The sliding plane at a core side is positioned at the minimum floating quantity side by reducing the sliding plane width further. Also, it is preferable to position the sliding plane where the recording and reproducing core is to be embedded at an outer peripheral side in due consideration of a point to prevent the lowering of recording density from being generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an embedded magnetic head used for recording and reproducing in a magnetic disk storage device.
This invention relates to a floating magnetic head used in a stop method.

[Conventional technology]

Conventionally, in embedded magnetic heads used in contact, start, and stop methods in magnetic disk storage devices, the width of the sliding surface on the side where the storage/playback core is embedded is equal to the width of the sliding surface on the other side. And nine. Both groove surfaces generate levitation force by the rotation of the magnetic disk and float, creating a slight and constant gap.
- The flying height H@, which is the distance between the magnetic disk surface and the smooth surface, is calculated from the radius of the smooth surface path by the circumferential velocity (U, the spring load pressing the slider it-ω, If the smooth surface width is b, it is defined by the following simple formula.

The toe and flying height H. are proportional to the circumferential speed and smooth surface width, and are inversely proportional to the load. When an embedded magnetic head consisting of two smooth surfaces is floating, the circumferential speeds U in the above equation differ depending on the radius t of the two smooth surfaces.

[Problem that the invention seeks to solve]

In the above-mentioned conventional magnetic head, the width of the two sliding surfaces is the same, and the difference in circumferential speed between the sliding surfaces causes differences in flying force between individuals, resulting in an imbalance in flying height. At this time, if the recording/reproducing core is embedded in the outflow part of the smooth surface of the sword in the direction of medium travel, which has a high one-circumferential speed, it will cause problems.

The disadvantage was that losses increased.

[The tth way to solve the problem]

The magnetic head of the present invention is characterized by having two sliding surfaces near both end edges for generating a flying force, and recording and reproducing at the outflow end in the medium running direction of the 10,000 sliding surfaces of the T slider. In an embedded magnetic head having a structure in which a recording/reproducing core is embedded, the width of the sliding surface on the side where the recording/reproducing core is embedded is made narrower than the width of the other sliding surface.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention. A core for storage and reproduction is embedded in the flow end of the two smooth surfaces 2 and 3 in the medium running direction for generating levitation force, and
The width of the smooth surface is narrower than the width of the other smooth surface.

FIG. 2 is a model diagram of the slider at 1 o'clock when the slider floats due to the rotation of the magnetic disk and assumes a steady flying posture.

FIG. 3 μ is a model diagram of the 9 o'clock position in which the slider of the conventional embedded magnetic head is floated by the rotation of the magnetic disk and assumes a steady flying posture. In the case of Figure 3, H3 with a high flying height
If the recording/reproducing core is embedded in the smooth surface of the H-type, the H-type has the disadvantage that the lower flying height is the minimum flying height and the spacing loss increases.

By narrowing the sliding surface on the gold-embedded side of the core for recording and reproducing as in the present invention, the sliding surface can always be on the low flying height side, and mass production can also be achieved by using the difference in the sliding surface width. Can be controlled freely. Radius of 36m in 5 inch disk device
When applied to the innermost circumference of m, the width of the outer circumferential smooth surface in which the recording/reproducing core is embedded is t-A, the other tB, and the distance between both groove surfaces is approximately 2.75 mm, then J3 = α928A. The floating mass production of both sliding surfaces becomes zero, and when the sliding surface width At is further narrowed, the core side sliding surface becomes the minimum flying height side. In addition, records,
The smooth surface on which the reproducing core is embedded is preferably located on the outer circumferential side, also from the viewpoint of reducing linear recording density.

〔Effect of the invention〕

As explained above, the present invention has the effect of allowing the core to be brought to the lower flying height side by making the smoothing surface width on the side where the core is embedded narrower than the other side, and also has the effect of freely controlling floating mass production. There is an effect that can be done.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a sectional view showing how a slider according to an embodiment of the invention lifts up powder due to the rotation of a magnetic disk, and Fig. 3 is a perspective view showing a conventional slider. FIG. 3 is a cross-sectional view showing how the magnetic disk levitates due to rotation. 1...core, 2,3...smooth surface, 4...
····Slider. 5...Kenki Tisku.・
Nee＼〆゛ ′ Agent Patent Attorney Uchihara Onsho 1 Figure

Claims (1)

[Claims] In an embedded magnetic head having a structure in which a recording/reproducing core is embedded in the outflow portion in the medium running direction of one of the slider surfaces in which two slide surfaces for generating a flying force are formed near both end edges. An embedded magnetic head characterized in that the width of the smooth surface on the side in which the recording/reproducing core is embedded is narrower than the width of the other smooth surface.