JPH03273507A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain a magnetic head which can minimize the magnetic path length with respect to the area of a winding window and has high reproduction efficiency by forming the winding window of a magnetic core to an approximately circular shape. CONSTITUTION:The winding window 4 of the magnetic core 1 having a recording and reproducing gap 2 is formed in an approximately circular shape and a coil 3 is wound in the winding window 4. Thereby the magnetic path length of the magnetic core 1 along the inside wall of the winding window 4 with respect to the area of the winding window 4 is minimized. The reproduced output per inductance, i.e. the reproduction efficiency of the magnetic head is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head, and more particularly to the shape of a magnetic core of a magnetic head used in a magnetic disk device.

[Conventional technology]

Conventionally, this type of magnetic head has a recording/reproducing gap on the side facing the recording medium, and has a coil formed by winding a magnetic core made of a magnetic material such as ferrite.

Further, the window portion of the magnetic core on which the wire is wound generally has a substantially rectangular shape.

[Problem to be solved by the invention]

In the conventional magnetic head described above, it is necessary to shorten the magnetic path length of the magnetic core as much as possible in order to improve its reproduction efficiency. On the other hand, in order to obtain a high reproduction output voltage, it is necessary to increase the number of turns of the coil as much as possible. The upper limit of the number of turns of this coil is determined by the area of the winding window of the magnetic core. That is, in order to obtain a high-performance magnetic head, a magnetic core having a short magnetic path length and a wide winding window is required. From this point of view, conventional magnetic heads have a disadvantage in that the magnetic path length is long compared to the area of the winding window, so the reproduction output voltage is small and the reproduction efficiency is low.

[Means to solve the problem]

The present invention provides a magnetic head comprising an annular magnetic core having a recording/reproducing gap and a coil wound around the magnetic core, characterized in that a winding window shape on an inner wall of the magnetic core is approximately circular. do.

The recording medium also includes a slider made of a magnetic material that obtains a levitation force by an airflow generated as the recording medium rotates, and the slider and the magnetic core form a magnetic circuit.

〔Example〕

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

FIG. 1 is a sectional view showing one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a magnetic core having a recording/reproducing gap 2, and a winding window 4 of this magnetic core 1 has a substantially circular shape. A coil 3 is wound around the winding window 4. Since the winding window 4 has a substantially circular shape in this manner, the length of the magnetic path of the magnetic core l along the inner wall of the winding window 4 can be minimized with respect to the area of the winding window 4.

FIG. 2 is a diagram showing the relationship between the magnetic path length of the magnetic head and the reproduction output per inductance. In FIG. 2, it is shown that in order to increase the reproduction output per inductance, that is, the reproduction efficiency of the magnetic head, it is necessary to shorten the magnetic path length of the magnetic core.
The structure secures the winding window area necessary for winding the coil and minimizes the magnetic path length.

FIG. 3 is a perspective view showing an example in which the present invention is applied to a magnetic head for a magnetic disk device. In FIG. 3, the magnetic head of the present invention has a slider section 5 made of a magnetic material and which obtains a levitation force by the airflow generated as the recording medium rotates.The slider section 5 and the magnetic core 1 form a magnetic circuit. is formed, and has a recording/reproducing gap 2.

Further, the magnetic core 1 and the slider portion 5 are provided with a winding window 4 having a substantially circular shape, and the winding window 4 has an nI structure in which a coil 3 is wound.

〔Effect of the invention〕

As explained above, according to the magnetic head of the present invention, by making the winding window shape of the magnetic core substantially circular, it is possible to minimize the magnetic path length with respect to the area of the winding window. This has the effect of providing a magnetic head with high reproduction efficiency.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, FIG. 2 is a diagram showing the relationship between the magnetic path length of a magnetic head and the reproduction output per inductance, and FIG. 3 is a cross-sectional view showing an embodiment of the present invention. FIG. 2 is a perspective view showing an example applied to a magnetic head. 1... Magnetic core, 2... Recording/reproducing gap, 3...
... Coil, 4... Winding window, 5... Slider section. Tsuz t or t pear/horse) i enter'4 shift. Figure/Figure

Claims (1)

[Claims] 1. A magnetic head comprising an annular magnetic core having a recording/reproducing gap and a coil wound around the magnetic core, wherein the winding window shape on the inner wall of the magnetic core is approximately circular. A magnetic head characterized by: 2. The magnetic recording medium according to claim 1, further comprising a slider made of a magnetic material and which obtains a buoyancy force by an air flow generated as the recording medium rotates, and wherein the slider and the magnetic core form a magnetic circuit. head.