JPH02273304A - Magnetic head - Google Patents

Abstract

PURPOSE:To easily obtain an optimal gap depth by arranging a conductive contact member at a depth position to be the medium sliding surface of a magnetic head core. CONSTITUTION:A magnetic head is equipped with a magnetic head core 1 having an erase gap 2 and a read/write gap 3, and sliders 5a and 5b holding the magnetic head core 1 on the both sides, and a grinding work surface 11 over the magnetic head core 1 and the sliders 5a and 5b is ground to the position of the optimal depth of the gaps 2 and 3, and a medium sliding surface 11a is molded in the same way as usual. When the grinding work surface 11 is ground, a conductive contact member 4, which is electrically made contact with a conductive grinder 9 and constitutes a grinding completing time detecting circuit 13, is made independent of the magnetic circuit of the magnetic head, and the grinder having such a member 4 is used at the time of working. In addition, by providing the conductive contact 4 at the position of a maximal depth 6 of the gaps 2 and 3 to be the medium sliding surface 11a of the magnetic head core 1, the grinding is automatically stopped when the optimal gap depth 6 is obtained, and thus the control of the grinding is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and more particularly to a magnetic spatula 1-core used in a magnetic head.

[Conventional technology]

FIG. 4 is a perspective view of a conventional magnetic head core.

FIG. 5 is an assembled perspective view of the magnetic head core 12 and sliders 5a and 5b. In the figure, a magnetic spatula 1- is equipped with a magnetic head core 12 having an erase gap 2 and an erase gap 1 to a lie 1-3, and sliders 5a and 5b that hold the magnetic head core 12 from both sides. 5a and 5b is ground to the optimal depth position of the gaps 2 and 3 to form a medium sliding surface.

[Problem to be solved by the invention]

In the above-mentioned conventional methods for manufacturing magnetic head cores, since grinding is carried out with the sliders 5a and 5b for holding the magnetic head core 12, it is not possible to measure the gap depth after grinding. There is no other way than to manage the grinding time, and there is a drawback that the amount of grinding changes due to variations in various conditions such as jamming of the grindstone and errors in the grinding time, resulting in large variations in the gap depth.

An object of the present invention is to provide a magnetic head 1 which solves the above problems.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a magnetic head core having a beam-torite gap and a slider that holds the magnetic head core from both sides, and a cut surface extending between the magnetic head core and the slider is set to the optimum depth of the gap. In a magnetic head formed by grinding to a position to form a medium sliding surface, the magnetic head core electrically contacts a conductive grindstone that grinds the cut surface to form a conductive grinding surface that constitutes a detection circuit at the end of grinding. The magnetic head has a conductive contact member independent from the magnetic circuit of the magnetic head, and the conductive contact member is disposed at a depth position of the magnetic head core that becomes the medium sliding surface.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a magnetic head core according to the present invention, and FIG. 2 is an assembled perspective view of the magnetic head core and slider according to the present invention.

In the figure, the magnetic spatula l< according to the present invention includes a magnetic head core having an erase gap 2 and a magnetic spatula I to gap 3, and sliders 5al and 5b that hold the magnetic spatula 1 and the core 1 from both sides, The cutting surface 1 extending between the magnetic head core 1 and the sliders 5a and sb is ground to the optimum depth 6 of the caps 2 and 3 to form the medium sliding surface 1.
The point in which 1a is formed is the same as in the conventional case.

The magnetic head core according to the present invention has two surfaces 11
It has a conductive contact member 4 independent from the magnetic circuit of the magnetic head, which constitutes a detection circuit for detecting the end of grinding by electrically contacting the conductive grindstone 9 for cutting The conductive contact member 4 is connected to the magnetic head 1 to the medium sliding surface 1 of the core 1.
1. It is arranged at the optimum depth 6 of the gaps 2 and 3, which is a.

In FIG. 3, when the conductive grindstone 9 and the conductive contact member 4 come into contact, the relay 13a of the detection circuit 13 is activated.
The cutting machine 14 is set to stop driving and grinding of the cut surface 11 by the conductive grindstone 9 is stopped, and the cut surface 11 is ground in this state. 8 indicates the initial gap depth. When the grinding amount 7 reaches 0, the conductive contact member 4 and the conductive grindstone 9 come into electrical contact, the relay 13a of the detection circuit 13 is activated, the rotation of the conductive grindstone 9 is stopped, and the cutting process is started. Grinding of surface 11 is completed. Therefore, there is no need for time management, and the optimum gap depth 6 can be obtained accurately and easily.

In each figure, a read/write gap 3 and an erase gap 2 are shown, but the same applies to a magnetic head core having only a read/write gap 3.

〔Effect of the invention〕

According to the above-described Yoshiko present invention, grinding can be automatically stopped at the optimum amount of grinding, and there is no need to manage the amount of grinding of the magnetic head core based on the grinding time, so it is easy to find the optimum gap depth. There is an effect that can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a magnetic head core according to the present invention, FIG. 2 is an assembled perspective view showing the magnetic head core and slider of the present invention, FIG. 3 is a sectional view showing a grinding state, and FIG. 4 is a conventional magnetic head core. FIG. 5 is an assembled perspective view of a conventional magnetic head core and a slider. 1. Magnetic head core 2. Erase gap 3.
Read/write gap 4 conductive contact member 5a,
5b...Slider 6 Optimal gap depth 9.
... Conductive grindstone 11 ... Cutting surface 11a.
...Medium sliding surface 13...Detection circuit at the end of grinding

Claims (1)

[Claims] (1) A magnetic head core having a read/write gap and a slider that holds the magnetic head core from both sides, and a cut surface extending between the magnetic head core and the slider is ground to the optimum depth position of the gap to form a media slider. In the magnetic head formed by forming a moving surface, the magnetic head core connects a conductive contact member that electrically contacts a conductive grindstone that grinds the cutting surface and constitutes a detection circuit at the end of grinding of the magnetic head. 1. A magnetic head having a conductive contact member independent from a magnetic circuit, the conductive contact member being disposed at a depth position that becomes a medium sliding surface of a magnetic head core.