JPH07161022A - Floating magnetic head and its manufacture - Google Patents

Abstract

PURPOSE:To improve adhesive strength of a magnetic gap part and to reduce man-hour of track width regulation. CONSTITUTION:Rails 18 and 19 for floating are provided on an upper surface of an I-shaped core 17, and a groove 23 is provided in an end surface 22 on the air outflow side of the rail 18, and then a C-shaped core 24 provided with a groove 25 is joined to the end surface 22 on the air outflow side of the rail 18. A magnetic gap 28 is provided with glass 27 via a gap forming material between the end surface 22 of this joined rail 18 and an end surface 26 of the C-shaped core 24, while a track width 29 is provided by narrowing the rail 18. Then, a recess 31 is provided over a distance between a taper 30 of this track width 29 and the end surface 22 of the other side of the rail 18 and also the end surface 26 of the C-shaped core 24, and this recess 31 is filled with glass 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating magnetic head used in a fixed magnetic disk device and the like and a manufacturing method thereof.

[0002]

2. Description of the Related Art A conventional floating magnetic head will be described below with reference to the drawings. FIG. 3 is a perspective view of a conventional floating magnetic head. In FIG. 3, 1 is MnZn
This is an I-shaped core made of ferrite, and the I-shaped core 1 is provided with levitation rails 2 and 3 on the upper surface thereof, respectively, and moreover, slopes 4 are provided at the respective air inflow side end portions of the rails 2 and 3. , 5 are provided respectively. A groove 7 to be a winding window is provided on the end face 6 of the I-shaped core 1 on the air outflow side of the rail 2, and the end face 6 of the rail 2 on the air outflow side is made of the same material as the I-shaped core 1. The C-shaped core 8 is joined to the C-shaped core 8, and the C-shaped core 8 is provided with the groove 9 serving as a winding window.

The end face 6 of the rail 2 on the air outflow side and the end face 10 of the C-shaped core 8 are opposed to each other, and a magnetic gap 12 is formed between the end face 6 and the end face 10 by a glass 11 through a gap forming material. It is provided. Further, the magnetic gap 12 provided in the rail 2 is provided with a track width 13 which is a narrowed width of the rail 2, and the track width 13 is recessed from the end face 6 on the air outflow side of the rail 2 to the air inflow side. 14 is provided, and a side surface of the C-shaped core 8 is provided with an inclined surface 16 that becomes wider as it moves away from the medium facing surface 15.

[0004]

With the above-mentioned conventional structure, the flatness of the disk contact surface of the magnetic head can be obtained. However, since the area where the end face 6 on the air outflow side of the rail 2 of the I-shaped core 1 and the end face 10 of the C-shaped core 8 face each other is small, the adhesive strength is weak, and the magnetic gap 12 part is removed from the magnetic gap 12 portion in a process such as winding. There is a problem that it is easily broken and that it takes man-hours to process the slope 16 to regulate the track width 13 of the magnetic head.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a floating magnetic head and a manufacturing method in which the adhesive strength of the magnetic gap portion is improved and the man-hours for controlling the track width are reduced. .

[0006]

In order to achieve this object, the present invention provides an I-shaped core having a levitation rail and a C-shaped core joined to the air outflow end of the levitation rail via a magnetic gap. And a recess provided across the I-shaped core and the C-shaped core, and a taper provided on the outer surface of the rail, and the recess is filled with glass.

Further, in the present invention, a step of forming a groove serving as a winding window on a surface of the I-shaped core block made of ferrite, the surface facing the gap, and forming a plurality of recesses in the diagonal direction with the groove. A step of forming a groove to be a winding window on a surface of the core block made of the same material, the surface facing the gap, and forming a plurality of recesses on the surface in the oblique direction with the groove to form a C-shaped core block. A step of forming a gap forming material on the surface of the I-shaped core block that faces the gap, and a surface of the I-shaped core block on which the gap forming material is formed and a surface of the C-shaped core block that faces the gap. But I said
A rod-shaped glass is placed in the valley between the groove serving as the winding window of the V-shaped core block and the groove serving as the winding window of the C-shaped core block, and the glass is melted to fill each of the depressions with the glass. And joining the I-shaped core block and the C-shaped core block to form a gap bar having a magnetic gap; and cutting the gap bar in a direction perpendicular to the magnetic gap to form a slider block. Forming a rail on the upper surface of the slider block in a direction perpendicular to the magnetic gap to form a rail, and forming a taper on one side surface of the rail to regulate the track width.

[0008]

With this structure, the adhesive strength of the magnetic gap portion is improved, and the man-hour for regulating the track width can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a floating magnetic head according to an embodiment of the present invention. In FIG. 1, 17 is M
This is an I-shaped core made of nZn ferrite, and the I-shaped core 17 is provided with levitation rails 18 and 19 on the upper surface, respectively, and the rails 18 and 19 each have an inclined surface at the end of the air inflow side. 20 and 21 are provided respectively. A groove 23 that serves as a winding window is provided on an end surface 22 of the I-shaped core 17 on the air outflow side of the rail 18, and the end surface 22 of the rail 18 on the air outflow side has an I
A C-shaped core 24 made of the same material as the C-shaped core 17 is joined, and the C-shaped core 24 is provided with a groove 2 which serves as a winding window.
5 are provided.

The end face 22 on the air outflow side of the rail 18 and the end face 26 of the C-shaped core 24 are opposed to each other, and a magnetic gap 28 is formed between the end face 22 and the end face 26 with a glass 27 by a gap forming material. It is provided. Further, the magnetic gap 28 provided in the rail 18 is provided with a track width 29 that narrows the width of the rail 18, and the end face 22 of the rail 18 opposite to the taper 30 of the track width 29 and the C-shaped core. A recess 31 is provided over the end surface 26 of 24, and the recess 31 is filled with glass 32.

A method of manufacturing such a floating magnetic head of the present invention will be described with reference to the drawings. Figure 2 (a)
FIG. 6 is a perspective view of core block processing of a floating magnetic head according to an embodiment of the present invention. As shown in FIG. 2 (a),
A groove 35, which will be a winding window, is formed on a surface 34 of the I-shaped core block 33 made of ferrite, which is a surface facing the gap.
The groove 3 serving as the winding window is formed on the surface 37 which is the gap facing surface of the core block 36 made of the same material as the character-shaped core block 33.
8 to form a C-shaped core block 39.

Further, a groove 35 to be a winding window and a plurality of recesses 40 are formed in a diagonal direction on a surface 34 of the I-shaped core block 33 which faces the gap, and a surface of the I-shaped core block 33 which faces the gap. The gap forming material 41 is formed on the surface 34. Further, a groove 38 to be a winding window and a plurality of recesses 42 are formed in an oblique direction on a surface 37 of the C-shaped core block 39 which is a surface facing the gap.

Next, FIG. 2B is a perspective view of forming a magnetic gap of a floating magnetic head according to an embodiment of the present invention. As shown in FIG. 2B, the I-shaped core block 33
34 and the C-shaped core block 3 which is the gap facing surface of
9 and a surface 37 which is a gap facing surface of 9 and is a groove 35 which becomes a winding window of the I-shaped core block 33 which is butted.
A rod-shaped glass 43 is placed in the valley between the groove 38 and the groove 38 serving as a winding window of the C-shaped core block 39, and the glass 43 is melted to fill the recesses 40 and 42 with the glass 43. The core block 33 and the C-shaped core block 39 are joined. By joining, a gap bar 45 having a magnetic gap 44 is formed between the I-shaped core block 33 and the C-shaped core block 39. The gap bar 45 is cut in a direction perpendicular to the magnetic gap 44 by a dotted line 46 to form a slider block 47.

Next, FIG. 2 (c) is a perspective view of the completed processing of the floating magnetic head in one embodiment of the present invention. Figure 2
As shown in (c), a groove 48 is formed on the upper surface of the slider block 47 in a direction perpendicular to the magnetic gap 44 to form rails 49 and 50, respectively. In addition, rails 49,
Rails 4 with taper 51 on each side of 50
The widths of 9, 50 are regulated, and the track width 52 of the magnetic gap 44 is regulated on the rail 49. Further, the C-shaped core block 39 and the glass 43 in the portion shown by the dotted line 53
C and a part of the I-shaped core block 33 are removed.
The letter core 54 is formed to complete the floating magnetic head.

In this way, the surface 34 serving as the gap facing surface of the I-shaped core block 33 and the surface 37 serving as the gap facing surface of the C-shaped core block 39 are made to face each other, and the recesses 40 and 42 are filled with the glass 43. Magnetic gap 44
One of the sides of the track width 52 of the
Since the regulation No. 2 is formed by processing the taper 51 of the rail 49, the number of steps is reduced and the adhesive strength of the magnetic gap 44 is improved.

In this embodiment, the gap forming material 41 is I
Although it is formed on the V-shaped core block 33, it may be formed on the C-shaped core block 39, and further, the gap forming material 40 may be formed on both of the core blocks. In addition, recesses 40 and 42 are provided on the surface 34 that is the gap facing surface of the I-shaped core block 33 and the surface 37 that is the gap of the C-shaped core block 39. The recesses 40 and 42 are one I-shaped core. Only the block 33 may be used, and the depressions 40 and 42 may be arcuate or angular.

[0017]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the floating rail is I
A recess is provided so as to straddle the C-shaped core and the C-shaped core,
Since glass is filled into this recess to form one side of the track width, only the taper on the outer surface of the rail is processed to regulate the track width, reducing the man-hours and improving the adhesive strength of the magnetic gap part. The excellent floating magnetic head and manufacturing method can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view of a floating magnetic head according to an embodiment of the present invention.

FIG. 2A is a perspective view of core block processing of a floating magnetic head according to an embodiment of the present invention, and FIG. 2B is a perspective view of magnetic gap formation of a floating magnetic head according to an embodiment of the present invention. ) Is a perspective view of the completed processing of the floating magnetic head in one embodiment of the present invention.

FIG. 3 is a perspective view of a conventional floating magnetic head.

[Explanation of symbols]

 17 I-shaped core 18, 19, 49, 50 Rail 20, 21 Slope 22, 26 End face 23, 25, 35, 38, 48 Groove 24, 54 C-shaped core 27, 32, 43 Glass 28, 44 Magnetic gap 29, 52 track width 30, 51 taper 31, 40, 42 depression 33 I-shaped core block 34, 37 surface 36 core block 39 C-shaped core block 41 gap forming material 45 gap bar 46, 53 dotted line 47 slider block

Claims (2)

[Claims] 1. An I-shaped core having a levitation rail, a C-shaped core joined to an air outflow side end of the levitation rail via a magnetic gap, and provided over the I-shaped core and the C-shaped core. A floating magnetic head comprising: a recess formed therein; and a taper provided on an outer surface of the floating rail, wherein the recess is filled with glass. 2. The same material as in the step of forming a groove for forming a winding window on the surface of the I-shaped core block made of ferrite facing the gap and forming a plurality of recesses in the surface and the groove. Forming a C-shaped core block by forming a groove serving as a winding window on a surface of the core block that faces the gap and forming a winding window in the surface, and forming a C-shaped core block, and the I-shaped core. The step of forming a gap forming material on the surface of the block that faces the gap, and the surface of the I-shaped core block on which the gap forming material is formed and the surface of the C-shaped core block that faces the gap, are butted against each other. A rod-shaped glass is placed in the valley between the groove serving as the winding window of the I-shaped core block and the groove serving as the winding window of the C-shaped core block, and the glass is melted to form the front thereof. Filling the recess with the glass and joining the I-shaped core block and the C-shaped core block to form a gap bar having a magnetic gap; and cutting the gap bar in a direction perpendicular to the magnetic gap to form a slider. A step of forming a block,
Forming a rail on the upper surface of the slider block in a direction perpendicular to the magnetic gap to form a rail, and forming a taper on one side surface of the rail to regulate a track width for recording and reproduction. Floating magnetic head manufacturing method.