JPH0554581A - Floating type magnetic head - Google Patents

Abstract

PURPOSE:To enhance the mechanical strength of the core of the floating type magnetic head and to reduce the size and weight of the magnetic head while enhancing magnetic efficiency CONSTITUTION:The C core 2 as one magnetic material block of the floating type magnetic head constituted by joining the two magnetic material blocks holding a magnetic gap 4 is so formed that the width size in a track width direction is narrowed gradually from the joint surface 3 to the side opposite from the other magnetic material block 1.

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 for recording or reproducing information in a floating state on a rotating disk medium such as a magnetic disk drive device.

[0002]

2. Description of the Related Art A conventional floating magnetic head will be described with reference to FIG. FIG. 5 shows a flying magnetic head in which three monolithic rails 6, 7, and 8 are formed. Magnetic substance block 1 and C core which is the other magnetic substance block
2 are bonded to each other by glass or the like with the magnetic gap 4 and the bonding surface 3 as mating surfaces. The C core 2 is provided with a winding portion 5 which is a space for winding the winding.

The C core 2 is the magnetic block 1 from the joint surface 3.
It is formed almost vertically on the opposite side. Therefore, as the levitation type magnetic head is miniaturized, the width of the C core 2 in the track width direction also needs to be narrowed, the area of the mating surface of the bonding surface 3 becomes small, and the bonding strength becomes weak, and C At the same time, the problem that the core 2 is peeled off from the joint surface is likely to occur, and at the same time, the magnetic resistance increases and the magnetic efficiency deteriorates. If the width of the C core 2 is increased, the workability of the winding is deteriorated.

[0004]

Recently, as magnetic disk drive devices have become smaller and thinner, smaller floating magnetic heads have been required.

As the size of the floating magnetic head becomes smaller, the shape of the C core becomes smaller, and conversely, when a high output is required, it is necessary to increase the number of windings. I need it. As a result, the shape of the C core becomes smaller and the winding portion becomes larger, so that the volume of the C core itself becomes smaller and the cross-sectional area becomes smaller. As a result, the mechanical strength of the C core is weakened, and the deterioration of the quality such as chipping and cracking is likely to occur, and at the same time, the C core is easily peeled off from the joint surface.

Further, the reduction in the cross-sectional area of the C core forming the magnetic path leads to an increase in the magnetic resistance, resulting in a deterioration in the magnetic efficiency.

As described above, when the conventional C core is formed perpendicularly to the joint surface, the mechanical strength of the C core becomes weaker as the flying magnetic head becomes smaller, and the C core is removed from the joint surface. There is a problem that peeling easily occurs and the magnetic efficiency also deteriorates.

The object of the present invention is to reduce the size of the levitation type magnetic head without deteriorating the winding work, increasing the mechanical strength of the C core, preventing the peeling of the C core from the joint surface, and improving the quality. It is an object of the present invention to provide a levitation type magnetic head capable of improving the magnetic resistance as much as possible and preventing deterioration of magnetic efficiency.

[0009]

In order to solve the above problems, the present invention relates to a levitation type magnetic head in which two magnetic material blocks are joined with a magnetic gap interposed therebetween.
One magnetic material block is formed so that the width dimension in the track width direction is gradually narrowed from the bonding surface to the side opposite to the other magnetic material block.

[0010]

In the floating magnetic head as described above, one magnetic material block is formed so as to gradually narrow the width dimension in the track width direction from the joining surface toward the opposite side to the other magnetic material block. A large cross-sectional area is secured in the vicinity of the joint surface of the one magnetic body block to enhance its mechanical strength and prevent the one magnetic body block from being peeled off, and at the same time, the magnetic resistance is suppressed to be small to reduce the magnetic efficiency. It is possible to reduce the size and weight of the floating magnetic head while preventing the above.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Figure 1
1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a side view.

This levitation type magnetic head is called a monolithic type, and a magnetic substance block 1 made of a material such as Mn-Zn ferrite and a C core 2 as the other magnetic substance block have a magnetic gap 4 and a joint surface 3. Are joined to each other by glass or the like. Also, C core
The substantially C-shaped shape 2 forms a winding portion 5 which is a space for winding the winding.

The C core 2 is connected to the magnetic block 1 from the joint surface 3.
The width (the length direction of the joint surface 3 in FIG. 1A, that is, the track width direction) is gradually reduced toward the opposite side.

According to the above contents, a large cross-sectional area is secured in the vicinity of the joint surface of the C core 2, the mechanical strength of the C core 2 is increased, the peeling of the C core 2 is prevented, and the magnetic resistance is kept small. It is possible to reduce the size and weight of the levitation type magnetic head while preventing a decrease in magnetic efficiency.

Next, a process of manufacturing the floating magnetic head shown in FIG. 1 which is an embodiment of the present invention will be described with reference to FIG.

The process of manufacturing the floating magnetic head is shown in FIG.
FIG. 2A is a perspective view of the floating magnetic head shown in FIG. 1 manufactured in the order of FIGS. 2A to 2G, which is an embodiment of the present invention.

The contents will be described below in the order of steps.

FIG. 2 (a) shows a magnetic block 100 made of a magnetic material such as Mn-Zn ferrite.
The magnetic block 100 is a material for manufacturing a floating magnetic head.

FIG. 2B shows a magnetic body block 101 formed by cutting the magnetic body block 100 as a material for forming the magnetic body block 1 and a C core 2 which is the other magnetic body block. As a material for doing so, a magnetic block 102 formed by cutting or the like from the magnetic block 100 is shown.

FIG. 2C shows a magnetic material block 102 with a C core.
2 shows a magnetic body block 202 formed by cutting a groove to be the winding portion 5 of No. 2 and a magnetic body block 101 which is a material of the magnetic body block 1.

FIG. 2D shows a state in which the magnetic material block 101 and the magnetic material block 202 are bonded to each other on the bonding surface 3 by glass or the like.

FIG. 2 (e) shows a state in which a magnetic body block 302 for forming the C core 2 as a floating magnetic head is formed by cutting or the like. At this time, the magnetic body block 302 is bonded to the bonding surface 3
It is formed so that the width dimension in the track width direction is gradually increased from the surface opposite to the surface.

FIG. 2 (f) shows a state in which the grooves 9 and 10 are formed by cutting or the like.

FIG. 2G shows a state in which the state shown in FIG. 2F is further processed as a floating magnetic head to obtain a final shape.

A large number of floating magnetic heads shown in FIG. 2G can be formed by joining the magnetic block 101 and the magnetic block 202 shown in FIG. 2D.

The rail 6 contains a magnetic gap 4,
The width of the surface of the rail 6 on which the magnetic gap 4 is formed is called the track width.

FIG. 3 is a perspective view showing the levitation type magnetic head of one embodiment described with reference to FIGS.

FIG. 3 shows the levitation type magnetic head in which the winding portion 5 is provided with the winding wire 11.

FIG. 4 is a perspective view of a levitation type magnetic head showing another embodiment, which is of a monolithic type in which two rails 12 and 13 are formed.

In FIG. 4, as in the case of FIG. 3, the C core 2 is made of glass such that it is bonded to the magnetic block 1 made of a material such as Mn--Zn ferrite by using the bonding surface 3 and the magnetic gap 4 as mating surfaces. And the like, and is formed such that the width dimension in the track width direction is gradually narrowed from the joint surface 3 toward the side opposite to the magnetic body block 1. In this case, the C core 2 forming the magnetic gap 4
Also, both sides of the track width of the magnetic block 1 are formed of glass 15 or the like.

[0032]

As described above, in the levitation type magnetic head according to the present invention, the width of one magnetic material block is gradually narrowed in the track width direction from the joining surface to the side opposite to the other magnetic material block. Since it is formed as described above, a large cross-sectional area is secured in the vicinity of the joint surface of the one magnetic body block, its mechanical strength is increased, and peeling of the one magnetic body block is prevented, and at the same time, the magnetic resistance is increased. It is possible to achieve reduction in size and weight of the levitation type magnetic head while suppressing the reduction in size to prevent reduction in magnetic efficiency.

[Brief description of drawings]

1A and 1B show a levitation type magnetic head according to an embodiment of the present invention, in which FIG. 1A is a plan view, FIG.
(C) is a side view.

FIG. 2 is a perspective view showing a product in each step for manufacturing a levitation type magnetic head according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a levitation type magnetic head according to an embodiment of the present invention.

FIG. 4 is a perspective view of a floating magnetic head showing another embodiment of the present invention.

FIG. 5 shows a conventional floating magnetic head, (a)
Is a plan view, (b) is a front view, and (c) is a side view.

[Explanation of symbols]

 1 magnetic material block 2 C core (one magnetic material block) 3 bonding surface 4 magnetic gap

Claims (1)

[Claims] 1. A levitation type magnetic head comprising two magnetic material blocks joined to each other with a magnetic gap interposed therebetween, wherein one magnetic material block is gradually tracked from the joining surface to the opposite side to the other magnetic material block. A levitation type magnetic head, characterized in that it is formed so as to narrow the width dimension in the width direction.