JPH05101363A - Floating type magnetic head - Google Patents

Abstract

PURPOSE:To improve the workability of wiring and to prevent a short circuit from generating by lengthening the shape of the recessed groove for winding of a slider end part perpendicularly from a core piece side and bending it toward the slider end part at a specified angle from an intermediate part. CONSTITUTION:The magnetic gap 4 of a core piece 5 built in the rear end part 1a of a slider 1 is exposed on the sliding face of a rail shape floating part 2. The recessed groove 11 for winding in the rear end part 1a enters perpendicularly from the face 1b of the core piece 5 side as shown by broken line in figure and inclines toward the rear end part 1a at the angle of almost theta=135 degree in the intermediate part. Further, the groove 11 escapes from the side face 1c of the slider 1 in the vicinity position of the rear end part and forms a slope 14, thus, becomes the shallow recessed groove 11 with a depth (d) to the rear end part 1a in the vicinity of the side face 1c. Thus, a large space for winding is obtained only in the vicinity of the core piece 5 and the workability of winding is improved and the generation of a short circuit defect by the scratch of wire rod is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flying type magnetic head, and more particularly to a slider rear end having a recessed groove for embedding a core piece in the rear end of the non-magnetic slider on the downstream side in the magnetic medium traveling direction and winding the core piece. The present invention relates to a slider structure of a composite type magnetic head formed in a portion.

[0002]

2. Description of the Related Art A composite type magnetic head used for recording and reproducing data on and from a hard disk is generally a slider having at least two rail-shaped floating portions on a surface facing a magnetic medium, and one of the rail-shaped floating portions. The core piece embedded in the rear end portion of the slider in correspondence with the position and the winding wound around the core piece. A concave groove for winding is formed at the rear end of the slider, and the winding for the core piece is for this winding at the final stage after the core piece is mounted on the slider and the rail-shaped floating portion is polished. It is made through a groove.

FIGS. 4 and 5 are a plan view and a side view showing an example of a conventional composite type magnetic head as seen from the magnetic medium contact surface side. A slit extending in the magnetic medium traveling direction is provided at a slider rear end 1a (trailing edge) on one side of the pair of rail-shaped floating portions 2, 3 of the slider 1 on the downstream side in the magnetic medium traveling direction, and a magnetic gap is formed in this slit. A core piece 5 with 4 is inserted. A triangular winding groove 8 is formed on the slider rear end portion 1a so that one side portion 6 of the core piece 5 and the window 7 of the core piece for applying the winding 15 to the one side portion are partially exposed from the slider 1. Has been formed. In this conventional example, the groove bottom 8 of the winding groove 8 is formed.
A is linearly formed from the approximate center position of the slider rear end portion 1a to the slider piece side surface 1b on the core piece mounting side at an angle of about 30 °. In addition, this straight groove bottom 8
It may be formed so as to have a substantially arc-shaped groove bottom instead of a.

In the conventional example shown in FIG. 6, the rail-shaped floating portions 2 and 3 of the slider 1 and the core piece 5 mounted on one of the floating portions 2 are the same as those in FIGS. 9
Penetrates from the side surface 1b on the core piece side of the slider 1 to the slider side surface 1c on the opposite side and in parallel to the slider rear end portion 1a. The winding is passed through the groove 9 into the window hole of the core piece 5, and one side portion 6 of the core piece 5 is
Wrapped around.

[0005]

In recent years, the magnetic head of this type has been downsized as a whole, in particular, the overall thickness of the slider has been reduced, and the winding space restricted by the winding groove at the rear end of the slider is narrow. Tends to be. For this reason, the wire rod hits the ridge of the concave groove and is damaged during winding, causing a short circuit with the core piece. In order to secure a sufficient winding space under the trend of miniaturization of the slider, it is necessary to make the winding recessed groove at the rear end of the slider large, but since the slider thickness is thin as described above. There is a limit to the groove width (direction perpendicular to the magnetic medium), and the depth of the groove bottom must be gradually increased. However, if the groove bottom of the concave groove is made deeper, for example, in the case of FIGS. 4 and 5, the concave groove 8 is inclined linearly at the core piece 5 portion, and therefore the groove becomes deeper than necessary at this portion. The other core piece side portion 10 of the core piece that must be buried on the slider side is exposed when viewed from the slider side surface 1b as shown in FIG. 5, and the holding property of the core piece 5 deteriorates. In particular, since the cutout length of the concave groove 8 becomes long at the slider outermost portion 1b on the core piece side, the thicknesses T ₁ and T ₂ of the sliders on the upper and lower surfaces sandwiching the concave groove 8 become thin and long, which causes a problem of frequent chipping defects. Will occur. Further, when the end of the concave groove 8 which is inclined in a triangular shape as shown in FIGS. 4 and 5 ends at the rear end portion 1a of the slider 1, dirt is retained in the concave groove, which causes deterioration of characteristics. Further, as shown in FIG. 6, in the case of the groove 9 penetrating both sides in parallel to the slider rear end 1a, the rail-like floating portion 2, since the unnecessary portion for winding is largely cut off. The surface grinding of No. 3 causes a problem that the flatness of the sliding surface of the floating portion is reduced.

In view of the above-mentioned problems, the present invention aims to enlarge the winding space while ensuring a sufficient thickness of the slider rear end portion even if the slider is miniaturized, thereby facilitating the winding work. An object of the present invention is to provide a floating magnetic head which prevents chipping defects and short-circuiting of windings, improves the flatness of the sliding surface of the floating portion, and easily removes dirt in the winding groove.

[0007]

According to the present invention, a core piece is attached to a slider end portion which is closer to one side from the center of the slider and is downstream in the magnetic medium traveling direction, and a winding groove is provided at the slider end portion. In the levitation type magnetic head in which the ridge is formed, the winding groove extends vertically from the slider side surface on the core piece side and is bent toward the slider end portion at an angle of 90 ° to 170 ° from the middle portion thereof. Form magnetic head can be obtained.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a plan view of a floating magnetic head according to an embodiment of the present invention as viewed from the sliding surface side, and FIG. 2 is a side view of the magnetic head shown in FIG. 1 near the core piece. In this embodiment, the non-magnetic slider 1 is formed by injection molding, a pair of rail-shaped floating portions 2, 3 are formed on the surface (sliding surface) facing the magnetic medium, and the core piece is formed at the slider rear end 1a. A slit groove for burying 5 is formed as in the conventional example shown in FIGS. The magnetic gap 4 of the core piece 5 is the sliding surface (air bearing surface) of one rail-shaped air bearing portion 2.
Is exposed to. In the present embodiment, the winding groove 11 formed in the slider rear end 1a enters vertically from the slider 1 side surface 1b near the slider rear end on the core piece side, as shown by the broken line in FIG. Part of the slider 1 toward the slider rear end 1a at an angle of θ = 135 °, and at a position near the slider rear end surface 1a, the slider 1 comes out parallel to the slider rear end surface 1a to the side surface 1c opposite to the core piece side. There is. Therefore, near the side surface 1c on the opposite side of the core piece 5 of the slider 1, there is a groove 11 having a shallow bottom (depth d) with respect to the slider rear end surface 1a. In this embodiment, since the slider 1 is manufactured by injection molding as described above, the slider 1 can be formed into a much more free shape as compared with the conventional grinding process.
Therefore, the concave groove portion exposed on the slider piece side surface 1b on the core piece side (parallel to the slider rear end portion) and the inclined concave groove portion in the middle, and the shallow groove groove portion extending to the opposite side surface of the slider. The connecting portion between the inclined groove portion and the inclined groove portion can be easily rounded, and by smoothly connecting in an arc shape as shown in the figure, damage to the wire material during winding can be prevented.

As described above, by providing the concave groove 11 which is vertically inclined from the slider piece side surface 1b on the core piece side and is inclined toward the slider rear end portion 1a from the middle thereof, the conventional slider piece side surface 1b of FIG. 4 is inclined. Even if the groove depth D at the slider one side surface 1b is the same as that of the triangular groove 8 to be inserted, a large winding space can be secured near the core piece. Since the slider side portion 1c on the side opposite to the core piece 5 is a shallow groove groove, the groove depth D in the core piece portion is larger than that of the groove 9 penetrating in parallel at a constant depth in FIG. Even if it is the same, in the case of FIG. 1, since it has a shallow bottom except near the core piece, a sufficient wall thickness is ensured for the slider as a whole, which allows the flatness of the rail-like floating portions 2 and 3 at the time of post-processing. Is improved. Further, since the inclined surface 14 is formed in the middle of the concave groove 11, the winding work is facilitated by winding the core piece 5 by using the inclined surface 14. Since both sides of the inclined portion are smoothed by the R attachment as described above, dirt does not remain on this portion and cracks, cracks, cracks, etc. do not occur.

In the present invention, the angle θ of the inclined surface is 1 as shown in FIG.
The angle θ is not limited to 35 °, but 90 ° to 17 °
It can be arbitrarily selected within the range of 0 °. When θ <90 °, stains remain on the inclined surface and the corners on the core piece side, and defects are likely to occur. In addition, winding workability also deteriorates. θ> 17
At 0 °, the above-mentioned contamination does not occur, but the groove shape becomes close to the one side surface 1b of the slider, which is straight through to the opposite side surface 1c, and as shown in FIG. As a result of the extension, the wall thickness near the rear end of the slider becomes thin, and the flatness of the sliding surface decreases.

In the example of FIG. 1, the shallow groove groove 11 extends from the inclined groove portion of the groove bottom to the slider side surface 1c opposite to the core piece 5, but as shown in FIG. It is also possible to eliminate the concave groove portion and smoothly connect the inclined surface 13 of the concave groove 12 to the slider rear end surface 1a by rounding. Further, in each of the above-described embodiments, rounding is performed on both sides of the inclined surface of the groove bottom, but this rounding is for more reliable prevention of damage to the winding, occurrence of short circuit failure and prevention of dirt. However, such rounding may not be necessary depending on the angle of the inclined surface, and the present invention also includes a configuration in which the round bottom is not rounded.

The slider is not limited to being manufactured by injection molding, but may be formed by mechanical processing such as grinding as in the conventional case.

[0013]

As described above, according to the present invention, the winding groove formed at the rear end of the slider is formed perpendicularly to the slider side from the slider side on the core piece side to the vicinity of the core piece. Since the groove is slanted toward the rear end of the slider, the space for a large winding can be obtained only near the core piece, which improves workability in the winding process and reduces This prevents the occurrence of short circuit defects due to scratches. By smoothing the boundary between the concave groove portion parallel to the rear end of the slider and the inclined groove portion by rounding, dirt in the groove is not left. Even if the slider is miniaturized, it is possible to secure a sufficient thickness after the groove is formed, so that the flatness of the slider sliding surface can be improved, and
Holds the core piece because it is possible to secure strength that can withstand various processing such as suspension adhesion strength on the slider back surface (on the side opposite to the sliding surface) on the core piece side, and it is not necessary to unnecessarily deepen the groove to other parts. A magnetic head having stable strength and excellent characteristics can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a levitation type magnetic head according to an embodiment of the present invention viewed from a sliding surface side.

FIG. 2 is a side view of a side of the magnetic head shown in FIG. 1 near a core piece.

FIG. 3 is a plan view of another embodiment of the present invention.

FIG. 4 is a plan view seen from the sliding surface side of a conventional floating magnetic head.

5 is a side view of the magnetic head shown in FIG. 4 on the core piece side.

FIG. 6 is a plan view of a levitation type magnetic head showing a conventional example in which a winding groove is formed on both sides at the same depth with respect to a slider rear end.

[Explanation of reference numerals] 1 slider 1a slider rear end surface 1b slider piece side surface on core piece side 2,3 rail-like floating part 5 core piece 8,9,11,12 winding groove 13,14 inclined surface

Claims (3)

[Claims] 1. A flying type magnetic head in which a core piece is attached to the slider end portion on the one side from the center of the slider and on the downstream side in the magnetic medium traveling direction, and a winding groove is formed in the slider end portion. The winding groove extends vertically from the side surface of the slider on the core piece side and extends 90% from the middle portion thereof.
A flying type magnetic head, characterized in that it is bent toward the slider end portion at an angle of 170 ° to 170 °. 2. The slider on the side opposite to the core piece, wherein the winding groove is bent toward the slider end at the midway portion and has a slight groove depth with respect to the slider end. The flying magnetic head according to claim 1, wherein the flying magnetic head penetrates to a side surface. 3. The bent portion of the winding groove is curved and rounded.
The flying type magnetic head described in the item.