JPH01241014A - Bulk type magnetic head - Google Patents

Abstract

PURPOSE:To easily assemble the title magnetic head by joining the core of the magnetic head to the slit of a slider formed integrally after the core is fitted in the slit. CONSTITUTION:The slider 10 is formed in such a way that after a blank slider body provided with a vertical groove 11 having ribs 5a and 6a on the back side of a floating surface 8 is formed integrally, a slit 12 having a width corresponding to the thickness of a magnetic core 7 is provided on the vertical groove 11 along the longitudinal direction of the groove 11. Then a non-cut section 14 having a length corresponding to that of the cut section 9 of the magnetic head core 7 is left at the end section of the slit 12. Thereafter, the magnetic head core 7 is fitted in the slit 12 of the slider 10 so that cut section 9 of the core 7 is abutted with the non-cut section 14, and the core 7 is joined to the slider 10 with glass or a resin. Thus the magnetic head is easily assembled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bulk type magnetic head in which cores made of magnetic seven-piece light members are connected in series through non-magnetic members.

[Conventional technology]

With the rapid spread of OA display devices in recent years, the demand for floppy disk devices, for example, has expanded dramatically.The magnetic heads used in these types of devices include a recording/reproducing magnetic head core and an erasing magnetic head core. Bulk type magnetic heads, in which magnetic heads are connected in series, have become particularly popular.

This bulk type magnetic head has a structure as shown in FIG. 6.7.

That is, FIG. 6 is a perspective view before the slider is joined, and FIG. 7 is a perspective view of the completed product after the slider is joined and the assembly is completed, with the air bearing surface facing upward.

In FIG. 6.7, reference numeral 1 denotes a magnetic ferrite core for recording and reproduction in which a pair of magnetic ferrite cores 1a (I core) and 1b (C core) are bonded and reinforced with glass 4. 2 is a pair of magnetic ferrite cores 2a (I core)
and 2b (C core) are bonded and reinforced with glass 4 to form an erasing magnetic head core.

The magnetic core 1 for recording and reproducing and the magnetic core 2 for erasing have a thin plate of non-magnetic material such as barium titanate, calcium titanate, or glass (T core) between the respective cores la and 2a. ) 3 are interposed and joined together in series with γ lath or resin, and furthermore, a left slider 5 and a right slider 6 made of a non-magnetic material such as barium titanate or calcium titanate are joined on the left and right, as shown in FIG. A baffle-type magnetic head like this is formed.

[Problem to be Solved by the Invention] However, the left and right slider 5.6 has a lip 5a (6a) attached to the T core 3 for reinforcement and to ensure stability during assembly.
(The lip 6a of the right slider 6 does not appear in the MS6 diagram).

Therefore, when manufacturing the left and right sliders 5.6, the inner surfaces 5b and 6b cannot be formed by cutting, and must be formed by press forming.

Since the left and right sliders 5.6 are not the same shape, this press forming must be performed twice using two press molds, which requires a large number of man-hours and extra equipment, which impedes work efficiency. At the same time, this is a factor that increases the cost of products.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a bulk type magnetic head at low cost.

[Means to solve the problem]

In order to achieve the above object, the magnetic head of the present invention connects a recording/reproducing magnetic head core made of a pair of magnetic ferrite cores and an erasing magnetic head core made of a pair of magnetic ferrite cores via a non-magnetic material. A magnetic core is connected in series and integrated, and has a notch at the outer end of the air bearing surface of the erasing magnetic core, and a lip is provided in a longitudinal groove provided on the back side of the air bearing surface, and a lip is provided in a protruding manner. The residual material is placed in the slit of a slider made of a non-magnetic material, in which a slit is provided in the wall between the air bearing surface and the vertical groove, leaving a residual thickness corresponding to the length of the notch. It is characterized in that the notch portion is brought into contact with the flesh portion and fitted, and the magnetic core and the slider are joined by glass or resin.

When it is not possible to increase the depth of the cut portion of the magnetic hesitocore, the slider is assembled by providing a shallow groove having the same width as the slit in the remaining thickness of the slider.

[For production]

When making a magnetic head using this slider, assembly is easy because the magnetic head 7 is fitted and joined to the slit of the integrated slider via the remaining thickness.

Further, since the slider is integrally press-molded and then provided with slits by machining, only one mold is required for press-molding, and press-molding only needs to be performed once.

Therefore, even if the number of man-hours required for machining the slits is subtracted, the number of man-hours can be significantly reduced.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a perspective view showing the Pakuru magnetic head of the present invention with the air bearing surface facing down, FIG. 2 is a plan view of the slider with the air bearing surface facing down, FIG. 3 is a perspective view of the slider, and FIG. 5 is a front view of the magnetic head controller 7, and FIG. 5 is a cross-sectional view of the magnetic head shown in FIG. MS1 taken along the line AA in FIG.

In Figure PJ4, 7 is a pair of magnetic ferrite cores l.
A recording/reproducing magnetic head core 1 in which a' (I core) and 1b (c core) are bonded and reinforced with glass 4, and a pair of magnetic ferrite cores 2a (I core) and 2
b (C core) is bonded and reinforced with glass 4 to erase magnetic head core 2, and a thin plate of non-magnetic material such as barium titanate or calcium titanate (T core).
This is a Pakuru type magnetic head core which is integrally joined in series with glass or resin via 3.

In this magnetic head core 7, a slider 10 (described later) is attached to the outer end of the air bearing surface 8 of the erasing magnetic head core 2.
A notch 9 is provided with a depth corresponding to the thickness of the wall 13.

The slider 10 is made by injecting powder of a non-magnetic material such as barium titanate or calcium titanate into a mold and pressurizing it with a press. After integrally molding the raw material, the thickness of the magnetic head 77 is set in the longitudinal direction of the longitudinal groove 11 of the rough material (the figure is exaggerated, but the actual thickness is around 0.3 srs). ) A slit 12 having a width corresponding to the width is provided by machining, for example, using a disc grinder or the like. At the end thereof, a remaining thickness portion 14 having a length corresponding to the length of the notch 9 of the magnetic head core 7 is left, resulting in a structure as shown in FIG. 2.3.

Thus, the magnetic head core 7 is cut into the notch 9.
The magnetic head core 7 and the slider 10 are fitted into the slit 12 of the slider 10 so that the remaining flesh part 14 of the slider is in contact with the magnetic head core 7 and the slider 10, and the magnetic head core 7 and the slider 10 are bonded with glass or resin to form a baffle type magnet as shown in FIG. It makes up the head.

When the thickness of the slider wall 13 increases, the depth of the notch 9 of the magnetic head core 7 must be increased.
The notch 9 cannot be made very deep because the magnetic flux passing therethrough becomes insufficient and erasing becomes insufficient, and the strength of the magnetic head core decreases.

In such a case, a shallow groove (a second
By providing a notch 9a shown by diagonal double-dashed lines in the figure and a notch 9a shallower by a dimension corresponding to the depth of this shallow groove 15 as shown in FIG. 5, the passing magnetic flux can be reduced. Strength reduction can be prevented.

The shallow grooves 15 may be formed in advance using a press mold when the slider rough material is press-formed, or may be provided by separate machining.

〔Effect of the invention〕

By configuring the present invention as described above, the present invention achieves the effects described below.

Since the bulk type magnetic head of the present invention is made by fitting and joining a Pakuru type magnetic head core into the slit of an integrally molded slider, it is easy to assemble and efficiently manufactured with high dimensional accuracy. can do.

Since the slider is integrally molded and then machined to provide a slit into which the magnetic head core is fitted, only one mold is required for press molding, and the press molding operation only needs to be performed once.

Therefore, even if the machining of the slits is subtracted, the work efficiency for slider manufacturing can be greatly improved compared to the conventional method, and since only one press mold is required, equipment costs (mold costs) can be reduced. be able to.

As described above, a baffle type magnetic head can be provided at low cost.

By providing a shallow groove in the remaining thickness of the extension of the slider slit, the depth of the notch in the magnetic head core can be made shallow, thereby preventing a decrease in magnetic flux and preventing insufficient erasing. It ends with prevention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the baffle-type magnetic head of the present invention with the air bearing surface facing down, FIG. 2 is a plan view of the slider with the air bearing surface facing down, FIG. 3 is a perspective view of the slider, and FIG. The figure is a front view of the magnetic head core, Figure 5 is a cross-sectional view of the magnetic head in Figure 1 taken along line A-A in Figure 2, and Figure 6 is a diagram of the conventional baffle-type magnetic head before assembly. The perspective view, FIG. 7, is also a perspective view after assembly. Agent Patent Attorney Takashi Honma / Zu

Claims (2)

[Claims] (1) A recording/reproducing magnetic head core consisting of a pair of magnetic ferrite cores and an erasing magnetic head core consisting of a pair of magnetic ferrite cores are joined in series through a non-magnetic material and integrated, and the erasing magnetic head core is integrated. A magnetic head core is provided with a notch at the outer end of the air bearing surface, and a rib is provided protruding in a vertical groove provided on the back side of the air bearing surface, and the notch is provided in the wall between the air bearing surface and the vertical groove. A slider made of a non-magnetic material is provided with a slit with a length of remaining flesh corresponding to the length of the slider. A bulk type magnetic head characterized by a head core and a slider bonded together using glass or resin. (2) A shallow groove having the same width as the slit is provided in the remaining thickness of the slider, and a cut portion having a depth corresponding to the thickness of the wall of the shallow groove portion is provided in the air bearing surface of the magnetic head core. The bulk type magnetic head described.