JPS5817519A - Magnetic head - Google Patents

Abstract

PURPOSE:To suppress output variation by sandwiching a flexible medium between the 1st slider provided with a main magnetic pole and the 2nd slider provided with an auxiliary magnetic pole. CONSTITUTION:A main magnetic pole 16 made of a thin magnetic film is fitted to a slider 17, and an auxiliary magnetic pole 18 made of ferrite is fitted to a slider 19, which is supported by a gimbals through a plate 20 made of stainless steel. The auxiliary magnetic pole 18, therefore, slants from the perpendicular direction of a medium 4 to an optional direction. Further, the slider 19 is pressed, as shown by an arrow 22, by a spring through the gimbals supporting plate 20 by a pivot pressing mechanism 21. Consequently, the slider 19 while pressing the medium 4 balances itself following a main magnetic pole side slider 17 by reaction force generated by the rigidity of the medium. The abutting surface of the main magnetic pole side slider for the medium 4 is curved in a convex shape in the running direction of the medium, and the surface of the auxiliary magnetic pole side slider 19 is curved in a concave shape; and magnetic ples 16 and 18 are arranged in the middle between both the curved surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a perpendicular magnetic
In the 0-layer magnetic head improvement method for the magnetic head, as a method of increasing the recording density, in place of the conventional horizontal recording layer, on at least one side of a flexible paste such as Co-0r or polyester sheet, Must be! After providing a base magnetic layer such as permalloy according to the requirements, a C, o-Cr layer with a thickness of about 1 μm is formed to form a round shape.

In this way, a continuous layer of metal is deposited on one or both sides of the flexible paste, increasing its rigidity, and it is now possible to use the conventional flat pad (slider) for horizontal recording to swipe the medium. Even if a magnetic head is constructed, the medium is not stretched flat by the slider, and the contact between the medium and the disk core is poor), resulting in extreme output fluctuations that are not practical. Conventionally proposed heads include a round one using a ring-shaped core as shown in FIG. 1(a), and one using a main magnetic pole and an auxiliary magnetic pole as shown in @11!1(b)K. gtsta) is a ring-shaped 7 with a winding of 11 m2 in the slider l.
An anaerobic head is constructed by providing an etwite core 3, which is designed so as to come into contact with the perpendicular recording layer 5 of the medium 4.The structure is similar to a conventional horizontal recording head.

In the main pole/auxiliary pole type head shown in FIG. 1(b), a slider 7 provided with a main pole 6 made of, for example, an N1-FeWI film is brought into contact with the perpendicular recording layer 5@, and the slider 7 and the medium 4 are An auxiliary magnetic pole 8 made of ferrite with a winding of 1lIIIz is placed at a position facing each other and a slider 9 is arranged so that the medium number is sandwiched between the two sliders 7 and 9. This latter magnetic head converges the signal magnetic field generated by the auxiliary magnetic pole 8 onto the ultra-thin magnetic field constituting the main magnetic pole 6, and performs O recording on the perpendicular recording layer 5 there. It is extremely superior in terms of density improvement. , fill! In 1t(b), the recording layer 5 is provided on only one side of the medium 4, but it is provided on both sides and arranged upside down! In that case, the magnetic head may be installed separately, and in that case, since the vertical flux density from the auxiliary magnetic pole is small in the ML sickle layer on the contact surface of the magnetic pole, there is almost no influence, and recording on both sides is "T".
It is known that this is possible.

Even with the above-mentioned main pole/auxiliary pole type magnetic head, when used for perpendicular recording flexible media such as 70p disks, tapes, or magnetic cards, there is a problem, especially when the main pole contacts the recording layer when the medium runs. be. The slider suppression force must not be so large as to obstruct the running of the media, and there are natural limitations as the abrasion resistance must also be taken into account. Perfectly flat with a special slider! It is difficult to realize that the medium travels by extending the length of time by 2K, and severe output fluctuations have been a major problem in the past.

Therefore, the present invention provides a structure in a magnetic head having a main pole/auxiliary pole configuration for perpendicular magnetic recording, which ensures reliable and smooth contact of the main pole with the O recording layer during medium travel, thereby suppressing output fluctuations. That's what I'm trying to do.

The magnetic head according to the present invention is characterized in that it is a magnetic head for a flexible magnetic recording medium in which a linear brass layer is provided on at least one side of a flexible base, and the main magnetic pole is set with a It has a configuration in which the flexible medium is sandwiched between a second slider having nine auxiliary magnetic poles and a winding for performing readout; The main magnetic pole is arranged approximately at the center of the scissor convex curved surface, and the medium contact and leakage of the second slider is a concave curved surface along the medium running direction, and the main magnetic pole is arranged approximately in the center of the scissor convex curved surface. The magnetic poles are arranged approximately in the center of the concave self-portrait, and are located at the 9th and 9th corners.

Hereinafter, this will be described in detail at 11 KmilN based on the embodiment.02- is the cross section of the magnetic head O1I of the embodiment of the present invention; 16 is a main magnetic pole composed of a magnetic recording film, 17 is an optical slider with the main magnetic pole 16 arranged approximately in the center, 18 is an auxiliary magnetic pole made of 7-elite, etc., and 19 is a slider for the auxiliary magnetic pole; Since the distribution medium 4 is a conventional one, the detailed structure and illustration thereof will be omitted. Each slider 17.1
9 is a highly rigid one made of Cerasec, and 20 is a slope made of stainless steel, for example, to gimbally support the auxiliary magnetic pole slider 19.
The structure is such that it can be adapted to any O7 meat from the direction of the medium 40Iil line. The 0 fin K is pressed down by a spring (not shown) in the direction of
Therefore, the slider 11 presses the medium 4 and is held together by the force generated by the rigidity of the single-ply fabric including the main magnetic pole side slider 17Kt. The eleventh feature of the present invention is that, as shown in the figure, the media 4 to O contact surface of the main pole side slider 17 is convex along the medium running direction (arrow 23) K, and the convex self is The rope pole 1 is disposed in the center of the pole, and the auxiliary magnetic pole side slider 11108 is also shaped like a concave O*m along the medium running direction, and the concave shape is approximately at the center. The auxiliary magnetic pole L and K are arranged on the 0 auxiliary piece and the auxiliary pole side is fixed 1 and 0.
It is desirable to smooth the 0 machine seconds. , the auxiliary magnetic pole side nut 19 may have a convex shape.
may have a concave shape along both of the above directions.
Because the side slider 1 is pressed against the main magnetic pole side slide 17 and slightly bounded, the medium travels with the brass layers on both sides always in close contact with the main magnetic pole 16, which eliminates the conventional problem. It is possible to suppress output fluctuations to a significantly smaller level! Wow. The pressing force required for this purpose is relatively small,
The appropriate pressing force is related to the ratio of each slider shaft and the rigidity of the medium, and the following are nine examples that were adopted in this embodiment and obtained good results. Each slider 17,190 convex and! 011 one rate and a half sn, 2 each (1m, slide end 1, O concave VS
The O length is 4mm, the slider 17 is applied a 5 oto suppressing force from the upper part of Fig. 2 in the direction of the S body, the arm is locked with the stopper to make it into a stationary state, and the slider 190 pressing force 23 is set to 20f. 〇 Under these conditions, a polyester base with a thickness of I Osm and a permalloy base with a thickness of 11 layers on both sides and a tV
By forming a sS haze-thickness 0 Co-Cr working recording layer and continuously writing to a nine-bit disk, it was confirmed that the output fluctuation was much smaller compared to the conventional method. lI was done.

[Brief explanation of the drawing]

1! iml is a diagram showing a conventional magnetic head for perpendicular magnetic recording, and FIG. 2 is a sectional view of a main part of a magnetic head according to an embodiment of the present invention. 4...Medium 16...Main magnet 1i 1g...Auxiliary magnet 1i H. 19...Slider

Claims (1)

[Claims] A magnetic head for a flexible magnetic recording medium in which a writing layer is provided on at least one side of a flexible pace, the head comprising a first slider provided with a main faIIIA and an auxiliary wire provided with a winding for ejecting a writing gun. The flexible medium is sandwiched between a magnetic pole and a second slider, and the medium contact am of the first slider has a convex curved surface along the medium running direction, and the main magnetic pole has a scissors convex shape. The medium contacting surface of the second slider is a concave curved surface along the medium traveling direction, and the auxiliary slider is disposed approximately at the center of the concave 1!1 surface. A magnetic head featuring: