JPS60201515A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain a stable signal by providing a block made of a nonmagnetic Ni-Zn material to the side of a recording/reproducing core and an erasure core so as to increase the contact area with a recording medium even if the recording/reproducing core and the erasure core are decreased. CONSTITUTION:A recording/reproducing gap 4 is constituted by combining the recording/reproducing cores 1a and 1b. Further, a couple of erasure gaps 5 are constituted by combining the erasure cores 2a and 2b. The recording/reproducing cores and the erasure cores are combined incorporatedly so as to clip an intermediate block 3 made of a nonmagnetic material in-between in order to eliminate mutually the crosstalk. On the other hand, in order to increase the contact area between the magnetic head and the recording medium, the blocks 6, 7 made of the nonmagnetic substance Ni-Zn are combined respectively to each side face of the recording/reproducing cores and the erasure cores.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to the structure of a magnetic head.

[Prior art]

A magnetic head of a magnetic recording device that forms a recording track along the circumferential direction of a disk-shaped recording medium such as a magnetic disk has a recording/reproducing core and an erasing core combined in a direction parallel to the running direction of the recording medium. The slider is made of a non-magnetic material such as barium titanate so that the recording medium and the magnetic head are in stable contact with each other in the direction perpendicular to the running direction.

In magnetic heads for high-density recording, as the recording track becomes smaller, the reproduction output voltage also decreases, so in order to increase the reproduction efficiency and increase the reproduction output voltage, the magnetic resistance of the recording and reproduction core is reduced. The cross-sectional area of parts other than the gear knob was increased and the length of the magnetic path was shortened. Increasing the magnetic path length means that the core becomes smaller, and in the case of the bed structure described above, the dimension in the running direction of the recording medium becomes smaller, making it possible to maintain contact between the magnetic head and the recording medium. There was a problem that a stable signal could not be obtained. Even if only the slider was made larger in the direction of travel of the recording medium, there was a problem that a groove would be formed between the recording/reproducing core or the erasing core and the slider, and the edges of the groove would damage the recording medium. .

〔the purpose〕

The present invention is intended to solve these problems, and its purpose is to enable stable contact with the recording medium and obtain stable signals even when the recording/reproducing core and erasing core are made smaller. Another object of the present invention is to provide a highly reliable head structure that does not damage the recording wire.

〔overview〕

The magnetic head of the present invention provides (1) a magnetic head having a structure in which a recording/reproducing core and an erasing core are integrated in a direction along the running direction of a recording medium, at least on the recording/reproducing core side or on the erasing core side. Non-magnetic N in the direction along the running direction of the recording medium on the side
(2) A block made of a non-magnetic Hi-zn material is provided, and the recording/reproducing core, the erasing core and the magnetic Hi-zrL block are combined. Blocks made of Zn materials,
It is characterized by having a recording/reproducing core and an erasing core on both sides.

〔Example〕

The present invention will be described in detail below based on examples.

FIG. 1 is a plan view showing this embodiment, and FIG. 2 is a perspective view of the core of this embodiment.

In FIG. 1, 1 is a recording/reproducing core, 2 is an erasing core, 8 is an intermediate block separating the recording/reproducing core 1 and the erasing core 2, 4 is a recording/reproducing gap, 5 is an erasing gap, and 6 is a non-magnetic N provided on the side of the recording/reproducing core 1.
iz is a block made of material; 7 is a block made of non-magnetic Nz-zn material provided on the side of the erasing core 2; 8 is a slider.

FIG. 2 is a perspective view of the core, in which the recording/reproducing cores 1a and 1b are combined to form a recording/reproducing gap 4. In addition, erasing cores 2α and 2b are combined to form one
A pair of erasing gaps 5 are configured. The recording/reproducing core and the erasing core are combined into one body with an intermediate block 3 made of a non-magnetic material sandwiched between them so as to eliminate mutual crosstalk. On the other hand, in order to increase the contact area between the magnetic head and the recording medium, blocks 6 and 7 made of non-magnetic N6-z material are combined on the side surfaces of the recording/reproducing core side and the erasing core side, respectively. bru.

Next, an example of a method for manufacturing the magnetic head will be described with reference to FIGS. 8 to 7.

First, as shown in FIG. 8, recording and reproducing cores 1α and 1b are
Prepare and polish the joint surfaces IO and 11 of each, and make the winding groove 1.
2, a groove 13 for regulating the gear width for recording and reproduction is formed.
and 14. Next, as shown in FIG. 4, erasing cores 2α and 2b are prepared, and their joint surfaces 15 and 16 are polished to form winding grooves 17 and erasing gear width regulating grooves 18 and 19, respectively.

The recording/reproducing cores 1α and 1b and the erasing cores 2a and 2
b are joined by glass fusion.

Next, as shown in FIG.
Blocks 6 and 7 made of materials are prepared, and the recording/reproducing core 1, the erasing core 2, the intermediate block 8, and the blocks 6 and 7 made of non-magnetic Nz-Z7z material are combined and joined. In this case, joining by glass fusion is preferable from the viewpoint of durability and workability, but adhesives can also be used. After joining, as shown in Figure 6 (OL), 20
．． By cutting along the line -21, a core is obtained as shown in FIG. 6(b).

Sliders 8cL and 8 are attached to the above core as shown in Figure 7.
A magnetic head is obtained by preparing a magnetic head and bonding it to a core.

In this embodiment, pressure blocks are provided on both sides of the recording/reproducing core side and the erasing core side, but sufficient effects can be obtained even if the pressure blocks are provided on only one side. Further, similar effects can be obtained with cores other than the recording/reproducing core and the core having a groove for regulating the erasing gap.

〔effect〕

As described above, according to the present invention, the recording/reproducing core and the erasing core can be made smaller by providing blocks made of non-magnetic Ni-Z% material on the sides of the recording/reproducing core and the erasing core. Even when the magnetic head is in contact with the recording medium, it is possible to obtain a large contact area with the recording medium.9, the contact between the magnetic head and the recording medium is stable, and a stable signal can be obtained. In addition, the magnetic head does not have edges and can be used for a long time without damaging the recording medium, and the area in contact with the recording medium is increased. It is possible to freely form the shape of the contact with the recording medium.

In addition, since the head core was constructed from a block made of non-magnetic Nz-zn material, the material properties are similar to those of the recording/reproducing core and erasing core, so there is no grinding or chipping of the grinding wheel during cutting. Manufacturing becomes easier.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a perspective view of the Hirokoa, and Figs. 8 to 6 (lL) (b) to 7 are perspective views showing the manufacturing method. . 1. Core for fist recording/reproduction 2 Core for fist/erasing 8... Intermediate block 4-... Recording/reproducing gap 5... Gap for threat erasing 6... Block 7... Block 8/Φ/Slider lO...Joint surface 11...Joint surface ■2...Winding groove 13...Gear lub width regulation groove 14--Gear lub width regulation groove 15...Joint surface 16*e Joint surface 17...Fist winding groove 18...-Gear lug width regulating groove 19...-Gear lug width regulating groove...e Cutting line 21... Cutting line Fig. 1 Fig. 3 Fig. 4 Fig. 5

Claims (2)

[Claims] (1) In a magnetic head having a structure in which a recording/reproducing core and an erasing core are integrated in a direction opposite to the running direction KG of the recording medium, at least the recording medium on the recording/reproducing core side or the erasing core side Non-magnetic Ni-Z in the direction of travel? ! 1. A magnetic head, comprising a block made of a material such that the recording/reproducing core, the erasing core, and the nonmagnetic Ni--Znn diblock are combined. (2) A magnetic head according to claim 1, wherein blocks made of non-magnetic Ni-z material are provided on both sides of the recording/reproducing core and the erasing core.