JPS60201513A - Magnetic head - Google Patents

Abstract

PURPOSE:To make the contact between a magnetic head and a recording medium stable by providing a collar at one side or both sides 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 worn. CONSTITUTION:Erasure gap width is regulated by slots 8a, 8b and 8c in a couple of erasure gaps comprising erasure cores 2a, 2b. The recording/reproducing core 1a and the erasure core 1b are provided respectively with a collar in a direction along the recording medium running. The collar of the recording/reproducing core and the collar of the erasure core are directed in opposite side respectively in the recording medium running direction. Thus, even if the recording/ reproducing core and the erasure core are worn, a stable contact with the recording medium is attained and a stable signal is obtained and also a head structure with high reliability is formed without giving a flaw to a recording medium.

Description

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

[Prior art]

A magnetic helide of a magnetic recording device, which forms a recording track along the circumferential direction of a disc-shaped recording medium such as a magnetic disk, has a recording/reproducing core and an erasing core running along the running direction of the recording medium. The sliders are made of a non-magnetic material such as barium titanate so that the recording medium and the magnetic head can stably come into contact with each other in the direction of angle KW in the running direction.

High-density [f recording magnetic helide has a small recording track and J radiusζ
As the reproduction output voltage becomes lower,
In order to reduce the magnetic resistance of the recording/reproducing core in order to increase the reproduction efficiency and increase the reproduction output voltage, the cross-sectional area of parts other than the gear part was increased and the length of the magnetic path was shortened. Shortening the magnetic path length means that the core becomes smaller, and in the case of the above-mentioned head-I structure, the size of the recording fragment in the running direction becomes small ζ, and the magnetic helide There was a problem when the contact between the recording medium became unstable and a stable signal could not be obtained.In addition, even if you simply increase the slider in the recording medium running direction, the recording/reproducing core or the erasing core and the slider There is a problem in that a groove is formed between the recording medium and the recording medium is damaged by the edge of the groove.

〔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 if the recording/reproducing core or erasing core becomes smaller. The object of the present invention is to provide a highly reliable groove structure without damaging the recording medium.

〔overview〕

The magnetic head of the present invention is 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. It is characterized in that flanges are provided on both sides of the core 1, 11, or each of the recording/reproducing core and the erasing core in a direction along the recording medium running direction.

〔Example〕

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

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

In FIG. 1, it is composed of a 1-digit recording/reproducing core, a 2-digit erasing core, an intermediate block 31- that separates the recording/reproducing core from the erasing core, and 4-digit recording/reproducing cores 1α and 1b. This is a gear knob for recording and reproduction, and the width of the gear knob for recording and reproduction is regulated by grooves 6α and 6b.

A pair of erasing gaps formed by 5-digit erasing cores 2a and 2b, and erasing gear widths uBa and Bb.
and 8C are regulated by grooves. The recording/reproducing core 1α and the erasing core 1bK are configured such that flanges are respectively provided in the direction along the recording medium traveling direction. The collar of the recording/reproducing core and the collar of the erasing core are configured to face opposite sides with respect to the recording medium running direction.

Collar length of the recording/reproducing core l + - collar length of the erasing core t2
During the machining of the core, or as shown in Figure 2, the slider,
After combining 8cL and 8b, there were problems during grinding and polishing of the contact surface of the recording W body (breakage).

It is preferable to make the inductance as small as possible within a range where chips (chips, etc.) do not occur because the inductance becomes smaller and the resonant frequency becomes higher, making it possible to use up to high frequencies.

Next, an example of a method for manufacturing the magnetic head will be described with reference to FIGS. 3 to 7.

First, as shown in FIG. 6, recording and reproducing cores 1α and 1b are
Prepare and polish the joint surfaces 10 and 11 of each to form the winding groove 1.
After forming the recording and reproducing gear 9 width regulating grooves 13 and 14, the recording and reproducing cores 1α and 1b are joined by glass fusion.

In the same manner as shown in FIG. 4, after polishing the joint surfaces 15 and 16 of the erasing gears γ2α and 2b to form the winding groove 17 and the erasing gear width regulating grooves 18 and 19, the glass Join by fusion.

Next, as shown in Fig. 5, the recording/reproducing core and the erasing core made by the above method, and an intermediate block separating the recording/reproducing core and the erasing core are prepared, as shown in Fig. 6 (n). Combine and join. Then, if you cut from the lines 20.21 and 22.25.24.25 shown by the two-dot chain line, you can see Figure 6 (
The required core is obtained as shown in b).

Sliders 8α and 8b are attached to the core as shown in FIG.
A magnetic head can be obtained by preparing and joining it with the core.

In this embodiment, flanges are provided on both sides of the recording/reproducing core and the erasing core, but the same sufficient effect can be obtained even if the flanges are provided on only one side.

〔effect〕

As described above, according to the present invention, by providing all 14 cores on one or both sides of the recording/reproducing core and the erasing core, even if the recording/reproducing core and the erasing core become small, the contact with the recording medium is maintained. By making the contact between the magnetic head and the recording medium stable, stable signals can be obtained, and because the distance in the recording medium running direction becomes larger, the surface in contact with the recording medium can be made larger. The degree of freedom in shape increases.

In addition, since the flange part is not constructed by pasting blocks together, but is integrated, the number of joint surfaces that come into contact with the recording medium is reduced, so there is no chance of scratching the recording medium. In addition, since there are fewer joint surfaces, there are fewer steps between the parts that occur from the joint surfaces, resulting in long-term reliability.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a core showing one embodiment of the present invention, Fig. 2 is a plan view of a magnetic head, Figs. 3 to 6) (b), and Fig. 7 is a perspective view showing one manufacturing method. It is a diagram. 1...Recording/reproducing core 2...Erasing core 3...Intermediate block 4...Recording/reproducing gap 5...Erasing gap 6...Gear tooth width regulation groove for recording and playback 7...
... Erasing gear lug width regulation groove 8 ... Slider 10.11 ... Joint surface 12 ... Winding groove 13.14 ... Gear lug width Regulatory groove 15.16
......Joint surface 17.18...Gear lug width regulation groove 20.21
, 22.25... Above the cutting line Applicant Suwa Seikosha Co., Ltd. Figure 4 Figure 5

Claims (1)

[Claims] In a magnetic field having a structure in which a recording/reproducing core and an erasing core are integrated in the direction along the running direction of the recording medium, at least the recording/reproducing core side or the erasing core side, or the recording/reproducing core side. A magnetic read/write device characterized in that a collar is provided on both sides of each erasing core in a direction along the running direction of a recording medium.