JPS62281109A - Vertical magnetic head - Google Patents

Abstract

PURPOSE:To improve reproduction efficiency, by using a core on one side of a ring-shaped head as the return path of a magnetic flux at a recording time, and using the ring head as a reproducing head at a reproduction time. CONSTITUTION:A main magnetic pole exciting head writes a signal at a part on which DC erasure has been performed. It is necessary to attracted the magnetic flux generating from the main magnetic pole exciting head by a certain part, and the attracting function of the magnetic flux is performed by the core on one side forming a ring head 102, therefore, it is possible to maintain an appropriate recording efficiency. The reproduction of the signal is performed by the ring head setting 102 and 103 as magnetic cores. When the reproduction efficiency between the ring head, and the main magnetic pole exciting head are compared, the ring head has the reproduction efficiency considerably better than that of the latter, therefore, it is preferable to perform the reproduction by the ring head such as the vertical magnetic head in the said invention at the reproduction time, judging from a reproduction efficiency point.

Description

[Detailed Description of the Invention] Detailed Description of the Invention [Industrial Field of Application] Used in a vertical recording system and equipped with a DC erase head that performs DC erase before inputting a signal. This invention relates to a vertical excitation type head.

[Conventional O technology]

Conventionally, various types of 0° magnetic heads have been considered. Applied Quick Seminar Dake Direct Magnetic Recording Method Text (Published by Japanese Society of Applied Magnetics, December 12, 2019) P
, 77 show various types of magnetic heads. However, with either head, it is possible to erase at the same time as recording.1. A. For reference, 2 O-row FT heads are shown in Figure 2. (a) is an auxiliary excitation type head developed by Mr. Iwasaki et al. 1).

(b) is the main magnetic box excitation head developed by Hangumi et al. 2) The v-hft"L" head also performs read/write operations by itself.

[The problem that the invention is trying to solve]

A conventional Q perpendicular magnetic head has two dots.

■Recording section QDC erase cannot be performed, or even if it can be done, it is very difficult. Therefore, if you overwrite the recording medium, if you do even a slight offset, the previous V) signal will be erased.
It remains without disappearing and lowers 08/N f during playback.

■ Conventional 0 magnetic heads can be used for both reading and writing purposes.

In general, auxiliary quick excitation, main field excitation, etc.■ Vertical magnetic heads have very poor reproduction sensitivity, so external noise, reproduction amplifier noise, etc. will lower the S, and the quality will be sufficient ■ To reproduce a good signal ■ is difficult.

The present invention is intended to solve the problem of vertical 6-air heads, and its purpose is (1) to erase 1ADc: wider than the recording signal width on the recording surface.

) When regenerating, use a regeneration method with good regeneration efficiency.

There is K.

[Means to solve the problem]

When writing the perpendicular magnetic head of the present invention, a ring-shaped head with zero core is used as a magnetic flux DIJ turn path, and during reproduction, the Q-ring head is used as a reproduction head.

[Tora Seda]]

The vertical aeration head of the present invention will be explained with reference to the drawings.

Figure 1 (α) is an external view. 101 is a main 511 heron core for signal recording. As shown in FIG. 1(C), a coil 106 is wrapped around the coil 5. This is the coil.

An O coil is used to conduct recording and generate a recording magnetic field.

102.103020 Magnetic 23 both form a ring head. 104i! It is a 0 coil.

During recording, the ring head operates as a DC erase head by passing DC current through the coil.

Rikegu head 0 gap (Kurei 1 figure (6) 105)
Since it is made wider than the h main bottle core width 101, the previous signal can be erased even if it is slightly off-track.

The magnetic flux generated from the main field excitation head, where the main field excitation head writes signals after DC erasure has finished, must be sucked in somewhere.

(Otherwise, the magnetic resistance will become very high, making it difficult to generate a flux per day, and recording efficiency will decrease.) This role is performed by the one-sided O core that forms the 102 ring head. Able to maintain appropriate recording efficiency.

Signal Reproduction is performed by a ring head with a magnetic core of 102 and 103.Comparing the regeneration efficiency of the ring head and the main excitation head, it is found that the ring head has a considerably higher IA and absorbs the leakage magnetic flux from the recording medium. In the case of a ring head, the magnetic flux loop passing through the corer has a lower magnetic resistance than the loose one, and most of the magnetic flux can pass through the core. Furthermore, the main field excitation head is inefficient because the magnetic resistance of the loop passing through the main pole cannot be lowered as much as compared to other loops.

Therefore, using a ring head for reproduction as in the perpendicular magnetic head according to the present invention is extremely unfair considering the zero reproduction efficiency.

S consideration 1) S, wasaki, eta1.1B [E Tra
ns, Magn, Nag-135, 1272 (1977
) 2) Hanshuu et al.: S, 58 IEICE Sozen 195 (1983)
[Effects of the invention] The perpendicular magnetic head of the present invention has the following features: (1) Even when overlapping during off-track, the S/
N! 7) A good signal can be read.

(2) When reproducing, a ring head is used. (2) Reproduction efficiency is good.

It has the effect of

[Brief explanation of drawings]

Figure 1 (tL) is an external view of the perpendicular magnetic head of the present invention. Figure 1 (5) is a diagram viewed from the side in contact with the recording medium. Figure 1 (c) is the main rotary excitation head. Figure 2 (c) (b) u Conventional 0 perpendicular magnetic head. Applicant: Seiko Epson Shikikai Appearance Figure 1 (a) Figure 1 (b) Figure 1 (c) Figure 2 (a) Figure 2 (b)

Claims (1)

[Claims] A main pole-excited perpendicular magnetic head 101 used in a perpendicular magnetic recording type magnetic recording device and equipped with a DC erase head that performs DC erasing before writing a signal. A perpendicular magnetic head characterized in that one core 102 of a ring-shaped head is used as a return path, and during reproduction, the ring heads 101 and 103 are used as a reproduction head.