JPH0435213U

JPH0435213U -

Info

Publication number: JPH0435213U
Application number: JP7675590U
Authority: JP
Priority date: 1990-07-19
Filing date: 1990-07-19
Publication date: 1992-03-24

Description

[Brief explanation of drawings]

第１図はこの考案の実施例である磁気デイスク
装置におけるリード／ライトヘツド及びイレーズ
ヘツドからなる磁気ヘツドの磁気回路を示す模式
図、第２図は第１図の磁気ヘツドの磁気回路に流
れるライト電流の波形を示す説明図、第３図は従
来の磁気デイスク装置におけるリード／ライトヘ
ツド及びイレーズヘツドからなる磁気ヘツドの磁
気回路を示す模式図、第４図は第３図の磁気ヘツ
ドの磁気回路に流れるライト電流の波形を示す説
明図である。図において、１……リード／ライト（読出し／
書込み）ギヤツプ、２……イレーズ（消去ギヤツ
プ）、３……リード／ライトコイル、４……イレ
ーズコイル、５……正方向ライト電流ＩＷＡ、６
……負方向ライト電流ＩＷＢ、７……イレーズ電
流ＩＥ、８……センタコア、９……リード／ライ
トコア、１０……イレーズコア、１１……正方向
ライト電流Ｉ′ＷＡである。なお、図中、同一符
号は同一、又は相当部分を示す。 FIG. 1 is a schematic diagram showing the magnetic circuit of a magnetic head consisting of a read/write head and an erase head in a magnetic disk device which is an embodiment of this invention, and FIG. 2 shows a write current flowing through the magnetic circuit of the magnetic head shown in FIG. An explanatory diagram showing waveforms, FIG. 3 is a schematic diagram showing a magnetic circuit of a magnetic head consisting of a read/write head and an erase head in a conventional magnetic disk device, and FIG. 4 shows a write current flowing in the magnetic circuit of the magnetic head shown in FIG. It is an explanatory diagram showing a waveform of. In the figure, 1...read/write (read/write)
write) gap, 2... erase (erase gap), 3... read/write coil, 4... erase coil, 5... forward write current IWA, 6
... Negative direction write current IWB, 7 ... Erase current IE, 8 ... Center core, 9 ... Read/write core, 10 ... Erase core, 11 ... Positive direction write current I'WA. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

In a magnetic disk device equipped with a magnetic head consisting of a read/write head and an erase head that share a center core, in order to cancel the leakage magnetic flux from the erase coil of the erase head,
When writing, the above read/write head read/
A magnetic disk device comprising a read/write head configured such that a write current flowing through a write core is set to be unbalanced in a positive direction/negative direction.