<p>A permanent magnet (4) suitable for use in a wire print head is formed of plural split segments. Each split segment is formed by controlling the direction of a magnetic field, which is induced to have magnetic domains aligned in a direction of easy magnetization, and a punching direction at a right angle relative to each other. The split segments are combined together into an annular configuration. The permanent magnet (4) so formed is attached to a base (3), followed by the assembly of a base plate (5) and cores (12) to form a magnet assembly. The base plate (5) and the cores (12) are then surface-finished in flush relative to each other. <IMAGE></p>
申请公布号
EP0476559(B1)
申请公布日期
1995.01.11
申请号
EP19910115670
申请日期
1991.09.16
申请人
OKI ELECTRIC INDUSTRY COMPANY, LIMITED
发明人
ANDOU, HIROKAZU, C/O OKI ELECTRIC IND. CO., LTD.;KISHIMOTO, MITSURU, C/O OKI ELECTRIC IND. CO., LTD;TATSUKAMI, MASAHIRO, C/O OKI ELECTRIC IND. CO. LTD