| 摘要 |
PURPOSE:To make it possible to enhance reliability to insulating property, by chamfering the corners of the iron core parts of the core of an electromagnetic solenoid radially provided corresponding to a large number of printing wires in matrix arrangement and the grooves of a wall panel of said core. CONSTITUTION:Chamfering 5d is applied to the corners of the iron core parts 5a of the core 5 corresponding to a large number of printing wires and the grooves 5c of the wall panel 5b to prevent such a phenomenon that an insulating coating is ruptured by the corners of the grooves 5c even if external lead wires 23 are contacted with the wall panel 5b when a printing head is scanned at a high speed and insulating property is lost. In addition, even when a coil 7 is mounted to the iron core parts 5a, the insulating coating is not ruptured by the corners of the iron core parts 5a and the printing head having high reliability can be obtained in good workability. |
