JPS6440536U

JPS6440536U -

Info

Publication number: JPS6440536U
Application number: JP13323287U
Authority: JP
Priority date: 1987-09-02
Filing date: 1987-09-02
Publication date: 1989-03-10

Description

[Brief explanation of the drawing]

第１図は、本考案に係るワイヤ印字ヘツドの構
成を示す一部省略側断面図、第２図は、第１図に
おけるＡ―Ａ線矢視平断面図、第３図は、電磁石
と電歪素子の駆動及び印字ワイヤの動作を説明す
る為の波形図、第４図は、コアでの板ばね保持力
の低下を説明する図、第５図は、本考案に係るワ
イヤ印字ヘツドの他の実施例を示す要部側断面図
、第６図は、従来のワイヤ印字ヘツドの構成を示
す一部省略側断面図、第７図は、従来のワイヤ印
字ヘツドにおける電磁石の駆動及び印字ワイヤの
動作を説明する為の波形図である。２……永久磁石、４……スペーサ、４ａ……板
ばね当接面、５……ヨーク、６……板ばね、６ａ
……可撓部、６ｂ……スペーサ当接面、９……ア
ーマチユア、１０……印字ワイヤ、１２……電磁
石、１３……コア、１４……凹部、１５……電歪
素子。 FIG. 1 is a partially omitted side cross-sectional view showing the configuration of the wire printing head according to the present invention, FIG. 2 is a plan cross-sectional view taken along the line A--A in FIG. FIG. 4 is a waveform diagram for explaining the drive of the strain element and the operation of the printing wire. FIG. 4 is a diagram for explaining the decrease in the holding force of the leaf spring in the core. FIG. 6 is a partially omitted side sectional view showing the configuration of a conventional wire print head, and FIG. 7 is a side sectional view showing the structure of a conventional wire print head. FIG. 4 is a waveform diagram for explaining the operation. 2... Permanent magnet, 4... Spacer, 4a... Leaf spring contact surface, 5... Yoke, 6... Leaf spring, 6a
. . . Flexible portion, 6b . . . Spacer contact surface, 9 . . . Armature, 10 .

Claims

[Claims for Utility Model Registration] An armature is attached to a flexible portion of a leaf spring whose one end is held between a spacer and a yoke, and a printing wire is attached to the tip of the armature, and the armature is connected to the leaf spring by the magnetic flux of a permanent magnet. The flexible portion of the leaf spring is attracted to the core of the electromagnet against the elasticity of the leaf spring, and by exciting the electromagnet with an electromagnet drive signal, the attractive force of the permanent magnet is reduced, and the leaf spring is attracted to the core of the electromagnet. In a wire printing head that prints by releasing the flexible part from the core and driving the printing wire at the tip of the armature by the elasticity of the leaf spring, the spacer contact surface of the leaf spring or the leaf spring contact surface of the spacer A recess is formed in the contact surface or both of the spacer contact surface and the leaf spring contact surface, and an electrostrictive element or a magnetostrictive element is interposed between the leaf spring and the yoke, and the electrostrictive element or magnetostrictive element is interposed between the leaf spring and the yoke. A wire printing head characterized in that, by driving an element in synchronization with the electromagnetic drive signal, a force is applied to the leaf spring so that a flexible portion of the leaf spring tends to separate from the core.