JPH0379942U

JPH0379942U -

Info

Publication number: JPH0379942U
Application number: JP14033889U
Authority: JP
Priority date: 1989-12-05
Filing date: 1989-12-05
Publication date: 1991-08-15

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示すインパクト印字
ヘツドの要部断面図、第２図は積層型圧電素子が
ばね押し上げることにより、ばね力Ｆがどのよう
に変化するかを示す原理図、第３図はアーマチユ
ア変位量とばね力の関係図、第４図は吸引力を近
似するモデル図、第５図はコイル通電電流と吸引
力の関係図、第６図は従来のインパクト印字ヘツ
ドの要部断面図である。１……ベース、２……永久磁石、３……台板、
４……スペーサ、５……ヨーク、６……板ばね、
９……アーマチユア、１０……印字ワイヤ、１１
……コア、１２……コイル、１３……接続基板、
２１……積層型圧電素子。 Fig. 1 is a sectional view of the main parts of an impact printing head showing an embodiment of the present invention, Fig. 2 is a principle diagram showing how the spring force F changes when the stacked piezoelectric element pushes up the spring, and Fig. Figure 3 is a diagram of the relationship between armature displacement and spring force, Figure 4 is a model diagram that approximates attraction force, Figure 5 is a diagram of the relationship between coil current and attraction force, and Figure 6 is a diagram of the main points of a conventional impact printing head. FIG. 1... Base, 2... Permanent magnet, 3... Base plate,
4... Spacer, 5... Yoke, 6... Leaf spring,
9... Armature, 10... Printing wire, 11
... Core, 12 ... Coil, 13 ... Connection board,
21...Laminated piezoelectric element.

Claims

[Scope of claim for utility model registration] An armature with a printing wire fixed to the tip,
a core provided opposite to the armature; a bias spring supporting the armature;
In a wire dot print head consisting of a coil that is wound around the core and that generates magnetic flux when excited to swing the armature, (a) a piezoelectric element is brought into contact with the spring, and (b) the piezoelectric element is brought into contact with the spring when driven. An impact printing head characterized by driving coils at the same time and making the spring force variable.