JPH0368440U

JPH0368440U -

Info

Publication number: JPH0368440U
Application number: JP12915889U
Authority: JP
Priority date: 1989-11-06
Filing date: 1989-11-06
Publication date: 1991-07-05

Description

[Brief explanation of drawings]

第１図は本考案に係る第１実施例を示す切欠平
面図、第２図は本考案に係る第１実施例を示す切
欠断面図、第３図は本考案に係る第１実施例を示
す要部切欠斜視図、第４図は本考案に係る第２実
施例を示す切欠平面図、第５図は本考案に係る第
２実施例を示す切欠断面図、第６図は従来のワイ
ヤドツト印字ヘツドを示す切欠断面図、第７図は
従来のワイヤドツト印字ヘツドを示す切欠平面図
、第８図は第７図のＢ−Ｂ断面図である。２……後コア、３……前コア、３５……前コア
、３６……後コア、４５……コイル、４６……コ
イル。 Fig. 1 is a cutaway plan view showing the first embodiment of the present invention, Fig. 2 is a cutaway sectional view showing the first embodiment of the invention, and Fig. 3 is a cutaway diagram showing the first embodiment of the invention. FIG. 4 is a cutaway plan view showing the second embodiment of the present invention; FIG. 5 is a cutaway sectional view showing the second embodiment of the present invention; FIG. 6 is a conventional wire dot printing diagram. 7 is a cutaway plan view showing a conventional wire dot printing head, and FIG. 8 is a sectional view taken along line B--B in FIG. 7. 2...rear core, 3...front core, 35...front core, 36...rear core, 45...coil, 46...coil.

Claims

[Claims for Utility Model Registration] 1. Consisting of a pair of cores arranged in the centripetal direction, a first core pair having a coil wound around the central core and a second core pair having a coil wound around the peripheral core. are arranged alternately in an annular shape, and the plate spring to which the armature is fixed is attracted by the magnetic flux of the permanent magnet, and the coils are selectively energized to apply magnetic flux in the opposite direction to the magnetic flux to the first and second core pairs. In a wire dot print head that prints by releasing a leaf spring attracted by the wire dot and protruding a print wire fixed to the armature, the cross-sectional area of the magnetic path formed in the peripheral core of the first core pair and the A wire dot printing head characterized in that the cross-sectional area of the magnetic path formed in the peripheral core of the second core pair is different from that of the magnetic path. 2 Consisting of a pair of cores each arranged in the centripetal direction, a first core pair in which a coil is wound around the central core and a second core pair in which a coil is wound around the peripheral core are alternately arranged in a ring shape. Then, the leaf spring fixed to the armature is attracted by the magnetic flux of the permanent magnet, and the attracted leaf spring is created by selectively energizing the coil to pass the magnetic flux in the opposite direction to the magnetic flux through the first and second core pair. In a wire dot printing head that prints by releasing the printing wire fixed to the armature and protruding, the cross-sectional area of the magnetic path formed in the center side core of the first core pair and the center side of the second core pair A wire dot printing head characterized in that the cross-sectional areas of the magnetic paths formed in the core are different.