JPS6323046U

JPS6323046U -

Info

Publication number: JPS6323046U
Application number: JP11672286U
Authority: JP
Priority date: 1986-07-31
Filing date: 1986-07-31
Publication date: 1988-02-16
Anticipated expiration: 2001-07-31
Also published as: JPH051407Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の第１実施例に係るワイヤド
ツト印字ヘツドを示す構成図、第２図は第１図の
Ａ―Ａ線断面図、第３図は吸引力特性を示すグラ
フ、第４図は消磁電流特性を示すグラフ、第５図
は第２実施例を示す構成図、第６図は従来例を示
す構成図、第７図は第６図のＢ―Ｂ線断面図、第
８，９，１０図は前記従来例を改良した第１、２
、３手段を示す構成図である。１……永久磁石、２……後部ヨーク、３，３
〜３……コア、４，４〜４……コイル、５
……板バネ、６，６〜６……アーマチユア、
７……印字ワイヤ、８……前部ヨーク、９……中
間ヨーク、１０……永久磁石による磁束の磁路、
１６，１６ａ，１６ｂ……センターポール、１７
……消磁磁束のバイパス磁路。 Fig. 1 is a configuration diagram showing a wire dot printing head according to a first embodiment of this invention, Fig. 2 is a sectional view taken along line A--A in Fig. 1, Fig. 3 is a graph showing suction force characteristics, and Fig. 4 5 is a block diagram showing the second embodiment, FIG. 6 is a block diagram showing the conventional example, FIG. 7 is a cross-sectional view taken along line BB in FIG. Figures 9 and 10 show the first and second improved versions of the conventional example.
, is a configuration diagram showing three means. 1... Permanent magnet, 2... Rear yoke, 3,3
~3...Core, 4, 4~4...Coil, 5
...plate spring, 6,6~6...armature,
7... Printing wire, 8... Front yoke, 9... Middle yoke, 10... Magnetic flux path by permanent magnet,
16, 16a, 16b...Center pole, 17
...Bypass magnetic path for demagnetizing magnetic flux.

Claims

[Claim for Utility Model Registration] The armature is attracted by the magnetic flux of the permanent magnet, causing the leaf spring to bend, and the magnetic flux of the permanent magnet is canceled by the demagnetizing flux of the coil wound around the core, and the armature is moved by the restoring force of the leaf spring. In the wire dot printing head, which prints by protruding the printing wire fixed to the tip of the armature by releasing the armature, a center pole is provided on the opposite side of the core from the permanent magnet and adjacent to the core; A wire dot print head characterized in that a demagnetizing magnetic flux is passed through a pole to form a bypass magnetic path for the demagnetizing magnetic flux.