JPH02117145U

JPH02117145U -

Info

Publication number: JPH02117145U
Application number: JP2618589U
Authority: JP
Priority date: 1989-03-09
Filing date: 1989-03-09
Publication date: 1990-09-19
Anticipated expiration: 2004-03-09
Also published as: JPH0716438Y2

Description

[Brief explanation of drawings]

第１図は、本考案のワイヤドツト印字ヘツドの
要部断面図、第２図は他の部分の要部断面図、第
３図はヘツドフレームを取り除いた状態の平面図
、第４図はアーマチユア、板バネ、金属レシジユ
アルシートを取り除いた状態の平面図、第５図は
ヘツドフレームを取り除いた状態の要部斜視図、
第６図は従来のワイヤドツト印字ヘツドの断面図
、第７図は第６図のＡ−Ａ断面図、第８図は従来
のワイヤドツト印字ヘツドの要部斜視図、第９図
は他の従来のワイヤドツト印字ヘツドの要部平面
図、第１０図は第９図のＢ−Ｂ断面図、第１１図
は同Ｃ−Ｃ断面図、第１２図はワイヤドツト印字
ヘツドの要部斜視図、第１３図は同分解斜視図で
ある。３１……アーマチユア、３２……板バネ、３３
……印字ワイヤ、３４……永久磁石、３５……コ
ア、３６……バツクポール、３７……ベースプレ
ート、４１……励磁コイル、５１……アーマチユ
アヨーク。 Fig. 1 is a sectional view of the main part of the wire dot printing head of the present invention, Fig. 2 is a sectional view of the main part of other parts, Fig. 3 is a plan view with the head frame removed, Fig. 4 is the armature, A plan view with the leaf spring and metal residual sheet removed; Figure 5 is a perspective view of the main parts with the head frame removed;
FIG. 6 is a sectional view of a conventional wire dot print head, FIG. 7 is a sectional view taken along line A-A in FIG. 10 is a sectional view taken along line BB in FIG. 9, FIG. 11 is a sectional view taken along line CC in FIG. 9, FIG. 12 is a perspective view of important parts of the wire dot print head, and FIG. 13 is a sectional view taken along line C-C in FIG. is an exploded perspective view. 31... Armature, 32... Leaf spring, 33
... Printing wire, 34 ... Permanent magnet, 35 ... Core, 36 ... Back pole, 37 ... Base plate, 41 ... Excitation coil, 51 ... Armature yoke.

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 leaf spring to which the armature is joined and supported in a cantilevered manner, and a magnetic flux is generated to resist the elastic force of the leaf spring to move the armature to the core. In a wire dot printing head consisting of a permanent magnet that is attracted, and a coil that is wound around the core and that generates magnetic flux from the core when energized and cancels the magnetic flux of the permanent magnet and releases the armature, (a) circumference; (b) a plurality of cores disposed inside each back pole so as to form a pair with each back pole, and (c) a back pole and a core. (d) pairs with permanent magnets arranged on the back pole side and pairs with permanent magnets arranged on the core side alternately, and (d) pairs with permanent magnets arranged on the back pole side. A wire dot printing head characterized in that, in addition to a magnetic path connecting a back pole and an armature, a magnetic path is formed to connect the two via an armature yoke.