JPH042641U

JPH042641U -

Info

Publication number: JPH042641U
Application number: JP4311290U
Authority: JP
Priority date: 1990-04-24
Filing date: 1990-04-24
Publication date: 1992-01-10
Anticipated expiration: 2005-04-24
Also published as: JPH0719796Y2

Description

[Brief explanation of the drawing]

第１図は本考案のワイヤドツト印字ヘツドの要
部斜視図、第２図は本考案のワイヤドツト印字ヘ
ツドに使用されるバツクポールの斜視図、第２図
Ａは第１のバツクポールの斜視図、第２図Ｂは第
２のバツクポールの斜視図、第３図は本考案の他
の実施例を示すワイヤドツト印字ヘツドの永久磁
石を示す図、第４図は付加磁石を示す図、第５図
は付加磁石を取り付けたときの第３図の永久磁石
の断面図、第５図ＡはＡ−Ａ断面図、第５図Ｂは
Ｂ−Ｂ断面図、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ド印字ヘ
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
ワイヤドツト印字ヘツドの分解斜視図、第１４図
は更に他の従来の実施例のワイヤドツト印字ヘツ
ドにおけるアーマチユアを示す図、第１４図Ａは
第１０図に示す磁路に配設されるアーマチユアの
平面図、第１４図Ｂは同側面図、第１４図Ｃは第
１１図の磁路に配設するアーマチユアの平面図、
第１４図Ｄは同側面図、第１５図は第１４図のア
ーマチユアの配置図、第１６図は２系統の磁路を
形成した更に他の従来のワイヤドツト印字ヘツド
におけるバツクポール斜視図、第１６図Ａは第１
のバツクポール斜視図、第１６図Ｂは第２のバツ
クポール斜視図、第１７図はヨーク平面図、第１
８図はワイヤドツト印字ヘツドのヘツドフレーム
を取り除いた状態の要部斜視図である。３１……アーマチユア、３４……永久磁石、３
５……コア、６１ａ，６１ｂ……バツクポール。 Fig. 1 is a perspective view of essential parts of the wire dot print head of the present invention, Fig. 2 is a perspective view of a back pole used in the wire dot print head of the present invention, Fig. 2A is a perspective view of the first back pole, and Fig. 2A is a perspective view of the first back pole. Figure B is a perspective view of the second back pole, Figure 3 is a diagram showing a permanent magnet of a wire dot print head showing another embodiment of the present invention, Figure 4 is a diagram showing an additional magnet, and Figure 5 is a diagram showing an additional magnet. 3 is a sectional view of the permanent magnet when attached, FIG. 5A is an AA sectional view, FIG. 5B is a BB sectional view, FIG. 6 is a sectional view of a conventional wire dot print head, 7 is a sectional view taken along the line A-A in FIG. 6, FIG. 8 is a perspective view of the main part of a conventional wire dot print head, FIG. 9 is a plan view of the main part of another conventional wire dot print head, and FIG. 9 is a sectional view taken along line B-B, FIG. 11 is a sectional view taken along line C-C, FIG. 12 is a perspective view of the main parts of the wire dot printing head, FIG. Furthermore, FIG. 14A is a plan view of the armature disposed in the magnetic path shown in FIG. 10, FIG. 14B is a side view of the same, and FIG. Figure C is a plan view of the armature installed in the magnetic path in Figure 11;
FIG. 14D is a side view of the same side, FIG. 15 is a layout diagram of the armature shown in FIG. 14, FIG. 16 is a perspective view of a back pole in yet another conventional wire dot printing head forming two magnetic paths, and FIG. A is first
Figure 16B is a perspective view of the second back pole, Figure 17 is a plan view of the yoke, and Figure 16B is a perspective view of the second back pole.
FIG. 8 is a perspective view of the main part of the wire dot printing head with the head frame removed. 31... Armature, 34... Permanent magnet, 3
5... Core, 61a, 61b... Back pole.

Claims

[Claims for Utility Model Registration] (1) An armature with a printing wire fixed to its tip, a core provided opposite to the armature, and a leaf spring to which the armature is joined and supported in a cantilevered manner. , a permanent magnet that generates magnetic flux and attracts the armature to the core against the elastic force of the leaf spring; and a permanent magnet that is wound around the core and generates magnetic flux from the core when energized; In the wire dot printing head, which consists of a coil that cancels out the force and releases the armature, (a) a plurality of back poles arranged in the circumferential direction and forming a pivot point for the armature; and (b) a plurality of back poles that form a pair with each back pole. and (c) each pair of back pole and core, one with a permanent magnet on the back pole side and the other with a permanent magnet on the core side. (d) Pairs of back poles with permanent magnets arranged on the back pole side have a lower surface facing the armature and permanent magnets than pairs of back poles with permanent magnets arranged on the core side. A wire dot print head characterized by a large area of the surface facing the magnet. (2) An armature with a printing wire fixed to its tip, a core provided opposite to the armature, a leaf spring to which the armature is joined and supported in a cantilevered manner, and generates magnetic flux to A permanent magnet that attracts the armature to the core against the elastic force of the spring, and a coil that is wound around the core and generates magnetic flux from the core when energized, canceling the magnetic flux of the permanent magnet and releasing the armature. A wire dot printing head consisting of (a) a plurality of back poles arranged in the circumferential direction and forming a pivot point for the armature, and (b) arranged inside them so as to form a pair with each back pole. a plurality of cores; (c) each pair of back pole and core is alternately arranged with a pair having a permanent magnet arranged on the back pole side and a pair having a permanent magnet arranged on the core side, and (d ) A wire dot printing head characterized in that a pair of permanent magnets with a permanent magnet arranged on the back pole side has a larger magnetomotive force than a pair of permanent magnets with a permanent magnet arranged on the core side. (3) A pair of back poles with a permanent magnet placed on the back pole side has a larger surface area facing the armature and a surface facing the permanent magnet compared to a pair of back poles with a permanent magnet placed on the core side. A wire dot printing head according to claim 2.