JPS5831142U - dot printing head - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来例を示す側断面図、第２図は本考案の一実
施例を示す側断面図、第３図は第２図における板ばねの
自由端部分の平面図、第４図Ａ。 Ｂは第２図の実施例の動作を示す部分断面図、第５図Ａ
、　Ｂは従来例と本考案におけるアーマチュアの飛行波
形を示す図である。 １・・・・・・台板、２・・・・・・永久磁石、３・・
・・・・電磁石、３ａ・・・・・・コア、３ｂ・・・・
・・コイル、４・・・・・・板ばね、６・・・・・・ア
ーマチュア、７・・・・・・ドツトワイヤ、９・・・・
・・ガイドフレーム、１０・・・・・・ヨーク、１０ａ
・・・・・・切欠部、１１・・・・・・ストッパ。 麺３　； −踊５ＣｇFig. 1 is a side sectional view showing a conventional example, Fig. 2 is a side sectional view showing an embodiment of the present invention, Fig. 3 is a plan view of the free end portion of the leaf spring in Fig. 2, and Fig. 4 A. . B is a partial sectional view showing the operation of the embodiment in FIG. 2, and FIG. 5A is a partial sectional view showing the operation of the embodiment in FIG.
, B is a diagram showing flight waveforms of the armature in the conventional example and the present invention. 1... Base plate, 2... Permanent magnet, 3...
...Electromagnet, 3a...Core, 3b...
... Coil, 4 ... Leaf spring, 6 ... Armature, 7 ... Dot wire, 9 ...
...Guide frame, 10...Yoke, 10a
...Notch, 11... Stopper. Noodles 3; -Dance 5Cg

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 環状の永久磁石と、該永久磁石の内側に配置された電磁
石と、該永久磁石上に積層されかつ求心方向に向けて自
由端が形成された略円板形の板ばねと、該板ばねの自由
端に固着されたアーマチュアと、該アーマチュアに設け
られたドツトワイヤを備えており、永久磁石の磁束によ
りアーマチュアを電磁石のコアで吸引して板ばねを偏倚
させ、電磁石を励磁することにより永久磁石あ磁束を打
消して板ばねの復旧力によりドツトワイヤを駆動して印
字を行うドツト印字ヘッドにおいて、アーマチュアを板
ばねの下面に固着して電磁石のコアと対向させ、永久磁
石と板ばねとの間にヨークを装着すると共に、該ヨーク
の板ばねと接触する面を該ヨークが無い状態で板ばねが
撓んだときの撓み曲線とほぼ同一の形状にしたことを特
徴とするドツト印字ヘッド。An annular permanent magnet, an electromagnet disposed inside the permanent magnet, a substantially disc-shaped leaf spring laminated on the permanent magnet and having a free end facing in the centripetal direction, and a leaf spring of the leaf spring. It is equipped with an armature fixed to the free end and a dot wire provided on the armature.The magnetic flux of the permanent magnet attracts the armature with the core of the electromagnet, biasing the leaf spring, and exciting the electromagnet. In a dot print head that cancels the magnetic flux and drives a dot wire using the restoring force of a leaf spring to print, the armature is fixed to the lower surface of the leaf spring and faces the core of the electromagnet, and a permanent magnet is placed between the permanent magnet and the leaf spring. A dot print head characterized in that a yoke is attached and the surface of the yoke that contacts the leaf spring has a shape that is almost the same as the deflection curve when the leaf spring is bent without the yoke.