JPS649741U

JPS649741U -

Info

Publication number: JPS649741U
Application number: JP10335887U
Authority: JP
Priority date: 1987-07-07
Filing date: 1987-07-07
Publication date: 1989-01-19
Anticipated expiration: 2002-07-07
Also published as: JPH0630445Y2

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主
要部の分解斜視図、第２図は従来のワイヤドツト
印字ヘツドの主要部の断面図、第３図から第５図
までは、従来例における印字ワイヤのストローク
に対応する板バネのたわみ力と永久磁石の吸引力
及びアーマチユアに実際に作用する吸引力との関
係を示す種々の場合のグラフ、第６図は第１図の
構成の印字ヘツドを組み立てた場合の主要部断面
図、第７図はこの場合の支点部材の近傍の要部拡
大図、第８図はこの場合の印字ワイヤのストロー
クに対応する板バネ３のたわみ力と永久磁石の吸
引力及びアーマチユアに実際に作用する実際に作
用する吸引力との関係を示すグラフ、第９図は本
考案の変形例を示す主要部の断面図、第１０図は
その支持部材近傍の部分拡大図である。１……印字ワイヤ、２……アーマチユア、３…
…板バネ、８……電磁石、１５……支持部材、Ｍ
１，Ｍ２……支持点。 Fig. 1 is an exploded perspective view of the main parts of the wire dot print head of the present invention, Fig. 2 is a sectional view of the main parts of the conventional wire dot print head, and Figs. 3 to 5 show the printing wire in the conventional example. Graphs showing the relationship between the deflection force of the leaf spring corresponding to the stroke, the attraction force of the permanent magnet, and the attraction force actually acting on the armature in various cases. Figure 6 shows the print head constructed as shown in Figure 1 assembled. Fig. 7 is an enlarged view of the main part near the fulcrum member in this case, and Fig. 8 shows the deflection force of the leaf spring 3 and the attractive force of the permanent magnet corresponding to the stroke of the printing wire in this case. FIG. 9 is a sectional view of the main part showing a modification of the present invention, and FIG. 10 is a partially enlarged view of the vicinity of the support member. be. 1... Printing wire, 2... Armature, 3...
...Plate spring, 8...Electromagnet, 15...Support member, M
1, M2...Support point.

Claims

[Scope of Claim for Utility Model Registration] In a spring charge type wire dot printing head, an armature to which a printing wire is fixed to one end, a leaf spring that fixes this armature to a free end side and applies printing force to the printing wire, and this leaf spring. a magnet that attracts the armature against the printing force in order to charge the armature with strain energy; and a fulcrum member that sets a fulcrum of movement, and this fulcrum member is configured to:
A wire dot print head characterized in that it has a plurality of support points that contact the leaf spring at at least two points at different timings.