JPS60219067A - Wire printing head - Google Patents
Wire printing headInfo
- Publication number
- JPS60219067A JPS60219067A JP7500184A JP7500184A JPS60219067A JP S60219067 A JPS60219067 A JP S60219067A JP 7500184 A JP7500184 A JP 7500184A JP 7500184 A JP7500184 A JP 7500184A JP S60219067 A JPS60219067 A JP S60219067A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- printing wire
- printing
- armature
- view
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/235—Print head assemblies
- B41J2/25—Print wires
- B41J2/26—Connection of print wire and actuator
Landscapes
- Impact Printers (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明はシリアルプリンタ等に用いられるワイヤ印字ヘ
ッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a wire print head used in serial printers and the like.
第１図は従来のこの種のバネチャージ形ワイヤ印字ヘッ
ドの半断面図で、図において１は永久磁石、２は後部ヨ
ーク、３はコア、４はコイル、５は板バネ、６はアーマ
チュア、７は印字ワイヤ、８は前部ヨーク、９は中間ヨ
ーク、１０はガイド部である。FIG. 1 is a half-sectional view of a conventional spring-charged wire print head of this type, in which 1 is a permanent magnet, 2 is a rear yoke, 3 is a core, 4 is a coil, 5 is a leaf spring, 6 is an armature, 7 is a printing wire, 8 is a front yoke, 9 is an intermediate yoke, and 10 is a guide portion.
前記後部ヨーク２上の外縁部には永久磁石１、中間ヨー
ク９及び前部ヨーク８が積層されており、かつ該前部ヨ
ーク８と中間ヨーク９との間に板バネ５の固定端が挾持
されている。この板バネ５の自由端にはアーマチュア６
が支持されており、該アーマチュア６の先端には印字ワ
イヤ７の基部が固着されていて、この印字ワイヤ７の先
端はヘッド中央部のガイド部１０から突出するように配
置されている。また、後部ヨーク２の中央部にはコア３
が設けられ、このコア３の外周にはコイル４が巻装され
ていて、両者によシミ磁石が形成されている。A permanent magnet 1, an intermediate yoke 9, and a front yoke 8 are stacked on the outer edge of the rear yoke 2, and the fixed end of the leaf spring 5 is held between the front yoke 8 and the intermediate yoke 9. has been done. An armature 6 is attached to the free end of this leaf spring 5.
is supported, and the base of a printing wire 7 is fixed to the tip of the armature 6, and the tip of the printing wire 7 is arranged so as to protrude from a guide portion 10 at the center of the head. In addition, a core 3 is provided in the center of the rear yoke 2.
A coil 4 is wound around the outer periphery of the core 3, and a stain magnet is formed on both of them.
この構成は、コイル４に通電しない状態ては、永久磁石
１の磁束が後部ヨーク２→コア３→アーマチユア６→前
部ヨーク８→中間ヨーク９を通り、その際コア３とアー
マチュア６との間に磁気吸引力が生じるだめ、アーマチ
ュア６がコア３に吸引されて板バネ５が緩いＳ字形を成
すように変形し、歪エネルギが蓄積される。In this configuration, when the coil 4 is not energized, the magnetic flux of the permanent magnet 1 passes through the rear yoke 2 → core 3 → armature 6 → front yoke 8 → intermediate yoke 9, and in this case, between the core 3 and the armature 6. As a magnetic attraction force is generated, the armature 6 is attracted to the core 3, the leaf spring 5 is deformed into a loose S-shape, and strain energy is accumulated.
この状態でコイル４に通電すると、該コイル４の磁束が
コア３とアーマデユア６との間の空隙において前記永久
磁石１の磁束を打消すため、アーマチュア６がコア３か
ら解放される。これによシ前記板バネ５に蓄積されてい
る歪エネルギが解放され、該板バネ５が復旧することに
よりアーマチュア６がコア３の角部を支点として図面上
時言１方向に回旋運動し、該アーマチュア６に固着され
ている印字ワイヤ７の先端がガイド部１０の前方に飛出
し、図示しないインクリボンを介して印字媒体を打撃し
て印字を行う。When the coil 4 is energized in this state, the magnetic flux of the coil 4 cancels the magnetic flux of the permanent magnet 1 in the gap between the core 3 and the armature 6, so that the armature 6 is released from the core 3. As a result, the strain energy stored in the leaf spring 5 is released, and as the leaf spring 5 recovers, the armature 6 rotates in the 1 direction in the drawing with the corner of the core 3 as a fulcrum. The tip of the printing wire 7 fixed to the armature 6 protrudes in front of the guide section 10 and hits the printing medium via an ink ribbon (not shown) to perform printing.
第２図は上述したワイヤ印字ヘッドの要部正面図で、印
字ワイヤ７の基部を銀ろう１１によりアーマチュア６の
先端に固着した状態を示している。FIG. 2 is a front view of the essential parts of the wire print head described above, showing a state in which the base of the print wire 7 is fixed to the tip of the armature 6 with silver solder 11.
壕だ、第３図は印字ワイヤ７の印字時の状態を示す説明
的側面図である。FIG. 3 is an explanatory side view showing the state of the printing wire 7 during printing.
第３図において印字ワイヤ７は第１図に示すガイド部１
０によシ案内され、アーマチュア６の回旋運動により印
字を行うため、この印字ワイヤ７の撓み支点部７ａ、ｒ
ｂには繰返し応力τ１が生じ、かつ印字ワイヤ７が持つ
矢印方向の速度成分と、該印字ワイヤ７の質量とによる
運動エネルギによって、印字ワイヤ１が４２口に示すよ
うに弦振動を行うため、この弦振動による繰返し応力τ
２が前記撓み支点部７ａ、７ｂに伺加される。また、印
字ワイヤ７の累月には強度にバラツキがあり、更にろう
付は条件のバラツキによるワイヤ強度やろう付は強度等
があるので、印字ワイヤ７の撓み支点部７ａ、７ｂには
τ１＋τ２の繰返し応力が生じ、更にまたろう付は側の
撓み支点部７ａには応力年中が起る。その結果、印字ワ
イヤ７の撓み支点部７ａｔたは７ｂでの破断あるいは撓
み支点部７ａでの釧ろう１１の剥離を生じるものがあシ
、大きな問題となっていた。In FIG. 3, the printing wire 7 is connected to the guide portion 1 shown in FIG.
0, and printing is performed by the rotational movement of the armature 6, the flexible fulcrum portions 7a, r of the printing wire 7
A repetitive stress τ1 is generated in b, and the printing wire 1 causes chordal vibration as shown at 42 due to the velocity component of the printing wire 7 in the direction of the arrow and the kinetic energy due to the mass of the printing wire 7. Repeated stress τ due to this string vibration
2 is added to the bending fulcrum portions 7a, 7b. In addition, the strength of the printing wire 7 varies depending on the length of time, and the wire strength of brazing varies depending on the variation of conditions, and the strength of brazing varies, so the bending fulcrum parts 7a and 7b of the printing wire 7 have a Repeated stress occurs, and stress also occurs at the side bending fulcrum portion 7a during brazing. As a result, the printing wire 7 may be broken at the bending fulcrum portion 7at or 7b, or the wire wax 11 may be peeled off at the bending support portion 7a, which has become a serious problem.
そこで、この対策として従来は、ワイヤ強度のバラツキ
を小さくしたり、ろう付は条件を一定に管理するのが困
難であることから印字ワイヤＩに生ずる繰返し応力τ１
を小さくシ、かつ係ろう１１の剥離に対する強さを向上
させるだめ、第・１図〜第６図に示すようにアーマチュ
ア６の先部に孔１２を設け、この孔１２に基部を先端部
よシ太くしたテーパ付きの印字ワイヤ１３あるいは段付
きの印字ワイヤ１４の基部を挿入し、その周囲を錫ろう
１１で固着するという手段を講じていた。Conventionally, countermeasures against this problem include reducing the variation in wire strength and reducing the repetitive stress τ1 generated in the printing wire I since it is difficult to maintain constant brazing conditions.
In order to reduce the size and improve the strength against peeling of the engagement solder 11, a hole 12 is provided at the tip of the armature 6 as shown in FIGS. A measure has been taken in which the base of a thickened tapered printing wire 13 or stepped printing wire 14 is inserted and its periphery is fixed with tin solder 11.
しかしながら、ワイヤ印字ヘッドの高速化を実現する目
的で、印字ワイヤの駆動周期を該印字ワイヤの固有弦振
動周期に漸近（この場合、当然共振点は避けている）さ
せて連続印字を行ったところ、テーパ伺きの印字ワイヤ
１３あるいは段付きの印字ワイヤ１４には、それぞれの
撓み支点部１３ａ＋１３ｂｔだは撓み支点部１４ａ、１
４ｂのいずれかへ破断するものが多く発生した。However, in order to increase the speed of the wire print head, continuous printing was performed by asymptoticing the drive period of the print wire to the natural chordal vibration period of the print wire (in this case, naturally avoiding the resonance point). , the tapered printing wire 13 or the stepped printing wire 14 has bending fulcrum parts 13a+13bt and flexing fulcrum parts 14a and 1, respectively.
There were many cases of breakage to either 4b.
そこで、この原因調査のため、連続印字後のテーバ伺き
の印字ワイヤ１３及び段付きの印字ワイヤ１４について
、その撓み支点部１３ａ、１３ｂ及び１４ ’ ｔ １
４ ｂが破断までには達していないものを観察したとこ
ろ、ワイヤ基部近辺の銀ろう１１が破断の起点であるこ
とが判明した。Therefore, in order to investigate the cause of this problem, we investigated the bending fulcrum portions 13a, 13b, and 14' t 1 of the printing wire 13 and the stepped printing wire 14 after continuous printing.
When 4b was observed to have not yet reached the point of breakage, it was found that the silver solder 11 near the base of the wire was the starting point of the breakage.
第７図は前記段付きの印字ワイヤ１４の撓み支点部１４
ａが破断を開始したときの状態を示す拡大断面図であり
、この図に示されるように印字ワイヤ１４の撓み支点部
１４ａ近辺の録ろう１２の表面からクラック１５ａが生
じ、このクラック１５ａが進行して段付きの印字ワイ″
ヤ１４の表面に１で達し、この表面に応力が集中しただ
め、撓み支点部１４ａにクラック１５ｂが生じる。FIG. 7 shows the bending fulcrum portion 14 of the stepped printing wire 14.
a is an enlarged cross-sectional view showing the state when the fracture starts, and as shown in this figure, a crack 15a is generated from the surface of the recording wax 12 near the bending fulcrum part 14a of the printing wire 14, and this crack 15a progresses. Stepped printing
1 reaches the surface of the layer 14, and as a result of stress concentration on this surface, a crack 15b occurs at the bending fulcrum portion 14a.
このようなプロセスで段付きの印字ワイヤ１４が破断し
たのであるが、との破断の原因は繰返し応力τ２の増大
である。The stepped printing wire 14 broke during this process, and the cause of the breakage was an increase in the repeated stress τ2.
従って、印字ワイヤの破断防止対策として、この繰返し
応力τ２を増大させないために、段付きの印字ワイヤ１
４の長手方向に複数個のワイヤガイド孔を設けることも
考えられているが、印字動作時にこのワイヤガイド孔の
内壁に段付きの印字ワイヤ１４が衝突して、この衝突に
よる繰返しの応力が新たに撓み支点部１４ａ、１４ｂに
加わるため、撓み支点部１４ａあるいは撓み支点部１４
ｂが破断する等、これらの撓み支点部１４ ａ、； １
４ｂの破断防止が困難であり、このことはチー・く付き
の印字ワイヤ１３についても同様である。Therefore, as a measure to prevent the printing wire from breaking, in order to prevent this repeated stress τ2 from increasing, the stepped printing wire 1
Although it has been considered to provide a plurality of wire guide holes in the longitudinal direction of the wire guide hole 4, the stepped printing wire 14 collides with the inner wall of the wire guide hole during the printing operation, and repeated stress due to this collision is newly generated. Since it is applied to the bending fulcrum parts 14a and 14b, the bending fulcrum part 14a or the bending fulcrum part 14
These bending fulcrum parts 14a,; 1
It is difficult to prevent the wire 4b from breaking, and the same applies to the printing wire 13 with a cheek.
更に、印字ワイヤの破断防止対策として、との破断の直
接の原因となる銀ろう１１におけるクラック１５ａの発
生を防止するため、銀ろう１１自身の強度向上が考えら
れたが、銀ろう１１がＡｇ。Furthermore, as a measure to prevent the printing wire from breaking, it has been considered to improve the strength of the silver solder 11 itself in order to prevent the generation of cracks 15a in the silver solder 11, which is a direct cause of breakage. .
Ｃｕ 、 Ｚｎ 、 Ｃｄ 、 Ｉｎ 、 Ｓｊ 、
Ｌｉ等の元素から組成されているだめ、どの組合わせを
考えてもおのずとその強度〔例えばＢＡＧ−１（Ａｇ４
５ ’ Ｃｕ１５−Ｚｎ１６−Ｃｄ２４）の引張り強さ
は約４５ｈ７− であり、通常印字ワイヤの素材として
使用されているタングステンカーバイドの引張シ強さく
約３００にり、／、′）と比較して約１／７程度〕に限
界があり、そのためワイヤ印字ヘッドの高速、高信頼度
化を実現させる上で大きな障害となっている。Cu, Zn, Cd, In, Sj,
Since it is composed of elements such as Li, its strength will naturally increase no matter what combination you consider [for example, BAG-1 (Ag4
The tensile strength of 5'Cu15-Zn16-Cd24) is approximately 45h7-, which is approximately 300% tensile strength of tungsten carbide, which is usually used as a material for printing wire. There is a limit of about 1/7], and this is a major obstacle in realizing high speed and high reliability of wire print heads.
本発明は上述した従来技術の問題点を解決するだめにな
されたもので、印字ワイヤの撓み支点部の破断を防止し
て長寿命化を割ると共に、安価で高速性のある信頼性の
高いワイヤ印字ヘッドを実現することを目的とするもの
である。The present invention was made to solve the above-mentioned problems of the prior art, and it prevents the flexure fulcrum of the printing wire from breaking, thereby increasing the lifespan of the printing wire. The purpose is to realize a print head.
この目的を達成するだめ、本発明は回旋運動するアーマ
チュアの、その回旋面に平行な側面に印字ワイヤの基部
を固着することによシ、印字ワイヤの応力分布を改善し
、印字時に印字ワイヤに繰返し生じる応力値を小さくす
ると共に、応力集中度合を緩和するようにしたものであ
る。To achieve this objective, the present invention improves the stress distribution of the printing wire by fixing the base of the printing wire to the side surface of the rotating armature parallel to the rotation plane of the armature, thereby improving the stress distribution of the printing wire during printing. This is designed to reduce the stress value that occurs repeatedly and to ease the degree of stress concentration.
以下図面を参照して実施例を説明する。 Examples will be described below with reference to the drawings.
第８図は本発明によるワイヤ印字ヘッドの第１の実施例
を示す要部正面図、第９図はその側面図である。この第
１の実施例は先部にＵ字形の溝１６を設けだアーマチュ
ア１７を用い、この溝１６内に印字ワイヤ７の基部を挿
入して、該印字ワイヤ７と溝壁１６ａ、１６ｂとを銀ろ
うＩｌａ、１１ｂによシ固着したものであり、つ捷り印
字ワイヤ７において最大繰返し応力τｌ十τ２が生ずる
部分である撓み支点部７ａ、７ｂを避けてアーマチュア
１７に銀ろう付けしたものである。FIG. 8 is a front view of essential parts of a first embodiment of the wire print head according to the present invention, and FIG. 9 is a side view thereof. This first embodiment uses an armature 17 having a U-shaped groove 16 at its tip, and inserts the base of the printing wire 7 into this groove 16 to connect the printing wire 7 and the groove walls 16a, 16b. It is fixed with silver solders Ila and 11b, and is silver-brazed to the armature 17 avoiding the bending fulcrum parts 7a and 7b, which are the parts where the maximum repeated stress τl + τ2 occurs in the twisted printing wire 7. be.
第１０図は第２の実施例を示す要部正面図、第１１図は
その側面図で、この第２の実施例は先部の一側を切欠い
たアーマチュア１８を用い、その切欠面１８ａに印字ワ
イヤ７の基部を銀ろう１１によシ固着したものであシ、
この第２の実施例も第１の実施例と同様に印字ワイヤ７
の撓み支点部７ａ、７ｂを避けてアーマチュア１８に銀
ろう付けしたものである。FIG. 10 is a front view of main parts showing the second embodiment, and FIG. 11 is a side view thereof. This second embodiment uses an armature 18 with one side of the tip cut out, and the cutout surface 18a is The base of the printing wire 7 is fixed with silver solder 11,
This second embodiment also has a printing wire 7 similar to the first embodiment.
The armature 18 is silver-brazed to avoid the bending fulcrum parts 7a and 7b.
第１２図は第３の実施例を示す要部正面図、第１３図は
その側面図で、この第３の実施例は先部を略Ｙ字形に形
成したアーマチュア１９を用い、その先部内側に印字ワ
イヤ７の基部を挿入して、前記第１の実施例と同様に銀
ろう１１ａ、１１ｂで固着したものである。FIG. 12 is a front view of main parts showing the third embodiment, and FIG. 13 is a side view thereof. This third embodiment uses an armature 19 whose tip is formed into a substantially Y-shape, and the inside of the tip. The base of the printing wire 7 is inserted into the holder and fixed with silver solder 11a and 11b in the same manner as in the first embodiment.
また、第１４図は第４の実施例を示す要部正面図、第１
５図はその正面図で、この第４の実施例は先部を曲折し
て段差を付けたアーマチュア２０を用い、その先部−側
に印字ワイヤ７の基部を第２の実施例と同様に銀ろう１
１によシ固着したものである。In addition, FIG. 14 is a front view of main parts showing the fourth embodiment, and FIG.
FIG. 5 is a front view of the armature 20, and the fourth embodiment uses an armature 20 with a step formed by bending the tip, and the base of the printing wire 7 is placed on the negative side of the tip in the same way as in the second embodiment. Silver wax 1
It is firmly attached to 1.
つまシ、第１から第４の実施例はいずれも印字ワイヤ７
の基部をアーマチュア１７〜１８の回旋面に平行々側面
に固着した構成としたものである。The printing wire 7 is used in the first to fourth embodiments.
The base of the armature is fixed to the side surface in parallel with the rotational surface of the armatures 17-18.
尚、他の構成については第１図と同様であるが、アーマ
チュアの回旋運動により印字ワイヤｔＪＫ動するもので
あれば摘要可能である。The other configurations are the same as those shown in FIG. 1, but can be summarized as long as the printing wire tJK moves due to the rotary movement of the armature.
このような構成による第１〜第４の各実施例は、いずれ
の場合も、印字ワイヤ７の印字動作時に撓み支点部７ａ
、７ｂに繰返し応力τ１＋τ２が生じても、この撓み支
点部７ａ、７ｂでの破断を防止して、印字ワイヤ７の長
寿命化を泪るものである。In each of the first to fourth embodiments having such a configuration, the bending fulcrum portion 7a of the printing wire 7 is bent during the printing operation.
, 7b, even if repeated stress τ1+τ2 is generated in the flexure fulcrum portions 7a, 7b, breakage is prevented, thereby extending the life of the printing wire 7.
このことを第４の実施例を例として第１６図〜第１８図
により説明する。This will be explained using FIGS. 16 to 18 using the fourth embodiment as an example.
第１６図及び第１７図において、印字ワイヤ７は第１図
に示すガイド部１０によってその先端位置が規制され、
この状態でアーマチュア２０が時計方向へ回旋運動する
ことによシ印字を行うため、該アーマチュア２０の回旋
方向と平行な軸Ｘ−Ｘ上の印字ワイヤ７の撓み支点部７
ａ、７ｂには最大の繰返し応力τｌ＋τ２が生じるわけ
であるが、本発明はこの撓み支点部７ａ、７ｂの応力分
布を改善するだめに、印字ワイヤ７において繰返し応力
τ１＋τ２が最も小さくなる部分である印字ワイヤ７の
Ｙ−Ｙ軸方向の側面部７ｃとアーマチュア２０が回旋運
動を行うときの回旋面２０ａとを銀ろう１１によって固
着しておシ、このときの応力分布を調査するため、本発
明と第２図に示した従来形の１０倍モテルを使い、Ｘ線
応力測定装置によりそれぞれの応力分布を調査した。そ
の結果を示したのが第１８図である。In FIGS. 16 and 17, the printing wire 7 has its tip position regulated by the guide section 10 shown in FIG.
In this state, the armature 20 rotates clockwise to perform printing, so the bending fulcrum 7 of the printing wire 7 on the axis X-X parallel to the rotation direction of the armature 20
The maximum repeated stress τl + τ2 is generated at the portions a and 7b, but in order to improve the stress distribution at the bending fulcrum portions 7a and 7b, the present invention aims to improve the stress distribution at the portions of the printing wire 7 where the repetitive stress τ1 + τ2 is the smallest. The side surface 7c of the printing wire 7 in the Y-Y axis direction and the rotational surface 20a used when the armature 20 performs rotational movement are fixed with silver solder 11, and in order to investigate the stress distribution at this time, the present invention Using the conventional 10x model shown in Figure 2, we investigated each stress distribution using an X-ray stress measuring device. FIG. 18 shows the results.
第１８図に示すように、本発明のものと従来形のものと
の撓み支点部での応力分布を比較すると、本発明のもの
は従来形のものに比べて応力値が約３０％低く、寸だ応
力分布曲線もゆるやかであることが確認された。As shown in FIG. 18, when comparing the stress distribution at the bending fulcrum part of the present invention and the conventional type, the stress value of the present invention is about 30% lower than that of the conventional type. It was confirmed that the stress distribution curve was also gentle.
この結果をふまえて実際に連続印字テストを行ったとこ
ろ、本発明のものは印字ワイヤ７の切断や銀ろう１１の
剥離が生じない極めて良好な結果が得られ、印字ワイヤ
７の大幅な長寿命化が実現された。Based on these results, we actually conducted a continuous printing test, and found that the product of the present invention produced very good results without causing the printing wire 7 to break or the silver solder 11 to peel off, and the printing wire 7 to have a significantly longer lifespan. has been realized.
以上説明したように本発明は、回旋運動するアーマチュ
アの回旋面に平行な側面に印字ワイヤの基部を固着する
構成としているため、印字ワイヤの撓み支点部における
応力分布が改善され、印字ワイヤの疲労にょる破断を本
質的に除去することが可能になるばかりでなく、印字ワ
イヤとアーマチュアとを固着している録ろうにががる応
力が剥離的から剪断的なものとなシ、銀ろう自身の疲労
強度も大幅に向上する。そのため従来のような印字ワイ
ヤの破断を防止することがてき、印字ワイヤ°の大幅な
長寿命を実現することができる。As explained above, the present invention has a configuration in which the base of the printing wire is fixed to the side surface parallel to the rotational surface of the armature that rotates, so that the stress distribution at the bending fulcrum of the printing wire is improved and fatigue of the printing wire is reduced. Not only does it become possible to essentially eliminate the occurrence of ruptures, but the stress caused by the adhesive bonding the printing wire to the armature is changed from peeling to shearing, and the silver solder itself The fatigue strength of the steel is also significantly improved. Therefore, it is possible to prevent the printing wire from breaking as in the conventional case, and it is possible to realize a significantly longer life of the printing wire.
寸だ、本発明によれば印字ワイヤの基部を従来のように
先端部より太くする必要がなく、がつアーマチュアにお
いても印字ワイヤの基５部を挿入して固着させるだめの
孔加工が不要となるため、印字ワイヤの低価格化及び軽
邦−化がＩＪＪ能となり、印字ワイヤの長寿命化ひいて
はワイヤ印字ヘッドの長寿命化と共に、低価格化、印字
の高速化、及び高信頼性化を実現できる等、多大な効果
が得られるものである。According to the present invention, there is no need to make the base of the printing wire thicker than the tip as in the conventional case, and there is no need to drill a hole for inserting and fixing the base 5 part of the printing wire in the armature. As a result, lower prices and lighter weight printing wires will enable IJJ to achieve longer lifespans for printing wires, which in turn extend the lifespan of wire printheads, as well as lower prices, faster printing speeds, and higher reliability. It is possible to achieve this, and a great deal of effect can be obtained.
第１図は従来のワイヤ印字ヘッドを示す半断面図、第２
図はその要部正面図、第３図は従来例の印字ワイヤが印
字を行ったときの状態を示す説明的側面図、第４図は従
来例における別の要部側断面図、第５図はその正面図、
第６図も従来例における別の要部Ｉ１１断面図、第７図
は第６図の印字ワイヤが破断を開始するときの状態を示
す拡大し、第８図は本発明によるワイヤ印字ヘッドの第
１の実施例を示す要部正面図、第９図はその側面図、第
１０図は第２の実施例を示′□ｊ−要部正面図、第１１
図はその側面図、第１２図は第３の実施例を示す要部正
面図、第１３図はその側面図、第１４図は第４の実施例
を示す要部正面図、第１５図はその側面図、第１６図は
第４の実施例における印字ワイヤの固着状態を示す拡大
正面図、第１７図はその印字ワイヤの印字時の状態を示
す拡大側面図、第１８図は本発明と従来形のものとの印
字ワイヤにおける応力分布の説明図である。
７・・・印字ワイヤ ７ａ、７ｂ・・・撓み支点部 ７
ｅ −側面部 １１ 、１１ａ、 １１ｂ−・−銀ろう
１６・・溝 １７ 、１８ 、１９ 、２０−７−−
−ｒチユ７２０ａ・・回旋面
特許出願人 沖電気工業株式会社
代理人 弁理士 金 倉 喬 ニ
嗣１回
７０
舗２− 軸３匡
角４二 輔５−
尚６−Figure 1 is a half-sectional view showing a conventional wire print head;
The figure is a front view of the main part, FIG. 3 is an explanatory side view showing the state when the printing wire of the conventional example performs printing, FIG. 4 is a side sectional view of another main part of the conventional example, and FIG. 5 is its front view,
FIG. 6 is also a sectional view of another main part I11 in the conventional example, FIG. 7 is an enlarged view showing the state when the printing wire in FIG. 6 starts to break, and FIG. 8 is a cross-sectional view of the wire printing head according to the present invention. FIG. 9 is a side view of the main part of the first embodiment; FIG. 10 is a front view of the main part of the second embodiment;
The figure is a side view, FIG. 12 is a front view of main parts showing the third embodiment, FIG. 13 is a side view thereof, FIG. 14 is a front view of main parts showing the fourth embodiment, and FIG. Its side view, FIG. 16 is an enlarged front view showing the fixed state of the printing wire in the fourth embodiment, FIG. 17 is an enlarged side view showing the state of the printing wire during printing, and FIG. FIG. 3 is an explanatory diagram of stress distribution in a printing wire of a conventional type and a printing wire of a conventional type. 7...Printing wire 7a, 7b...Bending fulcrum part 7
e - Side parts 11, 11a, 11b-- Silver solder 16... Grooves 17, 18, 19, 20-7--
-r Chuyu 720a... Convoluted surface patent applicant Oki Electric Industry Co., Ltd. agent Patent attorney Takashi Kanakura Nitsugu 1 time 70 Store 2- Shaft 3 Square 42 輔 5- Nao 6-
Claims (1)
該アーマチュアの回旋運動により印字ワイヤを駆動して
印字を行うワイヤ印字ヘッドにおいて、回旋面に平行な
アーマチュア側面に印字ワイヤの基部を固着したととを
特徴とするワイヤ印字ヘッド。1 Fix the base of the printing wire to the tip of the armature,
A wire print head that performs printing by driving a print wire by rotational movement of the armature, characterized in that a base portion of the print wire is fixed to a side surface of the armature parallel to a rotation surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7500184A JPS60219067A (en) | 1984-04-16 | 1984-04-16 | Wire printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7500184A JPS60219067A (en) | 1984-04-16 | 1984-04-16 | Wire printing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60219067A true JPS60219067A (en) | 1985-11-01 |
Family
ID=13563530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7500184A Pending JPS60219067A (en) | 1984-04-16 | 1984-04-16 | Wire printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60219067A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4974975A (en) * | 1988-09-01 | 1990-12-04 | Oki Electric Industry Co., Ltd. | Armature of printing head for use in wire printer |
| JP2009143175A (en) * | 2007-12-17 | 2009-07-02 | Nec Fielding Ltd | Printing head and manufacturing method for printing head |
-
1984
- 1984-04-16 JP JP7500184A patent/JPS60219067A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4974975A (en) * | 1988-09-01 | 1990-12-04 | Oki Electric Industry Co., Ltd. | Armature of printing head for use in wire printer |
| JP2009143175A (en) * | 2007-12-17 | 2009-07-02 | Nec Fielding Ltd | Printing head and manufacturing method for printing head |
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