JPH0226755A - Impact dot head - Google Patents

Abstract

PURPOSE:To lower noises, and to lengthen a lifetime by installing a permanent magnet having poles in the direction of operation to an operating section driving a printing wire while mounting a magnetic coil having a fixed permanent magnet generating magnetic poles at positions oppositely faced to each pole of the permanent magnet and denying the magnetic poles of the permanent magnet. CONSTITUTION:Permanent magnets 4 receive the resiliency of the mutually opposite directions from both left and right yoke ends, and are held at positions where force balances. The magnetic poles of the yoke ends 6 are denied by conducting coils 8 on printing. Levers 1 are turned in the counterclockwise direction centering around shafts 2 by resiliency among the yoke ends 7 and the permanent magnets 4 at that time, and printing wires 3 are driven. The magnetic poles of the yoke ends 7 are denied by conducting coils 9 on return. The levers 1 are rotated in the clockwise direction centering around the shafts 2 by resiliency among the yoke ends 6 and the permanent magnets 4 in this case, the printing wires 3 are returned, and conduction through the coils 9 is completed, thus stopping the title dot head at a non-printing stand-by position.

Description

【発明の詳細な説明】 〔産業上の利用分野１ 本発明はインパクトドツトプリンタの印字ヘッドに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a print head for an impact dot printer.

［従来の技術１ 従来の技術はバネ力により印字ワイヤ駆動部を度当り・
に突き当て、非印字待機位置の位置決めを行なっていた
。[Conventional technology 1] The conventional technology uses a spring force to move the printing wire drive unit per time.
The printer was positioned at the non-printing standby position.

〔発明が解決しようとする課題］ しかし、かかる従来のインパクトドツトヘッドは非印字
待機位置の位置決めを印字ワイヤ駆動動作部をバネ力で
度当りへ突き当てることにより行なっているため、印字
後、待機位置への復帰時に印字ワイヤ駆動動作部と度当
りの衝突が避けられず騒音を発生すると共にワイヤ駆動
動作部と度当り双方が摩耗するため寿命が短いという問
題点を有していた。また、印字ワイヤ駆動動作部を度当
りに突き当てるバネ力を太き（すると電磁エネルギを印
字ワイヤの運動エネルギに変換する効率が低下するため
バネ力は小さい設定となっており、従って印字後待機位
置への復帰速度が低く、高速駆動できないという問題を
有していた。[Problems to be Solved by the Invention] However, in such conventional impact dot heads, the non-printing standby position is positioned by abutting the printing wire drive operation section against the perpendicular area using spring force. When returning to the position, a collision between the printing wire drive unit and the perforator is unavoidable, which generates noise, and both the wire drive unit and the perforator wear out, resulting in a short service life. In addition, the spring force that causes the printing wire drive unit to strike against each other is made thicker (this reduces the efficiency of converting electromagnetic energy into kinetic energy of the printing wire, so the spring force is set to be small, and therefore, the spring force is set to be small. The problem was that the return speed to the position was low and high-speed driving was not possible.

そこで、本発明は従来のこのような問題点を解決するた
め非印字待機位置の位置決めを永久磁石の反発力の釣り
合う位置として設定することにより印字後行機位置への
復帰時に印字ワイヤ駆動動作部と他部材が衝突すること
を避けられ、低騒音で寿命が長いインパクトドツトヘッ
ドを提供することを目的とする。また、永久６ｎ石の反
発力をコイルにより制御することにより印字ワイヤ駆動
動作部を急速に加減速し、高速駆動を可能とするインパ
クトドツトヘッドを提供することを目的とする。Therefore, in order to solve these conventional problems, the present invention sets the positioning of the non-printing standby position as a position where the repulsive force of the permanent magnet is balanced, so that the printing wire drive operation section is not activated when returning to the printing trailing machine position. The purpose of the present invention is to provide an impact dot head that can avoid collision between the dot and other parts, has low noise, and has a long life. Another object of the present invention is to provide an impact dot head that rapidly accelerates and decelerates the printing wire drive unit by controlling the repulsive force of the permanent 6n stone with a coil, thereby enabling high-speed drive.

〔課題を解決するための手段１ 上記課題を解決するため、本発明のインパクトドツトヘ
ッドは印字ワイヤを駆動する動作部に動作方向に６Ｒ極
が形成された永久磁石と、永久磁石の各磁極に対して反
発力を与久る固定永久磁石とを有することを特徴とする
。また、印字ワイヤを駆動する動作部に備えた永久磁石
の各磁極と対向する位置の磁極を打ち消す電磁コイルを
備えたこと特徴とする。[Means for Solving the Problems 1] In order to solve the above problems, the impact dot head of the present invention includes a permanent magnet in which 6R poles are formed in the operating direction in the operating part that drives the printing wire, and each magnetic pole of the permanent magnet. It is characterized by having a fixed permanent magnet that exerts a repulsive force against the magnet. Further, the present invention is characterized in that it includes an electromagnetic coil that cancels the magnetic poles at positions facing each magnetic pole of the permanent magnet provided in the operating section that drives the printing wire.

［作　用］ 上記のように構成されたインパクトドツトヘッドは非印
字待機位置の位置決めを永久磁石の反発力の釣り合う位
置として設定することにより印字後行機位置への復帰時
に印字ワイヤ駆動動作部は他部材と衝突接触を避けられ
るため、低騒音で長寿命なインパクトドツトヘッドとす
ることができる。また、永久磁石の反発力を、印字ワイ
ヤを駆動する動作部に備えられた永久磁石の各種と対向
する位置の磁極を打ち消す電磁コイルを用いて永久磁石
の反発力を制御することにより印字ワイヤ駆動部を急速
に加減速し、高速駆動を可能とすることができる。[Function] The impact dot head configured as described above sets the non-printing standby position as a position where the repulsive force of the permanent magnet is balanced, so that the printing wire drive operation section is activated when returning to the printing trailing machine position. Since collision contact with other members can be avoided, an impact dot head with low noise and long life can be achieved. In addition, the printing wire is driven by controlling the repulsive force of the permanent magnet using an electromagnetic coil that cancels out the magnetic poles located opposite the various types of permanent magnets provided in the operating unit that drives the printing wire. It is possible to rapidly accelerate and decelerate the parts and enable high-speed driving.

［実　施　例］ 以下に本発明の第１実施例を図面にもとづいて説明する
。第１図は本発明のインパクトドツトヘッドの断面図で
ある。第１図下半分には非印字待機時の状態を示し、上
半分には印字時の状態を示しである。レバ１は図示せざ
る軸受により軸２を介して回転自在に支持され、一端に
は印字ワイヤ３が、他端には永久磁石４が固着されてい
る。[Example] A first example of the present invention will be described below based on the drawings. FIG. 1 is a sectional view of the impact dot head of the present invention. The lower half of FIG. 1 shows the non-printing standby state, and the upper half shows the printing state. The lever 1 is rotatably supported via a shaft 2 by a bearing (not shown), and has a printing wire 3 fixed to one end and a permanent magnet 4 fixed to the other end.

永久磁石４は左右方向図示の如＜Ｓ、Ｎ極を持つように
着磁され、永久磁石５は、ヨーク端６がこれに対向する
永久磁石の極と同極の極性を持つように着磁されている
。従って永久磁石４は左右双方のヨーク端より互いに逆
向きの反発力を受け、力のつり合った位置に保持される
。印字時はコイル８に通電することによりヨーク端６の
磁極を打消す。この時ヨーク端７と永久磁石４間の反発
力によりレバ１は軸２の回りを反時計方向に回転し印字
ワイヤ３を打ち出す、また、復帰時はコイル９に通電す
ることによりヨーク端７の磁極を打消す。この時ヨーク
端６と永久磁石４間の反発力によりレバ１は軸２の回り
を時計方向に回転し印字ワイヤ３を復帰させ、コイル９
への通電を終了することにより非印字待機位置へ停止す
る０本実施例では第１図において右側がＳ極、左側がＮ
極となるようにしたが反発力を発生するためには対向す
る極が同極であれば、Ｓ極でもＮ極でも良いため、第１
図のＳ極、Ｎ極を逆転させてもコイル８．９を逆方向巻
きないし逆方向通電を行なえば同一の効果を得ることは
明白である。The permanent magnet 4 is magnetized so that it has <S and N poles in the left-right direction as shown in the figure, and the permanent magnet 5 is magnetized so that the yoke end 6 has the same polarity as the polarity of the permanent magnet facing it. has been done. Therefore, the permanent magnet 4 receives repulsive forces from both the left and right yoke ends in opposite directions, and is held in a position where the forces are balanced. During printing, the magnetic pole of the yoke end 6 is canceled by energizing the coil 8. At this time, the lever 1 rotates counterclockwise around the shaft 2 due to the repulsive force between the yoke end 7 and the permanent magnet 4, and the printing wire 3 is ejected. Cancel magnetic poles. At this time, the lever 1 rotates clockwise around the shaft 2 due to the repulsive force between the yoke end 6 and the permanent magnet 4, and the printing wire 3 is returned to its original position.
In this embodiment, the right side is the S pole and the left side is the N pole in Fig. 1.
However, in order to generate a repulsive force, as long as the opposing poles are the same polarity, they can be S or N poles, so the first
It is clear that even if the S and N poles in the figure are reversed, the same effect can be obtained if the coils 8 and 9 are wound in the opposite direction or energized in the opposite direction.

以下に本発明の第２実施例を第２図を用いて説明する。A second embodiment of the present invention will be described below with reference to FIG.

第２図は本実施例のインパクトドツトヘッドの断面図で
ある。第２図下半分には非印字待機時の状態を示し、上
半分には印字時の状態を示しである０本実施例は第１実
施例に対してプランジャ１０、ヨーク１１、コイル１２
を付加したものであり、印字時にコイル１２へ通電する
ことによりヨーク１１、プランジャ１０間の吸引力を発
生させ、レバー１を軸２のまわり反時計方向の回転力を
与える以外は第一実施例と同一である。FIG. 2 is a sectional view of the impact dot head of this embodiment. The lower half of FIG. 2 shows the state during non-printing standby, and the upper half shows the state during printing.
This is the same as the first embodiment except that when printing, the coil 12 is energized to generate an attractive force between the yoke 11 and the plunger 10, and the lever 1 is given a counterclockwise rotational force around the shaft 2. is the same as

従って磁極の組合わせ、コイルの通電順序の組合わせは
第一実施例と全く同一に可能である。なお、本実施例は
第一実施例に比してレバーｌへの加勢力が強いため、よ
り高速駆動が可能となる。Therefore, the combination of magnetic poles and the order of energization of the coils can be exactly the same as in the first embodiment. Note that in this embodiment, the force applied to the lever l is stronger than in the first embodiment, so that higher speed driving is possible.

以下に本発明の第三実施例を第３図を用いて説明する。A third embodiment of the present invention will be described below with reference to FIG.

第６図は本実施例のインパクトドツトヘッドの断面図で
ある。第３図下半分には非印字待磯時の状態を示し、上
半分には印字時の状態を示しである。本実施例は第２実
施例のコイル８、コイル９を除去したものであり、印字
時にコイル１２へ通電することによりヨーク１１、プラ
ンジャ１０間の吸引力を発生させ、レバーｌを軸２のま
わり反時計方向の回転力を与えて印字ワイヤ３を打ち出
し印字し、復帰時は永久磁石４、ヨーク端６間の反発力
と永久ｉｉｎ石７、ヨーク端７間の反発力の差分により
復帰する。なお、永久磁石の極性は第一実施例で述べた
と同様に、全ての極性の組合わせでも同様の効果が得ら
れ、第二実施例に比して安価となる。FIG. 6 is a sectional view of the impact dot head of this embodiment. The lower half of FIG. 3 shows the state at the time of non-printing standby, and the upper half shows the state at the time of printing. In this embodiment, the coils 8 and 9 of the second embodiment are removed, and by energizing the coil 12 during printing, an attractive force is generated between the yoke 11 and the plunger 10, and the lever l is moved around the shaft 2. A counterclockwise rotational force is applied to drive out the printing wire 3 for printing, and when it returns, it returns due to the difference between the repulsive force between the permanent magnet 4 and the yoke end 6 and the repulsive force between the permanent IIN stone 7 and the yoke end 7. Note that the polarity of the permanent magnet is the same as that described in the first embodiment, and the same effect can be obtained with all combinations of polarities, and the cost is lower than that of the second embodiment.

［発明の効果］ 本発明のインパクトドツトヘッドは、以上説明したよう
に印字ワイヤを駆動する動作部に動作方向に極を有する
永久磁石を備えると共に前記永久磁石の各種と対向する
位置に磁極を発生する固定永久磁石を有し、該永久磁石
の磁極を打ち消す電磁コイルを備＾ることにより、非印
字待機位置の位置決めを部材の突き当てなど接触方式を
採らすに行えるため、印字文待機位置への復帰時にワイ
ヤ駆動動作部と他部材が衝突することを避けられ、低騒
音化と長寿命化を得る効果が有る。また、永久磁石の反
発力をコイルにより制御することにより印字ワイヤ駆動
動作部を急速に加減速し、高速駆動を可能にする効果が
有る。[Effects of the Invention] As explained above, the impact dot head of the present invention includes a permanent magnet having a pole in the operating direction in the operating section that drives the printing wire, and generates magnetic poles at positions facing each type of the permanent magnet. By having a fixed permanent magnet and an electromagnetic coil that cancels out the magnetic poles of the permanent magnet, the non-printing standby position can be positioned by a contact method such as abutment of a member. Collision between the wire drive operating section and other members can be avoided when the wire is returned to its original position, resulting in lower noise and longer life. In addition, by controlling the repulsive force of the permanent magnet with a coil, the printing wire drive operation section can be rapidly accelerated and decelerated, thereby making it possible to drive at high speed.

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

第１図は本発明第一実施例の断面図、第２図は本発明第
二実施例の断面図、第３図は本発明第三実施例の断面図
。 ・レバ ・軸 ・印字ワイヤ ・永久磁石 ・永久磁石 ・ヨーク端 ・ヨーク端 ・コイル コイル プランジャ ヨーク コイル 以上 出願人　セイコーエプソン株式会社 代理人　弁理士　鈴　木　喜三部（他１名）第１図 第２図FIG. 1 is a sectional view of a first embodiment of the invention, FIG. 2 is a sectional view of a second embodiment of the invention, and FIG. 3 is a sectional view of a third embodiment of the invention.・Lever・Shaft・Printing wire・Permanent magnet・Permanent magnet・Yoke end・Yoke end・Coil coil plunger Yoke coil Applicant Seiko Epson Corporation Representative Patent attorney Kizobe Suzuki (1 other person) Figure 1 Figure 2

Claims (2)

【特許請求の範囲】[Claims] （１）電磁石により印字ワイヤを選択的に駆動して衝撃
印字する形式のインパクトドットヘッドにおいて、前記
印字ワイヤを駆動する動作部に動作方向に磁極が形成さ
れた永久磁石と、前記永久磁石の各磁極に対して反発力
を与える固定永久磁石とを有することを特徴とするイン
パクトドットヘッド。(1) In an impact dot head that performs impact printing by selectively driving a printing wire using an electromagnet, a permanent magnet having a magnetic pole formed in the operating direction in an operating part that drives the printing wire, and each of the permanent magnets An impact dot head characterized by having a fixed permanent magnet that provides a repulsive force to a magnetic pole. （２）請求項１記載のインパクトドットヘッドにおいて
、印字ワイヤを駆動する動作部に備えた永久磁石の各磁
極と対向する位置の磁極を打ち消す電磁コイルを備えた
ことを特徴とするインパクトドットヘッド。(2) The impact dot head according to claim 1, further comprising an electromagnetic coil that cancels magnetic poles at positions facing each magnetic pole of a permanent magnet provided in the operating section that drives the printing wire.