JPS60168663A - Wire dot head - Google Patents

Wire dot head

Info

Publication number
JPS60168663A
JPS60168663A JP2556384A JP2556384A JPS60168663A JP S60168663 A JPS60168663 A JP S60168663A JP 2556384 A JP2556384 A JP 2556384A JP 2556384 A JP2556384 A JP 2556384A JP S60168663 A JPS60168663 A JP S60168663A
Authority
JP
Japan
Prior art keywords
core
magnetic
wire
plunger
magnetic flux
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
Application number
JP2556384A
Other languages
Japanese (ja)
Inventor
Shigeki Mizuno
茂樹 水野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Epson Corp
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Epson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KK, Epson Corp filed Critical Seiko Epson Corp
Priority to JP2556384A priority Critical patent/JPS60168663A/en
Publication of JPS60168663A publication Critical patent/JPS60168663A/en
Pending legal-status Critical Current

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
    • B41J2/27—Actuators for print wires
    • B41J2/28—Actuators for print wires of spring charge type, i.e. with mechanical power under electro-magnetic control

Landscapes

  • Impact Printers (AREA)

Abstract

PURPOSE:To obtain the wire dot head of low power consumption, which is free of magnetic interference, by a method in which the first bypass magnetic part is provided close to a permanent magnet and also the second bypass magnetic part is provided close to a magnetic erasor coil. CONSTITUTION:Most of the magnetic flux of a coil 5 pass through a closed loop A returning to a core 2 through the core 2, a plunger 6, and the second bypass magnetic part 31. The remaining of the magnetic flux pass through a closed loop B returning to the core 2 through the core 2, the plunger 6, an upper yoke 4, the first bypass magnetic part 32, and a lower yoke 3. Even when the magnetic flux passes through the suction portion of the adjacent drive units, no interference takes place, and even when the number of concurrently opening wires is increased, the current value necessary for opening is constant, thereby reducing the amount of power to be consumed. Since the magnetic flux for increment of suction forces by the permanent magnet 1 between the core 2 and the plungsr 6 can pass through the closed loop C by the first magnetic part 32, there is not increment of suction forces after being built in and therefore, the releasing current of the plunger can be reduced.

Description

【発明の詳細な説明】 〔技術分野〕 本発明はドツトプリンタのワイヤドツトヘッドに関する
。更−に−詳しくは、板バネに蓄えた弾性エネルギーを
解放してワイヤを駆動するいわゆるスプリングチャージ
方式のワイヤドツトヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a wire dot head for a dot printer. More specifically, the present invention relates to a so-called spring-charged wire dot head that drives a wire by releasing elastic energy stored in a leaf spring.

〔従来技術〕[Prior art]

ドツトプリンタに於いて、印字速度を向上させるために
は、ワイヤドツトヘッドの応答周波数を上げると同時に
ワイヤドツトヘッドの低消費電力化をはかる必要がある
。゛スプリングチャージ方式は電磁石吸引方式と比較し
て応答性がすぐれているが、以下で詳しく説明するよう
に従来の構造においては、磁気干渉の問題により低消費
電力化が困難であった。In order to improve the printing speed of a dot printer, it is necessary to increase the response frequency of the wire dot head and at the same time reduce the power consumption of the wire dot head. The spring charge method has superior responsiveness compared to the electromagnetic attraction method, but as will be explained in detail below, in the conventional structure, it has been difficult to reduce power consumption due to the problem of magnetic interference.

第６図は従来のワイヤドツトヘッドを示したものである
。同図において、永久磁石１０１．コア１０２と上ヨー
ク１υ４．下ヨーク１０３から構成される磁路において
永久磁石１０１の発生する磁束によりプランジャ１０６
がコア１０２に吸引され板バネ１０７が変形する。コア
１０２に巻回したコイル１０５に前記磁束を打消す方向
に一定時間通電すると１ランジヤ１０６が解放され、そ
れと同時に板バネ１０７に固着されたレバー１０８が回
転運動しレバー１０８先端に固定されたワイヤ１０９を
突出させる。ワイヤ１０９はリボンを介して図示しない
記録紙に衝突する。電流を遮断するとプランジャ１０６
は再びコア１０２に吸引されワイヤ１０９も待機位置に
復帰する。FIG. 6 shows a conventional wire dot head. In the figure, permanent magnet 101. Core 102 and upper yoke 1υ4. The plunger 106 is caused by the magnetic flux generated by the permanent magnet 101 in the magnetic path composed of the lower yoke 103.
is attracted to the core 102, and the plate spring 107 is deformed. When the coil 105 wound around the core 102 is energized for a certain period of time in the direction of canceling the magnetic flux, the first langeer 106 is released, and at the same time, the lever 108 fixed to the leaf spring 107 rotates and the wire fixed to the tip of the lever 108 is rotated. Make 109 stick out. The wire 109 collides with recording paper (not shown) via the ribbon. When the current is interrupted, the plunger 106
is attracted to the core 102 again, and the wire 109 also returns to the standby position.

以上説明した動作をするワイヤ駆動ユニットを複数個円
周上に配置してワイヤドツトヘッドを構成している。こ
のような構成のスプリングチャージヘッド固有の問題と
して、隣接する磁気回路に磁束が回り込むという、いわ
ゆる磁気干渉の問題がある。この問題を解決するため、
ワイヤ駆動ユニットを磁気回路上各ワイヤ毎独立化する
という方法がとられているが、多ピンヘッドを構成する
場合寸法上の制約から駆動ユニット間距離を大きくとれ
ないため、磁気干渉の影響は完全に無くなっていない。A wire dot head is constructed by arranging a plurality of wire drive units that operate as described above on the circumference. A problem unique to a spring charge head having such a configuration is a so-called magnetic interference problem in which magnetic flux wraps around adjacent magnetic circuits. To solve this problem,
A method has been adopted in which the wire drive unit is made independent for each wire on the magnetic circuit, but when configuring a multi-pin head, the distance between the drive units cannot be kept large due to dimensional constraints, so the effects of magnetic interference are completely eliminated. It's not gone.

このため、同時解放ワイヤ数が増えるに従って、解放に
必要な電流値も大きくなり、ヘッドの消費電力が大とな
る欠点があった。また、独立のワイヤ駆動ユニットを用
いているため、駆動ユニット単独の時と、駆動ユニット
をヘッドに組込んだ時とでは、同方向に着磁された永久
磁石が隣接するため、単独の場合と組込んだ場合とでは
、漏れパーミアンスが変化し、単独の時に適当な吸引状
態に設定しても組込むと吸引力が増加してしまい、この
ため開放電流が大になってしまうという欠点もあった〇 〔目　的〕 本発明は上述の種々の欠点を改善すべく行なわれたもの
で、磁気干渉のない低消費電力ワイヤドツトヘッドを実
現することを目的とする。For this reason, as the number of simultaneously released wires increases, the current value required for release also increases, resulting in a drawback that the power consumption of the head increases. In addition, since an independent wire drive unit is used, permanent magnets magnetized in the same direction are adjacent to each other when the drive unit is used alone and when the drive unit is incorporated into the head. The leakage permeance changes when it is incorporated, and even if it is set to an appropriate suction state when used alone, when it is incorporated, the suction force increases, which also has the disadvantage of increasing the open current. 〇 [Eye] This invention has been performed to improve the various drawbacks described above, and aims to realize a low power consumption wire tsut head without magnetic interference.

〔実施例〕〔Example〕

第１図及び第２図に示す一実施例に基づいて本発明を説
明する。下ヨーク、ｒ！４に゛コア２を固着し、上ヨー
ク４との間に永久磁石１をはさみ込み、固定軸１２を用
いて固定する。板ばね７とレバー８はブテンジャー６に
よって一体にかしめられる。The present invention will be explained based on an embodiment shown in FIGS. 1 and 2. Lower yoke, r! The core 2 is fixed to the upper yoke 4, the permanent magnet 1 is inserted between the upper yoke 4, and the fixed shaft 12 is used to fix the core 2. The leaf spring 7 and lever 8 are swaged together by a buttenger 6.

レバー８は薄板からなり先端はワイヤ９を巻込む形成と
し、両者は抵抗溶接、ロー付等の手段で固定される。板
ばね７は固定軸１２によって締結され上目−り４と押え
板１０の間に固定される。押え板１０の一部１０ｃはレ
バー８の待機位置における度当りの機能も有しレバー８
との衝突面にはゴム材で形成されるストッパ１１が取り
つけられる。コア２に巻回されるコイル５の２つの電極
端子１５．１６はバネ性を有する。The lever 8 is made of a thin plate and has a tip wrapped around a wire 9, and the two are fixed by resistance welding, brazing, or the like. The leaf spring 7 is fastened by a fixed shaft 12 and fixed between the upper eyelet 4 and the presser plate 10. The part 10c of the presser plate 10 also has the function of perforating the lever 8 in the standby position.
A stopper 11 made of a rubber material is attached to the collision surface. The two electrode terminals 15 and 16 of the coil 5 wound around the core 2 have spring properties.

上述のワイヤ駆動ユニット３０は、単独に組立完成後ヘ
ッド本体に着脱可能である。ヘッド本体への組込みは、
ワイヤガイド１８〜２３を予め組込んだヘッドフレーム
１３に押え板１０の突起１０αを係合させる如く組込み
、このとき第３図に示すリング状の第１のバイパス磁性
部材３２が下ヨーク３．永久磁石１．上ヨーク４と接触
するようにヘッドフレーム１３とワイヤ駆動ユニット間
に組込まれている。次に、第３図に示す第２のバイパス
用磁性部材３１をコイル５の周囲を包み込む様にコイル
毎に組込み、配線基板１７の配線パターンと対応する駆
動端子１５．１６を弾性接触させて電気的に接続される
。ヘッドフレーム２６と駆動ユニット４０の間にはゴム
シート１４を介在させて、各駆動ユニット間の長さのば
らつきによる組立上の不具合をなくすとともに、騒音の
発生を防止する。更に裏蓋２５を組込み固定ばね２６に
よってヘッドフレーム１３に弾性的に固定することによ
りヘッドが組立てられる。The wire drive unit 30 described above can be individually attached to and detached from the head body after assembly is completed. Incorporation into the head body is
The wire guides 18 to 23 are assembled into the head frame 13 in which the wire guides 18 to 23 have been previously assembled so as to engage the projections 10α of the presser plate 10, and at this time, the ring-shaped first bypass magnetic member 32 shown in FIG. 3 is inserted into the lower yoke 3. Permanent magnet 1. It is installed between the head frame 13 and the wire drive unit so as to be in contact with the upper yoke 4. Next, the second bypass magnetic member 31 shown in FIG. 3 is assembled into each coil so as to wrap around the coil 5, and the drive terminals 15 and 16 corresponding to the wiring pattern of the wiring board 17 are brought into elastic contact to generate electricity. connected. A rubber sheet 14 is interposed between the head frame 26 and the drive unit 40 to eliminate assembly problems due to length variations between the drive units and to prevent noise generation. Furthermore, the head is assembled by assembling the back cover 25 and elastically fixing it to the head frame 13 with the fixing spring 26.

次に動！作を説明する。永久磁石１の発生する磁束によ
ってプランジャ６はコア２に吸着され゛へ板ばね７は偏
倚保持される。コイル５に永久磁石１の磁界を打消す方
向に一定時間通電するとプランジャ６が吸引状態から解
放され、レバー８力へ弓回転してワイヤ９が突出する。Next move! Explain the work. The plunger 6 is attracted to the core 2 by the magnetic flux generated by the permanent magnet 1, and the leaf spring 7 is held biased. When the coil 5 is energized for a certain period of time in a direction that cancels the magnetic field of the permanent magnet 1, the plunger 6 is released from the attracted state, the lever 8 rotates in an arch direction, and the wire 9 protrudes.

ワイヤ９は図、示していないインクリボンを介して記録
紙に衝突し、記録紙上にドツトを形成した後、プランジ
ャ６が再びコア２に吸着し、ワイヤ９も待期位置に復帰
する。The wire 9 collides with the recording paper via an ink ribbon (not shown) and forms a dot on the recording paper, after which the plunger 6 attracts the core 2 again and the wire 9 also returns to the waiting position.

本実施列におけるバイパス磁性部材３１．３２の働きを
第４図を用いて説明する。コイル５に通電することによ
り発生する磁束の大部分は＃！４図に示す閉ループＡ１
つまりコア２．プランジャ６＊　ｔｇ　２のバイパス用
磁性部材３１を通ってコア２に戻るループを通り、残り
の磁束は閉ループＢ１つまりコア２．プランジャ６、上
ヨーク４．第１のバイパス用磁性部材３２．下ヨーク６
を通ってコア２に戻るループを通るため、隣接する駆動
ユニットの吸引部を磁束が通って干渉を起こすことがな
く、磁気干渉は発生しない。このため、同時開放ワイヤ
数が増しても、開放するのに必要な電流値は一炬で良く
、ワイヤドツトヘッドの低消費電力化が実現できる。ま
た、第１のバイパス磁性部材３２により、ワイヤ駆動ユ
ニットをヘッドに組込んだときのコア、プランジャ間で
の永久磁石による吸引力増加分の磁束は第４Ｆ４に示す
閉ループＱ、つまり永久磁石１．上ヨーク４．第１のバ
イパス珀磁性部材３２．下ヨーク６を通るので、コア２
．プランジャ６間の吸引力は変化しない。The function of the bypass magnetic members 31 and 32 in this embodiment will be explained using FIG. 4. Most of the magnetic flux generated by energizing the coil 5 is #! Closed loop A1 shown in Figure 4
In other words, core 2. The remaining magnetic flux passes through the bypass magnetic member 31 of the plunger 6*tg2 and returns to the core 2, and the remaining magnetic flux flows into the closed loop B1, that is, the core 2. Plunger 6, upper yoke 4. First bypass magnetic member 32. lower yoke 6
Since the magnetic flux passes through the loop and returns to the core 2, the magnetic flux does not pass through the attracting portions of adjacent drive units and cause interference, so no magnetic interference occurs. Therefore, even if the number of wires that are simultaneously opened increases, only one current is required to open the wires, and the power consumption of the wire dot head can be reduced. Furthermore, when the wire drive unit is assembled into the head, the first bypass magnetic member 32 allows the magnetic flux corresponding to the increase in the attraction force between the core and the plunger due to the permanent magnet to be transferred to the closed loop Q shown in 4F4, that is, the permanent magnet 1. Upper yoke 4. First bypass magnetic member 32. Since it passes through the lower yoke 6, the core 2
．． The suction force between the plungers 6 does not change.

このため、組込後の吸ｙ１１力増加がないので、プラン
ジャ解放電流を小にでき、低消費電力化が計れる。Therefore, since there is no increase in the suction force after assembly, the plunger release current can be reduced, and power consumption can be reduced.

本実施例では、レバーを用いてワイヤを駆動するヘッド
について説明してきたが、レバーを用いないタイプのヘ
ッドの場合でも同様の効果を有する第２の実施列につい
て、第５図を用いて説明する。第５図において、第２の
バイパス用磁性部材３１をリング状の形状として、各駆
動ユニットに共通としたのみで、他は前記実施列と全く
同じ構成である。従って前記実施列と同じ効果が得られ
る他に、第２のバイパス磁性部材３１が共通となったた
め作業性が向上し、第２のバイパス磁性部材３１のコス
トダウンにもつながる効果を有する〔効　果〕 以上述べてきたように本発明によれば、第１と第２のバ
イパス磁性部材を永久線石部とコイル部とに設けること
により、磁気干渉が無くなり低消費電力ヘッドが実現で
きる。また、ワイヤ駆動ユ＝ｙ）単独の状態で適正吸引
状態に設定しても、組込後吸引状態が変化しないため解
放電流が小にでき、その効果は大である。In this embodiment, a head that uses a lever to drive the wire has been described, but a second embodiment that has the same effect even in the case of a head that does not use a lever will be described using FIG. 5. . In FIG. 5, the second bypass magnetic member 31 is shaped like a ring, which is common to each drive unit, and the other configuration is exactly the same as that of the above embodiment. Therefore, in addition to obtaining the same effects as the above-described embodiment, since the second bypass magnetic member 31 is common, work efficiency is improved, and there is an effect that leads to cost reduction of the second bypass magnetic member 31. As described above, according to the present invention, by providing the first and second bypass magnetic members in the permanent wire portion and the coil portion, magnetic interference is eliminated and a low power consumption head can be realized. Further, even if the wire drive unit (y) is set to the proper suction state in the state of being alone, the suction state does not change after installation, so the release current can be made small, and the effect is great.

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

第１図は本発明の一実施例を示すワイヤドツトヘッドの
断面図、第２図は同じく駆動ユニットの分解図、第３図
は本発明の第１と第２のバイパス磁性部材と駆動ユニッ
トの位置関係を示す分解図、第４図は磁束の通路を示し
た駆動ユニットの断面図、嬉５図は本発明の一実施例を
示す第２のバイパス磁性部材と駆動ユニットの位置関係
を示す分解図、第６図は従来例を示すワイヤドツトヘッ
ドの断面図である。 １・・・・・・・・・永久磁石 ２・・・・・・用コ　ア ３・・・・・・・・・下ヨーク ４・・・・・・・・・上ヨーク ５・・・・・・・・・コイル ６・・・・・・・・・プランジャ ７・・・・・・・・・板けね ８　・・・　・・・　・・・　し　ノ（＝９・・・・・
・・・・ワイヤ １０・・・・・・押え板 １１・・・・軸ストッパ １２・・・・・・固定軸 ５１−・・・・・第２のバイパス磁性部材５２・・・・
・・！ｌＩ！１（７３バイパス磁性部材以・上 出願人　エプソン株式会社 株式会社諏訪精工舎 代理人　弁理士　最上　務 第３図 σ 第５図FIG. 1 is a sectional view of a wire dot head showing an embodiment of the present invention, FIG. 2 is an exploded view of the drive unit, and FIG. 3 is a diagram showing the first and second bypass magnetic members and drive unit of the present invention. Figure 4 is an exploded view showing the positional relationship, Figure 4 is a sectional view of the drive unit showing the path of magnetic flux, and Figure 5 is an exploded view showing the positional relationship between the second bypass magnetic member and the drive unit showing an embodiment of the present invention. 6 are sectional views of a conventional wire dot head. 1... Core for permanent magnet 2... Core 3... Lower yoke 4... Upper yoke 5...・・・・・・Coil 6・・・・・・・・・Plunger 7・・・・・・Plate lock 8 ・・・・・・・・・Shino(=9・・・・・・・
...Wire 10 ... Pressing plate 11 ... Shaft stopper 12 ... Fixed shaft 51 ... Second bypass magnetic member 52 ...
...! lI! 1 (73 bypass magnetic members and above) Applicant Epson Corporation Suwa Seikosha Co., Ltd. Representative Patent Attorney Tsutomu Mogami Figure 3 σ Figure 5

Claims (1)

【特許請求の範囲】[Claims] 板バネに固着されたプランジャと、該プランジャを吸着
し前妃板ばねを偏倚させる永久磁石と、該永久磁石の磁
束を打消して前記吸着状態を解放する消磁コイルと、前
記板バネにより駆動されるワイヤとからなるワイヤ駆動
ユニットを複数個配置したワイヤドツトヘッドにおいて
、前記永久磁石に近接して第１のバイパス用磁性部材と
、前記消磁コイルに近接して第２のバイパス用磁性部材
を設けたことを特徴とするワイヤドツトヘッド。A plunger fixed to a leaf spring, a permanent magnet that attracts the plunger and biases the front leaf spring, a degaussing coil that cancels the magnetic flux of the permanent magnet and releases the attracted state, and a degaussing coil that is driven by the leaf spring. In a wire dot head in which a plurality of wire drive units each consisting of a wire are arranged, a first bypass magnetic member is provided adjacent to the permanent magnet, and a second bypass magnetic member is provided adjacent to the degaussing coil. A wire dot head characterized by:
JP2556384A 1984-02-14 1984-02-14 Wire dot head Pending JPS60168663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2556384A JPS60168663A (en) 1984-02-14 1984-02-14 Wire dot head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2556384A JPS60168663A (en) 1984-02-14 1984-02-14 Wire dot head

Publications (1)

Publication Number Publication Date
JPS60168663A true JPS60168663A (en) 1985-09-02

Family

ID=12169399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2556384A Pending JPS60168663A (en) 1984-02-14 1984-02-14 Wire dot head

Country Status (1)

Country Link
JP (1) JPS60168663A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359133A2 (en) * 1988-09-13 1990-03-21 Seiko Epson Corporation Impact dot printer
US4921364A (en) * 1985-09-10 1990-05-01 Citizen Watch Co., Ltd. Dot matrix print head having easily removable magnets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921364A (en) * 1985-09-10 1990-05-01 Citizen Watch Co., Ltd. Dot matrix print head having easily removable magnets
EP0359133A2 (en) * 1988-09-13 1990-03-21 Seiko Epson Corporation Impact dot printer

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