JPS5892571A - Wire printing head - Google Patents
Wire printing headInfo
- Publication number
- JPS5892571A JPS5892571A JP19057081A JP19057081A JPS5892571A JP S5892571 A JPS5892571 A JP S5892571A JP 19057081 A JP19057081 A JP 19057081A JP 19057081 A JP19057081 A JP 19057081A JP S5892571 A JPS5892571 A JP S5892571A
- Authority
- JP
- Japan
- Prior art keywords
- armature
- yoke
- core
- magnetic flux
- permanent magnet
- 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
- B41J2/27—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
Description
【発明の詳細な説明】 本発明はバネチャージ型のワイヤ印字ヘッドに関する。[Detailed description of the invention] The present invention relates to a spring-charged wire printhead.
従来のバネチャージ型のワイヤ印字ヘッドの１例を第１
図によシ説明する。図において１は後部ヨーク、２は該
後部ヨーク１と一体に形成されたコ、ア、３は該コア２
の外周に設けられたコイルで、この・コア２とコイルと
で電磁石が形成されている。An example of a conventional spring-charged wire print head is shown below.
This will be explained with the help of a diagram. In the figure, 1 is the rear yoke, 2 is a core formed integrally with the rear yoke 1, A, and 3 are the core 2.
The core 2 and the coil form an electromagnet.
４は後部ヨーク１上に設けられた永久磁石、５は該永久
磁石４上に固定された側部ヨーク、６は前部ヨーク、７
はアーマチュア、８は該アーマチュア７を先部に保持し
た板バネ、９はアーマチュア７の先部に取付けられた印
字ワイヤで、これら１〜９は１組の印字機構を構成して
いる。１０は前記印字機構を複数組保持した非磁性体製
のフレーム、１１は複数組の印字機構を一括して覆う非
磁性体製のカバー、１２は該カバー１１の中央部に設け
られたワイヤガイドであり、ここで各板バネ８の基部は
側部ヨーク５と前部ヨーク６との間に挾持され、また側
部ヨーク５と前部ヨーク６とカバー１１はネジによシ一
体に固定されている。4 is a permanent magnet provided on the rear yoke 1, 5 is a side yoke fixed on the permanent magnet 4, 6 is a front yoke, and 7 is a permanent magnet provided on the rear yoke 1;
8 is an armature, 8 is a leaf spring holding the armature 7 at its tip, and 9 is a printing wire attached to the tip of the armature 7. These 1 to 9 constitute a set of printing mechanism. 10 is a frame made of a non-magnetic material that holds a plurality of sets of printing mechanisms; 11 is a cover made of a non-magnetic material that collectively covers the plurality of sets of printing mechanisms; 12 is a wire guide provided in the center of the cover 11; Here, the base of each leaf spring 8 is held between the side yoke 5 and the front yoke 6, and the side yoke 5, the front yoke 6, and the cover 11 are integrally fixed with screws. ing.
この構成において、永久磁石４の磁束は、側部ヨーク５
、前部ヨーク６、アーマチュア７、コア２、後部ヨーク
６の頴に通るループを形成し、またこの磁束を打消す電
磁石のコイル３の磁束はコア２、アーマチュア７、前部
ヨーク６、側部ヨーク５、電磁石４、後部ヨーク１を順
に通るループを形成する構造となっている。In this configuration, the magnetic flux of the permanent magnet 4 is transferred to the side yoke 5.
, the front yoke 6, armature 7, core 2, forming a loop passing through the rear yoke 6, and canceling this magnetic flux. It has a structure in which a loop is formed that passes through the yoke 5, the electromagnet 4, and the rear yoke 1 in this order.
そして、通常は永久磁石４の磁束によシ、アーマチュア
７がコア２に吸引されていて、板バネ８が偏倚しておシ
、印字時に電磁石のコイル３に通電すると、該コイル３
の磁束により前記永久磁石４の磁束が打消され、これに
よりアーマチュア７が解放されるため、板バネ８の復旧
力により印字ワイヤ９先端がワイヤガイド１２から突出
して印字が行われる。Normally, the armature 7 is attracted to the core 2 by the magnetic flux of the permanent magnet 4, and the leaf spring 8 is biased.When the coil 3 of the electromagnet is energized during printing, the coil 3
The magnetic flux of the permanent magnet 4 is canceled by the magnetic flux of the permanent magnet 4, and the armature 7 is thereby released, so that the tip of the printing wire 9 protrudes from the wire guide 12 due to the restoring force of the leaf spring 8, and printing is performed.
以上説明したワイヤ印字ヘッドは、上述した如くコイル
３の磁束が永久磁石４を通るループを形成するが、周知
のように永久磁石４の磁気抵抗は高く、そのためコイル
３の磁束の一部はコア２からアーマチュア４を通って隣
接する印字機構のコア２に流れてしまい、その結果磁気
干渉が生じてヘッドの特性及び発熱に悪影響を与えると
いう欠点が・あった。In the wire print head described above, the magnetic flux of the coil 3 forms a loop passing through the permanent magnet 4 as described above, but as is well known, the magnetic resistance of the permanent magnet 4 is high, so a part of the magnetic flux of the coil 3 is transferred to the core. 2, passes through the armature 4 and flows into the core 2 of the adjacent printing mechanism, resulting in magnetic interference, which has a disadvantage in that it adversely affects head characteristics and heat generation.
そこで、このような欠点を補うものとして第２図〜第４
図に示すワイヤ印字ヘッドが考えられ、ている０このワ
イヤ印字ヘッドは、永久磁石によるアーマチュア吸引の
ための磁気回路と、コイルの磁束によって永久磁石の磁
束を打消すための磁気回路を別々に構成して磁気干渉を
防止しようとするもので、後部ヨーク１３と、該後部ヨ
ーク１３と一体に形成されたコア１４及び側部ヨーク１
５と、コア１４の外周に設けられたコイル１６と、前記
後部ヨーク１３に隣接して配置された永久磁石１７と、
前部ヨーク１８と、アーマチュア１９と、該アーマチュ
ア１９を先部に保持した板バネ・２０と、アーマチュア
１９の先部に取付けられた印字ワイヤ２１と、これら１
３〜２１によシ構成される印字機構を複数組保持したフ
レーム２２と、カバー２３と、該カバー２３の中央部に
設けられたワイヤガイド２４とで構成されており、ここ
で各版バネ２０の基部はフレーム２２と前部ヨーク１８
との間に挾持され、またフレーム２２と前部ヨーク１８
とカバー２３はネジにより一体に固定されている。Therefore, as a way to compensate for these shortcomings, Figures 2 to 4 are shown.
The wire print head shown in the figure is considered, and this wire print head has two separate magnetic circuits: a magnetic circuit for armature attraction by a permanent magnet, and a magnetic circuit for canceling the magnetic flux of the permanent magnet by the magnetic flux of the coil. The rear yoke 13, the core 14 formed integrally with the rear yoke 13, and the side yokes 1 are designed to prevent magnetic interference.
5, a coil 16 provided on the outer periphery of the core 14, and a permanent magnet 17 arranged adjacent to the rear yoke 13,
The front yoke 18, the armature 19, the leaf spring 20 holding the armature 19 at the tip, the printing wire 21 attached to the tip of the armature 19, and these 1
It is composed of a frame 22 holding a plurality of sets of printing mechanisms configured by 3 to 21, a cover 23, and a wire guide 24 provided at the center of the cover 23. The base of the frame 22 and the front yoke 18
is sandwiched between the frame 22 and the front yoke 18.
and cover 23 are fixed together with screws.
この構成では、永久磁石１Ｔの磁束が第４図に示すよう
に、後部ヨーク１３、コア１４、アーマチュア１９、前
部ヨーク１８を通電、隣接する印字機構のアーマチュア
１９、コア１４、後部ヨーク１３を順に通るループａを
形成し、これによりアーマチュア１９をコア１４に吸引
して、該アーマチュア１９を先部に保持している板バネ
２０を偏倚させる。そしてコイル１６に通電するとコア
１４からの磁束はアーマチュア１９、側部ヨーク１５、
後部ヨーク１３を順に通るループｂを形成、シ、これに
よシアーマチュア１９がコア１４から解放され、板バネ
２０の復旧力により印字ワイヤ２１つ先端がワイヤガイ
ド２３から突出して印字が行われる。In this configuration, as shown in FIG. 4, the magnetic flux of the permanent magnet 1T energizes the rear yoke 13, core 14, armature 19, and front yoke 18, and energizes the armature 19, core 14, and rear yoke 13 of the adjacent printing mechanism. A loop a is formed through which the armature 19 is drawn into the core 14 and biases the leaf spring 20 holding the armature 19 at its tip. When the coil 16 is energized, the magnetic flux from the core 14 is transferred to the armature 19, side yoke 15,
A loop b passing sequentially through the rear yoke 13 is formed, whereby the shear mature 19 is released from the core 14, and due to the restoring force of the leaf spring 20, the tips of the printing wires 21 protrude from the wire guide 23 to perform printing.
ところが上述したワイヤ印字ヘッドの場合、永久磁石１
７の磁束のループａが隣接する印字機構のアーマチュア
１９と関係しているため、成る１つのアーマチュア１９
をコア１４から解放したとき、これと隣接するアーマチ
ュア１９を通る磁束も減少して解放され易くなる０つま
シ永久磁石１７の磁束によるアーマチュア１９の吸引力
が隣接する印字機構のコイル１６の駆動によって変化す
るわけで、このことは高速動作を行う上で非常に不安定
であり、これをコイル１６の磁束の調整によって避ける
ことは非常に困難である。However, in the case of the wire print head described above, the permanent magnet 1
Since the magnetic flux loop a of 7 is associated with the armature 19 of the adjacent printing mechanism, one armature 19 is formed.
When it is released from the core 14, the magnetic flux passing through the armature 19 adjacent to it also decreases and becomes easier to release.The magnetic flux of the permanent magnet 17 causes the attraction force of the armature 19 to be driven by the coil 16 of the adjacent printing mechanism. This is very unstable when performing high-speed operation, and it is very difficult to avoid this by adjusting the magnetic flux of the coil 16.
本発明は上述した磁気回路の長所を生かしつつ゛、欠点
を補ってより磁気干渉の小さい構造とすることを目的と
し、そのため隣接する印字機構間に補−助ヨークを設け
たことを特徴とする。The present invention is aimed at making use of the advantages of the magnetic circuit described above while compensating for the disadvantages and creating a structure with less magnetic interference, and is therefore characterized by providing an auxiliary yoke between adjacent printing mechanisms.
以下本発明の一実施例を第５図〜第７図により説明する
と、図において２４は後部ヨーク、２５は該後部ヨーク
２４の一端に°位置するコア、２６は後部ヨーク２４の
他端に位置する側部ヨークで、゛これらは一体に形成さ
れているｏ２７はコア２５の外周に設けられたコイルで
、このコア２５とコイル２７によシミ磁石が形成されて
いる。２８は後部ヨーク２４を挾むように設けられた永
久磁石、２９はコア２５と対向するように設けられた、
アーマチュア、３０は該アーマチュア２９を先部に保持
した板バネ、３１はアーマチュア２９の先部に取付けら
れた印字ワイヤ、３２は前部ヨークで、これら２４〜３
２は１組の印字機構を構成しているｏ３３は前記印字機
構を複数組保持するフレーム、３４は各印字機構間に配
置された本発明による補助ヨーク、３５は複数組の印字
機構を一括して覆うカバー、３６は該、カバー３５の中
央部に設けられたワイヤガイドであシ、ここで各板バネ
３０の基部はフレーム３３と前部ヨーク３２との間に挾
持され、またフレーム３３と前部ヨーク３２とカバー３
５はネジにより一体に固定されている。An embodiment of the present invention will be described below with reference to FIGS. 5 to 7. In the figures, 24 is a rear yoke, 25 is a core located at one end of the rear yoke 24, and 26 is located at the other end of the rear yoke 24. In the side yoke, these are integrally formed.O27 is a coil provided on the outer periphery of the core 25, and the core 25 and coil 27 form a stain magnet. 28 is a permanent magnet provided to sandwich the rear yoke 24; 29 is provided to face the core 25;
An armature, 30 is a leaf spring that holds the armature 29 at its tip, 31 is a printing wire attached to the tip of the armature 29, and 32 is a front yoke.
2 constitutes one set of printing mechanisms; o33 is a frame that holds a plurality of sets of the above-mentioned printing mechanisms; 34 is an auxiliary yoke according to the present invention disposed between each printing mechanism; 35 is a frame that collectively holds a plurality of sets of printing mechanisms; The cover 36 is a wire guide provided in the center of the cover 35, in which the base of each leaf spring 30 is held between the frame 33 and the front yoke 32, and the base of each leaf spring 30 is sandwiched between the frame 33 and the front yoke 32. Front yoke 32 and cover 3
5 are fixed together with screws.
なお、前記フレーム３３及びカバー３５はアルξ等の非
磁性体によって形成されており、また永久磁石２８は隣
接する補助ヨーク３４との間に磁極を交互に異ならせて
配置しである０
次に上述した構成の動作を説明する。まず通常時は、永
久磁石２８の磁束が第７図に示すように後部ヨーク２４
、コア２５、アーマチュア２９、前部ヨーク３２、補助
ヨーク３４を直列に通るループａを形成し、これにより
アーマチュア２９はコア２５に吸引され、該アーマチュ
ア２９を支持している板バネ３０が偏倚する。The frame 33 and the cover 35 are made of a non-magnetic material such as aluminum, and the permanent magnet 28 is arranged between adjacent auxiliary yokes 34 with magnetic poles alternately different. The operation of the above configuration will be explained. First, under normal conditions, the magnetic flux of the permanent magnet 28 is directed to the rear yoke 24 as shown in FIG.
, forming a loop a that passes in series through the core 25, armature 29, front yoke 32, and auxiliary yoke 34, whereby the armature 29 is attracted to the core 25, and the leaf spring 30 supporting the armature 29 is biased. .
そして印字時には、電磁石のコイル２７に通電すると、
それによって発生する磁束がコア２５、後部ヨーク２４
、側部ヨーク２６、アーマチュア３２ ｆｃ［ＩＩＫ通
るループｂを形成して前記永久磁石の磁束を打消し、こ
れによりアーマチュア２９がコア２５から解放されるた
め、板バネ３０の復旧力により印字ワイヤ３１がワイヤ
ガイド３６から突出して記録が行われる０
本実施例では第７図に示すように、各印字機構の永久磁
石２８から発生する磁束のループａは、隣接する印字機
構のアーマチュア２日を通ることがなく、各々補助ヨー
ク３４によって独立したループを保てるため、ある印字
機構のコア２５の磁束が変化しても常に一定の磁束を保
つことができる。When printing, when the electromagnetic coil 27 is energized,
The magnetic flux generated by this is transmitted to the core 25 and the rear yoke 24.
, the side yoke 26, and the armature 32 fc[IIK form a loop b passing through it to cancel the magnetic flux of the permanent magnet, thereby releasing the armature 29 from the core 25, so that the printing wire 31 is released by the restoring force of the leaf spring 30. In this embodiment, as shown in FIG. 7, the loop a of the magnetic flux generated from the permanent magnet 28 of each printing mechanism passes through the armature 2 of the adjacent printing mechanism. Since independent loops can be maintained by each auxiliary yoke 34, a constant magnetic flux can always be maintained even if the magnetic flux of the core 25 of a certain printing mechanism changes.
なお、本発明において、各印字機構のコア２５を通る磁
束の方向はすべて同方向であり、従って印字ワイヤ３１
の数が奇数、偶数に拘わらず使用でき、かつコイル２７
の巻方向または通電方向をすべて同じにすることができ
る。Note that in the present invention, the directions of magnetic flux passing through the core 25 of each printing mechanism are all the same, so that the printing wire 31
It can be used regardless of whether the number of coils 27 is odd or even.
The winding direction or current direction can all be the same.
また、本発明は上述した実施例に限られるものではなく
、例えば永久磁石２８はコア２５と補助ヨーク３４との
間にのみ設け、側部ヨーク２６と補助ヨーク３４の間に
は設けないようにしてもよく、またコア２５の上下のい
ずれの側に設けてもよい。Furthermore, the present invention is not limited to the above-described embodiments; for example, the permanent magnet 28 may be provided only between the core 25 and the auxiliary yoke 34, and not between the side yoke 26 and the auxiliary yoke 34. Alternatively, it may be provided on either the upper or lower side of the core 25.
以上説明したように本発明は、印字機構相互間に補助ヨ
ークを配置して、各印字機構における永久磁石の磁束の
ループを独立させているため、アーマチュアが隣接する
印字機構のコアの磁束ρ影響を受けることがなくなり、
従って安定した高速動作を実現できると共に、磁気干渉
を完全になくすことができるという効果がある０As explained above, in the present invention, the auxiliary yoke is arranged between the printing mechanisms to make the magnetic flux loop of the permanent magnet in each printing mechanism independent, so that the armature is influenced by the magnetic flux ρ of the core of the adjacent printing mechanism. You will no longer receive
Therefore, it is possible to achieve stable high-speed operation and to completely eliminate magnetic interference.
第１図は従来例を示す側断面図、第２図は他の従来例を
示す側断面図、第３図は第２図のＡ−Ａ線断面図、第４
図は第２図及び第３図の従来例におｉ迅磁束のループを
示す説明図、第５図は本発明の一実施例を示す側断面図
、第６図は第５図のＡ−Ａ線断面図、第７図は第５図及
び第６図の実施例における磁束のループを示す説明図で
ある。
２４・・・後部ヨーク ２５・・・コア ２６・・・側
部ヨーク ２７・・・コイル ２８・・・永久磁石 ２
９・・・アーマチュア ３０・・・板バネ ３１・・・
印字ワイヤ３２・・・前部ヨーク ３４・・・補助ヨー
ク特 許 出 願 人 沖電気工業株式会社代理人
弁理士 金 倉 喬 二−１１
４５
１ｍＺＣｉｉｌ 角３［ｍ
脅４１FIG. 1 is a side sectional view showing a conventional example, FIG. 2 is a side sectional view showing another conventional example, FIG. 3 is a sectional view taken along line A-A in FIG.
The figure is an explanatory diagram showing a loop of i-fast magnetic flux in the conventional example of FIGS. 2 and 3, FIG. 5 is a side sectional view showing an embodiment of the present invention, and FIG. 6 is an A-- The sectional view taken along line A and FIG. 7 are explanatory diagrams showing the loops of magnetic flux in the embodiments of FIGS. 5 and 6. 24... Rear yoke 25... Core 26... Side yoke 27... Coil 28... Permanent magnet 2
9... Armature 30... Leaf spring 31...
Printing wire 32...Front yoke 34...Auxiliary yoke Patent Applicant: Agent for Oki Electric Industry Co., Ltd.
Patent Attorney Takashi Kanakura 2-11 45 1mZCiil Kaku 3 [m Threat 41
Claims (1)
と、該後部ヨークの他端に位置する側部ヨークと、前記
コアの外周に設けられたコイルと、前記コアに隣接して
設けられた永久磁石と、前記コアと対向するように設け
られたアーマチュアと、該アーマチュアを先部に保持し
た板バネと、該アーマチュアに取付けられ・た印字ワイ
ヤとを備えた印字機構を複数組方するバネチャージ型の
印字ヘッドにおいて、隣接する印字機構間に補助ヨーク
を配置し、各印字機構の永久磁石の磁束がコアとアーマ
チュアと補助ヨークを直列に通るループを形成すると共
に、この永久磁石の磁束を打消すコイルの磁束がコアと
後部ヨークと側部ヨークとアーマチュアを直列に通るル
ープを形成することを特徴とするワイヤ印字ヘッド。1. A rear yoke, a core located at one end of the rear yoke, a side yoke located at the other end of the rear yoke, a coil provided on the outer periphery of the core, and a coil provided adjacent to the core. A plurality of printing mechanisms are assembled, each of which includes a permanent magnet, an armature provided to face the core, a leaf spring holding the armature at its tip, and a printing wire attached to the armature. In a spring-charged print head, an auxiliary yoke is arranged between adjacent printing mechanisms, and the magnetic flux of the permanent magnet of each printing mechanism forms a loop passing through the core, armature, and auxiliary yoke in series, and the magnetic flux of this permanent magnet A wire printhead characterized in that the magnetic flux of the coil cancels out forming a loop passing in series through the core, rear yoke, side yokes and armature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19057081A JPS5892571A (en) | 1981-11-30 | 1981-11-30 | Wire printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19057081A JPS5892571A (en) | 1981-11-30 | 1981-11-30 | Wire printing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5892571A true JPS5892571A (en) | 1983-06-01 |
Family
ID=16260258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19057081A Pending JPS5892571A (en) | 1981-11-30 | 1981-11-30 | Wire printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5892571A (en) |
-
1981
- 1981-11-30 JP JP19057081A patent/JPS5892571A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0235669B2 (en) | ||
| US4583871A (en) | Dot printer head with magnetic circuit through adjacent armatures | |
| JPS5892571A (en) | Wire printing head | |
| JPS5649279A (en) | Releasing type printer head | |
| EP0041126B1 (en) | Mosaic printing head with cross-talk prevention means | |
| EP0411148B1 (en) | Wire dot printing head | |
| EP0117145A1 (en) | Dot impact printing head | |
| JPS5836469A (en) | Dot printer head | |
| GB2134450A (en) | Head for impact type of dot line printer | |
| JPS6040991B2 (en) | wire dot head | |
| US4798488A (en) | Dot matrix print head | |
| JPH0716438Y2 (en) | Wire dot print head | |
| JPS5845067A (en) | Spring charge type print head | |
| EP0269959B1 (en) | Wire-type printing head | |
| JPS6241049A (en) | High-speed printing head | |
| JPS6268764A (en) | Printing head | |
| JPS62249759A (en) | Printing head for line printer | |
| JPS6134135Y2 (en) | ||
| JPH078199Y2 (en) | Wire print head | |
| JPH0719796Y2 (en) | Wire dot print head | |
| JPH039853A (en) | Printing head | |
| JPS62146647A (en) | Serial printer head | |
| JPS6354256A (en) | Dot printer head | |
| JPS625073B2 (en) | ||
| JPS5872473A (en) | Printer |