JPS625073B2 - - Google Patents
Info
- Publication number
- JPS625073B2 JPS625073B2 JP56083790A JP8379081A JPS625073B2 JP S625073 B2 JPS625073 B2 JP S625073B2 JP 56083790 A JP56083790 A JP 56083790A JP 8379081 A JP8379081 A JP 8379081A JP S625073 B2 JPS625073 B2 JP S625073B2
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic coil
- magnetic flux
- magnetic
- permanent magnet
- shunt
- 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.)
- Expired
Links
- 230000004907 flux Effects 0.000 claims description 35
- 230000002411 adverse Effects 0.000 description 2
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)
Description
【発明の詳細な説明】
本発明はばねチヤージ形のドツト印字ヘツドに
おいて、比較的に容易に、永久磁石の磁束を打消
すことができるドツト印字ヘツドに関するもので
ある。従来のばねチヤージ形のドツト印字ヘツド
は例えば特願昭55―135793号に示すように、電磁
コイルを巻回したコア、永久磁束、アーマチユア
およびヨークを含む磁路構成であるため、永久磁
石による磁路と電磁コイルによる磁路とが同一で
あるため、電磁コイルからみた磁気回路の磁気抵
抗が大きく、永久磁束による磁束を打消すために
は電磁コイルに流す電流が大きくなる欠点があつ
た。また電磁コイルから見た磁気回路中に永久磁
石が存在するため永久磁石部の磁気抵抗が大き
く、電磁コイルの付勢による磁束が、上記磁気回
路外に漏れて、隣りの磁気回路に悪影響を及ぼす
磁気干渉が大きい欠点も合めせもつていた。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spring charge type dot printing head in which the magnetic flux of a permanent magnet can be canceled out relatively easily. As shown in Japanese Patent Application No. 55-135793, a conventional spring charge type dot printing head has a magnetic path configuration including a core wound with an electromagnetic coil, a permanent magnetic flux, an armature, and a yoke. Since the path and the magnetic path created by the electromagnetic coil are the same, the magnetic resistance of the magnetic circuit seen from the electromagnetic coil is large, and this has the disadvantage that a large current must be passed through the electromagnetic coil to cancel the magnetic flux caused by the permanent magnetic flux. In addition, since there is a permanent magnet in the magnetic circuit as seen from the electromagnetic coil, the magnetic resistance of the permanent magnet part is large, and the magnetic flux due to the energization of the electromagnetic coil leaks out of the magnetic circuit and adversely affects the adjacent magnetic circuit. It also had the disadvantage of large magnetic interference.
本発明は以上の欠点を除去するものであり、以
下実施例を用いて詳細に説明する。 The present invention eliminates the above drawbacks, and will be explained in detail below using examples.
第１図ａおよび第１図ｂは本発明に係るドツト
印字ヘツドの一実施例を示す側面図および正面図
である。同図において、１はヨーク、２はこのヨ
ーク１の一端に固定した永久磁石、３は一端が永
久磁石２の他端に固定し、他端には第１分路４お
よび第２分路５をもつコア、６および７はこの第
１分路４および第２分路５にそれぞれ巻回した第
１電磁コイルおよび第２電磁コイル、８は一端が
固定された板ばね、９はこの板ばね８の他端に装
着したアーマチユア、１０はこのアーマチユア９
の一端に装着した印字ワイヤである。 FIGS. 1a and 1b are a side view and a front view of an embodiment of a dot printing head according to the present invention. In the figure, 1 is a yoke, 2 is a permanent magnet fixed to one end of this yoke 1, 3 is fixed to the other end of the permanent magnet 2, and the other end has a first shunt 4 and a second shunt 5. 6 and 7 are first and second electromagnetic coils wound around the first shunt 4 and second shunt 5, respectively; 8 is a leaf spring having one end fixed; 9 is this leaf spring; The armature attached to the other end of 8, 10 is this armature 9
This is a printing wire attached to one end of the .
なお、永久磁石２の磁束が通る第１磁路は永久
磁石２＜コア３の第１分路４コア３の第２分路５
＞アーマチユア９―ヨーク１―永久磁石２であ
り、その通過する磁束を一点鎖線１１で示す。第
１電磁コイル６の磁束が通る磁路はコア３の第１
分路４―コア３―永久磁石２―ヨーク１―アーマ
チユア９―第１分路４からなるＡ磁路と第１分路
４―第１副分路１２からなる第２磁路とから形成
され、その通過する磁束を点線１３で示す。第２
電磁コイル７の磁束が通る磁路はコア３の第２分
路５―コア３―永久磁石２―ヨーク１―アーマチ
ユア９―第２分路５からなるＢ磁路と第２分路５
―第２副分路１４からなる第３磁路とから形成さ
れ、その通過する磁束を点線１５で示す。 Note that the first magnetic path through which the magnetic flux of the permanent magnet 2 passes is permanent magnet 2 < first shunt of core 3 4 second shunt of core 3
> armature 9 - yoke 1 - permanent magnet 2, and the magnetic flux passing therethrough is shown by a dashed line 11. The magnetic path through which the magnetic flux of the first electromagnetic coil 6 passes is the first
It is formed of a magnetic path A consisting of shunt 4 - core 3 - permanent magnet 2 - yoke 1 - armature 9 - first shunt 4 and a second magnetic path consisting of first shunt 4 - first sub-shunt 12. , the magnetic flux passing through it is shown by a dotted line 13. Second
The magnetic path through which the magnetic flux of the electromagnetic coil 7 passes is a B magnetic path consisting of the second shunt 5 of the core 3 - the core 3 - the permanent magnet 2 - the yoke 1 - the armature 9 - the second shunt 5, and the second shunt 5.
- A third magnetic path consisting of a second sub-shunt 14, and the magnetic flux passing through it is shown by a dotted line 15.
次に、上記構成に係るドツト印字ヘツドの動作
について説明する。 Next, the operation of the dot printing head according to the above configuration will be explained.
まず、第１電磁コイル６および第２電磁コイル
７が通電されていない状態ではアーマチユア９は
永久磁石２の磁束が通る第１磁路により、ヨーク
１の一端に吸着される。したがつて、板ばね８は
撓んだ状態で保持される。 First, when the first electromagnetic coil 6 and the second electromagnetic coil 7 are not energized, the armature 9 is attracted to one end of the yoke 1 by the first magnetic path through which the magnetic flux of the permanent magnet 2 passes. Therefore, the leaf spring 8 is held in a bent state.
次に印字指令信号により、第１電磁コイル６お
よび第２電磁コイル７が付勢されると、第１磁路
および第２磁路を通る磁束によつて、前記第１磁
路の磁束が打消される。このため、アーマチユア
９は板ばね８の反力により、反時計方向に回動す
る。このため、印字ワイヤ１０によりドツトを印
字することができる。 Next, when the first electromagnetic coil 6 and the second electromagnetic coil 7 are energized by the print command signal, the magnetic flux in the first magnetic path is canceled by the magnetic flux passing through the first magnetic path and the second magnetic path. be done. Therefore, the armature 9 rotates counterclockwise due to the reaction force of the leaf spring 8. Therefore, dots can be printed using the printing wire 10.
なお、このとき、第１電磁コイル６および第２
電磁コイル７による磁束は第１磁路を通るが、そ
の量は非常に少ない。このため、電磁コイル側か
らみた磁気回路の磁気抵抗が小さくなり、比較的
容易に永久磁石の磁束をカツトすることができ
る。 Note that at this time, the first electromagnetic coil 6 and the second
Although the magnetic flux generated by the electromagnetic coil 7 passes through the first magnetic path, the amount thereof is very small. Therefore, the magnetic resistance of the magnetic circuit seen from the electromagnetic coil side is reduced, and the magnetic flux of the permanent magnet can be cut off relatively easily.
なお、以上は１個のアーマチユアを駆動する場
合について説明したが、複数個のアーマチユアを
駆動する場合にも同様にできることはもちろんで
ある。 Note that although the above description has been made regarding the case where one armature is driven, it goes without saying that the same can be done when driving a plurality of armatures.
第２図ａおよび第２図ｂは本発明に係るドツト
印字ヘツドの他の一実施例を示す側面図及び正面
図である。同図において２１はヨーク、２２はヨ
ーク２１の一端に固定した永久磁石、２３は一端
が永久磁石２２の他端に固定し、途中に副分路２
４をもつコア、２５は２３コアと２４副分路が閉
磁気回路となるように巻回された電磁コイル、２
６は一端が固定された板ばね、である。 2a and 2b are a side view and a front view showing another embodiment of the dot printing head according to the present invention. In the figure, 21 is a yoke, 22 is a permanent magnet fixed to one end of the yoke 21, and 23 is a permanent magnet with one end fixed to the other end of the permanent magnet 22, and a sub-shunt 2 in the middle.
4, 25 is an electromagnetic coil wound such that 23 cores and 24 sub-shunts form a closed magnetic circuit;
6 is a leaf spring with one end fixed.
なお永久磁石２２の磁束が通る第１磁路は永久
磁石２２―ヨーク２１―アーマチユア９＜コアの
一部２３副分路 ２４＞コアの一部２―永久磁石
２２でありその通過する磁束を一点鎖線２７で示
す。電磁コイル２５の磁束が通る磁路はコアの一
部２３―副分路２４―アの一部２３−ｂからなる
磁路にて、その通過する磁束を点線２８で示す。 Note that the first magnetic path through which the magnetic flux of the permanent magnet 22 passes is permanent magnet 22 - yoke 21 - armature 9 <part of core 23 sub-shunt 24> part of core 2 - permanent magnet 22, and the magnetic flux passing through it is connected to one point. It is shown by a chain line 27. The magnetic path through which the magnetic flux of the electromagnetic coil 25 passes is a magnetic path consisting of a portion of the core 23, a sub-shunt 24, and a portion 23-b of the sub-shunt 24, and the magnetic flux passing therethrough is indicated by a dotted line 28.
次に上記構成に係るドツト印字ヘツドの動作に
ついて説明する。 Next, the operation of the dot printing head according to the above configuration will be explained.
まず電磁コイル２５が通電されていない状態で
は、アーマチユア９は永久磁石２２の磁束が通る
第１磁路により、コア２３の一端に吸着される。
したがつて板ばね２６は撓んだ状態で保持され
る。 First, when the electromagnetic coil 25 is not energized, the armature 9 is attracted to one end of the core 23 by the first magnetic path through which the magnetic flux of the permanent magnet 22 passes.
Therefore, the leaf spring 26 is held in a bent state.
次に印字指令信号により電磁コイル２５が付勢
されると電磁コイル及び副分路を通る磁束によつ
て、前記第１磁路の磁束が打ち消される。すなわ
ち永久磁石からの磁束は、電磁コイル２５による
発生した磁路中を通過することになる。しかし、
電磁コイル２５による磁束は点線２８で示した閉
ループを通る磁気回路を形成し、同磁気回路中に
磁気飽和を発生することができる。この永久磁石
から見た磁気回路すなわち第１磁路中の途中に電
磁コイル２５による磁気飽和が発生しているた
め、永久磁石２２による磁束２７は電磁コイル２
５により発生した磁束２８に打ち消されかつ、さ
またげられて通過できなくなる。このためアーマ
チユア９は板ばねの反力により、反時計方向に回
動する。このため印字ワイヤ１０によりドツトを
印字することができる。 Next, when the electromagnetic coil 25 is energized by the print command signal, the magnetic flux in the first magnetic path is canceled by the magnetic flux passing through the electromagnetic coil and the sub-shunt. That is, the magnetic flux from the permanent magnet passes through the magnetic path generated by the electromagnetic coil 25. but,
The magnetic flux generated by the electromagnetic coil 25 forms a magnetic circuit passing through a closed loop indicated by a dotted line 28, and can generate magnetic saturation in the magnetic circuit. Since magnetic saturation occurs due to the electromagnetic coil 25 in the magnetic circuit viewed from the permanent magnet, that is, in the first magnetic path, the magnetic flux 27 due to the permanent magnet 22 is transferred to the electromagnetic coil 2.
It is canceled out by the magnetic flux 28 generated by the magnetic flux 5, and is obstructed so that it cannot pass through. Therefore, the armature 9 rotates counterclockwise due to the reaction force of the leaf spring. Therefore, dots can be printed using the printing wire 10.
なおこのとき電磁コイル２５に発生した磁束の
大部分はコアの一部２３―副分路２４―コアの一
部２３を通ることになる。このため電磁コイル側
から見た磁気回路の磁気抵抗が小さくなり比較的
容易に永久磁石の磁束をカツトすることができ
る。また電磁コイルからの磁束が上記磁気回路外
へ漏れて隣りの磁気回路への悪影響することが非
常に少くなる。 At this time, most of the magnetic flux generated in the electromagnetic coil 25 passes through part 23 of the core - sub-shunt 24 - part 23 of the core. Therefore, the magnetic resistance of the magnetic circuit as seen from the electromagnetic coil side becomes small, and the magnetic flux of the permanent magnet can be cut off relatively easily. Further, the magnetic flux from the electromagnetic coil leaks out of the magnetic circuit and adversely affects adjacent magnetic circuits, which is greatly reduced.
なお以上は１個のアーマチユアを駆動する場合
について説明したが、複数個のアーマチユアを駆
動する場合についても同様にできることはもちろ
んである。 In addition, although the case where one armature is driven has been described above, it goes without saying that the same can be done in the case where a plurality of armatures are driven.
以上、詳細に説明したように、本発明に係るド
ツト印字ヘツドによれば永久磁石による磁束を比
較的容易にカツトすることができるので、電磁コ
イルを付勢するための電力を小さくすることがで
きる効果がある。 As explained above in detail, according to the dot printing head according to the present invention, the magnetic flux caused by the permanent magnet can be cut relatively easily, so that the electric power required to energize the electromagnetic coil can be reduced. effective.
第１図ａおよび第１図ｂは本発明に係るドツト
印字ヘツドの一実施例を示す側面図および正面
図、第２図ａおよび第２図ｂは本発明に係るドツ
ト印字ヘツドの他の一実施例を示す側面図および
正面図である。
１……ヨーク、２……永久磁石、３……コア、
４……第１分路、５……第２分路、６……第１電
磁コイル、７……第２電磁コイル、８……板ば
ね、９……アーマチユア、１０……印字ワイヤ、
１１……一点鎖線、１２……第一副分路、１３…
…点線、１４……第２副分路、２１……ヨーク、
２２……永久磁石、２３……コア、２４……副分
路、２５……電磁コイル、２６……板ばね、２７
……一点鎖線、２８……点線。
1a and 1b are side and front views showing one embodiment of a dot printing head according to the present invention, and FIGS. 2a and 2b are views showing another embodiment of a dot printing head according to the present invention. FIG. 2 is a side view and a front view showing an example. 1... Yoke, 2... Permanent magnet, 3... Core,
4... First shunt, 5... Second shunt, 6... First electromagnetic coil, 7... Second electromagnetic coil, 8... Leaf spring, 9... Armature, 10... Printing wire,
11...dotted chain line, 12...first sub-branch, 13...
...Dotted line, 14...Second sub-branch, 21...Yoke,
22... Permanent magnet, 23... Core, 24... Sub-shunt, 25... Electromagnetic coil, 26... Leaf spring, 27
...dotted chain line, 28...dotted line.
Claims (1)
よつてドツトワイヤを支持する板ばねを撓ませて
おき、電磁コイルを駆動することにより永久磁石
の磁束を打ち消して、板ばねの反力によりドツト
ワイヤを突出させ、ドツト文字を印字するばねチ
ヤージ形のドツト印字ヘツドにおいて、コアと電
磁コイルとから成る電磁石の両極間に副分路を設
け、電磁石からの磁束のほとんどがエアギヤツプ
を通らずにこの副分路を通ることを特徴とするド
ツト印字ヘツド。1 When the electromagnetic coil is not driven, the leaf spring that supports the dot wire is bent by the magnetic flux of the permanent magnet, and by driving the electromagnetic coil, the magnetic flux of the permanent magnet is canceled out, and the dot wire is projected by the reaction force of the leaf spring. In a spring charge type dot printing head that prints dot characters, a sub-shunt is provided between the poles of an electromagnet consisting of a core and an electromagnetic coil, and most of the magnetic flux from the electromagnet is routed through this sub-shunt without passing through the air gap. A dot printing head characterized by passing through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8379081A JPS57199669A (en) | 1981-06-02 | 1981-06-02 | Dot printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8379081A JPS57199669A (en) | 1981-06-02 | 1981-06-02 | Dot printing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57199669A JPS57199669A (en) | 1982-12-07 |
| JPS625073B2 true JPS625073B2 (en) | 1987-02-03 |
Family
ID=13812435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8379081A Granted JPS57199669A (en) | 1981-06-02 | 1981-06-02 | Dot printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57199669A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG26413G (en) * | 1988-10-18 | 1995-09-01 | Seiko Epson Corp | A printing head for an impact dot printer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5563283A (en) * | 1978-11-06 | 1980-05-13 | Fujitsu Ltd | Wire dot printer |
| JPS568456B2 (en) * | 1973-09-04 | 1981-02-24 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS568456U (en) * | 1979-07-03 | 1981-01-24 |
-
1981
- 1981-06-02 JP JP8379081A patent/JPS57199669A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS568456B2 (en) * | 1973-09-04 | 1981-02-24 | ||
| JPS5563283A (en) * | 1978-11-06 | 1980-05-13 | Fujitsu Ltd | Wire dot printer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57199669A (en) | 1982-12-07 |
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