JPH0431061A - Impact head - Google Patents

Impact head

Info

Publication number
JPH0431061A
JPH0431061A JP13804490A JP13804490A JPH0431061A JP H0431061 A JPH0431061 A JP H0431061A JP 13804490 A JP13804490 A JP 13804490A JP 13804490 A JP13804490 A JP 13804490A JP H0431061 A JPH0431061 A JP H0431061A
Authority
JP
Japan
Prior art keywords
lever
core
yoke
impact head
sintering
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
JP13804490A
Other languages
Japanese (ja)
Inventor
Kiyobumi Koike
小池 清文
Minoru Tanaka
実 田中
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
Original Assignee
Seiko 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 filed Critical Seiko Epson Corp
Priority to JP13804490A priority Critical patent/JPH0431061A/en
Publication of JPH0431061A publication Critical patent/JPH0431061A/en
Pending legal-status Critical Current

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  • Impact Printers (AREA)

Abstract

PURPOSE:To make an impact head having high durability and high magnetic efficiency manufacturable at low cost by a method wherein a nonmagnetic layer is integrally formed by sintering to the surface of a core to which a lever is attracted, or a member having high abrasion resistance is integrally formed by sintering to the surface whereon sliding is applied. CONSTITUTION:Electric current is selectively applied to a driving coil 7 with printing data transmitted, and a magnetic flux is produced in a magnetic circuit formed of a core 1, a frame 2, a yoke 8, a side yoke 9, and a lever 10. Thereby the lever 10 is driven, giving impetus to a printing wire 12 that is engaged to one end of the lever 10, and thereby printing is made. As formation of a nonmagnetic layer 3, excellent in abrasion-resistivity, is made integrally to a drawing surface 1a of the core 1, the thickness and capacity of the nonmagnetic layer 3 become respectively uniform, and thereby the behavior of the lever 10 is stabilized, reducing abrasion that occurs when colliding with the cord. Thereby durability of the title device can be greatly improved.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明はインパクトヘッドに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an impact head.

[従来の技術] 従来のインパクトヘッドはコアのレバーを吸弓する面に
残留磁束の切れを良くする為に、ポリイミドシートの積
層あるいは、非磁性メツキ等を一般的に用いていた。
[Prior Art] Conventional impact heads generally use laminated polyimide sheets or non-magnetic plating on the surface of the core that absorbs the lever in order to improve the cutting of residual magnetic flux.

また摺動面には耐摩耗性を高める為に、メツキ等の表面
処理を一般的に用いていた。
Additionally, surface treatments such as plating were generally used on sliding surfaces to increase wear resistance.

[発明が解決しようとする課題] しかしながら、このようにコアのレバーを吸弓する面に
ポリイミドシートを積層した場合、各コア毎にポリイミ
ドシートを配設しなければならず位置ずれ等組立性が大
幅に悪くなるばかりでなく、ポリイミドシートとコアと
の間にエアーギャップを生じ、磁気効率を低下させる。
[Problems to be Solved by the Invention] However, when polyimide sheets are laminated on the surface of the core that absorbs the lever in this way, a polyimide sheet must be placed for each core, which causes assembly problems such as misalignment. Not only is it significantly worse, but it also creates an air gap between the polyimide sheet and the core, reducing magnetic efficiency.

また摺動面に耐摩耗性のメツキ等の表面処理をした場合
、摺動面を有する部材全体にメツキがされてしまい、摺
動面以外の磁気回路を構成する部分の磁気効率を低下さ
せる。また部材全体にメツキをすることによりコストア
ップしていた。
Furthermore, when the sliding surface is subjected to a surface treatment such as wear-resistant plating, the entire member having the sliding surface is plated, which reduces the magnetic efficiency of the parts constituting the magnetic circuit other than the sliding surface. Also, the cost was increased by plating the entire member.

そこで、本発明はかかる問題点に鑑みてなされたもので
、その目的とするところは、低コストで、磁気効率を低
下させることなく、非磁性層を形成でき、また低コスト
で、磁気効率を低下させることなく、摺動面のみに耐摩
耗性に優れる部材を形成し、耐久性能に優れるインパク
トヘッドを提供することにある。
The present invention has been made in view of these problems, and its purpose is to form a non-magnetic layer at low cost without reducing magnetic efficiency, and to improve magnetic efficiency at low cost. It is an object of the present invention to provide an impact head having excellent durability performance by forming a member having excellent wear resistance only on the sliding surface without degrading the wear resistance.

[課題を解決するための手段] 本発明のインパックヘッドは、印字ワイヤと、該印字ワ
イヤを駆動するレバーと、該レバーを磁気的に駆動する
駆動コイルと、前記レバーを磁気的に吸引するコアを有
するフレームにより構成されたインパクトヘッドにおい
て、前記コアの前記レバーを吸引する面に非磁性層を焼
結により一体的に形成化したことを特徴とする。
[Means for Solving the Problems] The in-pack head of the present invention includes a printing wire, a lever for driving the printing wire, a driving coil for magnetically driving the lever, and a magnetically attracting the lever. The impact head is constituted by a frame having a core, and is characterized in that a nonmagnetic layer is integrally formed by sintering on the surface of the core that attracts the lever.

また印字ワイヤと、該印字ワイヤを駆動するレバーと、
該レバーを磁気的に駆動する駆動コイルと、前記レバー
を磁気的に吸引するコアを有するフレームと、前記レバ
ーと協働して磁気回路の一部をなすと共に、前記レバー
をガイドするヨークにより構成されたインパクトヘッド
において、摺動面に耐摩耗性に優れる部材を焼結により
一体的に形成したことを特徴とする。
Also, a printing wire, a lever for driving the printing wire,
Consisting of a drive coil that magnetically drives the lever, a frame having a core that magnetically attracts the lever, and a yoke that cooperates with the lever to form part of a magnetic circuit and guide the lever. This impact head is characterized in that a member having excellent wear resistance is integrally formed on the sliding surface by sintering.

また印字ワイヤと、該印字ワイヤを駆動するレバーと、
該レバーを磁気的に駆動する駆動コイルと、前記レバー
を磁気的に吸引するコアを有するフレームと、前記レバ
ーの揺動支点をなす支点軸と、前記レバーと協働して磁
気回路の一部をなすと共に、前記支点軸をガイドするサ
イドヨークにより構成されたインパクトヘッドにおいて
、摺動面に耐摩耗性に優れる部材を焼結により一体的に
形成したことを特徴とする。
Also, a printing wire, a lever for driving the printing wire,
A frame having a drive coil that magnetically drives the lever, a core that magnetically attracts the lever, a fulcrum shaft that serves as a pivot point for the lever, and a part of a magnetic circuit that cooperates with the lever. The impact head is configured with a side yoke that guides the fulcrum shaft, and is characterized in that a member having excellent wear resistance is integrally formed on the sliding surface by sintering.

[実施例コ そこで以下に本発明の詳細を開示した実施例に基づいて
説明する。
[Example] The details of the present invention will be explained below based on the disclosed example.

第1図は本発明の一実施例を示すインパクトヘッドの分
解斜視図、第2図は同上装置の側断面図で、ワイヤーガ
イド(図示せず)を有するノーズ4は、復帰バネ6を有
するスプリングホルダ5の外円周部と位置決めされ、さ
らにフレーム2の孔により位置決めされる。フレーム2
はヨーク8及びサイドヨーク9と協働してレバー10を
吸引するためのもので、その内面に駆動コイル7を巻回
したコア1がリング状に突出形成されている。ヨーク8
の板面とサイドヨーク9の板面には、レバー10が揺動
し得る放射状スリットが形成され、このスリットにより
レバー10の揺動支点をなす支点軸14が保持されるよ
うに構成されている。
FIG. 1 is an exploded perspective view of an impact head showing an embodiment of the present invention, and FIG. 2 is a side sectional view of the same device. It is positioned with the outer circumference of the holder 5 and further positioned with the hole in the frame 2. frame 2
is for attracting the lever 10 in cooperation with the yoke 8 and the side yokes 9, and has a ring-shaped core 1 protruding from its inner surface around which a driving coil 7 is wound. York 8
A radial slit through which the lever 10 can swing is formed in the plate surface of the side yoke 9 and the plate surface of the side yoke 9, and the fulcrum shaft 14, which serves as a swing fulcrum of the lever 10, is held by this slit. .

ところで上記したレバー10は、支点軸14を支点とし
て揺動することにより、その先端に固設した印字ワイヤ
12により印字するためのもので、復帰ハネ6により加
圧され、ストッパー15を有するレバーホルダ16にて
待機位置に保持されるように組み付けられている。
By the way, the above-mentioned lever 10 is for printing with a printing wire 12 fixed at the tip by swinging around a fulcrum shaft 14, and is pressurized by a return spring 6, and is a lever holder having a stopper 15. It is assembled so as to be held at the standby position at 16.

17は上記部品を固定するための固定バネで、ノーズ4
の凸部を固定ハネ17の孔部に挿入することにより位置
決め、固定をするように配設されている。
17 is a fixing spring for fixing the above parts, and the nose 4
It is arranged so that positioning and fixing can be performed by inserting the convex part into the hole of the fixing spring 17.

ここて、コア1のレバー10を吸引する面1aに駆動コ
イル7への通電終了後に生じる残留磁束の消滅を早める
ため及び、コア1とレバー10の吸引による衝突時の耐
摩耗性を高めるために、非磁性層3を配設している。こ
の非磁性層3を例えばセラミックス、N1−P、C1窒
化物、オーステナイト層の金属、Ti−N等にて作成し
、コア1を純鉄、珪素鋼、パーメンジュール等、にて作
成し、コア1の吸引面1aに非磁性層3を積層し、焼結
にて一体化している。またレバー10の吸弓面10aに
も同様な方法にて非磁性層11を形成しても良い。
Here, in order to accelerate the disappearance of the residual magnetic flux that occurs after the end of energization of the drive coil 7 on the surface 1a of the core 1 that attracts the lever 10, and to increase the wear resistance in the event of a collision due to attraction between the core 1 and the lever 10. , a nonmagnetic layer 3 is provided. The nonmagnetic layer 3 is made of, for example, ceramics, N1-P, C1 nitride, austenite layer metal, Ti-N, etc., and the core 1 is made of pure iron, silicon steel, permendur, etc. A non-magnetic layer 3 is laminated on the attraction surface 1a of the core 1 and integrated by sintering. Furthermore, the non-magnetic layer 11 may be formed on the sucking surface 10a of the lever 10 by a similar method.

次に、このように構成された装置の動作について説明す
る。印字データが送られると、駆動コイル7に選択的に
電流が印加され、コア1、フレーム2、ヨーク8、サイ
ドヨーク9、レバー10により構成される磁気回路に磁
束が発生しレバー10を駆動して、レバー10の一端に
係合された印字ワイヤ12が付勢し、印字をする。
Next, the operation of the device configured in this way will be explained. When the print data is sent, a current is selectively applied to the drive coil 7, and magnetic flux is generated in the magnetic circuit constituted by the core 1, frame 2, yoke 8, side yoke 9, and lever 10, and drives the lever 10. Then, the printing wire 12 engaged with one end of the lever 10 is energized to print.

ここで、コア1の吸引面1aには残留磁束の切れを早く
し、耐摩耗性に優れる非磁性層3がコア1に一体的に形
成しであるため、非磁性層3の厚さ及び性能が均一とな
り、レバー10の挙動を安定化でき、さらに衝突時の摩
耗を低減できるので、耐久性が大幅に向上する またレバー10の吸引面10aにも同様の非磁性層11
を形成することにより、上記効果がさらに犬となる。
Here, since a non-magnetic layer 3 is integrally formed on the attraction surface 1a of the core 1, which speeds up the breakage of the residual magnetic flux and has excellent wear resistance, the thickness and performance of the non-magnetic layer 3 are becomes uniform, the behavior of the lever 10 can be stabilized, and wear during a collision can be reduced, so durability is greatly improved.
By forming , the above effect becomes even more pronounced.

第3図は本発明の他の実施例を示す図で、ヨーク8のレ
バー10をガイドする面8aに耐摩耗に優れる部材18
が設けである。この耐摩耗に優れる部材18は例えばセ
ラミックス、N1−PS C1窒化物、Ti−N等にて
作成し、ヨーク8を純鉄、珪素鋼、パーメンジュール等
にて作成し、ヨーク8のレバー10をガイドする面8a
に耐摩耗に優れる部材18を積層し、焼結にて一体化し
ている。
FIG. 3 is a diagram showing another embodiment of the present invention, in which a member 18 having excellent wear resistance is provided on the surface 8a of the yoke 8 that guides the lever 10.
is the provision. The member 18 having excellent wear resistance is made of ceramics, N1-PS C1 nitride, Ti-N, etc., the yoke 8 is made of pure iron, silicon steel, permendur, etc., and the lever 10 of the yoke 8 is made of Surface 8a that guides
A member 18 having excellent wear resistance is laminated on the top and is integrated by sintering.

またレバー10のヨーク8との摺動面10bにも同様な
方法にて耐摩耗に優れる部材18を積層し、焼結にて一
体化し形成しても良い。
Further, a member 18 having excellent wear resistance may be laminated on the sliding surface 10b of the lever 10 with respect to the yoke 8 in a similar manner, and then integrated by sintering.

このように耐摩耗性に優れる部材18をレバー10をガ
イドする摺動面に配設し、かつ焼結によりヨーク8と一
体化したので、結合力が犬で、剥離、ズレ、割れ等の不
具合を生じることがなく、レバー10とヨーク8のクリ
アランスを一定にすることができ、レバー10の挙動を
長期に渡って安定化できるので、耐久性を著しく向上で
きる。
Since the member 18 with excellent wear resistance is disposed on the sliding surface that guides the lever 10 and is integrated with the yoke 8 by sintering, the bonding strength is strong and problems such as peeling, shifting, and cracking can occur. Since the clearance between the lever 10 and the yoke 8 can be made constant without causing any problems, and the behavior of the lever 10 can be stabilized over a long period of time, durability can be significantly improved.

またレバー10の摺動面10bにも同様の耐摩耗性に優
れる部材13を形成することにより、上記効果がさらに
犬となる。
Further, by forming a similar member 13 having excellent wear resistance on the sliding surface 10b of the lever 10, the above-mentioned effect is further enhanced.

第4図は本発明の他の実施例を示す図で、サイドヨーク
9の支点軸14をガイドする面9aに耐摩耗に優れる部
材19が設けである。この耐摩耗に優れる部材19は例
えばセラミックス、NiP、C1窒化物、Ti−N等に
て作成し、サイドヨーク9を純鉄、珪素鋼、パーメンジ
ュール等にて作成し、サイドヨーク9の支点軸14をガ
イドする面9aに耐摩耗に優れる部材19を積層し、焼
結にて一体化している。
FIG. 4 shows another embodiment of the present invention, in which a member 19 having excellent wear resistance is provided on a surface 9a of the side yoke 9 that guides the fulcrum shaft 14. The member 19 having excellent wear resistance is made of, for example, ceramics, NiP, C1 nitride, Ti-N, etc., and the side yoke 9 is made of pure iron, silicon steel, permendur, etc., and the fulcrum of the side yoke 9 is A member 19 having excellent wear resistance is laminated on the surface 9a that guides the shaft 14, and is integrated by sintering.

このように耐摩耗性に優れる部材19を支点軸14をガ
イドする摺動面に配設し、かつ焼結によりサイドヨーク
9と一体化したので、結合力が大で、剥離、ズレ、割れ
等の不具合を生じることがなく、支点軸14をガイドす
ることができるので、支点軸14により回動するレバー
10の挙動を長期に渡って安定化できるので、耐久性を
著しく向上できる [発明の効果コ 以上述べたように本発明によれば、焼結によりコアのレ
バーを吸引する面に非磁性層を一体的に形成し、あるい
は、焼結により摺動面にのみ耐摩耗性に優れる部材を一
体的に形成したので、低コストで、磁気効率の高い、耐
久性能に優れるインパクトヘッドを実現できる。
In this way, the member 19 with excellent wear resistance is disposed on the sliding surface that guides the fulcrum shaft 14, and is integrated with the side yoke 9 by sintering, so the bonding force is large and there is no possibility of peeling, misalignment, cracking, etc. Since the fulcrum shaft 14 can be guided without causing any problems, the behavior of the lever 10 that is rotated by the fulcrum shaft 14 can be stabilized over a long period of time, and the durability can be significantly improved. As described above, according to the present invention, a non-magnetic layer is integrally formed on the surface of the core that attracts the lever by sintering, or a member with excellent wear resistance is formed only on the sliding surface by sintering. Since it is integrally formed, an impact head with high magnetic efficiency and excellent durability can be realized at low cost.

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

第1図は本発明の一実施例を示すインパクトヘッドの分
解斜視図、第2図は本発明の一実施例を示すインパクト
ヘッドの側断面図、第3図は他の実施例を示すヨークと
レバーの断面図、第4図は他の実施例を示すサイドヨー
クと支点軸の断面図である。 1・・・コア 1a・・・コアのレバーを吸引する面 2・・・フレーム 3・・・コアの非磁性層 7・・・駆動コイル 8・・・ヨーク 8a・・・ヨークのレバーをガイドする面9・・・サイ
ドヨーク 9a・・・サイドヨークの支点軸をガイドする面10 
・・・ し )(− 0a・・・レバーの吸引面 Ob・・・レバーのヨークにガイドされる面1・・・レ
バーの非磁性層 2・・・印字ワイヤ 3・・・レバーの耐摩耗性に優れる部材4・・・支点軸 8・・・ヨークに一体的に形成された耐摩耗性に優れる
部材 9・・・サイドヨークに一体的に形成された耐耀耗性に
優れる部材 代理人弁理士 鈴木喜三部 他1名 第2図
Fig. 1 is an exploded perspective view of an impact head showing one embodiment of the present invention, Fig. 2 is a side sectional view of an impact head showing one embodiment of the invention, and Fig. 3 is a yoke and a yoke showing another embodiment. A sectional view of the lever, and FIG. 4 is a sectional view of a side yoke and a fulcrum shaft showing another embodiment. 1... Core 1a... Surface that attracts the lever of the core 2... Frame 3... Non-magnetic layer of the core 7... Drive coil 8... Yoke 8a... Guides the lever of the yoke Surface 9... Side yoke 9a... Surface 10 that guides the fulcrum shaft of the side yoke
... ) (-0a... Lever's suction surface Ob... Lever's surface guided by the yoke 1... Lever's non-magnetic layer 2... Printing wire 3... Lever's wear resistance Member 4 with excellent wear resistance...Fully shaft 8...Member 9 with excellent wear resistance integrally formed on the yoke...Member agent with excellent wear resistance formed integrally on the side yoke Patent attorney Kizobe Suzuki and 1 other person Figure 2

Claims (3)

【特許請求の範囲】[Claims] (1)印字ワイヤと、該印字ワイヤを駆動するレバーと
、該レバーを磁気的に駆動する駆動コイルと、前記レバ
ーを磁気的に吸引するコアを有するフレームにより構成
されたインパクトヘッドにおいて、前記コアの前記レバ
ーを吸引する面に非磁性層を焼結により一体的に形成し
たことを特徴とするインパクトヘッド。
(1) In an impact head configured of a frame including a printing wire, a lever that drives the printing wire, a drive coil that magnetically drives the lever, and a core that magnetically attracts the lever, the core An impact head characterized in that a nonmagnetic layer is integrally formed by sintering on the surface that attracts the lever.
(2)印字ワイヤと、該印字ワイヤを駆動するレバーと
、該レバーを磁気的に駆動する駆動コイルと、前記レバ
ーを磁気的に吸引するコアを有するフレームと、前記レ
バーと協働して磁気回路の一部をなすと共に、前記レバ
ーをガイドするヨークにより構成されたインパクトヘッ
ドにおいて、摺動面に耐摩耗性に優れる部材を焼結によ
り一体的に形成したことを特徴とするインパクトヘッド
(2) A frame having a printing wire, a lever that drives the printing wire, a driving coil that magnetically drives the lever, a core that magnetically attracts the lever, and a frame that cooperates with the lever to magnetically attract the lever. An impact head comprising a yoke forming a part of a circuit and guiding the lever, characterized in that a member having excellent wear resistance is integrally formed on the sliding surface by sintering.
(3)印字ワイヤと、該印字ワイヤを駆動するレバーと
、該レバーを磁気的に駆動する駆動コイルと、前記レバ
ーを磁気的に吸引するコアを有するフレームと、前記レ
バーの揺動支点をなす支点軸と、前記レバーと協働して
磁気回路の一部をなすと共に、前記支点軸をガイドする
サイドヨークにより構成されたインパクトヘッドにおい
て、摺動面に耐摩耗性に優れる部材を焼結により一体的
に形成したことを特徴とするインパクトヘッド。
(3) A frame having a printing wire, a lever that drives the printing wire, a drive coil that magnetically drives the lever, a core that magnetically attracts the lever, and a frame that serves as a swinging fulcrum for the lever. In an impact head composed of a fulcrum shaft and a side yoke that cooperates with the lever to form part of a magnetic circuit and guide the fulcrum shaft, a material with excellent wear resistance is sintered on the sliding surface. An impact head characterized by being integrally formed.
JP13804490A 1990-05-28 1990-05-28 Impact head Pending JPH0431061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13804490A JPH0431061A (en) 1990-05-28 1990-05-28 Impact head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13804490A JPH0431061A (en) 1990-05-28 1990-05-28 Impact head

Publications (1)

Publication Number Publication Date
JPH0431061A true JPH0431061A (en) 1992-02-03

Family

ID=15212699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13804490A Pending JPH0431061A (en) 1990-05-28 1990-05-28 Impact head

Country Status (1)

Country Link
JP (1) JPH0431061A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
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US6848843B1 (en) * 2003-09-03 2005-02-01 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US6994482B2 (en) 2004-03-23 2006-02-07 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7008126B2 (en) 2003-09-04 2006-03-07 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7018116B2 (en) 2004-03-12 2006-03-28 Toshiba Tec Kabushiki Kaisha Armature, wire dot printer head and wire dot printer
US7048455B2 (en) 2004-03-15 2006-05-23 Toshiba Tec Kabushiki Kaisha Wire dot printer head with abrasion having magnetic permeability and hardness surface
US7137748B2 (en) 2004-03-22 2006-11-21 Toshiba Tec Kabushiki Kaisha Nitride layer forming method, magnetic circuit forming member, armature, wire dot printer head and wire dot printer
US7172351B2 (en) 2004-01-26 2007-02-06 Toshiba Tec Kabushiki Kaisha Method for manufacturing an armature
US7258499B2 (en) 2003-09-03 2007-08-21 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7278794B2 (en) 2004-03-12 2007-10-09 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7329059B2 (en) 2004-03-15 2008-02-12 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7331726B2 (en) 2004-03-12 2008-02-19 Toshiba Tec Kabushiki Kaisha Armature, wire dot printer head and wire dot printer
US7374354B2 (en) 2004-03-23 2008-05-20 Toshiba Tec Kabushiki Kaisha Armature, wire dot printer head and wire dot printer

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6848843B1 (en) * 2003-09-03 2005-02-01 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7314323B2 (en) 2003-09-03 2008-01-01 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7258499B2 (en) 2003-09-03 2007-08-21 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7008126B2 (en) 2003-09-04 2006-03-07 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7172351B2 (en) 2004-01-26 2007-02-06 Toshiba Tec Kabushiki Kaisha Method for manufacturing an armature
US7018116B2 (en) 2004-03-12 2006-03-28 Toshiba Tec Kabushiki Kaisha Armature, wire dot printer head and wire dot printer
US7278794B2 (en) 2004-03-12 2007-10-09 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7331726B2 (en) 2004-03-12 2008-02-19 Toshiba Tec Kabushiki Kaisha Armature, wire dot printer head and wire dot printer
US7048455B2 (en) 2004-03-15 2006-05-23 Toshiba Tec Kabushiki Kaisha Wire dot printer head with abrasion having magnetic permeability and hardness surface
US7329059B2 (en) 2004-03-15 2008-02-12 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7461986B2 (en) 2004-03-15 2008-12-09 Toshiba Tec Kabushiki Kaisha Wire dot printer
US7137748B2 (en) 2004-03-22 2006-11-21 Toshiba Tec Kabushiki Kaisha Nitride layer forming method, magnetic circuit forming member, armature, wire dot printer head and wire dot printer
US6994482B2 (en) 2004-03-23 2006-02-07 Toshiba Tec Kabushiki Kaisha Wire dot printer head and wire dot printer
US7374354B2 (en) 2004-03-23 2008-05-20 Toshiba Tec Kabushiki Kaisha Armature, wire dot printer head and wire dot printer

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