JPH0226754A - Spring charge type dot head - Google Patents

Spring charge type dot head

Info

Publication number
JPH0226754A
JPH0226754A JP17790588A JP17790588A JPH0226754A JP H0226754 A JPH0226754 A JP H0226754A JP 17790588 A JP17790588 A JP 17790588A JP 17790588 A JP17790588 A JP 17790588A JP H0226754 A JPH0226754 A JP H0226754A
Authority
JP
Japan
Prior art keywords
leaf spring
yoke plate
spring
armature
fixed
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
JP17790588A
Other languages
Japanese (ja)
Inventor
Yoshiaki Takashima
高嶋 芳明
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 JP17790588A priority Critical patent/JPH0226754A/en
Publication of JPH0226754A publication Critical patent/JPH0226754A/en
Pending legal-status Critical Current

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  • Impact Printers (AREA)

Abstract

PURPOSE:To obtain a spring charge head having excellent printing quality and durability at low cost at small sized light-weight printing speed by mounting a high hardness layer onto the surface of a yoke plate. CONSTITUTION:A wire 3 is fixed to an armature 5 through a lever 4, and the armature 5 is fastened integrally to a leaf spring 2. The leaf spring 2 is fixed to a yoke plate 1. The carburizing curing treatment (a) of hardness Hv=300-700 and depth of 0.05-0.5mm is executed to the surface of the yoke plate 1. Consequently, since the leaf spring 2 is deformed while using the corner section (b) of the yoke plate 1 as a fulcrum under the state of holding, working stress concentrates to the section, but carburizing curing treatment (a) is executed to the surface of the yoke plate 2, thus preventing the generation of deformation and abrasion. Accordingly, the strain energy of the leaf spring 2 is stabilized for a prolonged term, thus obviating the deterioration of printing quality.

Description

【発明の詳細な説明】 [産業上の利用分野コ 本発明は、フンピー−ター周辺端末用プリンターなどの
印字装置であるワイヤートッドヘッドに関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wire tod head which is a printing device such as a printer for a computer peripheral terminal.

[従来の技術] 従来、第3図に示すように、ヨーク板31と板バネ62
との係合部分で、ヨーク板隅部が板バネの作動応力によ
って変形、摩耗するのを防ぐために、高硬度スペーサー
33を具備する方法が知られていた。
[Prior Art] Conventionally, as shown in FIG. 3, a yoke plate 31 and a plate spring 62
In order to prevent the corners of the yoke plate from being deformed and worn out due to the operating stress of the leaf spring, a method is known in which a high hardness spacer 33 is provided at the engaging portion of the yoke plate.

また、板バネの横幅を広くしたり、板厚を薄くする方法
によりヨーク板隅部にかがる作動応力を低減する方法が
知られていた [発明が解決しようとする課題] しかし、前述の従来方法で高硬度スペーサー66を設け
ている場合は、高硬度スペーサー65の形状精度や変形
、ソリ、さらに取付は時の位置ズレにより板バネ52の
自由長が個々に変わってしまい、板バネの歪みエネルギ
ーのバラツキが大きくなって印字不良になりやすいとい
う欠点を有していた。また、板バネの横幅を拡げたり板
厚を薄くする方法は板バネ形状が大型化してしまうこと
によりドツトヘッドが小型軽量化できないという欠点を
有していた。そこで、本発明は従来の間諜点を解決する
もので、印字品質が優れ、小型軽量で長寿命なバネチャ
ージ式ドツトヘッドを安価に得ろことを目的としている
In addition, there is a known method of reducing the operating stress applied to the corners of the yoke plate by increasing the width of the plate spring or reducing the plate thickness.[Problem to be Solved by the Invention] When the high-hardness spacer 66 is provided using the conventional method, the free length of the leaf spring 52 changes individually due to the shape accuracy, deformation, and warpage of the high-hardness spacer 65, and also due to positional deviation during installation. This method has the disadvantage that the variation in strain energy becomes large, which tends to cause printing defects. Furthermore, the method of widening the width of the leaf spring or reducing the thickness of the leaf spring has the disadvantage that the shape of the leaf spring becomes large and the dot head cannot be made smaller and lighter. SUMMARY OF THE INVENTION The present invention aims to solve the problems of the prior art and to provide a spring-charged dot head that has excellent print quality, is compact, lightweight, and has a long service life at a low cost.

[課題を解決するための手段] 上記間部点を解決するために、本発明のスプリングチャ
ージ式ドッ1ヘッドは、板バネの自由端に固着したアー
マチャーを永久磁石の磁力により前記板バネを変形させ
て、コア端面に吸着させた保持状態から、電磁フィルに
電流を流すことにより、iII記永久磁石の磁力を打ち
消して、前記板バネに蓄えられていた歪みエネルギーに
より、前記アーマチャーを開放して、前記アーマチャー
に固着したワイヤーを選択的に突出させて、ドツトマト
リクス印字を行うスプリングチャージ式ドツトヘッドに
おいて、ヨーク板の表面に、Hv=3DO〜700、深
さ0.05〜0.5Bの表面硬化層を設けたことを特徴
とする。
[Means for Solving the Problems] In order to solve the above problem, the spring-charged dot head of the present invention deforms the armature fixed to the free end of the leaf spring by the magnetic force of a permanent magnet. Then, from the held state in which the core is attracted to the end surface, a current is applied to the electromagnetic filter to cancel the magnetic force of the permanent magnet described in III above, and the armature is opened by the strain energy stored in the leaf spring. In a spring-charged dot head that performs dot matrix printing by selectively protruding the wire fixed to the armature, the surface of the yoke plate is hardened to a depth of 0.05 to 0.5B with Hv=3DO to 700. It is characterized by having layers.

[実施例] 以下に本発明の実施例を図面に基づいて説明する。[Example] Embodiments of the present invention will be described below based on the drawings.

第1図に示す実施例において、ワイヤー3はレバー4を
介してアーマチャー5に固着され、さらにアーマチャー
5は板バネ2と一体に固着されている。この板バネ2は
ヨーク板1に固着されている。第1図の下部に示す状態
が、永久磁石乙の磁力によりアーマチャー5がコア7の
端面に吸着され、板バネ2を変形させて歪みエネルギー
を蓄えた保持状態である。第1図の上部に示す状態が、
電磁コイル8に電流を流し永久磁石6の磁力を打ち消し
て、板バネ2に蓄えられた歪みエネルギーによりアーマ
チャー5を解放して、ワイヤー3の先端がリボン9を介
して印字紙10にドツトを形成する印字状態である。こ
こで、ヨーク板10表面には、高度Hv = 500±
50、深さ0.05−0−1 ranの浸炭硬化処理α
がなされており、本発明の特徴的部分をなすものである
In the embodiment shown in FIG. 1, the wire 3 is fixed to an armature 5 via a lever 4, and the armature 5 is fixed integrally with the leaf spring 2. This leaf spring 2 is fixed to the yoke plate 1. The state shown in the lower part of FIG. 1 is a holding state in which the armature 5 is attracted to the end face of the core 7 by the magnetic force of the permanent magnet B, deforming the leaf spring 2 and storing strain energy. The state shown at the top of Figure 1 is
A current is applied to the electromagnetic coil 8 to cancel the magnetic force of the permanent magnet 6, and the armature 5 is released by the strain energy stored in the leaf spring 2, so that the tip of the wire 3 forms a dot on the printing paper 10 via the ribbon 9. The printing condition is as follows. Here, the surface of the yoke plate 10 has an altitude Hv = 500±
50, carburization hardening treatment α of depth 0.05-0-1 ran
This is a characteristic part of the present invention.

第1図の下部に示す保持状態では、板バネ2はヨーク板
1の隅部すを支点として変形しているため、この部分に
作動応力が集中しているが、ヨーク板20表面には浸炭
硬化処理αがなされているため変形、摩耗が起きない。
In the held state shown in the lower part of FIG. 1, the leaf spring 2 is deformed using the corner of the yoke plate 1 as a fulcrum, so the operating stress is concentrated in this part, but the surface of the yoke plate 20 is carburized. Hardening treatment α prevents deformation and wear.

このとき浸炭層の硬度は仮バネ2と同等あるいはそれ以
下なので板バネ2が1貿耗することはない。このため長
期にわたり板バネ2の歪みエネルギーの安定化が計れ印
字品質を低下させることがない。
At this time, since the hardness of the carburized layer is equal to or lower than that of the temporary spring 2, the leaf spring 2 does not wear out. Therefore, the strain energy of the leaf spring 2 is stabilized over a long period of time, and printing quality is not degraded.

また、表面を硬化させることによりヨーク板の剛性が大
幅にアップするので組立時にこの部品の変形による不良
が低減する。
Furthermore, by hardening the surface, the rigidity of the yoke plate is greatly increased, which reduces defects due to deformation of this part during assembly.

同時に従来、変形、磨耗防止用のために使用していた高
硬度スペーサーを必要としないために、製造コストを大
幅に低減できる。
At the same time, manufacturing costs can be significantly reduced because there is no need for high-hardness spacers, which were conventionally used to prevent deformation and wear.

さらに、板バネの横幅を拡げたり、板厚を薄くしてバネ
力をダウンさせてヨーク板隅部の変形。
Furthermore, the corners of the yoke plate can be deformed by increasing the width of the plate spring or reducing the plate thickness to reduce the spring force.

磨耗防止を行う必要がないため、板バネ2のバネ力の強
化、小型化が可能となりドツトヘッドの小型軽量、高印
字スピード化が可能になる。
Since there is no need to prevent wear, the spring force of the leaf spring 2 can be strengthened and the dot head can be made smaller, making it possible to make the dot head smaller and lighter and to increase printing speed.

第2図は、浸炭硬化処理を行ったヨーク板の上下面を研
磨した後、板バネ22と固着しているがヨーク板21の
隅部、内外周部には浸炭硬化部Cが残っているので、先
の実施例と同様の効果が得られる。
Figure 2 shows that after polishing the upper and lower surfaces of a yoke plate that has been carburized and hardened, it is firmly attached to the leaf spring 22, but carburized and hardened parts C remain at the corners and inner and outer circumferences of the yoke plate 21. Therefore, the same effects as in the previous embodiment can be obtained.

また、表面硬化処理方法として浸炭硬化処理の池に、窒
化硬化処理、無電IIKニッケルメッキ処理セラミック
コーティング処理、炭化チタン化学蒸着処理によって行
っても同様の効果が得られろ。
Further, the same effect can be obtained by performing a nitriding hardening treatment, an electroless IIK nickel plating treatment, a ceramic coating treatment, or a titanium carbide chemical vapor deposition treatment in addition to the carburizing treatment as a surface hardening treatment method.

[発明の効果コ 本発明は、以上説明したように、ヨーク板の表面に高硬
度層を設けることにより、板バネとの係合部分の変形、
磨耗を防ぐことができ、小型軽量高印字スピードで、印
字品質と耐久性に優れたスプリングチャージヘッドを安
価に得ることができる効果がある。
[Effects of the Invention] As explained above, the present invention provides a high hardness layer on the surface of the yoke plate to reduce the deformation of the engagement portion with the plate spring.
This has the effect of preventing wear and making it possible to obtain a spring-charged head that is small, lightweight, high printing speed, and has excellent printing quality and durability at a low cost.

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

第1図は、本発明の実施例を示す断面図。 第2図は、他の実施例を示す断面図。 第6図は、従来方法を示す断面図である。 1 21・・・・・・・・ヨーク板 2.22・・・・・・・・・板バネ ろ   ・・・・・・・・ワイヤー 4   ・・・・・・・・レバー 5   ・・・・・・・・・プランジャー6   ・・
・・・・・・・永久磁石 7   ・・・・・・・・・コ ア 8   ・・・・・・・・・′tiコイル9    ・
・・・・・・・・リボン 10  ・・・・・・・・・印字紙 Q、C・・・・・・・・・浸炭硬化層 b   ・・・・・・・・・隅部(板バネ変形支点部)
第 図 3−7枚 419−ノく峯 ワイヤー レノぐ−
FIG. 1 is a sectional view showing an embodiment of the present invention. FIG. 2 is a sectional view showing another embodiment. FIG. 6 is a sectional view showing a conventional method. 1 21...Yoke plate 2.22...Plate spring roller...Wire 4...Lever 5... ...Plunger 6...
......Permanent magnet 7 ......Core 8 ......'ti coil 9 ・
...... Ribbon 10 ...... Print paper Q, C ...... Carburized hardened layer b ...... Corner (plate Spring deformation fulcrum)
Figure 3-7 419-Nokmine Wire Renogu-

Claims (1)

【特許請求の範囲】[Claims] 板バネの自由端に固着したアーマチャーを永久磁石の磁
力により前記板バネを変形させて、コア端面に吸着させ
た保持状態から、電磁コイルに電流を流すことにより、
前記永久磁石の磁力を打ち消して、前記板バネに蓄えら
れていた歪みエネルギーにより、前記アーマチャーを開
放して、前記アーマチャーに固着したワイヤーを選択的
に突出させて、ドットマトリクス印字を行うスプリング
チャージ式ドットヘッドにおいて、ヨーク板の表面に、
Hv=300〜700、深さ0.05〜0.5mmの表
面硬化層を設けたことを特徴とするスプリングチャージ
式ドットヘッド。
By deforming the armature fixed to the free end of the leaf spring by the magnetic force of a permanent magnet, and applying a current to the electromagnetic coil from the state in which the leaf spring is held attracted to the end face of the core,
A spring-charged type that performs dot matrix printing by canceling the magnetic force of the permanent magnet and using the strain energy stored in the leaf spring to open the armature and selectively protrude the wire fixed to the armature. In the dot head, on the surface of the yoke plate,
A spring-charged dot head characterized by having a surface hardening layer with Hv=300-700 and a depth of 0.05-0.5 mm.
JP17790588A 1988-07-15 1988-07-15 Spring charge type dot head Pending JPH0226754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17790588A JPH0226754A (en) 1988-07-15 1988-07-15 Spring charge type dot head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17790588A JPH0226754A (en) 1988-07-15 1988-07-15 Spring charge type dot head

Publications (1)

Publication Number Publication Date
JPH0226754A true JPH0226754A (en) 1990-01-29

Family

ID=16039111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17790588A Pending JPH0226754A (en) 1988-07-15 1988-07-15 Spring charge type dot head

Country Status (1)

Country Link
JP (1) JPH0226754A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5203870A (en) * 1990-06-28 1993-04-20 Toyota Jidosha Kabushiki Kaisha Method and apparatus for detecting abnormal state of evaporative emission-control system
US5251477A (en) * 1990-02-26 1993-10-12 Nippondenso Co., Ltd. Self-diagnosis apparatus in a system for prevention of scattering of fuel evaporation gas
US5317909A (en) * 1991-04-02 1994-06-07 Nippondenso Co., Ltd. Abnormality detecting apparatus for use in fuel transpiration prevention systems
US5347971A (en) * 1992-06-08 1994-09-20 Nippondenso Co., Ltd. Apparatus for monitoring air leakage into fuel supply system for internal combustion engine
US5363828A (en) * 1992-07-22 1994-11-15 Aisan Kogyo Kabushiki Kaisha Fuel vapor processing apparatus of internal combustion engine
US5447141A (en) * 1993-11-09 1995-09-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative emission control system for internal combustion engines
US5570674A (en) * 1994-11-25 1996-11-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative emission control system for internal combustion engines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251477A (en) * 1990-02-26 1993-10-12 Nippondenso Co., Ltd. Self-diagnosis apparatus in a system for prevention of scattering of fuel evaporation gas
US5203870A (en) * 1990-06-28 1993-04-20 Toyota Jidosha Kabushiki Kaisha Method and apparatus for detecting abnormal state of evaporative emission-control system
US5317909A (en) * 1991-04-02 1994-06-07 Nippondenso Co., Ltd. Abnormality detecting apparatus for use in fuel transpiration prevention systems
US5347971A (en) * 1992-06-08 1994-09-20 Nippondenso Co., Ltd. Apparatus for monitoring air leakage into fuel supply system for internal combustion engine
US5363828A (en) * 1992-07-22 1994-11-15 Aisan Kogyo Kabushiki Kaisha Fuel vapor processing apparatus of internal combustion engine
US5447141A (en) * 1993-11-09 1995-09-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative emission control system for internal combustion engines
US5570674A (en) * 1994-11-25 1996-11-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative emission control system for internal combustion engines

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