JPS60135263A - Method for finishing leading end of needle of dot printer - Google Patents

Method for finishing leading end of needle of dot printer

Info

Publication number
JPS60135263A
JPS60135263A JP24347983A JP24347983A JPS60135263A JP S60135263 A JPS60135263 A JP S60135263A JP 24347983 A JP24347983 A JP 24347983A JP 24347983 A JP24347983 A JP 24347983A JP S60135263 A JPS60135263 A JP S60135263A
Authority
JP
Japan
Prior art keywords
needle
armature
yoke
tip
electrode
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
JP24347983A
Other languages
Japanese (ja)
Inventor
Shigeo Komagine
駒木根 茂生
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.)
Tokyo Sanyo Electric Co Ltd
Toshiba TEC Corp
Original Assignee
Tokyo Sanyo Electric Co Ltd
Tokyo Electric Co Ltd
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 Tokyo Sanyo Electric Co Ltd, Tokyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP24347983A priority Critical patent/JPS60135263A/en
Publication of JPS60135263A publication Critical patent/JPS60135263A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22Typewriters 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
    • B41J2/23Typewriters 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
    • B41J2/235Print head assemblies
    • B41J2/25Print wires
    • B41J2/255Arrangement of the print ends of the wires

Landscapes

  • Impact Printers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

PURPOSE:To prevent the abrasion of the fulcrum part of an armature by making it possible to interpose a soft thin piece between a yoke and the armature, by constituting the yoke so as to detach the same from a current supply circuit when the leading end of a needle is finished by discharge processing. CONSTITUTION:Because a cover 19, an armature spring 20, an armature 16 and a needle 18 are successively contacted so as to be capable of electrically receiving the supply of a current, the pin 25 provided to a jig 24 in an erected state is inlaid with a positional determination hole 23. Subsequently, the connection plate 26 connected to the anode of a power source is contacted with the cover 19 and the electrode 27 positioned so as to leave a definite distance from the pin 25 is contacted to the cathode of the power source. Therefore, the leading end of each needle 18 is uniformly finished by discharge action between the electrode 27 and the leading end of the needle 18. Because discharge processing can be performed in such a state that a yoke 12 is detached from a current supply circuit, soft thin pieces 15 can be interposed between the yoke 12, a core 13 and the armature 16. As a result, the abrasion of a fulcrum part 17 is prevented and durability can be enhanced.

Description

【発明の詳細な説明】 発明の技術分野 この発明は、ドツトプリンタのニードル先端仕上方法に
関する。
TECHNICAL FIELD OF THE INVENTION This invention relates to a method for finishing a needle tip of a dot printer.

発明の技術的背景及びその問題点 まず、第1図に従来のドツトプリンタの代表例を示す。Technical background of the invention and its problems First, FIG. 1 shows a typical example of a conventional dot printer.

(1)は環状のヨークで、このヨーク(1)にはコイル
(2)が装着された複数のコア(3)が立設され、ヨー
ク(1)の外周縁を支点(4)としてアマチュア(5)
が起伏自在に保持されている。アマチュア(5)とこの
アマチュア(5)に溶接されたニードル(7)とはスプ
リング(7a)に付勢されているが、ゴム等のストツノ
く(8)によ多復帰位置が定められている。ドツトプリ
ンタにおいて重要なことはニードル(7)の先端を同一
平面上に仕上げてドツトの濃淡を均一にすることである
。ニードル(7)の先端を仕上げる手段として、ニード
ル(カの先端に対向させて電極を設け、この電極を電源
の陰極に接続し、ニードル(カからアマチュア(5)を
介して電気的に接続されるヨーク(1)を電源の1湯極
に接続し、電極とニードル(力先端との間の放電作用に
よりニードル先端先端を仕上げる方法が考えられる。
(1) is an annular yoke, on which a plurality of cores (3) to which coils (2) are attached are erected, and an armature ( 5)
is maintained freely. The armature (5) and the needle (7) welded to this armature (5) are biased by a spring (7a), but the return position is determined by a stopper (8) made of rubber or the like. . What is important in a dot printer is to finish the tip of the needle (7) on the same plane so that the dots have uniform shading. As a means of finishing the tip of the needle (7), an electrode is provided opposite the tip of the needle (motor), and this electrode is connected to the cathode of the power source, and electrically connected from the needle (motor) via the armature (5). One possible method is to connect the yoke (1) to the first hot water electrode of a power source and finish the tip of the needle by a discharge action between the electrode and the needle (power tip).

しかしながら、アマチュア(5)とヨーク(1)とを直
接接触させなければならないので支点(4)の部分が摩
耗し耐久性が劣る問題がある。
However, since the armature (5) and the yoke (1) must be brought into direct contact, there is a problem that the fulcrum (4) is worn out, resulting in poor durability.

発明の目的 この発明はこのような点に鑑みなされたもので、摩耗防
止のためにアマチュアとヨーク及びコアとの間に軟質の
薄片を介装したものにおいてもニードル先端を放電加工
によって仕上げることができるドツトプリンタのニード
ル先端仕上方法を提供することを目的とする。
Purpose of the Invention The present invention has been made in view of the above points, and it is possible to finish the needle tip by electric discharge machining even in the case where a soft thin piece is interposed between the armature, the yoke, and the core to prevent wear. The purpose of the present invention is to provide a method for finishing the needle tip of a dot printer.

発明の概要 この発明は、それぞれ金属材によるカバーとアマチュア
スプリングとアマチュアとニードルとを順次電気的に導
通させるように連結し、ニードルの先端に対向する電極
と前記カバーとの間に電圧を印加してニードルの先端を
放電加工によシ仕上げるようにし、これにょシ、ヨーク
は放電加工に際して通電回路から外れているため、ヨー
クとアマチュアとの間に軟質の薄片を介装することがで
き、アマチュアの支点部の摩耗を防止し耐久性を向上さ
せうるように構成したものである。
Summary of the Invention The present invention connects a cover made of a metal material, an armature spring, and an armature and a needle in order to electrically conduct each other, and applies a voltage between the cover and an electrode facing the tip of the needle. The tip of the needle is finished by electrical discharge machining, and since the yoke is removed from the current-carrying circuit during electrical discharge machining, a soft thin piece can be inserted between the yoke and the armature, and the armature The structure is designed to prevent wear of the fulcrum part and improve durability.

発明の実施例 この発明の一実施例を第2図及び第3図に基いて説明す
る。ニードルガイド(9)を保持するガイドフレーム(
10)とハウジング0υとが一体的に形成され、このハ
ウジングfllLK環状のヨーク(121が固定されつ
つ収納されている。ヨーク(l渇に立設された複数のコ
ア(I尋にはコイル(14+が装着され、プラスチック
スシート等の軟質の薄片0ωを間にしてこれらのコア(
]31と対向する金属材によるアマチュアθ0がヨーク
(1りの外周縁を支点αηとして起伏自在に設けられて
いる。各アマチュア(16)に溶接された鋼線によるニ
ードル賭はニードルガイド(9)に挿通されている。
Embodiment of the Invention An embodiment of the invention will be described with reference to FIGS. 2 and 3. Guide frame that holds the needle guide (9) (
10) and the housing 0υ are integrally formed, and a ring-shaped yoke (121) is fixedly housed in the housing. are attached, and these cores (
] An armature θ0 made of a metal material facing the yoke (16) is provided in a freely undulating manner with the outer peripheral edge of the yoke (1) as a fulcrum αη.A needle guide (9) made of a steel wire welded to each armature (16) is inserted into.

ついで、ハウジング(11)の開口面を閉塞する金属材
のカバー傾の内面にはアマチュア(te+を復帰方向へ
付勢する鋼板による花弁形のアマチュアスゲリング(」
とこれらのアマチュアαeの復帰位置を定めるゴムに、
するストッパQυとが固定されている。さらに、ガイド
フレーム01)には図示しないがキャリアに取付けるた
め取付孔(2りとこのキャリアに立設されたビンに係合
する位置決め部である位置決め孔(2)とが形成されて
いる。
Next, on the inner surface of the metal cover that closes the opening surface of the housing (11), there is a petal-shaped armature armature made of a steel plate that biases the armature (te+ in the return direction).
and the rubber that determines the return position of these amateur αe,
A stopper Qυ is fixed. Further, although not shown, the guide frame 01) is formed with mounting holes (2), which are positioning portions that engage with bottles erected on the carrier, for mounting on the carrier.

しかして、カバー(11,アマチュアスゲリングシ0、
アマチュア(161,ニードル(t81は順次電気的に
通電可能に接触するので、第3図に示すように治具(ロ
)から立設されたビン(ハ)を位置決め孔(ハ)に嵌合
してガイドフレーム(10)を固定する。ついで、電源
の陽極に接続された接続板(イ)をカバー<19に接触
し、ビン(陶と一定の距離をもって位置させた電極(2
)を電源の陰極に接する。したがって、電極C27)と
ニードルf181先端との間の放電作用によシ各ニード
ル(18の先端が均一に仕上げられる。放電にともなう
熱は電極C2η及びガイドフレーム(1@の先端をオイ
ル弼に浸すことにより冷却する。
However, the cover (11, Amateur Sgelingsi 0,
Since the armature (161 and the needle (t81) contact each other in order to enable electrical conduction, as shown in Fig. 3, fit the bottle (c) set up from the jig (b) into the positioning hole (c). to fix the guide frame (10).Next, connect the connection plate (A) connected to the anode of the power source to the cover
) to the cathode of the power supply. Therefore, the tip of each needle (18) is uniformly finished by the discharge action between the electrode C27) and the tip of the needle f181. Cool by cooling.

このように、ヨーク(1りを通電回路から外して放電加
工することができるので、ヨーク(1B及びコア(1,
1とアマチュアαeとの間に軟質の薄片(15)を介装
することができる。したがって、支点(17)部の摩耗
を防止して耐久性を高めることができる。
In this way, the yoke (1B) and the core (1,
A soft thin piece (15) can be interposed between 1 and armature αe. Therefore, wear of the fulcrum (17) can be prevented and durability can be increased.

発明の効果 この発明は上述のように構成したので、ニードルの先端
に対向させた電極を電源の一極に接続し、ヨークを通電
回路から外してニードルをアマチュア、アマチュアスプ
リング、カバー、電源の他極に順次接続して放電加工を
行ない、ニードルの先端を均一に仕上げることができ、
したがって、ヨーク及びコアとアマチュアとの間に軟質
の薄片を介装してアTチェア支点部の摩耗を防止するこ
とができ、耐久性を向上することができる等の効果を有
するものである。
Effects of the Invention Since the present invention is configured as described above, the electrode facing the tip of the needle is connected to one pole of the power supply, the yoke is removed from the energizing circuit, and the needle is connected to the armature, armature spring, cover, power supply, etc. The tip of the needle can be finished uniformly by connecting the poles one after another and performing electrical discharge machining.
Therefore, by interposing a soft thin piece between the yoke, the core, and the armature, it is possible to prevent the abrasion of the fulcrum part of the T-chair, and the durability can be improved.

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

第1図は従来例を示す縦断側面図、第2図はこの発明の
一実施例を示す縦断側面図、第3図はその放電加工状態
を示す縮小した側面図である。 10・・・カイトフレーム、11・・・ハムリング、1
2・・・ヨーク、 13・・・コア、14・・・コイル
、15・・・薄片、16・・・アマチュア、18・・・
ニードル、19・・・カバー、2o・・・アマチュアス
プリング、23・・・位置決め孔(位置決め部)、27
・・・電極 出 願 人 東京電気株式会社 3.1 図 j、3図
FIG. 1 is a longitudinal side view showing a conventional example, FIG. 2 is a longitudinal side view showing an embodiment of the present invention, and FIG. 3 is a reduced side view showing the electric discharge machining state. 10...Kite frame, 11...Ham ring, 1
2... Yoke, 13... Core, 14... Coil, 15... Thin piece, 16... Amateur, 18...
Needle, 19...Cover, 2o...Amateur spring, 23...Positioning hole (positioning part), 27
...Electrode applicant Tokyo Electric Co., Ltd. 3.1 Figures j and 3

Claims (1)

【特許請求の範囲】[Claims] 一面開口のハウジングにコイルが装着された複数のコア
を有するヨークを収納し、ニードルの後端に電気的に接
触させて連結された複数の金属材によるアマチュアを前
記コアに対向させて起伏自在に設け、キャリアへの取付
位置を決める位置決め部を有するガイドフレームに前記
ニードルをスライド自在に挿入し、前記ハウジングの開
口面を覆う金属材のカバーの内面と前記アマチュアとに
このアマチュアを復帰方向へ付勢する導電性材料による
アマチュアスプリングを弾発的に接触させ、前記ガイド
フレームの先端から突出する前記ニードルとの間にギャ
ップをあけて対向する電極を前記位置決め部に対して一
定の距離をもって位置させ、前記電極と前記カバーとの
間に電圧を印加して前記ニードルと前記電極との間の放
電作用によシ前記ニードルの先端を一定に仕上げるよう
にしたことを特徴とするドツトプリンタのニードル先端
仕上方法。
A yoke with multiple cores equipped with coils is housed in a housing with an opening on one side, and an armature made of multiple metal materials connected in electrical contact with the rear end of the needle is opposed to the core and can be raised and lowered freely. The needle is slidably inserted into a guide frame having a positioning part that determines the attachment position to the carrier, and the armature is attached in the return direction between the inner surface of a metal cover that covers the opening surface of the housing and the armature. An armature spring made of a conductive material is brought into elastic contact with the needle protruding from the tip of the guide frame, and an opposing electrode is positioned at a certain distance from the positioning part with a gap formed between the armature spring and the needle protruding from the tip of the guide frame. A needle tip finish for a dot printer, characterized in that a voltage is applied between the electrode and the cover so that the tip of the needle is finished uniformly by a discharge action between the needle and the electrode. Method.
JP24347983A 1983-12-23 1983-12-23 Method for finishing leading end of needle of dot printer Pending JPS60135263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24347983A JPS60135263A (en) 1983-12-23 1983-12-23 Method for finishing leading end of needle of dot printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24347983A JPS60135263A (en) 1983-12-23 1983-12-23 Method for finishing leading end of needle of dot printer

Publications (1)

Publication Number Publication Date
JPS60135263A true JPS60135263A (en) 1985-07-18

Family

ID=17104497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24347983A Pending JPS60135263A (en) 1983-12-23 1983-12-23 Method for finishing leading end of needle of dot printer

Country Status (1)

Country Link
JP (1) JPS60135263A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812061A (en) * 1986-08-28 1989-03-14 Tokyo Electric Co., Ltd. Technique for improving the wear resistance of a wire matrix printing head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812061A (en) * 1986-08-28 1989-03-14 Tokyo Electric Co., Ltd. Technique for improving the wear resistance of a wire matrix printing head

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