JPH07276674A - Printing hammer mechanism - Google Patents

Printing hammer mechanism

Info

Publication number
JPH07276674A
JPH07276674A JP7727894A JP7727894A JPH07276674A JP H07276674 A JPH07276674 A JP H07276674A JP 7727894 A JP7727894 A JP 7727894A JP 7727894 A JP7727894 A JP 7727894A JP H07276674 A JPH07276674 A JP H07276674A
Authority
JP
Japan
Prior art keywords
printing
yoke
leaf spring
ribbon
hammer mechanism
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
JP7727894A
Other languages
Japanese (ja)
Inventor
Koichi Yageta
幸一 谷下田
Toshio Hiki
俊男 比気
Yasuki Motoki
康喜 元木
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki 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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP7727894A priority Critical patent/JPH07276674A/en
Publication of JPH07276674A publication Critical patent/JPH07276674A/en
Pending legal-status Critical Current

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  • Impact Printers (AREA)

Abstract

PURPOSE:To eliminate a ribbon shield plate by making the shape of the hole for the operation of a printing pin provided to a front yoke on a suction side smaller than that on a printing side. CONSTITUTION:A printing hamamer consists of a yoke 1 forming a magnetic circuit, a yoke base 3, a front yoke 4, a magnet 2 generating magnetism, a printing pin 6, a leaf spring 5 for storing printing energy, the coil 7 negating the magnetism of the magnet 2 and allowing the leaf spring 5 to fly to allow the printing pin 6 to form a dot and the ribbon separator 9 provided between an ink ribbon 8 and printing paper 10. In the front yoke 4, the size of the hole on the printing side of the yoke 4 is made smaller than that on the suction side thereof.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はドットラインプリンタに
使用される印字ハンマ機構に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print hammer mechanism used in a dot line printer.

【0002】[0002]

【従来の技術】板バネ状印字ハンマを例えばマグネット
2の磁気吸引力によって非印字位置に保持し、釈放用電
磁コイル7(以下単にコイルという)に所定パルス幅の
釈放電流を供給することによって前記印字ハンマを釈放
飛行させて印字するスプリングチャージ式印字ハンマで
は、図3に示すように、従来よりフロントヨーク14の
前面には、用紙屑、リボン屑等が印字ハンマ部に入り込
むのを防止するためリボンシールドプレート12を装着
していた。
2. Description of the Related Art A leaf spring printing hammer is held at a non-printing position by, for example, a magnetic attraction force of a magnet 2, and a releasing current having a predetermined pulse width is supplied to a releasing electromagnetic coil 7 (hereinafter simply referred to as a coil). In the spring-charge type printing hammer which prints by releasing the printing hammer, as shown in FIG. 3, in order to prevent paper scraps, ribbon scraps, etc. from entering the printing hammer part on the front surface of the front yoke 14 conventionally. The ribbon shield plate 12 was attached.

【0003】[0003]

【発明が解決しようとする課題】しかし、上記した従来
のハンマ機構部には次のような問題がある。
However, the above-mentioned conventional hammer mechanism section has the following problems.

【0004】通常のリボンシールドプレート12は薄板
からなるため、組立作業においてゆがみ、ソリ等が発生
し生産性を妨げている。また、ゆがみ等があるとリボン
8の走行の抵抗が大きくなり、リボン走行が不安定とな
り印字品質が低下することになる。更に、薄板のため、
管理しにくい問題がある。
Since the ordinary ribbon shield plate 12 is made of a thin plate, it is distorted and warped during the assembling work to hinder productivity. Further, if there is a distortion or the like, the resistance of the ribbon 8 to run becomes large, and the ribbon running becomes unstable and the printing quality deteriorates. Furthermore, because of the thin plate,
There is a problem that is difficult to manage.

【0005】本発明の目的は、上記した従来技術の欠点
をなくし、リボンシールドプレート12を削除しても印
字ハンマ部に用紙屑、リボン屑が入り込むのを防止し印
字品質の低下を防止するものである。
An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and prevent paper dust and ribbon dust from entering the print hammer portion even if the ribbon shield plate 12 is deleted, thereby preventing deterioration of print quality. Is.

【0006】[0006]

【課題を解決するための手段】上記した目的を達成する
ために、本発明は、各印字ハンマのフロントヨーク14
部において印字側と吸引側で、そのフロントヨーク14
の穴の大きさを印字側が吸引側よりも小さくなるように
したことを特徴とするものである。
In order to achieve the above object, the present invention provides a front yoke 14 of each printing hammer.
Front yoke 14 on the printing side and suction side
Is characterized in that the size of the hole is smaller on the printing side than on the suction side.

【0007】[0007]

【作用】上記構成によれば、リボンシールドプレート1
2がなくても印字ハンマ部に用紙屑、リボン屑が入るの
を防止できる。またその部品がなくなるので、管理が容
易となり組立性が向上する。
According to the above construction, the ribbon shield plate 1
It is possible to prevent paper scraps and ribbon scraps from entering the printing hammer portion without the use of the two. Further, since the parts are eliminated, the management becomes easy and the assemblability is improved.

【0008】[0008]

【実施例】以下実施例図面を参照して本発明を説明す
る。
The present invention will be described below with reference to the accompanying drawings.

【0009】図1は本発明印字ハンマの側面図を示すも
ので、印字ハンマは磁気回路を構成するヨーク1、ヨー
クベース3、フロントヨーク4、磁気を発生するマグネ
ット2、印字をつかさどる印字ピン6、印字エネルギを
バネのたわみとして蓄えるための板バネ5、マグネット
2の磁気を打ち消し板バネ5を飛翔させ印字ピン6によ
りドットを形成させるためのコイル7、及びインクリボ
ン8と印字用紙10の間にあり印字用紙10に余分なイ
ンクを付けないためのリボンセパレータ9により構成さ
れている。
FIG. 1 is a side view of a printing hammer according to the present invention. The printing hammer comprises a yoke 1 constituting a magnetic circuit, a yoke base 3, a front yoke 4, a magnet 2 for generating magnetism, and a printing pin 6 for controlling printing. A leaf spring 5 for storing printing energy as a flexure of the spring, a coil 7 for canceling the magnetism of the magnet 2 and causing the leaf spring 5 to fly to form dots by the printing pin 6, and between the ink ribbon 8 and the printing paper 10. The ribbon separator 9 is provided to prevent excess ink from being applied to the printing paper 10.

【0010】以上からなる印字ハンマにおいて、図2に
示す如くフロントヨーク4において印字側と吸引側で穴
の大きさを印字側が吸引側よりも小さくなるように構成
する。ただし、印字ハンマが動作すべき領域は確保す
る。
In the printing hammer constructed as described above, as shown in FIG. 2, the size of the holes on the printing side and the suction side of the front yoke 4 is made smaller on the printing side than on the suction side. However, the area where the print hammer should operate is secured.

【0011】以上のように構成することにより、従来の
リボンシールドプレート12の機能をフロントヨーク4
に持たせることができる。この結果、リボンシールドプ
レート12を削除でき構成部品を少なくできると共に安
価にできる。
With the above configuration, the function of the conventional ribbon shield plate 12 is made to function as the front yoke 4.
Can be held by As a result, the ribbon shield plate 12 can be eliminated, the number of components can be reduced, and the cost can be reduced.

【0012】また、上記の実施例ではフロントヨーク4
を一体ものとしたが、薄板を重ね合わせた積層構造とし
ても同様の効果が得られる。
Further, in the above embodiment, the front yoke 4
However, the same effect can be obtained with a laminated structure in which thin plates are stacked.

【0013】[0013]

【発明の効果】以上詳述したように、本発明によれば、
フロントヨークの印字側の穴径を、吸引側の穴径よりも
小さくしたことによりリボンシールドプレートを削除す
ることが可能となるので、廉価な印字ハンマを提供する
ことができる。
As described in detail above, according to the present invention,
By making the hole diameter on the print side of the front yoke smaller than the hole diameter on the suction side, the ribbon shield plate can be removed, so that an inexpensive print hammer can be provided.

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

【図1】 本発明のドットラインプリンタに使用される
印字ハンマの一実施例を示す側面断面図である。
FIG. 1 is a side sectional view showing an embodiment of a printing hammer used in a dot line printer of the present invention.

【図2】 図1の主要部の側面断面図である。FIG. 2 is a side sectional view of a main part of FIG.

【図3】 従来例を示す側面断面図である。FIG. 3 is a side sectional view showing a conventional example.

【図4】 図3の主要部の側面断面図である。FIG. 4 is a side sectional view of a main part of FIG.

【符号の説明】[Explanation of symbols]

1はヨーク、2はマグネット、3はヨークベース、4、
14はフロントヨーク、5は板バネ、6は印字ピン、7
はコイル、8はインクリボン、9はリボンセパレータ、
10は印字用紙、11はプラテンを示す。
1 is a yoke, 2 is a magnet, 3 is a yoke base, 4,
14 is a front yoke, 5 is a leaf spring, 6 is a printing pin, 7
Is a coil, 8 is an ink ribbon, 9 is a ribbon separator,
Reference numeral 10 is a printing paper, and 11 is a platen.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 自由端全面に印字ピンが装着され、固定
端がヨークベースに固着された板バネと、該板バネの自
由端後面に対向したポール部を有するヨークと、該ヨー
クとヨークベースとの間に設けられた永久磁石と、該板
バネの全面に磁気回路を形成するためのフロントヨーク
を有し、前記ポール部近傍のコムヨーク外周に釈放用コ
イルとを有する印字ハンマ機構であって、前記フロント
ヨークにある印字ピンの動作するための穴の形状を、吸
引側より印字側を小さくしたことを特徴とする印字ハン
マ機構。
1. A leaf spring in which a printing pin is mounted on the entire free end and a fixed end is fixed to a yoke base, a yoke having a pole portion facing the rear surface of the free end of the leaf spring, and the yoke and the yoke base. A printing hammer mechanism having a permanent magnet provided between the magnet and a leaf spring, a front yoke for forming a magnetic circuit on the entire surface of the leaf spring, and a release coil on the outer circumference of the comb yoke near the pole portion. A printing hammer mechanism characterized in that a shape of a hole for operating a printing pin on the front yoke is smaller on a printing side than on a suction side.
【請求項2】 前記フロントヨークを積層にして印字側
の穴の形状を小さくしたことを特徴とする請求項1記載
の印字ハンマ機構。
2. The printing hammer mechanism according to claim 1, wherein the front yoke is laminated to reduce the shape of the hole on the printing side.
JP7727894A 1994-04-15 1994-04-15 Printing hammer mechanism Pending JPH07276674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7727894A JPH07276674A (en) 1994-04-15 1994-04-15 Printing hammer mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7727894A JPH07276674A (en) 1994-04-15 1994-04-15 Printing hammer mechanism

Publications (1)

Publication Number Publication Date
JPH07276674A true JPH07276674A (en) 1995-10-24

Family

ID=13629405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7727894A Pending JPH07276674A (en) 1994-04-15 1994-04-15 Printing hammer mechanism

Country Status (1)

Country Link
JP (1) JPH07276674A (en)

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