JPH02289360A - Printing head - Google Patents
Printing headInfo
- Publication number
- JPH02289360A JPH02289360A JP11443690A JP11443690A JPH02289360A JP H02289360 A JPH02289360 A JP H02289360A JP 11443690 A JP11443690 A JP 11443690A JP 11443690 A JP11443690 A JP 11443690A JP H02289360 A JPH02289360 A JP H02289360A
- Authority
- JP
- Japan
- Prior art keywords
- ring member
- armature
- leaf spring
- outer ring
- armature holder
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 4
- 230000004907 flux Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000003801 milling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
Landscapes
- Impact Printers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明はドツトプリンタ用印字ヘッド、特にアーマチ
ュアホルダの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in print heads for dot printers, particularly in armature holders.
［従来の技術］
第１図に、１本の印字ワイヤとこの印字ワイヤを即動す
る電磁石の構造を側面図で略示しである。[Prior Art] FIG. 1 is a side view schematically showing the structure of one printing wire and an electromagnet that moves the printing wire.
第１図において、符号１で示す印字ワイヤは、短冊形の
アーマチュア２の半径方向内側に基部が固着され、アー
マチュア２はその半径方向外側に自由端部が固着された
板ばね４を介してアーマチュアホルダ３に揺動自在に取
付けられている。In FIG. 1, the printing wire designated by reference numeral 1 has its base fixed to the radially inner side of a rectangular armature 2, and the armature 2 is connected to the armature via a leaf spring 4 whose free end is fixed to the radially outer side. It is swingably attached to the holder 3.
一方、前記アーマチュア２を磁気吸着自在としたコア５
は、Ｕ字形の磁性材製品であって、放射状に配列された
ときに半径方向内側となる一方の脚部５Ａに電磁コイル
６を巻付けてあり、半径方向外側となる他方の脚部５Ｂ
には永久磁石７を組込んである。On the other hand, a core 5 that can freely magnetically attract the armature 2
is a U-shaped magnetic material product in which an electromagnetic coil 6 is wound around one leg 5A that is radially inner when arranged radially, and the other leg 5B that is radially outer.
A permanent magnet 7 is incorporated in the magnet.
永久磁石７は、常時、アーマチュア２をコア５の脚部５
Ａの磁極面５ａに磁気吸引する方向の磁場を形成してい
るが電磁コイル６に所定の電圧を印加すると前記永久磁
石７の磁束を打消す方向の磁束Φが流れ、解磁状態とな
ったアーマチュア２が、板ばね４の弾発的復元力によっ
てコア５の脚部５Ａの磁極面５ａから離れる。The permanent magnet 7 always connects the armature 2 to the leg 5 of the core 5.
A magnetic field is formed in the direction of magnetic attraction to the magnetic pole surface 5a of A, but when a predetermined voltage is applied to the electromagnetic coil 6, a magnetic flux Φ flows in a direction that cancels the magnetic flux of the permanent magnet 7, resulting in a demagnetized state. The armature 2 separates from the magnetic pole face 5a of the leg portion 5A of the core 5 due to the elastic restoring force of the leaf spring 4.
電磁コイル６への電圧印加を停止すると、アーマチュア
２が瞬時にコア５の磁極面５ａに向けて永久磁石７の磁
気により吸引される。When the voltage application to the electromagnetic coil 6 is stopped, the armature 2 is instantly attracted toward the magnetic pole surface 5a of the core 5 by the magnetism of the permanent magnet 7.
ところで５複数のアーマチュア２を放射状に配列してそ
れぞれ揺動自在に支持している前記アーマチュアホルダ
３は従来、第２図に拡大背面図で示し、第３図に第２図
ｍ矢視図で示しであるように、環板状の部材であって、
外周にフランジ３Ａを形成し、フランジ３Ａの内側とな
る部分には、同心の環状溝８を設け、さらに、この環状
溝８の内側となる部分には放射状配列の側磁路部９が形
成されている。By the way, the armature holder 3 in which a plurality of armatures 2 are radially arranged and swingably supported is conventionally shown in FIG. 2 as an enlarged rear view, and as shown in FIG. As shown, it is an annular plate-shaped member,
A flange 3A is formed on the outer periphery, and a concentric annular groove 8 is provided in the inner part of the flange 3A, and a radially arranged side magnetic path part 9 is formed in the inner part of the annular groove 8. ing.
前記フランジ３Ａには２４等角度分配配置でねじ孔１０
を同一円周上に設けてあり、このねじ孔１０に対応する
側磁路部９間には前記アーマチュア２が遊嵌する軸線方
向片側に開口した放射状配列の７／Ｉｌｌを有する。The flange 3A has 24 screw holes 10 arranged at equal angles.
are provided on the same circumference, and between the side magnetic path portions 9 corresponding to the screw holes 10, there is a radially arranged 7/Ill opening on one side in the axial direction into which the armature 2 is loosely fitted.
前記フランジ３Ａの背面３ａには前記板ばね４の基部を
、ねじ孔１０に螺合するビス１２によりそれぞれ固定し
、溝１１には前記板ばね４に支持したアーマチュア２の
一部が遊嵌する。The bases of the leaf springs 4 are fixed to the back surface 3a of the flange 3A with screws 12 that are screwed into screw holes 10, and a part of the armature 2 supported by the leaf spring 4 is loosely fitted into the groove 11. .
前記アーマチュア２の半径方向内側に基部が固着されて
いる印字ワイヤ１は、中心部の孔１３を通じて前方に突
出し、先端が（図示せぬ）インクリボンを介して（図示
せぬ）紙面と対向する。The printing wire 1 whose base is fixed to the inside of the armature 2 in the radial direction projects forward through a hole 13 in the center, and its tip faces the paper surface (not shown) via an ink ribbon (not shown). .
このような構造からなる従来の印字ヘッドは、第１図の
状態において永久磁石７の磁束がコア５の脚部５Ｂ→ア
ーマチユアホルダ３→アーマチユアホルダ３の側磁路部
９→アーマチュア２→コアの脚部５Ａを磁気回路として
流れるので、アーマチュア２はコア５の磁極面５ａに抜
ばね４の復元力に抗して磁気吸着されている。ここで、
電磁コイル６に電圧印加して永久磁石７の磁束を相殺す
る磁束Φを発生させることにより、アーマチュア２は板
ばね４の復元力により図中矢印方向に揺動されるので、
アーマチュア２に固着された印字ワイヤ１の先端が（図
示せぬ）インクリボンを介して（図示せぬ）紙面に点打
ちされる。In the conventional print head having such a structure, in the state shown in FIG. 2→Since the flow flows through the leg portion 5A of the core as a magnetic circuit, the armature 2 is magnetically attracted to the magnetic pole surface 5a of the core 5 against the restoring force of the extraction spring 4. here,
By applying a voltage to the electromagnetic coil 6 to generate a magnetic flux Φ that offsets the magnetic flux of the permanent magnet 7, the armature 2 is swung in the direction of the arrow in the figure by the restoring force of the leaf spring 4.
The tip of the printing wire 1 fixed to the armature 2 is dotted onto a paper surface (not shown) via an ink ribbon (not shown).
［発明が解決しようとする課題］
ところでこのような従来の印字ヘッドでは、アーマチュ
アホルダ３の製造方法が、溝１１をフライス加工するこ
とにより側磁路部９を形成する工程と、板ばね４の基部
を固着するためにフランジ３Ａの背面３ａを均一に仕上
げる工程とを必要とする。したがって、前者の工程では
非能率的で生産性が悪く印字ヘッドを安価に提供できな
い、また後者の工程では、板ばね４の取付面となる背面
３ａより側磁路部９が高くその背面３ａを研削すること
が困難であった。[Problems to be Solved by the Invention] In such a conventional print head, the method for manufacturing the armature holder 3 includes a step of forming the side magnetic path portion 9 by milling the groove 11, and a step of forming the side magnetic path portion 9 by milling the groove 11. In order to fix the base, a step of uniformly finishing the back surface 3a of the flange 3A is required. Therefore, the former process is inefficient, has poor productivity, and cannot provide a print head at a low price, and in the latter process, the side magnetic path portion 9 is higher than the back surface 3a, which is the mounting surface of the leaf spring 4. It was difficult to grind.
また、アーマチュアホルダ３の環状溝８外側に環状の段
差部３ｂを形成し背面３ａにビス１２で固定される板ば
ね４がこの環状の段差部３ｂを支点として弾性変形する
ため、環状の段差部３ｂと当接する板ばね４の短辺側両
端に応力が集中してしまい、この板ばね４の耐久性が悪
いという問題点があった。Further, an annular stepped portion 3b is formed on the outside of the annular groove 8 of the armature holder 3, and the leaf spring 4 fixed to the back surface 3a with a screw 12 is elastically deformed using this annular stepped portion 3b as a fulcrum. There was a problem in that stress was concentrated on both ends of the short side of the leaf spring 4 that came into contact with the leaf spring 3b, and the durability of the leaf spring 4 was poor.
この発明では、アーマチュアホルダの生産性を向上する
ことにより印字ヘッドを安価に提供することを目的とす
る。The present invention aims to provide a print head at a low cost by improving the productivity of the armature holder.
［課題を解決するための手段］
このような目的を達成するために、この発明では、アー
マチュアホルダを板ばねの基部を取付けるねじ孔が穿設
された外環部材とねじ孔に対応して軸線方向両側に開口
した放射状の溝が形成された内環部材とで構成し、外環
部材に前記板ばねの支点となる多角形状の段差部を形成
したことを特徴とする。[Means for Solving the Problems] In order to achieve such an object, in the present invention, the armature holder is aligned with the outer ring member in which the screw hole for attaching the base of the leaf spring is formed, and the axis line corresponding to the screw hole. It is characterized by comprising an inner ring member in which radial grooves are formed that are open on both sides in the direction, and a polygonal stepped portion serving as a fulcrum of the leaf spring is formed in the outer ring member.
［作 用］
アーマチュアホルダは、外環部材と内環部材との２部材
から構成し、まずこれら部材を別個にプレス成形により
半完成品として製作しておく、そして、外環部材は、ね
じ孔と多角形状の段差部を形成してから板ばねの取付面
の研削加工をする。[Function] The armature holder is composed of two members, an outer ring member and an inner ring member. First, these members are separately press-molded as a semi-finished product. Then, the outer ring member is made of a screw hole. After forming a polygonal stepped portion, the mounting surface of the leaf spring is ground.
また内環部材は、軸線方向両側に開口した溝間の側磁路
部をプレス成形により張出す、このようにして完成され
た外・内環部材を同心に嵌合同着することにより、アー
マチュアホルダが製作される。In addition, the inner ring member is made by press-molding the side magnetic path portion between the grooves that are open on both sides in the axial direction, and by fitting and bonding the outer and inner ring members completed in this way concentrically, the armature holder is assembled. is produced.
［実施例］
以下、この発明の印字ヘッドの実施例を説明するが、要
部となるアーマチュアホルダのみ説明して、その他の構
成・作用は従来の印字ヘッドと同じであるからその説明
は省略する。[Example] An example of the print head of the present invention will be described below, but only the armature holder, which is the main part, will be explained, and the other configurations and functions are the same as those of the conventional print head, so the explanation thereof will be omitted. .
第４図にはこの発明の印字ヘッドのアーマチュアホルダ
を縦断側面図で示し、第５図には背面図で示しである。FIG. 4 shows the armature holder of the print head of the present invention in a longitudinal sectional side view, and FIG. 5 shows it in a rear view.
この発明では、第２図・第３図において符号３Ａで示し
たフランジを形成するための外環部材Ａと、符号１１で
示したアーマチュア２が遊嵌される溝を形成するための
内環部材Ｂとを別個１こ、例えばプレス成形により製作
しておき、これら外環部材Ａと内環部材Ｂを一体に同心
嵌合して固着することにより製品アーマチュアホルダ３
′とする。In this invention, an outer ring member A for forming a flange shown by reference numeral 3A in FIGS. 2 and 3, and an inner ring member for forming a groove into which the armature 2 shown by reference numeral 11 is loosely fitted. The product armature holder 3 is manufactured by separately manufacturing the outer ring member A and the inner ring member B by, for example, press molding, and then concentrically fitting and fixing the outer ring member A and the inner ring member B together.
'.
外環部材Ａは２４等角度分割位置にねじ孔１０を設け、
正面側と背面側の内縁部に２４角形をなす切欠段部１３
と１４を形成しである。The outer ring member A has screw holes 10 at 24 equal angle division positions,
Notch step portions 13 forming a 24-gon shape on the inner edges of the front side and the back side
and 14.
一方、内環部材Ｂは前記外環部材Ａのねじ孔１０に対応
した２４条の軸線方向両側に開口した溝１１を形成し、
かつ、前記外環部材Ａの切欠段部１３に嵌合する切欠段
部１５を有する外フランジ部１６と、外環部材Ａの背面
ａよりも背後方向に肉厚の１／２程度背面すの位置が張
出すようテーパ部１７で連結した側磁路部１８とを有し
てなり。On the other hand, the inner ring member B forms 24 grooves 11 that are open on both sides in the axial direction and correspond to the screw holes 10 of the outer ring member A,
In addition, an outer flange portion 16 having a notch step portion 15 that fits into the notch step portion 13 of the outer ring member A, and a back surface of about 1/2 of the wall thickness in the rear direction from the back surface a of the outer ring member A. It has a side magnetic path part 18 connected by a tapered part 17 so that the position is extended.
前記溝１１は外フランジ部１６の一部からテーパ部１７
と側磁路部１８に亘って形成しである。The groove 11 extends from a part of the outer flange portion 16 to a tapered portion 17.
and the side magnetic path portion 18.
なお、ねじ孔１０に螺合するビス１２により板ばね４の
基部を固定することによって、板ばね４に支持したアー
マチュア２の一部を溝１１内に遊嵌させる。このアーマ
チュア２の取付けにより印字ワイヤ１がアーマチュアホ
ルダ３′に支持されることになる。また、外環部材Ａと
内環部材Ｂは切欠段部１３，１５を多角形とすることに
より互いｌこ回り止めとし、さらに１両者の対応位置に
設けた位置決め孔１９．２０を合致させることによって
、結合位置を確認できるようにしである。Note that by fixing the base of the leaf spring 4 with a screw 12 that is screwed into the screw hole 10, a part of the armature 2 supported by the leaf spring 4 is loosely fitted into the groove 11. By attaching the armature 2, the printing wire 1 is supported by the armature holder 3'. In addition, the outer ring member A and the inner ring member B have polygonal cutout steps 13 and 15 to prevent each other from rotating, and furthermore, the positioning holes 19 and 20 provided at corresponding positions on both parts are made to coincide with each other. This allows you to confirm the bonding position.
上述の外環部材Ａと内環部材Ｂは、ともにプレス成形し
て得ることができる形状構造であり、特に板状であるこ
とからして製品アーマチュアホルダ３′の内厚は従来の
切削、旋削加工品に較べて大幅に減少するので、材料の
歩留まりが向上するとともに、軽量化されたアーマチュ
アホルダ３゛が得られる。The above-mentioned outer ring member A and inner ring member B both have a shape structure that can be obtained by press forming, and since they are plate-shaped, the inner thickness of the product armature holder 3' can be determined by conventional cutting or turning. Since the amount is significantly reduced compared to a processed product, the material yield is improved and a lightweight armature holder 3 can be obtained.
また、フライス加工を必要とせず、板ばね４を取付ける
部分、即ち外環部材Ａの背面ａの研削が極めて容易であ
り高精度な研削を経済的に行えることになる。Further, the part to which the leaf spring 4 is attached, that is, the back surface a of the outer ring member A, can be ground very easily without the need for milling, and high-precision grinding can be performed economically.
［発明の効果］
以上の説明から明らかなように、この発明によれば、印
字ヘッドのアーマチュアホルダを板ばねの基部を取付け
るねじ孔が穿設された外環部材とそのねじ孔に対応して
軸線方向両側に開口した放射状の溝が形成された内環部
材とで構成し、外環部材に前記板ばねの支点となる多角
形状の段差部を形成したので、アーマチュアホルダの生
産性を向上することができ印字ヘッドを軽量・安価に提
供できる。[Effects of the Invention] As is clear from the above description, according to the present invention, the armature holder of the print head is connected to the outer ring member in which the screw hole for attaching the base of the leaf spring is formed, and the The armature holder is composed of an inner ring member in which radial grooves are formed that are open on both sides in the axial direction, and a polygonal stepped portion that serves as a fulcrum for the leaf spring is formed in the outer ring member, thereby improving the productivity of the armature holder. This makes it possible to provide a lightweight and inexpensive print head.
また、アーマチュアホルダのアーマチュアが遊嵌される
溝を軸線方向両側に開口した放射状の溝としたので、隣
在するアーマチュア側への永久磁石や電磁コイルの磁気
漏洩が少なく、印字ヘッドの動作特性が良好となる。In addition, since the groove into which the armature of the armature holder is loosely fitted is a radial groove with openings on both sides in the axial direction, magnetic leakage of the permanent magnet and electromagnetic coil to the adjacent armature side is reduced, and the operating characteristics of the print head are improved. Becomes good.
また更に、アーマチュアホルダに板ばねの支点となる多
角形状の段差部を形成したので、板ばねの耐久性が向上
して品質上の信頼性を高めた印字ヘッドを提供すること
ができるなどの実用上価れた効果を得ることができる。Furthermore, since the armature holder is formed with a polygonal step that serves as a fulcrum for the leaf spring, the durability of the leaf spring is improved, making it possible to provide a print head with improved quality reliability. You can get great effects.
第１図は印字ヘッドの略示側面図、第２図は従来のアー
マチュアホルダの一例を示す縦断側面図、第３図は同じ
く背面図、第４図はこの発明のアーマチュアホルダの一
例を示す縦断側面図、第５図は同゛じく背面図である０
図面において、１・・・印字ワイヤ、 ２・・・アーマ
チュア、３．３１・・アーマチュアホルダ、 ４・・・
板ばね。
５・・・コア、
６・・・電磁コイル。
７・・・永久磁石、
１０・・・ねじ孔、
・・溝、
Ａ・・・外環部材、
・・内環部材。FIG. 1 is a schematic side view of the print head, FIG. 2 is a vertical side view showing an example of a conventional armature holder, FIG. 3 is a rear view, and FIG. 4 is a vertical cross-sectional view showing an example of the armature holder of the present invention. The side view and Figure 5 are also rear views.
In the drawings, 1...printing wire, 2...armature, 3.31...armature holder, 4...
Leaf spring. 5... Core, 6... Electromagnetic coil. 7... Permanent magnet, 10... Screw hole,... Groove, A... Outer ring member,... Inner ring member.
Claims (1)
に板ばねの自由端部を固着した短冊状の複数のアーマチ
ュアと、これらアーマチュアを放射状に配列して各前記
板ばねを介して揺動自在に支持するアーマチュアホルダ
と、このアーマチュアホルダに前記板ばねの基部を介し
て固定された永久磁石と電磁コイルとを内設するコアと
を備え、前記アーマチュアの背面を前記コアの磁極面に
磁気吸着自在とするとともに、前記アーマチュアが前記
アーマチュアホルダに形成された放射状配列の側磁路部
間の溝に遊嵌されている印字ヘッドにおいて、前記アー
マチュアホルダを前記板ばねの基部を取付けるねじ孔が
穿設された外環部材と前記ねじ孔に対応して軸線方向両
側に開口した放射状の前記溝が形成された内環部材とで
構成し、前記外環部材に前記板ばねの支点となる多角形
状の段差部を形成したことを特徴とする印字ヘッド。A plurality of strip-shaped armatures having a base of a printing wire fixed to the inside in the radial direction and a free end of a leaf spring fixed to the outside in the radial direction, and these armatures are arranged radially and can swing freely via each of the leaf springs. an armature holder supported by the armature holder, and a core in which a permanent magnet and an electromagnetic coil are fixed to the armature holder via the base of the leaf spring, and the back surface of the armature is magnetically attracted to the magnetic pole surface of the core. In a print head in which the armature is loosely fitted into a groove between radially arranged side magnetic path portions formed in the armature holder, a screw hole for attaching the base of the leaf spring to the armature holder is bored. The outer ring member has a polygonal shape that serves as a fulcrum for the leaf spring, and the outer ring member has a polygonal shape that serves as a fulcrum for the leaf spring. A print head characterized by forming a stepped portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11443690A JPH02289360A (en) | 1990-04-27 | 1990-04-27 | Printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11443690A JPH02289360A (en) | 1990-04-27 | 1990-04-27 | Printing head |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15822283A Division JPS6049959A (en) | 1983-08-30 | 1983-08-30 | Manufacture of armature holder for dot printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02289360A true JPH02289360A (en) | 1990-11-29 |
| JPH0435349B2 JPH0435349B2 (en) | 1992-06-10 |
Family
ID=14637683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11443690A Granted JPH02289360A (en) | 1990-04-27 | 1990-04-27 | Printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02289360A (en) |
-
1990
- 1990-04-27 JP JP11443690A patent/JPH02289360A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0435349B2 (en) | 1992-06-10 |
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