JPH028768Y2 - - Google Patents
Info
- Publication number
- JPH028768Y2 JPH028768Y2 JP16836583U JP16836583U JPH028768Y2 JP H028768 Y2 JPH028768 Y2 JP H028768Y2 JP 16836583 U JP16836583 U JP 16836583U JP 16836583 U JP16836583 U JP 16836583U JP H028768 Y2 JPH028768 Y2 JP H028768Y2
- Authority
- JP
- Japan
- Prior art keywords
- armature
- leaf spring
- dot
- spring
- tongue piece
- 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.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 5
- 210000002105 tongue Anatomy 0.000 description 32
- 230000000694 effects Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 210000005182 tip of the tongue Anatomy 0.000 description 1
Landscapes
- Impact Printers (AREA)
Description
【考案の詳細な説明】
〔技術分野〕
本考案は、ばねやチヤージ式ドツト印字ヘツド
における板ばねの長寿命化に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to extending the life of springs and leaf springs in charge-type dot print heads.
以下に、従来のドツト印字ヘツドを図面に基づ
いて説明すると共に、その欠点を述べる。
Below, a conventional dot printing head will be explained based on the drawings, and its drawbacks will be described.
第１図は従来のドツト印字ヘツドの分解斜視
図、第２図は組立状態の部分的側断面図、第３図
は同平面図である。 FIG. 1 is an exploded perspective view of a conventional dot printing head, FIG. 2 is a partially sectional side view of the assembled state, and FIG. 3 is a plan view thereof.
１は先端で印字を行なうドツトワイヤ、２はド
ツトワイヤ１の他端を固定しているアーマチユ
ア、３は略円板状で中程に孔を有し放射状に複数
の舌片３ａを有した板ばね、３ｂは舌片３ａの中
程に形成したＨ文字状のスリツトであり、前記ア
ーマチユア２はドツトワイヤ１を該板ばね３の中
程の孔より通し舌片３ａの中央下面に配置してス
リツト３ｂで区切られる外周部において、その一
端をレーザ溶接等で舌片３ａに固定される。尚、
後記する円板状ヨークとアーマチユア２は略同一
厚さとし、このように板ばね３に固定後、各アー
マチユア２の吸引面を研摩加工等により同一高さ
にする。 1 is a dot wire whose tip performs printing; 2 is an armature that fixes the other end of the dot wire 1; 3 is a plate spring having a substantially disk shape with a hole in the middle and a plurality of radially arranged tongues 3a; 3b is an H-shaped slit formed in the middle of the tongue piece 3a. One end of the partitioned outer peripheral portion is fixed to the tongue piece 3a by laser welding or the like. still,
The disk-shaped yoke and the armature 2, which will be described later, have approximately the same thickness, and after being fixed to the leaf spring 3 in this manner, the suction surfaces of each armature 2 are made to have the same height by polishing or the like.
４は円板状ヨーク、４ａは円板状ヨーク４の中
央側に開放して収束形成した溝であり、前記板ば
ね３は該円板状ヨーク４上にアーマチユア２が溝
４ａに可動に遊嵌するように載置し、その溝４ａ
の中心方向両側においてレーザ溶接等で固定され
る。この、ドツトワイヤ１、アーマチユア２、板
ばね３、円板状ヨーク４は予じめ一体化してユニ
ツトとする。 4 is a disc-shaped yoke, 4a is a groove that is open and converges on the center side of the disc-shaped yoke 4; Place it so that it fits into the groove 4a.
It is fixed by laser welding or the like on both sides in the center direction. The dot wire 1, armature 2, leaf spring 3, and disc-shaped yoke 4 are integrated in advance to form a unit.
５は円板状のベースヨーク、６はベースヨーク
５に環状に複数固定した電磁コア、７は電磁コア
６に巻装した電磁コイル、８は電子コア６及び電
磁コイル７の外周でベースヨーク５上に固定した
リング状の永久磁石、９は永久磁石８上に固定し
たリング状のヨークであり、これ等ベースヨーク
５、電磁コア６、電磁コイル７、永久磁石８、ヨ
ーク９を予じめ一体化したユニツトとする。 5 is a disk-shaped base yoke, 6 is a plurality of electromagnetic cores fixed to the base yoke 5 in an annular shape, 7 is an electromagnetic coil wound around the electromagnetic core 6, and 8 is the outer periphery of the electronic core 6 and the electromagnetic coil 7, which is the base yoke 5. A ring-shaped permanent magnet 9 is fixed on the permanent magnet 8, and a ring-shaped yoke 9 is fixed on the permanent magnet 8. Create an integrated unit.
１０は前記アーマチユア２と電磁コア６間の間
隙を設定するために前記円板状ヨーク４とヨーク
９間に配置したスペーサ、１１は印字ヘツド部を
形成しドツトワイヤ１をガイドするガイドフレー
ム、１１ａはガイドフレーム１１のガイド孔、１
２は電磁コイル７の端子を接続して印字信号を入
力するために印字ヘツドの背部に固定する基板、
１３は前記部品を全一体に固定するクランプスプ
リングである。 10 is a spacer disposed between the disc-shaped yoke 4 and the yoke 9 to set a gap between the armature 2 and the electromagnetic core 6; 11 is a guide frame that forms a printing head portion and guides the dot wire 1; 11a is a guide frame; Guide hole of guide frame 11, 1
2 is a board fixed to the back of the print head for connecting the terminals of the electromagnetic coil 7 and inputting print signals;
Reference numeral 13 denotes a clamp spring that fixes the parts together.
次に、このように構成する印字ヘツドの印字動
作について説明する。尚、第４図の板ばね３の平
面図、第５図の印字動作前のアーマチユア２部分
の側断面図、第６図の印字時のアーマチユア２部
分の側断面図、第７図の応力分布を示す舌片３ａ
の平面図を加えて行なう。 Next, the printing operation of the print head configured as described above will be explained. 4 is a plan view of the leaf spring 3, FIG. 5 is a side sectional view of the armature 2 portion before printing operation, FIG. 6 is a side sectional view of the armature 2 portion during printing, and FIG. 7 is a stress distribution. Tongue piece 3a showing
Add a plan view.
まず、第５図に示す非印字状態について説明す
る。 First, the non-printing state shown in FIG. 5 will be explained.
電磁コイル７には通電されていないので前記に
おける永久磁石８の磁束が形成されアーマチユア
２の先部は板ばね３の弾力に打勝つて電磁コア６
上端に吸着されている。これは、スペーサ１０の
厚み分ドツトワイヤ１を吸引しているのでドツト
ワイヤ１は図示外の印字媒体から離れているので
印字は行なわれない。 Since the electromagnetic coil 7 is not energized, the magnetic flux of the permanent magnet 8 described above is formed, and the tip of the armature 2 overcomes the elasticity of the leaf spring 3 to form the electromagnetic core 6.
It is attached to the top. Since the dot wire 1 is attracted by the thickness of the spacer 10, the dot wire 1 is separated from the print medium (not shown) and no printing is performed.
この、状態はアーマチユア２と板ばね３の舌片
３ａとの固着点に偶力Ｍ（＝Ｐ・ｒ）が作用し、
アーマチユア２は前記固着点と電磁コア６の吸着
位置との間の仮想回転支点Ａを中心として、舌片
３ａの外側先端はアーマチユア２の吸引方向とは
逆の方向に撓み舌片３ａに歪みエネルギをたくわ
えた状態で保持されている。 In this state, a force couple M (=P·r) acts on the fixed point between the armature 2 and the tongue piece 3a of the leaf spring 3,
The armature 2 is centered around a virtual rotation fulcrum A between the fixed point and the adsorption position of the electromagnetic core 6, and the outer tip of the tongue piece 3a is bent in a direction opposite to the suction direction of the armature 2, so that strain energy is applied to the tongue piece 3a. It is kept in a state where it is stocked with.
次に、第６図を基に印字状態について説明す
る。 Next, the printing state will be explained based on FIG. 6.
前記、第５図における非印字状態で電磁コイル
７に所定時間通電する。すると、永久磁石８の磁
束を打消す磁束が発生し、アーマチユア２と電磁
コア６間の吸引力が無くなりアーマチユア２は板
ばね３の舌片３ａの歪みエネルギにより前方へ解
放され、前記仮想回転支点Ａを中心に回転を始め
る。 In the non-printing state shown in FIG. 5, the electromagnetic coil 7 is energized for a predetermined period of time. Then, a magnetic flux is generated that cancels the magnetic flux of the permanent magnet 8, and the attractive force between the armature 2 and the electromagnetic core 6 disappears, and the armature 2 is released forward by the strain energy of the tongue piece 3a of the leaf spring 3, and the above-mentioned virtual rotation fulcrum is released. Start rotating around A.
この時、舌片３ａの円板状ヨーク４との対向す
る面は円板状ヨーク４面が一平面からなり、かつ
この一平面に舌片３ａの支点部が固着されている
ために、舌片３ａのばね部下面はアーマチユア２
の解放に伴なつて徐々にその接触面積を増加させ
る。すなわち、舌片３ａは円板状ヨーク４上の上
面に接触しながら歪みのない状態にもどり、アー
マチユア２の先端に装着したドツトワイヤ１を駆
動して図示外の印字媒体に衝突させ印字を行なう
のである。 At this time, since the surface of the tongue piece 3a facing the disc-shaped yoke 4 is one flat surface of the disc-shaped yoke 4, and the fulcrum part of the tongue piece 3a is fixed to this one plane, The lower surface of the spring on piece 3a is armature 2.
The contact area gradually increases as the contact area is released. That is, the tongue piece 3a returns to its undistorted state while contacting the upper surface of the disc-shaped yoke 4, and drives the dot wire 1 attached to the tip of the armature 2 to collide with a print medium (not shown) to perform printing. be.
しかし、このような印字ヘツドでは次のような
欠点が生じてくる。 However, such print heads have the following drawbacks.
それは、板ばね３の舌片３ａの歪みエネルギを
印字エネルギとして使用しているので、第７図に
舌片３ａの内側端部の応力分布δで示すように舌
片３ａに形成したスリツト３ｂの外周最端部、Ｂ
において曲げ応力δ＝Ｍ／Ｚ（Ｍは偶力、Ｚは板
ばね３の２次モーメント）が最大となり、この部
分に亀裂が発生し板ばね３が折れやすいという欠
点である。 Since the strain energy of the tongue piece 3a of the leaf spring 3 is used as printing energy, the slit 3b formed on the tongue piece 3a as shown in FIG. Outermost edge, B
The bending stress δ=M/Z (M is the couple and Z is the second moment of inertia of the leaf spring 3) reaches its maximum at this point, and this is a drawback in that cracks occur in this part and the leaf spring 3 is likely to break.
本考案の目的は、板ばねを改良することにより
前記した従来の欠点を解決することにある。
The purpose of the present invention is to solve the above-mentioned conventional drawbacks by improving the leaf spring.
その、本考案の構成は次の通りである。 The configuration of the present invention is as follows.
従来同様の板ばねの各舌片において、Ｈ文字状
に形成したスリツトの外周及び内周方向の最端部
を避けた間を他より薄く平らに形成することであ
る。 In each tongue piece of a conventional leaf spring, the space between the outer periphery and the innermost end of the slit formed in the shape of an H letter is formed to be thinner and flatter than the other parts.
この、薄く形成した有効ばね部で前記した従来
例でのスリツトの外周最端部にかかる応力の負担
を軽減するのである。 This thin effective spring portion reduces the stress applied to the outermost end of the slit in the conventional example described above.
以下に、前記した目的と構成を特徴とした本考
案の一実施例を図面に基づいて説明すると共に、
その効果を述べる。尚、印字ヘツドの構造や動作
においては従来例と同様なので板ばねを主として
説明すると共に共通部位には同一符号を使用す
る。
Below, one embodiment of the present invention characterized by the above-mentioned purpose and configuration will be explained based on the drawings, and,
I will describe its effects. The structure and operation of the printing head are similar to those of the conventional example, so the leaf spring will be mainly explained and the same reference numerals will be used for common parts.
第８図は本考案の一実施例による板ばねの平面
図、第９図は第８図におけるＣ−Ｃ線断面図、第
１０図は応力分布を示す舌片の平面図である。 FIG. 8 is a plan view of a leaf spring according to an embodiment of the present invention, FIG. 9 is a sectional view taken along the line CC in FIG. 8, and FIG. 10 is a plan view of a tongue showing stress distribution.
図において、３は略円板形の板ばね、３ａは板
ばね３に放射状に形成した舌片、３ｂは各舌片３
ａに形成したＨ文字状のスリツト、３ｃは舌片３
ａのスリツト３ｂにおける外周及び内周方向の最
端部を避けた間の直線部分の舌片３ａ部分を平ら
に薄く形成した有効ばね部であり、本考案により
付加した加工部分である。この、有効ばね部３ｃ
を形成した板ばね３はエツチング形成法等によつ
て容易に製造できる。 In the figure, 3 is a substantially disk-shaped leaf spring, 3a is a tongue piece formed radially on the leaf spring 3, and 3b is each tongue piece 3.
H-shaped slit formed in a, 3c is tongue piece 3
This is an effective spring part formed by forming the tongue piece 3a, which is a straight line between the slits 3b of A and the outermost ends in the outer and inner circumferential directions, to be flat and thin, and is a processed part added according to the present invention. This effective spring portion 3c
The leaf spring 3 having the above-mentioned shape can be easily manufactured by an etching method or the like.
この、板ばね３は従来同様にドツトワイヤを有
したアーマチユアを舌片３ａの中央下面に配置し
て舌片３ａの外周方向中央で固定すると共に、自
身も従来同様に内周方向において図示外の円板状
ヨークの溝両側部において固定されるものであ
る。 This leaf spring 3 has an armature having a dot wire arranged on the lower center surface of the tongue piece 3a as in the conventional case, and is fixed at the center in the outer circumferential direction of the tongue piece 3a. It is fixed at both sides of the groove of the plate-like yoke.
次に、板ばね３の動作は従来と同様なので省略
することとし、その作用的動作について説明す
る。 Next, the operation of the leaf spring 3 will be omitted since it is the same as the conventional one, and its functional operation will be explained.
第８図に示す板ばね３の各舌片ａにおける有効
ばね部３ｃは、第９図に示す舌片３ｃの断面図の
ように他の部分と比べて薄くなつている。そし
て、この薄くしてある有効ばね部３ｃは舌片３ａ
のＨ文字状のスリツト３ｂの板ばね３における最
外周端部と最内周端部を避けた両間に形成してあ
るので、舌片３ａに生じる応力は第１０図のδで
示す応力分布のように該有効ばね部３ｃを主とし
て、その大きさに応じほぼ均一に生じている。 The effective spring portion 3c of each tongue a of the leaf spring 3 shown in FIG. 8 is thinner than other parts, as shown in the cross-sectional view of the tongue 3c shown in FIG. This thinned effective spring portion 3c is the tongue piece 3a.
Since the H-shaped slit 3b is formed between the outermost peripheral end and the innermost peripheral end of the leaf spring 3, the stress generated in the tongue piece 3a has the stress distribution shown by δ in Fig. 10. As shown in the figure, the effective spring portion 3c is formed almost uniformly depending on its size.
これは、前記従来例における第７図に述べたス
リツト３ｂの最外周端であるＢ部に生じる応力よ
りも、本考案では第１０図で示すようにスリツト
３ｃの最外周端B′部分の応力が一段と少さくな
つている。これは、有効ばね部３ｃで該B′部へ
の集中応力を吸収して、できるだけ、その部分の
応力の軽減を行なつているのである。 This is because the stress generated at the outermost edge B' of the slit 3c as shown in FIG. is getting smaller and smaller. This is because the effective spring portion 3c absorbs the concentrated stress on the B' portion and reduces the stress on that portion as much as possible.
よつて、従来同様に板ばね３の舌片３ａに応力
が生じても舌片３ａにおけるＨ文字状のスリツト
３ｃの最外周端部からの亀裂の発生を大きく低下
することができる板ばね３の長寿命化を行なうこ
とができる。 Therefore, even if stress is generated in the tongue piece 3a of the leaf spring 3 as in the conventional case, the generation of cracks from the outermost peripheral end of the H-shaped slit 3c in the tongue piece 3a can be greatly reduced. It is possible to extend the service life.
以上、詳細に説明したように本考案ではドツト
印字ヘツドにおける板ばねの各舌片のＨ文字状の
スリツトの最両端部を除いた両間を他より薄く形
成した有効ばね部としたので次のような効果を発
揮することができる。
As explained above in detail, in the present invention, the effective spring part is formed thinner than the other parts of the H-shaped slit of each tongue of the leaf spring in the dot printing head, except for the two extreme ends. It is possible to achieve similar effects.
それは、印字動作中に発生する舌片への応力を
有効ばね部に主として生じることとなるので、従
来発生した舌片のＨ文字状のスリツトの最外周部
への応力の集中を少なくすることができるので、
該部分における亀裂の発生を大きく押えることが
できるので、板ばねの長寿命化を計ることができ
る効果である。 This is because the stress on the tongue that occurs during printing operation is mainly generated in the effective spring part, so it is possible to reduce the concentration of stress on the outermost periphery of the H-shaped slit of the tongue that conventionally occurs. Because you can
Since the occurrence of cracks in this portion can be largely suppressed, this has the effect of extending the life of the leaf spring.
これは、ばねチヤージ型の印字ヘツドにおい
て、その寿命を伸ばすこととなるので有益に利用
することができる。 This can be advantageously used in spring-charged printheads as it increases their lifespan.
第１図は従来のドツト印字ヘツドの分解斜視
図、第２図は組立状態の部分的側断面図、第３図
は同平面図、第４図は板ばねの平面図、第５図は
印字動作前のアーマチユア部分の側断面図、第６
図は印字時のアーマチユア部分の側断面図、第７
図は応力分布を示す舌片の平面図であり、第８図
は本考案の一実施例による板ばねの平面図、第９
図は第８図におけるＣ−Ｃ線断面図、第１０図は
応力分布を示す舌片の平面図である。
１……ドツトワイヤ、２……アーマチユア、３
……板ばね、３ａ……舌片、３ｂ……スリツト、
３ｃ……ばね有効部、４……円板状ヨーク、４ａ
……溝、６……電磁コア、７……電磁コイル、８
……永久磁石。
Fig. 1 is an exploded perspective view of a conventional dot printing head, Fig. 2 is a partial side sectional view of the assembled state, Fig. 3 is a plan view of the same, Fig. 4 is a plan view of the leaf spring, and Fig. 5 is a printing head. Side sectional view of the armature part before operation, No. 6
The figure is a side cross-sectional view of the armature part during printing.
8 is a plan view of a tongue piece showing stress distribution, FIG. 8 is a plan view of a leaf spring according to an embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line CC in FIG. 8, and FIG. 10 is a plan view of the tongue piece showing the stress distribution. 1... Dot wire, 2... Armature, 3
...Plate spring, 3a...tongue, 3b...slit,
3c...Spring effective part, 4...Disc-shaped yoke, 4a
... Groove, 6 ... Electromagnetic core, 7 ... Electromagnetic coil, 8
……permanent magnet.
Claims (1)
分にＨ文字状のスリツトを有した板ばねの舌片の
中央下面に先部にドツトワイヤを有したアーマチ
ユアを配置し、該アーマチユアを舌片の外周方向
で舌片と固定すると共に、該板ばねを複数の放射
状の溝を有した円板状ヨークに、該板ばねが有し
たアーマチユアを円板状ヨークの溝内に可動する
ように遊嵌配置してアーマチユアを板ばねの弾力
に抗して歪みエネルギをたくわえて永久磁石の磁
束で電磁コアへと吸引しておき、該電磁コアに装
着した電磁コイルへの通電によつて永久磁石の磁
束を消去することにより前記板ばねの歪みエネル
ギによつてアーマチユアと共にドツトワイヤを駆
動して印字を行なうドツト印字ヘツドにおいて、
前記板ばねの舌片におけるＨ文字状のスリツトの
最外周端部と最内周端部を避けた両間を他より薄
く形成した有効ばね部としたことを特徴とするド
ツト印字ヘツド。 An armature having a dot wire at the tip is arranged on the lower center surface of the tongue piece of the leaf spring, which has an H-shaped slit in the central part of a plurality of tongue pieces that protrude to the outer periphery in a substantially disc shape. The plate spring is fixed to the tongue piece in the outer circumferential direction of the piece, and the plate spring is attached to a disc-shaped yoke having a plurality of radial grooves, and the armature of the plate spring is movable within the groove of the disc-shaped yoke. By arranging the armature loosely, the armature resists the elasticity of the leaf spring, stores strain energy, and attracts it to the electromagnetic core with the magnetic flux of the permanent magnet.The permanent magnet is then energized by energizing the electromagnetic coil attached to the electromagnetic core. In the dot printing head which performs printing by driving the dot wire together with the armature by the distortion energy of the leaf spring by eliminating the magnetic flux of the dot,
A dot printing head characterized in that the effective spring portion is formed thinner than the other portions between the outermost peripheral end and the innermost peripheral end of the H-shaped slit in the tongue of the leaf spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16836583U JPS6078447U (en) | 1983-11-01 | 1983-11-01 | dot printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16836583U JPS6078447U (en) | 1983-11-01 | 1983-11-01 | dot printing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6078447U JPS6078447U (en) | 1985-05-31 |
| JPH028768Y2 true JPH028768Y2 (en) | 1990-03-02 |
Family
ID=30368093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16836583U Granted JPS6078447U (en) | 1983-11-01 | 1983-11-01 | dot printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6078447U (en) |
-
1983
- 1983-11-01 JP JP16836583U patent/JPS6078447U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6078447U (en) | 1985-05-31 |
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