JPH0121802Y2 - - Google Patents
Info
- Publication number
- JPH0121802Y2 JPH0121802Y2 JP13450382U JP13450382U JPH0121802Y2 JP H0121802 Y2 JPH0121802 Y2 JP H0121802Y2 JP 13450382 U JP13450382 U JP 13450382U JP 13450382 U JP13450382 U JP 13450382U JP H0121802 Y2 JPH0121802 Y2 JP H0121802Y2
- Authority
- JP
- Japan
- Prior art keywords
- hammer spring
- hammer
- yoke
- spring
- printing
- 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
- 239000002184 metal Substances 0.000 claims 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Impact Printers (AREA)
Description
【考案の詳細な説明】
本考案は例えばインパクト型ドツトプリンタに
使用される印字ハンマ駆動装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing hammer drive device used, for example, in an impact type dot printer.
ハンマスプリングを変形させることによりこの
ハンマスプリングに蓄えられる変形エネルギを印
字エネルギとする印字ハンマは、一般に非動作時
にはハンマスプリングを変形保持しておいて印字
（打撃）のためのエネルギを蓄えておき、印字時
にハンマスプリングを釈放して蓄えられたエネル
ギで印字を行うようにしたものである（以下スト
アードエナージタイプハンマという）。このよう
な方式ではハンマスプリングを変形し保持するた
めに永久磁石の磁気吸引力を用いるものがある。 Printing hammers that use deformation energy stored in the hammer spring as printing energy by deforming the hammer spring generally keep the hammer spring deformed and held when not in operation to store energy for printing (hitting). When printing, the hammer spring is released and the stored energy is used to print (hereinafter referred to as a stored energy type hammer). Some of these systems use the magnetic attraction force of a permanent magnet to deform and hold the hammer spring.
第１図は上記の例を示すものである。第１図に
おいて１は磁性体にて形成されたハンマスプリン
グであり、一端が固定され、その他端が自由端と
なし、この自由端には印字ピン２が装着されてお
り、該印字ピン２に対向してインクリボン１０及
び印字用紙１１を介してプラテン１２が配置され
ている。ハンマスプリング１の一端は永久磁石６
の前面に配設されたヨークスペーサ７に固着され
ており、自由端はその周囲に釈放用コイル５を巻
いたヨーク４にギヤツプＡを隔てて対向してい
る。又、このヨーク４はコの字形状をし、その下
端が永久磁石６の後面に設けられている。従つ
て、永久磁石６により図に示す点線Ｂの如き磁気
回路を構成し、ヨーク４のポール部の前面及びハ
ンマスプリング１の裏面との間に働く吸引力によ
り、ハンマスプリング１の自由端はヨーク４のポ
ール部に吸引保持される。この状態を第１図にお
いて２点鎖線にて示す。この時、ハンマスプリン
グ１は変形しており、変形エネルギが蓄えられ
る。 FIG. 1 shows an example of the above. In Fig. 1, reference numeral 1 denotes a hammer spring made of a magnetic material, one end of which is fixed and the other end is a free end, and a printing pin 2 is attached to this free end. A platen 12 is placed opposite to each other with an ink ribbon 10 and printing paper 11 in between. One end of the hammer spring 1 is a permanent magnet 6
The free end faces the yoke 4, which has a release coil 5 wound around it, across a gap A. Further, this yoke 4 has a U-shape, and its lower end is provided on the rear surface of the permanent magnet 6. Therefore, the permanent magnet 6 constitutes a magnetic circuit as shown by the dotted line B in the figure, and the free end of the hammer spring 1 is pulled into the yoke by the attractive force acting between the front surface of the pole portion of the yoke 4 and the back surface of the hammer spring 1. It is sucked and held by the pole part 4. This state is shown by the two-dot chain line in FIG. At this time, the hammer spring 1 is deformed and deformation energy is stored.
印字時所定のタイミングで印字指令信号がある
と、前記釈放用コイル５に所定の電流が流れる。
ヨーク４には永久磁石６の磁界と逆の磁界が発生
して打ち消し合い、ギヤツプＡの部分の磁束が減
少し吸引保持力がハンマスプリング１の変形力よ
りも小さくなる。従つてハンマスプリング１はヨ
ーク４の先端を離れ、インクリボン１０と印字用
紙１１を介してプラテン１２に衝突し、印字用紙
１１上にドツトが印字される。衝突後、釈放用コ
イル５に流れる電流が切れると、ギヤツプＡの部
分の磁束が元の値に戻り、吸引保持力が前記変形
力よりも上まわり、ハンマスプリング１は再びヨ
ーク４のポール部に吸引保持され、１回の印字動
作が終了する。尚、永久磁石６はハンマスプリン
グ１を吸引保持できるだけの磁束を発生する必要
があり、ギヤツプＡと永久磁石６による磁気吸引
力及びハンマスプリング１のスプリング力の関係
図を第２図に示す。 When a print command signal is received at a predetermined timing during printing, a predetermined current flows through the release coil 5.
A magnetic field opposite to the magnetic field of the permanent magnet 6 is generated in the yoke 4 and cancel each other out, so that the magnetic flux at the gap A decreases and the attraction and holding force becomes smaller than the deforming force of the hammer spring 1. Therefore, the hammer spring 1 leaves the tip of the yoke 4 and collides with the platen 12 via the ink ribbon 10 and printing paper 11, so that a dot is printed on the printing paper 11. After the collision, when the current flowing through the release coil 5 is cut off, the magnetic flux in the gap A returns to its original value, the attraction and holding force exceeds the deformation force, and the hammer spring 1 is again attached to the pole of the yoke 4. It is held under suction and one printing operation is completed. The permanent magnet 6 must generate enough magnetic flux to attract and hold the hammer spring 1, and a relationship between the gap A, the magnetic attraction force of the permanent magnet 6, and the spring force of the hammer spring 1 is shown in FIG.
従来のストアードエナージタイプハンマにおい
ては前記ヨーク４はケイソ鋼、そして前記ハンマ
スプリング１は炭素工具鋼等の磁性材より構成さ
れており、両部品が直接接触してギヤツプＡが０
の状態でハンマスプリング１がヨーク４のポール
部に吸引保持されている。ハンマスプリング１の
スプリング力はギヤツプＡの変化に対して第２図
の如く直線的に変化するが、永久磁石６の磁気吸
引力はギヤツプ０の近辺においては図示の如く双
曲線的に増加する。従つて、磁気吸引力とスプリ
ング力の差Ｐ（以下余剰吸引力という）が必要以
上に大きくなつている。これが大きいと永久磁石
６による吸引磁束を打ち消すべき釈放用コイル５
に流す電流を大きくする必要がある。このため消
費電力が大となり不経済であると同時にコイル温
度上昇も大きくなり高速化が難しいという欠点が
ある。又前記余剰吸引力Ｐの値が大きいと印字指
令を受け、釈放用コイル５に電流を流しハンマス
プリング１がヨーク４より離れるまでの時間が長
くなる。すなわち、ハンマスプリング１の１サイ
クル時間が長くなり、高速化において問題となつ
ている。さらに、ハンマスプリング１、ヨーク４
の接触面に何らの耐摩耗向上の対策を施していな
いので、前記両部品の吸着面が摩耗し、その結果
ハンマスプリング１の変形たわみ量が増大して変
形エネルギーが大きくなり、その結果印字ピン２
の打撃力が過大となり、印字用紙１１に穴明等の
印字不良が発生しなおかつインクリボン１０の寿
命が短かくなる等の障害が発生している。 In a conventional stored energy type hammer, the yoke 4 is made of silica steel, and the hammer spring 1 is made of a magnetic material such as carbon tool steel.
In this state, the hammer spring 1 is suctioned and held by the pole portion of the yoke 4. The spring force of the hammer spring 1 varies linearly as the gap A changes as shown in FIG. 2, but the magnetic attraction force of the permanent magnet 6 increases hyperbolically in the vicinity of the gap 0 as shown in the figure. Therefore, the difference P between the magnetic attraction force and the spring force (hereinafter referred to as surplus attraction force) is larger than necessary. If this is large, the release coil 5 should cancel the magnetic flux attracted by the permanent magnet 6.
It is necessary to increase the current flowing through the This has the disadvantage that power consumption is large, making it uneconomical, and at the same time, the temperature of the coil increases, making it difficult to increase the speed. Furthermore, if the value of the surplus attraction force P is large, the time it takes for the hammer spring 1 to separate from the yoke 4 after receiving a print command and for applying current to the release coil 5 becomes longer. In other words, the time required for one cycle of the hammer spring 1 becomes longer, which poses a problem in increasing speed. Furthermore, hammer spring 1, yoke 4
Since no measures have been taken to improve wear resistance on the contact surfaces of the two parts, the suction surfaces of both parts will wear out, and as a result, the amount of deformation and deflection of the hammer spring 1 will increase, and the deformation energy will increase.As a result, the printing pin 2
The striking force of the ink ribbon becomes excessive, causing problems such as printing defects such as holes in the printing paper 11 and shortening the life of the ink ribbon 10.
本考案の目的は、上記した従来技術の欠点をな
くすべき、耐摩耗性を向上させ、かつ消費電力を
減少させてドツトプリンタの高速化及びコスト低
減を計ると同時に印字品質を常に良好な状態に維
持し、併せてインクリボンの寿命をのばすことで
ある。 The purpose of this invention is to eliminate the above-mentioned drawbacks of the conventional technology, improve wear resistance, reduce power consumption, speed up the dot printer, reduce cost, and at the same time maintain good print quality at all times. At the same time, the purpose is to extend the life of the ink ribbon.
本考案はハンマスプリングとヨークの吸着面間
耐摩耗性に富む非磁性体をコーテングすることに
より、耐摩耗性を向上させると同時に吸引保持の
状態においても適切なエアギヤツプが形成されて
磁束の切れが良くなるように両吸着面部に工夫を
こらしたものである。 This invention improves wear resistance by coating the attraction surfaces of the hammer spring and yoke with a non-magnetic material that is highly wear resistant. At the same time, an appropriate air gap is formed even in the suction and hold state, preventing magnetic flux from breaking. Both suction surfaces have been devised to improve the performance.
従来の他のハンマ機構において使用されている
レシジユアルと呼ばれているゴム弾性体を非磁性
体としてハンマスプリング１とヨーク４の間に設
けることは次の理由により好ましくない。すなわ
ちストアードエナージタイプハンマにおいては、
吸引保持時のエアギヤツプとして15〜25μｍ程度
が永久磁石６の磁気吸引力より限界である。従つ
て、ゴム弾性体の厚みが必然的に15〜25μｍとな
り薄いものとなる。このような薄い膜厚ではゴム
弾性体の寿命が短かくハンマ駆動装置としての所
要の目標を達成することができない。 It is not preferable to provide a non-magnetic rubber elastic body called a residual, which is used in other conventional hammer mechanisms, between the hammer spring 1 and the yoke 4 for the following reason. In other words, in a stored energy type hammer,
Due to the magnetic attraction force of the permanent magnet 6, the air gap during attraction and holding is approximately 15 to 25 μm. Therefore, the thickness of the rubber elastic body is inevitably 15 to 25 μm, which is thin. With such a thin film thickness, the life of the rubber elastic body is short and the desired goal of the hammer driving device cannot be achieved.
そこで本考案は非磁性体として硬質クロム等の
耐摩耗性の良いものを使用する。本考案の具体的
一実施例を第３図及び第４図に示す。ハンマスプ
リング１のヨーク側の裏面にヨーク４の吸着部Ｑ
の高さl1より少し長めの部分的硬質クロムをメツ
キする（第４図Ｓ部のl2）。これはハンマスプリ
ング１のヨーク側全面をメツキすることはハンマ
スプリング１の炭素工具鋼の材料強度が劣化して
もろくなり切損等の危険があるからである。さら
に部分的なメツキにおいてもメツキ膜厚は耐摩耗
性上必要な５〜10μｍの厚さとする。次にヨーク
４の吸着部Ｑにも第３図に示す如く硬質クロムを
メツキする。この時ヨーク４のメツキ膜厚は適切
なエアギヤツプ量15〜25μｍよりハンマスプリン
グ１のメツキ厚を差しひいた10〜15μｍとする。
こうすることによりハンマスプリング１がヨーク
４に吸引保持された時、15〜25μｍのエアギヤツ
プＡが形成されることになる。又、両部品の吸着
面部（第３図Ｑ及び第４図Ｓ部）は耐摩耗性のよ
い硬質クロムにより覆われることになる。 Therefore, in the present invention, a material with good wear resistance, such as hard chromium, is used as the non-magnetic material. A specific embodiment of the present invention is shown in FIGS. 3 and 4. The suction part Q of the yoke 4 is on the back side of the yoke side of the hammer spring 1.
Plate a portion of hard chrome a little longer than the height l 1 (l 2 in part S in Figure 4). This is because if the entire surface of the hammer spring 1 on the yoke side is plated, the strength of the carbon tool steel of the hammer spring 1 will deteriorate and become brittle, creating a risk of breakage. Furthermore, even in the case of partial plating, the plating film thickness is set to a thickness of 5 to 10 μm, which is necessary for wear resistance. Next, the suction portion Q of the yoke 4 is also plated with hard chrome as shown in FIG. At this time, the plating thickness of the yoke 4 is set to 10 to 15 μm, which is calculated by subtracting the plating thickness of the hammer spring 1 from the appropriate air gap amount of 15 to 25 μm.
By doing this, when the hammer spring 1 is attracted and held by the yoke 4, an air gap A of 15 to 25 μm is formed. In addition, the suction surface portions of both parts (section Q in FIG. 3 and section S in FIG. 4) are covered with hard chrome having good wear resistance.
その結果、第２図に示す如く余剰吸引力がP′と
なり、従来の約1/3となる。こうなることにより
釈放用コイル５に流れる電流を小さくでき、かつ
ハンマ１のリピータビリテイも短かくなる。又ハ
ンマスプリング１とヨーク４の吸着部の摩耗も防
止できる。 As a result, as shown in FIG. 2, the surplus suction force becomes P', which is about 1/3 of the conventional force. As a result, the current flowing through the release coil 5 can be reduced, and the repeatability of the hammer 1 can also be shortened. Further, wear of the attraction parts of the hammer spring 1 and the yoke 4 can also be prevented.
本考案によればハンマスプリングとポール部の
両吸着面に非磁性体で耐摩耗性のよいほぼ同じ硬
度の硬質クロムをメツキするようにしたので、前
記両吸着面の耐摩耗性を向上でき寿命を伸ばすこ
とができると共に消費電力を減少させることがで
きる。またハンマスプリング側のメツキ厚を薄く
したので、ハンマスプリングの動作時に剥離する
恐れが少なくなり寿命を更に伸ばすことが可能と
なる。この結果、ドツトプリンタの高速化及び製
造コストの低減が可能となる等の効果を奏し得
る。 According to the present invention, both the attraction surfaces of the hammer spring and the pole part are plated with hard chromium, which is a non-magnetic material and has good wear resistance and has approximately the same hardness, so the wear resistance of both attraction surfaces can be improved and the service life can be improved. It is possible to extend the power consumption and reduce power consumption. Furthermore, since the thickness of the plating on the hammer spring side is made thinner, there is less risk of the hammer spring peeling off during operation, making it possible to further extend its life. As a result, it is possible to achieve effects such as increasing the speed of the dot printer and reducing manufacturing costs.
第１図は従来一般のストアードエナージタイプ
ハンマ駆動装置を示す横断面図、第２図はストア
ードエナージタイプハンマのカー変化特性説明
図、第３図は本考案によるヨークを示す斜視図、
第４図は本案によるハンマスプリングを示す背面
図及び側面図である。
図において、１はハンマスプリング、２は印字
ピン、Ｑはヨークにおける非磁性体コーテイング
エリア、Ｓはハンマスプリングにおける非磁性体
コーテイングエリアである。
FIG. 1 is a cross-sectional view showing a conventional general stored energy type hammer drive device, FIG. 2 is an explanatory diagram of Kerr change characteristics of a stored energy type hammer, and FIG. 3 is a perspective view showing a yoke according to the present invention.
FIG. 4 is a rear view and a side view of the hammer spring according to the present invention. In the figure, 1 is a hammer spring, 2 is a printing pin, Q is a non-magnetic coating area on the yoke, and S is a non-magnetic coating area on the hammer spring.
Claims (1)
永久磁石を含み、下端においてハンマスプリング
の固定端を装着固定し、上端においてハンマスプ
リングを吸引保持するポール部を有する磁気回路
構造と、前記ポール部に巻回された釈放用電磁コ
イルを有する印字ハンマ駆動装置であつて、 前記ハンマスプリング及びポール部の相対向す
る夫々の吸着面に非磁性金属をメツキすると共に
ハンマスプリングにメツキされる膜厚をポール部
にメツキされる膜厚より薄くしたことを特徴とす
る印字ハンマ駆動装置。[Scope of Claim for Utility Model Registration] A magnetic circuit structure that includes a hammer spring with a printing pin attached to the front and a permanent magnet, has a lower end to which the fixed end of the hammer spring is attached and fixed, and an upper end that has a pole part that attracts and holds the hammer spring. and a printing hammer drive device having a releasing electromagnetic coil wound around the pole part, wherein the opposing attracting surfaces of the hammer spring and the pole part are plated with a non-magnetic metal, and the hammer spring is plated with a non-magnetic metal. A printing hammer drive device characterized in that the thickness of the film plated on the pole portion is thinner than the thickness of the film plated on the pole portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13450382U JPS5938058U (en) | 1982-09-03 | 1982-09-03 | Printing hammer drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13450382U JPS5938058U (en) | 1982-09-03 | 1982-09-03 | Printing hammer drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5938058U JPS5938058U (en) | 1984-03-10 |
| JPH0121802Y2 true JPH0121802Y2 (en) | 1989-06-28 |
Family
ID=30303048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13450382U Granted JPS5938058U (en) | 1982-09-03 | 1982-09-03 | Printing hammer drive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5938058U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790674A (en) * | 1987-07-01 | 1988-12-13 | Printronix, Inc. | Impact printer having wear-resistant platings on hammer springs and pole piece tips |
-
1982
- 1982-09-03 JP JP13450382U patent/JPS5938058U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5938058U (en) | 1984-03-10 |
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