JPS6347635B2 - - Google Patents
Info
- Publication number
- JPS6347635B2 JPS6347635B2 JP56203274A JP20327481A JPS6347635B2 JP S6347635 B2 JPS6347635 B2 JP S6347635B2 JP 56203274 A JP56203274 A JP 56203274A JP 20327481 A JP20327481 A JP 20327481A JP S6347635 B2 JPS6347635 B2 JP S6347635B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- printing
- permanent magnet
- magnetic loop
- print head
- 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
- 239000000696 magnetic material Substances 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 9
- 238000012840 feeding operation Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000005284 excitation Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J9/00—Hammer-impression mechanisms
- B41J9/26—Means for operating hammers to effect impression
- B41J9/38—Electromagnetic means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
- Impact Printers (AREA)
Description
【発明の詳細な説明】
本発明は高速度、高信頼性に富む新規な印字ヘ
ツドを提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a novel print head that is high speed and highly reliable.
従来印字ヘツドは第1図に示すように永久磁石
1で構成された磁気回路を用い、待機状態では永
久磁石1の磁気吸引力により印字ハンマー2は吸
引され、印字動作時には前記磁気回路上の励磁コ
イル3に通電することで逆磁界を印加して印字ハ
ンマー2の吸引を解除せしめこのハンマー2に一
体に固着された板ばね4の弾性力により活字ホイ
ール5をプラテン6に巻装された用紙7に打撃す
ることで印字していた。8はインクリボンであ
る。斯かる方式では励磁コイル3に通電する電流
によるジユール熱のため印字ヘツド部の温度上昇
が大きく、特に高速で印字する際は印字ヘツド部
の温度上昇は120℃近くまで達するため、放熱を
充分に考慮した印字ヘツドの設計を行なう必要が
あつた。従つて高速印字に限界があり、又印字ヘ
ツド組立作業におけるコイルの巻線処理が煩雑で
あり工数もかかるためコスト高の要因となつてい
た。又コイルはインダクタスを有するため印字ス
ピードにも限界があつた。 As shown in Fig. 1, the conventional printing head uses a magnetic circuit composed of a permanent magnet 1. In the standby state, the printing hammer 2 is attracted by the magnetic attraction force of the permanent magnet 1, and during printing operation, the excitation on the magnetic circuit is By energizing the coil 3, a reverse magnetic field is applied to release the attraction of the printing hammer 2, and the elastic force of the leaf spring 4, which is integrally fixed to the hammer 2, moves the printing wheel 5 onto the paper 7 wound around the platen 6. Printing was done by hitting the 8 is an ink ribbon. In this method, the temperature of the print head increases significantly due to the heat generated by the current flowing through the excitation coil 3. Especially when printing at high speed, the temperature rise of the print head reaches nearly 120°C, so it is necessary to ensure sufficient heat dissipation. It was necessary to take this into consideration when designing the print head. Therefore, there is a limit to high-speed printing, and the coil winding process in the print head assembly work is complicated and requires many man-hours, which is a factor in high costs. Furthermore, since the coil has an inductance, there is a limit to the printing speed.
本発明の印字ヘツドは上記欠点を解決するた
め、励磁コイルを一切使用せず、永久磁石あるい
は高透磁率磁性体で構成された磁気回路のパーミ
アンスを、機械的に高透磁率磁性体あるいは永久
磁石を出退させることにより変化させることで印
字ハンマーの吸引を解除せしめ印字動作を得よう
とするものであり、永久磁石あるいは高透磁率磁
性体よりなる磁気ループを構成し、この磁気ルー
プ内に印字ハンマーを設け、前記磁気ループを開
閉することによつて印字ハンマーを駆動するよう
にしたものである。 In order to solve the above-mentioned drawbacks, the print head of the present invention does not use any excitation coil and mechanically adjusts the permeance of the magnetic circuit made of a permanent magnet or a high permeability magnetic material. The purpose is to release the attraction of the printing hammer and obtain printing operation by changing it by moving it in and out.It forms a magnetic loop made of a permanent magnet or a high permeability magnetic material, and prints within this magnetic loop. A hammer is provided, and the printing hammer is driven by opening and closing the magnetic loop.
以下本発明を実施例を示す図面に基づいて説明
する。先ず第1実施例を示す第2図〜第5図に基
づき説明する。図において11は継鉄で、この継
鉄11の一端側には永久磁石12が、他端側には
先端に印字ハンマーチツプ13を固着し磁性体で
形成された板ばねのアーマチユア14の基端がビ
ス等により固着されている。15は前記継鉄11
に非磁性フレーム16を介して取り付けられてい
る継鉄で、L型に形成され、その一端は前記アー
マチエア14の先端に対向し他端は前記永久磁石
12に間隔をおいて対向し、前記継鉄11、永久
磁石12、アーマチエア14とによつて磁気回路
を構成している。前記アーマチエア14の前方に
は樹脂等で形成された可撓性の活字ホイール17
が配置され、アーマチエア14上の印字ハンマー
チツプ13のプラテン18方向への打撃によりイ
ンクリボン19を介してプラテン18表面に巻装
されている用紙20に印字する如く構成されてい
る。又前記継鉄11、永久磁石12、印字ハンマ
ーチツプ13、アーマチエア14、継鉄15及び
非磁性フレーム16から成る印字ヘツド部21は
キヤリツジ22に搭載され、このキヤリツジ22
はキヤリツジガイドシヤフト23に案内されプラ
テン18に対向して往復動する。前記活字ホイー
ル17は第5図に示す如く花弁状に形成され、そ
の先端部に活字24が形成されている。又この活
字ホイール17はキヤリツジ22に取り付けられ
た活字選択モーター25に固着され、所要の活字
24を選択できるようモーター25はその回転が
制御されている。26は磁気遮閉デイスクで、こ
れは前記キヤリツジ22に固着されたモーター2
7のシヤフト27aにビス等で固着されている。
又この磁気遮閉デイスク26は第4図に示す如く
外周近傍部の同一円周上に等間隔おきに貫通孔2
8と磁性体29とを交互に配置し、印字ヘツド部
21の継鉄15と永久磁石12間に回転自在に配
置され、印字ヘツド部21の磁気回路のパーミア
ンスを変化させるべく構成されている。又磁気遮
閉デイスク26の中心にはインクリボン駆動軸3
0が一体に形成され、インクリボンカセツト31
内に収納されたインクリボン送りローラ32に着
脱自在に嵌入される如く構成されている。更に磁
気遮閉デイスク26は回転デイスクセンサー33
により正確にその回転を制御されており、印字ヘ
ツド部21の磁気回路のパーミアンスも正確な制
御がなされるものである。 The present invention will be described below based on drawings showing embodiments. First, the first embodiment will be explained based on FIGS. 2 to 5 showing the first embodiment. In the figure, 11 is a yoke, and a permanent magnet 12 is attached to one end of the yoke 11, and a printed hammer tip 13 is fixed to the tip of the other end of the yoke 11, and the base end of a leaf spring armature 14 made of a magnetic material. is fixed with screws etc. 15 is the yoke 11
A yoke is attached to the yoke via a non-magnetic frame 16, and is formed in an L shape, one end of which faces the tip of the armature air 14, the other end of which faces the permanent magnet 12 at a distance, and is connected to the yoke. Iron 11, permanent magnet 12, and armature air 14 constitute a magnetic circuit. In front of the armature air 14 is a flexible type wheel 17 made of resin or the like.
is arranged so that printing is performed on the paper 20 wound around the surface of the platen 18 via the ink ribbon 19 by the impact of the printing hammer chip 13 on the armature air 14 in the direction of the platen 18. Further, the printing head section 21 consisting of the yoke 11, the permanent magnet 12, the printing hammer chip 13, the armature air 14, the yoke 15 and the non-magnetic frame 16 is mounted on a carriage 22.
is guided by the carriage guide shaft 23 and reciprocates opposite the platen 18. The type wheel 17 is formed into a petal shape as shown in FIG. 5, and has a type 24 formed at its tip. The type wheel 17 is fixed to a type selection motor 25 attached to the carriage 22, and the rotation of the motor 25 is controlled so that a desired type 24 can be selected. 26 is a magnetic shielding disk, which is connected to the motor 2 fixed to the carriage 22.
It is fixed to the shaft 27a of No. 7 with screws or the like.
Further, as shown in FIG. 4, this magnetic shielding disk 26 has through holes 2 arranged at equal intervals on the same circumference near the outer periphery.
8 and magnetic bodies 29 are arranged alternately, and are rotatably arranged between the yoke 15 and the permanent magnet 12 of the printing head section 21, so as to change the permeance of the magnetic circuit of the printing head section 21. In addition, an ink ribbon drive shaft 3 is located at the center of the magnetic shielding disk 26.
0 is integrally formed, and the ink ribbon cassette 31
It is configured to be removably fitted into an ink ribbon feed roller 32 housed inside. Furthermore, the magnetic shielding disk 26 is connected to a rotating disk sensor 33.
The rotation of the print head 21 is precisely controlled, and the permeance of the magnetic circuit of the print head section 21 is also precisely controlled.
次に第3図に従つて動作を説明する。第3図A
は印字待機状態を示している。この状態において
永久磁石12と継鉄15との間に磁気遮閉デイス
ク26の磁性体29が介在している。このとき印
字ヘツド部21の磁気回路は継鉄11、永久磁石
12、アーマチエア14及び継鉄15により閉磁
路を構成している。即ちアーマチエア14は継鉄
15に吸引されて印字ハンマーチツプ13は印字
待機状態である。ここで、アーマチエア14によ
る弾性力をfs、印字力をF、磁気吸引力をfφ1、
遮閉時の磁気力をfφ2とする。ただし、磁速φ1に
よる力=fφ1〔第3図A〕
磁速φ2による力=fφ2〔第3図B〕
又fφ1>fs…… φ1≫φ2……
fφ2≪fs…… F=fs1−fφ2……
の4式が成立する如く印字ヘツド部21が構成さ
れているため、前述の印字待機状態が成立する。
次に第3図Bは印字動作状態である。今磁気遮閉
デイスク26をモーター27により回動せしめ、
回転デイスクセンサー33によりその位置を制御
して永久磁石12と継鉄15間に貫通孔28を介
在せしめると印字ヘツド部21の磁気回路は開磁
路となる。即ち上式の、及び式が成立し、
印字ハンマーチツプ13はインクリボン19及び
活字ホイール17に打撃を与え、用紙20上に文
字を形成し、印字動作が行なわれたことになる。
更に磁気遮閉デイスク26を回転させ第3図Aの
状態にすると、印字ハンマーチツプ13は待機状
態となる。従つて磁気遮閉デイスク26を連続し
て回転させることで連続して印字を行なうことが
でき高速度の印字ヘツドを得ることができる。
又、磁気遮閉デイスク6にはインクリボン駆動軸
30が一体に形成されているので、印字動作に同
期してインクリボン19が送られるため、インク
リボン駆動用のモーターを必要とせず、構成が簡
単となりコストダウンを図ることができ、高速化
にも対応できることになる。更に前記構成の印字
ヘツドは励磁コイルを必要としないため、コイル
のインダクタンスを考慮しなくて良く、コイルが
ジユール熱を発生することによる温度上昇がな
く、放熱設計を考慮しなくて良いため、印字ヘツ
ドを小型化できると共に高信頼性及び高速度の印
字ヘツドを提供することができる。又励磁コイル
がないため、組立工数の低減をも図れ、前記イン
クリボン駆動用のモーターを不要とするのと相ま
つてコストダウンを図ることができる。尚前記実
施例においては印字ヘツド部21に永久磁石12
を配して磁気回路を構成し、磁気遮閉デイスク2
6で前記磁気回路のパーミアンスを変化させた
が、前記継鉄11、永久磁石12、アーマチエア
14、継鉄15から成る磁気ループ本体側を全て
高透磁率磁性体により構成し、磁気遮閉デイスク
26側を永久磁石で構成して磁気回路のパーミア
ンスを変化させても同様の効果を得ることができ
る。 Next, the operation will be explained according to FIG. Figure 3A
indicates a print standby state. In this state, the magnetic body 29 of the magnetic shielding disk 26 is interposed between the permanent magnet 12 and the yoke 15. At this time, the magnetic circuit of the print head section 21 constitutes a closed magnetic path by the yoke 11, the permanent magnet 12, the armature air 14, and the yoke 15. That is, the armature air 14 is attracted by the yoke 15, and the printing hammer tip 13 is in a printing standby state. Here, the elastic force by the armature air 14 is fs, the printing force is F, the magnetic attraction force is fφ 1 ,
Let the magnetic force at the time of shielding be fφ 2 . However, force due to magnetic velocity φ 1 = fφ 1 [Figure 3 A] Force due to magnetic velocity φ 2 = fφ 2 [Figure 3 B] Also, fφ 1 > fs... φ 1 ≫φ 2 ... fφ 2 ≪fs . . . F=fs 1 −fφ 2 . . . Since the print head section 21 is configured so that the following four equations hold true, the above-mentioned print standby state is established.
Next, FIG. 3B shows the printing operation state. Now, the magnetic shielding disk 26 is rotated by the motor 27,
When the rotary disk sensor 33 controls its position and the through hole 28 is interposed between the permanent magnet 12 and the yoke 15, the magnetic circuit of the print head section 21 becomes an open magnetic path. In other words, the above formula and formula hold,
The printing hammer tip 13 strikes the ink ribbon 19 and the type wheel 17 to form characters on the paper 20, thus completing a printing operation.
When the magnetic shielding disk 26 is further rotated to the state shown in FIG. 3A, the printing hammer tip 13 is placed in a standby state. Therefore, by continuously rotating the magnetic shielding disk 26, continuous printing can be performed and a high-speed printing head can be obtained.
In addition, since the ink ribbon drive shaft 30 is integrally formed with the magnetic shielding disk 6, the ink ribbon 19 is fed in synchronization with the printing operation, so there is no need for a motor for driving the ink ribbon, and the configuration can be simplified. This makes it easy to use, reduces costs, and allows for higher speeds. Furthermore, since the print head with the above configuration does not require an excitation coil, there is no need to consider the inductance of the coil, and there is no temperature rise due to the coil's generation of heat, and there is no need to consider heat dissipation design. It is possible to reduce the size of the head and provide a print head with high reliability and high speed. Further, since there is no excitation coil, the number of assembly steps can be reduced, and the cost can be reduced by eliminating the need for the motor for driving the ink ribbon. In the above embodiment, the permanent magnet 12 is attached to the printing head section 21.
A magnetic circuit is constructed by arranging the magnetic shielding disk 2.
Although the permeance of the magnetic circuit was changed in step 6, the main body side of the magnetic loop consisting of the yoke 11, permanent magnet 12, armature air 14, and yoke 15 was all made of a high magnetic permeability magnetic material, and the magnetic shielding disk 26 A similar effect can be obtained by changing the permeance of the magnetic circuit by configuring the side with a permanent magnet.
更に磁気遮閉デイスク26は高透磁率磁性体、
例えば純鉄又は圭素鋼板等で第6図の如く花弁状
に、又第7図の如く等間隔おきに開孔34……を
設けて形成することができる。即ち本発明の要旨
を逸脱しない範囲で各種の変形が考えられる。 Furthermore, the magnetic shielding disk 26 is made of a high magnetic permeability magnetic material,
For example, they can be formed of pure iron or sulfur steel plate, etc., in a petal shape as shown in FIG. 6, or with openings 34 provided at equal intervals as shown in FIG. That is, various modifications can be made without departing from the spirit of the invention.
本発明印字ヘツドは以上述べたように実施し得
るものであり、励磁コイルを一切使用せず永久磁
石あるいは高透磁率磁性体で構成された磁気回路
のパーミアンスを、機械的に高透磁率磁性体ある
いは永久磁石を出退させることにより変化させる
ことで印字ハンマーを駆動させることができ、従
つてコイルのジユール熱を考慮した設計をする必
要もなく、構成簡単且つ小型で高信頼性及び高速
度の安価な印字ヘツドを提供できる。 The print head of the present invention can be implemented as described above, and the permeance of a magnetic circuit made of a permanent magnet or a high permeability magnetic material can be changed mechanically without using any excitation coil. Alternatively, the printing hammer can be driven by changing the permanent magnet by moving it in and out.Therefore, there is no need to take the coil heat into consideration in the design, and the structure is simple, small, highly reliable, and high speed. An inexpensive print head can be provided.
第1図は従来例を示す要部構成図、第2図〜第
5図は本発明の第1実施例を示し、第2図は要部
切欠正面図、第3図A,Bは印字ヘツド部の動作
説明図、第4図は磁気遮閉デイスクの平面図、第
5図は活字ホイールの正面図、第6図及び第7図
は夫々本発明の他の実施例における磁気遮閉デイ
スクの平面図である。
11……継鉄、12……永久磁石、13……印
字ハンマーチツプ、14……アーマチユア、15
……継鉄、17……活字ホイール、18……プラ
テン、19……インクリボン、20……用紙、2
1……印字ヘツド部、22……キヤリツジ、25
……活字選択モーター、26……磁気遮閉デイス
ク、27……モーター、28……貫通孔、29…
…磁性体。
Fig. 1 is a configuration diagram of main parts showing a conventional example, Figs. 2 to 5 show a first embodiment of the present invention, Fig. 2 is a cutaway front view of main parts, and Figs. 3 A and B are print heads. FIG. 4 is a plan view of the magnetic shielding disk, FIG. 5 is a front view of the type wheel, and FIGS. 6 and 7 are views of the magnetic shielding disk in other embodiments of the present invention. FIG. 11... Yoke, 12... Permanent magnet, 13... Printed hammer chip, 14... Armature, 15
... Yoke, 17 ... Type wheel, 18 ... Platen, 19 ... Ink ribbon, 20 ... Paper, 2
1... Print head section, 22... Carriage, 25
...Type selection motor, 26...Magnetic shielding disk, 27...Motor, 28...Through hole, 29...
...Magnetic material.
Claims (1)
磁気ループ内に印字ハンマーを設け、前記磁気ル
ープ本体内に対し高透磁率磁性体を出退させるこ
とにより磁気ループを開閉せしめ、前記印字ハン
マーを吸引離脱させ印字動作を行なうようにした
印字ヘツド。 2 磁気ループ本体側を高透磁率磁性体より構成
し、この磁気ループ本体内に対し永久磁石を出退
させることにより磁気ループを開閉せしめ、印字
ハンマー吸引離脱させ印字動作を行なうようにし
た特許請求の範囲第1項記載の印字ヘツド。 3 磁気ループ本体内への高透磁率磁性体の出退
動作をモーターの回転力を利用して行なわせるよ
うにした特許請求の範囲第1項記載の印字ヘツ
ド。 4 磁気ループ本体内への永久磁石の出退動作を
モーターの回転力を利用して行なわせるようにし
た特許請求の範囲第2項記載の印字ヘツド。 5 磁気ループ内への永久磁石又は高透磁率磁性
体の出退動作とインクリボンの送り駆動とを同一
駆動機構で行ない、印字動作とインクリボン送り
動作とを同期させた特許請求の範囲第1項および
第2項記載の印字ヘツド。[Scope of Claims] 1. A magnetic loop made of a permanent magnet is formed, a printing hammer is provided in the magnetic loop, and the magnetic loop is opened and closed by moving a high permeability magnetic material into and out of the magnetic loop main body. , a printing head which performs a printing operation by suctioning and separating the printing hammer. 2. A patent claim in which the magnetic loop main body side is made of a high magnetic permeability magnetic material, and the magnetic loop is opened and closed by moving a permanent magnet into and out of the magnetic loop main body, and a printing hammer is attracted and detached to perform a printing operation. A print head according to item 1 of the range. 3. The printing head according to claim 1, wherein the movement of the high magnetic permeability magnetic material into and out of the magnetic loop body is performed using the rotational force of a motor. 4. The printing head according to claim 2, wherein the permanent magnet is moved in and out of the magnetic loop body using the rotational force of a motor. 5. Claim 1, in which the movement of a permanent magnet or a high permeability magnetic material into and out of a magnetic loop and the feeding drive of an ink ribbon are performed by the same drive mechanism, and the printing operation and the feeding operation of the ink ribbon are synchronized. The print head described in paragraphs 1 and 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20327481A JPS58102786A (en) | 1981-12-15 | 1981-12-15 | Printing head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20327481A JPS58102786A (en) | 1981-12-15 | 1981-12-15 | Printing head |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58102786A JPS58102786A (en) | 1983-06-18 |
JPS6347635B2 true JPS6347635B2 (en) | 1988-09-22 |
Family
ID=16471329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20327481A Granted JPS58102786A (en) | 1981-12-15 | 1981-12-15 | Printing head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58102786A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54131417A (en) * | 1978-03-31 | 1979-10-12 | Nippon Electric Co | Printing hammer |
-
1981
- 1981-12-15 JP JP20327481A patent/JPS58102786A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54131417A (en) * | 1978-03-31 | 1979-10-12 | Nippon Electric Co | Printing hammer |
Also Published As
Publication number | Publication date |
---|---|
JPS58102786A (en) | 1983-06-18 |
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