JP2712443B2 - Print head for dot printer - Google Patents
Print head for dot printerInfo
- Publication number
- JP2712443B2 JP2712443B2 JP32022188A JP32022188A JP2712443B2 JP 2712443 B2 JP2712443 B2 JP 2712443B2 JP 32022188 A JP32022188 A JP 32022188A JP 32022188 A JP32022188 A JP 32022188A JP 2712443 B2 JP2712443 B2 JP 2712443B2
- Authority
- JP
- Japan
- Prior art keywords
- print head
- lever
- solenoid
- core
- suction
- 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 - Lifetime
Links
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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/235—Print head assemblies
Landscapes
- Impact Printers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はドットプリンタ用印字ヘッドに関する。Description: TECHNICAL FIELD The present invention relates to a print head for a dot printer.
第４図にドットプリンタ用印字ヘッドの従来例を示
す。34はソレノイドで駆動パルスが印字されると回動自
在に支持されたレバー35を吸引し、印字ワイヤ36を突出
させる。駆動パルスの印加が終了し吸引力が消失すると
印字ワイヤ36と図示しないプラテンとの衝突反力とコイ
ルばね37のばね力によりレバー35はワイヤ突出時と反対
方向に回動し、ダンパー38の位置へ復帰する。良好な印
字品質を得るためには、複数の印字ワイヤの変位量と突
出速度のばらつきをおさえることが重要である。そのた
め第５図に示すようにレバーの吸引力と変位量を決定す
るレバー吸引部とソレノイドコアとの吸引ギャップδを
精密に管理することが必要である。FIG. 4 shows a conventional example of a print head for a dot printer. When the drive pulse is printed by the solenoid 34, the rotatably supported lever 35 is sucked to make the printing wire 36 protrude. When the application of the drive pulse ends and the suction force disappears, the lever 35 rotates in the opposite direction to that when the wire protrudes due to the collision reaction force between the printing wire 36 and a platen (not shown) and the spring force of the coil spring 37, and the position of the damper 38 Return to In order to obtain good printing quality, it is important to suppress the variation in the displacement amount and the projecting speed of a plurality of printing wires. Therefore, as shown in FIG. 5, it is necessary to precisely control the suction gap δ between the lever suction portion for determining the suction force and the displacement of the lever and the solenoid core.
しかし、上述したような従来の構造の場合、この吸引
ギャップはレバー形状、ダンパー厚さのほかに第５図に
示すように少なくともａ、ｂ、ｃの３ヵ所の寸法が影響
する。したがって吸引ギャップを精密に管理するのがき
わめて困難だった。However, in the case of the conventional structure as described above, this suction gap is affected by at least three dimensions a, b and c as shown in FIG. 5 in addition to the lever shape and the damper thickness. Therefore, it was extremely difficult to precisely control the suction gap.
そこで本発明の目的は吸引ギャップのばらつきを容易
におさえることが可能な構造により、部品、組み立てコ
ストを低減し安価で、高品質のドットプリンタ用印字ヘ
ッドを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive, high-quality print head for a dot printer with a structure capable of easily suppressing variations in a suction gap, thereby reducing parts and assembly costs.
すなわち本発明のドットプリンタ用印字ヘッドは、リ
ング状に突出した複数のソレノイドコアと、ソレノイド
コアを有するコアブロックと、コアブロックの中央の突
起面に載置したダンパーと、中央に支点を有し一端に吸
引部、他端に印字ワイヤを有するレバーとを備え、該ソ
レノイドコアの吸引面と、該コアブロックの外周面及び
中央の突起面とを同一平面にしたことを特徴とする。That is, the print head for a dot printer of the present invention has a plurality of solenoid cores protruding in a ring shape, a core block having a solenoid core, a damper placed on a projection surface at the center of the core block, and a fulcrum at the center. A suction portion is provided at one end, and a lever having a printing wire is provided at the other end, and a suction surface of the solenoid core is made flush with an outer peripheral surface and a central protruding surface of the core block.
以下に本発明の実施例を図面に基づいて説明する。第
１図及び第２図において、１はケイ素鋼等の磁性材から
なるコアブロックで９個のソレノイドコア３がリング状
に突出形成されている。コアブロック１の中央部には本
発明の特徴部品のひとつである円柱形の突起部４が形成
されていて、外周面２、ソレノイドコア３の吸引面14及
び円柱形突起部４の上面15は裏面５と共に両面同時研磨
によって精密に同一面となっている。ソレノイドコア３
にはそれぞれソレノイド６が圧入され基板７にはんだ付
けされている。円柱形成突起部４の上面15にはダンパー
位置決めピン29が圧入されていて、このダンパー位置決
めピン29に位置決めされてドーナッツ形のダンパー30が
載置されている。コアブロック１の外周面２と円柱形突
起部４の上面15にはソレノイド６の上面に形成された突
起33に位置決めされて９本のスリット８を放射状に形成
した磁性材よりなる皿形ヨーク９が載置されて、さらに
その上にはレバー10の軸支持用横溝11を有する９本のス
リット12を形成した磁性材よりなる円板形ヨーク13が積
層載置されている。そしてこれらの各スリット８、12と
横溝11に杆部と支点軸18を合致させるようにして９個の
レバー10が配置されている。レバー10のソレノイドコア
３と対向する位置には吸引部31が形成されていて他端に
は印字ワイヤ17が固着されている。支点軸18はノーズ19
に設けられた突起部20と、皿形ヨーク９によって挟持さ
れている。さらにノーズ19には一端にばね保持部材32、
他端にガイドホルダ21を一体的に突出形成させたフレー
ム22が圧入されている。ばね保持部材32にはコイルばね
23の外径よりやや大きい円筒孔24が９個形成されてい
て、コイルばね23を保持している。一方ガイドホルダ21
にはワイヤガイド25、26、27および28が挿入されていて
印字ワイヤ17が軸方向に摺動するのを案内している。Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a core block made of a magnetic material such as silicon steel, in which nine solenoid cores 3 are formed to project in a ring shape. At the center of the core block 1, there is formed a columnar projection 4, which is one of the characteristic parts of the present invention. The outer peripheral surface 2, the suction surface 14 of the solenoid core 3, and the upper surface 15 of the columnar projection 4 are The both surfaces are precisely polished together with the back surface 5 by simultaneous polishing. Solenoid core 3
The solenoids 6 are press-fitted and soldered to the substrate 7, respectively. A damper positioning pin 29 is press-fitted on the upper surface 15 of the columnar forming projection 4, and a donut-shaped damper 30 is mounted on the damper positioning pin 29. On the outer peripheral surface 2 of the core block 1 and the upper surface 15 of the cylindrical projection 4, a dish-shaped yoke 9 made of a magnetic material having nine slits 8 formed radially and positioned on projections 33 formed on the upper surface of the solenoid 6. A disk-shaped yoke 13 made of a magnetic material and formed with nine slits 12 having a horizontal groove 11 for supporting the shaft of the lever 10 is further stacked thereon. Nine levers 10 are arranged in the slits 8 and 12 and the lateral groove 11 so that the rod and the fulcrum shaft 18 are aligned. A suction portion 31 is formed at a position of the lever 10 facing the solenoid core 3, and a printing wire 17 is fixed to the other end. The fulcrum shaft 18 is the nose 19
And the plate-shaped yoke 9. Further, the nose 19 has a spring holding member 32 at one end,
A frame 22 having a guide holder 21 integrally formed at the other end is press-fitted. A coil spring is used for the spring holding member 32.
Nine cylindrical holes 24 slightly larger than the outer diameter of 23 are formed to hold the coil spring 23. On the other hand, guide holder 21
Have wire guides 25, 26, 27 and 28 inserted therein to guide the printing wire 17 to slide in the axial direction.
このようにして構成されたドットプリンタ用印字ヘッ
ドにおいて、印字信号により選択された１つもしくは複
数のソレノイド６に電流が印加されるとソレノイドコア
３から皿形ヨーク９と円板形ヨーク13に流れる磁束によ
ってレバー10は吸引され、先端に保持した印字ワイヤ17
を軸方向に突出させ印字を行う。電流の印加が終了する
と吸引力が消失し印字ワイヤ17と図示しないプラテンと
の衝突反力とコイルばね23のばね力によりレバー10は元
の位置に復帰する。レバー10の運動量はダンパー30との
衝突時に吸引されリバウンドは小さくおさえられる。When a current is applied to one or a plurality of solenoids 6 selected by a print signal in the print head for a dot printer thus configured, the current flows from the solenoid core 3 to the dish-shaped yoke 9 and the disc-shaped yoke 13. The lever 10 is attracted by the magnetic flux, and the printing wire 17 held at the tip is
Is printed in the axial direction. When the application of the current is completed, the suction force disappears, and the lever 10 returns to the original position by the collision reaction force between the printing wire 17 and the platen (not shown) and the spring force of the coil spring 23. The momentum of the lever 10 is sucked at the time of collision with the damper 30, and the rebound is kept small.
ところで本発明は第３図に示すように構成されている
ので、吸引キャップδはレバー10の形状、ダンパー30の
厚さの他には皿形ヨーク９のａ寸法のみを管理すればよ
い。さらにａ寸法の精度は皿形ヨーク９を両面研磨する
ことにより容易に管理可能であるから吸引ギャップδを
高精度に管理することができる。By the way, since the present invention is configured as shown in FIG. 3, the suction cap δ only needs to manage the dimension a of the dish-shaped yoke 9 in addition to the shape of the lever 10 and the thickness of the damper 30. Furthermore, since the accuracy of the dimension a can be easily controlled by polishing the dish-shaped yoke 9 on both sides, the suction gap δ can be controlled with high precision.
以上、９ピンの印字ヘッドについて実施例を示した
が、上記のように構成したユニットを２段に積層するこ
とも容易であり24、48ピン等の多ピン印字ヘッドにも適
用できる。Although the embodiment has been described above with respect to the 9-pin print head, it is easy to stack the units configured as described above in two stages, and the present invention can be applied to a multi-pin print head having 24 or 48 pins.
以上述べたように本発明のドットプリンタ用印字ヘッ
ドは、容易に吸引ギャップの精度を管理することが可能
であるため、印字ワイヤの変位量、突出速度のばらつき
を小さくおさえることができ、部品、組み立てコストを
低減し、安価で、印字濃淡やピッチむら等のない良好な
印字品質が得られる。また、ダンパーを載置している部
材の剛性が高いため、レバーがダンパーに衝突する時の
振動が小さくなり騒音も減少するといった効果もある。As described above, the print head for a dot printer of the present invention can easily manage the accuracy of the suction gap, so that the displacement amount of the print wire and the variation in the protrusion speed can be reduced, and the components, Good printing quality can be obtained with reduced assembly cost, inexpensiveness, and with no print density and uneven pitch. Further, since the rigidity of the member on which the damper is mounted is high, there is an effect that vibration when the lever collides with the damper is reduced and noise is reduced.
第１図は本発明の実施例を示す断面図、第２図は本発明
の実施例を示す斜視図、第３図は本発明の主要部の寸法
関係を示す概略図、第４図は従来技術を示す断面図、第
５図は従来技術の主要部の寸法関係を示す概略図であ
る。 １……コアブロック ３……ソレノイドコア ４……円柱状突起部 ６……ソレノイド ７……基板 ９……皿形ヨーク 13……円板形ヨーク 10……レバー 17……印字ワイヤ 18……支点軸 19……ノーズ 22……フレーム 23……コイルばね 25、26、27、28……ワイヤガイド 29……ダンパー位置決ピン 30……ダンパーFIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a perspective view showing an embodiment of the present invention, FIG. 3 is a schematic diagram showing a dimensional relationship of main parts of the present invention, and FIG. FIG. 5 is a cross-sectional view showing the technique, and FIG. DESCRIPTION OF SYMBOLS 1 ... Core block 3 ... Solenoid core 4 ... Cylindrical projection 6 ... Solenoid 7 ... Substrate 9 ... Disc-shaped yoke 13 ... Disc-shaped yoke 10 ... Lever 17 ... Print wire 18 ... Support shaft 19 19 Nose 22 Frame 23 Coil spring 25, 26, 27, 28 Wire guide 29 Damper positioning pin 30 Damper
Claims (1)
と、該ソレノイドコアを有するコアブロックと、該コア
ブロックの中央の突起面に載置したダンパーと、中央に
支点を有し一端に吸引部、他端に印字ワイヤを有するレ
バーとを備え、前記ソレノイドコアの吸引面と、前記コ
アブロックの外周面及び中央の突起面とを同一平面にし
たことを特徴とするドットプリンタ用印字ヘッド。1. A plurality of solenoid cores protruding in a ring shape, a core block having the solenoid core, a damper mounted on a central projection surface of the core block, a fulcrum at the center and a suction part at one end. And a lever having a printing wire at the other end, wherein a suction surface of the solenoid core and an outer peripheral surface and a central protruding surface of the core block are flush with each other.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32022188A JP2712443B2 (en) | 1988-12-19 | 1988-12-19 | Print head for dot printer |
| DE68913933T DE68913933T2 (en) | 1988-12-19 | 1989-12-11 | Dot impact printer. |
| EP89122824A EP0374673B1 (en) | 1988-12-19 | 1989-12-11 | Wire-dot impact printer |
| US07/450,094 US4993854A (en) | 1988-12-19 | 1989-12-13 | Wire dot print head |
| HK72995A HK72995A (en) | 1988-12-19 | 1995-05-11 | Wire-dot impact printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32022188A JP2712443B2 (en) | 1988-12-19 | 1988-12-19 | Print head for dot printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02164551A JPH02164551A (en) | 1990-06-25 |
| JP2712443B2 true JP2712443B2 (en) | 1998-02-10 |
Family
ID=18119075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32022188A Expired - Lifetime JP2712443B2 (en) | 1988-12-19 | 1988-12-19 | Print head for dot printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2712443B2 (en) |
-
1988
- 1988-12-19 JP JP32022188A patent/JP2712443B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02164551A (en) | 1990-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20081031 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 12 Free format text: PAYMENT UNTIL: 20091031 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091031 Year of fee payment: 12 |