JPS629033B2 - - Google Patents
Info
- Publication number
- JPS629033B2 JPS629033B2 JP13424781A JP13424781A JPS629033B2 JP S629033 B2 JPS629033 B2 JP S629033B2 JP 13424781 A JP13424781 A JP 13424781A JP 13424781 A JP13424781 A JP 13424781A JP S629033 B2 JPS629033 B2 JP S629033B2
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- magnetic
- dot
- magnetic flux
- leaf spring
- 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
- 230000004907 flux Effects 0.000 claims description 23
- 230000002265 prevention Effects 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 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
- 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
- B41J2/27—Actuators for print wires
- B41J2/28—Actuators for print wires of spring charge type, i.e. with mechanical power under electro-magnetic control
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Impact Printers (AREA)
- Electromagnets (AREA)
Description
【発明の詳細な説明】
本発明は、磁力作用と板バネの反発力によつて
ドツト文字を印字するいわゆるバネチヤージ型の
ドツト印字ヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called spring charge type dot printing head that prints dot characters by the action of magnetic force and the repulsive force of a leaf spring.
この様なドツト印字ヘツドは、先ず先端部にド
ツトワイヤを有する板バネを永久磁石の磁力によ
り偏倚させておき、該板バネに対応して設けられ
た電磁石を選択的に励磁することによつて、前記
永久磁石の磁束を打ち消して板バネの反発力によ
りドツトワイヤを駆動して所望のドツト文字を印
字用紙に印字するが、従来のドツト印字ヘツド
は、一度に複数本のドツトワイヤを駆動する場
合、すなわち複数個の電磁石を一度に励磁させる
場合、該電磁石相互間に於て磁気干渉が生じ所定
の印字する力が得られず、しかも、一度に駆動さ
れるドツトワイヤの本数により印字する力が変化
してばらつきを生じる為、良好なドツト文字を印
字することができない欠点がある。 Such a dot printing head is manufactured by first biasing a leaf spring having a dot wire at its tip by the magnetic force of a permanent magnet, and selectively exciting an electromagnet provided in correspondence with the leaf spring. A desired dot character is printed on printing paper by canceling out the magnetic flux of the permanent magnet and driving the dot wire by the repulsive force of the leaf spring. When multiple electromagnets are excited at once, magnetic interference occurs between the electromagnets, making it impossible to obtain the desired printing force.Moreover, the printing force changes depending on the number of dot wires driven at one time. This method has the disadvantage that good dot characters cannot be printed because of variations.
本発明は、前記した諸欠点を解決する為になさ
れたものであり、その目的は、ドツト印字ヘツド
の印字機能の向上をはかることにある。 The present invention has been made to solve the above-mentioned drawbacks, and its purpose is to improve the printing function of a dot printing head.
前記した目的を達成する為、本発明は、電磁石
のコイル全数と直列に接続した磁気干渉防止コイ
ルを、環状の永久磁石の内側または外側に配置し
たドツト印字ヘツドとしたことを特徴とする。 In order to achieve the above-mentioned object, the present invention is characterized in that a magnetic interference prevention coil connected in series with all the coils of the electromagnet is arranged as a dot printing head inside or outside the annular permanent magnet.
以下、図面に基づいて本発明の一実施例を説明
する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図に於て、１は円形の台板であり、ハウジ
ングを兼ねる環状の永久磁石２を搭載する。３は
略円板形の板バネで、求心方向に向けて複数の自
由端を形成してあり、スペーサ４を介して永久磁
石２上に片持ばりに積層され、また前記各自由端
の先端部にはアーマチユア５を介してドツトワイ
ヤ６を取付けてある。７はヨークで、永久磁石２
とほぼ同形であつて板バネ３上に固定されてい
る。８はカバーを兼ねたガイドフレームであり、
中央部に設けられた孔からドツトワイヤ６の先部
が所定の配列で突出する様になつている。９は電
磁石であり、コア１０とコイル１１とから構成さ
れ、前記永久磁石２の内側に於て前記板バネ３の
自由端を介在させてアーマチユア５に対応して配
置されている。１２は磁気干渉防止コイルであ
り、前記電磁石９のコイル１１の全てと直列に接
続して該電磁石９と前記永久磁石２との間に１個
配置してある。 In FIG. 1, reference numeral 1 denotes a circular base plate, on which is mounted an annular permanent magnet 2 which also serves as a housing. Reference numeral 3 denotes a substantially disk-shaped leaf spring, which has a plurality of free ends facing in the centripetal direction, and is laminated in a cantilever manner on the permanent magnet 2 with a spacer 4 interposed therebetween. A dot wire 6 is attached to the part via an armature 5. 7 is a yoke, permanent magnet 2
It has almost the same shape as , and is fixed on the leaf spring 3. 8 is a guide frame that also serves as a cover;
The tips of the dot wires 6 protrude in a predetermined arrangement from a hole provided in the center. Reference numeral 9 denotes an electromagnet, which is composed of a core 10 and a coil 11, and is arranged corresponding to the armature 5 inside the permanent magnet 2 with the free end of the leaf spring 3 interposed therebetween. A magnetic interference prevention coil 12 is connected in series with all the coils 11 of the electromagnet 9 and is disposed between the electromagnet 9 and the permanent magnet 2.
尚、本実施例に於ては、磁気干渉防止コイル１
２を永久磁石２の内側に配置したが、他の実施例
として永久磁石２の外側に配置してもよい。 In this embodiment, the magnetic interference prevention coil 1
2 is arranged inside the permanent magnet 2, but it may be arranged outside the permanent magnet 2 as another embodiment.
次に、この様に構成されたドツト印字ヘツドの
作用について説明する。 Next, the operation of the dot printing head constructed in this manner will be explained.
非印字時は電磁石９を励磁せず、永久磁石２の
磁束によつて、アーマチユア５を板バネ３の力に
抗してコア１１に吸引させ、それによつて板バネ
３を偏倚させる。 When not printing, the electromagnet 9 is not excited, and the armature 5 is attracted to the core 11 by the magnetic flux of the permanent magnet 2 against the force of the leaf spring 3, thereby biasing the leaf spring 3.
そこで、任意の１個のドツトワイヤ６を選択的
に駆動して印字する場合には、そのドツトワイヤ
６に対応するコイル１１に通電して永久磁石２の
磁束を打消し、コア１０に吸引していたアーマチ
ユア５を解放することによつて板バネ３を復旧さ
せる。 Therefore, when printing by selectively driving any one dot wire 6, the coil 11 corresponding to that dot wire 6 is energized to cancel the magnetic flux of the permanent magnet 2 and attract it to the core 10. By releasing the armature 5, the leaf spring 3 is restored.
しかし、永久磁石２の磁束を打消すコイル１１
の磁束φfは、板バネ３とコア１０の接点部で永
久磁石２によるアーマチユア５への吸引磁束を打
消すのみならず、相互誘導によつて隣接する電磁
石９のコア１０へも流れこみ、該コア１０へ流れ
こむ磁束は永久磁石２による吸引磁束と同一方向
となつて、該コア１０と対応するアーマチユア５
への吸引磁束を増加させる。 However, the coil 11 that cancels the magnetic flux of the permanent magnet 2
The magnetic flux φ f not only cancels the magnetic flux attracted to the armature 5 by the permanent magnet 2 at the contact point between the leaf spring 3 and the core 10, but also flows into the core 10 of the adjacent electromagnet 9 by mutual induction. The magnetic flux flowing into the core 10 is in the same direction as the magnetic flux attracted by the permanent magnet 2, and the magnetic flux flows into the armature 5 corresponding to the core 10.
Increase the magnetic flux attracted to.
従つて、一度に駆動される電磁石９の数が増加
するにしたがつて吸引磁束が増加することになる
が、この時、本発明は第２図に示す様に磁気干渉
防止コイル１２が電磁石９のすべてのコイル１１
と直列に接続しているので、それらのコイル１１
のうち一度に駆動されるコイル１１に電流を印加
すると、磁気干渉防止コイル１２から発生する磁
束が、駆動される電磁石９の数に比例して増加
し、この磁束が電磁石９によるアーマチユア５を
解放する磁束と同一方向に加えられることによつ
て、アーマチユア５への吸引磁束とバランスを保
ち、印字のドツトの個数に拘わらずかつ電磁石９
に印加する電圧や駆動時間を変えることなく均一
な印字する力を得る様にアーマチユア５を解放す
る。 Therefore, as the number of electromagnets 9 driven at once increases, the magnetic flux attracted increases. At this time, as shown in FIG. all coils 11
Since these coils 11 are connected in series with
When a current is applied to the coils 11 that are driven at once, the magnetic flux generated from the magnetic interference prevention coil 12 increases in proportion to the number of electromagnets 9 that are driven, and this magnetic flux releases the armature 5 by the electromagnets 9. By applying the magnetic flux in the same direction as the magnetic flux attracted to the armature 5, it maintains a balance with the magnetic flux attracted to the armature 5, regardless of the number of printed dots and the electromagnet 9
The armature 5 is released so as to obtain a uniform printing force without changing the voltage applied to the armature or the drive time.
これによりアーマチユア５を板バネ３の反発力
により回動させてドツトワイヤ６をガイドフレー
ム８の前面から突出させ、図示していないインク
リボンを介して印字用紙にドツト文字を形成す
る。 As a result, the armature 5 is rotated by the repulsive force of the leaf spring 3 to cause the dot wire 6 to protrude from the front surface of the guide frame 8, thereby forming dot characters on the printing paper via an ink ribbon (not shown).
尚、第２図は本発明による磁気干渉防止コイル
の一例を示す配線図であり、トランジスタQ1〜
Ｑoがそれぞれに対応するコイル１１１〜１１oに
それぞれ電流を供給し、この全ての電流が磁気干
渉防止コイル１２に流れる様に構成してある。 Incidentally, FIG. 2 is a wiring diagram showing an example of the magnetic interference prevention coil according to the present invention, in which transistors Q 1 to
Q o supplies current to the corresponding coils 11 1 to 11 o , respectively, and all the currents are configured to flow through the magnetic interference prevention coil 12.
上記した如く、本発明に係るドツト印字ヘツド
によれば、永久磁石の内側または外側に磁気干渉
防止コイルを備え、該磁気干渉防止コイルを電磁
石のコイル全数と直列接続することによつて、駆
動される電磁石の数の増加に伴つて磁気干渉によ
る吸引磁束が増加してもほぼ同量だけその吸引磁
束に対する解放磁束も増加する為、磁気干渉によ
る影響を受けなくなる。 As described above, according to the dot printing head according to the present invention, the magnetic interference prevention coil is provided inside or outside the permanent magnet, and the magnetic interference prevention coil is connected in series with all the coils of the electromagnet to be driven. Even if the attracting magnetic flux due to magnetic interference increases as the number of electromagnets increases, the releasing magnetic flux relative to the attracting magnetic flux also increases by approximately the same amount, so that it is no longer affected by magnetic interference.
その結果、印字するドツトの個数に左右され
ず、また電磁石に印加する電圧や駆動時間を変え
ることなく均一に印字する力を得ることができ、
良好なドツト文字を印字することができる。 As a result, it is possible to obtain uniform printing power regardless of the number of dots to be printed, and without changing the voltage applied to the electromagnet or the driving time.
Good dot characters can be printed.
第１図は本発明に係るドツト印字ヘツドの一実
施例を示す断面説明図、第２図は本発明に使用す
る磁気干渉コイルの一例を示す配線図である。
２…永久磁石、３…板バネ、６…ドツトワイ
ヤ、９…電磁石、１１…コイル、１２…磁気干渉
防止コイル。
FIG. 1 is an explanatory cross-sectional view showing one embodiment of a dot printing head according to the present invention, and FIG. 2 is a wiring diagram showing an example of a magnetic interference coil used in the present invention. 2... Permanent magnet, 3... Leaf spring, 6... Dot wire, 9... Electromagnet, 11... Coil, 12... Magnetic interference prevention coil.
Claims (1)
ドツトワイヤを有する略円板形の板バネを環状の
永久磁石の磁力により偏倚させ、前記各自由端に
対応して永久磁石の内側に設けられた電磁石を選
択的に励磁することによつて、前記永久磁石の磁
束を打消し、前記板バネの反発力によりドツトワ
イヤを駆動してドツト文字を印字するドツト印字
ヘツドにおいて、 前記永久磁石の内側または外側に１個の磁気干
渉防止コイルを配設し、該磁気干渉防止コイルを
前記電磁石のコイル全数と直列接続し、駆動され
る電磁石の数の増加に伴なつて磁気干渉による吸
引磁束が増加してもほぼ同量だけその吸引磁束に
対する解放磁束も増加させて磁気干渉による影響
を受けなくしたことを特徴とするドツト印字ヘツ
ド。[Scope of Claims] 1. A substantially disk-shaped leaf spring having a plurality of free ends at its tip and a dot wire at each free end is biased by the magnetic force of an annular permanent magnet, and a spring corresponding to each of the free ends is biased by the magnetic force of an annular permanent magnet. A dot printing head that prints dot characters by selectively exciting an electromagnet provided inside a permanent magnet to cancel the magnetic flux of the permanent magnet and drive a dot wire by the repulsive force of the leaf spring. In, one magnetic interference prevention coil is disposed inside or outside the permanent magnet, the magnetic interference prevention coil is connected in series with all the coils of the electromagnet, and as the number of driven electromagnets increases, A dot printing head characterized in that even if the magnetic flux attracted by magnetic interference increases, the magnetic flux released relative to the magnetic flux increased by almost the same amount, thereby eliminating the influence of magnetic interference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13424781A JPS5836469A (en) | 1981-08-28 | 1981-08-28 | Dot printer head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13424781A JPS5836469A (en) | 1981-08-28 | 1981-08-28 | Dot printer head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5836469A JPS5836469A (en) | 1983-03-03 |
| JPS629033B2 true JPS629033B2 (en) | 1987-02-26 |
Family
ID=15123830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13424781A Granted JPS5836469A (en) | 1981-08-28 | 1981-08-28 | Dot printer head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5836469A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4498791A (en) * | 1983-03-28 | 1985-02-12 | Texas Instruments Incorporated | Printer having improved stored energy printhead |
| JPS59179358A (en) * | 1983-03-31 | 1984-10-11 | Toshiba Corp | Driving system of printing head |
| JPS61222760A (en) * | 1985-03-19 | 1986-10-03 | Fujitsu Ltd | Printing head control system |
| SE456982B (en) * | 1987-03-27 | 1988-11-21 | Ericsson Telefon Ab L M | DRIVING PROCEDURE TO MOVE WRITING ELEMENT AT PRINT HEAD AND PRINT HEAD WITH MOVEMENT MECHANISM |
-
1981
- 1981-08-28 JP JP13424781A patent/JPS5836469A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5836469A (en) | 1983-03-03 |
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