JPH0245990B2 - - Google Patents
Info
- Publication number
- JPH0245990B2 JPH0245990B2 JP57229289A JP22928982A JPH0245990B2 JP H0245990 B2 JPH0245990 B2 JP H0245990B2 JP 57229289 A JP57229289 A JP 57229289A JP 22928982 A JP22928982 A JP 22928982A JP H0245990 B2 JPH0245990 B2 JP H0245990B2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- constant current
- energy
- transistor
- present
- 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
- B41J9/00—Hammer-impression mechanisms
- B41J9/26—Means for operating hammers to effect impression
- B41J9/38—Electromagnetic means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Impact Printers (AREA)
Description
【発明の詳細な説明】
(A) 発明の技術分野
本発明は、印字装置、特に活字面積によつて印
字圧を調整するようにした印字装置において、ハ
ンマ駆動初期の定電流を大に選んでおいて当該定
電流供給期間を活字面積に応じて調節する構成を
採用しつつ、ハンマ・マグネツトの自励エネルギ
の放出態様を設定せしめるようにして回路構成を
簡易化した印字装置に関するものである。[Detailed Description of the Invention] (A) Technical Field of the Invention The present invention provides a printing device, particularly a printing device in which the printing pressure is adjusted depending on the type area, in which the constant current at the initial stage of hammer drive is selected to be large. The present invention relates to a printing device in which the circuit configuration is simplified by adopting a configuration in which the constant current supply period is adjusted according to the type area, and the manner in which the self-excited energy of the hammer magnet is released is set.
(B) 技術の背景と問題点
従来から印字ハンマを用いる印字装置において
はハンマ駆動用マグネツトをそなえているが、活
字フオントの活字面積の大小に応じて印字圧を調
節する必要があり、従来、第１図図示の場合や第
２図図示の場合の如く、上記マグネツトに流れる
電流を調節することが行われている。即ち、第１
図図示の場合には、駆動初期に比較的大きい定電
流を供給するための定電流供給期間Ｔをもうけ、
当該定電流供給期間Ｔ経過後に上記活字面積に対
応した形で所定レベルの定電流を供給するように
されている。また第２図図示の場合には、印字時
間全体にわたつて上記活字面積に対応した形で所
定レベルの定電流を供給するようにされている。(B) Background and problems of the technology Conventionally, printing devices that use a printing hammer have been equipped with a magnet for driving the hammer, but it is necessary to adjust the printing pressure depending on the size of the print area of the type font. As in the case shown in FIG. 1 and the case shown in FIG. 2, the current flowing through the magnet is adjusted. That is, the first
In the case shown in the figure, a constant current supply period T for supplying a relatively large constant current is provided at the initial stage of driving,
After the constant current supply period T has elapsed, a constant current of a predetermined level is supplied in a manner corresponding to the printed area. Further, in the case shown in FIG. 2, a constant current of a predetermined level is supplied in a manner corresponding to the above-mentioned type area over the entire printing time.
第１図図示の場合には、駆動初期に十分大きい
電流を供給するために、ハンマを含む機構部分が
雰囲気温度などによる潤滑油の粘性の影響をうけ
て印字にバラツキを生じることが少ないが、一
方、所定時間経過後に上記所定レベルの定電流を
供給することから回路構成が複雑となる。また第
２図図示の場合には、回路構成は比較的簡単で足
りるが、上記雰囲気温度などによる潤滑油の粘性
の影響が生じ易くなる。 In the case shown in Fig. 1, since a sufficiently large current is supplied at the initial stage of driving, the mechanical parts including the hammer are not affected by the viscosity of the lubricating oil due to the ambient temperature, etc., and variations in printing are unlikely to occur. On the other hand, since the constant current at the predetermined level is supplied after a predetermined time has elapsed, the circuit configuration becomes complicated. Further, in the case shown in FIG. 2, the circuit configuration is relatively simple and sufficient, but the viscosity of the lubricating oil is likely to be affected by the above-mentioned ambient temperature.
(C) 発明の目的と構成
本発明は、上記の点を解決することを目的とし
ており、いわば第１図図示の場合に類似する駆動
電流供給を行いつつ、必要とする回路を簡易化す
ることを目的としている。そしてそのため、本発
明の印字装置は、印字ハンマ駆動用マグネツトを
そなえると共に、各マグネツトに供給する駆動電
流を定電流に選んでおいて活字面積の大きさに対
応づけてエネルギ供給を制御する印字装置におい
て、上記定電流を供給する定電流供給期間を上記
活字面積の大きさに対応づけて設定し、かつ上記
マグネツトに並列に当該マグネツトに蓄積されて
いるエネルギを放出するための自励エネルギ限定
放出回路をもうけると共に、当該自励エネルギ限
定放出回路によるエネルギ放出を上記定電流供給
期間経過以降有効化するよう制御する制御回路部
をもうけたことを特徴としている。(C) Object and structure of the invention The present invention aims to solve the above-mentioned problems, and it is possible to simplify the necessary circuit while supplying a driving current similar to that shown in FIG. 1. It is an object. Therefore, the printing device of the present invention is equipped with a magnet for driving a printing hammer, and also controls the energy supply in accordance with the size of the type area by selecting a constant driving current to be supplied to each magnet. , the constant current supply period for supplying the constant current is set in correspondence with the size of the typeface area, and a self-excited energy limited release is provided in parallel with the magnet to release the energy stored in the magnet. The present invention is characterized in that it includes a control circuit section that controls the self-excited limited energy emission circuit to enable energy emission after the constant current supply period has elapsed.
(D) 発明の実施例
第３図は本発明において行われる駆動電流供給
態様の一実施例、第４図は本発明の一実施例要部
構成、第５図は第４図図示構成の動作を説明する
タイム・チャート、第６図および第７図は夫々本
発明の一実施例の要部構成を示す。(D) Embodiments of the Invention FIG. 3 shows an embodiment of the drive current supply mode performed in the present invention, FIG. 4 shows the main part configuration of the embodiment of the present invention, and FIG. 5 shows the operation of the configuration shown in FIG. 4. FIGS. 6 and 7, which are time charts for explaining the above, each show the main structure of an embodiment of the present invention.
本発明の場合、第１図と第３図とを対比すると
明瞭となる如く、駆動初期において十分大きい定
電流を供給する点に関して同じであるが、定電流
供給期間T1，T2…を活字面積に対応して設定せ
しめると共に、当該定電流供給期間経過後にマグ
ネツトの自励エネルギを徐々に放出せしめるよう
にせしめている。このようにすることによつて、
定電流供給期間T1，T2…を設定せしめるだけで
足り、回路構成が大幅に簡易化される。 In the case of the present invention, as will become clear when comparing FIG. 1 and FIG . It is set in accordance with the area, and the self-excited energy of the magnet is gradually released after the constant current supply period has elapsed. By doing this,
It is sufficient to simply set the constant current supply periods T 1 , T 2 . . . , and the circuit configuration is greatly simplified.
第４図は本発明の一実施例要部構成を示し、図
中の符号１はハンマ駆動用マグネツト（マグネツ
トのコイル）、２は駆動電流供給用トランジスタ、
３は定電流制御部であつてトランジスタ２を流れ
る電流を定電流値に維持せしめるもの、４は帰還
抵抗、５はアンド論理部、６は自励エネルギ限定
放出回路、７はダイオード、８はトランジスタ、
９はツエナ・ダイオード、１０は抵抗を表わして
いる。 FIG. 4 shows the main part configuration of an embodiment of the present invention, in which reference numeral 1 denotes a hammer drive magnet (magnet coil), 2 a drive current supply transistor,
3 is a constant current control unit that maintains the current flowing through the transistor 2 at a constant current value, 4 is a feedback resistor, 5 is an AND logic unit, 6 is a self-excited energy limited emission circuit, 7 is a diode, and 8 is a transistor. ,
9 represents a Zener diode, and 10 represents a resistor.
マグネツト１に駆動電流が供給されるとき、当
該マグネツト１が駆動する活字フオントの活字面
積に予め対応づけられた期間Tiだけ論理「１」
とされる信号Ｂが、第５図図示の如く供給され
る。そして例えば同時に、全印字時間に対応する
期間論理「０」となる信号Ａが供給される。この
ように信号を供給することによつて、アンド論理
部５を介して定電流制御部３による制御が有効と
なり、第５図図示「有効マグネツト電流」の如
く、マグネツト１を流れる電流が急速に立上が
り、信号Ｂが論理「０」となるまで定電流制御が
行われる。この間、信号Ａによつてトランジスタ
８はオン状態にあり、信号Ｂが論理「０」となつ
てトランジスタ２がオフ状態に移動するとき、マ
グネツト１に流れつづけようとする慣性によつて
トランジスタ８を介してマグネツト１に短絡回路
が形成される。この結果、マグネツト１を流れる
電流は第５図図示の如く漸減してゆく。そして、
信号Ａが論理「１」に戻つた際になおエネルギが
残存している如き場合には、コイルに生ずる逆起
電力によりツエナ・ダイオード９が強制的にオン
されてトランジスタ８は再びオンし、このツエ
ナ・ダイオードに生じた電圧でこの逆起電力が消
費される。このために、マグネツト１のエネルギ
は急速に消滅する。 When a drive current is supplied to the magnet 1, the logic becomes "1" for a period Ti that is pre-corresponding to the type area of the type font driven by the magnet 1.
A signal B is supplied as shown in FIG. For example, at the same time, a signal A is supplied which becomes logic "0" for a period corresponding to the entire printing time. By supplying the signal in this way, the control by the constant current control section 3 becomes effective via the AND logic section 5, and the current flowing through the magnet 1 rapidly increases as shown in the "effective magnet current" shown in FIG. Constant current control is performed until the signal B rises and becomes logic "0". During this period, the transistor 8 is in the on state due to the signal A, and when the signal B becomes logic "0" and the transistor 2 moves to the off state, the inertia that continues to flow through the magnet 1 causes the transistor 8 to be turned on. A short circuit is formed through the magnet 1. As a result, the current flowing through the magnet 1 gradually decreases as shown in FIG. and,
If there is still energy remaining when the signal A returns to logic "1", the Zener diode 9 is forcibly turned on by the back electromotive force generated in the coil, and the transistor 8 is turned on again. This back electromotive force is consumed by the voltage generated across the Zener diode. For this reason, the energy of the magnet 1 is rapidly dissipated.
本発明の場合、第３図図示の時間Tiを活字面
積に対応して予め設定しておいて、信号Ｂとして
供給すればよく、回路構成が大幅に簡単となる。 In the case of the present invention, it is sufficient to set the time Ti shown in FIG. 3 in advance in accordance with the type area and supply it as the signal B, which greatly simplifies the circuit configuration.
第６図は本発明の他の一実施例要部構成を示し
ている。図中の番号１ないし１０、および信号
Ａ，Ｂは第４図に対応しており、１１は限流抵抗
を表わしている。第６図図示構成の場合の動作
は、第５図図示の場合と実質的に全く同じである
が、限流抵抗１１の値を選ぶことによつて、例え
ば第３図図示のエネルギ放出期間におけるエネル
ギ放出時定数を所望に選定することが可能とな
り、活字面積に対応づける設定が容易となる。 FIG. 6 shows the main part configuration of another embodiment of the present invention. Numbers 1 to 10 in the figure and signals A and B correspond to those in FIG. 4, and 11 represents a current limiting resistor. The operation in the case of the configuration shown in FIG. 6 is substantially the same as the case shown in FIG. 5, but by selecting the value of the current limiting resistor 11, It becomes possible to select the energy release time constant as desired, and it becomes easy to set it in correspondence with the print area.
第７図は本発明の他の一実施例要部構成を示し
ている。図中の符号１，６，７，１０は第４図や
第６図に対応し、８′は第６図図示のトランジス
タ８とダイオード９とを兼ねる役割をもつトラン
ジスタ、１１′は第６図図示のトランジスタ８と
限流抵抗１１とを兼ねる役割をもつ限流抵抗を表
わしている。第７図図示の場合、第５図図示信号
Ａが論理「０」となつている期間、トランジスタ
８′はオフ状態とされ、信号Ａが論理「１」に戻
るときトランジスタ８′がオン状態とされてマグ
ネツト１に残つているエネルギを急速に放出せし
める。即ちトランジスタ８′がオフの間、マグネ
ツト１のエネルギは抵抗１１′を介して放出され
ているが、トランジスタ８′がオンとなるといわ
ばシヨート回路が形成された形で放出される。 FIG. 7 shows the main part configuration of another embodiment of the present invention. Reference numerals 1, 6, 7, and 10 in the figure correspond to those in FIG. 4 and FIG. 6, 8' is a transistor that also serves as transistor 8 and diode 9 shown in FIG. It represents a current-limiting resistor that serves both as the illustrated transistor 8 and the current-limiting resistor 11. In the case shown in FIG. 7, the transistor 8' is turned off during the period when the signal A shown in FIG. This causes the energy remaining in the magnet 1 to be rapidly released. That is, while the transistor 8' is off, the energy of the magnet 1 is released through the resistor 11', but when the transistor 8' is turned on, the energy is released in the form of a short circuit.
なお、本発明にいう自励エネルギ限定放出回路
６は、第４図図示におけるトランジスタ８とダイ
オード７とによる放電路の如く、実質上シヨート
回路を構成するものであつてもよく、また第６図
や第７図に示した如く放電電流レベルが制限され
た値をもつ如き構成のものであつてもよい。 The self-excited energy limited emission circuit 6 according to the present invention may substantially constitute a short circuit, such as the discharge path formed by the transistor 8 and the diode 7 shown in FIG. Alternatively, as shown in FIG. 7, the discharge current level may have a limited value.
(E) 発明の効果
以上説明した如く、本発明によれば、駆動初期
において十分大きい駆動電流を供給する方式を採
用しつつ、回路構成が大幅に簡易化される。(E) Effects of the Invention As explained above, according to the present invention, the circuit configuration is greatly simplified while adopting a method of supplying a sufficiently large drive current at the initial stage of driving.
第１図および第２図は夫々従来公知の駆動電流
供給態様を示し、第３図は本発明において行われ
る駆動電流供給態様の一実施例を示す。第４図は
本発明の一実施例要部構成、第５図は第４図図示
構成の動作を説明するタイム・チヤート、第６図
および第７図は夫々本発明の一実施例の要部構成
を示す。
図中、T1，T2…は定電流供給期間、１はマグ
ネツト、２はトランジスタ、３は定電流制御部、
６は自励エネルギ限定放出回路を表わしている。
1 and 2 each show a conventionally known drive current supply mode, and FIG. 3 shows an embodiment of the drive current supply mode performed in the present invention. FIG. 4 is a main part configuration of an embodiment of the present invention, FIG. 5 is a time chart explaining the operation of the configuration shown in FIG. 4, and FIGS. 6 and 7 are main parts of an embodiment of the present invention, respectively. Show the configuration. In the figure, T 1 , T 2 ... are constant current supply periods, 1 is a magnet, 2 is a transistor, 3 is a constant current control section,
6 represents a self-excited energy limited emission circuit.
Claims (1)
に、各マグネツトに供給する駆動電流を定電流に
選んでおいて活字面積の大きさに対応づけてエネ
ルギ供給を制御する印字装置において、上記定電
流を供給する定電流供給期間を上記活字面積の大
きさに対応づけて設定し、かつ上記マグネツトに
並列に当該マグネツトに蓄積されているエネルギ
を放出するための自励エネルギ限定放出回路をも
うけると共に、当該自励エネルギ限定放出回路に
よるエネルギ放出を上記定電流供給期間経過以降
有効化するよう制御する制御回路部をもうけたこ
とを特徴とする印字装置。1 In a printing device that is equipped with a magnet for driving a printing hammer, and also selects a constant current as the drive current supplied to each magnet and controls the energy supply in accordance with the size of the type area, the constant current that supplies the constant current is selected. The current supply period is set in correspondence with the size of the typeface area, and a self-excited energy limited release circuit is provided in parallel with the magnet to release the energy stored in the magnet. 1. A printing device comprising a control circuit section for controlling energy release by a limited release circuit to be enabled after the constant current supply period has elapsed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22928982A JPS59123686A (en) | 1982-12-29 | 1982-12-29 | printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22928982A JPS59123686A (en) | 1982-12-29 | 1982-12-29 | printing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59123686A JPS59123686A (en) | 1984-07-17 |
| JPH0245990B2 true JPH0245990B2 (en) | 1990-10-12 |
Family
ID=16889785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22928982A Granted JPS59123686A (en) | 1982-12-29 | 1982-12-29 | printing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59123686A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS612571A (en) * | 1984-06-15 | 1986-01-08 | Brother Ind Ltd | Driving circuit for printing wire in dot printer |
| US5116533A (en) * | 1990-04-05 | 1992-05-26 | William Grandmont | Phosphorescent marking material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5910315B2 (en) * | 1978-04-06 | 1984-03-08 | 株式会社リコー | Printing hammer drive control device for impact printers |
-
1982
- 1982-12-29 JP JP22928982A patent/JPS59123686A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59123686A (en) | 1984-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS58160169A (en) | Thermal printer | |
| US8456498B2 (en) | Printing apparatus | |
| JPH0245990B2 (en) | ||
| JPS644524Y2 (en) | ||
| SU1548084A1 (en) | Method of controlling stepping motor of printer type-carrier | |
| JP2002086768A (en) | Impact printer head drive circuit | |
| JPH0613223B2 (en) | Printer drive controller | |
| JP3004540B2 (en) | Impact print head drive circuit | |
| JP2988069B2 (en) | Serial printer | |
| JPH0116610Y2 (en) | ||
| JPH0410434B2 (en) | ||
| JP3307559B2 (en) | Driving method of wire impact type print head | |
| JP3284471B2 (en) | Wire impact printer | |
| KR101050316B1 (en) | Control method of driving power of thermal print head | |
| JPS58136469A (en) | Print magnet driving system | |
| JPS60222272A (en) | Hammer-driving circuit for type printer | |
| JPH0313353A (en) | impact dot head | |
| JPS6315924Y2 (en) | ||
| JPS6016735B2 (en) | electromagnet drive device | |
| JP4496699B2 (en) | Impact printer head drive circuit | |
| JPH03177911A (en) | Control system for current limiting element | |
| JP2910146B2 (en) | Printer and control method thereof | |
| JPH05204221A (en) | Image forming device | |
| JPS62251167A (en) | Serial printer | |
| JPH0974749A (en) | Recording device |