JPH0250845A - Head driving circuit of printer - Google Patents

Head driving circuit of printer

Info

Publication number
JPH0250845A
JPH0250845A JP20145888A JP20145888A JPH0250845A JP H0250845 A JPH0250845 A JP H0250845A JP 20145888 A JP20145888 A JP 20145888A JP 20145888 A JP20145888 A JP 20145888A JP H0250845 A JPH0250845 A JP H0250845A
Authority
JP
Japan
Prior art keywords
coil
data signal
transistor
head
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.)
Pending
Application number
JP20145888A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ota
太田　良昭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP20145888A priority Critical patent/JPH0250845A/en
Publication of JPH0250845A publication Critical patent/JPH0250845A/en
Pending legal-status Critical Current

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
    • B41J2/30—Control circuits for actuators

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE:To prevent the exhaustion of paper by controlling the printing pressure of an underline at the time of printing of a character with an underline by setting a drive part for an underline exclusive printing head to a separate circuit for imparting an exclusive common signal to perform control. CONSTITUTION:The first coil C1 is the driving coil of the first head pin and both terminals thereof are connected to the collector of the transistor 1 of the first common signal driving part and the collector of the transistor TR1 of the first data signal driving part. In the same way, the (n-1)-th coil Cn-1 drives the (n-1)-th head pin and both terminals thereof are connected to the collector of the transistor 1 of the first common signal driving part and the collector of the transistor TRn-1 of the (n-1)-th data signal driving part. A coil Cn is drives the n-th head pin exclusive to underline printing and both terminals thereof are connected to the collector of the transistor 2 being the second common signal driving part for an underline and the collector of the transistor TRn of the n-th data signal driving part for an underline.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は情報処理装置の出力機器などに多用されるプリ
ンタのヘッド駆動回路に関し、特にアンダラインの印字
に際し用紙を破損するおそれがないプリンタのヘッド駆
動回路に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a head drive circuit for a printer that is often used as an output device of an information processing device, and in particular to a head drive circuit for a printer that does not cause damage to paper when printing underlines. This invention relates to a head drive circuit.

（従来の技術） 従来、この種のプリンタのヘッド駆動回路は、ヘッドピ
ンを駆動するコイルに流す電流を、それぞれデータ信号
でコイル端子の片方の回路をオンマオフし、コイルの他
方の回路はすべて共通のコモン信号で１個のコモン信号
駆動回路によりオン、オフしている。(Prior Art) Conventionally, in the head drive circuit of this type of printer, the current flowing through the coil that drives the head pin is turned off at one circuit of the coil terminal using a data signal, and the other circuit of the coil is all connected to a common circuit. It is turned on and off by one common signal drive circuit using a common signal.

（発明が解決しようとする課題） 上述した従来のプリンタのヘッド、駆動回路は、ヘツ□
ドビンを駆動するコイルに流す電流のコモン信号による
制御がすべて同一であるので、アングライン付きの文字
を印字するとき、アングライン印字ピンの印字圧が強過
ぎる。したがって、アングラインの卵子によって用紙が
破損することがあるという欠点がある。(Problems to be Solved by the Invention) The conventional printer head and drive circuit described above are
Since all the currents flowing through the coils that drive the dobbins are controlled by the same common signal, when printing characters with an angline, the printing pressure of the angline printing pin is too strong. Therefore, there is a drawback that the paper may be damaged by Angrain eggs.

本発明の目的は、このような欠点を解消し、アングライ
ンのみの印字圧を小さくして、アングライン印字による
用紙破損がないように改良されたプリンタのヘッド駆動
回路を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an improved head drive circuit for a printer that eliminates such drawbacks, reduces the printing pressure only for underground printing, and prevents paper damage due to underground printing.

（課題を解決するための手段） 前記の目的を達成するため、本発明のプリンタのヘッド
駆動回路は、総数ｎ個の印字用ヘッドビンを有するプリ
ンタのヘッド駆動回路において、第１のヘッドピン、第
２のヘッドピン〜第ｎ−１のヘッドピンのそれぞれのへ
ラドビンを駆動する第１のコイルＣ１、第２のコイルＣ
２〜第ｎ　−ｌのコイルＣｎ−１のそれぞわのコイルに
流す電流を、共通の第１のコモン信号で制御する第１の
コモン信号駆動部１と、第１のコイルＣ１、第２のコイ
ルＣ７〜第ｎ　−１のコイルＣｎ−０のそれぞれのコイ
ルに流す電流を、それぞれ第１のデータ信号、第２のデ
ータ信号〜第ｎ　−１のデータ信号で制御する第１のデ
ータ信号駆動部ＴＲ，，、第２のデータ信号駆動部ＴＲ
。(Means for Solving the Problems) In order to achieve the above object, a head drive circuit for a printer according to the present invention has a head drive circuit for a printer having a total number of n printing head bins. The first coil C1 and the second coil C drive the respective head pins of the head pin to the n-1th head pin.
A first common signal drive section 1 that controls the current flowing through each of the second to n-lth coils Cn-1 using a common first common signal; A first data signal that controls the current flowing through each of the coils C7 to Cn-0, using the first data signal and the second data signal to the n-1 data signal, respectively. Drive unit TR, , second data signal drive unit TR
.

〜第ｎ−１のデータ信号駆動部ＴＲｎ−０からなるデー
タ信号駆動群と、第ｎのヘッドピンを駆動する第ｎのコ
イルＣｎに流れる電流を第２のコモン信号により制御す
る第２のコモン信号駆動部と、第ｎのコイルＣｎに流れ
る電流を第ｎのデータ信号により制御する第ｎのデータ
信号駆動部ＴＲｎを備えた構成とする。A second common signal that controls the current flowing through the data signal drive group consisting of the ~n-1st data signal drive unit TRn-0 and the nth coil Cn that drives the nth head pin, using a second common signal. The configuration includes a driver and an n-th data signal driver TRn that controls the current flowing through the n-th coil Cn using an n-th data signal.

（実施例） つぎに、本発明について図面を参照して説明する。(Example) Next, the present invention will be explained with reference to the drawings.

第１図は、本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing one embodiment of the present invention.

第１図において、第１のコイルＣＩは、図示しない第１
のヘッドピンを駆動するコイルで、その両端は第１のコ
モン信号駆動部のトランジスタ１のコレクタと第１のデ
ータ信号駆動部のトランジスタＴＲ１のコレクタに接続
されている。In FIG. 1, a first coil CI is connected to a first coil CI (not shown).
The coil drives the head pin of the head pin, and both ends thereof are connected to the collector of the transistor 1 of the first common signal driver and the collector of the transistor TR1 of the first data signal driver.

第２のコイルＣ１は、図示しない第２のへラドビンを駆
動するコイルで、その両端は第１のコモン信号駆動部の
トランジスタのコレクタと第２のデータ信号駆動部のト
ランジスタＴＲ。The second coil C1 is a coil for driving a second heradbin (not shown), and its both ends are connected to the collector of the transistor of the first common signal driver and the transistor TR of the second data signal driver.

のコレクタに接続されている。以下同様にして第ｎ−１
のコイルＣｎ−１は、図示しない第ｎ　−１のヘッドビ
ンを駆動し、その両端は第１のコモン信号駆動部のトラ
ンジスタ１のコレクタと第ｎ−１のデータ信号駆動部の
トランジスタＴＲｎ−１のコレクタに接続されている。connected to the collector. Similarly, the n-1th
The coil Cn-1 drives the n-1th head bin (not shown), and its both ends are connected to the collector of the transistor 1 of the first common signal driving section and the transistor TRn-1 of the n-1th data signal driving section. connected to the collector.

そしてデータ信号駆動群のトランジスタＴＲ，、。and transistors TR, . . . of the data signal drive group.

ＴＲ，〜ＴＲｎ−１のベースにはそれぞれ第１のデータ
信号、第２のデータ信号〜第ｎ−１のデータ信号が入力
され、トランジスタ１には共通のコモン信号である第１
のコモン信号が入力される。The first data signal and the second data signal to the (n-1)th data signal are input to the bases of TR, ~TRn-1, respectively, and the first data signal, which is a common signal, is input to the transistor 1.
A common signal is input.

一方コイルＣｎはアングライン印字専用の図示しない第
ｎのヘッドピンを駆動するもので、その両端は、アング
ライン用の第２のコモン信号の駆動部であるトランジス
タ２のコレクタと、アングライン用の第ｎのデータ信号
Ｔ′ＢＪｎのコレクタに接続されている。On the other hand, the coil Cn drives an nth head pin (not shown) dedicated to Angline printing, and its both ends are connected to the collector of the transistor 2, which is a drive section of the second common signal for Angline, and the n data signal T'BJn collector.

なおＶ。０は本実施例に供給される電源電圧である。Furthermore, V. 0 is the power supply voltage supplied to this embodiment.

第２図は、第１図の実施例のアングライン無しの通常文
字の印字時の入力信号とコイル電流の関係を示すタイム
チャート例である。FIG. 2 is an example of a time chart showing the relationship between the input signal and the coil current during printing of normal characters without angle lines in the embodiment shown in FIG.

第３図は、第１図の実施例のアングライン付き文字の印
字時の入力信号とコイル電流の関係を示すタイムチャー
ト例である。FIG. 3 is an example of a time chart showing the relationship between the input signal and the coil current when printing characters with angle lines in the embodiment shown in FIG.

第２図に示すように、アングライン無しの通常文字の印
字の場合は、第１のコモン信号によりトランジスタ１は
同図（→の時間Ｔ１の間オン状態となり、第１〜第ｎ−
１のデータ信号によりオン状態となるトランジスタはす
べて同図（ｂ）の時間Ｔ、の間オン状態となるので、駆
動されるコイルに流れる電流波形は、いずれも同図（Ｃ
）に示すような波形となる。As shown in FIG. 2, in the case of printing normal characters without an angle line, the first common signal turns on the transistor 1 for the time T1 shown in the figure (→), and the first to n-th
All the transistors that are turned on by the data signal No. 1 are turned on for the time T shown in FIG.
) is the waveform shown.

アングライン付き文字の印字の場合は、第３図に示すよ
うに、アングライン用の印字ビンを駆動するコイルＣｎ
以外のコイルｃ、−ｃｎ−１については、これらのコイ
ルに流れる電流を制御する信号の波形が同図（ａ）およ
び（ｂ）に示すように、第２図の（匈およびΦ）と同様
であるので、コモン信号によって動作するトランジスタ
のオン状態は時間Ｔ１続き、データ信号によって動作す
るトランジスタのオン状態は時間Ｔ、続く。In the case of printing characters with an angline, as shown in FIG.
As for the other coils c and -cn-1, the waveforms of the signals that control the current flowing through these coils are the same as (匈 and Φ) in Figure 2, as shown in (a) and (b) of the same figure. Therefore, the on state of the transistor operated by the common signal lasts for a time T1, and the on state of the transistor operated by the data signal lasts for a time T.

したがって第３図（Ｃ）に示すような電流がコイルＣ１
〜Ｃｎ−１のうちの駆動されるものすべてに流れ、アン
グライン無しの場合と同様な圧力で印字される。Therefore, the current as shown in Fig. 3(C) flows through the coil C1.
~Cn-1 flows to all driven parts, and printing is performed with the same pressure as in the case without Angline.

一方、アングライン用の印字ピンについては、コイルＣ
ｎに流れる電流を制御する信号は、第２のコモン信号が
トランジスタ２をオン状態にする時間は第３図（ｄ）の
ようにＴｌｌであり、第ｎのデータ信号がトランジスタ
ＴＲｎをオン状態にする時間は’Ｉ”ｔｔであるので、
コイルＣｎに流れる電流波形は第３図（０のようになる
。On the other hand, regarding the printing pin for Angline, coil C
As shown in FIG. 3(d), the time when the second common signal turns on the transistor 2 is Tll, and the time when the nth data signal turns on the transistor TRn. Since the time to do is 'I'tt,
The current waveform flowing through the coil Cn is as shown in Figure 3 (0).

したがって、第３図において時間ＴｌｌをＴ１より短か
く、また時間Ｔ１．をＴ、より短かくすることにより、
アングライン印字ヘッドピンを駆動するコイルＣｎに流
れる電流を減らし印字圧を小さくして、アングライン印
字による用紙の破損を防ぐことができる。Therefore, in FIG. 3, time Tll is shorter than T1, and time T1. By making T shorter,
By reducing the current flowing through the coil Cn that drives the underground print head pin and reducing the printing pressure, it is possible to prevent paper damage due to underground printing.

（発明の効果） 以上説明したように本発明は、アングライン専用の印字
ヘッド用駆動部を、専用のコモン信号を与えて制御する
別口路とすることにより、アングライン付き文字の印字
時に、アングラインの印字圧を調節して用紙切れを無く
すことができるという効果がある。(Effects of the Invention) As explained above, the present invention provides a separate path for controlling the print head drive section dedicated to the Angline by giving a dedicated common signal, so that when printing characters with an Angline, This has the effect of eliminating paper shortages by adjusting the printing pressure of the Angline.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の一実施例を示す回路図である。 第２図は、第１図の実施例のアングライン無しの文字印
字時の動作例を示すタイムチャートである。 第３図は、第１図の実施例のアングライン付き文字印字
時の動作例を示すタイムチャートである。 １・・・トランジスタ（第１のコモン信号駆動部）２・
・・トランジスタ（第２のコモン信号駆動部）ＴＲ１・
・・トランジスタ（第１のデータ信号駆動部） ＴＲ，・・・トランジスタ（第２のデータ信号駆動部） ＴＲ，−１・ｌ−ランジスタ（第ｎ−１のデータ信号駆
動部） ＴＲｎ・・・トランジスタ（第ｎのデータ信号駆動部） Ｃ１・・・第１のヘッドピン駆動用コイルＣ７・・・第
２のヘッドピン駆動用コイルＣｏ−１・・・第ｎ−１（
Ｄへラドビン駆動用コイルFIG. 1 is a circuit diagram showing one embodiment of the present invention. FIG. 2 is a time chart showing an example of the operation of the embodiment shown in FIG. 1 when printing characters without angle lines. FIG. 3 is a time chart showing an example of the operation of the embodiment shown in FIG. 1 when printing characters with angle lines. 1... Transistor (first common signal driver) 2.
・Transistor (second common signal driver) TR1・
. . . Transistor (first data signal driving section) TR, . . . Transistor (second data signal driving section) TR, -1.l-transistor (n-1st data signal driving section) TRn... Transistor (nth data signal driver) C1...First head pin drive coil C7...Second head pin drive coil Co-1...n-1st (
Radbin drive coil to D

Claims (1)

【特許請求の範囲】[Claims] 総数ｎ個の印字用ヘッドピンを有するプリンタのヘッド
駆動回路において、第１のヘッドピン、第２のヘッドピ
ン〜第ｎ−１のヘッドピンのそれぞれのヘッドピンを駆
動する第１のコイル、第２のコイル〜第ｎ−１のコイル
のそれぞれのコイルに流す電流を、共通の第１のコモン
信号で制御する第１のコモン信号駆動部と、前記第１の
コイル、第２のコイル〜第ｎ−１のコイルのそれぞれの
コイルに流す電流を、それぞれ第１のデータ信号、第２
のデータ信号〜第ｎ−１のデータ信号で制御する第１の
データ信号駆動部、第２のデータ信号駆動部〜第ｎ−１
のデータ信号駆動部からなるデータ信号駆動群と、第ｎ
のヘッドピンを駆動する第ｎのコイルに流れる電流を第
２のコモン信号により制御する第２のコモン信号駆動部
と、前記第ｎのコイルに流れる電流を第ｎのデータ信号
により制御する第ｎのデータ信号駆動部を備えたことを
特徴とするプリンタのヘッド駆動回路。In a head drive circuit of a printer having a total number of n printing head pins, a first coil, a second coil to an n-1th head pin, each driving a first head pin, a second head pin to an (n-1)th head pin, and a second coil to a second coil to drive each of the head pins. a first common signal drive unit that controls the current flowing through each of the n-1 coils using a common first common signal; and the first coil, the second coil to the n-1th coil. The currents flowing through the respective coils are the first data signal and the second data signal, respectively.
A first data signal driver controlled by the data signal to the n-1th data signal, and a second data signal driver to the n-1th data signal.
a data signal drive group consisting of data signal drive units of
a second common signal drive unit that controls the current flowing through the n-th coil that drives the head pin of the head pin using a second common signal; and A printer head drive circuit comprising a data signal drive section.
JP20145888A 1988-08-12 1988-08-12 Head driving circuit of printer Pending JPH0250845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20145888A JPH0250845A (en) 1988-08-12 1988-08-12 Head driving circuit of printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20145888A JPH0250845A (en) 1988-08-12 1988-08-12 Head driving circuit of printer

Publications (1)

Publication Number Publication Date
JPH0250845A true JPH0250845A (en) 1990-02-20

Family

ID=16441427

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20145888A Pending JPH0250845A (en) 1988-08-12 1988-08-12 Head driving circuit of printer

Country Status (1)

Country Link
JP (1) JPH0250845A (en)

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