JPH0417948U - - Google Patents
Info
- Publication number
- JPH0417948U JPH0417948U JP5727490U JP5727490U JPH0417948U JP H0417948 U JPH0417948 U JP H0417948U JP 5727490 U JP5727490 U JP 5727490U JP 5727490 U JP5727490 U JP 5727490U JP H0417948 U JPH0417948 U JP H0417948U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- turned
- transistor
- drive transistor
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Impact Printers (AREA)
Description
第１図は、本考案の一実施例を示す回路図、第
２図は、第１図の回路による動作を示すタイムチ
ヤート図、第３図は、バネチヤージ式の印字ヘツ
ドの一例を示す概略断面図、第４図は、第３図の
印字ヘツドにおける従来の一般的な駆動回路図、
そして、第５図は、第４図の回路による動作を示
すタイムチヤート図である。
１０１……第１の駆動用トランジスタ、１０２
……第２の駆動用トランジスタ、１０３……第３
の駆動用トランジスタ、１０４……コイル、１０
５……コンデンサ、１０６……放電回路、Ｖ……
印加電圧。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a time chart showing the operation of the circuit shown in FIG. 1, and FIG. 3 is a schematic cross-section showing an example of a spring charge type print head. 4 is a conventional general drive circuit diagram for the print head shown in FIG.
FIG. 5 is a time chart showing the operation of the circuit of FIG. 4. 101...first driving transistor, 102
...Second driving transistor, 103...Third
driving transistor, 104...coil, 10
5... Capacitor, 106... Discharge circuit, V...
Applied voltage.
Claims (1)
端に第２の駆動用トランジスタを接続し、所定の
タイミングでコイルを駆動する印字ヘツドの駆動
回路において、 放電回路と接続のコンデンサを電源に接続し、
このコンデンサに接続された第３の駆動用トラン
ジスタの出力端子を前記コイルと第１の駆動用ト
ランジスタとの接続端子に接続し、そして、先ず
、第２と第３の駆動用トランジスタを同時にオン
とし、所定時間経過した後、第３の駆動用トラン
ジスタをオフすると共に第１の駆動用トランジス
タをオンとして切替え制御するようにしたことを
特徴とする印字ヘツドの駆動回路。[Claims for Utility Model Registration] In a print head drive circuit that connects a first drive transistor to one end of a coil and a second drive transistor to the other end and drives the coil at a predetermined timing, a discharge circuit and Connect the connecting capacitor to the power supply,
The output terminal of the third driving transistor connected to this capacitor is connected to the connection terminal between the coil and the first driving transistor, and first, the second and third driving transistors are turned on simultaneously. A print head drive circuit characterized in that after a predetermined period of time has elapsed, the third drive transistor is turned off and the first drive transistor is turned on for switching control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5727490U JPH0417948U (en) | 1990-06-01 | 1990-06-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5727490U JPH0417948U (en) | 1990-06-01 | 1990-06-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0417948U true JPH0417948U (en) | 1992-02-14 |
Family
ID=31581837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5727490U Pending JPH0417948U (en) | 1990-06-01 | 1990-06-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0417948U (en) |
-
1990
- 1990-06-01 JP JP5727490U patent/JPH0417948U/ja active Pending
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