JPS6377746U - - Google Patents

Info

Publication number
JPS6377746U
JPS6377746U JP17373386U JP17373386U JPS6377746U JP S6377746 U JPS6377746 U JP S6377746U JP 17373386 U JP17373386 U JP 17373386U JP 17373386 U JP17373386 U JP 17373386U JP S6377746 U JPS6377746 U JP S6377746U
Authority
JP
Japan
Prior art keywords
strobe signal
head
timer circuit
printer
drive
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
JP17373386U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP17373386U priority Critical patent/JPS6377746U/ja
Publication of JPS6377746U publication Critical patent/JPS6377746U/ja
Pending legal-status Critical Current

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  • Accessory Devices And Overall Control Thereof (AREA)
  • Electronic Switches (AREA)

Description

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

第１図は本考案のタイマー回路の１例であり、
第２図は従来のドライバＩＣの回路図であり、第
３図は本考案の回路を実装したサーマルヘツドの
１例であり、第４図は本考案のタイマー回路を内
蔵したドライバＩＣの回路例である。 １……シフトレジスタ、２……ラツチ、３……
ゲート、８……タイマー回路。 Figure 1 shows an example of the timer circuit of the present invention.
Figure 2 is a circuit diagram of a conventional driver IC, Figure 3 is an example of a thermal head incorporating the circuit of the present invention, and Figure 4 is a circuit example of a driver IC incorporating the timer circuit of the present invention. It is. 1...Shift register, 2...Latch, 3...
Gate, 8...Timer circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] プリンテイングヘツドの通電により印字を制御
するプリンタにおいて、ヘツドをドライブする複
数のドライブトランジスタ、前記ドライブトラン
ジスタの通電を制御するストローブ信号の入力端
子、前記ストローブ信号の有効時間を制限するタ
イマー回路とを備え、ストローブ信号がアクテイ
ブになり続けた場合に、前記タイマー回路を介し
て通電を停止させるようにした事を特徴とするプ
リンタ用ヘツドの過熱防止回路。 A printer that controls printing by energizing a printing head, comprising a plurality of drive transistors that drive the head, a strobe signal input terminal that controls energization of the drive transistors, and a timer circuit that limits the validity period of the strobe signal. . An overheat prevention circuit for a printer head, characterized in that if a strobe signal continues to be active, electricity is stopped via the timer circuit.
JP17373386U 1986-11-12 1986-11-12 Pending JPS6377746U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17373386U JPS6377746U (en) 1986-11-12 1986-11-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17373386U JPS6377746U (en) 1986-11-12 1986-11-12

Publications (1)

Publication Number Publication Date
JPS6377746U true JPS6377746U (en) 1988-05-23

Family

ID=31111471

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17373386U Pending JPS6377746U (en) 1986-11-12 1986-11-12

Country Status (1)

Country Link
JP (1) JPS6377746U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63267570A (en) * 1987-04-27 1988-11-04 Tokyo Electric Co Ltd Protection circuit of thermal head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116554A (en) * 1984-11-13 1986-06-04 Nec Corp Thermal recording apparatus
JPS61172756A (en) * 1985-01-28 1986-08-04 Canon Inc Thermal recording apparatus
JPS61239963A (en) * 1985-04-18 1986-10-25 Fuji Xerox Co Ltd Apparatus for driving thermal head

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116554A (en) * 1984-11-13 1986-06-04 Nec Corp Thermal recording apparatus
JPS61172756A (en) * 1985-01-28 1986-08-04 Canon Inc Thermal recording apparatus
JPS61239963A (en) * 1985-04-18 1986-10-25 Fuji Xerox Co Ltd Apparatus for driving thermal head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63267570A (en) * 1987-04-27 1988-11-04 Tokyo Electric Co Ltd Protection circuit of thermal head

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