JPS62128839U - - Google Patents
Info
- Publication number
- JPS62128839U JPS62128839U JP1570586U JP1570586U JPS62128839U JP S62128839 U JPS62128839 U JP S62128839U JP 1570586 U JP1570586 U JP 1570586U JP 1570586 U JP1570586 U JP 1570586U JP S62128839 U JPS62128839 U JP S62128839U
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- temperature
- switch
- power supply
- temperature detector
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案のサーマルヘツド駆動装置の実
施例を示すブロツク図、第２図と第３図とは、そ
の制御回路の具体的な実施例を示す結線図、第４
図は本考案のサーマルヘツド駆動装置の動作を説
明するグラフ、第５図は本考案の実施に適する複
写装置の概略図である。
１０……サーマルヘツド、１２……温度検出器
、１３……電源回路、１４……スイツチ、１５…
…制御回路。
FIG. 1 is a block diagram showing an embodiment of the thermal head driving device of the present invention, FIGS. 2 and 3 are wiring diagrams showing a specific embodiment of the control circuit, and FIG.
The figure is a graph explaining the operation of the thermal head driving device of the present invention, and FIG. 5 is a schematic diagram of a copying machine suitable for implementing the present invention. 10...Thermal head, 12...Temperature detector, 13...Power circuit, 14...Switch, 15...
...control circuit.
Claims (1)
と、この電源回路とサーマルヘツドの間に挿入さ
れたスイツチと、前記サーマルヘツドの温度を検
出する温度検出器と、この温度検出器の検出信号
を受け入れて、前記スイツチのオンオフを制御す
る制御回路とから成り、この制御回路は、前記温
度検出器の検出信号を監視して、その温度が所定
値を越えたときか、または、その温度の上昇率が
一定値以上となつたとき、前記スイツチをオンか
らオフに切り換えて、前記サーマルヘツドへの電
力の供給を遮断することを特徴とするサーマルヘ
ツド駆動装置。 A power supply circuit that supplies drive power to the thermal head, a switch inserted between the power supply circuit and the thermal head, a temperature detector that detects the temperature of the thermal head, and a switch that receives the detection signal of the temperature detector. , and a control circuit that controls the on/off of the switch, and this control circuit monitors the detection signal of the temperature detector and detects when the temperature exceeds a predetermined value or when the rate of increase of the temperature is A thermal head driving device characterized in that when the temperature exceeds a certain value, the switch is turned from on to off to cut off power supply to the thermal head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1570586U JPS62128839U (en) | 1986-02-07 | 1986-02-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1570586U JPS62128839U (en) | 1986-02-07 | 1986-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62128839U true JPS62128839U (en) | 1987-08-14 |
Family
ID=30806884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1570586U Pending JPS62128839U (en) | 1986-02-07 | 1986-02-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62128839U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6485780A (en) * | 1987-09-29 | 1989-03-30 | Toshiba Corp | Thermal head protection device |
-
1986
- 1986-02-07 JP JP1570586U patent/JPS62128839U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6485780A (en) * | 1987-09-29 | 1989-03-30 | Toshiba Corp | Thermal head protection device |