JPH0191922U - - Google Patents
Info
- Publication number
- JPH0191922U JPH0191922U JP18865087U JP18865087U JPH0191922U JP H0191922 U JPH0191922 U JP H0191922U JP 18865087 U JP18865087 U JP 18865087U JP 18865087 U JP18865087 U JP 18865087U JP H0191922 U JPH0191922 U JP H0191922U
- Authority
- JP
- Japan
- Prior art keywords
- temperature detection
- detection element
- temperature
- input signal
- output
- 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 5
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Temperature (AREA)
Description
第１図は実施例の回路図、第２図は第１図の温
度制御装置を使用する定着器の構成図、第３図ａ
〜ｅは第１図の実施例の各部の波形を示すタイム
チヤート、第４図は他の実施例の温度制御装置の
回路図、第５図は従来例の定着器の温度制御装置
を示す回路図である。
１……定着器、５……ヒータ、６……サーミス
タ、８，１１……比較回路、９……ＳＳＲ、１２
……ＭＭＢ回路、１３……ＣＰＵ、Ｑ３，Ｑ４，
Ｑ５……トランジスタ。
Fig. 1 is a circuit diagram of an embodiment, Fig. 2 is a configuration diagram of a fixing device using the temperature control device shown in Fig. 1, and Fig. 3 a.
-e are time charts showing waveforms of various parts in the embodiment of FIG. 1, FIG. 4 is a circuit diagram of a temperature control device of another embodiment, and FIG. 5 is a circuit showing a temperature control device of a conventional fixing unit. It is a diagram. 1...Fuser, 5...Heater, 6...Thermistor, 8, 11...Comparison circuit, 9...SSR, 12
...MMB circuit, 13...CPU, Q 3 , Q 4 ,
Q5 ...Transistor.
Claims (1)
出素子と、 該温度検出素子と直列に接続されるとともに所
定の周期で供給される入力信号に従つて作動する
スイツチ素子と、 前記温度検出素子の出力を積分する積分回路と
、 該積分回路の出力に応じて前記定着部の加熱用
ヒータの通電を制御する制御手段と、 前記入力信号のデユーテイを変更する手段と、 前記温度検出素子と前記スイツチ素子との接続
部におけるパルス信号がない場合に前記加熱用ヒ
ータの通電を禁止する禁止手段とを備えたことを
特徴とする定着部の温度制御装置。[Claims for Utility Model Registration] A temperature detection element whose resistance value changes depending on the temperature of the fixing section; and a temperature detection element connected in series with the temperature detection element and operated in accordance with an input signal supplied at a predetermined cycle. a switch element; an integrating circuit that integrates the output of the temperature detection element; a control unit that controls energization of the heater of the fixing unit according to the output of the integrating circuit; and a unit that changes the duty of the input signal. A temperature control device for a fixing unit, comprising: a prohibition means for prohibiting energization of the heating heater when there is no pulse signal at a connection portion between the temperature detection element and the switch element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18865087U JPH0191922U (en) | 1987-12-11 | 1987-12-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18865087U JPH0191922U (en) | 1987-12-11 | 1987-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0191922U true JPH0191922U (en) | 1989-06-16 |
Family
ID=31479728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18865087U Pending JPH0191922U (en) | 1987-12-11 | 1987-12-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0191922U (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58105272A (en) * | 1981-12-18 | 1983-06-23 | Fuji Xerox Co Ltd | Temperature controller of fixation device in copying machine |
| JPS58174977A (en) * | 1982-04-07 | 1983-10-14 | Canon Inc | Temperature adjusting circuit of heat fixation device |
| JPS58176559A (en) * | 1982-04-09 | 1983-10-17 | Fuji Xerox Co Ltd | Detecting device for disconnection of sensor |
| JPS61211979A (en) * | 1985-03-18 | 1986-09-20 | 株式会社東芝 | Temperature controller |
| JPS6242177A (en) * | 1985-08-20 | 1987-02-24 | Fujitsu Ltd | Prevention system for overheating of heater |
-
1987
- 1987-12-11 JP JP18865087U patent/JPH0191922U/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58105272A (en) * | 1981-12-18 | 1983-06-23 | Fuji Xerox Co Ltd | Temperature controller of fixation device in copying machine |
| JPS58174977A (en) * | 1982-04-07 | 1983-10-14 | Canon Inc | Temperature adjusting circuit of heat fixation device |
| JPS58176559A (en) * | 1982-04-09 | 1983-10-17 | Fuji Xerox Co Ltd | Detecting device for disconnection of sensor |
| JPS61211979A (en) * | 1985-03-18 | 1986-09-20 | 株式会社東芝 | Temperature controller |
| JPS6242177A (en) * | 1985-08-20 | 1987-02-24 | Fujitsu Ltd | Prevention system for overheating of heater |
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