JPS6271653U - - Google Patents
Info
- Publication number
- JPS6271653U JPS6271653U JP16231085U JP16231085U JPS6271653U JP S6271653 U JPS6271653 U JP S6271653U JP 16231085 U JP16231085 U JP 16231085U JP 16231085 U JP16231085 U JP 16231085U JP S6271653 U JPS6271653 U JP S6271653U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heater
- fixing device
- heat
- sensitive element
- 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 description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fixing For Electrophotography (AREA)
Description
第１図は本考案による定着器のオーバーヒート
検知回路の基本概念を示す概略ブロツク図、第２
図は同ブロツク図である。
１：温度検知器、１ａ：サーミスタ、２：温度
制御回路、３：定着器用ヒータ装置、４：オーバ
ーヒート検出回路、５：基準電圧発生回路、２１
：Ａ／Ｄ変換器、２２：マイクロコンピユータ、
２３：出力ポート、２４：ドライバ、３１：ＳＳ
Ｒ、３２：ヒータ、４１：コンパレータ、４２：
ドライバ、４３：リレー、４３ａ：コイル、４３
ｂ：ブレーク接点、４４：ＬＥＤ、Ｒ１〜Ｒ４：
抵抗器。
Figure 1 is a schematic block diagram showing the basic concept of the fuser overheat detection circuit according to the present invention.
The figure is the same block diagram. 1: Temperature detector, 1a: Thermistor, 2: Temperature control circuit, 3: Fixing device heater device, 4: Overheat detection circuit, 5: Reference voltage generation circuit, 21
: A/D converter, 22: Microcomputer,
23: Output port, 24: Driver, 31: SS
R, 32: Heater, 41: Comparator, 42:
Driver, 43: Relay, 43a: Coil, 43
b: Break contact, 44: LED, R1 to R4:
Resistor.
Claims (1)
子で検知し、この感熱素子から温度に応じて発生
するアナログ電圧をデジタル信号に変換してマイ
クロコンピユータに供給し、このマイクロコンピ
ユータにより上記定着器の温度が所定の設定温度
となるように上記ヒータへの通電を制御する定着
器の温度制御回路において、上記マイクロコンピ
ユータとは独立に上記感熱素子からのアナログ電
圧をオーバーヒート検出用の基準電圧と比較し、
上記定着器のオーバーヒート時に上記ヒータへの
通電を強制的に停止する手段を設けたことを特徴
とする定着器のオーバーヒート検知回路。 The temperature of the fuser heated by the heater is detected by a heat-sensitive element, and the analog voltage generated from the heat-sensitive element according to the temperature is converted into a digital signal and supplied to a microcomputer, which then detects the temperature of the fuser. In the temperature control circuit of the fixing device that controls energization of the heater so that the temperature reaches a predetermined set temperature, the analog voltage from the heat-sensitive element is compared with a reference voltage for overheat detection independently of the microcomputer,
An overheat detection circuit for a fixing device, comprising means for forcibly stopping power supply to the heater when the fixing device overheats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16231085U JPS6271653U (en) | 1985-10-22 | 1985-10-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16231085U JPS6271653U (en) | 1985-10-22 | 1985-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6271653U true JPS6271653U (en) | 1987-05-07 |
Family
ID=31089450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16231085U Pending JPS6271653U (en) | 1985-10-22 | 1985-10-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6271653U (en) |
-
1985
- 1985-10-22 JP JP16231085U patent/JPS6271653U/ja active Pending
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