JPH03112769U - - Google Patents
Info
- Publication number
- JPH03112769U JPH03112769U JP1979690U JP1979690U JPH03112769U JP H03112769 U JPH03112769 U JP H03112769U JP 1979690 U JP1979690 U JP 1979690U JP 1979690 U JP1979690 U JP 1979690U JP H03112769 U JPH03112769 U JP H03112769U
- Authority
- JP
- Japan
- Prior art keywords
- thermistor
- connector
- switching element
- terminal
- turned
- 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
- 238000010438 heat treatment Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
Description
図はこの考案の実施例を示し、第１図は回路図
、第２図は定着ユニツトの側断面図、第３図はサ
ーミスタの温度対抵抗値特性を示す図、第４図は
制御状況のフローチヤートである。
１……定着ローラ、２……ヒータ、３……サー
ミスタ、１１……定着ユニツト、１２……温度制
御回路、１３……コネクタ、１６……マイクロコ
ンピユータ、１８……トランジスタ、ａ〜ｈ……
端子。
The figures show an embodiment of this invention; Fig. 1 is a circuit diagram, Fig. 2 is a side sectional view of the fixing unit, Fig. 3 is a diagram showing the temperature vs. resistance value characteristics of the thermistor, and Fig. 4 is a diagram showing the control situation. It is a flowchart. DESCRIPTION OF SYMBOLS 1... Fixing roller, 2... Heater, 3... Thermistor, 11... Fixing unit, 12... Temperature control circuit, 13... Connector, 16... Microcomputer, 18... Transistor, a to h...
terminal.
Claims (1)
スタを含む電気的各素子と温度制御回路とをコネ
クタを介して接続した加熱定着装置において、 前記サーミスタを接続するコネクタの端子と同
一コネクタかつ別個の端子を介して前記サーミス
タと並列に接続されるスイツチング素子と、該ス
イツチング素子をオン、オフ制御すると共に、前
記スイツチング素子をオンとしたときに前記サー
ミスタを接続するコネクタの端子を介して前記サ
ーミスタの端子電圧を取入れ、前記スイツチング
素子がオンとなつたときの端子電圧と比較し、該
比較結果により前記コネクタの接触不良検出を行
なう制御部とを設けたことを特徴とする加熱定着
装置。[Scope of Claim for Utility Model Registration] In a heating fixing device in which electrical elements including a thermistor of a fixing unit that performs fixing by heating and a temperature control circuit are connected via a connector, A switching element connected in parallel with the thermistor through a connector and a separate terminal, and a terminal of the connector that controls on/off of the switching element and connects the thermistor when the switching element is turned on. and a control section that receives the terminal voltage of the thermistor, compares it with the terminal voltage when the switching element is turned on, and detects a contact failure of the connector based on the comparison result. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979690U JPH03112769U (en) | 1990-02-28 | 1990-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979690U JPH03112769U (en) | 1990-02-28 | 1990-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03112769U true JPH03112769U (en) | 1991-11-18 |
Family
ID=31522900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979690U Pending JPH03112769U (en) | 1990-02-28 | 1990-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03112769U (en) |
-
1990
- 1990-02-28 JP JP1979690U patent/JPH03112769U/ja active Pending
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