JPH042643U - - Google Patents
Info
- Publication number
- JPH042643U JPH042643U JP4383390U JP4383390U JPH042643U JP H042643 U JPH042643 U JP H042643U JP 4383390 U JP4383390 U JP 4383390U JP 4383390 U JP4383390 U JP 4383390U JP H042643 U JPH042643 U JP H042643U
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- thermal
- control circuit
- output
- detection means
- 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 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000004040 coloring Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Electronic Switches (AREA)
Description
第１図は、本考案の一実施例によるサーマルプ
リンタの発熱素子印加電圧の遮断および復帰手段
の主要な構成を示すブロツク図、第２図は、サー
ミスタを取り付けたサーマルプリントヘツドを示
す側面図、第３図ａ及びｂは、従来例である温度
ヒユーズを取り付けたサーマルプリントヘツドを
示しており、ａ図は外観図、ｂ図は等価回路図で
ある。
１０……サーマルプリントヘツド、１２……発
熱抵抗素子列、１４……サーマルヘツド温度検出
用サーミスタ、１５……環境温度検出用サーミス
タ、６２……温度ヒユーズ、１００……印加電圧
遮断・復帰手段、１１０……印加電圧遮断・復
帰手段、１２０……差動増幅器。
FIG. 1 is a block diagram showing the main structure of a means for interrupting and restoring the voltage applied to a heating element of a thermal printer according to an embodiment of the present invention, and FIG. 2 is a side view showing a thermal print head equipped with a thermistor. Figures 3a and 3b show a conventional thermal print head equipped with a temperature fuse, with figure a being an external view and figure b being an equivalent circuit diagram. 10... Thermal print head, 12... Heat generating resistor element array, 14... Thermistor for thermal head temperature detection, 15... Thermistor for environmental temperature detection, 62... Temperature fuse, 100... Applied voltage cutoff/return means, 110...Applied voltage cutoff/reset means, 120...Differential amplifier.
Claims (1)
で対応する複数の発熱抵抗素子に通電さる制御回
路を有し、この制御回路による発熱抵抗素子への
通電によつて、感熱紙を発色させるあるいはイン
クシートに塗布された色材を記録紙上に転写する
サーマルプリンタにおいて、 発熱抵抗素子が形成されているサーマルヘツド
に取り付けられたサーマルヘツド温度検出手段の
出力から求められるサーマルヘツド温度が許容温
度を越えた場合に前記制御回路とは無関係に発熱
素子への印加電圧を遮断する手段を具備すること
を特徴とするサーマルプリンタ。 (2) 前記サーマルヘツド温度検出手段による検
出温度が基準温度以下になつた場合に遮断されて
いる発熱素子印加電圧を復帰する手段を具備する
ことを特徴とする実用新案登録請求の範囲第１項
記載のサーマルプリンタ。 (3) 前記サーマルヘツド温度検出手段の出力と
装置内に取り付けられた環境温度検出手段の出力
を比較し求められたサーマルヘツド温度上昇量が
許容温度上昇量を越えた場合に制御回路とは無関
係に発熱素子印加電圧を遮断する手段を具備する
ことを特徴とする実用新案登録請求の範囲第１項
記載のサーマルプリンタ。 (4) 前記サーマルヘツド温度検出手段の出力と
前記環境温度検出手段の出力を比較し求められる
サーマルヘツド温度上昇量が基準温度上昇量以内
になつた場合に遮断されている発熱素子印加電圧
を復帰する手段を具備することを特徴とする実用
新案登録請求の範囲第１項記載のサーマルプリン
タ。[Claims for Utility Model Registration] (1) One-to-one for multiple pixels on one printing line
The control circuit has a control circuit that energizes a plurality of corresponding heat-generating resistive elements, and by energizing the heat-generating resistive elements by this control circuit, the thermal paper is colored or the coloring material applied to the ink sheet is transferred onto the recording paper. In a thermal printer, when the thermal head temperature determined from the output of the thermal head temperature detecting means attached to the thermal head in which the heating resistor element is formed exceeds the permissible temperature, the heating element is turned on regardless of the control circuit. A thermal printer characterized by comprising means for cutting off an applied voltage. (2) Utility model registration claim 1, characterized in that the utility model is provided with means for restoring the voltage applied to the heating element which has been cut off when the temperature detected by the thermal head temperature detection means falls below a reference temperature. Thermal printer listed. (3) If the thermal head temperature increase determined by comparing the output of the thermal head temperature detection means and the output of the environmental temperature detection means installed in the device exceeds the permissible temperature increase, the control circuit is unrelated. The thermal printer according to claim 1, further comprising means for cutting off the voltage applied to the heating element. (4) Compare the output of the thermal head temperature detection means with the output of the environmental temperature detection means and restore the voltage applied to the heating element which has been cut off when the thermal head temperature rise amount determined is within the reference temperature rise amount. A thermal printer according to claim 1, characterized in that the thermal printer is provided with means for:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4383390U JPH042643U (en) | 1990-04-24 | 1990-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4383390U JPH042643U (en) | 1990-04-24 | 1990-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH042643U true JPH042643U (en) | 1992-01-10 |
Family
ID=31556589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4383390U Pending JPH042643U (en) | 1990-04-24 | 1990-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042643U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348176U (en) * | 1976-09-28 | 1978-04-24 |
-
1990
- 1990-04-24 JP JP4383390U patent/JPH042643U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348176U (en) * | 1976-09-28 | 1978-04-24 |
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