JPS59229367A - Thermal printing head - Google Patents
Thermal printing headInfo
- Publication number
- JPS59229367A JPS59229367A JP10222183A JP10222183A JPS59229367A JP S59229367 A JPS59229367 A JP S59229367A JP 10222183 A JP10222183 A JP 10222183A JP 10222183 A JP10222183 A JP 10222183A JP S59229367 A JPS59229367 A JP S59229367A
- Authority
- JP
- Japan
- Prior art keywords
- heat generator
- temp
- printing
- heating element
- substrate
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/345—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads characterised by the arrangement of resistors or conductors
Landscapes
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は、熱印字ヘッドに関する。[Detailed description of the invention] The present invention relates to thermal printheads.
第１図は従来例の熱印字ヘッドを示し、同図（ａ）は一
部を切欠いた平面図であり、同図（ｂ）ＩＩ′ｉその側
面図である。絶縁性の基体１の表面には、発熱体２が形
成てれ、基体１の裏面には放熱板３が設けられる。基体
１の表面には、発熱体２を発熱させるための電流を制御
するための複数の電子部品４が取付けられ、保護カバー
５によって覆われる。FIG. 1 shows a conventional thermal printing head, and FIG. 1(a) is a partially cutaway plan view, and FIG. 1(b) is a side view thereof. A heating element 2 is formed on the front surface of the insulating base 1, and a heat sink 3 is provided on the back surface of the base 1. A plurality of electronic components 4 for controlling the current for generating heat in the heating element 2 are attached to the surface of the base 1 and covered with a protective cover 5.
ところで、一般に熱印字ヘッドにおいては、発熱体２の
温度が最適な印字温度に保たれるように、発熱体２の温
度を検知し、その検知出力に基づいて図示しない制御回
路によって発熱体２に印加する電圧のパルス幅等を制御
している。従来、この発熱体２の温度の検知のため番こ
、サーミスタ６などの温度感知素子を基体１の表面また
は放熱板３の裏面に設けている。サーミスタ６を基準１
の表面に設ける際には、電子部品４などによって位置が
制約されるため基体１の端部等に設けねばならない。し
たがって、サーミスタ６は基体１の表面に設ける場合で
も、放熱板３の裏面に設ける場合と同様に発熱体２から
離れた位置に設けられることになる。このためサーミス
タ６は、熱応答性が悪く、特に高速印字においては、発
熱体２の温度に追従できず、制御回路による発熱体２へ
の印加電圧の制御が困難となり、発熱体２を最適な印字
温度に保つことができず、高品位の印字を行うことに難
点があった。By the way, in general, in a thermal print head, the temperature of the heating element 2 is detected so that the temperature of the heating element 2 is maintained at the optimum printing temperature, and the temperature of the heating element 2 is controlled by a control circuit (not shown) based on the detection output. The pulse width of the applied voltage is controlled. Conventionally, in order to detect the temperature of the heating element 2, a temperature sensing element such as a counter or thermistor 6 is provided on the front surface of the base 1 or the back surface of the heat sink 3. Reference 1 to thermistor 6
When it is provided on the surface of the substrate 1, its position is restricted by the electronic components 4 and the like, so it must be provided at the end of the base 1 or the like. Therefore, even when the thermistor 6 is provided on the front surface of the base 1, it is provided at a position away from the heating element 2, as in the case where it is provided on the back surface of the heat sink 3. For this reason, the thermistor 6 has poor thermal responsiveness and cannot follow the temperature of the heating element 2, especially in high-speed printing, making it difficult for the control circuit to control the voltage applied to the heating element 2. It was difficult to maintain the printing temperature, making it difficult to perform high-quality printing.
本発明の目的は、上述の技術的課題を解決し、簡単な構
造で高速印字においても高品位の印字を可能とした熱印
字ヘッドを提供することである。An object of the present invention is to solve the above-mentioned technical problems and provide a thermal print head that has a simple structure and is capable of high-quality printing even at high speed printing.
以下、図面によって本発明の実施例【こついて詳細に説
明する。第２図は本発明の一実施例の一部を切欠いた平
面図であり、第３図はその側面である。絶縁性の基体７
の表面には、帯状に連続した発熱体８が形成σれており
、基体７の裏面には、金属製の放熱板９が設けられる。Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 2 is a partially cutaway plan view of an embodiment of the present invention, and FIG. 3 is a side view thereof. Insulating base 7
A continuous band-shaped heating element 8 is formed on the surface of the base 7, and a metal heat sink 9 is provided on the back surface of the base 7.
基体７の表面には、発熱体８に通電して発熱させるため
の複数の電子部品１０が取付けられる。これらの電子部
品１０は、保護カバー１１によって覆われる。A plurality of electronic components 10 are attached to the surface of the base 7 for energizing the heating element 8 to generate heat. These electronic components 10 are covered with a protective cover 11.
本発明に従う熱印字ヘッドでは、発熱体８に対応する基
体７の裏面に、発熱体８の温度を検知するための検知部
としてのサーミスタ１２が、スクリーン印刷によって形
成される。第４図は、基体７の裏面を示す図である。こ
の実施例では、サーミスタ１２は、基体７の長手方向（
第４図の左右方向）の中央付近に連続して形成される。In the thermal print head according to the present invention, a thermistor 12 as a detection section for detecting the temperature of the heating element 8 is formed on the back surface of the base 7 corresponding to the heating element 8 by screen printing. FIG. 4 is a diagram showing the back surface of the base body 7. FIG. In this embodiment, the thermistor 12 is arranged in the longitudinal direction of the base body 7 (
It is continuously formed near the center in the horizontal direction (in the left-right direction of FIG. 4).
発熱体８の温度は、このサーミスタ１２によって検知さ
れ、その検知出力が図示しない制御回路に与えられる。The temperature of the heating element 8 is detected by this thermistor 12, and its detection output is given to a control circuit (not shown).
この制御回路は、発熱体８の温度が最適な印字温度（こ
保たれるように発熱体８に印加する電圧のパルス幅等を
制御する。This control circuit controls the pulse width of the voltage applied to the heating element 8 so that the temperature of the heating element 8 is maintained at the optimum printing temperature.
基体７は非常に薄いので、発熱体８の温度は、発熱体８
に対応して基体７の裏面に形成されたサーミスタ１２に
よって速やかに検知されることになり、この検知出力に
基づいて制御回路によって発熱体８の温度が印字に最適
な温度に保たれることになる。このように本発明に従う
熱印字ヘッドでは、サーミスタ１２が発熱体８に近接し
た位置、すなわち薄い基体７の裏面に設けられるので、
熱応答性に優れ、高速印字においても、発熱体８の温度
が印字に最適な温度になるように制御することが可能と
なる。Since the base body 7 is very thin, the temperature of the heating element 8 is lower than that of the heating element 8.
The temperature of the heating element 8 is promptly detected by the thermistor 12 formed on the back surface of the base 7 in response to this, and the temperature of the heating element 8 is maintained at the optimum temperature for printing by the control circuit based on this detection output. Become. As described above, in the thermal print head according to the present invention, the thermistor 12 is provided at a position close to the heating element 8, that is, on the back surface of the thin base 7.
It has excellent thermal responsiveness, and even in high-speed printing, it is possible to control the temperature of the heating element 8 to the optimum temperature for printing.
またサーミスタ１２に、スクリーン印刷によって形成さ
れるので、取付はスペースを必要とせず、従来技術に比
べて熱印字ヘッドの構造が簡単となる。Furthermore, since it is formed on the thermistor 12 by screen printing, installation does not require space, and the structure of the thermal print head is simpler than in the prior art.
本発明の他の実施例として、発熱体８に印加する電圧の
制御を複数の区分毎に行なう場合には、第５図に示され
るよう番こ検知部としてのサーミスタ１２ａ〜１２ｄを
前記区分毎に対応させて複数形成してもよい。As another embodiment of the present invention, when controlling the voltage applied to the heating element 8 for each of a plurality of sections, thermistors 12a to 12d as a counter detection section are installed for each section as shown in FIG. A plurality of them may be formed in correspondence with the above.
以上のように本発明番こよれば、発熱体に対応する基体
の裏面には、発熱体の温度を検知するための検知部が印
刷形成されたので、発熱体に近接した位置に検知部が設
けられることになり、発熱体の温度を速やかに検知する
ことができ、これによって高速印字においても発熱体の
温度を印字に最適な温度に保つことができ、高品位の印
字が可能となる。さらに検知部は印刷形成されるので、
従来技術のように取付けのためのスペースを必要とせず
、構造が簡単となる。As described above, according to the present invention, the detection part for detecting the temperature of the heating element is printed on the back surface of the base corresponding to the heating element, so that the detection part is located close to the heating element. This allows the temperature of the heating element to be detected quickly, thereby making it possible to maintain the temperature of the heating element at the optimal temperature for printing even during high-speed printing, making it possible to perform high-quality printing. Furthermore, since the detection part is printed,
Unlike the conventional technology, no space is required for installation, and the structure is simple.
第１図は従来例を示す図、第２図は本発明の一実施例の
一部切欠平面図、第３図は第２図の側面図、第４図は基
体７の裏面を示す図、第５図は本発明の他の実施例の第
４図に対応した図である。
７・・・基体、８・・・発熱体、９・・・放熱板、１２
・・・サーミスタ。1 is a diagram showing a conventional example, FIG. 2 is a partially cutaway plan view of an embodiment of the present invention, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a diagram showing the back side of the base body 7. FIG. 5 is a diagram corresponding to FIG. 4 of another embodiment of the present invention. 7... Base, 8... Heating element, 9... Heat sink, 12
...Thermistor.
Claims (1)
面には発熱体を形成して成る熱印字ヘッドにおいて、 前記発熱体に対応する基体の裏面には、発熱体の温度を
検知するための検知部が印刷形成されたことを特徴とす
る熱印字ヘッド。(1) In a thermal print head in which a heat dissipation plate is provided on the back surface of an insulating base and a heating element is formed on the surface of the base, the back surface of the base corresponding to the heat generating element is provided with a heat dissipating plate for controlling the temperature of the heating element. A thermal print head characterized in that a detection part for detection is formed by printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10222183A JPS59229367A (en) | 1983-06-07 | 1983-06-07 | Thermal printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10222183A JPS59229367A (en) | 1983-06-07 | 1983-06-07 | Thermal printing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59229367A true JPS59229367A (en) | 1984-12-22 |
| JPH0454591B2 JPH0454591B2 (en) | 1992-08-31 |
Family
ID=14321607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10222183A Granted JPS59229367A (en) | 1983-06-07 | 1983-06-07 | Thermal printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59229367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6230062A (en) * | 1985-07-31 | 1987-02-09 | Seiko Epson Corp | Thermal printer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720354U (en) * | 1980-07-10 | 1982-02-02 | ||
| JPS57205173A (en) * | 1981-06-12 | 1982-12-16 | Hitachi Ltd | Temperature detector for heat sensitive head |
-
1983
- 1983-06-07 JP JP10222183A patent/JPS59229367A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720354U (en) * | 1980-07-10 | 1982-02-02 | ||
| JPS57205173A (en) * | 1981-06-12 | 1982-12-16 | Hitachi Ltd | Temperature detector for heat sensitive head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6230062A (en) * | 1985-07-31 | 1987-02-09 | Seiko Epson Corp | Thermal printer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0454591B2 (en) | 1992-08-31 |
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