JPS58162358A - Thermal head - Google Patents

Thermal head

Info

Publication number
JPS58162358A
JPS58162358A JP4508282A JP4508282A JPS58162358A JP S58162358 A JPS58162358 A JP S58162358A JP 4508282 A JP4508282 A JP 4508282A JP 4508282 A JP4508282 A JP 4508282A JP S58162358 A JPS58162358 A JP S58162358A
Authority
JP
Japan
Prior art keywords
heat
heat radiating
heat sink
radiating plate
temperature
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
Application number
JP4508282A
Other languages
Japanese (ja)
Inventor
Toshiaki Shoji
俊明 庄司
Takafumi Endo
孝文 遠藤
Hiroshi Sasaki
宏 佐々木
Toshio Hida
飛田　敏男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4508282A priority Critical patent/JPS58162358A/en
Publication of JPS58162358A publication Critical patent/JPS58162358A/en
Pending legal-status Critical Current

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
    • B41J2/35—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 providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To obtain uniform printing density, in a facsimile and the like, by providing heat exchanging elements, which are cooled and heated in response to the directions of a current, between a first heat radiating plate on the upper surface of which a heating substrate is mounted, and a second heat radiating plate at the lower side. CONSTITUTION:A plurality of the heat exchanging element 6 are provided between both heat radiating plates 21 and 22 through insulating ceramic substrates 6a and 6b in the thermal head. The heating substrate 1, on the surface of which heating elements are formed, is mounted on the heat radiating plate 21. When a power source switch 7a is turned to the left side and a current is flowed from the upper part of the heat exchanging elements 6, the first heat radiating plate 21 is cooled and the second heat radiating plate 22 is heated. Conversely. When the power source switch 7a is turned to the right, both heat radiating plates 21 and 22 are conversely heated and cooled. Therefore, the temperature of the heat radiating plate 21, i.e. the heating substrate 1, can be quickly controlled to the desired temperature, and the uniform printing density can be obtained all the time.

Description

【発明の詳細な説明】 この発明はファクシミリ等の印字に用いられるサーマル
ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal head used for printing in facsimiles and the like.

従来、この釉の装置として第１図に示すものがあった。Conventionally, there has been a device for making this glaze as shown in FIG.

図において％（１）はその表面に発熱素五図示せず）が
形成された発熱基板、シＪはその上面にこの発熱基板（
１）が搭載された第１の放熱板％（２）はこの第１の放
熱板３υの下面側に設けら、れたｊ８２の放熱板であり
・両数熱板＠ツはベースともヒートシンクとも呼ばれて
いる。また（３）は上記両数熱板Ｑυ＠間に設けられた
加熱素子であり、ここではポジスタが用いられている。In the figure, %(1) is a heat-generating substrate with a heat-generating element (not shown) formed on its surface, and
The first heat sink on which 1) is mounted % (2) is a J82 heat sink installed on the bottom side of this first heat sink 3υ. Both heat plates are both base and heat sink. being called. Further, (3) is a heating element provided between the two heating plates Qυ@, and a POSISTOR is used here.

また（５）は電源％のりはスイッチ、１４）はリード線
である。Further, (5) is a switch for the power supply, and 14) is a lead wire.

サーマルヘッドを用いて印字９作画しようとする場合、
ヘッドが発熱しすぎると印字かにじみ。When trying to print 9 using a thermal head,
If the head generates too much heat, the print will smudge.

逆に温度が低いと印字かうすいものとなり、そのため一
様な印字濃度を得るためには１周囲温度の変化あるいは
発熱素子の温度変化に関係なく、サーマルヘッドのベー
ス温度を一定ｌζ保つことが必要である。そこで本装置
はこの温度コントロールのためイこ大型の放熱板＠（支
）と両者間に配設されたポジスタ等の発熱素子（３ンと
を備えている。しかしながら本装置で温度コントロール
かできるのは温度を上昇させる方向のみであるため、温
度が上昇しすぎた場合には、配録を停止して放熱板＠（
２）がその自然放熱ｌこより温度低下するのを待つ必要
があり、温度制御を迅速安定ｔこ行なうことができなか
った。On the other hand, if the temperature is low, the print will be faint, so in order to obtain uniform print density, it is necessary to maintain the base temperature of the thermal head constant regardless of changes in the ambient temperature or the temperature of the heating element. It is. Therefore, in order to control this temperature, this device is equipped with a large heat sink (support) and a heating element (3) such as a POSISTOR placed between the two.However, this device can only control the temperature. is only in the direction of increasing the temperature, so if the temperature rises too much, stop recording and replace the heat sink @ (
2) It was necessary to wait for the temperature to drop from its natural heat dissipation, making it impossible to quickly and stably control the temperature.

この発明は上記のような従来のものの欠点を除去するた
めになされたもので、ｊｌ！ｌおよび第２の放熱板間に
熱交換素子を設け、必要に応じて第１の放熱板を冷却も
しくは加熱できるようにすることにより、温度制御を容
易かつ迅速に行なうことができ、常に一様な印字濃度を
得ることができるサーマルヘッドを提供することを目的
としている。This invention was made in order to eliminate the drawbacks of the conventional ones as mentioned above. By providing a heat exchange element between the first heat sink and the second heat sink so that the first heat sink can be cooled or heated as necessary, temperature control can be performed easily and quickly, and the temperature can always be uniformly controlled. The purpose of the present invention is to provide a thermal head that can obtain a high printing density.

以下、この発明の一実施例を図について説明する。An embodiment of the present invention will be described below with reference to the drawings.

第２図は本発明の一実施例によるサーマルヘッドを示し
、図に詔いてｉＪ１図と同一符号は同−又は相当部分を
示す。（６）は両数熱板＠■間に介設され、電流の印加
方向に応じて放熱板（社）を加熱もしくは冷却する熱交
換素子であり、これは上記両数熱板（社）（２）とはそ
の両面に取り付けられたセラミック基板（６すωｂ）に
より絶縁されている。また（７）は双方向電源であり、
これはリード線（４）及び両数熱板＋２１３■の側端に
設けられた端子（９１）（９ｂ）を介して熱交換素子（
６）に接続され、スイッチσａ）の操作により該熱交換
素子（６）に一方向又はその逆方向に電流を流すことが
できるものである０ 本サーマルヘッドにおいては、電源スィッチ７すを図示
左側に倒すと熱交換素子（６）にその上方から下方に電
流が流れて第１の放熱板（社）が冷却され、＄２の放熱
板＠が加熱される。逆に、電源スィッチ（７りを図示右
側に倒すと熱交換素子（６）にその下方から上方に電流
が流れて第１の放熱板圓が加熱され、第２の放熱板（２
）が冷却される。また勿論双方向電源（７）のスイッチ
ｃ１ａ）を図示東線のオフ位置にしておけば熱交換素子
（６）にはいずれの方向にも電流が流れず、放熱板（社
）は加熱も冷却もされない。FIG. 2 shows a thermal head according to an embodiment of the present invention, and in the figure, the same reference numerals as in FIG. iJ1 indicate the same or corresponding parts. (6) is a heat exchange element that is interposed between the two heat plates @■ and heats or cools the heat sink depending on the direction of current application. 2) is insulated by ceramic substrates (6sωb) attached to both sides. Also, (7) is a bidirectional power supply,
This is connected to the heat exchange element (
6), and can flow current through the heat exchange element (6) in one direction or the opposite direction by operating the switch σa). When it is tilted down, a current flows through the heat exchange element (6) from above to below, cooling the first heat sink and heating the $2 heat sink. Conversely, when the power switch (7) is turned to the right side in the figure, current flows through the heat exchange element (6) from below to above, heating the first heat sink circle and heating the second heat sink (2).
) is cooled. Of course, if the switch c1a) of the bidirectional power supply (7) is set to the off position shown in the east line, no current will flow in either direction to the heat exchange element (6), and the heat sink will neither heat nor cool. Not even done.

従って、放熱板（社）の温度が高い時は双方向電源（７
）のスイッチσりを図示左側に、温度が低い時は図示右
側に投入し、温度が所望の温度であるときはこれをオフ
とすることにより、放熱板（２）を容易に上記所望温度
に制御でき、その結果常に一定の印字濃度を得ることが
できる。Therefore, when the temperature of the heat sink is high, the bidirectional power supply
) is on the left side in the figure, when the temperature is low, it is on the right side in the figure, and by turning it off when the temperature is the desired temperature, the heat sink (2) can be easily brought to the above desired temperature. As a result, a constant print density can be obtained at all times.

以上のようにこの発明によれば、加熱素子の代わりに熱
交換素子を設け、必要に応じて第１の放熱板を冷却もし
くは加熱するようにしたので、該放熱板の温度を容易迅
速に一定に制御でき、常に一様な印字濃度が得られる効
果がある。As described above, according to the present invention, a heat exchange element is provided in place of a heating element, and the first heat sink is cooled or heated as necessary, so that the temperature of the first heat sink can be easily and quickly kept constant. This has the effect of providing uniform print density at all times.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のサーマルヘッドの側面図、第２図は本発
明の一実施例によるサーマルヘッドの側面図であるＯ ｉｌ＋・・・発熱基板、（財）・・・＄１の放熱板、（
社）・・・第２の放熱板、（６）・・・熱交換素子、（
７）・・・双方向電源。 なお図小同−符号は同−又は相当部分を示す。 代理人　　葛　　野゛　信　　− 第１図Fig. 1 is a side view of a conventional thermal head, and Fig. 2 is a side view of a thermal head according to an embodiment of the present invention. (
company)...Second heat sink, (6)...Heat exchange element, (
7)...Bidirectional power supply. Note that the same numbers in the figures indicate the same or equivalent parts. Agent Shin Kuzuno - Figure 1

Claims (1)

【特許請求の範囲】[Claims] （１）　　その表面に発熱素子が形成された発熱基板と
、その上面にこの発熱基板を搭載している第１の放熱板
と、この第１の放熱板の下面１１Ｊに設けられた第２の
放熱板と、上記両放熱板間ｌζ設けられ′ｆ！１流の流
れる方向に応じて上記１！１の放熱板を冷却才たは加熱
すゑ熱交換素子と、この熱交換素子に一方向又はその逆
方向に電流を流す双方向電源とを備えたことを特徴とす
るサーマルヘッド。(1) A heat generating board with a heat generating element formed on its surface, a first heat sink having the heat generating board mounted on its upper surface, and a second heat sink provided on the lower surface 11J of this first heat sink. A heat sink and a distance lζ between the two heat sinks are provided'f! It is equipped with a heat exchange element that cools or heats the heat sink of 1!1 above according to the flow direction of the first current, and a bidirectional power source that causes current to flow in one direction or the opposite direction to this heat exchange element. A thermal head featuring
JP4508282A 1982-03-19 1982-03-19 Thermal head Pending JPS58162358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4508282A JPS58162358A (en) 1982-03-19 1982-03-19 Thermal head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4508282A JPS58162358A (en) 1982-03-19 1982-03-19 Thermal head

Publications (1)

Publication Number Publication Date
JPS58162358A true JPS58162358A (en) 1983-09-27

Family

ID=12709401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4508282A Pending JPS58162358A (en) 1982-03-19 1982-03-19 Thermal head

Country Status (1)

Country Link
JP (1) JPS58162358A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55130787A (en) * 1979-03-30 1980-10-09 Fuji Xerox Co Ltd Thermal head that can read optical picture
JPS5727344B2 (en) * 1973-12-31 1982-06-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727344B2 (en) * 1973-12-31 1982-06-10
JPS55130787A (en) * 1979-03-30 1980-10-09 Fuji Xerox Co Ltd Thermal head that can read optical picture

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