JPS61192567A - Thermal printing head - Google Patents
Thermal printing headInfo
- Publication number
- JPS61192567A JPS61192567A JP3375085A JP3375085A JPS61192567A JP S61192567 A JPS61192567 A JP S61192567A JP 3375085 A JP3375085 A JP 3375085A JP 3375085 A JP3375085 A JP 3375085A JP S61192567 A JPS61192567 A JP S61192567A
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- heat generator
- heat
- resistance value
- temp
- 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
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】 （産業上の利用分野） この発明はサーマルプリントヘッドに関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a thermal print head.
（従来の技術）
周知のようにこの種サーマルプリントヘッドは、セラミ
ックのような基板の表面に、通電によって発熱するプリ
ント用の発熱体を印刷、焼成することによって製造され
る。第３図は従来のサーマルプリントヘッドの断面図を
示し、１は基板、２はその表面に並設された通電用のリ
ード、３は通電によって発熱する発熱体である。この発
熱体３はたとえば抵抗ペーストをスクリーン印刷し、そ
れを焼成することによって製造される。(Prior Art) As is well known, this type of thermal print head is manufactured by printing a heating element for printing, which generates heat when energized, on the surface of a substrate such as ceramic, and firing the printed heating element. FIG. 3 shows a sectional view of a conventional thermal print head, in which numeral 1 denotes a substrate, numeral 2 leads for energization arranged in parallel on the surface of the substrate, and numeral 3 a heating element that generates heat when energized. This heating element 3 is manufactured, for example, by screen printing a resistive paste and firing it.
ところでこのような発熱体３はその面積が小さいので、
その印刷の際にどうしてもその表面が図のように丸みを
おびたカマボコ型のように形成される。そのため実際に
この発熱体３に通電すると。By the way, since the area of such a heating element 3 is small,
When printing, the surface is inevitably formed into a rounded, semi-cylindrical shape, as shown in the figure. Therefore, when electricity is actually applied to this heating element 3.
中央部に向かうほど温度が高くなり、発熱体の表面温度
が均一にならない不便があった。There was an inconvenience that the temperature increased toward the center, and the surface temperature of the heating element was not uniform.
（発明が解決しようとする問題点）
この発明は発熱体の表面温度の均一化を図ることを目的
とする。(Problems to be Solved by the Invention) An object of the present invention is to equalize the surface temperature of a heating element.
（問題点を解・決するための手段）
この発明は基板の表面に、通電によって発熱するプリン
ト用の発熱体を設置してなるサーマルプリントヘッドに
おいて、前記発熱体を、一対の第１の発熱体部と、前記
第１の発熱体部間に設置されてあって、前記第１の発熱
体部よりも抵抗値が高く、かつ通電によって発熱する第
２の発熱体部とによって構成したことを特徴とする。(Means for Solving the Problems) The present invention provides a thermal print head in which a heating element for printing that generates heat when energized is installed on the surface of a substrate, in which the heating element is connected to a pair of first heating elements. and a second heating element part that is installed between the first heating element part, has a higher resistance than the first heating element part, and generates heat when energized. shall be.
（作用）
前記発熱体に通電してこれを発熱させたとき、第１の発
熱体部よりも、第２の発熱体部の抵抗値が高いので、第
２の発熱体部には電流が流れにくくなり、これによって
第２の発熱体部の温度上昇が抑制される。この温度上昇
の抑制によって発熱体としてその全体の表面温度分布が
均一化されるようになるのである。(Function) When the heating element is energized to generate heat, the resistance of the second heating element is higher than that of the first heating element, so current flows through the second heating element. This suppresses the temperature rise of the second heating element. By suppressing this temperature rise, the entire surface temperature distribution of the heating element becomes uniform.
（実施例）
この発明の実施例を図によって説明すると、第１図に示
すように基板１の表面に複数のり−ド２を並設したのち
、このリードをまたぐようにして発熱体３が設置される
。このような構成は従来の構成と相違するところはない
が、この発明にしたがいこの発熱体３を、一対の第１の
発熱体部３Ａと、この両第１の発熱体部３Ａの間に設置
される第２の発熱体部３Ｂとによって構成する。そして
発熱体部３Ｂとしてその抵抗値を、発熱体部３Ａのそれ
よりも高くしておく。(Embodiment) An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. be done. Although such a configuration is not different from the conventional configuration, according to the present invention, this heating element 3 is installed between a pair of first heating element parts 3A and both first heating element parts 3A. and a second heating element section 3B. The resistance value of the heating element part 3B is set higher than that of the heating element part 3A.
そのためには発熱体をスクリーン印刷によって厚膜に形
成する場合、第２の発熱体部３Ｂを形成する抵抗ペース
トとして、第１の発熱体部３Ａを形成するための抵抗ペ
ーストよりも抵抗値の高いものを使用して製作すればよ
い。For this purpose, if the heating element is formed into a thick film by screen printing, the resistance paste for forming the second heating element part 3B must have a higher resistance value than the resistance paste for forming the first heating element part 3A. You can make it using things.
以上の構成において、リード２を介して発熱体３に通電
すると、各発熱体部３Ａ、３Ｂは発熱するが、発熱体部
３Ｂはその抵抗値が発熱体部３Ａのそれよりも高いので
電流が流れにくくなり、これによってこの部分での温度
は発熱体部３Ａに比較すれば、あまり上昇しないように
なる。In the above configuration, when electricity is applied to the heating element 3 via the lead 2, each heating element part 3A, 3B generates heat, but the resistance value of the heating element part 3B is higher than that of the heating element part 3A, so the current does not flow. It becomes difficult to flow, and as a result, the temperature in this part does not rise much compared to the heating element part 3A.
発熱体３全体が同じ抵抗値のものであるときは、その中
央部の温度が最も高くなることは前述したとおりである
。しかし前記のように中央の発熱体部３Ｂの発熱温度が
抑制されるようになれば、発熱体３としてその表面の温
度が均一化されるようになる。As described above, when the entire heating element 3 has the same resistance value, the temperature at the center thereof is the highest. However, if the heat generation temperature of the central heating element portion 3B is suppressed as described above, the temperature of the surface of the heating element 3 will be made uniform.
なおこのように２種の発熱体部をもって発熱体３を構成
するには、たとえば次のようにして製作するとよい、す
なわち最初に発熱体部３Ａを厚膜によって形成する。こ
れは抵抗ペーストをスクリーン印刷することによって形
成できる。この発熱体部３Ａを印刷形成したあと、これ
を焼成する以前または焼成後に第２の発熱体部３Ｂを、
前記両第１の発熱体部３Ａの間に形成する。これも抵抗
ペーストを発熱体部３Ａ間に埋めるようにスクリーン印
刷し、このあと焼成することによって形成する。このよ
うにして発熱体を形成すると、その表面を広い範囲にわ
たって平坦とすることができて都合がよい。In order to configure the heating element 3 with two types of heating element parts as described above, it is preferable to manufacture the heating element 3 as follows, for example: first, the heating element part 3A is formed of a thick film. This can be formed by screen printing resistive paste. After printing and forming this heating element part 3A, before or after firing it, a second heating element part 3B is formed.
It is formed between both the first heating element parts 3A. This is also formed by screen printing the resistance paste so as to fill it between the heating element parts 3A, and then baking it. Forming the heating element in this manner is convenient because its surface can be made flat over a wide range.
（発明の効果）
以上詳述したようにこの発明によれば、プリント用の発
熱体として中央部の発熱体部をその両側の発熱体部より
も抵抗値を高くして構成したので、この発熱体の表面温
度は、これが均一の抵抗値をもって構成された発熱体の
表面温度に比較して、可及的に均一にすることができる
といった効果を奏する。(Effects of the Invention) As detailed above, according to the present invention, the central heating element is configured to have a higher resistance value than the heating elements on both sides as a heating element for printing. The surface temperature of the body can be made as uniform as possible compared to the surface temperature of a heating element configured to have a uniform resistance value.
第１図はこの発明の実施例を示す断面図、第２図はヘッ
ドの平面図、第３図は従来例の断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a plan view of the head, and FIG. 3 is a sectional view of a conventional example.
Claims (1)
体を設置してなるサーマルプリントヘッドにおいて、前
記発熱体を、一対の第１の発熱体部と、前記第１の発熱
体部間に設置されてあって、前記第１の発熱体部よりも
抵抗値が高く、かつ通電によって発熱する第２の発熱体
部とによって構成してなるサーマルプリントヘッド。In a thermal print head in which a heating element for printing that generates heat when energized is installed on the surface of a substrate, the heating element is installed between a pair of first heating element parts and the first heating element part. and a second heating element that has a higher resistance than the first heating element and generates heat when energized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3375085A JPS61192567A (en) | 1985-02-21 | 1985-02-21 | Thermal printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3375085A JPS61192567A (en) | 1985-02-21 | 1985-02-21 | Thermal printing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61192567A true JPS61192567A (en) | 1986-08-27 |
Family
ID=12395096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3375085A Pending JPS61192567A (en) | 1985-02-21 | 1985-02-21 | Thermal printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61192567A (en) |
-
1985
- 1985-02-21 JP JP3375085A patent/JPS61192567A/en active Pending
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