JPH0725176B2 - Thermal print head - Google Patents
Thermal print headInfo
- Publication number
- JPH0725176B2 JPH0725176B2 JP3354179A JP35417991A JPH0725176B2 JP H0725176 B2 JPH0725176 B2 JP H0725176B2 JP 3354179 A JP3354179 A JP 3354179A JP 35417991 A JP35417991 A JP 35417991A JP H0725176 B2 JPH0725176 B2 JP H0725176B2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- printing
- print head
- element portion
- thermal print
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 57
- 238000007639 printing Methods 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 10
- 238000010304 firing Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はサーマルプリントヘッド
に関する。FIELD OF THE INVENTION This invention relates to thermal printheads.
【０００２】[0002]
【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。図６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。2. Description of the Related Art As is well known, a thermal print head of this type is manufactured by printing and firing a heating element for printing, which is heated by energization, on the surface of a substrate such as ceramics. FIG. 6 is a cross-sectional view of a conventional thermal print head, in which 1 is a substrate, 2 is a lead for energizing arranged on the surface of the substrate, and 3 is a heating element which generates heat when energized.
【０００３】この発熱体３は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するようにし
ている。通常は図２に示すように複数のリード２を並設
し、これらリード２をまたぐようにして発熱体３を形成
する。The heating element 3 is manufactured by screen-printing a resistance paste and firing it. Usually, a plurality of leads 2 are arranged side by side as shown in FIG. 2, and a heating element 3 is formed so as to straddle these leads 2.
【０００４】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
のため実際の感熱紙へのプリントにおいて、感熱紙に接
する頂面部分は発熱体の表面積よりも遥かに小さくな
る。By the way, since such a heating element 3 has a small area, its surface is inevitably formed in a rounded shape as shown in the figure at the time of printing. Therefore, in the actual printing on the thermal paper, the top surface portion in contact with the thermal paper is much smaller than the surface area of the heating element.
【０００５】これを具体的に説明すると、一般にこの種
発熱体３はその幅Ｌを０．２０〜０．２５ｍ程度に製作
するが、実際に感熱紙に接する範囲Ｍは発熱体３の中央
付近だけであって、その幅は発熱体３の幅の約半分程度
にすぎない。そしてこの範囲Ｍの両側にある部分にも電
流が流れて発熱するが、この部分での発熱はプリントに
直接関与しないので無駄な発熱となる。したがってそれ
だけ無駄な電力が消費されるようになるのである。To explain this in detail, generally, this kind of heating element 3 is manufactured so that its width L is about 0.20 to 0.25 m, but the range M actually contacting the thermal paper is near the center of the heating element 3. However, its width is only about half the width of the heating element 3. The current also flows into the portions on both sides of the range M to generate heat, but the heat generation in this portion is useless because it does not directly relate to printing. Therefore, useless power is consumed accordingly.
【０００６】これを解決するためには発熱体３の表面を
できるだけ広い範囲にわたって平坦にすればよく、その
ため従来では印刷された発熱体３の表面にローラをかけ
て平坦化したり、あるいはエッチングによって断面を角
型にしている。しかしこのような後加工を必要とするこ
とはそれだけ工程を煩雑にするし、また品質が不均一と
なるなどの幾多の欠点がある。In order to solve this problem, the surface of the heating element 3 should be flattened over as wide a range as possible. Therefore, conventionally, the surface of the printed heating element 3 is flattened by applying a roller, or is cross-sectioned by etching. Is square. However, the need for such post-processing complicates the process, and has a number of drawbacks such as uneven quality.
【０００７】[0007]
【発明が解決しようとする問題点】本発明は発熱体の表
面が平坦形状となるようにすることを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to make the surface of a heating element have a flat shape.
【０００８】[0008]
【問題点を解決するための手段】本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、断面がカ
マボコ状の第１の発熱体部と、前記第１の発熱体部の両
側にあって、表面が前記第１の発熱体部の頂面に連続す
る第２の発熱体部とによって構成することを特徴とす
る。According to the present invention, there is provided a heating element for printing, which is heated by energizing the surface of a substrate, including a first heating element portion having a semi-circular cross section and both sides of the first heating element portion. In addition, the surface is constituted by a second heating element portion whose surface is continuous with the top surface of the first heating element portion.
【０００９】[0009]
【作用】前記のように発熱体を、第１の発熱体部と第２
の発熱体部とによって構成すると、第１の発熱体部がカ
マボコ状であっても、その両側にある第２の発熱体部の
表面によって発熱体の表面は、第１の発熱体部の頂面よ
り平坦状となる。As described above, the heating element is connected to the first heating element and the second heating element.
If the first heating element portion is formed into a semi-cylindrical shape, the surfaces of the second heating element portions on both sides of the first heating element portion cause the surface of the heating element to be the top of the first heating element portion. It is flatter than the surface.
【００１０】[0010]
【実施例】本発明の実施例を図１によって説明する。図
２に示すように基板１の表面に複数のリード２を並設し
たのち、このリード２をまたぐようにして発熱体３を形
成することは従来構成と特に相違するものではない。本
発明にしたがい、第１の発熱体部３Ａを印刷形成する。
この場合断面がカマボコ状となることは前述したとおり
である。Embodiment An embodiment of the present invention will be described with reference to FIG. As shown in FIG. 2, forming a plurality of leads 2 in parallel on the surface of the substrate 1 and then forming the heating element 3 so as to straddle the leads 2 is not particularly different from the conventional configuration. According to the present invention, the first heating element portion 3A is formed by printing.
As described above, in this case, the cross section has a semi-cylindrical shape.
【００１１】そしてこの第１の発熱体部３Ａの両側に第
２の発熱体部３Ｂを連続して形成することにより、発熱
体３を構成する。この場合第２の発熱体部３Ａの表面
が、第１の発熱体部３Ａの頂面に連続するように形成す
る。The heating element 3 is constructed by continuously forming the second heating element portion 3B on both sides of the first heating element portion 3A. In this case, the surface of the second heating element portion 3A is formed so as to be continuous with the top surface of the first heating element portion 3A.
【００１２】このようにして発熱体３を形成すれば、発
熱体３Ａの両側に、その頂面に対して発熱体部３Ｂの表
面が連続するようになるため、発熱体３を図６に示す従
来例のように単独の発熱体部によって形成した発熱体に
比較すれば、その頂面は広い範囲にわたって平坦とな
る。したがってそれだけプリントに関与する範囲を広く
することができるし、逆に言えば発熱体３の両側に位置
する、プリントに関与しない部分の範囲が狭くなるの
で、この部分での電力消費が低減されることになる。When the heating element 3 is formed in this manner, the surface of the heating element portion 3B is continuous with the top surface of both sides of the heating element 3A, so that the heating element 3 is shown in FIG. Compared to the heating element formed by a single heating element portion as in the conventional example, its top surface is flat over a wide range. Therefore, the range involved in the printing can be widened, and conversely, the range of the parts located on both sides of the heating element 3 which are not related to the printing is narrowed, and the power consumption in this part is reduced. It will be.
【００１３】なお図１に示す発熱体３を製作するのに
は、次のようにするとよい。すなわち前述のように基板
１の表面に複数のリード２を並設したのち、このリード
をまたぐようにしてまず第１の発熱体３Ａを印刷形成す
る。そのためには図３に示すようにスクリーンマスク４
の開口部５から抵抗ベースト６を基板表面に移しながら
印刷すればよい。この印刷の後、スクリーンマスク４を
除去したあとの状態を示したのが図４である。このよう
にして第１の発熱体部３Ａが形成される。The heating element 3 shown in FIG. 1 may be manufactured as follows. That is, as described above, a plurality of leads 2 are arranged in parallel on the surface of the substrate 1, and then the first heating element 3A is formed by printing so as to straddle the leads. For that purpose, as shown in FIG.
Printing may be performed while transferring the resistance base 6 from the opening 5 to the substrate surface. FIG. 4 shows a state after removing the screen mask 4 after this printing. In this way, the first heating element portion 3A is formed.
【００１４】この第１の発熱体部３Ａを焼成する以前ま
たは焼成後に図５に示すように第２の発熱体３Ｂのため
の印刷を行う。そのためには別のスクリーンマスク７を
用意し、その開口部８の中に第１の発熱体部３Ａが嵌入
されるようにスクリーンマスク７を基板表面にあてがい
（図５参照。）、抵抗ペースト９をこの開口部７の中に
印刷する。この抵抗ペースト９によって図１に示すよう
な第２の発熱体部３Ｂが、第１の発熱体部３Ａの両側に
形成されことになる。Before or after firing the first heating element portion 3A, printing for the second heating element 3B is performed as shown in FIG. For that purpose, another screen mask 7 is prepared, the screen mask 7 is applied to the substrate surface so that the first heating element 3A is fitted into the opening 8 (see FIG. 5), and the resistance paste 9 is applied. Is printed in the opening 7. This resistance paste 9 forms the second heating element portion 3B as shown in FIG. 1 on both sides of the first heating element portion 3A.
【００１５】[0015]
【発明の効果】以上詳述したように本発明によれば、発
熱体のプリントに関与する範囲を大きくすることができ
るようになり、またプリントに関与しない範囲が従来例
よりも狭くなるので、無駄な電力の消費を低減させるこ
とができるようになるといった効果を奏する。As described above in detail, according to the present invention, it is possible to increase the range of the heating element that is involved in printing, and the range that is not involved in printing is narrower than that of the conventional example. It is possible to reduce wasteful power consumption.
【図１】本発明の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】ヘッドの平面図である。FIG. 2 is a plan view of a head.
【図３】本発明の実施例のヘッドの製作例を示す第１工
程を説明する断面図である。FIG. 3 is a cross-sectional view illustrating a first step showing an example of manufacturing a head according to an embodiment of the present invention.
【図４】同じく第２工程を示す断面図である。FIG. 4 is a sectional view similarly showing a second step.
【図５】同じく第３工程を示す断面図である。FIG. 5 is a sectional view similarly showing a third step.
【図６】従来例の断面図である。FIG. 6 is a sectional view of a conventional example.
１ 基板 ２ リード ３ 発熱体 ３Ａ 第１の発熱体部 ３Ｂ 第２の発熱体部 1 substrate 2 lead 3 heating element 3A first heating element section 3B second heating element section
Claims (1)
ト用の発熱体を設けてなるサーマルプリントヘッドにお
いて、前記発熱体を、断面がカマボコ状の第１の発熱体
部と、前記第１の発熱体部の両側にあって、表面が前記
第１の発熱体部の頂面に平坦状に連続する第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。A thermal print head comprising a heating element for printing, which heats when energized, provided on a surface of a substrate, wherein the heating element comprises a first heating element portion having a semi-circular cross section, and the first heating element. A thermal print head having a second heating element portion on both sides of the portion, the surface of which is flat and continuous with the top surface of the first heating element portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3354179A JPH0725176B2 (en) | 1991-11-18 | 1991-11-18 | Thermal print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3354179A JPH0725176B2 (en) | 1991-11-18 | 1991-11-18 | Thermal print head |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60033749A Division JPH0671793B2 (en) | 1985-02-21 | 1985-02-21 | Method for manufacturing thermal print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0538834A JPH0538834A (en) | 1993-02-19 |
| JPH0725176B2 true JPH0725176B2 (en) | 1995-03-22 |
Family
ID=18435823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3354179A Expired - Lifetime JPH0725176B2 (en) | 1991-11-18 | 1991-11-18 | Thermal print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0725176B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4132077B2 (en) * | 1996-02-13 | 2008-08-13 | ローム株式会社 | Thermal head and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5355039A (en) * | 1976-10-28 | 1978-05-19 | Nec Corp | Preparation of thermal head |
-
1991
- 1991-11-18 JP JP3354179A patent/JPH0725176B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0538834A (en) | 1993-02-19 |
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