JPH0761715B2 - Edge type thermal head - Google Patents
Edge type thermal headInfo
- Publication number
- JPH0761715B2 JPH0761715B2 JP62072198A JP7219887A JPH0761715B2 JP H0761715 B2 JPH0761715 B2 JP H0761715B2 JP 62072198 A JP62072198 A JP 62072198A JP 7219887 A JP7219887 A JP 7219887A JP H0761715 B2 JPH0761715 B2 JP H0761715B2
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- printing
- head
- thermal
- ink ribbon
- 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
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
- B41J2/335—Structure of thermal heads
Landscapes
- Electronic Switches (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、感熱用プリンタ用、特に凹凸の大きな粗い紙
にも良好な印字を可能とした端部型サーマルヘッドに関
する。DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to an end-type thermal head for a heat-sensitive printer, in particular, capable of excellent printing even on rough paper having large irregularities.
〈従来の技術〉 従来のサーマルヘッドにあっては、プラテンに支持され
た印刷用紙に対して、感熱転写インクリボンを介して、
平板状のサーマルヘッドをその本体の主面が紙面に対向
するようにしてサーマルヘッドの発熱部を紙面に摺接さ
せる。そして、サーマルヘッドを一方向に送り、サーマ
ルヘッドの発熱部を所定のパターンにて選択的に発熱さ
せ、リボンから感熱転写インクを印刷用紙に転写して所
望の印字を行うようにしていた。<Prior Art> In the conventional thermal head, the printing paper supported by the platen is transferred to the printing paper via the thermal transfer ink ribbon.
The heat generating part of the thermal head is brought into sliding contact with the paper surface so that the main surface of the flat-plate thermal head faces the paper surface. Then, the thermal head is fed in one direction to selectively generate heat in a heat generating portion of the thermal head in a predetermined pattern, and the heat-sensitive transfer ink is transferred from the ribbon onto the printing paper to perform desired printing.
しかるに、凹凸の大きな粗い印刷用紙を用いた場合に
は、感熱転写インクリボンと印刷用紙との間の密着性が
悪くなる。また、発熱体からヘッド本体に熱が逃げ易い
ため、印字時に充分に発熱体が昇温せずインクが印刷用
紙に転写されない部分が多くなる不都合があった。However, when a rough printing paper with large irregularities is used, the adhesion between the thermal transfer ink ribbon and the printing paper becomes poor. Further, since heat easily escapes from the heating element to the head main body, there is a disadvantage that the heating element does not heat up sufficiently during printing and ink is not transferred to the printing paper in many portions.
例えば、特開昭60−21263号公報には本体の主面に代え
て幅ｔ′（1mm≦ｔ′≦2.5mm）の平坦な端面にグレーズ
層を、その表面が曲面となるように形成し、このグレー
ズ層の表面に発熱体を列状に形成し、発熱体の接触面積
を小さくすることにより、感熱転写インクリボンと印刷
用紙との密着性を改善したものが開示されている。しか
しながら、ヘッドの搬送等に問題を生じ、リボントラブ
ルが起き易い。また、平坦な端面に発熱体を設けるに
は、熱応答性に大きな影響を及ぼすグレーズ層の最適厚
さの設定が、材料の物性に左右されるために困難である
等、製造上の問題もある。For example, in JP-A-60-21263, a glaze layer is formed on a flat end surface having a width t '(1 mm≤t'≤2.5 mm) instead of the main surface of the main body so that the surface becomes a curved surface. It is disclosed that the heating elements are formed in rows on the surface of the glaze layer and the contact area of the heating elements is reduced to improve the adhesion between the thermal transfer ink ribbon and the printing paper. However, problems such as head transport may occur, and ribbon troubles are likely to occur. In addition, in order to provide a heating element on a flat end face, it is difficult to set the optimum thickness of the glaze layer, which has a great influence on the thermal response, because it depends on the physical properties of the material. is there.
特開昭59−171672号公報には、ヘッド本体の主面と端面
との間に形成された傾斜面に発熱体を設けたものが開示
されている。このようなヘッドによれば、印刷用紙に対
してヘッド本体を傾斜させて当てるようにすることがで
きるため、搬送上の問題は改善し得るが、グレーズ層を
形成する上での問題点は解決できない。Japanese Unexamined Patent Publication No. 59-171672 discloses a head body provided with a heating element on an inclined surface formed between the main surface and the end surface. With such a head, the head main body can be tilted and applied to the printing paper, so that the problem in transport can be improved, but the problem in forming the glaze layer can be solved. Can not.
他方、感熱転写インクリボンを用いて鮮鋭な印字を得る
には、インクリボンを感熱した後、インクが冷却する前
に印刷用紙の印字面からインクリボンを迅速に引き剥が
すことが有効である。従って、熱転写後のインクリボン
と印字面との挟み角（引き剥がし角度）が大きければ大
きいほど印字品質を高める上に好ましいと言える。しか
しながら上記従来形式のヘッドによると、インクリボン
の引き剥がし角度を十分に大きくとることは、ヘッド本
体の端面に干渉するために困難である。On the other hand, in order to obtain a sharp print using the heat-sensitive transfer ink ribbon, it is effective to quickly peel off the ink ribbon from the printing surface of the printing paper after the ink ribbon is heat-sensitive and before the ink is cooled. Therefore, it can be said that the larger the sandwiching angle (peeling angle) between the ink ribbon and the printing surface after thermal transfer is, the more preferable it is to improve the printing quality. However, according to the conventional head described above, it is difficult to make the peeling angle of the ink ribbon sufficiently large because it interferes with the end surface of the head body.
〈発明が解決しようとする問題点〉 本発明は、このような従来技術の欠点を改善するべく案
出されたものであり、その主な目的は、ヘッド搬送上の
問題が無いことはもとより、表面の粗い紙にも良好な印
字が可能となるように改良された端部型サーマルヘッド
を提供することにある。<Problems to be Solved by the Invention> The present invention has been devised to improve such drawbacks of the prior art, and its main purpose is that there is no problem in head transport. An object of the present invention is to provide an end-type thermal head improved so that good printing can be performed even on paper having a rough surface.
〈問題点を解決するための手段〉 このような目的は、本発明によれば、基板の主面と端面
とのなす角度が鋭角をなすと共に、前記主面と前記端面
との間が、曲率半径Ｒ（0.1mm≦Ｒ≦0.5mm）の円滑な凸
面にて接続され、該凸面に電気絶縁性材料からなるグレ
ーズ層と複数の発熱体とが設けられることを特徴とする
端部型サーマルヘッドを提供することにより達成され
る。<Means for Solving Problems> According to the present invention, such an object is to form an acute angle between the main surface and the end surface of the substrate, and to provide a curvature between the main surface and the end surface. An end-type thermal head characterized in that they are connected by a smooth convex surface having a radius R (0.1 mm ≦ R ≦ 0.5 mm), and a glaze layer made of an electrically insulating material and a plurality of heating elements are provided on the convex surface. Is achieved by providing.
〈作用〉 このように基板の主面と端面とのなす角度を鋭角とする
ことにより、主面と端面との接続部分に設けられた発熱
体を印刷用紙に接触させた時の印字面と端面との間の挟
み角を大きくすることができる。また、基板の主面と端
面との接続部分に稜線並びに平坦面が無くなり、発熱部
を形成するべき部分が円滑かつ微小な曲率半径の曲面で
構成されるため、発熱部のインクリボンとの接触面積を
低減して面圧を増大でき、かつ熱応答性に影響を及ぼす
グレース層の最適厚さの設定が容易となる。しかしてヘ
ッドの端面との干渉を避けて印字面に遂するリボンの引
き剥がし角度を増大することができると同時に、面厚の
増大の熱応答性の向上とにより、印字品質のより一層の
向上と印字速度のより一層の高速化とを両立し得る。<Operation> By thus forming an acute angle between the main surface and the end surface of the substrate, the printing surface and the end surface when the heating element provided at the connecting portion between the main surface and the end surface is brought into contact with the printing paper The included angle between and can be increased. Further, since the ridge line and the flat surface are eliminated at the connecting portion between the main surface and the end surface of the substrate, and the portion where the heat generating portion is to be formed is a smooth curved surface with a small radius of curvature, contact with the ink ribbon of the heat generating portion The area can be reduced to increase the surface pressure, and the optimum thickness of the grace layer that affects the thermal response can be easily set. Therefore, it is possible to increase the ribbon peeling angle on the printing surface while avoiding the interference with the end surface of the head, and at the same time, further improve the printing quality by improving the thermal response of the increase in the surface thickness. It is possible to achieve both higher printing speed and higher printing speed.
〈実施例〉 第１図は、本発明に基づくサーマルヘッドの１実施例を
適用した感熱プリンタ機構を示す。<Embodiment> FIG. 1 shows a thermal printer mechanism to which an embodiment of a thermal head according to the present invention is applied.
プラテン１に支持された印刷用紙２に対して、感熱転写
インクリボン３を介して、概ね平板状のサーマルヘッド
４を、その本体4aを傾斜させた状態で、後記する発熱部
を摺接させる。そして同時にサーマルヘッド４を一方向
に送り、発熱部を所定のパターンにて選択的に発熱さ
せ、インクリボン３から感熱転写インクを印刷用紙２に
転写して所要の印字を行うようにしている。With respect to the printing paper 2 supported by the platen 1, a thermal head 4 having a substantially flat plate shape is slidably contacted with a heat generating portion to be described later with the main body 4a thereof being inclined with the thermal transfer ink ribbon 3 interposed therebetween. At the same time, the thermal head 4 is fed in one direction to selectively generate heat in a heating pattern in a predetermined pattern, and the heat-sensitive transfer ink is transferred from the ink ribbon 3 to the printing paper 2 to perform desired printing.
第２図は、サーマルヘッド４の詳細な構造を示す。例え
ばアルミナ等のセラミック材料からなる基板７は、主面
８の延長面と端面９の延長面とのなす角αが鋭角をなし
ており、この主面８と端面９との間を円滑に接続する凸
Ｒ面10が形成されている。凸Ｒ面10は曲率半径Ｒ（0.1m
m≦Ｒ≦0.5mm）の凸面からなる。また、凸Ｒ面10の幅
（弦寸法）ｔ′は0.1mm≦ｔ′≦0.5mmとなっており、例
えば0.2mmであって、その表面に20〜60μｍの肉厚にな
るようにガラスグレーズ層11が設けられている。ガラス
グレーズ層11の表面の発熱部をなすべき部分には、SiO2
等からなるアンダーコート膜12がイオンプレーティング
により形成されている。アンダーコート膜12の表面には
スパッタリングによりTa2Nからなる発熱抵抗体13が約50
0Åの厚さで形成されている。発熱抵抗体13の端部には
主面８側及び端面９側へ向けて延出するCr−Au等からな
る電極膜14、15が、蒸着等を行った後フォトエッチング
を行うことによりに所定のパターンにて形成されてい
る。更に電極膜14、15の表面には、耐摩耗性及び酸化防
止のためのSiO2及びTa2O5の２層からなる保護膜16がイ
オンプレーティングにより形成されている。ここで、電
極膜14、15を形成する際に、第１図の矢印に示された方
向即ちグレーズ層11の表面に垂直な方向に対して傾斜し
た方向より蒸着等が行われる。そのため、電極膜14、15
の肉厚が、発熱抵抗体13の端部から中心部分に向けて漸
減している。従ってサーマルヘッド４の発熱部にて電極
膜14、15と発熱抵抗体13との境界部分に段差が生じるこ
とがない。FIG. 2 shows a detailed structure of the thermal head 4. For example, the substrate 7 made of a ceramic material such as alumina has an acute angle α between the extension surface of the main surface 8 and the extension surface of the end surface 9, and the main surface 8 and the end surface 9 are smoothly connected. A convex R surface 10 is formed. The convex R surface 10 has a radius of curvature R (0.1 m
m ≦ R ≦ 0.5 mm). The width (chord size) t'of the convex R surface 10 is 0.1 mm ≤ t '≤ 0.5 mm, for example 0.2 mm, and the surface of the glass glaze has a thickness of 20 to 60 µm. A layer 11 is provided. The portion of the surface of the glass glaze layer 11 that should be the heat generating portion, SiO 2
An undercoat film 12 made of, for example, is formed by ion plating. A heating resistor 13 made of Ta 2 N is formed on the surface of the undercoat film 12 by sputtering.
It is formed with a thickness of 0Å. Electrode films 14 and 15 made of Cr-Au or the like extending toward the main surface 8 side and the end surface 9 side are provided at the ends of the heating resistor 13 by photoetching after vapor deposition or the like. It is formed in the pattern. Further, a protective film 16 composed of two layers of SiO 2 and Ta 2 O 5 is formed on the surfaces of the electrode films 14 and 15 by ion plating for abrasion resistance and oxidation prevention. Here, when the electrode films 14 and 15 are formed, vapor deposition or the like is performed from the direction shown by the arrow in FIG. 1, that is, the direction inclined with respect to the direction perpendicular to the surface of the glaze layer 11. Therefore, the electrode films 14 and 15
Is gradually reduced in thickness from the end portion of the heating resistor 13 toward the central portion. Therefore, no step is formed at the boundary between the electrode films 14 and 15 and the heating resistor 13 in the heating portion of the thermal head 4.
このサーマルヘッド４は、発熱部が本体4aの前記した凸
Ｒ面10に設けられているため、接触面積が小さくなって
面圧が高くなり、感熱転写インクリボン３と印刷用紙２
との密着が良くなる。しかも本体4aの主面８と端面９と
の接続部分の凸Ｒ面10に設けられた発熱部を感熱転写イ
ンクリボン３に接触させた時の印刷用紙２の印字面と端
面９との間の挟み角が大きくなるので、端面９との干渉
を避けて印字面に対する感熱転写インクリボン３の引き
剥がし角度（第１図のβ）を増大することができるの
で、感熱転写インクリボン３を加熱した後、インクが冷
却する前に印刷用紙２の印字面から感熱転写インクリボ
ン３を迅速に引き剥がすことができる。これに加えて、
ヘッド搬送も良好となっている。In the thermal head 4, the heat generating portion is provided on the convex R surface 10 of the main body 4a, so that the contact area becomes small and the surface pressure becomes high, so that the thermal transfer ink ribbon 3 and the printing paper 2
Improves adhesion with. Moreover, when the heat generating portion provided on the convex R surface 10 of the connecting portion between the main surface 8 and the end surface 9 of the main body 4a is brought into contact with the heat-sensitive transfer ink ribbon 3, the printing surface of the printing paper 2 and the end surface 9 are Since the gripping angle becomes large, the peeling angle (β in FIG. 1) of the heat-sensitive transfer ink ribbon 3 with respect to the printing surface can be increased by avoiding the interference with the end face 9, so that the heat-sensitive transfer ink ribbon 3 was heated. After that, the thermal transfer ink ribbon 3 can be quickly peeled off from the printing surface of the printing paper 2 before the ink is cooled. In addition to this,
The head transport is also good.
このように、本発明によれば、基板の主面８と端面９と
の接続部分に稜線や平坦面が無くなり、発熱部を形成す
るべき部分が円滑な曲面で構成されるため、熱応答性に
影響を及ぼすグレーズ層11の最適厚さの設定が容易とな
る。と同時に、主面８と端面９とのなす角度αが鋭角を
なしているため、発熱部が設けられる部分の体積が小さ
くなっていることから、ヘッドの熱応答性が改善され
る。従って、例えば基板をセラミック材料に代えて比較
的加工性の良い金属からなるものとすることが可能とな
る。また、グレーズ層11をスパッタリング或いは真空蒸
着等の真空薄膜形成過程により成膜すれば、ヘッドの形
状に拘らず均一かつ膜厚の小さいグレーズ相当層を形成
することができる。As described above, according to the present invention, the ridge line and the flat surface are eliminated at the connecting portion between the main surface 8 and the end surface 9 of the substrate, and the portion where the heat generating portion is to be formed is a smooth curved surface. It becomes easy to set the optimum thickness of the glaze layer 11 that affects the. At the same time, since the angle α formed by the main surface 8 and the end surface 9 is an acute angle, the volume of the portion where the heat generating portion is provided is small, so the thermal response of the head is improved. Therefore, for example, the substrate can be made of a metal having relatively good workability instead of the ceramic material. Further, by forming the glaze layer 11 by a vacuum thin film forming process such as sputtering or vacuum deposition, it is possible to form a glaze equivalent layer having a uniform and small thickness regardless of the shape of the head.
〈発明の効果〉 このように本発明によれば、サーマルヘッドの発熱部分
に於ける熱特性が改善されることにより、基板に例えば
加工性の良い金属等を用いることが可能となり、また印
字面に対するリボンの引き剥がし角度を増大することが
できるので、リボン或いは用紙との密着性が改善される
ことと相俟って印字品質が向上するため、その効果は極
めて大である。<Effects of the Invention> As described above, according to the present invention, by improving the thermal characteristics in the heat generating portion of the thermal head, it becomes possible to use, for example, a metal having good workability for the substrate, and the printed surface Since the peeling angle of the ribbon with respect to the ribbon can be increased, the printing quality is improved in combination with the improvement in the adhesion with the ribbon or the paper, and the effect is extremely large.
第１図は本発明に基づくサーマルヘッドの使用要領を示
す模式図ある。 第２図は第１図のサーマルヘッドを詳細に示す断面図で
ある。 １……プラテン、２……印刷用紙 ３……感熱転写インクリボン ４……サーマルヘッド、4a……本体 ７……基板、８……主面 ９……端面、10……凸Ｒ面 11……ガラスグレーズ層 12……アンダーコート膜 13……発熱抵抗体、14、15……電極膜 16……保護膜FIG. 1 is a schematic diagram showing the usage of the thermal head according to the present invention. FIG. 2 is a sectional view showing the thermal head of FIG. 1 in detail. 1 ... Platen, 2 ... Printing paper 3 ... Thermal transfer ink ribbon 4 ... Thermal head, 4a ... Main body 7 ... Substrate, 8 ... Main surface 9 ... End surface, 10 ... Convex R surface 11 ... … Glass glaze layer 12 …… Undercoat film 13 …… Heating resistor, 14,15 …… Electrode film 16 …… Protective film
Claims (2)
すと共に、前記主面と前記端面との間が、曲率半径Ｒ
（0.1mm≦Ｒ≦0.5mm）の円滑な凸面にて接続され、該凸
面に電気絶縁性材料からなるグレーズ層と複数の発熱体
とが設けられることを特徴とする端部型サマールヘッ
ド。1. An angle formed by a main surface and an end surface of a substrate is an acute angle, and a radius of curvature R is between the main surface and the end surface.
An end type samar head, which is connected by a smooth convex surface (0.1 mm ≦ R ≦ 0.5 mm) and is provided with a glaze layer made of an electrically insulating material and a plurality of heating elements on the convex surface.
0.2mmとなっていることを特徴とする特許請求の範囲第
１項に記載の端部型サーマルヘッド。2. The chordal dimension t'of the convex surface is 0.05 mm≤t'≤
The end type thermal head according to claim 1, wherein the end type thermal head is 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62072198A JPH0761715B2 (en) | 1987-03-26 | 1987-03-26 | Edge type thermal head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62072198A JPH0761715B2 (en) | 1987-03-26 | 1987-03-26 | Edge type thermal head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63237963A JPS63237963A (en) | 1988-10-04 |
| JPH0761715B2 true JPH0761715B2 (en) | 1995-07-05 |
Family
ID=13482292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62072198A Expired - Lifetime JPH0761715B2 (en) | 1987-03-26 | 1987-03-26 | Edge type thermal head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0761715B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5216951A (en) * | 1990-06-14 | 1993-06-08 | Ricoh Company, Ltd. | Thermal plate making apparatus |
| US5666149A (en) * | 1991-01-22 | 1997-09-09 | Ngk Insulators, Ltd. | End-contact type thermal recording head having heat-generating portion on thin-walled end portion of ceramic substrate |
| US5909234A (en) * | 1991-01-22 | 1999-06-01 | Ngk Insulators, Ltd. | End-contact type thermal recording head having heat-generating portion on thin-walled end portion of ceramic substrate |
| US5422661A (en) * | 1991-01-22 | 1995-06-06 | Ngk Insulators, Ltd. | End-contact type thermal recording head having heat-generating portion on thin-walled end portion of ceramic substrate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6198564A (en) * | 1984-10-19 | 1986-05-16 | Fuji Xerox Co Ltd | Thermal head |
-
1987
- 1987-03-26 JP JP62072198A patent/JPH0761715B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63237963A (en) | 1988-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0761715B2 (en) | Edge type thermal head | |
| JPH0710600B2 (en) | Edge type thermal head | |
| JPH02292058A (en) | Thick film type thermal head | |
| JPH11277781A (en) | Thermal head | |
| JP2589164B2 (en) | Substrate structure of thermal head | |
| JPS62255161A (en) | Thermal head | |
| JPH04288244A (en) | Thermal head | |
| JP2002002005A (en) | Thick film type thermal printing head | |
| JPS63237964A (en) | Manufacture of thermal head | |
| JP2750125B2 (en) | Substrate structure of thermal head | |
| JP2546120Y2 (en) | Thermal head | |
| JPS6349451A (en) | Manufacture of thermal head | |
| JPH081092Y2 (en) | Thermal head recorder | |
| JPS63236660A (en) | Production of thermal head | |
| JPS6056570A (en) | Thermal printing head | |
| JP3217546B2 (en) | Printing device using thermal head | |
| JPH04347661A (en) | Thermal printing head | |
| JP2001105643A (en) | Thermal head and manufacturing method thereof | |
| JPS61217264A (en) | Thermal head | |
| JPH0544545U (en) | Thermal head for thermal transfer recording | |
| JPH07205465A (en) | Thermal head and manufacture thereof | |
| JPS6360769A (en) | Thermal head | |
| JP2000211171A (en) | Thermal transfer printer | |
| JPH03199057A (en) | Thermal print head | |
| JPS62158062A (en) | Thermal head and production thereof |