JPH0647296B2 - Thermal print head - Google Patents
Thermal print headInfo
- Publication number
- JPH0647296B2 JPH0647296B2 JP5306985A JP5306985A JPH0647296B2 JP H0647296 B2 JPH0647296 B2 JP H0647296B2 JP 5306985 A JP5306985 A JP 5306985A JP 5306985 A JP5306985 A JP 5306985A JP H0647296 B2 JPH0647296 B2 JP H0647296B2
- Authority
- JP
- Japan
- Prior art keywords
- resistance film
- film
- common terminal
- side edge
- terminals
- 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
- 230000020169 heat generation Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000007639 printing Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
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)
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。TECHNICAL FIELD The present invention relates to a thermal print head.
（従来の技術） サーマルプリントヘッドにおいて、絶縁性の基板の表面
に複数の個別端子と共通端子とを交互に並設し、この各
端子に重なるように帯状の抵抗膜を形成したものは、既
によく知られている。第３図、第４図は従来のこの種サ
ーマルプリントヘッドを示し、１はセラミックなどから
なる絶縁性の基板、２はその表面にたとえば厚膜によっ
て帯状に形成された発熱性の抵抗膜、３は共通端子、４
は共通端子３の一方の端部を連結するように接続する連
続部、５は個別端子である。各個別端子５および共通端
子３は交互に基板１の表面に形成され、また抵抗膜２は
各端子と重なるように形成される。なお実際にはこれら
の表面に保護膜、耐摩耗性の膜などが形成されるのであ
るが、図ではこれらを省略してある。(Prior Art) In a thermal print head, a plurality of individual terminals and a common terminal are alternately arranged in parallel on the surface of an insulating substrate, and a strip-shaped resistance film is formed so as to overlap each terminal. well known. FIGS. 3 and 4 show a conventional thermal print head of this type, wherein 1 is an insulating substrate made of ceramic or the like, 2 is a heat-generating resistive film formed on the surface of the substrate in a strip shape, for example, by a thick film, 3 Is a common terminal, 4
Is a continuous part that connects one end of the common terminal 3 so as to be connected, and 5 is an individual terminal. The individual terminals 5 and the common terminals 3 are alternately formed on the surface of the substrate 1, and the resistance film 2 is formed so as to overlap each terminal. Although a protective film, a wear resistant film, etc. are actually formed on these surfaces, these are omitted in the drawing.
この構成によれば、連続部４と、選択された一つの個別
端子５との間に電圧を印加すれば、両端子間にある抵抗
膜部分に電流が流れ、この電流が流れた部分が発熱す
る。この発熱部分からの熱が感熱紙に伝導されればその
伝導部分が発色する。このようにして所要のプリントを
行う。According to this configuration, when a voltage is applied between the continuous portion 4 and one selected individual terminal 5, a current flows through the resistive film portion between both terminals, and the portion where this current flows generates heat. To do. When the heat from the heat generating portion is conducted to the thermal paper, the conductive portion is colored. In this way, the required printing is performed.
ところでこの種抵抗膜２はスクリーン印刷によって形成
される関係上、その幅方向の断面形状は第４図に示すよ
うに中央が高く、両縁が裾のように低くなる、いわばカ
マボコのような形状に形成される。そのためプリント
時、抵抗膜２の全表面にわたって感熱紙が相対するする
ようなことはなく、その中央付近に相対する一部分に接
触するのにとどまる。そのため一般にはこの抵抗膜２の
幅方向の寸法として、１印字ドットの寸法に対して３０
〜５０％程度広くして形成するようにしている。By the way, since the seed resistance film 2 is formed by screen printing, its cross-sectional shape in the width direction is high at the center and low at both edges like hem, as shown in FIG. Is formed. Therefore, at the time of printing, the thermal paper does not face the entire surface of the resistance film 2, but only touches a portion facing the center thereof. Therefore, in general, the widthwise dimension of the resistance film 2 is 30 with respect to the dimension of one print dot.
It is made wide by about 50%.
一方前記のように端子３，５間に電圧を印加したとき、
その端子間に存在する抵抗膜部分の全部が発熱する。し
かしプリントに関与する部分は前記したように、抵抗膜
の中央部分付近だけであって裾付近は何等関与しない。
したがって裾付近の発熱は前く無駄なものとなる。すな
わちこのような従来の構成では電力損が大きいため発熱
効率が極めて悪い。On the other hand, when a voltage is applied between the terminals 3 and 5 as described above,
The entire resistive film portion existing between the terminals generates heat. However, as described above, the part related to the printing is only near the central part of the resistive film, and there is no part near the hem.
Therefore, heat generation near the hem is wasteful. That is, in such a conventional configuration, since the power loss is large, the heat generation efficiency is extremely poor.
（発明が解決しようとする問題点） この発明はプリントに必要な印字ドット部分のみを発熱
させることによって、発熱効率を高めることを目的とす
る。(Problems to be Solved by the Invention) An object of the present invention is to increase heat generation efficiency by causing only the print dot portion necessary for printing to generate heat.
（問題点を解決するための手段） この発明は各端子を、これが抵抗膜の幅方向に沿って、
かつこれを横切らない程度に形成するとともに、共通端
子の連続部をこれが抵抗膜と互いに重なり合うように形
成したことを特徴とする。(Means for Solving the Problems) The present invention includes terminals, which are arranged along the width direction of the resistance film,
In addition, it is characterized in that it is formed so as not to cross it, and the continuous portion of the common terminal is formed so as to overlap with the resistance film.
（実施例） この発明の実施例を第１図、第２図によって説明する。
なお第３図などと同じ符号を付した部分は同一または対
応する部分を示す。この発明では共通端子３および個別
端子５を抵抗膜２の幅方向に沿って、かつこれを横切ら
ない範囲で形成する。これを具体的に説明すると、前記
のように各個別端子５および共通端子３は、抵抗膜２に
その幅方向に交差して重なり合うように形成されるが、
その場合、まず個別端子５については、抵抗膜２の長手
方向に沿う一方の側縁から、抵抗膜２の中央部を超える
とともに、抵抗膜２の他方の側縁にまでは到達しない範
囲に形成する。(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
In addition, the same reference numerals as those in FIG. 3 indicate the same or corresponding portions. In the present invention, the common terminal 3 and the individual terminal 5 are formed along the width direction of the resistance film 2 and within a range that does not cross the resistance film 2. This will be described in detail. As described above, the individual terminals 5 and the common terminals 3 are formed so as to intersect with and overlap the resistance film 2 in the width direction.
In that case, first, the individual terminals 5 are formed in a range from one side edge along the longitudinal direction of the resistance film 2 to beyond the central portion of the resistance film 2 and not to reach the other side edge of the resistance film 2. To do.
また共通端子３については、抵抗膜２の中央部を超える
とともに、抵抗膜２の一方の側縁にまでは到達しない範
囲に形成する。Further, the common terminal 3 is formed in a range that exceeds the central portion of the resistance film 2 and does not reach one side edge of the resistance film 2.
そして連続部４のうちの少なくとも共通端子３が連結さ
れてある側縁を、抵抗膜２に、前記した他方の側縁より
内側で重ね合わしてある。The side edge of the continuous portion 4 to which at least the common terminal 3 is connected is superposed on the resistance film 2 inside the other side edge.
以上の構成において、連続部４と選択された一つの個別
端子５との間に電圧を印加すると、選択された個別端子
５と、その個別端子の両側にある共通端子３とが向い合
っている箇所に存在している抵抗膜２部分に主として電
流が流れ、この電流の流れた部分が発熱するようにな
る。In the above structure, when a voltage is applied between the continuous portion 4 and one selected individual terminal 5, the selected individual terminal 5 and the common terminals 3 on both sides of the individual terminal face each other. A current mainly flows in the portion of the resistance film 2 existing at the location, and the portion where the current flows generates heat.
このような作用は第３図に示す構成と同じであるにして
も、第１図の構成では両端子３，５の向い合う部分は、
抵抗膜２の、軸方向に沿うその中間部分だけであって、
抵抗膜２の両側縁付近にはほとんど電流は流れない。Even if such an operation is the same as that of the configuration shown in FIG. 3, in the configuration of FIG.
Only the intermediate portion of the resistance film 2 along the axial direction,
Almost no current flows in the vicinity of both side edges of the resistance film 2.
このことは抵抗膜２の、感熱紙と向い合う部分のみが発
熱するようになり、向い合わない部分は発熱しないこと
を意味する。したがって感熱紙の発色のためには何等関
与しない部分での電力損はほとんどないようになるた
め、発熱効率は従来構成よりも向上するようになる。This means that only the portion of the resistance film 2 that faces the thermal paper will generate heat, and the portion that does not face will not generate heat. Therefore, there is almost no power loss in the part that is not involved in coloring the thermal paper, so that the heat generation efficiency is improved as compared with the conventional configuration.
第１図の構成では、隣合う共通端子３をつなぐ連続部４
の側縁を、個別端子５と共通端子３との間の間隔に相当
する距離を半径とする半円形としている。これによれば
１印字ドットを形成する抵抗膜部分では、両端子３，５
間の距離が等しくなるので、発熱量がほぼ均一となって
都合がよい。In the configuration shown in FIG. 1, the continuous portion 4 connecting the common terminals 3 adjacent to each other.
The side edge of is a semicircle having a radius corresponding to the distance between the individual terminal 5 and the common terminal 3. According to this, in the resistive film portion forming one print dot, both terminals 3, 5
Since the distances between them are equal, the amount of heat generated is substantially uniform, which is convenient.
しかし実際には個別端子５の先端に電流が集中し、その
ためこの先端付近の温度が高くなることがあるので、そ
の発熱の程度に応じて個別端子５の位置を適当に変更
し、発熱量の均一化を図るようにすることが望ましい。However, in reality, the current concentrates on the tip of the individual terminal 5, and the temperature near this tip may increase. Therefore, the position of the individual terminal 5 is appropriately changed according to the degree of heat generation, and It is desirable to make it uniform.
なお図の実施例では、端子，連続部などを基板１の表面
に形成しているが、これに代えて抵抗膜２の表面に形成
するようにしてもよい。In the illustrated embodiment, the terminals, continuous portions, etc. are formed on the surface of the substrate 1, but instead of this, they may be formed on the surface of the resistance film 2.
（発明の効果） 以上詳述したようにこの発明によれば、従来構成に比較
して電力の消費は低減され、したがってこの種プリント
に際しての発熱効率を著しく向上させることができる効
果を奏する。(Effect of the Invention) As described in detail above, according to the present invention, the power consumption is reduced as compared with the conventional configuration, and therefore, the heat generation efficiency at the time of printing of this kind can be remarkably improved.
第１図はこの発明の実施例を示す平面図、第２図は同断
面図、第３図は従来例の平面図、第４図は同断面図であ
る。 １……基板、２……抵抗膜、３……共通端子、４……連
続部、５……個別端子、FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is the same sectional view, FIG. 3 is a plan view of a conventional example, and FIG. 4 is the same sectional view. 1 ... Substrate, 2 ... Resistive film, 3 ... Common terminal, 4 ... Continuation part, 5 ... Individual terminal,
Claims (1)
熱用の抵抗膜と、前記抵抗膜に対してその幅方向に交差
して重なるように形成されてあって、互いに交互に並設
されてある複数の個別端子および共通端子と、前記共通
端子の一方の端部を連結するように連続する連続部とを
備えたサーマルプリントヘッドにおいて、 前記各個別端子の前記抵抗膜との重なり領域を、前記抵
抗膜の長手方向に沿う一方の側縁から、前記抵抗膜の中
央部を超え、前記抵抗膜の他方の側縁にまでは到達しな
い範囲とし、また前記各共通端子の前記抵抗膜との重な
り範囲を、前記抵抗膜の中央部を超え、前記抵抗膜の前
記一方の側縁にまでは到達しない範囲とし、更に前記連
続部のうち少なくとも前記共通端子が連結されてある側
縁を、前記抵抗膜に前記他方の側縁より内側で重ね合わ
してなる サーマルプリントヘッド。1. A strip-shaped heat-generating resistance film having a high central portion along the width direction, and is formed so as to overlap the resistance film in the width direction so as to overlap with each other. In a thermal printhead including a plurality of individual terminals and a common terminal that are provided and a continuous portion that is continuous so as to connect one end of the common terminal, the overlapping of the resistive film of each of the individual terminals The region, from one side edge along the longitudinal direction of the resistance film, beyond the central portion of the resistance film, does not reach the other side edge of the resistance film, and the resistance of each common terminal. The overlapping range with the film is a range that exceeds the central portion of the resistance film and does not reach the one side edge of the resistance film, and further the side edge of the continuous portion to which at least the common terminal is connected. The resistance film on the other side A thermal print head that is stacked inside the side edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5306985A JPH0647296B2 (en) | 1985-03-15 | 1985-03-15 | Thermal print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5306985A JPH0647296B2 (en) | 1985-03-15 | 1985-03-15 | Thermal print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61211058A JPS61211058A (en) | 1986-09-19 |
| JPH0647296B2 true JPH0647296B2 (en) | 1994-06-22 |
Family
ID=12932528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5306985A Expired - Lifetime JPH0647296B2 (en) | 1985-03-15 | 1985-03-15 | Thermal print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0647296B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920004866B1 (en) * | 1987-11-19 | 1992-06-19 | 마쓰시다 덴끼 산교오 가부시기 가이샤 | Thermal head |
| JPH01133756A (en) * | 1987-11-19 | 1989-05-25 | Matsushita Electric Ind Co Ltd | Thermal head |
| JPH0751362B2 (en) * | 1988-07-29 | 1995-06-05 | 三菱電機株式会社 | Thermal head |
| JP2583632B2 (en) * | 1990-03-22 | 1997-02-19 | ローム株式会社 | Thick film type thermal head |
| JP2534041Y2 (en) * | 1990-07-14 | 1997-04-30 | 富士ゼロックス株式会社 | Thick film type thermal head |
| JP7001388B2 (en) * | 2017-08-09 | 2022-01-19 | ローム株式会社 | Manufacturing method of thermal print head and thermal print head |
-
1985
- 1985-03-15 JP JP5306985A patent/JPH0647296B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61211058A (en) | 1986-09-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |