JPH0661949B2 - Thermal print head - Google Patents
Thermal print headInfo
- Publication number
- JPH0661949B2 JPH0661949B2 JP5307085A JP5307085A JPH0661949B2 JP H0661949 B2 JPH0661949 B2 JP H0661949B2 JP 5307085 A JP5307085 A JP 5307085A JP 5307085 A JP5307085 A JP 5307085A JP H0661949 B2 JPH0661949 B2 JP H0661949B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- common
- terminals
- resistance film
- external lead
- 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
- B41J2/345—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。このような構成のサーマルプリン
トヘッドにおいて、前記抵抗膜を基板の一方の端縁にで
きるだけ接近して設置することが要求されることがあ
り、その場合には前記各端子のすべてを、抵抗膜の前記
端縁とは反対側の側縁から引出す必要がある。(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. In the thermal print head having such a structure, it may be required to install the resistance film as close as possible to one edge of the substrate, and in that case, all of the terminals are arranged in the resistance film. It is necessary to pull out from the side edge opposite to the edge.
第３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は個別端子である。各共通端子
３および個別端子４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。FIG. 3 shows a conventional thermal print head of this type,
Reference numeral 1 is an insulative substrate made of ceramic or the like, 2 is a heat-generating resistance film formed in a strip shape on the surface thereof, for example, by a thick film, 3 is a common terminal, and 4 is an individual terminal. The common terminals 3 and the individual terminals 4 are alternately formed on the surface of the substrate 1,
The resistance film 2 is formed so as to overlap each terminal.
図のように抵抗膜２を基板１の一方の端縁１Ａに接近し
て設置した場合、各端子３，４を、抵抗膜２の前記端縁
１Ａとは反対側の側縁から引出すようにする。図では個
別端子４を基板１の表面に形成した場合、各個別端子４
を横切るように絶縁膜５を形成し、この絶縁膜５の表面
に外部引出端子６を形成してから、この外部引出端子６
と各共通電極３とをワイヤボンディングによって接続す
るようにしている。７はその接続に使用したワイヤであ
る。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。When the resistance film 2 is installed close to one edge 1A of the substrate 1 as shown in the figure, the terminals 3 and 4 are drawn out from the side edge of the resistance film 2 opposite to the edge 1A. To do. In the figure, when the individual terminals 4 are formed on the surface of the substrate 1, each individual terminal 4
The insulating film 5 is formed so as to cross the insulating film 5, and the external lead terminal 6 is formed on the surface of the insulating film 5, and then the external lead terminal 6 is formed.
And each common electrode 3 are connected by wire bonding. 7 is a wire used for the connection. Actually, a protective film, a wear-resistant film and the like are formed on these surfaces, but these are omitted in the figure.
この構成によれば、外部引出端子６と、選択された一つ
の個別端子４との間に電圧を印加すれば、その個別端子
４の両側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 external lead-out terminal 6 and one selected individual terminal 4, a current flows through the resistance film portions on both sides of the individual terminal 4, and this current flows. Generated heat. 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.
ところでこの構成からも理解されるように、隣合う各端
子３，４によって区画された抵抗膜部分を単位領域とし
た場合、個別端子４をはさんでその両側にある２個の単
位領域をもって１印字ドットを作っていることになる
が、このような構成では１印字ドット当り、１個の共通
端子３が必要となり、そのすべての共通端子３を個々に
外部引出端子６に接続しなければならない。By the way, as can be understood from this configuration, when the resistance film portion partitioned by the adjacent terminals 3 and 4 is used as a unit area, two unit areas on both sides of the individual terminal 4 are provided as one unit area. Although print dots are made, one common terminal 3 is required for each print dot in such a configuration, and all the common terminals 3 must be individually connected to the external lead-out terminal 6. .
そのため各端子３，４の配線密度が高くなってそのパタ
ーニングが面倒となるばかりでなく、各共通端子３と外
部引出端子６との接続箇所の数も多いため、その接続作
業も面倒であった。Therefore, not only the wiring density of each terminal 3 and 4 becomes high and its patterning becomes troublesome, but also the number of connecting points between each common terminal 3 and the external lead-out terminal 6 is large, so that the connecting work is also troublesome. .
（発明が解決しようとする問題点） この発明は共通端子の配線密度の低減化と、共通端子と
外部引出端子との接続箇所の数の減少化を図ることを目
的とする。(Problems to be Solved by the Invention) An object of the present invention is to reduce the wiring density of the common terminal and the number of connection points between the common terminal and the external lead terminal.
（問題点を解決するための手段） この発明は、発熱用の抵抗膜と、前記抵抗膜と重なり、
かつ前記抵抗膜の幅方向に沿って互いに交互に位置する
ように形成されてある複数の個別端子及び複数の共通端
子とを備え、前記共通端子のうちの複数の共通端子を連
続部によって連続するとともに、その連続部によって連
続された共通端子のうちの少なくともひとつの共通端子
を延長し、この延長された共通端子を外部引出端子に接
続してなることを特徴とする。(Means for Solving Problems) The present invention relates to a resistance film for heat generation and an overlap with the resistance film,
And a plurality of individual terminals and a plurality of common terminals formed so as to be alternately positioned along the width direction of the resistance film, and a plurality of common terminals of the common terminals are connected by a continuous portion. At the same time, at least one common terminal among the common terminals continuous by the continuous portion is extended, and the extended common terminal is connected to the external lead-out terminal.
（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
４を抵抗膜２の幅方向に沿って、かつ交互に位置するよ
うに形成する。そして複数の共通端子３は連続部８によ
って連続される。(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 4 are formed along the width direction of the resistance film 2 and alternately. The plurality of common terminals 3 are connected by the connecting portion 8.
そして連続部８に連なる複数の共通端子３のうちの任意
のひとつを延長し、その延長された共通端子（図の例で
は３Ａ）は外部引出端子６に、ワイヤボンディングによ
って接続される。Then, any one of the plurality of common terminals 3 connected to the continuous portion 8 is extended, and the extended common terminal (3A in the example of the drawing) is connected to the external lead terminal 6 by wire bonding.
以上の構成によれば、連続部８は共通端子３Ａを介して
外部引出端子６に接続される。したがって外部引出端子
６と選択された一つの個別端子４との間に電圧を印加す
ると、選択された個別端子４と、その個別端子の両側に
ある共通端子３との間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。この発熱によって所要のプリントが行われる
ようになる。According to the above configuration, the continuous portion 8 is connected to the external lead terminal 6 via the common terminal 3A. Therefore, when a voltage is applied between the external lead terminal 6 and one selected individual terminal 4, the resistance existing between the selected individual terminal 4 and the common terminals 3 on both sides of the selected individual terminal 4 is An electric current mainly flows through the membrane 2, and the portion where the electric current flows generates heat. This heat generation causes desired printing.
この構成では、第３図のように共通端子の全てを、外部
引出端子６に接続する必要はないので、すべての共通端
子を外部引出端子の近くまで導出する必要はない。した
がって共通端子の、外部引出端子への接続のための配線
密度は低くなる。また複数の共通端子のうちのひとつを
外部引出端子６に接続すればよいので、その接続数は少
なくてすむ。In this configuration, it is not necessary to connect all the common terminals to the external lead terminals 6 as shown in FIG. 3, so it is not necessary to lead all the common terminals close to the external lead terminals. Therefore, the wiring density for connecting the common terminal to the external lead terminal is low. Further, since it is only necessary to connect one of the plurality of common terminals to the external lead terminal 6, the number of connections can be small.
なお一つの共通端子３Ａを介して、外部引出端子６に接
続される共通端子３の数は、連続部８および共通端子３
Ａの電流容量および電気抵抗によってほぼ定められるこ
とは容易に理解されるところである。The number of common terminals 3 connected to the external lead-out terminals 6 via one common terminal 3A is the same as that of the continuous portion 8 and the common terminal 3.
It is easily understood that it is almost determined by the current capacity and electric resistance of A.
なお第１図の構成では、隣合う共通端子３をつなぐ連続
部８の側縁を、個別端子４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
３，４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 of FIG. 1, the side edges of the continuous portion 8 connecting the common terminals 3 adjacent to each other are semicircular with the radius corresponding to the distance between the individual terminals 4 and the common terminals 3. According to this, in the resistance film portion forming one print dot, the distances between the terminals 3 and 4 are equal, which is convenient because the amount of heat generation is substantially uniform.
また図の実施例では、個別、共通両端子を基板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, both the individual and common terminals 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
して共通端子の配線密度を低下させるとともに、共通端
子と外部引出端子との接続箇所の数を少なくすることが
できる効果を奏する。(Effects of the Invention) As described in detail above, according to the present invention, it is possible to reduce the wiring density of the common terminal and reduce the number of connection points between the common terminal and the external lead terminal as compared with the conventional configuration. There is an effect that can be done.
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である。 １……基板、２……抵抗膜、３……共通端子、４……個
別端子、６……外部引出端子、８……連続部、FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view of the same, and FIG. 3 is a plan view of a conventional example. 1 ... Substrate, 2 ... Resistive film, 3 ... Common terminal, 4 ... Individual terminal, 6 ... External lead terminal, 8 ... Continuous part,
Claims (1)
かつ前記抵抗膜の幅方向に沿って互いに交互に位置する
ように形成されてある複数の個別端子及び複数の共通端
子とを備え、前記共通端子のうちの複数の共通端子を連
続部によって連続するとともに、その連続部によって連
続された共通端子のうちの少なくともひとつの共通端子
を延長し、この延長された共通端子を外部引出端子に接
続してなるサーマルプリントヘッド。1. A resistance film for heat generation and an overlap with the resistance film,
And a plurality of individual terminals and a plurality of common terminals that are formed so as to be alternately positioned along the width direction of the resistance film, and a plurality of common terminals of the common terminals are connected by a continuous portion. At the same time, at least one of the common terminals connected by the connecting portion is extended, and the extended common terminal is connected to the external lead terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5307085A JPH0661949B2 (en) | 1985-03-15 | 1985-03-15 | Thermal print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5307085A JPH0661949B2 (en) | 1985-03-15 | 1985-03-15 | Thermal print head |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32011191A Division JPH0661948B2 (en) | 1991-09-27 | 1991-09-27 | Thermal print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61211059A JPS61211059A (en) | 1986-09-19 |
| JPH0661949B2 true JPH0661949B2 (en) | 1994-08-17 |
Family
ID=12932555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5307085A Expired - Lifetime JPH0661949B2 (en) | 1985-03-15 | 1985-03-15 | Thermal print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0661949B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01133756A (en) * | 1987-11-19 | 1989-05-25 | Matsushita Electric Ind Co Ltd | Thermal head |
| JPH088829Y2 (en) * | 1990-02-20 | 1996-03-13 | ローム株式会社 | Thermal head |
| JP2878631B2 (en) * | 1995-10-11 | 1999-04-05 | ローム株式会社 | Thermal head |
| JP2899552B2 (en) * | 1995-10-11 | 1999-06-02 | ローム株式会社 | 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 JP5307085A patent/JPH0661949B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61211059A (en) | 1986-09-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |