JPS6038179A - Thermal printing head - Google Patents
Thermal printing headInfo
- Publication number
- JPS6038179A JPS6038179A JP14863583A JP14863583A JPS6038179A JP S6038179 A JPS6038179 A JP S6038179A JP 14863583 A JP14863583 A JP 14863583A JP 14863583 A JP14863583 A JP 14863583A JP S6038179 A JPS6038179 A JP S6038179A
- Authority
- JP
- Japan
- Prior art keywords
- base plate
- heat generator
- substrate
- heating element
- print head
- 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.)
- Granted
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
- B41J2/375—Protection arrangements against overheating
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は熱印字ヘッドに関する。[Detailed description of the invention] The present invention relates to thermal printheads.
従来例の熱印字ヘッドには第１図および第２図に示すも
のがある。すなわち、この熱印字ヘッド１はセラミック
などでできた絶縁性の基板２を備える。この基板２の互
いに対向する一方の表面２ａには発熱体４、接続端子部
６，６・・および発熱体４と接続端子部６．Ｇ・・とを
導電的に接続するだめの導体８，８・・がパターン状に
形成されている。また基板２の他方の表面２ｂには放熱
板１０が固着されている。１２は耐摩耗性を有する保護
層である。Conventional thermal print heads include those shown in FIGS. 1 and 2. That is, this thermal printing head 1 includes an insulating substrate 2 made of ceramic or the like. On one surface 2a of the substrate 2 facing each other are a heating element 4, connection terminal portions 6, 6, . . . Replacement conductors 8, 8, . . . are formed in a pattern to electrically connect G. Further, a heat sink 10 is fixed to the other surface 2b of the substrate 2. 12 is a protective layer having wear resistance.
ところで、従来のこのような熱印字ヘッド１は熱転写方
式のプリンタに使用される場合がある。Incidentally, such a conventional thermal print head 1 may be used in a thermal transfer type printer.
この場合、ローラプラテン１４と熱印字ヘッド１との間
には印字紙１６に加えてさらにポリエステルなどででき
た転写リボン１８が介設される。印字の際はこの転写リ
ボン１８が熱印字ヘッド１と頻繁に接触するため転写リ
ボン１８や熱印字ヘッド１の例えば保護層１２に静電気
が帯電する。従来例の熱印字ヘッド１ではこのような帯
電対策が何ら講じられておらず、このため放電により回
路に異常電流が流れてプリンタか誤動作したりさらには
発熱体４が破損してプリンタが使えなくなるという不具
合を生じる。In this case, in addition to the printing paper 16, a transfer ribbon 18 made of polyester or the like is interposed between the roller platen 14 and the thermal print head 1. During printing, the transfer ribbon 18 frequently comes into contact with the thermal print head 1, so that, for example, the protective layer 12 of the transfer ribbon 18 and the thermal print head 1 is charged with static electricity. The conventional thermal print head 1 does not take any measures against static electricity, and as a result, an abnormal current flows through the circuit due to discharge, causing the printer to malfunction or even damaging the heating element 4, rendering the printer unusable. This will cause a problem.
本発明は上述の問題点に鑑みてなされたものであって、
帯電による発熱体の破損や回路への異常電流の流れ込み
による’ｘ ｃの破損や誤動作の発生を防止することを
目的とする。The present invention has been made in view of the above-mentioned problems, and includes:
The purpose is to prevent damage to the heating element due to charging and damage to the 'xc or malfunction due to abnormal current flowing into the circuit.
本発明はこのような目的を達成するため基板の発熱体と
同一表面上に接地用導体を基板の周縁に清って形成して
いる。In order to achieve this object, the present invention forms a grounding conductor along the periphery of the substrate on the same surface as the heating element of the substrate.
以下、本発明を第３図に示す一実施例に基づいて詳細に
説明する。Hereinafter, the present invention will be explained in detail based on an embodiment shown in FIG.
第３図はこの実施例の熱印字ヘッドの平面図である。こ
の実施例の熱印字ヘッド２０はセラミックでできた平板
状の基板２２を備える。この基板２２の表面上のほぼ中
央に発熱体２４が、また図上下方には発熱体２４を通電
制御する駆動回路（図示せず）へ接続するための接続端
子部２６，２６がそれぞれ形成されている。さらに、発
熱体２４と接続端子部２６．２６・・とは導体２８．２
８・・によって互いに導電的に接続されている。また、
基板２２の発熱体２４が設けられた同じ表面上には接地
用導体３０がこの基板２２の周縁に沿って形成されてい
る。接地用導体３０の一端は図上右下端部に形成された
接地用端子部３２に接続されている。そして、この接地
用端子部３２に接地用端子が接続される。なお、発熱体
２４、接地用導体３０等は基板２２のほぼ全面にわたっ
て形成された耐摩耗性の保護層で被覆されており、また
、基板２２の発熱体２４とは反対側の表面には放熱板が
取付けられている（いずれも図示省略）。FIG. 3 is a plan view of the thermal print head of this embodiment. The thermal print head 20 of this embodiment includes a flat substrate 22 made of ceramic. A heating element 24 is formed approximately in the center of the surface of the substrate 22, and connection terminal portions 26, 26 are formed at the top and bottom of the figure for connecting the heating element 24 to a drive circuit (not shown) that controls energization. ing. Furthermore, the heating element 24 and the connecting terminal portions 26.26... are the conductors 28.2.
8... are electrically conductively connected to each other. Also,
A grounding conductor 30 is formed along the periphery of the substrate 22 on the same surface of the substrate 22 on which the heating element 24 is provided. One end of the grounding conductor 30 is connected to a grounding terminal portion 32 formed at the lower right end in the figure. A grounding terminal is connected to this grounding terminal portion 32. The heating element 24, the grounding conductor 30, etc. are covered with a wear-resistant protective layer formed over almost the entire surface of the substrate 22, and a heat dissipation layer is provided on the surface of the substrate 22 opposite to the heating element 24. A plate is attached (all not shown).
従って、この熱印字ヘッド２０を熱転写方式のプリンタ
に適用した場合などに転写リボンとの接触によって静電
気が生じてもこの静電気は接地ル、導体３０、接地用端
子部３２および図示省略した接地用端子を介してプリン
タの系外にアースされ、熱印字ヘッド１や転写リボンに
は帯電しない。Therefore, even if static electricity is generated due to contact with the transfer ribbon when this thermal print head 20 is applied to a thermal transfer printer, this static electricity will be transferred to the grounding ring, the conductor 30, the grounding terminal section 32, and the grounding terminal (not shown). The thermal print head 1 and the transfer ribbon are not electrically charged.
なお、上記実施例では接地用端子部３２に接地用端子を
接続してアースするようにしているが、接地用導体３０
を基板２２の裏面に設けられた放熱板に導電的に接続し
、この放熱板をアースするようにすることもできる。ま
た、接地用導体３０の形成は本例のように基板２２の周
縁に泪って長く設けることが帯電防止上好ましいが基板
２２０周縁の一部に設けたものであってもよい。In the above embodiment, the grounding terminal is connected to the grounding terminal portion 32 for grounding, but the grounding conductor 30
It is also possible to connect conductively to a heat sink provided on the back surface of the substrate 22, and to ground this heat sink. In addition, although it is preferable to form the grounding conductor 30 in a long manner along the periphery of the substrate 22 as in this example in order to prevent static electricity, it may be formed on a part of the periphery of the substrate 220.
以上のように、本発明によれば基板の表面に発熱体を設
けた熱印字ヘッドの、上記基板の発熱体と同じ表面上に
接地用導体を基板の周縁に沿って形成したので、この接
地用導体を介して静電気が除去される。このため、熱印
字ヘッドは帯電しない。従って、従来のような帯電によ
る発熱体の破損や回路への異常電流の流れ込みによるＩ
Ｃの破損さらにプリンタの誤動作の発生等を防止するこ
とができるという実用上優れた効果が得られる。As described above, according to the present invention, the grounding conductor is formed along the periphery of the substrate on the same surface as the heating element of the substrate of the thermal print head in which the heating element is provided on the surface of the substrate, so that the grounding conductor is grounded. Static electricity is removed through the conductor. Therefore, the thermal print head is not charged. Therefore, unlike conventional methods, damage to the heating element due to charging and abnormal current flowing into the circuit can cause I.
A practically excellent effect can be obtained in that damage to the C and malfunction of the printer can be prevented.
第１図および第２図は従来例を、第３図は本発明の実施
例をそれぞれ示すもので、第１図はプリンタの熱印字ヘ
ッドとローラプラテンの部分を示す断面図、第２図およ
び第３図は熱印字ヘッドの平面図である。
２０・・熱印字ヘッド、２２・・基板、２４・・発熱体
、３０・・接地用導体。
出 願 人 ローム株式会社
代 理 人 弁理士岡田和秀1 and 2 show a conventional example, and FIG. 3 shows an embodiment of the present invention. FIG. 1 is a sectional view showing the thermal print head and roller platen of the printer, and FIGS. FIG. 3 is a plan view of the thermal print head. 20...Thermal print head, 22...Substrate, 24...Heating element, 30...Grounding conductor. Applicant: ROHM Co., Ltd. Agent: Kazuhide Okada, patent attorney
Claims (1)
を設けてなる熱印字ヘッドにおいて、前記基板の発熱体
と同じ表面上には接地用導体がこの基板の周縁に沿って
形成されていることを特徴とする熱印字ヘッド。(1) In a thermal print head comprising an insulating substrate and a heating element provided on the surface of the substrate, a grounding conductor is formed along the periphery of the substrate on the same surface as the heating element. A thermal print head characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14863583A JPS6038179A (en) | 1983-08-11 | 1983-08-11 | Thermal printing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14863583A JPS6038179A (en) | 1983-08-11 | 1983-08-11 | Thermal printing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6038179A true JPS6038179A (en) | 1985-02-27 |
| JPS642069B2 JPS642069B2 (en) | 1989-01-13 |
Family
ID=15457197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14863583A Granted JPS6038179A (en) | 1983-08-11 | 1983-08-11 | Thermal printing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6038179A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62121945U (en) * | 1986-01-24 | 1987-08-03 | ||
| FR2839921A1 (en) * | 2002-05-27 | 2003-11-28 | Axiohm | Thermal printer head includes electrostatic charge collector removing charge from paper to avoid electrostatic damage to print head |
-
1983
- 1983-08-11 JP JP14863583A patent/JPS6038179A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62121945U (en) * | 1986-01-24 | 1987-08-03 | ||
| JPH0644696Y2 (en) * | 1986-01-24 | 1994-11-16 | 日本電気株式会社 | Thermal head |
| FR2839921A1 (en) * | 2002-05-27 | 2003-11-28 | Axiohm | Thermal printer head includes electrostatic charge collector removing charge from paper to avoid electrostatic damage to print head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS642069B2 (en) | 1989-01-13 |
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