JPS59192585A - Thermal recorder - Google Patents

Thermal recorder

Info

Publication number
JPS59192585A
JPS59192585A JP6694083A JP6694083A JPS59192585A JP S59192585 A JPS59192585 A JP S59192585A JP 6694083 A JP6694083 A JP 6694083A JP 6694083 A JP6694083 A JP 6694083A JP S59192585 A JPS59192585 A JP S59192585A
Authority
JP
Japan
Prior art keywords
thermal head
temperature
head
thermal
heater
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.)
Pending
Application number
JP6694083A
Other languages
Japanese (ja)
Inventor
Eiji Akimoto
秋元　英治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP6694083A priority Critical patent/JPS59192585A/en
Publication of JPS59192585A publication Critical patent/JPS59192585A/en
Pending legal-status Critical Current

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
    • B41J2/35—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 providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control
    • B41J2/365—Print density control by compensation for variation in temperature
    • 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
    • B41J2/35—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 providing current or voltage to the thermal head

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To maintain a thermal head at a fixed temperature and prevent the so- called sticking phenomenon from occurring, by a method wherein a heater provided in surface contact with the face side or back side of a thermal head is turned ON and OFF as required. CONSTITUTION:The heater 5 for heating the thermal head 1 is sheet-like in shape, is provided with a heating pattern 6, and is adhered to a fitting part 3 located on the back side of the thermal head 1. When the thermal head 1 is heated to a preset temperature by the heater 5, the condition is detected by a temperature-detecting means, e.g., a thermistor, and impressing of a voltage on the heater 5 is restricted by OFF control of the thermistor. When the surface temperature of the head 1 is lowered below a preset temperature, a voltage is impressed on the heater 5 by ON control of the thermistor. Accordingly, the surface temperature of the head 1 is maintained to be constant irrespectively of the ambient temperature. The means for heating the head 1 may be located on the face side of the head.

Description

【発明の詳細な説明】 （技術分野） 本発明は、印字コントロールを安定に行うことが出来る
感熱記録装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an improvement in a thermal recording device that can stably perform printing control.

（従来技術） 第１図は従来の感熱記録装置のサーマルヘッドにおける
温度検知を行うサーミスタの抵抗変化と、ヘッド印加電
圧と、発色濃度との関係を示す図である。図中、Ｒはサ
ーミスタの抵抗、Ｒ１は抵抗の変化カーブ、Ｈｒはヘッ
ド印加電圧、Ｈｒｌは印加電圧の変化カーブ、ｒは記録
紙の発色濃度、ｒｌは発色濃度の変化カーブ、Ｔはサー
マルヘッドの温度を各々示すものである。以下、図面に
したがって説明する。(Prior Art) FIG. 1 is a diagram showing the relationship between the resistance change of a thermistor for detecting temperature in a thermal head of a conventional thermal recording device, the voltage applied to the head, and the color density. In the figure, R is the resistance of the thermistor, R1 is the resistance change curve, Hr is the head applied voltage, Hrl is the applied voltage change curve, r is the color density of the recording paper, rl is the color density change curve, T is the thermal head This shows the temperature of each. This will be explained below with reference to the drawings.

従来の感熱記録装置における印字コントロールは、サー
ミスタを使用して行っていた。す々わち、サーマルヘッ
ドの温度の上昇、下降に関係なく一定の印字濃度を得る
為、前記サーマルヘッドの温度の上昇、下降を抵抗の変
化カーブＲ１で示す如きサーミスタの抵抗変化で感知し
、それに応じてｒ　９　） サーマルヘッドへの印加電圧をその変化カーブＨｒ１に
示す如くコントロールし、あらかじめ設定した目標最適
濃度を得るように制御していた。すなわち、サーマルヘ
ッドの温度上昇があると、サーミスタの抵抗の減少によ
って検出し、これによりサーマルヘッドへの印加電圧を
低くして一定の印字濃度が得られるように制御している
のである。Printing control in conventional thermal recording devices has been performed using a thermistor. In other words, in order to obtain a constant print density regardless of the rise or fall of the temperature of the thermal head, the rise or fall of the temperature of the thermal head is detected by the resistance change of a thermistor as shown by the resistance change curve R1, Accordingly, the voltage applied to the r 9 ) thermal head was controlled as shown in the change curve Hr1 to obtain a preset target optimum density. That is, if there is a temperature rise in the thermal head, it is detected by a decrease in the resistance of the thermistor, and the voltage applied to the thermal head is thereby controlled to be lowered to obtain a constant print density.

しかしながら、サーミスタの抵抗の変化カーブＲ１は、
印加電圧による発色濃度の変化カーブｒ１と一致させる
ことが出来ない為、この種の装置の使用環境温度内での
低温使用時と、高温使用時とを較べてみると、同じ印字
性能を得ることは困難であった。又、装置調整時、ある
いは検査時等での印字濃度の試験は、その時の環境温度
に左右され、温特試験での印字性能の確認にも多くの時
間を必要とする等の問題点があった。更に、第１図から
も理解されるようにサーマルヘッドの温度状態、換言す
ると、低温状態の時と高温状態の時とは印加電圧もそれ
に応じて変化させるのでサーマルヘッドの寿命の点から
も問題があるのである。However, the resistance change curve R1 of the thermistor is
Since it is not possible to match the change curve r1 of color density due to applied voltage, when using this type of device at a low temperature within the operating environment temperature and when using it at a high temperature, it is found that the same printing performance can be obtained. was difficult. In addition, printing density tests during equipment adjustment or inspections are affected by the environmental temperature at the time, and there are problems such as requiring a lot of time to confirm printing performance in temperature characteristics tests. Ta. Furthermore, as can be understood from Figure 1, the temperature state of the thermal head, in other words, the applied voltage changes accordingly when it is in a low temperature state and when it is in a high temperature state, which poses a problem in terms of the lifespan of the thermal head. There is.

又、印字部は前記サーマルヘッドとプラテンローラとで
構成され、その間は数ミリメートルでサーマルヘッドも
しくはプラテンローラの長さだけ接触し、その間を感熱
紙が通過し、印字されるのである。そして、電圧印加に
よるサーマルヘッドの発熱により感熱紙の可融成分を溶
解し、凝固させ、発色とするものであシ、この為、加熱
により溶解した可融成分がその凝固の際に、プラテンロ
ーラによりサーマルヘッドに密着されていることから、
そのサーマルヘッドが低温であったとすると、前記可融
成分は急速に凝固し、その部分がサーマルヘッド上に付
着する、所謂スティッキングの現象が起こる恐れもある
のである。Further, the printing section is composed of the thermal head and the platen roller, and there is contact between them for the length of the thermal head or the platen roller, and the thermal paper passes between them to print. The heat generated by the thermal head due to voltage application dissolves and solidifies the fusible components of the thermal paper to produce color.For this reason, when the fusible components melted by heating solidify, the platen roller Because it is in close contact with the thermal head,
If the thermal head is at a low temperature, the fusible component will rapidly solidify and the so-called sticking phenomenon may occur, in which the solidified portion adheres to the thermal head.

（発明の目的） 本発明はこのような点を考慮してなされたものであって
、温度環境の厳しい使用場所であっても、一定の印字性
能を確保出来る、しかもサーマルヘッドの寿命およびス
ティッキング等の問題点も解決した感熱記録装置を提供
することを目的とする。(Purpose of the Invention) The present invention has been made in consideration of the above points, and is capable of ensuring constant printing performance even in locations with severe temperature environments, and also improving the lifespan of the thermal head and preventing sticking. An object of the present invention is to provide a heat-sensitive recording device that solves the above problems.

（発明の構成） すなわち、本発明はこの種の装置において、サーマルヘ
ッドの表面もしくは裏面に面接触してヒータを配置し、
それを必要に応じてＯＮ．ＯＦＦさせる構成としたもの
で、これによりサーマルヘッドを一定温度に保ち、上記
の目的を達成するのである。以下、図面を用いて本発明
に係る感熱記録装置を詳細に説明する。(Structure of the Invention) That is, in this type of device, the present invention disposes a heater in surface contact with the front or back surface of the thermal head,
Turn it on as necessary. This is configured to turn off the thermal head, thereby keeping the thermal head at a constant temperature and achieving the above purpose. EMBODIMENT OF THE INVENTION Hereinafter, the thermal recording device based on this invention is demonstrated in detail using drawings.

（実施例） 第２図は本発明に係る感熱記録装置の印字部構造の一実
施例を示す図で、同図（ａ）はその全体を示す外観図、
同図（ｂ）はその断面図、同図（Ｃ）はその裏面図であ
る。これらの図において、１はサーマルヘッド、２はプ
ラテンローラ、３は前記サーマルヘッドの取付部材、４
は感熱紙である。又、５はシート状のヒータであって、
サーマルヘッドを暖める手段である。このヒータ５は、
発熱パターン６と、それに電圧印加するコード７を有し
て成るシート状のもので、例えば耐熱性の接着剤を用い
、サーマルヘッド１の裏面に位置する取付部材３に貼り
付けられている。(Example) Fig. 2 is a diagram showing an example of the structure of the printing part of the thermal recording device according to the present invention, and Fig. 2 (a) is an external view showing the entire structure;
The figure (b) is a sectional view thereof, and the figure (C) is a back view thereof. In these figures, 1 is a thermal head, 2 is a platen roller, 3 is a mounting member for the thermal head, and 4 is a thermal head.
is thermal paper. Further, 5 is a sheet-shaped heater,
This is a means of heating the thermal head. This heater 5 is
It is a sheet-like material having a heat generating pattern 6 and a cord 7 for applying voltage thereto, and is attached to the mounting member 3 located on the back surface of the thermal head 1 using, for example, a heat-resistant adhesive.

（５） 以上の構成において、ヒータ５に外部環境温度に応じて
あらかじめ設定した電圧を印加し、取付部材３を介して
サーマルヘッド１を暖める。これにより暖められたサー
マルヘッド１は、その表面温度が上昇することになる。(5) In the above configuration, a voltage preset according to the external environmental temperature is applied to the heater 5 to warm the thermal head 1 via the mounting member 3. The surface temperature of the thermal head 1 thus warmed increases.

そして、サーマルヘッド１があらかじめ設定した温度壕
で上昇すると、その状態は図示しない温度検出手段、例
えばサーミスタによシ検出され、あらかじめ設定した温
度より上昇するとサーミスタのオフ制御によりヒータ５
への電圧印加が制限される。一方、サーマルヘッド１０
表面温度があらかじめ設定した温度より下降すると、サ
ーミスタのオン制御によりヒータ５への電圧印加が行々
われる。以上のサーミスタのオン、オフ制御により外部
温度のいかんにかかわらずサーマルヘッド１の表面温度
を一定に保つことが出来るのである。When the temperature of the thermal head 1 rises to a preset temperature level, the state is detected by a temperature detection means (not shown), such as a thermistor, and when the temperature rises above the preset temperature, the heater 5 is turned off by the thermistor.
Voltage application to is restricted. On the other hand, thermal head 10
When the surface temperature falls below a preset temperature, voltage is applied to the heater 5 by turning on the thermistor. By controlling the on/off of the thermistor as described above, the surface temperature of the thermal head 1 can be kept constant regardless of the external temperature.

なお、以上の実施例では、ヒータをシート状のものとし
たが、ブロック型のヒータでもよいことは明らかであり
、更に、サーマルヘッドを暖める手段は、サーマルヘッ
ドの裏面ではなく、紙送り（６） と紙押圧機能をもつプラテンローラに構成するサーマル
ヘッドの表面に配してもよいことはこれまでの説明から
明らかである。In the above embodiments, the heater is in the form of a sheet, but it is clear that a block-type heater may also be used.Furthermore, the means for heating the thermal head is not the back surface of the thermal head, but the paper feed (6 ) It is clear from the above description that it may be arranged on the surface of a thermal head configured on a platen roller having a paper pressing function.

（発明の効果） 以上、詳細に述べたように本発明によれば、サーマルヘ
ッドの表面あるいは裏面に該サーマルヘッドを暖める手
段を配し、この暖める手段をサーミスタ等であらかじめ
定めた一定温度でオン、オフさせてサーマルヘッドを一
定温度に保つ構成としたので、外部環境温度に左右され
ずに常に同じ印字性能が得られ、又、目標載適濃度を得
る為にザーマルヘッドヘ印加する電圧は、前記手段によ
るサーマルヘッド表面温度のかさ上げ分があるので、低
い設定で可能となり、しかも、サーマルヘッド表面温度
が一定であるので高い電圧をかける必要がなく々る等、
サーマルヘッドの寿命の点に）　　おいて有利である。(Effects of the Invention) As described above in detail, according to the present invention, means for warming the thermal head is disposed on the front or back surface of the thermal head, and the heating means is turned on at a constant temperature predetermined by a thermistor or the like. Since the configuration is such that the thermal head is kept at a constant temperature by being turned off, the same printing performance can always be obtained regardless of the external environmental temperature, and the voltage applied to the thermal head in order to obtain the target appropriate density is controlled by the above-mentioned means. Since there is an increase in the thermal head surface temperature due to the thermal head surface temperature, it is possible to use a low setting.Moreover, since the thermal head surface temperature is constant, there is no need to apply a high voltage, etc.
This is advantageous in terms of the lifespan of the thermal head.

更に、サーミスタを使用しても、その抵抗カーブ（第１
図参照）に関係なく使用する環境温度に応じたオン、オ
フ動作の為の閾値の決め方で暖める手段、実施例ではヒ
ータの温度を自由に選択することが出来るので、精度の
高いサーミスタを使用する必要もなく、最近の印字品質
の良い感熱紙の使用で問題になっているスティッキング
の発生もサーマルヘッド全体の温度が上昇している為に
発生しずらくなる等の効果が期待できるのである。Furthermore, even if a thermistor is used, its resistance curve (first
(Refer to the figure) As a means of heating by determining the threshold value for on/off operation according to the environmental temperature used, in the example, the temperature of the heater can be freely selected, so a highly accurate thermistor is used. There is no need for this, and it can be expected that sticking, which has become a problem with the use of recent thermal paper with good printing quality, will be less likely to occur because the temperature of the entire thermal head is rising.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は感熱記録装置における各種構成の関係を示す図
、第２図は本発明に係る感熱記録装置の印字部構造の一
実施例を示す図である。 １はサーマルヘッド、２はプラテンローラ、３は取付部
材、４は感熱紙、５はヒータ、６は発熱ノやターン、７
はコードである。 特許出願人　沖電気工業株式会社FIG. 1 is a diagram showing the relationship between various components in a thermal recording device, and FIG. 2 is a diagram showing an embodiment of the structure of a printing section of a thermal recording device according to the present invention. 1 is a thermal head, 2 is a platen roller, 3 is a mounting member, 4 is a thermal paper, 5 is a heater, 6 is a heating plate and a turn, 7
is the code. Patent applicant Oki Electric Industry Co., Ltd.

Claims (1)

【特許請求の範囲】 （１）　　サーマルヘッドを用いて成る感熱記録装置に
おいて、サーマルヘッドの表面あるいは裏面に、該サー
マルヘッドを暖める手段を配置し、この手段をあらかじ
め定めた一定温度でオン、オフ制御を行い、サーマルヘ
ッドを一定温度に保つことを特徴とする感熱記録装置。 （２）裏面に配置するサーマルヘッドを暖める手段を、
サーマルヘッドの取付部材に発熱ハターンを有するンー
ト状にして密着構成としたことを特徴とする特許請求の
範囲第（１）項記載の感熱記録装置。 （３）　　表面に配置するサーマルヘッドを暖める手段
を、サーマルヘッドに接触するプラテンローラに構成し
たことを特徴とする特許請求の範囲第（１）項記載の感
熱記録装置。 （１）[Claims] (1) In a thermal recording device using a thermal head, a means for warming the thermal head is arranged on the front or back surface of the thermal head, and the means is turned on and off at a predetermined constant temperature. A thermal recording device that performs control to maintain a thermal head at a constant temperature. (2) A means to warm the thermal head placed on the back side,
2. The thermal recording device according to claim 1, wherein the mounting member of the thermal head is formed into a net-like structure having a heat-generating pattern in close contact with the mounting member. (3) The thermal recording device according to claim (1), wherein the means for warming the thermal head disposed on the surface is constituted by a platen roller that comes into contact with the thermal head. (1)
JP6694083A 1983-04-18 1983-04-18 Thermal recorder Pending JPS59192585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6694083A JPS59192585A (en) 1983-04-18 1983-04-18 Thermal recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6694083A JPS59192585A (en) 1983-04-18 1983-04-18 Thermal recorder

Publications (1)

Publication Number Publication Date
JPS59192585A true JPS59192585A (en) 1984-10-31

Family

ID=13330502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6694083A Pending JPS59192585A (en) 1983-04-18 1983-04-18 Thermal recorder

Country Status (1)

Country Link
JP (1) JPS59192585A (en)

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