JPS6327286A - Printer - Google Patents

Printer

Info

Publication number
JPS6327286A
JPS6327286A JP17022886A JP17022886A JPS6327286A JP S6327286 A JPS6327286 A JP S6327286A JP 17022886 A JP17022886 A JP 17022886A JP 17022886 A JP17022886 A JP 17022886A JP S6327286 A JPS6327286 A JP S6327286A
Authority
JP
Japan
Prior art keywords
data
printing head
ffh
thermistor
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.)
Pending
Application number
JP17022886A
Other languages
Japanese (ja)
Inventor
Kazumi Yanagidaira
一美 柳平
Takafumi Oota
尚文 太田
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP17022886A priority Critical patent/JPS6327286A/en
Publication of JPS6327286A publication Critical patent/JPS6327286A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/42Scales and indicators, e.g. for determining side margins

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To simplify hardware around a printing head, by mounting a means for judging whether the printing head is mounted on a printer main body from the data read by the thermistor of the printing head and a means for displaying the non-mounting of the printing head when no printing head is mounted. CONSTITUTION:The thermistor 3 arranged to a printing head 1 applies analogue data (10) at usual temp. of 5-65 deg.C and said data is converted to HEX (hexadecimal) data in CPU4 (20). When no printing head is mounted, the circuit in a carrier 2 is opened and the resistance value between terminals to be originally connected of the thermistor becomes infinite and the data received by CPU comes to FFH. Then, CPU judges whether the data is FFH (0) and, when the data is not FFH, the transfer to usual processing is performed (60) and, when the data is FFH, it is judged that no head is mounted and, in an operator panel lamp, the putting-ON/OFF of head non-mounting display is carried out (40). As error processing, this state is held (50) until the power source of a printer main body is cut off. Therefore, the hardware around the printing head can be simplified without requiring a special circuit.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はプリンタに関し、特にサーマルプリンタに関す
る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to printers, and particularly to thermal printers.

〔従来の技術〕[Conventional technology]

印字ヘッドの着脱、交換が容易にできるプリンタにおい
ては、誤って印字ヘッド全未装着のまま、または正しく
装着しないで動作させて、印字不良または故障の原因と
なることがある。これケ避けるため従来、この種のプリ
ンタは、ヘッドが装着されているか全判断する手段とし
て、第3図に示すように特別な回路を設けて判断してい
た。
In printers in which the print head can be easily attached, detached, and replaced, it is possible to accidentally operate the printer with the print head completely unattached or with the print head improperly attached, which may cause printing defects or malfunctions. In order to avoid this problem, printers of this type have conventionally installed a special circuit as shown in FIG. 3 as a means for fully determining whether a head is attached.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

サーマルプリンタは、印字ヘッドが持っている各ドツト
に熱を与えその熱によってインクリボンのインクを溶か
し、紙にインクを転写するか、もしくは、リボンを用い
ずに感熱紙を使用し、印字するものであるが、連続して
印字すると、前に印字した時の熱が印字ヘッドの各ドツ
トに残り、次の文字を印字するために必要な熱量より多
くの熱が印字ヘッドの各ドツトに与えられて、文字がつ
ぶれてしまうという現象が起るため、ヘプトの蓄熱を制
御しなければならない。従来のプリンタは第3図に示す
とh″す、印字ヘッドにコネクタ100そしてキャリア
には、コネクタが差し込まれることにより、印字へ、ラ
ドが装着されたことを検出する回路200を別に設計し
なければならず、そのため印字ヘッド周辺のハードが複
雑になり、大きくなってしまうという欠点があった。
Thermal printers print by applying heat to each dot in the print head and using that heat to melt the ink on an ink ribbon and transferring the ink to paper, or by using thermal paper without a ribbon. However, when printing continuously, the heat from the previous print remains in each dot of the print head, and more heat is applied to each dot of the print head than is required to print the next character. Because of this phenomenon, the letters become crushed, so the heat accumulation in the hept must be controlled. In a conventional printer, as shown in FIG. 3, a connector 100 is attached to the print head, and a circuit 200 must be separately designed to detect when the connector is inserted into the carrier that the RAD is attached to the print head. As a result, the hardware around the print head becomes complicated and large, which is a drawback.

〔問題点fe解決するための手段〕[Means to solve the problem fe]

本発明のプリンタは、サーミスタを装着した印字ヘッド
と、このサーミスタから読み込んだデータから印字ヘッ
ドがプリンタ本体に装着されて9るかを判定する手段と
、未装着であった場合にはその旨を表示する手段とを有
している。
The printer of the present invention includes a print head equipped with a thermistor, a means for determining whether the print head is attached to the printer body based on data read from the thermistor, and a means for determining whether the print head is attached to the printer main body, and a means for determining that if the print head is not attached. and display means.

〔実施例〕〔Example〕

次に本発明について図を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第1図は本発明のブロック図、第2図が一実施例のフロ
ーチャートである。印字ヘッド1に設置されたサーミス
タ3は通常の温f5℃〜65℃でのアナログ・データを
与える(10))与えられたアナログ・データをCPU
4において、HEX(16進)データに変換する(20
)。この際、変換されるHEXデータは1バイトであり
、通常の温度でのとりうる値が03H〜IOHとなるよ
う設置しである。印字ヘッドが装着されていない場合は
、キャリア2での回路がオープンとなり、本来サーミス
タの接続されるべき端子間の抵抗値が無限大となり、C
PUで受けとったデータけFF■Iとなる。
FIG. 1 is a block diagram of the present invention, and FIG. 2 is a flowchart of one embodiment. The thermistor 3 installed in the print head 1 provides analog data at a normal temperature f5°C to 65°C (10)).
4, convert to HEX (hexadecimal) data (20
). At this time, the HEX data to be converted is 1 byte, and the setting is such that the possible values at normal temperatures are 03H to IOH. If the print head is not attached, the circuit in carrier 2 becomes open, and the resistance value between the terminals to which the thermistor should normally be connected becomes infinite, causing C
The data received by PU becomes FF■I.

よって、CPUね°データがF F I−1がどうがを
判断しく30χ FFHでなかった場合は通常処理へ移
り(60χ FFl1のときはヘッドが装着されてない
ものと判断し、オペレータ・パネル(OPP)ランプに
おいて、ヘッド未装着表示の点滅(4o)を実行する。
Therefore, if the CPU speed data is not 30χ FFH, it is difficult to judge whether FFI-1 is FF I-1, and if it is not 30χ FFH, the process goes to normal processing. OPP) lamp flashes (4o) to indicate that the head is not installed.

そして、エラー処理として、プリンタ本体の電源が切ら
れるまでこの状態を保持する(50.)。
Then, as an error process, this state is maintained until the printer main body is powered off (50).

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、ヘッドサーミスタから読
み込んだデータから印字ヘッドが装着さ1、ているかを
判断することにより、特別の回路を必要とせず、印字ヘ
ッド周辺のハードを単純化でき、よりコンパクトな装置
ft提供できる効果がある0
As explained above, the present invention makes it possible to simplify the hardware around the print head without requiring a special circuit by determining whether the print head is attached based on data read from the head thermistor. A compact device with the effect of providing ft.

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

第1図は本発明のブロック図、簗÷個妊套濠滋貧℃ブー
1−毒し第2図は本発明のフローチャート、第3図は従
来例のブロック図である。
FIG. 1 is a block diagram of the present invention, FIG. 2 is a flowchart of the present invention, and FIG. 3 is a block diagram of a conventional example.

Claims (1)

【特許請求の範囲】[Claims] サーミスタを装着した印字ヘッドと、前記サーミスタか
ら読み込んだデータによって印字ヘッドがプリンタ本体
に正しく装着されているかを判定する手段と、未装着ま
たは装着不良であった場合にはその旨を表示する手段と
を有することを特徴とするプリンタ。
A print head equipped with a thermistor, a means for determining whether the print head is correctly installed in the printer body based on data read from the thermistor, and a means for displaying a message to that effect if the print head is not installed or is installed incorrectly. A printer characterized by having:
JP17022886A 1986-07-18 1986-07-18 Printer Pending JPS6327286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17022886A JPS6327286A (en) 1986-07-18 1986-07-18 Printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17022886A JPS6327286A (en) 1986-07-18 1986-07-18 Printer

Publications (1)

Publication Number Publication Date
JPS6327286A true JPS6327286A (en) 1988-02-04

Family

ID=15901041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17022886A Pending JPS6327286A (en) 1986-07-18 1986-07-18 Printer

Country Status (1)

Country Link
JP (1) JPS6327286A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0740574A (en) * 1993-07-29 1995-02-10 Nec Corp Thermal printer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131474A (en) * 1983-01-18 1984-07-28 Sharp Corp Thermal printer
JPS60151069A (en) * 1984-01-20 1985-08-08 Konishiroku Photo Ind Co Ltd Thermal transfer printer
JPS6120761A (en) * 1984-07-09 1986-01-29 Ishida Scales Mfg Co Ltd Temperature controlling circuit for thermal head

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131474A (en) * 1983-01-18 1984-07-28 Sharp Corp Thermal printer
JPS60151069A (en) * 1984-01-20 1985-08-08 Konishiroku Photo Ind Co Ltd Thermal transfer printer
JPS6120761A (en) * 1984-07-09 1986-01-29 Ishida Scales Mfg Co Ltd Temperature controlling circuit for thermal head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0740574A (en) * 1993-07-29 1995-02-10 Nec Corp Thermal printer

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