JPS6152793B2 - - Google Patents
Info
- Publication number
- JPS6152793B2 JPS6152793B2 JP56076356A JP7635681A JPS6152793B2 JP S6152793 B2 JPS6152793 B2 JP S6152793B2 JP 56076356 A JP56076356 A JP 56076356A JP 7635681 A JP7635681 A JP 7635681A JP S6152793 B2 JPS6152793 B2 JP S6152793B2
- Authority
- JP
- Japan
- Prior art keywords
- thermal head
- voltage
- terminal
- output terminal
- thermal
- 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
Links
- 230000003247 decreasing effect Effects 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 1
- 238000004519 manufacturing process 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
- B41J2/35—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)
Description
【発明の詳細な説明】
本発明は、サーマルヘツドを摩耗、破損、寿命
等により交換しても、サーマルヘツドに常に適正
な電圧が印加されるようにしたサーマル式記録装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal recording device in which an appropriate voltage is always applied to the thermal head even if the thermal head is replaced due to wear, damage, end of life, or the like.
サーマル式記録装置においては、サーマルヘツ
ドの抵抗体に電流を流しその発熱によつて感熱記
録紙上に文字や図形を記録するようになつている
が、サーマルヘツドの抵抗体の抵抗値は製造上個
体差があるため、同一の電圧を与えても使用する
サーマルヘツドの抵抗体の抵抗値によつて発生温
度が異なり、その結果感熱記録紙の発色濃度に差
がでてしまうという問題があつた。そこで、従来
は上記抵抗体の抵抗値に応じて制御回路側の調整
により印加電圧を調整することにより発色濃度に
差が出ないようにしていたが、サーマルヘツドは
消耗品であつてたびたび交換する必要があるた
め、この調整方式ではサーマルヘツドの交換のた
びに印加電圧を再調整しなければならず、煩わし
く且つ面倒であるという問題があつた。 In a thermal recording device, a current is passed through the resistor of the thermal head and the resulting heat is used to record characters and figures on thermal recording paper, but the resistance value of the resistor of the thermal head is individual due to manufacturing reasons. Because of this difference, even if the same voltage is applied, the temperature generated varies depending on the resistance value of the resistor of the thermal head used, and as a result, there is a problem in that the color density of the thermal recording paper differs. Therefore, in the past, the applied voltage was adjusted by adjusting the control circuit according to the resistance value of the resistor to avoid differences in color density, but the thermal head is a consumable item and must be replaced frequently. Therefore, this adjustment method requires readjustment of the applied voltage every time the thermal head is replaced, which is troublesome and troublesome.
本発明は、上記問題点に鑑み、サーマルヘツド
ユニツト側を予め調整するだけでサーマルヘツド
に常に適正電圧が印加されるようにし且つその調
整が極めて容易であるようにしたサーマル式記録
装置を提供せんとするものであるが、以下図示し
た一実施例に基づきこれを説明すれば、第１図は
本実施例の電気回路を示しており、１は出力端子
OUTとリモートセンシング端子RSとを有してい
ると共に出力端子OUTからリモートセンシング
端子RSに帰環ループが形成された場合該端子RS
が一定の電位ＶRを保つように構成された、後述
のサーマルヘツドの抵抗体に印加電圧を供給する
ための定電圧回路、D1，D2，D3は直列接続の状
態で出力端子OUTとリモートセンシング端子RS
との間に接続されて帰環ループを形成している例
えば三個の電圧設定用ダイオード、２は後述のサ
ーマルヘツドの抵抗体を流れる電流のオン・オフ
を制御するためのスイツチング回路、３は端子
OUTからの引出し線、端子RSからの引出し線、
ダイオードD1，D2，D3間の各接続点からの引出
し線、スイツチング回路２からの複数本の引出し
線の各端部を一緒に整列保持しているコネクタで
あつて、これらが制御回路４を構成している。５
は入力端子INと並列接続の状態で該端子INに直
列に接続された複数個の抵抗体R1，R2，R3，R4
とを有するサーマルヘツド、T1，T2，T3は入力
端子INの引出し線に並列に接続された、前記ダ
イオードD1，D2，D3を夫々個別に短絡させるた
めの三個の補助端子、６は入力端子INからの引
出し線、補助端子T1，T2，T3からの各引出し
線、抵抗体R1，R2，R3，R4からの各引出し線の
各端部を一緒に整列保持していると共に上記コネ
クタ３に接続され得るようになつているコネクタ
であつて、これらがサーマルヘツドユニツト７を
構成している。 In view of the above problems, the present invention provides a thermal recording device in which an appropriate voltage is always applied to the thermal head simply by adjusting the thermal head unit in advance, and the adjustment is extremely easy. However, this will be explained based on one embodiment illustrated below. FIG. 1 shows an electric circuit of this embodiment, and 1 is an output terminal.
OUT and a remote sensing terminal RS, and if a return loop is formed from the output terminal OUT to the remote sensing terminal RS, the terminal RS
A constant voltage circuit for supplying voltage to the resistor of the thermal head, which will be described later, is configured to maintain a constant potential V R .D 1 , D 2 , and D 3 are connected in series to the output terminal OUT. and remote sensing terminal RS
For example, three voltage setting diodes are connected between the thermal head and the thermal head to form a return loop, 2 is a switching circuit for controlling on/off of the current flowing through the resistor of the thermal head, which will be described later. terminal
Lead wire from OUT, lead wire from terminal RS,
This is a connector that holds together the ends of the lead wires from each connection point between the diodes D 1 , D 2 , and D 3 and the multiple lead wires from the switching circuit 2, and these are connected to the control circuit. 4. 5
is a plurality of resistors R 1 , R 2 , R 3 , R 4 connected in series to the input terminal IN while being connected in parallel with the input terminal IN.
T 1 , T 2 , T 3 are three auxiliary thermal heads for short-circuiting the diodes D 1 , D 2 , D 3 individually, respectively, connected in parallel to the lead wire of the input terminal IN. Terminals, 6 are lead wires from input terminal IN, each lead wire from auxiliary terminals T 1 , T 2 , T 3 , each end of each lead wire from resistor R 1 , R 2 , R 3 , R 4 The thermal head unit 7 comprises a thermal head unit 7, which holds the thermal head units together in alignment and which can be connected to the connector 3 described above.
本発明によるサーマル式記録装置は上述の如く
構成されているが、まず定電圧回路１の作動原理
について第２図により説明すれば、この回路では
出力端子OUTからリモートセンシング端子RSへ
の帰還ループに電圧設定用ダイオードD1〜Dnが
直列接続の状態で挿入されているので、出力端子
OUTに発生する電圧Voは
Vo＝ＶR＋nVF
となる。ただし、ＶFは一個のダイオードの順電
圧、ｎはダイオードの数（整数）である。従つ
て、ｉ個のダイオードの両端を短絡すれば順電圧
iVFの降下が得られ、電圧Voは
Vo＝ＶR＋（ｎ−ｉ）ＶF
となる。従つて、短絡するダイオードの数によつ
て必要とする電圧が得られることになる。従つ
て、この理論を本実施例に適用すると、第１図に
おいてコネクタ３と６が接続した状態で全ての補
助端子T1，T2，T3が互いに接続されているとす
れば、ダイオードD1，D2，D3が全て短絡される
ので、サーマルヘツド５に印加される電圧Voは
端子RSの電位ＶRと等しくなる。又、補助端子
T1，T2，T3のうち一個を切り離せばVo＝ＶR＋
ＶF、二個を切り離せばVo＝ＶR＋2VF、三個を切
り離せばVo＝3VFとなる。従つて、サーマルヘツ
ド５の抵抗値を予め測定しておくこと等により適
正印加電圧を測定し、その電圧に応じた数の補助
端子を予め切り離しておけば、サーマルヘツド５
には常に適正な印加電圧が与えられることにな
る。従つて、スイツチング回路２によりサーマル
ヘツド５の抵抗体R1，R2，R3，R4を適宜オンせ
しめれば、感熱記録紙上には適正な発色濃度で記
録が行われる。 The thermal recording device according to the present invention is constructed as described above. First, the operating principle of the constant voltage circuit 1 will be explained with reference to FIG. 2. In this circuit, the feedback loop from the output terminal OUT to the remote sensing terminal RS is Voltage setting diodes D 1 to Dn are inserted in series connection, so the output terminal
The voltage Vo generated at OUT is Vo=V R +nV F. However, V F is the forward voltage of one diode, and n is the number of diodes (integer). Therefore, if both ends of i diodes are shorted, the forward voltage
A drop of iV F is obtained, and the voltage Vo becomes Vo=V R +(ni)V F . Therefore, the required voltage can be obtained depending on the number of short-circuited diodes. Therefore, if this theory is applied to this embodiment, if all the auxiliary terminals T 1 , T 2 , and T 3 are connected to each other with connectors 3 and 6 connected in FIG. 1, then the diode D 1 , D2 , and D3 are all short-circuited, the voltage Vo applied to the thermal head 5 becomes equal to the potential VR of the terminal RS. Also, auxiliary terminal
If one of T 1 , T 2 , and T 3 is separated, Vo = V R +
V F , if two are separated, Vo=V R +2V F , and if three are separated, Vo=3V F. Therefore, if the appropriate applied voltage is measured by measuring the resistance value of the thermal head 5 in advance, and the number of auxiliary terminals corresponding to the voltage is disconnected in advance, the thermal head 5 can be
An appropriate applied voltage will always be applied to. Therefore, by appropriately turning on the resistors R 1 , R 2 , R 3 , and R 4 of the thermal head 5 by the switching circuit 2, recording can be performed on the thermal recording paper with an appropriate color density.
第３図は本実施例のサーマルヘツドユニツト７
の具体例を示しており、これは経済性を考慮して
コネクタ６にフレキシブルプリント基板を使用
し、補助端子T1，T2，T3のいくつかをニツパー
等を用いて第４図に示す如く切り離すことにより
サーマルヘツド５への印加電圧を適正な値に設定
するようにしたものである。 Figure 3 shows the thermal head unit 7 of this embodiment.
In this example, a flexible printed circuit board is used for the connector 6 in consideration of economy, and some of the auxiliary terminals T 1 , T 2 , and T 3 are connected using nippers, etc., as shown in Figure 4. By disconnecting the thermal head 5, the voltage applied to the thermal head 5 can be set to an appropriate value.
尚、本発明は上記実施例に限定されず、補助端
子の数を増減したり、本発明の主旨を変えない他
の構造のコネクタを使用したり、電圧設定用ダイ
オードをサーマルヘツドユニツト側のコネクタに
保持させたり、補助端子の切り離し数の増減を切
断法によらず接続法によつて行うようにしても良
い。 Note that the present invention is not limited to the above-mentioned embodiments, and may include increasing or decreasing the number of auxiliary terminals, using connectors with other structures that do not change the gist of the present invention, or changing the voltage setting diode to the connector on the thermal head unit side. Alternatively, the number of auxiliary terminals to be separated may be increased or decreased by a connecting method instead of a cutting method.
以上のように、本発明によるサーマル式記録装
置は、サーマルヘツドユニツト側を予め調整して
おくだけでサーマルヘツドに常に適正電圧が印加
されるようになつているので、従来例の如くサー
マルヘツドの交換のたびに制御回路側の印加電圧
を再調整しなければならないような煩しさは全く
ない。又、上記調整が極めて容易であるので、便
利である。又、上述の如く、サーマルヘツドへの
印加電圧を変えるために選択的に短絡せしめられ
る複数個の直列の電圧設定用ダイオードが、定電
圧回路の出力端子とリモートセンシング端子との
間に帰還ループを形成しいるので、印加電圧の安
定度が高いていう利点がある。又、電圧設定用ダ
イオードは温度変化に対して負の特性を有してい
るので、周囲温度の上昇に対して印加電圧を下げ
る傾向を有し、その結果周囲温度の変化に対して
サーマルヘツドの発熱温度を補正することになる
ので、印字濃度が周囲温度の変化に対しても一定
に保たれるという利点がある。 As described above, in the thermal recording device according to the present invention, an appropriate voltage can always be applied to the thermal head simply by adjusting the thermal head unit side in advance. There is no need to readjust the voltage applied to the control circuit every time it is replaced. Furthermore, the above adjustment is extremely easy and convenient. Also, as mentioned above, a plurality of series voltage setting diodes that are selectively shorted to change the voltage applied to the thermal head create a feedback loop between the output terminal of the constant voltage circuit and the remote sensing terminal. The advantage is that the applied voltage is highly stable. In addition, the voltage setting diode has negative characteristics with respect to temperature changes, so it tends to lower the applied voltage as the ambient temperature rises, and as a result, the thermal head's resistance to changes in ambient temperature increases. Since the heat generation temperature is corrected, there is an advantage that the print density can be kept constant even when the ambient temperature changes.
第１図は本発明によるサーマル式記録装置の一
実施例の電気回路図、第２図は上記実施例の定電
圧回路の理論回路図、第３図は上記実施例のサー
マルヘツドユニツトの具体例を示す図、第４図は
上記実施例において補助端子の切り離し数を増加
せしめた状態を示す図である。
１……定電圧回路、２……スイツチング回路、
３……コネクタ、４……制御回路、OUT……出
力端子、RS……リモーセンシング端子、D1，
D2，D3……電圧設定用ダイオード、５……サー
マルヘツド、６……コネクタ、７……サーマルヘ
ツドユニツト、IN……入力端子、R1，R2，R3，
R4……抵抗体、T1，T2，T3……補助端子。
FIG. 1 is an electric circuit diagram of one embodiment of the thermal recording device according to the present invention, FIG. 2 is a theoretical circuit diagram of the constant voltage circuit of the above embodiment, and FIG. 3 is a specific example of the thermal head unit of the above embodiment. FIG. 4 is a diagram showing a state in which the number of disconnected auxiliary terminals is increased in the above embodiment. 1... Constant voltage circuit, 2... Switching circuit,
3... Connector, 4... Control circuit, OUT... Output terminal, RS... Remote sensing terminal, D 1 ,
D 2 , D 3 ... Voltage setting diode, 5 ... Thermal head, 6 ... Connector, 7 ... Thermal head unit, IN ... Input terminal, R 1 , R 2 , R 3 ,
R 4 ...Resistor, T 1 , T 2 , T 3 ... Auxiliary terminal.
Claims (1)
定電圧回路の出力端子とリモートセンシング端子
との間に直列接続の複数の電圧設定用ダイオード
からなる帰還ループを形成し、前記複数の電圧設
定用ダイオードを個別に短絡させるための複数の
補助端子を前記出力端子に並列接続し、前記補助
端子の切り離し数を増減せしめることにより前記
出力端子における電位を調節し得るようにすると
共に、前記サーマルヘツド側と前記定電圧回路側
とをコネクタを介して接続し得るようにし、前記
補助端子を前記サーマルヘツド側に設けて成るサ
ーマル式記録装置。1. A feedback loop consisting of a plurality of voltage setting diodes connected in series is formed between the output terminal of a constant voltage circuit for supplying a constant voltage to the thermal head and a remote sensing terminal, and the plurality of voltage setting diodes are connected in series. A plurality of auxiliary terminals for individual short-circuiting are connected in parallel to the output terminal, and the potential at the output terminal can be adjusted by increasing or decreasing the number of disconnected auxiliary terminals, and the potential at the output terminal can be adjusted. 1. A thermal recording device that can be connected to a constant voltage circuit side via a connector, and the auxiliary terminal is provided on the thermal head side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7635681A JPS57191076A (en) | 1981-05-20 | 1981-05-20 | Thermal type recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7635681A JPS57191076A (en) | 1981-05-20 | 1981-05-20 | Thermal type recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57191076A JPS57191076A (en) | 1982-11-24 |
| JPS6152793B2 true JPS6152793B2 (en) | 1986-11-14 |
Family
ID=13603077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7635681A Granted JPS57191076A (en) | 1981-05-20 | 1981-05-20 | Thermal type recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57191076A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6868408B1 (en) | 1994-04-28 | 2005-03-15 | Citibank, N.A. | Security systems and methods applicable to an electronic monetary system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59102348U (en) * | 1982-12-27 | 1984-07-10 | 株式会社島津製作所 | thermal printer |
| JPS606483A (en) * | 1983-06-27 | 1985-01-14 | Fuji Xerox Co Ltd | Thermal printer head |
| JPS60171345U (en) * | 1984-04-20 | 1985-11-13 | アルプス電気株式会社 | thermal head |
| JPS61185463A (en) * | 1985-02-14 | 1986-08-19 | Nippon Telegr & Teleph Corp <Ntt> | Thermal recording head |
| JPS6290264A (en) * | 1985-10-16 | 1987-04-24 | Mitsubishi Electric Corp | Method for cutting pattern for code discriminating unit in thermal head |
| JPS62253470A (en) * | 1986-04-26 | 1987-11-05 | Fujitsu Ltd | Thermal head power supply control circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152080A (en) * | 1979-05-16 | 1980-11-27 | Canon Inc | Recorder |
| JPS5627370A (en) * | 1979-08-10 | 1981-03-17 | Canon Inc | Driving device of thermal head |
-
1981
- 1981-05-20 JP JP7635681A patent/JPS57191076A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152080A (en) * | 1979-05-16 | 1980-11-27 | Canon Inc | Recorder |
| JPS5627370A (en) * | 1979-08-10 | 1981-03-17 | Canon Inc | Driving device of thermal head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6868408B1 (en) | 1994-04-28 | 2005-03-15 | Citibank, N.A. | Security systems and methods applicable to an electronic monetary system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57191076A (en) | 1982-11-24 |
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