CN108569036A - thermal printing head automatic current driving circuit - Google Patents
thermal printing head automatic current driving circuit Download PDFInfo
- Publication number
- CN108569036A CN108569036A CN201810571128.1A CN201810571128A CN108569036A CN 108569036 A CN108569036 A CN 108569036A CN 201810571128 A CN201810571128 A CN 201810571128A CN 108569036 A CN108569036 A CN 108569036A
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- CN
- China
- Prior art keywords
- capacitance
- printing head
- npn type
- type triode
- thermal printing
- 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
- 238000007651 thermal printing Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000007639 printing Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method 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
- Emergency Protection Circuit Devices (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
A kind of thermal printing head automatic current driving circuit, including capacitance C1（1）, capacitance C2（2）, diode D1（3）, NPN type triode Q1（4）, resistance R1（5）, negative temperature coefficient resister RT1（6）, capacitance C3（7）.Negative temperature coefficient resister RT1 is pasted on the thermal head cooling fin of thermal printer（6）, when thermal printing head temperature is relatively low, NPN type triode Q1（4）Base voltage is higher, NPN type triode Q1（4）Conducting, NPN type triode Q1（4）Internal resistance is smaller between collector emitter, and electric current is mainly from NPN type triode Q1（4）It flows through, provides larger operating current to thermal printing head rapidly, ensure normal big data quantity printing；When thermal printing head temperature is stepped up negative temperature coefficient resister RT1（6）Internal resistance gradually reduces, NPN type triode Q1（4）Conducting degree gradually weakens, and supplies the current decay of thermal printing head, printing is slack-off, protects thermal printing head.
Description
Technical field
The present invention relates to a kind of thermal printing head automatic current driving circuits.
Background technology
Currently, thermal head is the component of a unusual core in thermal printer, price accounts for the 1/3 of entire printer
Left and right, and this print head longevity is limited, using for as bank's Automatic Teller Machine strip printer, normal service life is just
As soon as being half a year to year, word can not be clearly printed more than this time print head, is also eliminated, replaced be equivalent to every time
1/3 thermal printer is bought, it is with high costs, so must think that various methods promote print head longevity, reduce thermal printer
Use cost.
Invention content
The present invention to solve the above-mentioned problems, provides a kind of thermal printing head automatic current driving circuit, by heat
Negative temperature coefficient resister is pasted on quick printer thermal head cooling fin, and transient current supply amount on thermal printing head is controlled with this, with
This regulates and controls print speed and printhead temperature, seeks new balance therebetween, is printed with sacrificing certain acceptable
Speed, to control printhead temperature, to be obviously improved print head longevity, life-span upgrading is 50% or so, remarkable in economical benefits.
To achieve the above object, the technical solution adopted by the present invention is：It includes capacitance C1（1）, capacitance C2（2）, two poles
Pipe D1（3）, NPN type triode Q1（4）, resistance R1（5）, negative temperature coefficient resister RT1（6）, capacitance C3（7）.The capacitance C1
（1）Anode meets+24 DC power supplies, capacitance C1（1）Cathode is grounded；The capacitance C2（2）+ 24 DC power supplies of upper termination, capacitance C2
（2）Lower end is grounded；The resistance R1（5）+ 24 DC power supplies of upper termination, resistance R1（5）Lower termination NPN type triode Q1（4）Base
Pole and negative temperature coefficient resister RT1（6）Upper end；The NPN type triode Q1（4）Collector connects+24 DC power supplies and diode
D1（3）Anode, NPN type triode Q1（4）Emitter meets diode D1（3）Cathode and capacitance C3（7）Upper end；The negative temperature system
Number resistance RT1（6）Lower end is grounded；The capacitance C3（7）Lower end is grounded.
Further, the D1（2）Anode meets+5 volt power supplys, D1（2）Cathode meets D2（3）Cathode, R1（4）Upper end, C1（9）
Anode；The capacitance C1（1）Anode meets+24 DC power supplies, capacitance C1（1）Cathode is grounded；The capacitance C2（2）Upper termination+24
DC power supply, capacitance C2（2）Lower end is grounded；The resistance R1（5）+ 24 DC power supplies of upper termination, resistance R1（5）Lower termination NPN
Type triode Q1（4）Base stage and negative temperature coefficient resister RT1（6）Upper end；The NPN type triode Q1（4）It is straight that collector connects+24
Galvanic electricity source and diode D1（3）Anode, NPN type triode Q1（4）Emitter meets diode D1（3）Cathode and capacitance C3（7）On
End；The negative temperature coefficient resister RT1（6）Lower end is grounded；The capacitance C3（7）Lower end is grounded.
The triode transistor Q1（4）Model 2N1711.
The negative temperature coefficient resister RT1（6）Model NCP15WL473.
The diode D1（3）Model 1N4148.
The invention has the advantages that：The present invention can be negative by being pasted on thermal printer thermal head cooling fin
Temperature coefficient of resistance controls transient current supply amount on thermal printing head with this, regulates and controls print speed and print head temperature with this
Degree, seeks new balance therebetween, to sacrifice certain acceptable print speed, to control printhead temperature, to
It is obviously improved print head longevity, life-span upgrading is 50% or more, remarkable in economical benefits.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, thermal printing head automatic current driving circuit includes capacitance C1（1）, capacitance C2（2）, diode D1
（3）, NPN type triode Q1（4）, resistance R1（5）, negative temperature coefficient resister RT1（6）, capacitance C3（7）.The capacitance C1（1）Just
Pole meets+24 DC power supplies, capacitance C1（1）Cathode is grounded；The capacitance C2（2）+ 24 DC power supplies of upper termination, capacitance C2（2）Under
End ground connection；The resistance R1（5）+ 24 DC power supplies of upper termination, resistance R1（5）Lower termination NPN type triode Q1（4）Base stage and negative
Temperature coefficient of resistance RT1（6）Upper end；The NPN type triode Q1（4）Collector connects+24 DC power supplies and diode D1（3）Just
Pole, NPN type triode Q1（4）Emitter meets diode D1（3）Cathode and capacitance C3（7）Upper end；The negative temperature coefficient resister
RT1（6）Lower end is grounded；The capacitance C3（7）Lower end is grounded.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (4)
1. thermal printing head automatic current driving circuit, it is characterised in that：Including capacitance C1（1）, capacitance C2（2）, diode D1
（3）, NPN type triode Q1（4）, resistance R1（5）, negative temperature coefficient resister RT1（6）, capacitance C3（7）；The capacitance C1（1）Just
Pole meets+24 DC power supplies, capacitance C1（1）Cathode is grounded；The capacitance C2（2）+ 24 DC power supplies of upper termination, capacitance C2（2）Under
End ground connection；The resistance R1（5）+ 24 DC power supplies of upper termination, resistance R1（5）Lower termination NPN type triode Q1（4）Base stage and negative
Temperature coefficient of resistance RT1（6）Upper end；The NPN type triode Q1（4）Collector connects+24 DC power supplies and diode D1（3）Just
Pole, NPN type triode Q1（4）Emitter meets diode D1（3）Cathode and capacitance C3（7）Upper end；The negative temperature coefficient resister
RT1（6）Lower end is grounded；The capacitance C3（7）Lower end is grounded.
2. thermal printing head automatic current driving circuit according to claim 1, it is characterised in that：The triode transistor
Q1（4）Model 2N1711.
3. thermal printing head automatic current driving circuit according to claim 1, it is characterised in that：The negative temperature coefficient
Resistance RT1（6）Model NCP15WL473.
4. thermal printing head automatic current driving circuit according to claim 1, it is characterised in that：The diode D1
（3）Model 1N4148.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810571128.1A CN108569036B (en) | 2018-06-06 | 2018-06-06 | Automatic current driving circuit of thermal print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810571128.1A CN108569036B (en) | 2018-06-06 | 2018-06-06 | Automatic current driving circuit of thermal print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108569036A true CN108569036A (en) | 2018-09-25 |
| CN108569036B CN108569036B (en) | 2024-03-19 |
Family
ID=63573105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810571128.1A Active CN108569036B (en) | 2018-06-06 | 2018-06-06 | Automatic current driving circuit of thermal print head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108569036B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849526A (en) * | 2018-12-29 | 2019-06-07 | 厦门汉印电子技术有限公司 | Thermal printhead heats voltage control circuit and printing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6918071A (en) * | 1968-12-31 | 1970-07-02 | ||
| JPH0284058A (en) * | 1988-09-19 | 1990-03-26 | Hitachi Ltd | Resonance type power supply and heat-sensitive printer using same |
| US6476838B1 (en) * | 1999-09-03 | 2002-11-05 | Oki Data America, Inc. | Method of driving a thermal print head |
| CN107244146A (en) * | 2017-05-31 | 2017-10-13 | 青岛海信智能商用系统股份有限公司 | Thermal printing head temperature-control circuit and thermal printer |
| CN208593165U (en) * | 2018-06-06 | 2019-03-12 | 昆明理工大学津桥学院 | Thermal printing head automatic current driving circuit |
-
2018
- 2018-06-06 CN CN201810571128.1A patent/CN108569036B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6918071A (en) * | 1968-12-31 | 1970-07-02 | ||
| JPH0284058A (en) * | 1988-09-19 | 1990-03-26 | Hitachi Ltd | Resonance type power supply and heat-sensitive printer using same |
| US6476838B1 (en) * | 1999-09-03 | 2002-11-05 | Oki Data America, Inc. | Method of driving a thermal print head |
| CN107244146A (en) * | 2017-05-31 | 2017-10-13 | 青岛海信智能商用系统股份有限公司 | Thermal printing head temperature-control circuit and thermal printer |
| CN208593165U (en) * | 2018-06-06 | 2019-03-12 | 昆明理工大学津桥学院 | Thermal printing head automatic current driving circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849526A (en) * | 2018-12-29 | 2019-06-07 | 厦门汉印电子技术有限公司 | Thermal printhead heats voltage control circuit and printing device |
| CN109849526B (en) * | 2018-12-29 | 2021-06-11 | 厦门汉印电子技术有限公司 | Heating voltage control circuit of thermal printing head and printing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108569036B (en) | 2024-03-19 |
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