CN103448391A - Inkjet printing device - Google Patents
Inkjet printing device Download PDFInfo
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- CN103448391A CN103448391A CN2013104577579A CN201310457757A CN103448391A CN 103448391 A CN103448391 A CN 103448391A CN 2013104577579 A CN2013104577579 A CN 2013104577579A CN 201310457757 A CN201310457757 A CN 201310457757A CN 103448391 A CN103448391 A CN 103448391A
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Abstract
The invention discloses an inkjet printing device which comprises a switch power supply, a main control board and a nozzle control board. Supply voltage supplies power to the switch power supply through the switch power supply. The inkjet printing device is characterized in that an intelligent shutdown circuit is arranged between the supply voltage and the switch power supply and comprises a signal providing part and a power supply switching part, the intelligent shutdown circuit is used before shutdown, the main control board controls the nozzle control board to shut off a drive signal of a nozzle, then a logic signal of the nozzle is shut off, and finally the main control board sends a shutdown signal to the signal providing part of the intelligent shutdown circuit to shut off the power supplied by the supply voltage to the switch power supply and achieve shutdown. Therefore, the effect of protecting the nozzle is achieved.
Description
Technical field
The present invention relates to a kind of inkjet-printing device, relate to specifically a kind of inkjet-printing device with Bye-byes function.
Background technology
Inkjet printing sprays ink droplet by shower nozzle and form required print image to print media.Be divided into micro-piezoelectric type shower nozzle and hot bubble type sprays first two according to the ink-jet principle of shower nozzle, chemical change easily occurs in the hot bubble type shower nozzle under 350-400 ℃ of high temperature due to ink, and character is unstable, and the real colour of getting can be subject to impact to a certain extent; Because ink sprays by bubble, the directionality of ink particulate and volume size are difficult for grasping, and print line edge easily uneven, have affected to a certain extent print quality on the other hand; Micro-piezoelectric type shower nozzle is the characteristic of electric discharge while utilizing the crystal pressurization, stable ink is sprayed under the normal temperature state.Stronger to the ink droplet control ability, also color dot is dwindled manyly, the ink dot of generation does not have the comet tail yet, thereby makes the image printed more clear.Easily realize the high accuracy print quality up to 1440dpi, and during micro-piezoelectric ink jet without heating, ink is with regard to chemical change not occurring because being heated, therefore greatly reduce the requirement to ink.
Piezoelectric ink jet is printed and is referred to by piezo-electric crystal, applying voltage, makes it to occur at a high speed and slight distortion, and the printing ink in black chamber is extruded from nozzle, realizes the printing of image or word.Do the used time when piezo-electric crystal is subject to extraneous pulse voltage, piezo-electric crystal produces the volume reducing that distortion causes the nozzle ink cavity.Like this, an oil dripping China ink just penetrates from nozzle.Then, piezo-electric crystal restores to the original state, and due to surface tension effects, new printing ink enters nozzle.By the large flow nozzle that is arranged side by side, just can obtain desirable spray printing width and resolution.What the piezoelectric type shower nozzle was strict powers on and the power down order, and the order powered on is: logic circuit-high-voltage pulse, the order of power down: high-voltage pulse-logic circuit.Nozzle control panel is often installed by the layman in factory, there will be that electric power polarity connects instead, high pressure and the problems such as low pressure is put upside down, overtension, and the supply voltage shakiness easily causes the impact to shower nozzle, serious damage shower nozzle.For the protection shower nozzle, inkjet-printing device all needs to detect work and the location status of a series of parts before the open and close machine, and need to complete some necessary operations and work in coordination with the work of peripheral circuit and the program that powers on.Guarantee when power-off operation, first fall high-voltage pulse electric during the power down of shower nozzle, then fall the logic circuit electricity.Therefore, in the time of routine use large-format ink-jet printing equipment, be sure not to pull out by force the attaching plug shutdown.
Summary of the invention
The problem existed for prior art; the object of the invention is to propose a kind of inkjet-printing device with Bye-byes function; first fall the high-voltage pulse electric of shower nozzle while being used for guaranteeing to shut down, then fall the logic circuit electricity of shower nozzle, thereby reach the effect of protection shower nozzle.
For achieving the above object, the present invention proposes a kind of inkjet-printing device and comprises Switching Power Supply, master board and nozzle control panel, supply voltage is powered to master board through Switching Power Supply, it is characterized in that, be provided with a Bye-byes circuit between described supply voltage and described Switching Power Supply, described Bye-byes circuit comprises that signal provides part and power supply conversion portion, described signal provides part to comprise input interface JP1, resistance R 6, R7, diode D10, photoelectrical coupler O2 and voltage VCC, the off signal of master board output connects 1 pin of input interface JP1, 1 pin of input interface JP1 connects 1 pin of photoelectrical coupler O2 by resistance R 7, 3 pin of input interface JP1 connect 2 pin of photoelectrical coupler O2 by diode D1, the 3 pin ground connection of photoelectrical coupler O2, 4 pin of photoelectrical coupler O2 are connected with voltage VCC by resistance R 6, 4 pin of photoelectrical coupler O2 also connect the base stage of triode T1.Described power supply transform portion comprises current-limiting circuit, rectification circuit, Zener diode DV1, filter capacitor CT1, triode T1 and relay G1, described current-limiting circuit consists of the first capacitor C 1 and the second capacitor C 2, the first capacitor C 1 be serially connected on the live wire L of supply voltage after the second capacitor C 2 is in parallel, supply voltage connects by diode D5 after current-limiting circuit, D6, the rectification circuit that D7 and D8 form, at the two ends of rectification circuit and meet Zener diode DV1, filter capacitor CT1 is attempted by the two ends of Zener diode DV1, filter capacitor CT1 powers to Switching Power Supply output through relay G1, grounded emitter at triode T1, one end of the collector connecting relay G1 coil of triode T1, the voltage VCC end of another termination filter capacitor CT1 of relay G1 coil.During shutdown, master board is controlled nozzle control panel and is cut off successively the driving signal of shower nozzle and the logical signal of shower nozzle, then by master board, to the signal of Bye-byes circuit, provide part one high level, the triode T1 cut-off of power supply conversion portion is cut off supply voltage and is realized shutdown to the Switching Power Supply power supply.
Described voltage VCC is that supply voltage is through the voltage after current limliting, rectification, voltage stabilizing.
Described supply voltage is 220V.
At the two ends of described relay G1 coil and meet a diode D2.
Described power supply conversion portion also comprises the resistance R 1 and light emitting diode D1 at the two ends that are attempted by filter capacitor CT1, and resistance R 1 is connected in series with light emitting diode D1, another termination voltage VCC of resistance R 1.
With respect to prior art; inkjet-printing device of the present invention can guarantee that by a Bye-byes circuit is set between 220V supply voltage and Switching Power Supply power down at shower nozzle voltage is sequentially for first falling to drive signal then to fall logical signal, thereby effectively protects shower nozzle.
The accompanying drawing explanation
The shower nozzle control system schematic diagram that Fig. 1 is inkjet-printing device in prior art;
The shower nozzle control system schematic diagram that Fig. 2 is inkjet-printing device in the present invention;
Fig. 3 is the schematic diagram of Bye-byes circuit under normal print state in the present invention;
Fig. 4 is the schematic diagram of Bye-byes circuit under off-mode in the present invention.
The specific embodiment
Below describe with reference to the accompanying drawings inkjet-printing device of the present invention in detail and how to realize Bye-byes.
The shower nozzle control system schematic diagram that Fig. 1 is inkjet-printing device of the prior art, in prior art the 220V supply voltage by Switching Power Supply to master board, nozzle control panel and the power supply of peripheral hardware plate, master board receives the work of each electric elements in each sensor signal control circuit, and sends print data to nozzle control panel, and nozzle control panel is controlled shower nozzle work, when shutdown, direct cutting electromechanical source, be difficult to guarantee the power down order of shower nozzle, easily damages shower nozzle.
The shower nozzle control system schematic diagram that Fig. 2 is inkjet-printing device in the present invention, with respect to the schematic diagram of the shower nozzle control system of prior art, the present invention is provided with a Bye-byes circuit between 220V supply voltage and Switching Power Supply.The power down that realizes shower nozzle by the Bye-byes circuit, sequentially for first falling high-voltage pulse electric, is then fallen the logic circuit electricity, last cutting electromechanical source, thus reach the effect of protection shower nozzle.
Fig. 3 is Bye-byes modular circuit schematic diagram under normal print state, Bye-byes modular circuit of the present invention comprises that signal provides part and power supply conversion portion, wherein stimulus part comprises input interface JP1, resistance R 6 and R7, diode D10 is, the master board output signal meets the input interface JP1 of Bye-byes module, 1 pin of input interface JP1 is by 1 pin of resistance R 7 serial connection photoelectrical coupler O2, 3 pin of input interface JP1 connect 2 pin of photoelectrical coupler O2 by diode D10, the 3 pin ground connection of photoelectrical coupler O2, 4 pin of photoelectrical coupler O2 connect the 5V supply voltage by resistance R 6, also be connected in series the base stage of triode T1 between 4 pin of photoelectrical coupler O2 and resistance R 6.R1 wherein, R6 plays metering function, and diode D10 is for anti-reverse.
Described power supply conversion portion is, the first capacitor C 1 be connected on the live wire of 220V alternating supply voltage after the second capacitor C 2 is in parallel, utilize the capacitive reactance characteristic of electric capacity to alternating current, alternating current is carried out to current limliting, thereby forms bleeder circuit.Voltage after current limliting passes through by four diode D5, D6, the full-wave rectifying circuit that D7 and D8 form.The effect of rectification circuit is to convert the voltage alternating current of ac buck circuit output to unidirectional pulsating nature direct current.At the two ends of rectification circuit and meet a Zener diode DV1, after access Zener diode DV1, even because voltage fluctuates, or other reason is while causing in circuit the each point variation in voltage, and the voltage at load two ends will remain unchanged substantially.At the two ends of Zener diode DV1 and meet a filter capacitor CT1 and exchange pulsation and promote efficient smooth direct current output in order to reduce, by being set, filter capacitor make the service behaviour of circuit more stable, also reduced the interference of alternation pulse ripple to electronic circuit simultaneously.The capacitance of general filter capacitor is larger, and filtering performance is better, and in order to obtain better DC stabilization coefficient, capacitance is typically chosen in hundreds of microfarads or more than thousand microfarads.Be attempted by the two ends of filter condenser CT1 after light emitting diode D1 and resistance R 1 serial connection, at the negative pole of filter capacitor CT1, be connected in series the emitter and collector of triode T1 with the negative pole of Light-Emitting Diode D1.The base stage of triode T1 connects the master board signal output part, at the two ends of filter capacitor CT1 also and meet a diode D2, for anti-reverse electromotive force, at the two ends of diode D2 and succeed electrical equipment G1, the output interface of relay G1 connects to master board, the Switching Power Supply of the power supply such as nozzle control panel.
Under the inkjet-printing device normal operating conditions, 1 pin of input interface JP1 is low level, not conducting of photoelectrical coupler O2, now 3 pin of photoelectrical coupler O2 and 4 not conductings of pin, the voltage of 4 pin is voltage VCC, now 1 pin of triode T1 is high level, triode T1 conducting, the contact 5 of relay G1 is connected with contact 3, now 1 pin of relay output interface JP2 and 2 pin are connected, and relay output interface JP2 connects Switching Power Supply, and Switching Power Supply is to nozzle control panel, master board and the power supply of peripheral hardware plate, wherein R1 plays metering function, and diode D10 is for anti-reverse.
During power-off operation, press the shutdown button, master board is received after off signal to nozzle control panel one signal, nozzle control panel first cuts off the high-voltage pulse electric of shower nozzle, then cut off the logic circuit electricity of shower nozzle, after nozzle high-voltage Pulse Electric and logic circuit electricity are closed, master board is to 1 pin one high level of the input interface JP1 of Bye-byes module, now photoelectrical coupler O2 conducting, 4 pin of photoelectrical coupler and 3 pin conductings, 4 pin ground connection, 1 pin of triode T1 is low level, triode T1 cut-off, the contact 5 of relay G1 is connected with contact 4, 1 pin of relay output interface JP2 and 2 pin disconnect, thereby cut off the electricity of 220V supply voltage to Switching Power Supply, realize the complete machine shutdown.
The present invention, by the high-voltage pulse electric that first falls shower nozzle is set when a Bye-byes circuit can effectively guarantee to shut down between supply voltage and Switching Power Supply, then falls the logic circuit electricity of shower nozzle, last cutting electromechanical source, thus reach the effect of protection shower nozzle.
It is to be noted and any distortion of doing according to the specific embodiment of the present invention all do not break away from the scope that spirit of the present invention and claim are put down in writing.
Claims (7)
1. an inkjet-printing device, comprise Switching Power Supply, master board and nozzle control panel, supply voltage is powered to master board and nozzle control panel through Switching Power Supply, it is characterized in that, be provided with a Bye-byes circuit between described supply voltage and described Switching Power Supply, described Bye-byes circuit comprises that signal provides part and power supply conversion portion, before shutdown, the driving signal that nozzle control panel first cuts off shower nozzle is controlled in master board, cut off again the logical signal of shower nozzle, finally by master board, to the signal of Bye-byes circuit, provide part one off signal, cut off supply voltage and realize shutdown to the Switching Power Supply power supply.
2. inkjet-printing device as claimed in claim 1, it is characterized in that, described signal provides part to comprise input interface JP1, resistance R 6, R7, diode D10 and photoelectrical coupler O2, the off signal of master board output connects 1 pin of input interface JP1,1 pin of input interface JP1 connects 1 pin of photoelectrical coupler O2 by resistance R 7,3 pin of input interface connect 2 pin of photoelectrical coupler O2 by diode D1, the 3 pin ground connection of photoelectrical coupler O2,4 pin of photoelectrical coupler O2 meet voltage VCC by resistance R 6, and 4 pin of photoelectrical coupler O2 also connect the base stage of triode T1.
3. inkjet-printing device as claimed in claim 1, it is characterized in that, described power supply transform portion comprises current-limiting circuit, rectification circuit, Zener diode DV1, filter capacitor CT1, triode T1 and relay G1, described current-limiting circuit consists of the first capacitor C 1 and the second capacitor C 2, the first capacitor C 1 be serially connected on the live wire L of supply voltage after the second capacitor C 2 is in parallel, supply voltage connects by diode D5 after the current-limiting circuit dividing potential drop, D6, the rectification circuit that D7 and D8 form, at the two ends of rectification circuit and meet Zener diode DV1, filter capacitor CT1 is attempted by the two ends of Zener diode DV1, filter capacitor CT1 powers to Switching Power Supply output through relay G1, grounded emitter at triode T1, one end of the collector connecting relay G1 coil of triode T1, the voltage VCC end of another termination filter capacitor CT1 of relay G1 coil.
4. inkjet-printing device as claimed in claim 2, is characterized in that, described voltage VCC is that supply voltage is through the voltage after current limliting, rectification, voltage stabilizing.
5. inkjet-printing device as claimed in claim 3, is characterized in that, described supply voltage is 220V.
6. inkjet-printing device as claimed in claim 3, is characterized in that, at the two ends of described relay G1 coil and meet a diode D2.
7. inkjet-printing device as claimed in claim 3, is characterized in that, described power supply conversion portion also comprises resistance R 1 and the light emitting diode D1 at the two ends that are attempted by filter capacitor CT1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310457757.9A CN103448391B (en) | 2013-09-30 | 2013-09-30 | A kind of inkjet-printing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310457757.9A CN103448391B (en) | 2013-09-30 | 2013-09-30 | A kind of inkjet-printing device |
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| CN103448391A true CN103448391A (en) | 2013-12-18 |
| CN103448391B CN103448391B (en) | 2016-03-30 |
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| CN201310457757.9A Active CN103448391B (en) | 2013-09-30 | 2013-09-30 | A kind of inkjet-printing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085189A (en) * | 2014-07-08 | 2014-10-08 | 北京美科艺数码科技发展有限公司 | Heating protective circuit |
| CN104085193A (en) * | 2014-07-08 | 2014-10-08 | 北京美科艺数码科技发展有限公司 | Spraying head protective circuit and spraying head control panel |
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| US5801724A (en) * | 1995-10-18 | 1998-09-01 | Samsung Electronics Co., Ltd. | Circuit for preventing ink clogging in print nozzles of a print head in an ink jet printer |
| US6481814B2 (en) * | 2001-02-28 | 2002-11-19 | Lemark International, Inc. | Apparatus and method for ink jet printhead voltage fault protection |
| CN1322382C (en) * | 2002-07-15 | 2007-06-20 | 三星电子株式会社 | Device for controlling printing machine power supply and its method |
| CN102371763A (en) * | 2010-08-10 | 2012-03-14 | 北京美科艺数码科技发展有限公司 | Anti-spray head reverse voltage serial circuit |
| CN102377161A (en) * | 2010-08-18 | 2012-03-14 | 北京美科艺数码科技发展有限公司 | Piezoelectric nozzle protection circuit |
| CN202275293U (en) * | 2011-09-21 | 2012-06-13 | 重庆地质仪器厂 | Shutdown control circuit and transient emission system having same |
| CN203496469U (en) * | 2013-09-30 | 2014-03-26 | 北京美科艺数码科技发展有限公司 | Ink-jet printing device |
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2013
- 2013-09-30 CN CN201310457757.9A patent/CN103448391B/en active Active
Patent Citations (7)
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| US5801724A (en) * | 1995-10-18 | 1998-09-01 | Samsung Electronics Co., Ltd. | Circuit for preventing ink clogging in print nozzles of a print head in an ink jet printer |
| US6481814B2 (en) * | 2001-02-28 | 2002-11-19 | Lemark International, Inc. | Apparatus and method for ink jet printhead voltage fault protection |
| CN1322382C (en) * | 2002-07-15 | 2007-06-20 | 三星电子株式会社 | Device for controlling printing machine power supply and its method |
| CN102371763A (en) * | 2010-08-10 | 2012-03-14 | 北京美科艺数码科技发展有限公司 | Anti-spray head reverse voltage serial circuit |
| CN102377161A (en) * | 2010-08-18 | 2012-03-14 | 北京美科艺数码科技发展有限公司 | Piezoelectric nozzle protection circuit |
| CN202275293U (en) * | 2011-09-21 | 2012-06-13 | 重庆地质仪器厂 | Shutdown control circuit and transient emission system having same |
| CN203496469U (en) * | 2013-09-30 | 2014-03-26 | 北京美科艺数码科技发展有限公司 | Ink-jet printing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085189A (en) * | 2014-07-08 | 2014-10-08 | 北京美科艺数码科技发展有限公司 | Heating protective circuit |
| CN104085193A (en) * | 2014-07-08 | 2014-10-08 | 北京美科艺数码科技发展有限公司 | Spraying head protective circuit and spraying head control panel |
| CN104085193B (en) * | 2014-07-08 | 2016-07-06 | 北京美科艺数码科技发展有限公司 | Shower nozzle protection circuit and nozzle control panel |
| CN104085189B (en) * | 2014-07-08 | 2016-09-14 | 北京美科艺数码科技发展有限公司 | heating protection circuit |
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| CN103448391B (en) | 2016-03-30 |
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