CN103448391B - A kind of inkjet-printing device - Google Patents
A kind of inkjet-printing device Download PDFInfo
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- CN103448391B CN103448391B CN201310457757.9A CN201310457757A CN103448391B CN 103448391 B CN103448391 B CN 103448391B CN 201310457757 A CN201310457757 A CN 201310457757A CN 103448391 B CN103448391 B CN 103448391B
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Abstract
The present invention discloses 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, a Bye-byes circuit is provided with between described supply voltage and described Switching Power Supply, described Bye-byes circuit comprises signal provides part and power supply conversion portion, before shutdown, master board controls the drive singal that nozzle control panel first cuts off shower nozzle, cut off the logical signal of shower nozzle again, part one off signal is provided to the signal of Bye-byes circuit finally by master board, cut-out supply voltage is powered to Switching Power Supply and is realized shutdown, thus reach the effect of protection shower nozzle.
Description
Technical field
The present invention relates to a kind of inkjet-printing device, relate to a kind of inkjet-printing device with Bye-byes function specifically.
Background technology
Inkjet printing is sprayed on ink droplet to print media by shower nozzle and forms required printed drawings picture.Be divided into minute-pressure electric-type shower nozzle and hot bubble type to spray first two according to the ink-jet principle of shower nozzle, easily there is chemical change due to ink in hot bubble type shower nozzle under 350-400 DEG C of high temperature, and character is unstable, and the real colour got can by impact to a certain extent; On the other hand because ink is sprayed by bubble, directionality and the volume size of ink particles are not easily grasped, and print line edge easily uneven, have impact on print quality to a certain extent; Minute-pressure electric-type shower nozzle is the characteristic of electric discharge when utilizing crystal to pressurize, stable being sprayed by ink under normal temperature state.Comparatively strong to ink droplet control ability, also reduced by color dot many, the ink dot of generation does not have comet tail yet, thus makes the image of printing more clear.Easy realization is up to the high accuracy print quality of 1440dpi, and without the need to heating during micro-piezoelectric ink jet, ink because being heated, chemical change would not occur, therefore greatly reduces the requirement to ink.
Piezoelectric ink jet prints and refers to by applying voltage to piezo-electric crystal, makes it to occur at a high speed and slight distortion, is extruded by the ink in black chamber, realize the printing of image or word from nozzle.When piezo-electric crystal is subject to extraneous pulse voltage effect, piezo-electric crystal produces the volume reducing that distortion causes nozzle ink cavity.Like this, an oil dripping ink just penetrates from nozzle.Then, piezo-electric crystal restores to the original state, and due to surface tension effects, new ink enters nozzle.By the large flow nozzle that is arranged side by side, desirable spray printing width and resolution just can be obtained.Piezoelectric type shower nozzle requires strict powering on and 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 layman in factory, there will be that electric power polarity connects instead, the problem such as high pressure and low pressure is put upside down, overtension, and supply voltage shakiness easily causes the impact to shower nozzle, serious damage shower nozzle.For protection shower nozzle, inkjet-printing device all needs the work and the location status that detect a series of parts before open and close machine, and has needed some necessary operations to come work and the power-up routine of collaborative peripheral circuit.Ensure when power-off operation, first fall high-voltage pulse electric during the power down of shower nozzle, then fall logic circuit electricity.Therefore, when routine use large-format ink-jet printing equipment, be sure not to pull out attaching plug shutdown by force.
Summary of the invention
For prior art Problems existing; the object of the invention is to propose a kind of inkjet-printing device with Bye-byes function; for ensureing the high-voltage pulse electric first falling shower nozzle when shutting down, then falling the logic circuit electricity of shower nozzle, thus reaching 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, a Bye-byes circuit is provided with between described supply voltage and described Switching Power Supply, described Bye-byes circuit comprises signal provides part and power supply conversion portion, described signal providing unit is divided and is comprised input interface JP1, resistance R6, R7, diode D10, photoelectrical coupler O2 and voltage VCC, the off signal that master board exports connects 1 pin of input interface JP1, 1 pin of input interface JP1 connects 1 pin of photoelectrical coupler O2 by resistance R7, 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 R6, 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 is made up of the first electric capacity C1 and the second electric capacity C2, be serially connected on the live wire L of supply voltage after first electric capacity C1 is in parallel with the second electric capacity C2, supply voltage connects by diode D5 after current-limiting circuit, D6, the rectification circuit that D7 and D8 is formed, Zener diode DV1 is met at the two ends of rectification circuit, filter capacitor CT1 is attempted by the two ends of Zener diode DV1, filter capacitor CT1 exports power supply through relay G1 to Switching Power Supply, in the grounded emitter of triode T1, one end of the collector connecting relay G1 coil of triode T1, the voltage VCC of another termination filter capacitor CT1 of relay G1 coil holds.During shutdown, master board controls nozzle control panel and cuts off the drive singal of shower nozzle and the logical signal of shower nozzle successively, then provide part one high level by master board to the signal of Bye-byes circuit, the triode T1 cut-off cut-out supply voltage of power supply conversion portion is powered to Switching Power Supply and is realized shutdown.
Described voltage VCC is the voltage of supply voltage after current limliting, rectification, voltage stabilizing.
Described supply voltage is 220V.
Meet a diode D2 at the two ends of described relay G1 coil.
Described power supply conversion portion also comprises resistance R1 and the light emitting diode D1 at the two ends being attempted by filter capacitor CT1, and resistance R1 is connected in series with light emitting diode D1, another termination voltage VCC of resistance R1.
Relative to prior art; by arranging a Bye-byes circuit between 220V supply voltage and Switching Power Supply, inkjet-printing device of the present invention can ensure that in the power down order of shower nozzle voltage be that first then fall drive singal falls logical signal, thus effectively protect shower nozzle.
Accompanying drawing explanation
Fig. 1 is the shower nozzle control system schematic diagram of inkjet-printing device in prior art;
Fig. 2 is the shower nozzle control system schematic diagram of 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 Bye-byes circuit schematic diagram in the power-offstate in the present invention.
Detailed description of the invention
Describe inkjet-printing device of the present invention below with reference to the accompanying drawings in detail and how to realize Bye-byes.
Fig. 1 is the shower nozzle control system schematic diagram of inkjet-printing device of the prior art, in prior art 220V supply voltage by Switching Power Supply to master board, nozzle control panel and peripheral hardware plate are powered, 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 controls shower nozzle work, when shutting down, direct cutting electromechanical source, is difficult to the power down order ensureing shower nozzle, easily damages shower nozzle.
Fig. 2 is the shower nozzle control system schematic diagram of inkjet-printing device in the present invention, and relative 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.By the power down of Bye-byes circuit realiration shower nozzle order for first to fall high-voltage pulse electric, then fall logic circuit electricity, finally just cutting electromechanical source, thus reach the effect protecting shower nozzle.
Fig. 3 is Bye-byes modular circuit schematic diagram under normal print state, Bye-byes modular circuit of the present invention comprises signal provides part and power supply conversion portion, wherein stimulus part comprises input interface JP1, resistance R6 and R7, diode D10 is, master board output signal meets the input interface JP1 of Bye-byes module, 1 pin of input interface JP1 is connected in series 1 pin of photoelectrical coupler O2 by resistance R7, 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 5V supply voltage by resistance R6, the base stage of triode T1 is also connected in series between 4 pin and resistance R6 of photoelectrical coupler O2.Wherein R1, R6 play metering function, and diode D10 is used for anti-reverse.
Described power supply conversion portion is, is connected on the live wire of 220V alternating supply voltage after the first electric capacity C1 is in parallel with the second electric capacity C2, utilizes electric capacity to the capacitive reactance characteristic of alternating current, carries out current limliting to alternating current, thus forms bleeder circuit.Voltage after current limliting passes through by four diode D5, the full-wave rectifying circuit that D6, D7 and D8 are formed.The effect of rectification circuit converts the voltage AC that ac buck circuit exports to unidirectional pulsating nature direct current.Meet a Zener diode DV1 at the two ends of rectification circuit, after access Zener diode DV1, even if fluctuate due to voltage, or when other reason causes each point variation in voltage in circuit, the voltage at load two ends will remain unchanged substantially.At the two ends of Zener diode DV1 and connect a filter capacitor CT1 in order to reduce AC ripple promote efficient smooth direct current export, making the service behaviour of circuit more stable by arranging filter capacitor, also reducing 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 more than hundreds of microfarad or thousand microfarads.Light emitting diode D1 and resistance R1 are attempted by the two ends of filter condenser CT1 after being connected in series, be connected in series the emitter and collector of triode T1 at the negative pole of filter capacitor CT1 with the negative pole of Light-Emitting Diode D1.The base stage of triode T1 connects 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 contact relay 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 inkjet-printing device normal operating conditions, 1 pin of input interface JP1 is low level, photoelectrical coupler O2 not conducting, now 3 pin of photoelectrical coupler O2 and 4 pin not conductings, the voltage of 4 pin is voltage VCC, now 1 pin of triode T1 is high level, triode T1 conducting, contact 5 and the contact 3 of relay G1 are connected, 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 powered to nozzle control panel, master board and peripheral hardware plate, wherein R1 plays metering function, and diode D10 is used for anti-reverse.
During power-off operation, press power-off 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 the logic circuit electricity of shower nozzle is cut off, 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 ends, contact 5 and the contact 4 of relay G1 are connected, 1 pin and 2 pin of relay output interface JP2 disconnect, thus cut off the electricity of 220V supply voltage to Switching Power Supply, realize complete machine shutdown.
The present invention can effectively ensure first to fall the high-voltage pulse electric of shower nozzle when shutting down by arranging a Bye-byes circuit between supply voltage and Switching Power Supply, then falls the logic circuit electricity of shower nozzle, finally just cutting electromechanical source, thus reaches the effect of protection shower nozzle.
It is to be noted and any distortion done according to the specific embodiment of the present invention all do not depart from the scope of spirit of the present invention and claim record.
Claims (6)
1. an inkjet-printing device, comprise Switching Power Supply, master board and nozzle control panel, 220V supply voltage is powered to master board and nozzle control panel through Switching Power Supply, it is characterized in that, a Bye-byes circuit is provided with between described 220V supply voltage and described Switching Power Supply, described Bye-byes circuit comprises signal provides part and power supply conversion portion, before shutdown, master board controls the drive singal that nozzle control panel first cuts off shower nozzle, cut off the logical signal of shower nozzle again, part one off signal is provided to the signal of Bye-byes circuit finally by master board, cut-out 220V supply voltage is powered to Switching Power Supply and is realized shutdown, described signal providing unit is divided and is comprised input interface (JP1), two resistance (R6, R7), diode (D10) and photoelectrical coupler (O2), the off signal that master board exports connects 1 pin of input interface (JP1), 1 pin of input interface (JP1) connects 1 pin of photoelectrical coupler (O2) by a resistance (R7) in described two resistance, 3 pin of input interface connect 2 pin of photoelectrical coupler (O2) by diode (D10).
2. inkjet-printing device as claimed in claim 1, it is characterized in that, described signal provides 3 pin ground connection of photoelectrical coupler in part (O2), 4 pin of photoelectrical coupler (O2) meet voltage VCC by another resistance (R6) in described two resistance, described voltage VCC is 5V supply voltage, 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 is made up of the first electric capacity (C1) and the second electric capacity (C2), be serially connected in after first electric capacity (C1) is in parallel with the second electric capacity (C2) on the live wire (L) of supply voltage, supply voltage connects by four diode (D5 after current-limiting circuit dividing potential drop, D6, D7, D8) rectification circuit formed, Zener diode (DV1) is connect at the two ends of rectification circuit, filter capacitor (CT1) is attempted by the two ends of Zener diode (DV1), filter capacitor (CT1) exports power supply through relay (G1) to Switching Power Supply, in the grounded emitter of triode (T1), one end of collector connecting relay (G1) coil of triode (T1), the voltage VCC of another termination filter capacitor (CT1) of relay (G1) coil holds.
4. inkjet-printing device as claimed in claim 2, it is characterized in that, described voltage VCC is the voltage of supply voltage after current limliting, rectification, voltage stabilizing.
5. inkjet-printing device as claimed in claim 3, is characterized in that, at the two ends of described relay (G1) coil in addition and connect a diode (D2).
6. inkjet-printing device as claimed in claim 3, it is characterized in that, described power supply conversion portion also comprises resistance (R1) and the light emitting diode (D1) at the two ends being attempted by filter capacitor (CT1).
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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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| Application Number | Priority Date | Filing Date | Title |
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| CN201310457757.9A CN103448391B (en) | 2013-09-30 | 2013-09-30 | A kind of inkjet-printing device |
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| CN103448391A CN103448391A (en) | 2013-12-18 |
| CN103448391B true 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
-
2013
- 2013-09-30 CN CN201310457757.9A patent/CN103448391B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN103448391A (en) | 2013-12-18 |
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