CN102371763A - Anti-spray head reverse voltage serial circuit - Google Patents
Anti-spray head reverse voltage serial circuit Download PDFInfo
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- CN102371763A CN102371763A CN2010102493984A CN201010249398A CN102371763A CN 102371763 A CN102371763 A CN 102371763A CN 2010102493984 A CN2010102493984 A CN 2010102493984A CN 201010249398 A CN201010249398 A CN 201010249398A CN 102371763 A CN102371763 A CN 102371763A
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- shower nozzle
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Abstract
The invention discloses an anti-spray head reverse voltage serial circuit which is arranged on a spray head control board; and the spray head control board comprises a processing unit, a signal generator and a voltage control circuit. The anti-spray head reverse voltage serial circuit is characterized in that the anti-spray head reverse voltage serial circuit is arranged between the power supply end of the spray head control board and the voltage control circuit and mainly comprises a comparator IC101, a bistable-state trigger IC102, triodes T102, T103 and T104, an MOS (Metal Oxide Semiconductor) tube T101 and a plurality of resistors, wherein the MOS tube T101 is a power supply switch; and when the low voltage logic power supply end of a spray head is not within the normal working range, the MOS tube T101 is cut off. The anti-spray head reverse voltage serial circuit can effectively prevent the rise of the low voltage logic power supply voltage of the spray head caused by ink, iron chippings and the like splashing on the spray head in the inkjet printing process to result in the serial burning of all spray heads generated by the burnout of one spray head.
Description
Technical field
The present invention relates to a kind of anti-shower nozzle voltage circuit of playing a reversed role, relate to a kind of anti-shower nozzle voltage that on the inkjet printer head control panel, is provided with circuit of playing a reversed role specifically for anti-shower nozzle skewered.
Background technology
Piezoelectric ink jet is printed and is meant through applying voltage to piezo-electric crystal, makes it to take place at a high speed and slight distortion, and the printing ink in the black chamber is extruded from nozzle, realizes the printing of image or literal.Shower nozzle has three feeder ears; Be respectively high pressure logic feeder ear Vh (24V); Low voltage logic feeder ear Vcc (5V) and analog switch driving voltage end Vcom (20V); The low voltage logic feeder ear voltage of shower nozzle operate as normal will cause shower nozzle to burn out after the low voltage logic supply voltage exceeds this scope in ± 10%Vcc scope.In the ink jet printing process, ink, iron filings etc. splashes to and causes short circuit between low voltage logic feeder ear and high pressure logical drive end or the analog switch driving voltage end on the shower nozzle, and low voltage logic feeder ear voltage raises, and shower nozzle burns out and causes all shower nozzles to burn out.The ink-jet printer of commercial Application is general to adopt a plurality of shower nozzles to print simultaneously with the raising print speed, and the price of shower nozzle is extremely expensive, and the price of general ink-jet printer upper nozzle accounts for about 1/3rd of price of complete machine.Therefore voltage need be set on the shower nozzle control panel play a reversed role that circuit prevents because single shower nozzle burns out and causes all shower nozzle skewereds.
Summary of the invention
Problem to the prior art existence; The objective of the invention is to propose a kind of anti-shower nozzle voltage circuit of playing a reversed role; To prevent in ink jet printing process; Cause on shower nozzle or the shower nozzle control panel that the rising of shower nozzle low voltage logic driving voltage causes single shower nozzle to burn out and causes all shower nozzle skewereds because ink, iron filings etc. splash to, the while can prevent also that in some cases single shower nozzle from burning out.
Be to realize that above-mentioned purpose, the present invention propose a kind of anti-shower nozzle voltage circuit of playing a reversed role, this anti-shower nozzle voltage circuit of playing a reversed role is arranged on the shower nozzle control panel; The shower nozzle control panel comprises processing unit, signal generator and voltage control circuit, it is characterized in that: the said anti-shower nozzle voltage circuit of playing a reversed role is arranged between shower nozzle control panel power supply end and the voltage control circuit, and the said anti-shower nozzle voltage circuit of playing a reversed role mainly comprises comparator IC101; Flip and flop generator IC102, triode T102, T103, T104, metal-oxide-semiconductor T101 and a plurality of resistance; Shower nozzle low voltage logic feeder ear through comparator IC101 and reference voltage relatively after; Input flip and flop generator IC102, metal-oxide-semiconductor T101 is as power switch, when shower nozzle low voltage logic feeder ear is not in normal range of operation; Flip and flop generator IC102 is triggered, and metal-oxide-semiconductor T101 ends.
Further, the negative input end of said shower nozzle low voltage logic power supply termination comparator IC101, the positive input termination 5.5V reference voltage of comparator IC101; Also be connected in series a diode D102 between the positive input terminal of comparator IC101 and the negative input end, the base stage of the output termination triode T103 of comparator IC101, triode T103 emitter stage connects the 12V reference voltage; Colelctor electrode connects 6 pin of flip and flop generator IC102, and through resistance R 6 ground connection, 2 pin of flip and flop generator IC102 connect the colelctor electrode of triode T102; The grounded emitter of triode T102, base stage is connected with software control end, and 4 pin of flip and flop generator IC102 connect the 12V reference voltage; 3 pin connect the base stage of triode T104; Its grounded emitter, colelctor electrode connect the grid of metal-oxide-semiconductor T101, and the source electrode of metal-oxide-semiconductor T101 connects the 35V power supply; Drain electrode connects output voltage, is connected in series a resistance R 9 between the grid of metal-oxide-semiconductor T101 and the source electrode; When shower nozzle low voltage logic feeder ear was not in normal range of operation, metal-oxide-semiconductor T101 ended, thereby preventing effectively that the shower nozzle supply voltage is too high causes a shower nozzle to burn out causing all shower nozzle skewereds.
Further, the said anti-shower nozzle voltage circuit of playing a reversed role also comprises the Transient Suppression Diode D105 of comparator IC101 negative input end serial connection, the end ground connection of Transient Suppression Diode D105; When shower nozzle low voltage logic feeder ear overtension, Transient Suppression Diode D105 conducting ground connection, thus shower nozzle low voltage logic feeder ear voltage is dragged down; Because the response time of Transient Suppression Diode D105 is relevant with power, when load was big, its response speed was big; Can play preventing that overtension from burning out the effect of shower nozzle, when load hour because its response speed is slow; In the time of may appearing at Transient Suppression Diode D105 conducting, shower nozzle burns out.Owing to the play a reversed role existence of circuit of aforementioned anti-voltage is arranged, a shower nozzle can not occur and damage the phenomenon that causes all shower nozzle skewereds.
Further, the breakdown voltage of said Transient Suppression Diode D105 is 6.5V.
Further, said metal-oxide-semiconductor is the P-MOS pipe.
The present invention is through being provided with the anti-shower nozzle voltage circuit of playing a reversed role on the shower nozzle control panel; Prevent effectively to cause on the shower nozzle that owing to ink, iron filings etc. splash in shower nozzle low voltage logic supply voltage raises, and causes a shower nozzle to burn out and causes all shower nozzle skewereds in the ink jet printing process; The present invention simultaneously also suppresses diode ground connection in the low voltage logic power supply termination attitude at a flash of shower nozzle, when load is big, can play the effect that prevents that shower nozzle from burning out.
Description of drawings
Voltage input state sketch map when Fig. 1 is the shower nozzle operate as normal;
Voltage input state sketch map when Fig. 2 A is the shower nozzle non-normal working;
Another voltage input state sketch map when Fig. 2 B is the shower nozzle non-normal working;
Fig. 3 is the voltage of a specific embodiment of the present invention circuit theory diagrams of playing a reversed role.
The specific embodiment
The supply voltage input state sketch map of shower nozzle comprised high pressure logic feeder ear Vh (24V) when Fig. 1 was the shower nozzle operate as normal, low voltage logic feeder ear Vcc (5V) and analog switch driving voltage end Vcom (20V).
Fig. 2 A and Fig. 2 B are in the ink jet printing process; Because ink, iron filings etc. splash on shower nozzle or the shower nozzle control panel; The supply voltage input state sketch map of shower nozzle when causing shower nozzle low voltage logic feeder ear Vcc and high pressure logic feeder ear Vh or analog switch driving voltage end Vcom short circuit; At this moment; Be equivalent between the low voltage logic feeder ear Vcc of shower nozzle and high pressure logic feeder ear Vh or the analog switch driving voltage Vcom couple together through a small resistance R02 or R01, this moment, shower nozzle low voltage logic feeder ear voltage vcc was near high pressure logic feeder ear voltage Vh or analog switch driving voltage Vcom, i.e. Vcc ≈ Vh=24V; Perhaps Vcc ≈ Vcom=20V, shower nozzle is burnt out.
Fig. 3 is the play a reversed role schematic diagram of circuit of anti-shower nozzle voltage on the shower nozzle control panel in the one embodiment of the invention; The anti-shower nozzle voltage comparator IC101 of circuit that play a reversed role with open collector output; Flip and flop generator IC102 is that core constitutes; Metal-oxide-semiconductor T101 is as power switch, and it is the P-MOS pipe that comparator IC101 adopts LM393, flip and flop generator IC102 to adopt LM555, metal-oxide-semiconductor.
The positive input terminal 3 of comparator IC101 meets the low voltage logic feeder ear Vcc that 5.5V reference voltage, negative input end 2 connect shower nozzle, also is connected in series a diode D102 between its positive input terminal and the negative input end, and the output 1 of comparator IC101 is connected with the base stage 1 of triode T103 through serial connection one resistance R 4 backs; The emitter stage 3 of triode T103 connects the 12V power supply; Colelctor electrode 2 is connected with 6 pin of flip and flop generator IC102, and through resistance R 6 ground connection, 2 pin of flip and flop generator IC102 are connected with the colelctor electrode 2 of triode T102; Emitter stage 3 ground connection of triode T102; Base stage 1 connects software control end, and 4 pin of flip and flop generator IC102 connect the 12V power supply through resistance R 5, and 3 pin of flip and flop generator IC102 are connected with the base stage 1 of triode T104 through resistance R 8; Emitter stage 3 ground connection of triode T104; Colelctor electrode 2 is connected with the grid 1 of metal-oxide-semiconductor T101 through resistance R 10, and the source electrode 3 of metal-oxide-semiconductor T101 meets power supply 35V through diode D101, and the drain electrode 2 of metal-oxide-semiconductor T101 connects output voltage and partly supplies power to shower nozzle control panel boost control circuit; Between the grid 1 of metal-oxide-semiconductor T101 and source electrode 3, also be connected in series a resistance R 9; Also be connected in series a light emitting diode D104 between the drain electrode 2 of metal-oxide-semiconductor T101 and the ground, be used to point out shower nozzle feeder ear terminal voltage whether normal, when shower nozzle feeder ear voltage is in normal range of operation; Light emitting diode D104 lamp is bright, otherwise then lamp goes out.
The negative input end of comparator IC101 also is connected in series a Transient Suppression Diode D105, the other end ground connection of Transient Suppression Diode D105, and the breakdown voltage of Transient Suppression Diode D105 is 6.5V.
During start, software control end 35VON gives base stage 1 input one high level of triode T102, and triode T102 is in saturation state; The colelctor electrode 2 of triode T102 and emitter stage 3 conductings, colelctor electrode 2 ground connection of triode T102 are promptly given the 2 pin input low levels of flip and flop generator IC102; Then its 3 pin is exported high level, and this moment, triode T104 was in saturation state, colelctor electrode 2 and emitter stage 3 conductings of triode T104; Triode T104 colelctor electrode 2 ground connection, after the triode T104 conducting, power supply voltage after resistance R 9 descends; Grid 1 voltage of metal-oxide-semiconductor T101 is less than source electrode 3 voltages, and metal-oxide-semiconductor T101 conducting is when in the normal power supply voltage range of input voltage at the shower nozzle control panel; Light emitting diode D104 lamp is bright, and the 35V power supply is directly to the power supply of shower nozzle control panel, and normal printing is carried out in the work of shower nozzle control panel control shower nozzle.
Because the close between the low voltage logic feeder ear of shower nozzle control panel upper nozzle and the pin of analog switch driving voltage and high pressure logic feeder ear; In ink jet printing process; Ink, iron filings etc. are splashed between the low voltage logic feeder ear and analog switch driving voltage pin or low voltage logic feeder ear and high pressure logic feeder ear pin of shower nozzle control panel upper nozzle, cause short circuit between low voltage logic feeder ear and analog switch driving voltage end or low voltage logic feeder ear and the high pressure logic feeder ear.
When little load objects such as ink splash between shower nozzle low voltage logic feeder ear and high pressure logic feeder ear or the analog switch driving voltage end pin; Because load is less; The response speed of Transient Suppression Diode D105 is slow, and when Transient Suppression Diode D105 conducting, shower nozzle burns out.This moment comparator IC101 negative input end 2 voltages greater than positive input terminal 3 voltages, comparator IC101 output low level, emitter stage 3 and colelctor electrode 2 conductings of triode T103; The 6 pin ground connection of colelctor electrode 2 and flip and flop generator IC102 are low level, and flip and flop generator IC102 is triggered; Its 3 pin output low level; Triode T104 ends, and metal-oxide-semiconductor T101 ends, thereby prevents that single shower nozzle from burning out the phenomenon that causes all shower nozzle skewereds; This moment, light emitting diode D104 lamp went out, short circuit between the expression shower nozzle feeder ear pin.
When heavy load objects such as iron filings splash between low voltage logic feeder ear and high pressure logic feeder ear or the analog switch driving voltage end pin; Because load is bigger; Transient Suppression Diode D105 moment conducting ground connection; In time shower nozzle low voltage logic feeder ear voltage is dragged down, play preventing that overtension from burning out the effect of shower nozzle.Simultaneously since negative input end 2 voltages of comparator IC101 greater than positive input terminal 3 voltages, comparator IC101 output low level, triode T103 conducting; The 6 pin ground connection of flip and flop generator IC102 are low level, and flip and flop generator IC102 is triggered; Its 3 pin output low level, triode T104 ends, and metal-oxide-semiconductor T101 ends; Light emitting diode D104 lamp goes out; Operating personnel clear up the impurity between each feeder ear pin of shower nozzle, and behind the shower nozzle that more renews, the shower nozzle control panel could start and carry out normal printing work.
The present invention is through being provided with the anti-shower nozzle voltage circuit of playing a reversed role on the shower nozzle control panel, prevent effectively in the ink jet printing process to cause on the shower nozzle that shower nozzle logic supply voltage raises, and causes a shower nozzle to burn out and causes all shower nozzle skewereds because ink, iron filings etc. splash in; The present invention simultaneously also suppresses diode ground connection in the low voltage logic power supply termination attitude at a flash of shower nozzle, when load is big between shower nozzle low voltage logic feeder ear and other pin, can play the effect that prevents that shower nozzle from burning out.
It is to be noted and any distortion of making 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 (5)
1. anti-shower nozzle voltage circuit of playing a reversed role, this anti-shower nozzle voltage circuit of playing a reversed role is arranged on the shower nozzle control panel, and the shower nozzle control panel comprises processing unit, signal generator and voltage control circuit; It is characterized in that: the said anti-shower nozzle voltage circuit of playing a reversed role is arranged between shower nozzle control panel power supply end and the voltage control circuit, and the said anti-shower nozzle voltage circuit of playing a reversed role mainly comprises comparator IC101, flip and flop generator IC102; Triode T102, T103, T104; Metal-oxide-semiconductor T101 and a plurality of resistance, shower nozzle low voltage logic feeder ear through comparator IC101 and reference voltage relatively after, import flip and flop generator IC102; Metal-oxide-semiconductor T101 is as power switch; When shower nozzle low voltage logic feeder ear was not in normal range of operation, flip and flop generator IC102 was triggered, and metal-oxide-semiconductor T101 ends.
2. the anti-shower nozzle voltage as claimed in claim 1 circuit of playing a reversed role is characterized in that: the negative input end of said shower nozzle low voltage logic power supply termination comparator IC101, the positive input termination reference voltage of comparator IC101; The positive input terminal of comparator IC101 directly also is connected in series a diode D102 with negative input end, the base stage of the output termination triode T103 of comparator IC101, and the emitter stage of triode T103 connects the 5.5V reference voltage; Colelctor electrode connects 6 pin of flip and flop generator IC102, and through resistance R 6 ground connection, 2 pin of flip and flop generator IC102 connect the colelctor electrode of triode T102; The grounded emitter of triode T102, base stage is connected with software control end, and 4 pin of flip and flop generator IC102 connect the 12V reference voltage; 3 pin connect the base stage of triode T104; Its grounded emitter, colelctor electrode connect the grid of metal-oxide-semiconductor T101, and the source electrode of metal-oxide-semiconductor T101 connects the 35V power supply; Drain electrode connects output voltage, is connected in series a resistance R 9 between the grid of metal-oxide-semiconductor T101 and the source electrode; When shower nozzle low voltage logic feeder ear was not in normal range of operation, metal-oxide-semiconductor T101 ended.
3. the anti-shower nozzle voltage as claimed in claim 1 circuit of playing a reversed role is characterized in that: the said anti-shower nozzle voltage circuit of playing a reversed role also comprises the Transient Suppression Diode D105 of comparator IC101 negative input end serial connection, the end ground connection of Transient Suppression Diode D105.
4. the anti-shower nozzle voltage as claimed in claim 3 circuit of playing a reversed role, it is characterized in that: the breakdown voltage of said Transient Suppression Diode D105 is 6.5V.
5. the anti-shower nozzle voltage as claimed in claim 1 circuit of playing a reversed role is characterized in that: said metal-oxide-semiconductor T103 is the P-MOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010249398.4A CN102371763B (en) | 2010-08-10 | 2010-08-10 | Anti-spray head reverse voltage serial circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010249398.4A CN102371763B (en) | 2010-08-10 | 2010-08-10 | Anti-spray head reverse voltage serial circuit |
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| Publication Number | Publication Date |
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| CN102371763A true CN102371763A (en) | 2012-03-14 |
| CN102371763B CN102371763B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010249398.4A Active CN102371763B (en) | 2010-08-10 | 2010-08-10 | Anti-spray head reverse voltage serial circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795001A (en) * | 2012-06-27 | 2012-11-28 | 杭州冲之上数码设备有限公司 | Intelligent power supply applied to ink-jet printer |
| CN103448391A (en) * | 2013-09-30 | 2013-12-18 | 北京美科艺数码科技发展有限公司 | Inkjet printing device |
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| JPS62122761A (en) * | 1985-11-23 | 1987-06-04 | Nec Corp | Piezoelectric printing head drive circuit |
| CN1993226A (en) * | 2004-09-01 | 2007-07-04 | 精工爱普生株式会社 | Printer |
| WO2009020915A1 (en) * | 2007-08-06 | 2009-02-12 | Hewlett-Packard Development Company, L.P. | A nozzle disable system and a method for disabling a single nozzle in a thermal ink-jet print head |
| WO2009142908A1 (en) * | 2008-05-21 | 2009-11-26 | Fujifilm Corporation | Overcurrent detection for droplet ejectors |
| CN201742089U (en) * | 2010-08-10 | 2011-02-09 | 北京美科艺数码科技发展有限公司 | Sprayer voltage inversion resisting circuit |
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2010
- 2010-08-10 CN CN201010249398.4A patent/CN102371763B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62122761A (en) * | 1985-11-23 | 1987-06-04 | Nec Corp | Piezoelectric printing head drive circuit |
| CN1993226A (en) * | 2004-09-01 | 2007-07-04 | 精工爱普生株式会社 | Printer |
| WO2009020915A1 (en) * | 2007-08-06 | 2009-02-12 | Hewlett-Packard Development Company, L.P. | A nozzle disable system and a method for disabling a single nozzle in a thermal ink-jet print head |
| WO2009142908A1 (en) * | 2008-05-21 | 2009-11-26 | Fujifilm Corporation | Overcurrent detection for droplet ejectors |
| CN201742089U (en) * | 2010-08-10 | 2011-02-09 | 北京美科艺数码科技发展有限公司 | Sprayer voltage inversion resisting circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795001A (en) * | 2012-06-27 | 2012-11-28 | 杭州冲之上数码设备有限公司 | Intelligent power supply applied to ink-jet printer |
| CN102795001B (en) * | 2012-06-27 | 2014-09-03 | 杭州冲之上数码设备有限公司 | Intelligent power supply applied to ink-jet printer |
| CN103448391A (en) * | 2013-09-30 | 2013-12-18 | 北京美科艺数码科技发展有限公司 | Inkjet printing device |
| CN103448391B (en) * | 2013-09-30 | 2016-03-30 | 北京美科艺数码科技发展有限公司 | A kind of inkjet-printing device |
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| Publication number | Publication date |
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| CN102371763B (en) | 2015-04-29 |
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Effective date of registration: 20200907 Address after: Room 101, Building 4, No. 5 Qianqian Road, Changping District Science and Technology Park, Beijing 102200 Patentee after: BEIJING KEJIACAI TECHNOLOGY Co.,Ltd. Address before: 100191, Haidian District Garden Road, Beijing, Taixing, building 11, two Patentee before: Beijing Meikeyi Digital Technology Development Co.,Ltd. |