CN102371763B - Anti-spray head reverse voltage serial circuit - Google Patents
Anti-spray head reverse voltage serial circuit Download PDFInfo
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- CN102371763B CN102371763B CN201010249398.4A CN201010249398A CN102371763B CN 102371763 B CN102371763 B CN 102371763B CN 201010249398 A CN201010249398 A CN 201010249398A CN 102371763 B CN102371763 B CN 102371763B
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- serial circuit
- reverse voltage
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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, a first triode T102, a second triode T103 and a third triode 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-spray head reverse voltage serial circuit, relate to a kind of anti-spray head reverse voltage serial circuit arranged for preventing spray head skewered on inkjet printer head control panel specifically.
Background technology
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.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 that shower nozzle normally works within the scope of ± 10%Vcc, when low voltage logic supply voltage is super go beyond the scope after shower nozzle will be caused to burn out.In ink jet printing process, ink, iron filings etc. splash to and shower nozzle cause short circuit between low voltage logic feeder ear and high pressure logical drive end or analog switch driving voltage end, and low voltage logic feeder ear voltage raises, and a shower nozzle burns out and causes all shower nozzles to burn out.The ink-jet printer of commercial Application generally adopts multiple shower nozzle to print to improve print speed simultaneously, 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 need to arrange voltage circuit of playing a reversed role on nozzle control panel to prevent from causing all shower nozzle skewereds because single shower nozzle burns out.
Summary of the invention
For prior art Problems existing, the object of the invention is to propose a kind of anti-spray head reverse voltage serial circuit, to prevent in ink jet printing process, cause all shower nozzle skewereds because ink, iron filings etc. splash to shower nozzle or nozzle control panel to cause shower nozzle low voltage logic driving voltage raise to cause single shower nozzle to burn out, also can prevent single shower nozzle from burning out in some cases simultaneously.
For achieving the above object, the present invention proposes a kind of anti-spray head reverse voltage serial circuit, this anti-spray head reverse voltage serial circuit is arranged on nozzle control panel, nozzle control panel comprises processing unit, signal generator and voltage control circuit, it is characterized in that: described anti-spray head reverse voltage serial circuit is arranged between nozzle control panel power supply end V1 and voltage control circuit, described anti-spray head reverse voltage serial circuit mainly comprises comparator IC101, flip and flop generator IC102, first triode T102, second triode T103, 3rd triode T104, metal-oxide-semiconductor T101 and multiple resistance, described power supply end V1 connects with the source electrode of metal-oxide-semiconductor T101, the negative input end of described comparator IC101 connects with shower nozzle low voltage logic feeder ear Vcc, after described shower nozzle low voltage logic feeder ear is compared with 5.5V reference voltage by comparator IC101, 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, metal-oxide-semiconductor T101 ends.
Further, described shower nozzle low voltage logic is powered the negative input end of termination comparator IC101, the positive input termination 5.5V reference voltage of comparator IC101, the positive input terminal of comparator IC101 be also connected in series a diode D102 between negative input end, the base stage of the output termination second triode T103 of comparator IC101, second triode T103 emitter stage connects 12V reference voltage, colelctor electrode connects 6 pin of flip and flop generator IC102, and by the first resistance R6 ground connection, 2 pin of flip and flop generator IC102 connect the colelctor electrode of the first triode T102, the grounded emitter of the first triode T102, base stage is connected with software control end 35VON, 4 pin of flip and flop generator IC102 connect 12V reference voltage, 3 pin connect the base stage of the 3rd triode T104, its grounded emitter, colelctor electrode connects the grid of metal-oxide-semiconductor T101, the source electrode of metal-oxide-semiconductor T101 meets 35V power supply end V1, drain electrode connects output voltage, the grid of metal-oxide-semiconductor T101 be connected in series one second resistance R9 between source electrode.
Further, described anti-spray head reverse voltage serial circuit also comprises the Transient Suppression Diode D105 of comparator IC101 negative input end serial connection, one 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 is larger, its response speed is large, the effect preventing overtension from burning out shower nozzle can be played, when load is less, because its response speed is slow, when may appear at Transient Suppression Diode D105 conducting, shower nozzle burns out.Owing to there being aforementioned anti-voltage to play a reversed role the existence of circuit, a shower nozzle is there will not be to damage the phenomenon causing all shower nozzle skewereds.
Further, the breakdown voltage of described Transient Suppression Diode D105 is 6.5V.
Further, described metal-oxide-semiconductor T101 is P-MOS pipe.
The present invention by arranging anti-spray head reverse voltage serial circuit on nozzle control panel, effectively prevent from causing shower nozzle low voltage logic supply voltage to raise because ink, iron filings etc. splash on shower nozzle in ink jet printing process, cause a shower nozzle to burn out and cause all shower nozzle skewereds; Simultaneously the present invention also to power termination state at a flash twin zener dioder ground connection at the low voltage logic of shower nozzle, when load is larger, can play the effect preventing shower nozzle from burning out.
Accompanying drawing explanation
Fig. 1 is the voltage input state schematic diagram of shower nozzle when normally working;
Voltage input state schematic diagram when Fig. 2 A is shower nozzle non-normal working;
Another voltage input state schematic diagram when Fig. 2 B is shower nozzle non-normal working;
Fig. 3 is that the voltage of the present invention's specific embodiment is played a reversed role circuit theory diagrams.
Detailed description of the invention
Fig. 1 is the supply voltage input state schematic diagram of shower nozzle shower nozzle when normally working, and comprises high pressure logic feeder ear Vh (24V), low voltage logic feeder ear Vcc (5V) and analog switch driving voltage end Vcom (20V).
Fig. 2 A and Fig. 2 B is in ink jet printing process, due to ink, iron filings etc. splash on shower nozzle or nozzle control panel, cause the supply voltage input state schematic diagram of shower nozzle when shower nozzle low voltage logic feeder ear Vcc and high pressure logic feeder ear Vh or the Vcom short circuit of analog switch driving voltage end, now, be equivalent between the low voltage logic feeder ear Vcc of shower nozzle and high pressure logic feeder ear Vh or analog switch driving voltage Vcom be coupled together by a Minitype resistance R02 or R01, now shower nozzle low voltage logic feeder ear voltage vcc is close to high pressure logic feeder ear voltage Vh or analog switch driving voltage Vcom, i.e. Vcc ≈ Vh=24V, or Vcc ≈ Vcom=20V, shower nozzle is burned.
Fig. 3 is the schematic diagram of anti-spray head reverse voltage serial circuit on nozzle control panel in one embodiment of the invention, the comparator IC101 that anti-spray head reverse voltage serial circuit exports with open collector, flip and flop generator IC102 is that core is formed, metal-oxide-semiconductor T101 is as power switch, and comparator IC101 adopts LM393, flip and flop generator IC102 to adopt LM555, metal-oxide-semiconductor T101 to be P-MOS pipe.
The positive input terminal 3 of comparator IC101 connects 5.5V reference voltage, negative input end 2 meets the low voltage logic feeder ear Vcc of shower nozzle, a diode D102 is also connected in series between its positive input terminal with negative input end, the output 1 of comparator IC101 is by being connected with the base stage 1 of the second triode T103 after serial connection 1 the 3rd resistance R4, the emitter stage 3 of the second triode T103 connects 12V reference voltage, colelctor electrode 2 is connected with 6 pin of flip and flop generator IC102, and by the first resistance R6 ground connection, 2 pin of flip and flop generator IC102 are connected with the colelctor electrode 2 of the first triode T102, emitter stage 3 ground connection of the first triode T102, base stage 1 meets software control end 35VON, 4 pin of flip and flop generator IC102 connect 12V reference voltage by the 4th resistance R5, 3 pin of flip and flop generator IC102 are connected with the base stage 1 of the 3rd triode T104 by the 5th resistance R8, emitter stage 3 ground connection of the 3rd triode T104, colelctor electrode 2 is connected with the grid 1 of metal-oxide-semiconductor T101 by the 6th resistance R10, the source electrode 3 of metal-oxide-semiconductor T101 meets 35V power supply end V1 by diode D101, the drain electrode 2 of metal-oxide-semiconductor T101 connects output voltage to nozzle control panel boost control circuit energize portions, metal-oxide-semiconductor T101 grid 1 be also connected in series one second resistance R9 between source electrode 3, a light emitting diode D104 is also connected in series between the drain electrode 2 of metal-oxide-semiconductor T101 and ground, for pointing out shower nozzle feeder ear 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 is also 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 inputs a high level to the base stage 1 of the first triode T102, first triode T102 is in saturation state, colelctor electrode 2 and emitter stage 3 conducting of the first triode T102, colelctor electrode 2 ground connection of the first triode T102, namely the 2 pin input low levels of flip and flop generator IC102 are given, then its 3 pin exports high level, now the 3rd triode T104 is in saturation state, colelctor electrode 2 and emitter stage 3 conducting of the 3rd triode T104, 3rd triode T104 emitter stage 3 ground connection, after 3rd triode T104 conducting, power supply is voltage drop after the second resistance R9, grid 1 voltage of metal-oxide-semiconductor T101 is less than source electrode 3 voltage, metal-oxide-semiconductor T101 conducting, when input voltage is in the normal power supply voltage range of nozzle control panel, light emitting diode D104 lamp is bright, 35V power supply is powered directly to nozzle control panel, nozzle control panel controls shower nozzle work and carries out normal print.
Due to the pin of the low voltage logic feeder ear Vcc of nozzle control panel upper nozzle and the distance between the pin of analog switch driving voltage end Vcom and the pin of high pressure logic feeder ear Vh very near, in ink jet printing process, ink, iron filings etc. are splashed between the pin of the low voltage logic feeder ear Vcc of nozzle control panel upper nozzle and the pin of the pin of analog switch driving voltage end Vcom or the pin of low voltage logic feeder ear Vcc and high pressure logic feeder ear Vh, cause short circuit between the pin of low voltage logic feeder ear Vcc and the pin of the pin of analog switch driving voltage end Vcom or the pin of low voltage logic feeder ear Vcc and high pressure logic feeder ear Vh.
Time between the pin that the little load objects such as ink splash to the pin of shower nozzle low voltage logic feeder ear Vcc and the pin of high pressure logic feeder ear Vh or analog switch driving voltage end Vcom, because load is less, the response speed of Transient Suppression Diode D105 is slow, when Transient Suppression Diode D105 conducting, shower nozzle burns out.Now negative input end 2 voltage of comparator IC101 is greater than positive input terminal 3 voltage, comparator IC101 output low level, emitter stage 3 and colelctor electrode 2 conducting of the second triode T103, the 6 pin ground connection of colelctor electrode 2 and flip and flop generator IC102, for low level, flip and flop generator IC102 is triggered, its 3 pin output low level, 3rd triode T104 ends, metal-oxide-semiconductor T101 ends, thus prevent single shower nozzle from burning out the phenomenon causing all shower nozzle skewereds, now light emitting diode D104 lamp goes out, and represents short circuit between shower nozzle feeder ear pin.
Time between the pin that the heavy load objects such as iron filings splash to the pin of low voltage logic feeder ear Vcc and the pin of high pressure logic feeder ear Vh or analog switch driving voltage end Vcom, because load is larger, Transient Suppression Diode D105 transient switching ground connection, in time the voltage of shower nozzle low voltage logic feeder ear Vcc is dragged down, play the effect preventing overtension from burning out shower nozzle.Simultaneously because negative input end 2 voltage of comparator IC101 is greater than positive input terminal 3 voltage, comparator IC101 output low level, second triode T103 conducting, the 6 pin ground connection of flip and flop generator IC102, for low level, flip and flop generator IC102 is triggered, its 3 pin output low level, 3rd triode T104 ends, metal-oxide-semiconductor T101 ends, and light emitting diode D104 lamp goes out, and operating personnel clear up the impurity between each feeder ear pin of shower nozzle, after the shower nozzle more renewed, nozzle control panel could start and carry out normal print work.
The present invention, by arranging anti-spray head reverse voltage serial circuit on nozzle control panel, effectively prevents from causing shower nozzle logic supply voltage to raise because ink, iron filings etc. splash on shower nozzle in ink jet printing process, causes a shower nozzle to burn out and cause all shower nozzle skewereds; Simultaneously the present invention also to power termination state at a flash twin zener dioder ground connection at the low voltage logic of shower nozzle, when load is larger between shower nozzle low voltage logic feeder ear and other pin, can play the effect preventing shower nozzle from burning out.
It is to be noted and any distortion made 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 (5)
1. an anti-spray head reverse voltage serial circuit, this anti-spray head reverse voltage serial circuit is arranged on nozzle control panel, nozzle control panel comprises processing unit, signal generator and voltage control circuit, it is characterized in that: described anti-spray head reverse voltage serial circuit is arranged between nozzle control panel power supply (V1) end and voltage control circuit, described anti-spray head reverse voltage serial circuit comprises comparator (IC101), flip and flop generator (IC102), first triode (T102), second triode (T103), 3rd triode (T104), metal-oxide-semiconductor (T101) and multiple resistance, after shower nozzle low voltage logic feeder ear is compared with 5.5V reference voltage by comparator (IC101), 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, metal-oxide-semiconductor (T101) ends.
2. anti-spray head reverse voltage serial circuit as claimed in claim 1, it is characterized in that: the positive input termination 5.5V reference voltage of described comparator (IC101), the positive input terminal of comparator (IC101) is directly also connected in series a diode (D102) with negative input end, the base stage of output termination second triode (T103) of comparator IC101, the emitter stage of the second triode (T103) connects 5.5V reference voltage, colelctor electrode connects 6 pin of flip and flop generator (IC102), and by the first resistance (R6) ground connection, 2 pin of flip and flop generator (IC102) connect the colelctor electrode of the first triode (T102), the grounded emitter of the first triode (T102), base stage is connected with software control end (35VON), 4 pin of flip and flop generator (IC102) connect 12V reference voltage, 3 pin connect the base stage of the 3rd triode (T104), the grounded emitter of the 3rd triode (T104), colelctor electrode connects the grid of metal-oxide-semiconductor (T101), the source electrode of metal-oxide-semiconductor (T101) connects 35V power supply end (V1), drain electrode connects output voltage, the grid of metal-oxide-semiconductor (T101) be connected in series one second resistance (R9) between source electrode, when shower nozzle low voltage logic feeder ear is not in normal range of operation, metal-oxide-semiconductor (T101) ends.
3. anti-spray head reverse voltage serial circuit as claimed in claim 1, it is characterized in that: described anti-spray head reverse voltage serial circuit also comprises the Transient Suppression Diode (D105) of comparator (IC101) negative input end serial connection, one end ground connection of Transient Suppression Diode (D105).
4. anti-spray head reverse voltage serial circuit as claimed in claim 3, is characterized in that: the breakdown voltage of described Transient Suppression Diode (D105) is 6.5V.
5. anti-spray head reverse voltage serial circuit as claimed in claim 1, is characterized in that: described metal-oxide-semiconductor (T101) is 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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| CN102371763A CN102371763A (en) | 2012-03-14 |
| CN102371763B true CN102371763B (en) | 2015-04-29 |
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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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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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| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62122761A (en) * | 1985-11-23 | 1987-06-04 | Nec Corp | Piezoelectric printing head drive circuit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN102371763A (en) | 2012-03-14 |
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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. |
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