CN1637660A - Powdered ink grade sensor - Google Patents
Powdered ink grade sensor Download PDFInfo
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- CN1637660A CN1637660A CNA200410029637XA CN200410029637A CN1637660A CN 1637660 A CN1637660 A CN 1637660A CN A200410029637X A CNA200410029637X A CN A200410029637XA CN 200410029637 A CN200410029637 A CN 200410029637A CN 1637660 A CN1637660 A CN 1637660A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
- G03G15/0856—Detection or control means for the developer level
- G03G15/086—Detection or control means for the developer level the level being measured by electro-magnetic means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
- G03G15/0856—Detection or control means for the developer level
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0887—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity
- G03G15/0889—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity for agitation or stirring
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/06—Developing structures, details
- G03G2215/0634—Developing device
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- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Dry Development In Electrophotography (AREA)
- Ink Jet (AREA)
Abstract
A powdered ink grade sensor capable of accurately detecting grades of powdered ink consists of the following units: a piezoelectric oscillation sensor (10) comprising a metal vibrating plate (C), a piezo-electricity disk (D) and a feeding-back terminal (F) and locating at a preceptive position inside a ink powder box (2), which is used for outputting a first signal (S1) from the feeding-back terminal (F) when the amount of powdered ink inside the ink powder box (2) does not reach the standard grade (LV) and an electrical current is applied to the piezo-electricity disk (D); an oscillation control unit (20) used for receiving the first signal, outputting a second signal from the feeding-back terminal mentioned above when said first signal current is not applied to the piezo-electricity disk, outputting the first signal from the feeding-back terminal mentioned above upon galvanization in the second signal piezo-electricity disk, and then outputting oscillation signals between the fist signal and the second signal with a finite period form the feeding-back terminal of the piezoelectric vibration sensor mentioned above; a filtering unit (30) used for filtering the oscillation signal (OSC) and outputting direct current signals (DC); a delay unit (40) used for outputting effective delayed signals (DL) when the direct current signals (DC) are kept unchanged in a standard time period and continuously kept as effective values and outputting uneffective delayed signals (DL) when the direct current signals (DC) are changeable in a standard time period or invalid; and a detection unit (50) used for detecting that the amount of powdered ink in the powdered ink box doesn't reach the standard grade when the delayed signal is effective and outputting effective output signals (OUT).
Description
Technical field
The present invention relates to the ink powder level sensor, especially detect as uses amount of toner in the powder box of image formation unit in the office unit such as duplicating machine, printer or fax of ink powder printed images and detection amount of toner whether as below the levels of the standard and the ink powder level sensor of informing the user.
Background technology
Thereby the view data that duplicating machine or laser printer will need to print is transmitted into and forms sub-image on the photoreceptor and partly be stained with ink powder by the developing device sub-image.When paper between thrower and charger (charger) by the time be stained with ink powder, thereby and by fixedly printing operation is finished in ink roller heating and pressurization.Ink powder is as consumptive material, and is essential for the sensor of duplicating machine or laser printing machine testing amount of toner.
Past is detected with piezoelectric sensor or light sensors amount of toner by installation ink powder in the powder box or counts the printing paper number and detect amount of toner.
Piezoelectric sensor has for example detected ink powder thereby rely on the load of ink powder to make in the piezoelectric sensor drift decide electric current when amount of toner is sufficient, thereby does not work and then the electric current disconnection detects and do not have ink powder if amount of toner is below the mark then piezoelectric sensor.In addition, luminescence unit that will be made of optical sensor and light receiving unit are installed to the assigned position in the powder box, thereby light receiving unit can not detect light light receiving unit no power by the luminescence unit emission when amount of toner is sufficient; If there is not ink powder, thereby then the light receiving unit light and the galvanization that can detect luminescence unit detects the amount of toner deficiency.
Amount of toner detecting sensor for the above-mentioned past, thereby long-time inoperatively under the situation of powder box cause the ink powder in the powder box to solidify and can not ink powder is provided reposefully and hinder the image printing quality to toner cartridge in order to prevent to load onto because of duplicating machine or printer, the power when the ink powder stirring machine being installed in powder box making it utilize duplicating machine or printer activation mixes ink powder smoothly.At this moment, though the amount of toner abundance, thus but, can not correctly detect amount of toner because of not considering that fully to detect amount of toner not enough and then cause the waste of ink powder along with the mobile amount of toner of the rotation of mixing wing.
Summary of the invention
For achieving the above object, ink powder level sensor of the present invention is made up of following unit:
Piezoelectric vibration sensor (10): have metal vibration plate (C), piezoceramic disk (D) and feedback end (F), and be positioned at the assigned position of powder box (2).When the amount of toner in the powder box (2) does not reach levels of the standard (LV) and when powering up when flowing to piezoceramic disk (D), by feedback end (F) output the 1st signal (S1);
Oscillation control unit (20): accept the 1st signal, then above-mentioned feedback end will not exported the 2nd signal when adding piezoceramic disk because of above-mentioned the 1st marking current, above-mentioned feedback end is then exported the 1st signal during galvanization in because of above-mentioned the 2nd signal pressure electroplax, thereby the feedback end output that makes above-mentioned piezoelectric vibration sensor is with the oscillator signal of some cycles by the 1st signal to the 2 signal oscillatings;
Filter unit (30): oscillator signal (OSC) is carried out exporting direct current signal (DC) after the filtering;
Delay cell (40): if direct current signal (DC) remains unchanged and continues to remain effective value in the standard time section and then exports effective inhibit signal (DL), if direct current signal (DC) is invalid or then export invalid inhibit signal (DL) when standard time section direct current signal (DC) is variable signal;
Detecting unit (50): do not reach levels of the standard and export effective output signal (OUT) if inhibit signal effectively then detects the amount of toner of above-mentioned powder box.
Above-mentioned delay cell is made up of following parts: terminal is connected to the 5th resistance that direct current signal, another terminal are connected to inhibit signal; Terminal is connected to the 2nd capacitor that inhibit signal, another terminal are connected to above-mentioned the 2nd service voltage; And terminal is connected to the 6th resistance that inhibit signal, another terminal are connected to above-mentioned the 2nd service voltage.
Above-mentioned detecting unit is made up of following parts: terminal is connected to the resistance that lifts that the 1st service voltage, another terminal are connected to output signal output; Accept the output delay signal and the normal voltage of delay cell, if inhibit signal overgauge voltage is then exported the comparing unit of effective comparison signal; And have cardinal extremity, emitter terminals and collector terminal and cardinal extremity and be connected to comparison signal, collector terminal and be connected to and lift the 2nd transistor that another terminal of resistance, emitter terminals are connected to the 2nd service voltage.
This ink powder level sensor purpose is to provide use to detect the piezoelectric vibration sensor that the vibration ink powder has or not by the self-oscillation unit, thereby and considers to start the ink powder level sensor that the amount of toner that flows along with stirring wing correctly detects the amount of toner in the powder box because of the ink powder stirring machine.
Ink powder level sensor of the present invention is used according to the self-oscillation unit and is detected the piezoelectric vibration sensor that the vibration ink powder has or not, thereby and considers correctly to detect amount of toner in the powder box because of amount of toner that the starting of ink powder stirring machine is flowed with stirring wing.
Description of drawings
Fig. 1 is an ink powder level sensor structural drawing of the present invention;
Fig. 2 is the working timing figure of Fig. 1;
Fig. 3 is the structural drawing of piezoelectric vibration sensor of the present invention;
Fig. 4 a or Fig. 4 e are the sketch that the piezoelectric vibration sensor is installed in the powder box; And
Fig. 5 is the structural drawing of expression ink powder stirring machine structure.
Embodiment
Below in conjunction with drawings and Examples this ink powder level sensor is further specified.
Fig. 1 is the schematic diagram of this ink powder level sensor.
Ink powder level sensor of the present invention is made up of following unit among Fig. 1:
Piezoelectric vibration sensor (10): have metal vibration plate (C), piezoceramic disk (D) and feedback end (F), and be positioned at the assigned position of powder box (2).When the amount of toner in the powder box (2) does not reach levels of the standard (LV) and powers up when flowing to piezoceramic disk (D), by feedback end (F) output the 1st signal (S1);
Oscillation control unit (20): accept the 1st signal, then above-mentioned feedback end will not exported the 2nd signal when adding piezoceramic disk because of above-mentioned the 1st marking current, above-mentioned feedback end is then exported the 1st signal during galvanization in because of above-mentioned the 2nd signal pressure electroplax, thereby the feedback end output that makes above-mentioned piezoelectric vibration sensor is with the oscillator signal of some cycles by the 1st signal to the 2 signal oscillatings;
Filter unit (30): oscillator signal (OSC) is carried out exporting direct current signal (DC) after the filtering;
Delay cell (40): if direct current signal (DC) remains unchanged and continues to remain effective value in the standard time section and then exports effective inhibit signal (DL), if direct current signal (DC) is invalid or then export invalid inhibit signal (DL) when standard time section direct current signal (DC) is variable signal;
Detecting unit (50): do not reach levels of the standard and export effective output signal (OUT) if inhibit signal effectively then detects the amount of toner of above-mentioned powder box.
Oscillation control unit (20) is connected to the 1st service voltage (Vcc) by a terminal, another terminal is connected to the 1st resistance (R1) of piezoceramic disk (D), has cardinal extremity, emitter terminals and collector terminal and cardinal extremity are connected to feedback end (F), collector terminal is connected to the another terminal of the 1st resistance (R1), emitter terminals is connected to the 1st transistor (Q1) of outputting oscillation signal (OSC), and a terminal is connected to the emitter terminals of the 1st transistor (Q1), another terminal is connected to the 2nd resistance (R2) of metal vibration plate (C) and another terminal that terminal is connected to the 2nd resistance (R2), another terminal is connected to part formations such as the 3rd resistance (R3) of the 2nd service voltage (Vss).
Wave filter (30) is connected to the 1st capacitor (C1) that oscillator signal (OSC), another terminal are connected to direct current signal (DC) by a terminal, and terminal is connected to direct current signal (DC), another terminal and is connected to the 4th resistance (R4) of the 2nd service voltage (Vss) and has anode tap and cathode terminal and negative electrode are connected to the diode that direct current signal (DC), anode be connected to the 2nd service voltage (Vss) and constitute.
Delay cell (40) is connected to the 5th resistance (R5) that direct current signal (DC), another terminal are connected to inhibit signal (DL) by a terminal, and terminal is connected to inhibit signal (DL), another terminal and is connected to the 2nd capacitor (C2) of the 2nd service voltage (Vss) and terminal and is connected to the 6th resistance (R6) three parts that inhibit signal (DL), another terminal be connected to the 2nd service voltage (Vss) and constitutes.
Detecting unit (50) is connected to the 1st service voltage (Vcc) by a terminal, what another terminal was connected to output signal output (OUT) lifts resistance (RP), accept the output delay signal (DL) and normal voltage (Vref) back of delay cell (40) and then export the comparer (51) of the comparison signal (CP) that activates and have cardinal extremity as if inhibit signal (DL) overgauge voltage (Vref), emitter terminals and collector and cardinal extremity are connected to comparison signal (CP), collector terminal is connected to another terminal that lifts resistance (RP), emitter terminals is connected to part formations such as the 2nd transistor (Q2) of the 2nd service voltage (Vss).
Shown in Fig. 4 a or Fig. 4 e, be equipped with in duplicating machine or the laser printer piezoelectric vibration sensor of the present invention (10) is installed on the sidewall in the powder box (2) of ink powder.The metal vibration plate (C) of piezoelectric vibration sensor this moment (10) should contact with ink powder.As shown in Figure 3, this piezoelectric vibration sensor (10) is made up of metal vibration plate (C), piezoceramic disk (D) and feedback end (F).If supply power then adds the 1st service voltage (Vcc) and then galvanization on the piezoceramic disk (D), metal vibration plate (C) is starting oscillation then, and by the oscillator signal of feedback end (F) output with the some cycles vibration.
If the ink powder (1) in the powder box (2) be more than the levels of the standard (LV), then can not vibrate and then feedback end (F) will be exported and hang down logical value because of the weight metal vibration plate (C) of ink powder (1).That is, whether ink powder (1) amount that piezoelectric vibration sensor (10) detects in the powder box (2) is below the levels of the standard (LV), if then by the oscillator signal of feedback end (F) output with the specified period vibration.
Shown in Fig. 1 and Fig. 4 a, if service voltage, then by the 1st resistance (R1) will be in the 1st service voltage (Vcc) and piezoceramic disk (D) galvanization, therefore should export the oscillator signal that vibrates with specified period by the feedback end (F) of piezoelectric vibration sensor (10), but because of the rank (LV) that is above standard of the amount of toner in the powder box (2), the metal vibration plate (C) of piezoelectric vibration sensor (10) thereby can not vibrate can not be forced by feedback end (F) outputting oscillation signal, will export low logical value.If shown in Fig. 4 e, work as galvanization in the piezoceramic disk (D), when causing interior ink powder (1) amount of powder box (2) to be less than levels of the standard (LV), then export the oscillator signal that vibrates with specified period by the feedback end (F) of piezoelectric vibration sensor (10) because of lasting use ink powder (1).
Shown in Fig. 1 and Fig. 4 a, if by the amount of the ink powder (1) in galvanization in the 1st resistance (R1) piezoceramic disk (D) and the powder box (2) be above standard rank (LV) then piezoelectric vibration sensor (10) forcibly make feedback end (F) not export any signal and then the outputting oscillation signal (OSC) that makes the 1st transistor (Q1) of oscillation control unit (20) become OFF and oscillation control unit (20) is and the identical ground voltage of the 2nd service voltage (Vss).Therefore will export low logical value as the direct current signal (DC) of wave filter (30) output, and make the output delay signal (DL) of delay cell (40) be low logical value because of not charging to the 2nd capacitor (C2) by direct current signal (DC) with low logical value.As the invalid low logical value signal of comparison signal (CP) output that the comparer (51) of detecting unit (50) is exported, therefore the 2nd transistor (Q2) will be changed to OFF.As shown in the working timing figure of Fig. 2,0 to T1 time period is exported high logic value as the output signal (OUT) of detecting unit (50) output because of lifting resistance (RP).
Fig. 5 is the structural drawing of expression ink powder stirring machine structure.
Turning axle (104) that ink powder stirring machine (101) is adorned by connecting the powder box (2) in the powder box (2) among Fig. 5 and stirring wing (102) and stirring pad (103) constitute.Power rotation turning axle (104) stirring wing (102) and stirring pad (103) when utilizing the starting of printer or duplicating machine rotate thereupon.Along with the stirring wing (102) and the rotation of stirring pad (103), the ink powder (1) in the powder box (2) thus mix smoothly and prevent solidifying of ink powder (1).
Shown in Fig. 4 e, even because of continuing to use ink powder (1) to cause the ink powder in the powder box (2) to be less than (1) levels of the standard (LV), and ink powder stirring machine (101) is also started, but when the ink powder (1) that flows with stirring wing (102) is not pressed metal vibration plate (C) fully piezoceramic disk (D) thus in the feedback end (F) of galvanization piezoelectric vibration sensor (10) is exported the signal that the 1st transistor (Q1) is changed to ON.Because of the 1st transistor (Q1) be ON, by the 1st transistor (Q1), the 2nd resistance (R2) and the 3rd resistance (R3) by the 1st service voltage (Vcc) to the 2nd service voltage (Vss) with galvanization.At this moment, obstructed electric current in the piezoceramic disk (D) of piezoelectric vibration sensor (10) will add the certain voltage of distributing because of the 2nd resistance (R2) and the 3rd resistance (R3) on the metal vibration plate (C).Thereby feedback end (F) makes the 1st transistor (Q1) be the signal of OFF output.When the 1st transistor (Q1) is OFF, in the piezoceramic disk (D) of piezoelectric vibration sensor (10) once more galvanization make feedback end (F) export once more to make the 1st transistor (Q1) be the signal of OFF.Promptly according to the ON or the OFF state of the 1st transistor (Q1), the oscillator signal of exporting as oscillation control unit (20) (OSC) is transformed into the 2nd signal (S2) continuation output with the some cycles oscillatory signal by the 1st signal (S1) constantly as the T7 that working timing figure is shown in that Fig. 2 plants.
Wave filter (30) is because of getting output with the oscillator signal (OSC) of some cycles vibration the direct current signal (DC) of high logic value.Diode (D) by wave filter (30) is converted to certain signal with hunting signal (OSC).(DC) continues to get high logic value because of direct current signal, after 2 seconds standard time or 3 seconds of deciding by the time constant of the 5th resistance (R5) and the 2nd capacitor (C2), promptly charge to the 2nd capacitor (C2) with the 1st service voltage (Vcc) constantly, will export high logic value as the inhibit signal (DL) of delay cell (40) output at T8.Comparer (51) is exported the effective comparison signal (CP) of getting high logic value because of the inhibit signal (DL) of getting high logic value, the 2nd transistor (Q2) then because of effective comparison signal (CP) thus being changed to ON will export as the output signal (OUT) of detecting unit (50) output and effectively hang down logical value and make the user know the interior toner low of powder box (2).
Shown in Fig. 4 b or Fig. 4 d, although the ink powder (1) in the powder box (2) is less than levels of the standard (LV), its work is as follows when the ink powder (1) that flows with stirring wing (102) because of the starting of ink powder stirring machine (101) is pressed metal vibration plate (C):
At first shown in Fig. 4 b, ink powder stirring machine (101) at the beginning of the starting beginning just with shown in Fig. 4 c like that when shaft (104) rotates half-turn the ink powder (1) in the powder box (2) be not pressurized to metal vibration plate (C), therefore export the oscillator signal (OSC) that vibrates with some cycles as oscillation control unit shown in Fig. 4 e (20), and the direct current signal (DC) of high logic value got output by wave filter (30).Shown in Fig. 4 d, during shaft (104) rotation 1 circle that rotates because of the starting of ink powder stirring machine (101) metal vibration plate (C) by the ink powder (1) that is flowed with stirring wing (102) pressurize make metal vibration plate (C) thus the 1st transistor (Q1) that nonoscillatory piezoelectric vibration sensor (10) forcibly makes feedback end (F) not export any signal and oscillation control unit (20) is changed to OFF makes the outputting oscillation signal (OSC) of oscillation control unit (20) become and the identical ground voltage of the 2nd service voltage (Vss).
Promptly, although the amount of the ink powder (1) in the powder box (2) is for below the levels of the standard (LV), along with the starting shaft (104) of ink powder stirring machine (101) will rotate, and the ink powder (1) that flows with stirring wing (102) or make metal vibration plate (C) nonoscillatory or vibration, therefore the outputting oscillation signal (OSC) of oscillation control unit (20) with the some cycles oscillatory signal, hangs down logical value and export to the time period of T5 to time period, the T4 of T3 at T2 in as shown in Figure 2 the T1 time period output to time period of T2, T3 to T4.In general, approximately needed for 2 seconds because shaft (104) revolves to turn around, thus during every half-turn before through 1 second the output of oscillator signal (OSC) by changing low logical value into the some cycles oscillatory signal.
As shown in Figure 2, the time period output high logic value of direct current signal (DC) as wave filter (30) output from T1 (T3) to T2 (T4), and will export low logical value from T2 (T4) to the time period of T3 (T5), even get high logic value to T2 (T4) time period direct current signal (DC) from T1 (T3), the time constant value of the 5th resistance (R5) the 2nd capacitor (C2) that can be by setting delay cell (40) make time period the 2nd capacitor (C2) from T1 (T3) to T2 (T4) can not be by the 1st service voltage (Vcc) thus the output delay signal (DL) of charging delay cell (40) is for hanging down logical value.Output signal (OUT) as detecting unit (50) output is exported high logic value by lifting resistance (RP).
Piezoelectric vibration sensor (10) in this ink powder level sensor relies on the feedback end (F) and the oscillation control unit (20) of piezoelectric vibration sensor (10) to shake voluntarily, therefore compare the oscillator signal that does not need extra oscillatory circuit to produce piezoelectric sensor with the past technology, and because of considering the work of ink powder stirring machine (101), even to be levels of the standard (LV) following but be not deficiency if thereby the ink powder (1) that flows with stirring wing (102) makes detecting unit (50) output get the output signal (OUT) of high logic value tell ink powder (1) in user's powder box (2) to measure in the time of can fully being pressurized to (C) on the metal vibration plate for amount of toner, if because of continuing to use ink powder to cause amount of toner as below the levels of the standard (LV), and thereby the ink powder (1) that flows with stirring wing (102) because of the work of ink powder stirring machine (101) makes detecting unit (50) output get the output signal (OUT) of low logical value tells ink powder (1) quantity not sufficient in user's powder box (2) in the time of can not being pressurized to metal vibration plate (C), can prevent unnecessary waste thus and can correctly detect the ink powder rank.
Claims (6)
1. ink powder level sensor is characterized in that being made up of following plurality of units:
Piezoelectric vibration sensor (10): have metal vibration plate (C), piezoceramic disk (D) and feedback end (F), and be positioned at the assigned position of powder box (2).When the amount of toner in the powder box (2) does not reach levels of the standard (LV) and when powering up when flowing to piezoceramic disk (D), by feedback end (F) output the 1st signal (S1);
Oscillation control unit (20): accept the 1st signal, then above-mentioned feedback end will not exported the 2nd signal when adding piezoceramic disk because of above-mentioned the 1st marking current, above-mentioned feedback end is then exported the 1st signal during galvanization in because of above-mentioned the 2nd signal pressure electroplax, thereby the feedback end output that makes above-mentioned piezoelectric vibration sensor is with the oscillator signal of some cycles by the 1st signal to the 2 signal oscillatings;
Filter unit (30): oscillator signal (OSC) is carried out exporting direct current signal (DC) after the filtering;
Delay cell (40): if direct current signal (DC) remains unchanged and continues to remain effective value in the standard time section and then exports effective inhibit signal (DL), if direct current signal (DC) is invalid or then export invalid inhibit signal (DL) when standard time section direct current signal (DC) is variable signal;
Detecting unit (50): do not reach levels of the standard and export effective output signal (OUT) if inhibit signal effectively then detects the amount of toner of above-mentioned powder box.
2. the oscillation control unit described in the claim 1 is characterized in that being made up of following element:
Terminal is connected to the 1st resistance that the 1st service voltage, another terminal are connected to piezoceramic disk;
Have cardinal extremity, emitter terminals and collector terminal and cardinal extremity are connected to the 1st transistor that another terminal, emitter terminals that above-mentioned feedback end, collector terminal be connected to above-mentioned the 1st resistance are connected to outputting oscillation signal;
Terminal is connected to the 2nd resistance that the above-mentioned the 1st transistorized emitter terminals, another terminal are connected to above-mentioned metal vibration plate;
And a terminal is connected to another terminal of above-mentioned the 2nd resistance, the 3rd resistance that another terminal is connected to above-mentioned the 2nd service voltage.
3. the filter unit described in the claim 1 is characterized in that being made up of following element:
Terminal is connected to the 1st capacitor that above-mentioned oscillator signal, another terminal are connected to direct current signal;
Terminal is connected to the 4th resistance that above-mentioned direct current signal, another terminal are connected to the 2nd service voltage; And
Have anode and negative electrode and negative electrode and be connected to the diode that direct current signal, anode are connected to the 2nd service voltage.
4. the delay cell described in the claim 1 is characterized in that being made up of following element:
Terminal is connected to the 5th resistance that direct current signal, another terminal are connected to inhibit signal;
Terminal is connected to the 2nd capacitor that inhibit signal, another terminal are connected to above-mentioned the 2nd service voltage;
And terminal is connected to the 6th resistance that inhibit signal, another terminal are connected to above-mentioned the 2nd service voltage.
5. the detecting unit described in the claim 1 is characterized in that being made up of following element:
Terminal is connected to the resistance that lifts that the 1st service voltage, another terminal are connected to output signal output;
Accept the output delay signal and the normal voltage of above-mentioned delay cell, if inhibit signal overgauge voltage is then exported the comparing unit of the comparison signal of activation;
And have cardinal extremity, emitter terminals and collector terminal and cardinal extremity is connected to above-mentioned comparison signal, collector terminal is connected to the 2nd transistor that above-mentioned another terminal, the emitter terminals that lifts resistance is connected to the 2nd service voltage.
6. the ink powder level sensor described in the claim 1 is characterized in that the standard time is 2 seconds or 3 seconds.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0101734A KR100536268B1 (en) | 2003-12-31 | 2003-12-31 | toner level sensing circuit |
| KR0101734/2003 | 2003-12-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1637660A true CN1637660A (en) | 2005-07-13 |
| CN100440062C CN100440062C (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410029637XA Expired - Fee Related CN100440062C (en) | 2003-12-31 | 2004-03-26 | Powdered ink grade sensor |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100536268B1 (en) |
| CN (1) | CN100440062C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019152844A (en) * | 2018-03-06 | 2019-09-12 | 株式会社リコー | Detection device, detection method, and detection program |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02251980A (en) * | 1989-03-27 | 1990-10-09 | Casio Electron Mfg Co Ltd | Decision device |
| JP2874892B2 (en) * | 1989-04-21 | 1999-03-24 | 株式会社リコー | Developing device |
| JP3518616B2 (en) * | 1993-10-22 | 2004-04-12 | 富士ゼロックス株式会社 | Toner empty detection method and apparatus |
| JPH11142219A (en) * | 1997-11-05 | 1999-05-28 | Tdk Corp | Piezoelectric toner sensor |
| KR100397815B1 (en) * | 2001-05-16 | 2003-09-13 | 태웅실업주식회사 | Powder level sensing circuit |
-
2003
- 2003-12-31 KR KR10-2003-0101734A patent/KR100536268B1/en not_active IP Right Cessation
-
2004
- 2004-03-26 CN CNB200410029637XA patent/CN100440062C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019152844A (en) * | 2018-03-06 | 2019-09-12 | 株式会社リコー | Detection device, detection method, and detection program |
| JP7024508B2 (en) | 2018-03-06 | 2022-02-24 | 株式会社リコー | Detection device, detection method, and detection program |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050070994A (en) | 2005-07-07 |
| KR100536268B1 (en) | 2005-12-12 |
| CN100440062C (en) | 2008-12-03 |
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Granted publication date: 20081203 Termination date: 20110326 |