WO2022225551A1 - Calcul de l'amplitude de rotation d'une vis d'alimentation en encre en poudre sur la base d'une structure dans laquelle le rapport de réduction varie - Google Patents

Calcul de l'amplitude de rotation d'une vis d'alimentation en encre en poudre sur la base d'une structure dans laquelle le rapport de réduction varie Download PDF

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Publication number
WO2022225551A1
WO2022225551A1 PCT/US2021/053163 US2021053163W WO2022225551A1 WO 2022225551 A1 WO2022225551 A1 WO 2022225551A1 US 2021053163 W US2021053163 W US 2021053163W WO 2022225551 A1 WO2022225551 A1 WO 2022225551A1
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WO
WIPO (PCT)
Prior art keywords
drive transmission
transmission apparatus
driving gear
driving source
signal
Prior art date
Application number
PCT/US2021/053163
Other languages
English (en)
Other versions
WO2022225551A9 (fr
Inventor
Changwoo Lee
Jiyoung BYUN
Byungwoo KIM
Original Assignee
Hewlett-Packard Development Company, L.P.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett-Packard Development Company, L.P. filed Critical Hewlett-Packard Development Company, L.P.
Publication of WO2022225551A1 publication Critical patent/WO2022225551A1/fr
Publication of WO2022225551A9 publication Critical patent/WO2022225551A9/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • 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
    • G03G15/0891—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity for conveying or circulating developer, e.g. augers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1642—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements for connecting the different parts of the apparatus
    • G03G21/1647—Mechanical connection means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1839—Means for handling the process cartridge in the apparatus body
    • G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
    • 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
    • G03G2215/08—Details of powder developing device not concerning the development directly
    • G03G2215/0802—Arrangements for agitating or circulating developer material
    • G03G2215/0816—Agitator type
    • G03G2215/0827—Augers
    • 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
    • G03G2215/08—Details of powder developing device not concerning the development directly
    • G03G2215/0888—Arrangements for detecting toner level or concentration in the developing device

Definitions

  • An image forming apparatus uses toner in a toner cartridge to print a toner image on a print medium. Because toner is used every time the image forming operation proceeds, the toner is exhausted based on being used for a preset time or more. Thus, a toner cartridge may be replaced periodically. An image forming apparatus may detect a rotation amount of a toner supply auger and identify an amount of consumption of toner in a toner cartridge.
  • FIG. 1 illustrates an inner structure of an image forming apparatus to rotate a toner supply auger according to an example.
  • FIG. 2 is a block diagram of an image forming apparatus according to an example.
  • FIGS. 3A and 3B are diagrams illustrating a change in a speed reduction ratio according to a structure of a drive transmission apparatus to rotate a toner supply auger and an operation of the drive transmission apparatus according to an example.
  • FIG. 3C illustrates a load signal of a drive transmission apparatus according to a change in a speed reduction ratio according to an example.
  • FIG. 4A is a diagram of a circuit to detect a reference signal corresponding to a load signal of a drive transmission apparatus from a driving source according to an example.
  • FIG. 4B is a diagram of a circuit to detect a reference signal corresponding to a load signal of a drive transmission apparatus from a driving source according to another example.
  • FIG. 5 illustrates a load signal and a reference signal of a driving source, the reference signal corresponding to the load signal, according to an example.
  • FIG. 6 illustrates a voltage detection circuit to detect a reference signal according to an example.
  • FIG. 7 illustrates an operation of a drive transmission apparatus according to an example.
  • FIG. 8 illustrates a load signal and a reference signal of a driving source, the reference signal corresponding to the load signal, according to an operation of a drive transmission apparatus according to an example.
  • FIGS. 9Aand 9B illustrate a driving source and a drive transmission apparatus operating based on a signal detected by a sensor in an image forming apparatus according to an example.
  • FIGS. 10A to 10C illustrate a drive transmission apparatus, which includes a driving gear having a variable speed reduction ratio, and a driving source according to an example.
  • FIG. 11 is a flowchart of an operating method of an image forming apparatus to detect a reference signal corresponding to a load signal of a drive transmission apparatus from a driving source and to calculate a rotation amount of a toner supply auger using the reference signal according to an example.
  • FIG. 12 illustrates instructions stored in a computer-readable storage medium according to an example.
  • An "image forming apparatus” may be any type of apparatus capable of performing an image forming operation, such as a printer, a copier, a scanner, a fax machine, a multi-function printer (MFP), or a display apparatus. Also, the image forming apparatus may be a two-dimensional (2D) image forming apparatus or a three-dimensional (3D) image forming apparatus. An “image forming operation performed by the image forming apparatus” may be an operation related to printing, copying, scanning, faxing, storage, transmission, coating, etc., and may be a combination of at least two of the operations.
  • a "driving source" in the image forming apparatus may generate power to operate a preset member (e.g., component) of the image forming apparatus.
  • the driving source may include a motor to generate power.
  • the motor may be a step motor or a direct current motor (DC).
  • a "drive transmission apparatus" in the image forming apparatus may rotate a preset member using power transmitted from the driving source.
  • the drive transmission apparatus may be located between a toner supply auger and the driving source, and may be an apparatus to transmit power transmitted from the driving source to the toner supply auger.
  • the drive transmission apparatus may include a driving gear having a variable speed reduction ratio.
  • the speed reduction ratio may refer to a ratio of a speed at which a drive shaft and a driven shaft rotate.
  • a shaft of the driving gear of the drive transmission apparatus may be a drive shaft, and a shaft of a rotary coupler of the toner supply auger may be a driven shaft.
  • a speed reduction ratio may vary while the driving gear rotates.
  • the drive transmission apparatus may include a plurality of driving gears having a variable speed reduction ratio.
  • a "load signal” may be a signal for a torque that causes the driving gear to rotate by a force acting on the driving gear. Based on a rotation of the driving gear having a variable speed reduction ratio, the load signal detected from the driving gear may have a period and may be represented by a preset waveform.
  • a "reference signal” may a signal detected from the driving source to calculate a rotation amount of a preset configuration of the image forming apparatus. In this regard, the preset configuration may be a rotating body such as the toner supply auger or the like. Also, the reference signal may be a signal corresponding to the load signal of the drive transmission apparatus. Also, the reference signal may be a signal obtained by processing a signal detected from the driving source. For example, the reference signal may be a signal obtained by converting an analog signal detected from the driving source into a digital signal.
  • FIG. 1 illustrates an inner structure of an image forming apparatus to rotate a toner supply auger according to an example.
  • a driving source 101 may generate power and transmit the generated power to a drive transmission apparatus.
  • the drive transmission apparatus may rotate a toner supply auger using the power.
  • a driving gear 102 of the driving source 101 may rotate.
  • a first driving gear 103 of the drive transmission apparatus may rotate at the same time. That is, the driving gear 102 of the driving source 101 and the first driving gear 103 of the drive transmission apparatus may be engaged together and rotate.
  • a first variable driving gear 301 of the drive transmission apparatus may be coupled to the first driving gear 103 of the drive transmission apparatus.
  • the first variable driving gear 301 may be a driving gear having a variable speed reduction ratio according to rotation. Based on a rotation of the first driving gear 103 of the drive transmission apparatus, the first variable driving gear 301 of the drive transmission apparatus and a rotary coupler 107 of the toner supply auger may rotate at the same time. Also, during a preset time, the number of rotations of the first variable driving gear 301 of the drive transmission apparatus may be equal to the number of rotations of the first driving gear 103 of the drive transmission apparatus.
  • a second variable driving gear 302 of the drive transmission apparatus may rotate.
  • the second variable driving gear 302 may be a driving gear having a variable speed reduction ratio according to rotation.
  • the second variable driving gear 302 of the drive transmission apparatus may be coupled to a second driving gear 106 of the drive transmission apparatus.
  • the second driving gear 106 of the drive transmission apparatus and a third driving gear 108 of the drive transmission apparatus may rotate at the same time.
  • the number of rotations of the second variable driving gear 302 of the drive transmission apparatus may be equal to the number of rotations of the second driving gear 106 of the drive transmission apparatus.
  • a rotary coupler 109 of the toner supply auger may rotate.
  • the rotary couplers 107 and 109 of the toner supply auger may be members coupled to the toner supply auger so that the toner supply auger may rotate.
  • the drive transmission apparatus receives the power from the driving source 101 and drives the driving gears 103, 301 , 302, 106, and 108 in the drive transmission apparatus.
  • the rotary couplers 107 and 109 of the toner supply auger may rotate the toner supply auger.
  • the image forming apparatus may calculate a rotation amount of the toner supply auger and calculate an amount of consumption of toner in a toner cartridge from the calculated rotation amount of the toner supply auger.
  • the image forming apparatus may obtain a rotation amount of the sensing rib detected by the sensor and calculate a rotation amount of the toner supply auger according to the rotation amount of the sensing rib. That is, the image forming apparatus may calculate an amount of consumption of toner in a toner cartridge based on the rotation amount of the sensing rib detected by the sensor.
  • mounting of the sensing rib and the sensor incurs an additional cost, and design constraints may occur due to the mounting of the sensing rib and the sensor within a limited space.
  • the drive transmission apparatus of the image forming apparatus may be designed to have a structure having a variable speed reduction ratio, and the image forming apparatus may include a sensing unit to detect a reference signal corresponding to a load signal of the drive transmission apparatus from the driving source.
  • FIG. 2 is a block diagram of an image forming apparatus according to an example.
  • an image forming apparatus 10 may include a driving source 210, a drive transmission apparatus 220, a sensing unit 230, and a processor 240.
  • the illustrated components are not mandatory components.
  • the image forming apparatus 10 may be implemented by more or fewer components. Examples of the components will be described below.
  • the driving source 101 described in FIG. 1 may correspond to the driving source 210.
  • the driving gears 103, 106, 108, 301 , and 302 described in FIG. 1 may be components of the drive transmission apparatus 220.
  • the driving source 210 may generate power.
  • the driving source 210 may generate power to drive members of the image forming apparatus 10 and may transmit the power to the drive transmission apparatus 220.
  • the driving source 210 may include a motor to generate power.
  • the motor may be a step motor or a DC motor.
  • the drive transmission apparatus 220 may rotate a member of the image forming apparatus 10 using the power transmitted from the driving source 210.
  • the drive transmission apparatus 220 may rotate a toner supply auger using the power.
  • the drive transmission apparatus 220 may include a driving gear having a speed reduction ratio varying according to rotation of the toner supply auger.
  • the drive transmission apparatus 220 may include driving gears having at least two speed reduction ratios and driving gears having a non-constant radius.
  • the driving gears having a non-uniform radius may refer to driving gears whose radius is not constant. That is, the driving gears having a non-constant radius may be driving gears having a plurality of radii.
  • the drive transmission apparatus 220 may include oval driving gears having different sizes. Each of the driving gears may rotate different toner supply augers.
  • a load or speed of the drive transmission apparatus 220 may vary. Because the driving gear of the drive transmission apparatus 220 receives power from the driving source 210, a variable load or speed of the drive transmission apparatus 220 may also affect an operation of the driving source 210. Thus, the sensing unit 230 may detect a load state of the driving source 210 by monitoring a voltage of a sense resistor of the driving source 210.
  • the sensing unit 230 may detect, from the driving source 210, a reference signal corresponding to a load signal of the drive transmission apparatus 220.
  • the load signal varies based on a variation in a speed reduction ratio of the driving gear of the drive transmission apparatus 220.
  • the drive transmission apparatus 220 may rotate the toner supply auger, and the sensing unit 230 may detect the reference signal having a period identical to a period of the load signal of the drive transmission apparatus 220.
  • the driving source 210 may include a resistance circuit including a sense resistor to detect a load signal of the driving source 210 corresponding to a load signal of the drive transmission apparatus 220.
  • the sensing unit 230 may include a voltage detection circuit to detect a reference signal by monitoring a voltage of the sense resistor of the resistance circuit.
  • FIGS. 4A and 4B examples of the resistance circuit and the voltage detection unit are described.
  • the voltage detection circuit may detect a load signal of the driving source 210 which varies in the sense resistor.
  • the load signal of the driving source 210 may be an analog signal.
  • the voltage detection circuit may obtain a low frequency load signal including a preset low frequency from the load signal of the driving source 210.
  • the voltage detection circuit may obtain a low frequency load signal by passing the load signal of the driving source 210 through a circuit having a function of a low pass filter.
  • the voltage detection circuit may obtain an amplified analog signal by amplifying the low frequency voltage signal using an amplifier.
  • the voltage detection circuit may detect a reference signal by converting the analog signal to a digital signal using an analog-digital converter (ADC).
  • ADC analog-digital converter
  • the processor 240 may control an operation of the image forming apparatus 10 and include a processor such as a central processing unit (CPU), or the like.
  • the processor 240 may include a specialized processor corresponding to each function, or may be an integrated type of processor.
  • the processor 240 may execute a program stored in a memory, read data stored in the memory, or store new data.
  • the processor 240 may execute instructions stored in the memory.
  • the processor 240 may calculate a rotation amount of the toner supply auger based on a reference signal. For example, the processor 240 may calculate a rotation amount of the toner supply auger based on the number of rotations of the drive transmission apparatus 220 per period of the reference signal and the number of periods of the reference signal. As an example, the processor 240 may calculate a rotation amount of the toner supply auger by multiplying the number of rotations of the drive transmission apparatus 220 per period of the reference signal and the number of periods of the reference signal.
  • the processor 240 may calculate a rotation amount of the driving source 210 based on the number of rotations of the drive transmission apparatus 220 per period of the reference signal and a speed reduction ratio of the driving source 210 with respect to the drive transmission apparatus 220. As an example, the processor 240 may calculate a rotation amount of the driving source 210 by multiplying the number of rotations of the drive transmission apparatus 220 per period of the reference signal and a speed reduction ratio of the driving source 210 with respect to the drive transmission apparatus 220. [0047] For example, the processor 240 may detect a malfunction of the driving source 210 based on a result of identifying whether a rotation amount of the driving source 210 satisfies a range of a reference rotation amount.
  • the processor 240 may detect a malfunction of the driving source 210.
  • a user interface apparatus of the image forming apparatus 10 may display information notifying that the malfunction of the driving source 210 has been detected. Based on detection of the malfunction of the driving source 210, heat generation or a burnout symptom of the motor in the driving source 210 may be prevented.
  • the processor 240 may control an operation of the drive transmission apparatus 220 based on a result of identifying whether a magnitude of a load of the drive transmission apparatus 220 satisfies a magnitude of a reference load.
  • the drive transmission apparatus 220 may control an operation of controlling a rotation direction or rotation speed of the driving gear and an operation of stopping rotation of the driving gear.
  • the processor 240 may control the driving gear of the drive transmission apparatus 220 to rotate.
  • the processor 240 may stop rotation of the driving gear of the drive transmission apparatus 220.
  • the image forming apparatus 10 may control an operation of the driving gear with information of the driving gear from which the reference load is detected and without an additional sensor mounted in the image forming apparatus 10.
  • the processor 240 may calculate an amount of consumption of toner in a toner cartridge based on a rotation amount of the toner supply auger.
  • FIGS. 3A and 3B are diagrams illustrating a change in a speed reduction ratio according to a structure of a drive transmission apparatus to rotate a toner supply auger and an operation of the drive transmission apparatus according to an example.
  • the driving source 101 may correspond to the driving source 210 shown in FIG. 2.
  • the driving gears 103, 106, 108, 301 , and 302 shown in FIGS. 3A and 3B may be components of the drive transmission apparatus 220 shown in FIG. 2.
  • a driving gear having a speed reduction ratio varying according to rotation may each be referred to as a variable driving gear.
  • the driving gears 301 and 302 may be referred to as a variable driving gear.
  • the driving source 101 may generate power and control a rotation operation of the driving gear 102 of the driving source 101 to transmit the power to the driving gears 103, 106, 108, 301 , and 302 of the drive transmission apparatus.
  • the first driving gear 103 of the drive transmission apparatus and the driving gear 102 of the driving source 101 may be engaged together and rotate.
  • the first variable driving gear 301 of the drive transmission apparatus may also rotate.
  • the second variable driving gear 302 of the drive transmission apparatus may also rotate.
  • the second variable driving gear 302 of the drive transmission apparatus may be coupled to the second driving gear 106 of the drive transmission apparatus. Based on a rotation of the second variable driving gear 302 of the drive transmission apparatus, the second driving gear 106 of the drive transmission apparatus and the third driving gear 108 of the drive transmission apparatus may rotate at the same time.
  • the drive transmission apparatus may rotate the rotary couplers 107 and 109 of the toner supply auger using the power transmitted to the driving gears 103, 106, 108, 301 , and 302. For example, based on respective rotation of the first driving gear 103 of the drive transmission apparatus and the third driving gear 108 of the drive transmission apparatus, the rotary coupler 107 of the toner supply auger and the rotary coupler 109 of the toner supply auger may rotate.
  • the first variable driving gear 301 and the second variable driving gear 302 may be designed as ovals of different sizes.
  • a magnitude of a torque acting on the driving gear may vary. That is, based on a rotation of the first variable driving gear 301 and the second variable driving gear 302, a speed reduction ratio of each of the first variable driving gear 301 and the second variable driving gear 302 may vary, and a magnitude of a load detected on each of the first variable driving gear 301 and the second variable driving gear 302 may vary.
  • the variable driving gears 301 and 302 may be driving gears having at least two speed reduction ratios or driving gears having a non-constant radius.
  • variable driving gears 301 and 302 respectively show forms of the variable driving gears 301 and 302 at a first time point at which the first variable driving gear 301 and the second variable driving gear 302 are engaged together and rotate.
  • the second variable driving gear 302 may rotate counter-clockwise.
  • a magnitude of a torque of the first variable driving gear 301 may be smaller than a magnitude of a torque of the second variable driving gear 302.
  • a rotation speed of the first variable driving gear 301 may be greater than a rotation speed of the second variable driving gear 302.
  • variable driving gears 301 and 302 respectively show forms of the variable driving gears 301 and 302 at a second time point at which the first variable driving gear 301 and the second variable driving gear 302 are engaged together and rotate.
  • a magnitude of a torque of the first variable driving gear 301 may be greater than a magnitude of a torque of the second variable driving gear 302.
  • a rotation speed of the first variable driving gear 301 may be smaller than a rotation speed of the second variable driving gear 302.
  • a speed reduction ratio of each of the variable driving gears may vary. Based on a variation of the speed reduction ratio of each of the variable driving gears, a magnitude of a load detected on each of the first variable driving gear 301 and the second variable driving gear 302 may vary.
  • FIG. 3C illustrates a load signal of a drive transmission apparatus according to a change in a speed reduction ratio according to an example.
  • the first variable driving gear 301 may be an oval driving gear whose long axis and short axis are a and b, respectively.
  • a>b>0 may be satisfied.
  • the second variable driving gear 302 may be an oval driving gear whose long axis and short axis are c and d, respectively.
  • c>d>0 may be satisfied.
  • an apex of the long axis of the first variable driving gear 301 may meet an apex of the short axis of the second variable driving gear 302, and an apex of the short axis of the first variable driving gear 301 may meet an apex of the long axis of the second variable driving gear 302.
  • a magnitude of a torque acting on the first variable driving gear 301 may be the lowest. That is, a magnitude of a load detected on the first variable driving gear 301 at the first time point may be the lowest.
  • a magnitude of a torque acting on the first variable driving gear 301 may be the highest. That is, a magnitude of a load detected on the first variable driving gear 301 at the second time point may be the highest.
  • FIG. 4A is a diagram of a circuit to detect a reference signal corresponding to a load signal of a drive transmission apparatus from a driving source according to an example.
  • the driving source may include a motor to generate power.
  • the motor may be a step motor or a DC motor.
  • a constant current driver integrated circuit (1C) may be used to drive the motor.
  • a circuit to detect a reference signal corresponding to a load signal of the drive transmission apparatus from the step motor may be provided.
  • a driver 1C of the step motor may include a sense resistor 410 to detect a load signal of the step motor.
  • the load signal of the step motor corresponding to the load signal of the drive transmission apparatus may be detected via the sense resistor 410.
  • a voltage detection circuit 420 to detect a reference signal may be connected to the driver IC of the step motor to monitor a voltage of the sense resistor 410.
  • the voltage detection circuit 420 may include a low pass filter 421 , an amplifier 422, and an ADC port 423.
  • the voltage detection circuit 420 may detect a load signal of the step motor, the load signal being varied in the sense resistor 410.
  • the low pass filter 421 may obtain a low frequency load signal including a low frequency by passing a signal of a preset low frequency from the load signal of the step motor. Because a voltage level of the low frequency load signal may be smaller than a preset voltage level, the amplifier 422 may obtain an analog signal by amplifying the low frequency load signal.
  • the ADC port 423 may detect a reference signal by converting the analog signal to a digital signal.
  • the ADC port 423 may convert an analog voltage signal to a digital signal based on a threshold voltage.
  • the ADC port 423 may convert a signal greater than the threshold voltage in the analog voltage signal to a high signal, and may convert a signal less than the threshold voltage in the analog voltage signal to a low signal.
  • FIG. 4B is a diagram of a circuit to detect a reference signal corresponding to a load signal of a drive transmission apparatus from a driving source according to another example.
  • a circuit to detect a reference signal corresponding to a load signal of the drive transmission apparatus from the DC motor may be provided.
  • a driver IC of the DC motor may include a sense resistor 430 to detect a load signal of the DC motor.
  • the load signal of the DC motor corresponding to the load signal of the drive transmission apparatus may be detected via the sense resistor 430.
  • a voltage detection circuit 440 to detect a reference signal may be connected to the driver IC of the DC motor to monitor a voltage of the sense resistor 430.
  • the voltage detection circuit 440 may include a low pass filter 441 , an amplifier 442, and an ADC port 443.
  • FIG. 5 illustrates a load signal and a reference signal of a driving source, the reference signal corresponding to the load signal, according to an example.
  • a voltage detection circuit may detect a load signal of a driving source from a sense resistor of the driving source.
  • the load signal may be a voltage signal of the sense resistor.
  • the voltage detection circuit may obtain a low frequency load signal by passing the load signal of the driving source through a low pass filter.
  • the voltage detection circuit may obtain an amplified analog signal by amplifying the low frequency load signal via an amplifier.
  • a graph 510 of FIG. 5 illustrates an analog voltage signal.
  • the voltage detection circuit may input the amplified analog signal as an input signal of an ADC port and obtain a reference signal obtained by converting the analog signal to a digital signal.
  • the ADC port may convert an analog voltage signal to a digital signal based on a threshold voltage.
  • the ADC port may convert a signal greater than the threshold voltage in the analog voltage signal to a high signal, and may convert a signal less than the threshold voltage in the analog voltage signal to a low signal.
  • FIG. 6 illustrates a voltage detection circuit to detect a reference signal according to an example.
  • the ADC port in the voltage detection circuit described in FIGS. 4A and 4B may be described with a circuit diagram as shown in FIG. 6.
  • a signal for which a threshold voltage is set and a voltage signal detected via a sense resistor of a driving source may be input to an input terminal of a comparator.
  • the voltage signal may be an analog signal.
  • a reference signal obtained by converting the analog signal to a digital signal may be detected from a general-purpose input output (GPIO) port.
  • GPIO general-purpose input output
  • FIG. 7 illustrates an operation of a drive transmission apparatus according to an example.
  • images 710, 720, and 730 illustrate a coupling state between the first variable driving gear 301 and the second variable driving gear 302 according to an example operation of the drive transmission apparatus.
  • the image 710 of FIG. 7 illustrates a coupling state between the first variable driving gear 301 and the second variable driving gear 302 at a first time point (i.e. , reference 1 in image 710) at which an apex of a short axis of the first variable driving gear 301 meets an apex of a long axis of the second variable driving gear 302.
  • a magnitude of a load detected on the first variable driving gear 301 may be the lowest.
  • the image 720 of FIG. 7 illustrates a coupling state between the first variable driving gear 301 and the second variable driving gear 302 at a second time point (i.e., reference 2 in image 720) at which a preset apex of the first variable driving gear 301 meets a preset apex of the second variable driving gear 302.
  • a load detected on the first variable driving gear 301 may be between the lowest load and the highest load which may be detected on the first variable driving gear 301 .
  • the image 730 of FIG. 7 illustrates a coupling state between the first variable driving gear 301 and the second variable driving gear 302 at a third time point (i.e., reference 3 in image 730) at which an apex of a long axis of the first variable driving gear 301 meets an apex of a short axis of the second variable driving gear 302.
  • a magnitude of a load detected on the first variable driving gear 301 may be the highest.
  • FIG. 8 illustrates a load signal and a reference signal of a driving source, the reference signal corresponding to the load signal, according to an operation of a drive transmission apparatus according to an example.
  • a graph 811 in an image 810 refers to a load signal of the first variable driving gear 301. While the first variable driving gear 301 rotates, because a torque acting on the first variable driving gear 301 varies periodically, a load detected on the first variable driving gear 301 may vary periodically.
  • the first variable driving gear 301 may rotate 0.25 turn.
  • a magnitude of a load acting on the first variable driving gear 301 at a first time point at which an apex of a short axis of the first variable driving gear 301 meets an apex of a long axis of the second variable driving gear 302 may be the lowest.
  • a magnitude of a load acting on the first variable driving gear 301 at a second time point at which a preset apex of the first variable driving gear 301 meets a preset apex of the second variable driving gear 302 may be a median value between the lowest value and the highest value.
  • a magnitude of a load acting on the first variable driving gear 301 at a third time point at which an apex of a long axis of the first variable driving gear 301 meets an apex of a short axis of the second variable driving gear 302 may be the highest.
  • a load or speed which varies based on a rotation of the first variable driving gear 301 may also affect a driving gear of the driving source.
  • a period of a load signal of the driving gear of the driving source may be identical to a period of the load signal of the first variable driving gear 301. That is, a period of a load signal of the driving source may be identical to a period of a load signal of the drive transmission apparatus.
  • a graph 812 in the image 810 of FIG. 8 refers to a load signal of the driving gear of the driving source.
  • An image 820 of FIG. 8 illustrates the graph 812 showing the load signal of the driving gear of the driving source and a graph 821 showing a reference signal obtained by converting the load signal to a digital signal.
  • a voltage detection circuit may detect the reference signal by converting the load signal of the driving gear of the driving source to a digital signal. For example, a signal greater than a threshold voltage in the load signal may be converted to a high signal, and a signal less than the threshold voltage in the load signal may be converted to a low signal. For example, a value of the high signal may be a preset value greater than 0, and a value of the low signal may be 0.
  • the reference signal may represent a graph of a square wave.
  • a rotation amount of the toner supply auger may be calculated from a rotation amount of the first variable driving gear 301 .
  • a rotation amount of the toner supply auger may be identical to a rotation amount of the first variable driving gear 301 .
  • a period of the load signal of the driving gear of the driving source may be identical to the load signal of the first variable driving gear 301 .
  • the processor in the image forming apparatus 10 may calculate a rotation amount of the driving gear of the driving source from a reference detected from the driving source.
  • the image forming apparatus 10 may calculate a rotation amount of the toner supply auger from the rotation amount of the driving gear of the driving source.
  • the image forming apparatus 10 may calculate the rotation amount of the toner supply auger based on the number of rotations of the drive transmission apparatus per period of the reference signal and the number of periods of the reference signal.
  • the first variable driving gear 301 may rotate 0.25 turn.
  • the number of rotations of the first variable driving gear 301 per period of the reference signal is 0.5.
  • the number of rotations of the first variable driving gear 301 may be 2.
  • the image forming apparatus 10 may calculate the rotation amount of the toner supply auger based on the number of rotations of the first variable driving gear 301 and a rotational relationship between the first variable driving gear 301 and the rotary coupler of the toner supply auger. For example, based on a speed reduction ratio between the first variable driving gear 301 and the rotary coupler of the toner supply auger being 1 , the image forming apparatus 10 may calculate the number of rotations of the toner supply auger as 2.
  • the image forming apparatus 10 may calculate the rotation amount of the driving source based on the number of rotations of the drive transmission apparatus per period of the reference signal and a speed reduction ratio of the driving source with respect to the drive transmission apparatus.
  • the number of rotations of the first variable driving gear 301 per period of the reference signal is 0.5.
  • the image forming apparatus 10 may calculate the rotation amount of the driving source based on the number of rotations of the first variable driving gear 301 per period of the reference signal and a speed reduction ratio of the driving source with respect to the first variable driving gear 301 .
  • the number of rotations of the driving source is 27.5.
  • the image forming apparatus 10 may detect a malfunction of the driving source based on a result of identifying whether the rotation amount of the driving source satisfies a range of a reference rotation amount. As an example, based on a difference value between the rotation amount of the driving source and the reference rotation amount being an error between -3 % and + 3% with respect to the reference rotation amount, the image forming apparatus 10 may determine that the driving source operates normally. In contrast, based on a difference value between the rotation amount of the driving source and the reference rotation amount being out of an error between -3 % and + 3% with respect to the reference rotation amount, the image forming apparatus 10 may determine that the driving source operates abnormally. Based on the driving source operating abnormally, the image forming apparatus 10 may display information notifying of a malfunction of the driving source.
  • FIGS. 9A and 9B illustrate a driving source and a drive transmission apparatus operating based on a signal detected by a sensor in an image forming apparatus according to an example.
  • sensors 911 and 912 to detect a position of a member may be mounted in the image forming apparatus 10. Meanwhile, in the image forming apparatus 10, the driving source may generate power and transmit the power to the drive transmission apparatus, and a driving gear 930 of the drive transmission apparatus may use the power to operate the driving gear 920 of a member.
  • the sensors 911 and 912 may transmit a signal that has detected the member to a processor in the image forming apparatus 10. The processor may change a rotation direction of the driving gear 930 of the drive transmission apparatus based on the signal that has detected the member.
  • the processor may control the driving gear 930 of the drive transmission apparatus to rotate clockwise. Based on a clockwise rotation of the driving gear 930 of the drive transmission apparatus, the driving gear 920 of the member operates by being engaged with the driving gear 930 of the drive transmission apparatus, and the member rises in the upward direction.
  • the processor may control the driving gear 930 of the drive transmission apparatus to rotate counter-clockwise. Based on the driving gear 930 of the drive transmission apparatus rotating counter-clockwise, the driving gear 920 of the member operates by being engaged with the driving gear 930 of the drive transmission apparatus, and the member descends in the downward direction. In this case, the processor may control the driving gear 930 of the drive transmission apparatus to rotate counter-clockwise until the sensors 911 and 912 detect a preset second position of the member. Afterwards, based on the sensors 911 and 912 detecting the preset second position of the member, the processor may control the driving gear 930 of the drive transmission apparatus to rotate clockwise until the sensors 911 and 912 detect the preset first position of the member.
  • the processor may control an operation of the driving source, the drive transmission apparatus, and the member based on the signal by which the sensors 911 and 912 detect the member.
  • FIGS. 10A to 10C illustrate a drive transmission apparatus, which includes a driving gear having a variable speed reduction ratio, and a driving source according to an example.
  • the image forming apparatus 10 may control the operation of the driving source, drive transmission apparatus, and member based on the signal detected by the sensors 911 and 912, the sensors 911 and 912 are additionally mounted in the image forming apparatus 10. In that case, constraints on the design of members in the image forming apparatus 10 may arise due to the sensors 911 and 912. Thus, based on the driving gear of the drive transmission apparatus and the driving gear of the member being designed as driving gears having a variable speed reduction ratio, an additional sensor is not mounted, and spatial constraints in the image forming apparatus 10 may be removed.
  • the driving gear of the drive transmission apparatus may be designed as a variable driving gear 1020 having a speed reduction ratio varying according to rotation.
  • the driving gear of the member may be designed as a variable driving gear 1010 having a speed reduction ratio varying based on being engaged with the variable driving gear 1020 to vertically move the member.
  • the image forming apparatus 10 may control an operation of controlling a rotation direction or rotation speed of the variable driving gear 1020 of the drive transmission apparatus and an operation of stopping rotation of the variable driving gear 1020 of the drive transmission apparatus based on a result of identifying whether a magnitude of a load of the drive transmission apparatus satisfies a magnitude of a reference load.
  • variable driving gear 1010 of the member may operate by being engaged with the variable driving gear 1020 so that the member rises in the upward direction.
  • the processor in the image forming apparatus 10 may detect a first reference load of the drive transmission apparatus based on the member rising to the highest point within a movable range. Also, the processor may detect a second reference load of the drive transmission apparatus based on the member descending to the lowest point within the movable range. The processor may control the variable driving gear 1020 to rotate clockwise until the first reference load is detected. Based on detection of the first reference load, the processor determines that the member rises to the highest point in the movable range and may control the variable driving gear 1020 of the drive transmission apparatus to rotate counter-clockwise. The processor may control the variable driving gear 1020 of the drive transmission apparatus to rotate counter-clockwise until the second reference load is detected.
  • FIG. 11 is a flowchart of an operating method of an image forming apparatus to detect a reference signal corresponding to a load signal of a drive transmission apparatus from a driving source and calculating a rotation amount of a toner supply auger using the reference signal according to an example.
  • the image forming apparatus 10 may rotate the toner supply auger using power transmitted from the driving source by the drive transmission apparatus including the driving gear having a variable speed reduction ratio in operation 1110. Based on rotation of the toner supply auger, toner in a toner cartridge may be consumed.
  • the image forming apparatus 10 may detect a reference signal corresponding to a load signal of the drive transmission apparatus, the load signal varying based on rotation of the toner supply auger.
  • the image forming apparatus 10 may detect a load signal of the driving source corresponding to the load signal of the drive transmission apparatus via a sense resistor of the driving source.
  • the image forming apparatus 10 may obtain a low frequency load signal including a preset low frequency from the load signal of the driving source.
  • the image forming apparatus 10 may obtain an analog signal by amplifying the low frequency load signal using an amplifier.
  • the image forming apparatus 10 may detect a reference signal by converting the analog signal to a digital signal using an ADC.
  • the image forming apparatus 10 may calculate a rotation amount of the toner supply auger based on the reference signal. For example, the image forming apparatus 10 may calculate the rotation amount of the toner supply auger based on the number of rotations of the drive transmission apparatus per period of the reference signal and the number of periods of the reference signal. As an example, the image forming apparatus 10 may calculate the rotation amount of the toner supply auger by multiplying the number of rotations of the drive transmission apparatus per period of the reference signal and the number of periods of the reference signal.
  • the image forming apparatus 10 may calculate a rotation amount of the driving source based on the number of rotations of the drive transmission apparatus per period of the reference signal and a speed reduction ratio of the driving source with respect to the drive transmission apparatus. As an example, the image forming apparatus 10 may calculate the rotation amount of the driving source by multiplying the number of rotations of the drive transmission apparatus per period of the reference signal and a speed reduction ratio of the driving source with respect to the drive transmission apparatus.
  • the image forming apparatus 10 may detect a malfunction of the driving source based on a result of identifying whether the rotation amount of the driving source satisfies a range of a reference rotation amount. For example, based on the rotation amount of the driving source being out of a preset range of the reference rotation amount, the image forming apparatus 10 may detect a malfunction of the driving source, and a user interface apparatus of the image forming apparatus 10 may display information notifying that the malfunction of the driving source has been detected.
  • the image forming apparatus 10 may control an operation of the drive transmission apparatus in the image forming apparatus 10 based on a result of identifying whether a magnitude of a load of the drive transmission apparatus satisfies a magnitude of a reference load.
  • the drive transmission apparatus may control an operation of controlling a rotation direction or rotation speed of the driving gear and an operation of stopping rotation of the driving gear. For example, based on the load of the drive transmission apparatus being within an error range of the reference load, the image forming apparatus 10 may control the driving gear of the drive transmission apparatus to rotate. In contrast, based on the load of the drive transmission apparatus being out of the error range of the reference load, the image forming apparatus 10 may stop rotation of the driving gear of the drive transmission apparatus.
  • the image forming apparatus 10 may calculate an amount of consumption of toner in a toner cartridge based on the rotation amount of the toner supply auger.
  • FIG. 12 illustrates instructions stored in a computer-readable storage medium according to an example.
  • a computer-readable storage medium 1000 may store instructions for an operation method of the image forming apparatus 10, the operation method including detecting, from a driving source, a reference signal corresponding to a load signal of a drive transmission apparatus including a driving gear having a speed reduction ratio varying based on the image forming apparatus 10 rotating a toner supply auger, and calculating a rotation amount of the toner supply auger from the reference signal.
  • the computer- readable storage medium 1000 may store instructions 1210 to rotate the toner supply auger using power transmitted from the driving source by the drive transmission apparatus including the driving gear having a variable speed reduction ratio, instructions 1220 to detect a reference signal corresponding to a load signal of the drive transmission apparatus, the load signal varying based on rotation of the toner supply auger, and instructions 1230 to calculate a rotation amount of the toner supply auger based on the reference signal.
  • the example operating method of the image forming apparatus 10 described above may be implemented in the form of a non-transitory computer- readable storage medium that stores instructions or data executable by a computer or processor.
  • the operating method of the image forming apparatus 10 described above may be written as a program that may be executed on a computer, and may be implemented in a general-purpose digital computer that operates such a program using a computer-readable storage medium.
  • Such computer-readable storage mediums may be any device capable of storing read only memory (ROM), random-access memory (RAM), flash memory, CD-ROMs, CD-Rs, CD+Rs, CD-RWs, CD+RWs, and DVD-ROMs., DVD-Rs, DVD+Rs, DVD- RWs, DVD+RWs, DVD-RAMs, BD-ROMs, BD-Rs, BD-R LTHs, BD-REs, magnetic tapes, floppy disks, magneto-optical data storage devices, a hard disk, a solid-state disk (SSD), instructions or software, associated data, data files, and data structures, and providing instructions or software, associated data, data files, and data structures to a computer such that the processor or the computer may execute an instruction.
  • ROM read only memory
  • RAM random-access memory
  • flash memory CD-ROMs, CD-Rs, CD+Rs, CD-RWs, CD+RWs, and DVD-ROMs.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Power Engineering (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Transmission Devices (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

L'invention concerne un appareil de formation d'image comprenant une source d'entraînement qui génère de l'énergie, un appareil de transmission d'entraînement destiné à faire tourner une vis d'alimentation en encre en poudre en utilisant l'énergie transmise depuis la source d'entraînement, l'appareil de transmission d'entraînement comprenant un engrenage d'entraînement ayant un rapport de réduction de vitesse variable, une unité de détection destiné à détecter, à partir de la source d'entraînement, un signal de référence correspondant à un signal de charge de l'appareil de transmission d'entraînement, le signal de charge variant en fonction de la variation du rapport de réduction de vitesse, et un processeur destiné à calculer une amplitude de rotation de la vis d'alimentation en encre en poudre, sur la base du signal de référence.
PCT/US2021/053163 2021-04-23 2021-10-01 Calcul de l'amplitude de rotation d'une vis d'alimentation en encre en poudre sur la base d'une structure dans laquelle le rapport de réduction varie WO2022225551A1 (fr)

Applications Claiming Priority (2)

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KR10-2021-0053075 2021-04-23
KR1020210053075A KR20220146156A (ko) 2021-04-23 2021-04-23 감속비가 변동되는 구조에 기초한 토너 공급 오거의 회전량 산출

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111242A (en) * 1989-09-29 1992-05-05 Kabushiki Kaisha Toshiba Image forming apparatus having a more smoothly controlled image forming element
US5452064A (en) * 1991-11-22 1995-09-19 Canon Kabushiki Kaisha Image forming apparatus having a transfer member rotatable in synchronism with a photosensitive member
US20150370196A1 (en) * 2014-06-19 2015-12-24 Ricoh Company, Ltd. Image forming apparatus
US20160349658A1 (en) * 2015-05-26 2016-12-01 Saki Izumi Image forming apparatus and charging bias adjusting method therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111242A (en) * 1989-09-29 1992-05-05 Kabushiki Kaisha Toshiba Image forming apparatus having a more smoothly controlled image forming element
US5452064A (en) * 1991-11-22 1995-09-19 Canon Kabushiki Kaisha Image forming apparatus having a transfer member rotatable in synchronism with a photosensitive member
US20150370196A1 (en) * 2014-06-19 2015-12-24 Ricoh Company, Ltd. Image forming apparatus
US20160349658A1 (en) * 2015-05-26 2016-12-01 Saki Izumi Image forming apparatus and charging bias adjusting method therefor

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