CN211554642U - Control circuit for increasing potential difference between developing roller and powder feeding roller and printer thereof - Google Patents
Control circuit for increasing potential difference between developing roller and powder feeding roller and printer thereof Download PDFInfo
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- CN211554642U CN211554642U CN202020055882.2U CN202020055882U CN211554642U CN 211554642 U CN211554642 U CN 211554642U CN 202020055882 U CN202020055882 U CN 202020055882U CN 211554642 U CN211554642 U CN 211554642U
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Abstract
The utility model discloses an increase control circuit and printer of developer roll and powder feed roller electric potential difference is applied to the powder feeding of printer, including development bias voltage circuit unit and selenium drum circuit unit, development bias voltage circuit unit sets up in the organism of printer, and development bias voltage circuit unit provides development bias voltage to selenium drum circuit unit, and selenium drum circuit unit includes developer roll and powder feed roller, and developer roll and powder feed roller's both ends are respectively through wire and circuit connection; the developing bias circuit unit is used for independently and independently providing a single developing bias for the toner cartridge circuit unit; the developing roller and the powder feeding roller in the toner cartridge circuit unit are arranged in parallel and connected with the developing bias voltage of the developing bias voltage circuit unit, and the powder feeding roller circuit is also connected in series with a voltage stabilizing diode which is used for reducing the developing bias voltage and enabling a potential difference to be formed between the developing roller and the powder feeding roller so as to facilitate the powder feeding roller to effectively feed powder.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a printer technical field especially relates to an increase control circuit and printer of developer roll and powder feed roller potential difference.
[ background of the invention ]
An electrophotographic image forming apparatus, such as a laser printer, irradiates a photosensitive drum with a predetermined electric potential by laser scanning, and forms an electrostatic latent image on the surface thereof. The electrostatic latent image is developed with predetermined toner, and the developed image is transferred to paper, and then the image obtained by transfer is fixed to be a visible image which can be observed by naked eyes, thereby realizing the conversion between image, signal and image.
In the field of imaging technology, a common laser printer is provided with a charging roller, a photosensitive drum, a laser scanning mechanism, a developing device, a transfer roller, a fixing roller and the like in a casing; as shown in FIG. 1, a charging roller 1 'charges a photoreceptor on the surface of a photoreceptor drum 3', a laser scanning device 2 'performs a light leakage process (according to data input by a controller, laser beams are irradiated on the photoreceptor drum 3' to neutralize conductive parts and form latent images), carbon particles 4 'formed by the neutralization or pulverization process are supplied to a developing roller 5' through a powder feeding roller 6 ', the latent images on the surface of the photoreceptor drum 3' are transferred to visible images through the carbon particles 4 ', in the process, a powder discharging blade 7' is used to control a charging layer of the carbon particles 4 'so that the carbon particles 4' are uniformly fixed on paper, then the carbon particles 4 'on the surface of the photoreceptor drum 3' are transferred to the paper 9 'through the charging roller 1' and a transfer roller 8 ', and the paper 9' is pressed by the carbon particles 4 The stressed pinch roller 10 ' melts and fixes the carbon powder particles 4 ' on the paper 9 ', and finally, the cleaning roller is used for cleaning the residual carbon powder particles 4 ' on the surface of the photosensitive drum 3 '.
Therefore, the existing laser printer adopts the electrostatic development principle, and the whole development process is completed by utilizing the movement of charged particles in an electric field. The utilization rate of the carbon powder for contact development is generally between 80 and 90 percent, and even then, 10 to 20 percent of the carbon powder can not be effectively utilized and becomes waste powder. The generation of waste powder causes the following problems: 1. the powder box is increased in volume, and the capacity of the waste powder bin and the capacity of the powder bin need to be increased to meet the requirement of the same page yield; 2. the development cost is increased, and compared with the powder box with the same page yield, the powder filling amount is increased; 3. the pollution to the environment is increased and the environmental protection is reduced.
Therefore, it is necessary to improve the utilization rate of the toner in the electrostatic development in view of the above problems. Under the principle of electrostatic development, the key factors influencing the development process, particularly the utilization rate of the carbon powder, comprise two aspects of carbon powder charging and electric field force. Under the condition that the charge amount of the carbon powder is constant, the amount of the carbon powder capable of moving to the surface of the developing roller is determined by the magnitude of the electric field force; the magnitude of the electric force depends on the magnitude of the developing bias voltage V1 on the surface of the developing roller and the voltage V2 on the surface of the powder feeding roller. In other words, Δ V ═ V1| - | V2| determines the magnitude of the electric force. That is, by forming an electric field between the developing roller 5 ' and the powder feeding roller 6 ', the toner is physically transported to the surface of the developing roller 5 ' and physically attached to the developing roller 5 ', and a voltage generating a necessary potential difference is applied to the developing roller 5 ' in order to develop the electrostatic latent image on the photoreceptor. Conventionally, a plurality of power supply voltages are generally provided, and when the surface potential of the photoreceptor is set to about-650V, the developing bias applied to the developing roller 5' by one power supply voltage is-350V; in addition, in order to make the carbon powder move to the developing roller 5' from the powder feeding roller 6 electrostatically and generate the voltage of the necessary polarity and electric field, a voltage of-400V to-700V, such as-650V, is applied to the powder feeding roller 4 by another power supply voltage; the power supply mode of a plurality of power supply voltages is adopted, so that the circuit structure between the developing roller 5 'and the powder feeding roller 6' of the printer is complicated, and the production cost of the printer is increased; moreover, in the originally narrow space of the printer, the complicated circuit structure is not only inconvenient for the arrangement and connection of the circuit, but also greatly reduces the reliability of the product.
[ Utility model ] content
The utility model provides a simple structure, high control circuit and printer of increase developer roll and powder feeding roller potential difference of reliability are convenient for regulate and control developer roll and send the voltage difference between the powder roller, improve the powder feeding roller and send the powder quality and send powder efficiency, effectively improve the carbon dust utilization ratio.
The utility model provides a technical scheme that its technical problem adopted is:
a control circuit for increasing the potential difference between a developing roller and a powder feeding roller is applied to powder feeding of a printer and comprises a developing bias circuit unit and a toner cartridge circuit unit, wherein the developing bias circuit unit is arranged in a printer body and provides developing bias for the toner cartridge circuit unit, the toner cartridge circuit unit comprises the developing roller and the powder feeding roller, and two ends of the developing roller and the powder feeding roller are respectively connected with a circuit through wires;
the developing bias circuit unit is used for independently and independently providing a single developing bias for the toner cartridge circuit unit;
the developing roller and the powder feeding roller in the toner cartridge circuit unit are arranged in parallel and connected with the developing bias voltage of the developing bias voltage circuit unit, and the powder feeding roller circuit is also connected in series with a voltage stabilizing diode which is used for reducing the developing bias voltage and enabling a potential difference to be formed between the developing roller and the powder feeding roller so as to facilitate the powder feeding roller to effectively feed powder.
Further, the developing bias circuit unit includes:
an alternating voltage source;
an induction element having an input coil and an output coil, connected to the alternating voltage source via the input coil, and inducing by the output coil to form an output voltage;
the two ends of the output coil are connected with a first diode for capturing a positive voltage peak value, the first diode is connected with a second diode for capturing a negative voltage peak value in series, the second diode directly outputs a developing bias voltage provided by the developing bias voltage circuit unit to the toner cartridge circuit unit, and finally the output voltage is the sum of the positive peak value output voltage and the negative peak value output voltage through the series connection principle of the first diode and the second diode.
Furthermore, the lower end of the first diode is connected to the lower end of the output coil, the upper end of the first diode is also connected to one end of a first capacitor, and the other end of the first capacitor is connected to the upper end of the output coil; the front end of the second diode is further connected to the upper end of the output coil through a first capacitor, the rear end of the second diode is further connected to one end of a second capacitor, and the other end of the second capacitor is connected to the lower end of the output coil.
Further, a third capacitor is arranged between the upper end and the lower end of the output coil.
Further, the other end of the second capacitor is also grounded.
Furthermore, the toner cartridge circuit unit further comprises a toner discharging scraper connected with the toner feeding roller in parallel, wherein the toner discharging scraper is connected to the lower end of the voltage stabilizing diode and is used for reducing development bias voltage, enabling a potential difference to be formed between the developing roller and the toner discharging scraper, facilitating the toner discharging scraper to repel the toner and improving the charge amount of toner particles on the developing roller.
Furthermore, the powder discharging scraper is connected with the powder feeding roller in parallel and then is grounded.
A printer comprises the control circuit for increasing the potential difference between the developing roller and the powder feeding roller.
The utility model has the advantages that:
the utility model discloses in, provide a single independent development bias voltage to toner cartridge circuit unit through development bias voltage circuit unit, adopt a mains voltage's power supply mode, to the narrow and small space in the printer, simplify in the printer development roller and send the circuit connection structure between the powder roller, the installation of the production technology of being convenient for effectively improves the reliability of product and reduces product manufacturing cost.
And moreover, a powder feeding roller circuit in the toner cartridge circuit unit is also connected in series with a voltage stabilizing diode for reducing development bias voltage, so that a potential difference is formed between the developing roller and the powder feeding roller, the powder feeding roller can effectively feed powder conveniently, the powder feeding quality and the powder feeding efficiency of the powder feeding roller are improved, and the utilization rate of carbon powder is effectively improved.
Meanwhile, a powder discharging scraper connected with the powder feeding roller in parallel is further arranged on the toner cartridge circuit unit and connected to the lower end of the voltage stabilizing diode, and a voltage difference is formed between the developing roller and the powder discharging scraper so as to facilitate the powder discharging scraper to repel the carbon powder and improve the charge quantity of the carbon powder particles on the developing roller; the powder discharging scraper can ensure that the electrification amount of the carbon powder is more sufficient through the friction of the carbon powder, improve the utilization rate of the carbon powder and avoid the defects of bottom ash and the like; and then improve the development quality of developer roll and save the carbon dust, realize the continuous fine control of development process, effectively improve the quality of the final printing effect of paper on the printer. And the powder discharging scraper is connected with the powder feeding roller in parallel, so that the current passing through the powder feeding roller is reduced, the charged electric charge is reduced, the amount of the carbon powder attracted in unit area is reduced, and the amount of the carbon powder transferred to the developing roller is reduced, so that the use amount of the carbon powder in unit printing area of each piece of paper is reduced on the premise of ensuring the printing quality and the reading effect, and the purposes of energy conservation and environmental protection are achieved.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a prior art configuration;
fig. 2 is a schematic circuit diagram according to a first embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a second embodiment of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it should be noted that the features in the embodiments and the embodiments of the present invention can be combined with each other without conflict. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Example one
A control circuit for increasing the potential difference between a developing roller and a powder feeding roller is applied to powder feeding of a printer as shown in figure 2 and comprises a developing bias circuit unit 1 and a toner cartridge circuit unit 2, wherein the developing bias circuit unit 1 is arranged in a machine body of the printer, the developing bias circuit unit 1 provides developing bias for the toner cartridge circuit unit 2, the toner cartridge circuit unit 2 comprises a developing roller 20 and a powder feeding roller 21, and two ends of the developing roller 20 and two ends of the powder feeding roller 21 are respectively connected with a circuit through leads.
As shown in fig. 2, the developing bias circuit unit 1 provides a single developing bias voltage for the toner cartridge circuit unit independently, the developing bias circuit unit 1 includes an alternating voltage source 3 and an inductive element 4, the inductive element 4 has an input coil 40 and an output coil 41, is connected to the alternating voltage source 3 through the input coil 40, and forms an output voltage after being induced by the output coil 41; the two ends of the output coil 41 are connected with a first diode D1 for capturing the positive peak value of the voltage, the first diode D1 is connected in series with a second diode D2 for capturing the negative peak value of the voltage, the second diode D2 directly outputs the developing bias voltage provided by the developing bias circuit unit 1 to the toner cartridge circuit unit 2, and the final output voltage is the sum of the positive peak value output voltage and the negative peak value output voltage through the series connection principle of the first diode D1 and the second diode D2.
As shown in fig. 2, the developing roller 20 and the powder feeding roller 21 in the toner cartridge circuit unit 2 are arranged in parallel and connected to the developing bias of the developing bias circuit unit 1, the powder feeding roller 21 circuit is also connected in series with a zener diode 22 for reducing the developing bias so that a potential difference is formed between the developing roller 20 and the powder feeding roller 21 to facilitate the effective powder feeding of the powder feeding roller, and the rear end of the powder feeding roller 21 is grounded.
As shown in fig. 2, the lower end of the first diode D1 is connected to the lower end of the output coil 41, the upper end of the first diode D1 is also connected to one end of a first capacitor C1, and the other end of the first capacitor C1 is connected to the upper end of the output coil 41; the front end of the second diode pair is further connected to the upper end of the output coil 41 through a first capacitor C1, the rear end of the second diode D2 is further connected to one end of a second capacitor C2, and the other end of the second capacitor C2 is connected to the lower end of the output coil 41 and grounded; a third capacitor C3 is also provided between the upper and lower ends of the output coil 41.
The developing bias circuit unit provides a single independent developing bias for the toner cartridge circuit unit, a power supply mode of a power supply voltage is adopted, and the circuit connection structure between the developing roller 20 and the powder feeding roller 21 in the printer is simplified aiming at a narrow space in the printer, so that the installation of the production process is facilitated, the reliability of the product is effectively improved, and the production cost of the product is reduced. Moreover, a voltage stabilizing diode 22 for reducing development bias voltage is also connected in series with the circuit of the powder feeding roller 21 in the toner cartridge circuit unit 2, so that a potential difference is formed between the developing roller 20 and the powder feeding roller 21, which is convenient for the powder feeding roller 21 to effectively feed powder, improves the powder feeding quality and the powder feeding efficiency of the powder feeding roller 21, and effectively improves the utilization rate of carbon powder.
Example two
As shown in fig. 3, the difference between the first embodiment and the second embodiment is that the toner cartridge circuit unit 2 further includes a toner discharge scraper 23 connected in parallel with the toner feeding roller 21, the toner discharge scraper 23 is connected in parallel with the toner feeding roller 21 and then grounded, and the toner discharge scraper 23 is connected to the lower end of the zener diode 22 to form a potential difference between the developing roller 20 and the toner discharge scraper 23, so that the toner discharge scraper 23 repels toner and the toner particle charging amount on the developing roller 20 is increased, thereby further increasing the developing quality of the developing roller 20 and saving toner, realizing continuous fine control of the developing process, and effectively increasing the quality of the final printing effect of paper on a printer. The potential of the powder discharging scraper 23 is lower than that of the developing roller 20, so that carbon powder can be repelled, the carbon powder can be prevented from being adhered to the surface of the powder discharging scraper 23 in the printing process, and the carbon powder can be prevented from flying; the powder discharging scraper 23 can ensure that the electrification amount of the carbon powder is more sufficient by rubbing the carbon powder, improve the utilization rate of the carbon powder and avoid the defects of bottom ash and the like; further improving the developing quality of the developing roller 20 and saving carbon powder, realizing continuous and fine control of the developing process and effectively improving the quality of the final printing effect of paper on the printer.
Meanwhile, the powder discharging scraper 23 and the powder feeding roller 21 are connected in parallel, so that the current passing through the powder feeding roller 21 is reduced, the electric charge is reduced, the amount of the carbon powder attracted in a unit area is reduced, and the amount of the carbon powder transferred to the developing roller 20 is reduced, so that the use amount of the carbon powder in the unit printing area of each piece of paper is reduced on the premise of ensuring the printing quality and the reading effect, and the purposes of energy conservation and environmental protection are achieved.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
The above-mentioned embodiments are only preferred embodiments of the present invention, not limiting the scope of the present invention, and all equivalent changes made by the shape, structure and principle of the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. A control circuit for increasing the potential difference between a developing roller and a powder feeding roller is applied to powder feeding of a printer and comprises a developing bias circuit unit and a toner cartridge circuit unit, wherein the developing bias circuit unit is arranged in a printer body and provides developing bias for the toner cartridge circuit unit, the toner cartridge circuit unit comprises the developing roller and the powder feeding roller, and two ends of the developing roller and the powder feeding roller are respectively connected with a circuit through wires; the method is characterized in that:
the developing bias circuit unit is used for independently and independently providing a single developing bias for the toner cartridge circuit unit;
the developing roller and the powder feeding roller in the toner cartridge circuit unit are arranged in parallel and connected with the developing bias voltage of the developing bias voltage circuit unit, and the powder feeding roller circuit is also connected in series with a voltage stabilizing diode which is used for reducing the developing bias voltage and enabling a potential difference to be formed between the developing roller and the powder feeding roller so as to facilitate the powder feeding roller to effectively feed powder.
2. The control circuit for increasing the potential difference between the developing roller and the powder feeding roller according to claim 1, wherein: the developing bias circuit unit includes:
an alternating voltage source;
an induction element having an input coil and an output coil, connected to the alternating voltage source via the input coil, and inducing by the output coil to form an output voltage;
the two ends of the output coil are connected with a first diode for capturing a positive voltage peak value, the first diode is connected with a second diode for capturing a negative voltage peak value in series, the second diode directly outputs a developing bias voltage provided by the developing bias voltage circuit unit to the toner cartridge circuit unit, and finally the output voltage is the sum of the positive peak value output voltage and the negative peak value output voltage through the series connection principle of the first diode and the second diode.
3. The control circuit for increasing the potential difference between the developing roller and the powder feeding roller according to claim 2, wherein: the lower end of the first diode is connected with the lower end of the output coil, the upper end of the first diode is also connected with one end of a first capacitor, and the other end of the first capacitor is connected with the upper end of the output coil; the front end of the second diode is further connected to the upper end of the output coil through a first capacitor, the rear end of the second diode is further connected to one end of a second capacitor, and the other end of the second capacitor is connected to the lower end of the output coil.
4. The control circuit for increasing the potential difference between the developing roller and the powder feeding roller according to claim 2, wherein: and a third capacitor is also arranged between the upper end and the lower end of the output coil.
5. The control circuit for increasing the potential difference between the developing roller and the powder feeding roller according to claim 3, wherein: the other end of the second capacitor is also grounded.
6. The control circuit for increasing the potential difference between the developing roller and the powder feeding roller according to claim 1, wherein: the toner cartridge circuit unit further comprises a toner discharging scraper connected with the toner feeding roller in parallel, and the toner discharging scraper is connected to the lower end of the voltage stabilizing diode and is used for reducing development bias voltage, enabling a potential difference to be formed between the developing roller and the toner discharging scraper, facilitating the toner discharging scraper to repel carbon toner and improving the charge quantity of carbon toner particles on the developing roller.
7. The control circuit for increasing the potential difference between the developing roller and the powder feeding roller according to claim 6, wherein: the powder discharging scraper is connected with the powder feeding roller in parallel and then is grounded.
8. A printer comprising the control circuit for increasing a potential difference between a developing roller and a powder feed roller according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055882.2U CN211554642U (en) | 2020-01-10 | 2020-01-10 | Control circuit for increasing potential difference between developing roller and powder feeding roller and printer thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055882.2U CN211554642U (en) | 2020-01-10 | 2020-01-10 | Control circuit for increasing potential difference between developing roller and powder feeding roller and printer thereof |
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| Publication Number | Publication Date |
|---|---|
| CN211554642U true CN211554642U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020055882.2U Active CN211554642U (en) | 2020-01-10 | 2020-01-10 | Control circuit for increasing potential difference between developing roller and powder feeding roller and printer thereof |
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| Country | Link |
|---|---|
| CN (1) | CN211554642U (en) |
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