WO2014101680A1 - 处理盒及处理盒改装方法 - Google Patents

处理盒及处理盒改装方法 Download PDF

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Publication number
WO2014101680A1
WO2014101680A1 PCT/CN2013/089569 CN2013089569W WO2014101680A1 WO 2014101680 A1 WO2014101680 A1 WO 2014101680A1 CN 2013089569 W CN2013089569 W CN 2013089569W WO 2014101680 A1 WO2014101680 A1 WO 2014101680A1
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Prior art keywords
terminal
electrically connected
voltage stabilizing
circuit
capacitor
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PCT/CN2013/089569
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English (en)
French (fr)
Inventor
杨晓锋
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珠海天威飞马打印耗材有限公司
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Publication of WO2014101680A1 publication Critical patent/WO2014101680A1/zh

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    • 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
    • G03G21/1803—Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1814—Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing
    • 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
    • G03G15/065—Arrangements for controlling the potential of the developing electrode
    • 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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
    • G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
    • G03G15/1675—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer with means for controlling the bias applied in the transfer nip

Definitions

  • the present invention relates to a process cartridge for an image forming apparatus and a retrofitting method for converting an existing process cartridge into such a process cartridge.
  • the present application is based on a Chinese patent application filed on Dec. 28, 2012, filed on Jan. 28, 2012, the content of which is hereby incorporated by reference.
  • An image forming apparatus is an apparatus for forming an image on a recording material using an electrophotographic image forming apparatus, and the image forming apparatus includes a copying machine, a printer, a facsimile machine, and the like.
  • the process cartridge used in the image forming apparatus is a unit cartridge including at least a developing roller as a developing device and a photosensitive drum, and the process cartridge is detachably mounted in the main body of the image forming apparatus.
  • a typical image imaging device is a laser printer.
  • Laser printer is one of the most widely used image imaging devices. Laser printers use the physical, chemical principles of light, electricity and heat to output text or images on paper and other media. Can be divided into charging, exposure, development, transfer, fixing, cleaning, power reduction seven steps.
  • Fig. 1 is a schematic view showing the basic working process of the printer, wherein the dotted line frame is a process cartridge installed in the printer.
  • the surface of the photosensitive drum 3 is uniformly charged on the surface by the charging roller 2, and the laser scanner LED emits a modulated laser light containing image information to the photosensitive drum 3, and static electricity corresponding to the image to be copied is formed on the surface of the photosensitive drum 3.
  • Latent image the toner from the developing roller 4 is adsorbed on the surface of the photosensitive drum 3 to convert the electrostatic latent image into a visible image, and as the photosensitive drum 3 rotates, the visible image formed by the toner on the surface of the photosensitive drum 3 is transposed.
  • the transfer roller 13 is a schematic view showing the basic working process of the printer, wherein the dotted line frame is a process cartridge installed in the printer.
  • the transfer roller 13 transfers the visible image onto a recording medium such as paper, and the heated roller 11 and the pressure roller 12 can heat and press the image on the medium, and the toner is heated.
  • the formed visible image is completely cured on the recording medium, which is the basic imaging process of the laser printer.
  • the toner on the developing roller 4 adsorbs the toner stored in the powder magazine 6 through the powder feeding roller 5, and the powder discharging blade 7 has a function of controlling the layer thickness of the developing roller 4, and the cleaning blade 9 is used for scraping
  • the residual toner on the surface of the photosensitive drum 3 is dropped, and the residual toner is dropped into the waste toner box 8, and the charging roller 2 also has a function of eliminating the residual potential on the surface of the photosensitive drum 3.
  • the innermost layer of the charging roller 2 is a metal shaft, and the electrical contacts of the circuit board of the laser printer 1 are electrically connected to the metal shaft contact point of the charging roller 2, the photosensitive drum 3 is grounded, and the developing roller 4 and the powder feeding roller 5 are electrically conductive.
  • the sheet is electrically connected to the circuit board of the laser printer 1, and the laser printer 1 supplies a developing bias to the developing roller 4 and the powder feeding roller 5.
  • FIG. 3 is a waveform of the developing bias voltage outputted by the laser printer.
  • the development bias output from the laser printer to the conductive sheet contains the AC component and the DC component.
  • Figure 4 shows the development bias of the AC-DC superimposed output by the laser printer. Waveform diagram.
  • the alternating component in the developing bias causes the toner to jump back and forth between the developing roller and the photosensitive drum, so that the toner is charged more uniformly, and the direct current component in the developing bias provides an electric field force, so that the toner can sufficiently participate in development.
  • the laser printer also provides a negative bias to the powder feeding roller, so that the carbon powder is sufficiently negatively charged during the friction process, which is favorable for subsequent development.
  • the toner at the edge of the development region easily jumps to other places, which is disadvantageous for development. Moreover, the amount of toner consumed in the printing process is large, and the printing cost is high. Further, since the same voltage is applied to the developing roller 4 and the powder feeding roller 5, it is disadvantageous that the toner is transferred from the powder feeding roller 5 to the developing roller 4, resulting in unstable printing quality.
  • the Chinese patent publication No. CN102411297A discloses an invention called "Processing Box and Process Box Modification Method", which processes a DC component containing AC component supplied by a laser printer through an electronic module to form a DC with a negative voltage.
  • the negative voltage DC is supplied to the developing roller to realize the voltage required for the contact developing mode, thereby saving printing cost.
  • the invention only uses a DC voltage of a DC voltage containing a DC component to be supplied to a developing roller, and the powder feeding roller does not supply power, which is disadvantageous for charging the toner and efficiently transferring the toner from the powder feeding roller to the developing roller. On the roller.
  • the laser printer has a structure that matches it.
  • the power supply module provided in the matching laser printer supplies the developing roller and the powder feeding roller only to contain a negative bias of the direct current component.
  • the power module provided in the matching laser printer supplies a negative bias of the developing roller and the powder feed roller including DC and AC components.
  • a primary object of the present invention is to provide a process cartridge which can be used in a laser printer which can replace the skip development and control-convert the voltage of the developing device and the powder feed roller.
  • Another object of the present invention is to provide a process cartridge retrofitting method for converting a development mode from skip development to contact development.
  • the present invention provides a process cartridge including a photosensitive drum, a developing device, and a powder feeding roller. One end of the photosensitive drum is grounded, wherein the photosensitive drum and the developing device are in axial contact, and the process cartridge further includes an electronic module.
  • the electronic module comprises: a first terminal receiving a power supply signal output by the laser printer; a second terminal electrically connected to the photosensitive drum; a third terminal outputting a developing bias signal to the developing device; and a fourth terminal, and feeding the powder Roller electrical connection; rectifier circuit, rectifier circuit has a diode, the cathode of the diode is electrically connected to the first terminal, the anode of the diode is outputted by the rectifier circuit, and the filter circuit, the first end of the filter circuit receives the electricity after the rectifier circuit is rectified a signal, the second end of the filter circuit is electrically connected to the second terminal; the first voltage stabilizing circuit, the input end of the first voltage stabilizing circuit receives the electrical signal outputted by the rectifier circuit, and the ground terminal and the second terminal of the first voltage stabilizing circuit Electrical connection, the output end of the first voltage stabilizing circuit is electrically connected to the third terminal; the second voltage stabilizing circuit, the input end of the second voltage stabilizing circuit receives the whole The electrical signal outputted by the
  • the first voltage stabilizing circuit has a first resistor, a first Zener diode and a second capacitor, the first end of the first resistor is electrically connected to the anode of the diode, and the second end of the first resistor is electrically connected to the second capacitor The first end is connected to the anode of the first Zener diode, the second end of the second capacitor is electrically connected to the cathode of the first Zener diode and the second terminal, and the second end of the first resistor is also electrically connected to the third connecting wire end.
  • the second voltage stabilizing circuit has a second resistor, a second Zener diode and a third capacitor, the first end of the second resistor is electrically connected to the anode of the diode, and the second end of the second resistor is electrically connected to the third capacitor
  • the first end and the anode of the second Zener diode, the second end of the third capacitor is electrically connected to the cathode of the second Zener diode and the second terminal, and the second end of the second resistor is also electrically connected to the fourth terminal .
  • Another object of the present invention is to provide a process cartridge modification method comprising a photosensitive drum, a developing device and a powder feeding roller, one end of the photosensitive drum being grounded, wherein the photosensitive drum and the developing device are in axial contact, in the process cartridge
  • An electronic module is further included, the electronic module includes: a first terminal receiving a power supply signal output by the laser printer; a second terminal electrically connected to the photosensitive drum; and a third terminal outputting a developing bias signal to the developing device; the fourth wiring The end is connected with the powder feeding roller; the rectifier circuit has a diode, the cathode of the diode is electrically connected to the first terminal, the anode of the diode outputs the signal of the rectifier circuit; the filter circuit, one end of the filter circuit receives the electricity generated by the rectifier circuit after rectification The signal, the first end of the filter circuit is electrically connected to the second terminal; the first voltage stabilizing circuit, the input end of the first voltage stabilizing circuit receives the electrical signal outputted by
  • the diode of the rectifier circuit of the electronic module rectifies the negative bias voltage containing the AC component into a current containing only the DC component, and further ensures that the waveform of the electrical component of the DC component is stable by the filter circuit, and then respectively Outputting electrical signals of different voltage values to the developing device and the powder feeding roller through the output end of the first voltage stabilizing circuit and the output end of the second voltage stabilizing circuit, and realizing the developing device and the powder feeding roller by using two different voltage stabilizing circuits
  • the negative bias is controlled, and the absolute value of the negative bias of the output developing device is smaller than the absolute value of the negative bias of the output powder feeding roller, so that the negatively charged toner is more efficiently transferred from the charging roller to the developing device, thereby improving Print quality.
  • the process cartridge realizes the development bias of the laser printer to convert the AC and DC developing bias into a constant negative value, and supplies it to the developing device for contact development, thereby reducing the printing effect. Printing costs reduce pollution to the environment.
  • the stable voltage value outputted by the first voltage stabilizing circuit depends on the voltage regulator value of the first Zener diode, and the use of the Zener diode as a voltage stabilizing device makes the control of the output voltage easier to control and reduces the cost of the voltage stabilizing device.
  • the capacitor is connected in parallel with the Zener diode, and the capacitor can effectively prevent the unconnected noise disturbance and eliminate the fluctuation of the low frequency voltage.
  • the second voltage stabilizing circuit is identical in structure to the first voltage stabilizing circuit, but since the voltage regulator value of the second Zener diode is different from the voltage regulator value of the first Zener diode, the output voltage value is different, and the capacitor is also effective. Prevents external noise disturbances and eliminates fluctuations in low frequency voltages.
  • the modification method of the process cartridge provided by the invention can modify the contact development cartridge to replace the jump development and install into the laser printer, and electrically connect the first terminal of the electronic module with the printer power supply module, and the second terminal and the second terminal
  • the photosensitive drum is electrically connected, the third terminal is in contact with the developing device, and the fourth terminal is in contact with the powder feeding roller, and the modification method is practical and simple, and is easy to connect.
  • Figure 1 is a schematic diagram of the basic printing in a laser printer.
  • Figure 2 is an electrical schematic diagram of a portion of a laser printer and process cartridge.
  • Figure 3 is a waveform diagram of the developing bias of the printer for the process cartridge in the contact type developing mode.
  • Figure 4 is a waveform diagram of the developing bias of the printer for the process cartridge in the skip development mode.
  • Figure 5 is an electrical schematic diagram of an embodiment of a process cartridge of the present invention.
  • Figure 6 is a schematic diagram of an electronic module in an embodiment of the process cartridge of the present invention.
  • Figure 7 is a waveform diagram of the developing bias voltage after the rectification circuit of the electronic module of the embodiment of the process cartridge of the present invention rectifies the developing bias of the jump development provided by the laser printer.
  • Figure 8 is a waveform diagram showing the output voltage signals of the terminal T3 and the T4 terminal of the electronic module in the embodiment of the process cartridge of the present invention.
  • the electrical connection structure of the embodiment of the process cartridge of the present invention is as shown in FIG. 5.
  • the process cartridge includes a photosensitive drum 30, a developing roller 40, and a powder feeding roller 50.
  • One end of the photosensitive drum 30 is grounded, and the charging roller 20 is electrically connected to the laser printer 25.
  • the photosensitive drum 30 and the developing roller 40 are in axial contact, and the process cartridge further includes an electronic module 26.
  • the electronic module 26 includes four terminals T1, T2, T3, and T4, wherein the first terminal T1 receives a power supply signal from the laser printer 25, and second
  • the terminal T2 is electrically connected to the conductive sheet of the photosensitive drum 30, the third terminal T3 is electrically connected to the developing roller 40 and outputs a developing bias signal, and the fourth terminal T4 is electrically connected to the powder feeding roller 50 and negatively biased to the output thereof.
  • the laser printer 25 also outputs an electric signal to the charging roller 20 to charge the charging roller 20.
  • the electronic module 26 further includes a rectifier circuit, a filter circuit, a first voltage stabilization circuit and a second voltage stabilization circuit, wherein the rectifier circuit is a diode D1, the cathode of the diode D1 is electrically connected to the first terminal T1, and the anode output of the diode D1 is rectified. Power supply signal.
  • the filter circuit is a capacitor C3.
  • the first end of the capacitor C3 is electrically connected to the anode of the diode D1 and receives the power supply signal after the diode D1 is rectified.
  • the second end of the capacitor C3 is connected to the second terminal T2.
  • the first voltage stabilizing circuit is composed of a resistor R1, a Zener diode ZD1 and a capacitor C1.
  • the first end of the resistor R1 is electrically connected to the anode of the diode D1 and receives an electrical signal outputted by the diode D1, and the second end of the resistor R1 is electrically connected.
  • the second end of the resistor R1 is also electrically connected to the first end of the capacitor C1
  • the cathode of the Zener diode ZD1 is electrically connected to the second end of the capacitor C1 and the second terminal T2, and the resistor R1
  • the second end is also electrically connected to the third terminal T3 to output a regulated electrical signal.
  • the second voltage stabilizing circuit is composed of a resistor R2, a Zener diode ZD2, and a capacitor C2.
  • the first end of the resistor R2 is electrically connected to the anode of the diode D1 and receives an electrical signal outputted by the diode D1, and the second end of the resistor R2 is electrically connected.
  • the second end of the resistor R2 is also electrically connected to the first end of the capacitor C2
  • the cathode of the Zener diode ZD2 is electrically connected to the second end of the capacitor C2 and the second terminal T2, the resistor R2
  • the second end is also electrically connected to the third terminal T4 to output a regulated electrical signal.
  • the waveform of the power supply signal output by the laser printer of the skip development mode is as shown in FIG. 4, and the waveform is an AC signal waveform containing a DC component, and when the AC power of the DC component is input to the first terminal T1 of the electronic module 26,
  • the diode D1 of the rectifier circuit rectifies the power supply signal. Since the cathode of the diode D1 is connected to the first terminal T1, the positive half cycle current of the alternating current containing the direct current component cannot pass through the diode D1, and the negative half cycle of the alternating current containing the direct current component can
  • the current output by the diode D1 after rectifying the power supply signal through the diode D1 is as shown in FIG.
  • the capacitor C3 of the filter circuit filters the rectified current as shown in FIG. 7.
  • the capacitor C3 stores electricity when the current is a negative voltage, and discharges when the current is 0 volts. In this way, the rectified current is filled with a peak. The gentle negative current is filtered out and the next step is regulated.
  • the filtered current flows into the voltage stabilizing circuit, and the voltage of the Zener diode is maintained at both ends of the Zener diodes ZD1 and ZD2, so the third terminal T3 and the fourth terminal T4 are respectively connected to the Zener diode ZD1.
  • the anode point of ZD2 is connected, and the voltage regulator diodes ZD1 and ZD2 output the voltage regulators of Zener diodes ZD1 and ZD2 at the anode. Since the cathodes of the Zener diodes ZD1 and ZD2 are grounded through the second terminal T2, the output voltage regulation value is lower than 0 volts, and the functions of the capacitors C1 and C2 are effective to prevent external noise disturbance and eliminate low frequency.
  • the fluctuation of the voltage provides a more stable direct current to the developing roller 40 and the powder feeding roller 50.
  • the conductive sheet of the photosensitive drum 30 is grounded, which corresponds to a zero potential, the negatively charged toner is transferred to the photosensitive drum 30 by the electric field force.
  • the toner transfer between the developing roller 40 and the powder feeding roller 50 is applied by this principle, and thus development is required.
  • the potential of the roller 40 is lower than the potential of the powder feeding roller 50, which is advantageous for the negatively charged toner to be transferred to the developing roller 40 by the powder feeding roller 50 by using the electric field force.
  • the first voltage stabilizing circuit is required to be output to the developing roller.
  • the absolute value of the voltage value of the roller 40 is smaller than the absolute value of the voltage value outputted from the second voltage stabilizing circuit to the powder feed roller 50.
  • the voltage regulator circuit uses a Zener diode ZD1 and a Zener diode ZD2 with different voltage regulator values, and the voltage regulator diode ZD1 has a lower regulation voltage than the Zener diode ZD2.
  • the waveform of the electric signal output from the Zener diode ZD1 to the third terminal T3 and the waveform of the electric signal output from the Zener diode ZD2 to the fourth terminal T4 are as shown in FIG. 8, so that the voltage value output to the developing roller is The absolute value will be less than the absolute value of the voltage value output to the powder feed roller, so that the negatively charged toner is better transferred to the developing roller by the powder feeding roller using the electric field force.
  • the electronic module of the processing box is used to convert the DC component containing the DC component of the laser printer into a stable DC power of less than 0 volts, and the DC power of less than 0 volts is passed through different voltage stabilizing circuits. It is turned into two direct currents with different voltage values, and then sent to the developing roller and the powder feeding roller respectively, thereby realizing a process cartridge installation which can replace the skip development and control the conversion of the voltage of the developing device and the powder feeding roller.
  • a process cartridge used in a laser printer to improve print quality, save costs, and protect the environment.
  • the existing processing box is modified, and the processing box before the modification is a processing box for jumping development, which comprises a charging roller, a photosensitive drum, a developing roller, a powder feeding roller, etc., the photosensitive drum is grounded, the photosensitive drum and the developing roller There is a certain gap between them.
  • the photosensitive drum and the developing roller are changed to be in contact with the axis, that is, the center distance between the photosensitive drum and the developing roller which are originally separated by a certain gap is adjusted to be small, so that the gap between the photosensitive drum and the developing roller can be adjusted by adjusting the mounting position of the photosensitive drum and the developing roller.
  • the electronic module has the structure of the electronic module as described in the embodiment of the processing box of FIG. 6, and the output point and the developing roller for electrically connecting with the power supply of the printer in the original processing box. Disconnect the circuit between the powder feeding roller and connect the terminal T1 of the electronic module to the power supply of the printer power supply. Connect the terminal T2 to the photosensitive drum, connect the terminal T3 to the photosensitive drum, and connect the terminal T4 with the terminal. Powder roller connection.
  • the modified process cartridge of the present invention is installed in a laser printer which should be equipped with a skip type development process cartridge, and the laser printer supplies a development bias signal of an alternating current containing a direct current component, and the development bias is outputted by the electronic module to output a negative direct current It is pressed and loaded on the developing roller and the powder feeding roller to bring the developing roller into contact with the photosensitive drum along the axis, thereby realizing the working mode of contact development.
  • Contact development has an excellent print quality, improves print quality, saves printing costs, and reduces environmental pollution.
  • the present invention is not limited to the above embodiments, such as changes in the rectifier circuit, the filter circuit, or the voltage regulator circuit in the electronic module, and for example, the second terminal T2 is directly connected to the photosensitive drum and is directly grounded. It is intended to be included within the scope of the appended claims.

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  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Developing For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

一种处理盒，包括感光鼓（30）、显影器件（40）、送粉辊（50）和电子模块（26）。其中，感光鼓（30）和显影器件（40）沿轴向接触，电子模块（26）包括对经过滤波后的电信号经过稳压继而输出到显影器件（40）的第一稳压电路和对经过滤波后的电信号经过稳压继而输出到送粉辊（50）的第二稳压电路，第一稳压电路输出电压值的绝对值小于第二稳压电路输出电压值的绝对值。

Description

处理盒及处理盒改装方法 技术领域
本发明涉及一种用于图像成像设备的处理盒及将现有处理盒改装成这种处理盒的改装方法。本申请是基于申请日为2012年12月28日，申请号为CN201210585569.X的中国发明专利申请，该申请的内容引入本文作为参考。
 背景技术
图像成像设备是一种利用电子照相成像原理在记录材料上形成图像的设备，图像成像设备包括复印机、打印机、传真机等。在图像成像设备中使用的处理盒是一个至少包括作为显影装置的显影辊和感光鼓的单元盒，处理盒以可拆卸地方式安装到图像成像设备的主体中。
一个典型的图像成像设备是激光打印机，激光打印机是目前最广泛的图像成像设备之一，激光打印机利用光、电、热的物理、化学原理在纸张等介质上输出文字或者图像，其基本工作过程可分为充电、曝光、显影、转印、定影、清洁、消电七个步骤。
参照图1，图1为反映打印机基本工作过程的示意图，其中虚线框内为安装在打印机中的处理盒。执行打印工作时，感光鼓3表面由充电辊2在表面均匀地充电，激光扫描器LED向感光鼓3发射含有图像信息的经过调制的激光，在感光鼓3表面形成与待复制图像对应的静电潜像。然后，来自显影辊4的碳粉转而吸附在感光鼓3表面上使静电潜像转成可视图像，随着感光鼓3的旋转，碳粉在感光鼓3表面形成的可视图像换位至转印辊13。最后，转印辊13在转印电压的作用下，可视图像转印至纸张等记录介质上，经过加热辊11、加压辊12对介质上的可使图像的加热、加压，碳粉形成的可视图像完全固化于记录介质上，这就是激光打印机的基本成像过程。
处理盒中，显影辊4上的碳粉是经过送粉辊5吸附存储在粉仓6的碳粉，出粉刮刀7具有控制显影辊4的分层厚度的作用，清洁刮刀9用于将刮掉感光鼓3表面残余碳粉，残余碳粉掉落废粉仓8，充电辊2还具有消除感光鼓3表面残余电位的作用。
参照图2，充电辊2最内层为金属轴，激光打印机1电路板的电触点与充电辊2金属轴接触点电连接，感光鼓3接地，而显影辊4和送粉辊5的导电片与激光打印机1电路板电连接，激光打印机1为显影辊4和送粉辊5提供显影偏压。
在接触式显影方式中，显影辊4与感光鼓3之间没有空隙，相互接触。激光打印机向导电片输出的显影偏压只包含直流分量，且该直流分量为低于0伏的电压，图3所示的是激光打印机所输出的显影偏压波形图。这样，碳粉不会在显影辊与感光鼓之间跳动，因此碳粉在电场力的作用下直接转移到感光鼓的表面，这样的显影方式消耗的碳粉量较小，打印成本较低。
在非磁性跳跃式显影中，显影辊与感光鼓之间存在一定空隙，一般15至22微米，两者间不接触，带有电性的碳粉参与显影要跳跃到感光鼓上去。在磁性跳跃式显影中，磁辊和感光鼓之间存在一定空隙，一般约26至36微米，两者间不接触，同时带有磁性和电性的碳粉参与显影要跳跃到感光鼓上去。无论是非磁性跳跃式显影还是磁性跳跃式显影，激光打印机向导电片输出的显影偏压均包含交流分量以及直流分量，图4所示的是激光打印机所输出的交直流叠加后的显影偏压的波形图。
显影偏压中的交流分量使得碳粉在显影辊与感光鼓之间来回跳动，使得碳粉带电更加均匀，显影偏压中的直流分量提供电场力，使碳粉能充分地参与显影。同时，激光打印机还向送粉辊提供负偏压，这样使得碳粉在摩擦过程中充分的使碳粉带上负电，有利于后续的显影。
 技术问题
然而，上述的显影方式中，在显影区域边缘处的碳粉容易跳跃到其他地方，不利于显影。而且打印过程中消耗的碳粉量较大，打印成本较高。并且，由于向显影辊4和送粉辊5施加相同的电压，不利于碳粉由送粉辊5向显影辊4转移，造成打印的品质不稳定。
公开号为CN102411297A的中国专利发明公开了一种名为“处理盒及处理盒改装方法”的发明创造，该处理盒将激光打印机供给的含有直流成分的交流电经过电子模块处理后形成负电压的直流，该负电压的直流再供给显影辊使用，从而实现接触式显影方式需要的电压，节省了打印成本。但是，该发明只是将含有直流成分的交流电经过处理的负电压的直流供给显影辊使用，送粉辊并没有给予供电，不利于让碳粉带电和让碳粉从送粉辊有效的传送到显影辊上。
通常，根据处理盒的显影方式不同，激光打印机具有与之匹配的结构。对于接触式显影方式的处理盒，与之匹配的激光打印机内所设置的电源模块供给显影辊和送粉辊只包含有直流分量的负偏压。对于跳跃式显影方式的处理盒，与之匹配的激光打印机内所设置的电源模块供给显影辊和送粉辊的包含有直流和交流分量的负偏压。
 技术解决方案
本发明的主要目的是提供一种可替换跳跃式显影且对显影器件和送粉辊的电压进行控制转换的处理盒安装在激光打印机中使用的处理盒。
本发明的另一目的是提供一种将显影方式由跳跃式显影改装为接触式显影的处理盒改装方法。
为了实现上述的主要目的，本发明提供的处理盒，包括感光鼓、显影器件及送粉辊，感光鼓的一端接地，其中，感光鼓和显影器件沿轴向接触，处理盒还包括电子模块，电子模块包括：第一接线端，接收激光打印机输出的供电信号；第二接线端，与感光鼓电连接；第三接线端，向显影器件输出显影偏压信号；第四接线端，与送粉辊电连接；整流电路，整流电路具有二极管，二极管的阴极电连接第一接线端，二极管的阳极输出整流电路整流后的信号；滤波电路，滤波电路的第一端接收整流电路整流后发出的电信号，滤波电路的第二端与第二接线端电连接；第一稳压电路，第一稳压电路输入端接收整流电路整输出的电信号，第一稳压电路接地端与第二接线端电连接，第一稳压电路输出端与第三接线端电连接；第二稳压电路，第二稳压电路输入端接收整流电路输出的电信号，第二稳压电路接地端与第二接线端电连接，第二稳压电路输出端与第四接线端电连接；第一稳压电路输出电压值的绝对值小于第二稳压电路输出电压值的绝对值。
更进一步的方案是第一稳压电路具有第一电阻、第一稳压二极管和第二电容，第一电阻的第一端电连接二极管的阳极，第一电阻的第二端电连接第二电容的第一端和第一稳压二极管的阳极，第二电容的第二端电连接第一稳压二极管的阴极和第二接线端，第一电阻的第二端还电连接于第三接电线端。
更进一步的方案是第二稳压电路具有第二电阻、第二稳压二极管和第三电容，第二电阻的第一端电连接二极管的阳极，第二电阻的第二端电连接第三电容的第一端和第二稳压二极管的阳极，第三电容的第二端电连接第二稳压二极管的阴极和第二接线端，第二电阻的第二端还电连接于第四接线端。
为了实现上述的另一目的本发明提供的处理盒改装方法，包括感光鼓、显影器件及送粉辊，感光鼓的一端接地，其中，感光鼓和显影器件沿轴向接触，在所述处理盒内增设电子模块，电子模块包括：第一接线端，接收激光打印机输出的供电信号；第二接线端，与感光鼓电连接；第三接线端，向显影器件输出显影偏压信号；第四接线端，与送粉辊连接；整流电路，整流电路具有二极管，二极管的阴极电连接第一接线端，二极管的阳极输出整流电路的信号；滤波电路，滤波电路的一端接收整流电路整流后发出的电信号，滤波电路的第一端与第二接线端电连接；第一稳压电路，第一稳压电路输入端接收整流电路整输出的电信号，第一稳压电路接地端与第二接线端电连接，第一稳压电路输出端与第三接线端电连接；第二稳压电路，第二稳压电路输入端接收整流电路输出的电信号，第二稳压电路接地端与第二接线端电连接，第二稳压电路输出端与第四接线端电连接，第一稳压电路输出电压值的绝对值小于第二稳压电路输出电压值的绝对值；增设电子模块后，将第一接线端连接至激光打印机的供电模块，将第二接线端电连接至感光鼓，将第三接线端连接至显影器件，将第四接线端电连接至送粉辊。
 有益效果
应用本发明提供的处理盒，电子模块的整流电路的二极管将含有交流分量的负偏压整流成只含有直流分量的电流，而通过滤波电路进一步保证该直流分量的电信号的波形平稳，继而分别通过第一稳压电路的输出端和第二稳压电路的输出端向显影器件和送粉辊输出不同电压值的电信号，利用两个不同的稳压电路对显影器件和送粉辊实现对其负偏压的控制，而且输出显影器件的负偏压的绝对值小于输出送粉辊的负偏压的绝对值，这样带负电的碳粉更加有效从充电辊传送到显影器件上，从而提高打印品质。
并且，处理盒实现了将激光打印机给的还有交、直流的显影偏压转化成恒定负值的显影偏压，输送给显影器件，以进行接触式显影，使得打印效果理想的前提下降低了打印成本，对环境产生的污染减轻。
此外，第一稳压电路输出的稳定电压值取决于第一稳压二极管的稳压值，采用稳压二极管作为稳压器件使得在输出电压的控制更为容易控制，减少稳压器件的成本，同时用电容并联与稳压二极管，电容可以有效的防治未接噪声扰动并且消除低频电压的波动。
并且，第二稳压电路与第一稳压电路结构上相同，但是由于第二稳压二极管的稳压值不同于第一稳压二极管的稳压值，所以输出电压值不同，电容同样也是有效的防治外界噪声扰动并且消除低频电压的波动。
本发明提供的处理盒的改装方法可以将接触式显影的处理盒改装后替代跳跃式显影的安装到激光打印机中，将电子模块的第一接线端与打印机供电模块电连接，第二接线端与感光鼓电连接，第三接线端与显影器件接触，第四接线端与送粉辊接触，改装方法实用简单，易于连接。
 附图说明
图1是激光打印机内基本打印原理图。
图2是激光打印机与处理盒部分电原理图。
图3是接触式显影方式中打印机供处理盒的显影偏压的波形图。
图4是跳跃式显影方式中打印机供处理盒的显影偏压的波形图。
图5是本发明处理盒实施例的电原理图。
图6是本发明处理盒实施例中电子模块的原理图。
图7是本发明处理盒实施例中电子模块的整流电路对激光打印机所提供的跳跃显影的显影偏压整流后的显影偏压的波形图。
图8是本发明处理盒实施例中电子模块T3接线端和T4接线端输出电压信号波形图。
以下结合附图及实施例对本实用新型作进一步说明。
 本发明的实施方式
处理盒实施例：
本发明处理盒实施例的电连接结构如图5所示，处理盒包括感光鼓30、显影辊40、送粉辊50，其中感光鼓30的一端接地，充电辊20电连接于激光打印机25，并且，感光鼓30和显影辊40沿轴向接触，处理盒还包括电子模块26。
如图6是本发明实施例中电子模块的结构图，该电子模块26包括四个接线端T1、T2、T3、T4，其中第一接线端T1接收来自激光打印机25上的供电信号，第二接线端T2与感光鼓30导电片电连接，第三接线端T3与显影辊40电连接且输出显影偏压信号，第四接线端T4与送粉辊50电连接且对其输出负偏压，激光打印机25还对充电辊20输出电信号为充电辊20充电。
电子模块26还包括整流电路、滤波电路、第一稳压电路以及第二稳压电路，其中整流电路为二极管D1，二极管D1的阴极电连接与第一接线端T1，二极管D1的阳极输出整流后的供电信号。
滤波电路为电容C3，电容C3的第一端电连接二极管D1阳极并接收二极管D1整流后发出的供电信号，电容C3的第二端与第二接线端T2连接。
第一稳压电路由电阻R1、稳压二极管ZD1、电容C1组成，电阻R1的第一端电连接于二极管D1阳极并接收经二极管D1整流后输出的电信号，电阻R1的第二端电连接于稳压二极管ZD1的阳极，电阻R1的第二端还电连接于电容C1的第一端，稳压二极管ZD1的阴极电连接于电容C1的第二端和第二接线端T2，电阻R1的第二端还电连接于第三接线端T3输出稳压电信号。
第二稳压电路由电阻R2、稳压二极管ZD2、电容C2组成，电阻R2的第一端电连接于二极管D1阳极并接收经二极管D1整流后输出的电信号，电阻R2的第二端电连接于稳压二极管ZD2的阳极，电阻R2的第二端还电连接于电容C2的第一端，稳压二极管ZD2的阴极电连接于电容C2的第二端和第二接线端T2，电阻R2的第二端还电连接于第三接线端T4输出稳压电信号。
跳跃式显影方式的激光打印机输出的供电信号波形如图4所示，该波形为一含有直流分量的交流电信号波形，当还有直流分量的交流电输入到电子模块26的第一接线端T1时，整流电路的二极管D1对该供电信号进行整流，由于二极管D1的阴极与第一接线端T1连接，所以含有直流分量的交流电正半周电流不能过通过二极管D1，含有直流分量的交流电的负半周可以通过二极管D1，经过二极管D1对供电信号整流后输出的电流如图7所示。
滤波电路的电容C3对如图7的整流后电流进行滤波，电容C3在电流为负电压时进行蓄电，在电流为0伏时进行放电，通过这样的方式对整流后的电流填谷平峰，过滤出平缓的负电流，再进行下一步的稳压。
滤波后的电流流入稳压电路，利用稳压二极管的特性，在稳压二极管ZD1、ZD2的两端保持电压不变，因此第三接线端T3和第四接线端T4分别与稳压二极管ZD1、ZD2的阳极点连接，稳压二极管ZD1、ZD2在阳极输出稳压二极管ZD1、ZD2的稳压值。由于稳压二极管ZD1、ZD2的阴极通过第二接线端T2接地，所以输出的稳压值为低于0伏的稳压值，而电容C1、C2的作用是有效的防止外界噪声扰动并且消除低频电压的波动，为显影辊40和送粉辊50提供更稳定的直流电流。
由于感光鼓30导电片接地，相当于零电位，所以带负电的碳粉在电场力的作用下转移到感光鼓30上。按照带负电碳粉由高电位的显影辊40在电场力的作用下转移到低电位的感光鼓30原理，应用此原理在显影辊40和送粉辊50之间的碳粉传递，因此需要显影辊40的电位低于送粉辊50的电位，这样有利于带负电的碳粉由送粉辊50利用电场力更好的转移到显影辊40上，为此需要第一稳压电路输出到显影辊40的电压值的绝对值小于第二稳压电路输出到送粉辊50的电压值的绝对值。
稳压电路根据上述对输出电压的需要，采用不同稳压值的稳压二极管ZD1和稳压二极管ZD2，且稳压二极管ZD1的稳压值要比稳压二极管ZD2的稳压值小。其中，由稳压二极管ZD1输出到第三接线端T3的电信号波形及由稳压二极管ZD2输出到第四接线端T4的电信号波形如图8所示，这样输出到显影辊的电压值的绝对值将会小于输出到送粉辊的电压值的绝对值，从而实现带负电的碳粉由送粉辊利用电场力更好的转移到显影辊。
从上述的方案可见，利用处理盒的电子模块将激光打印机供给的含有直流成分的交流电信处理后变成稳定的低于0伏的直流电，而且将低于0伏的直流电通过不同的稳压电路将其变成电压值不同的两路的直流电，再分别送到显影辊和送粉辊，实现了一种可替换跳跃式显影且对显影器件和送粉辊的电压进行控制转换的处理盒安装在激光打印机中使用的处理盒，从而提高打印品质，节省成本，保护环境。
处理盒改装方法实施例：
本实施例是对现有处理盒进行改装，改装前的处理盒为跳跃式显影的处理盒，其包括充电辊、感光鼓、显影辊、送粉辊等，感光鼓接地，感光鼓与显影辊之间有一定间隙。
针对上述跳跃式显影的处理盒的改装方法如下：
将感光鼓和显影辊改为沿轴线接触，即将原本一定间隙的感光鼓和显影辊之间的中心距调小，使其无间隙，可以通过调整感光鼓和显影辊的安装定位来实现。
在处理盒内增设一个电子模块，电子模块的结构如上述如图6的处理盒实施例所述的电子模块的结构，将原本处理盒内用于与打印机供电电源电连接的出点与显影辊和送粉辊之间的电路断开，将电子模块的接线端T1接上打印机供电电源储电上，将接线端T2连接感光鼓，将接线端T3与感光鼓连接，将接线端T4与送粉辊连接。
 工业实用性
应用本发明改装后的处理盒安装在原本应该安装跳跃式显影处理盒的激光打印机中，激光打印机供给含有直流分量的交流电的显影偏压信号，该显影偏压经过电子模块输出负直流的显影偏压并加载在显影辊和送粉辊上，使显影辊与感光鼓沿轴线接触，从而实现了接触式显影的工作方式。接触式显影的打印效果理想，提高了打印品质，节省打印成本同时减少对环境的污染。
最后需要强调的是，本发明不限于上述实施方式，如电子模块中整流电路、滤波电路或者稳压电路的改变，还例如第二接线端T2不接入感光鼓而直接接地，这些变化也应该包括在本发明权利要求的保护范围内。

Claims (10)

  1. 处理盒，包括
    感光鼓、显影器件及送粉辊，所述感光鼓的一端接地；
    其特征在于：
    所述感光鼓和所述显影器件沿轴向接触；
    所述处理盒还包括电子模块，所述电子模块包括
    第一接线端，接收激光打印机输出的供电信号；
    第二接线端，与所述感光鼓电连接；
    第三接线端，向所述显影器件输出显影偏压信号；
    第四接线端，与所述送粉辊电连接；
    整流电路，所述整流电路具有二极管，所述二极管的阴极电连接第一接线端，所述二极管的阳极输出所述整流电路整流后的电信号；
    滤波电路，所述滤波电路的第一端接收所述整流电路整流后发出的信号，所述滤波电路的第二端与所述第二接线端电连接；
    第一稳压电路，所述第一稳压电路输入端接收所述整流电路整流后输出的电信号，所述第一稳压电路接地端与所述第二接线端电连接，所述第一稳压电路输出端与所述第三接线端电连接；
    第二稳压电路，所述第二稳压电路输入端接收所述整流电路输出的电信号，所述第二稳压电路接地端与所述第二接线端电连接，所述第二稳压电路输出端与所述第四接线端电连接；
    所述第一稳压电路输出电压值的绝对值小于所述第二稳压电路输出电压值的绝对值。
  2. 根据权利要求1所述的处理盒，其特征在于：
    所述显影器件是显影辊或磁辊。
  3. 根据权利要求1或2所述的处理盒，其特征在于：
    所述滤波电路具有电容，所述电容的第一端电连接所述二极管的阳极，所述电容的第二端与所述第二接线端电连接。
  4. 根据权利要求1或2所述的处理盒，其特征在于：
    所述第一稳压电路具有第一电阻、第一稳压二极管和第二电容，所述第一电阻的第一端电连接所述二极管的阳极，所述第一电阻的第二端电连接第二电容的第一端和第一稳压二极管的阳极，所述第二电容的第二端电连接第一稳压二极管的阴极和所述第二接电线端，第一电阻的第二端还电连接于第三接电线端。
  5. 根据权利要求1或2所述的处理盒，其特征在于：
    所述第二稳压电路具有第二电阻、第二稳压二极管和第三电容，所述第二电阻的第一端电连接所述二极管的阳极，所述第二电阻的第二端电连接第三电容的第一端和第二稳压二极管的阳极，第三电容的第二端电连接第二稳压二极管的阴极和所述第二接电线端，第二电阻的第二端还电连接于第四接电线端。
  6. 处理盒改装方法，所述处理盒包括感光鼓、显影器件及送粉辊，其特征在于：
    该方法包括
    将所述感光鼓和所述显影器件沿轴向接触；
    在所述处理盒内增设电子模块，所述电子模块包括
    第一接线端，接收激光打印机输出的供电信号；
    第二接线端，与所述感光鼓电连接；
    第三接线端，向所述显影器件输出显影偏压信号；
    第四接线端，与所述送粉辊电连接；
    整流电路，所述整流电路具有二极管，所述二极管的阴极电连接第一接线端，所述二极管的阳极输出所述整流电路整流后的信号；
    滤波电路，所述滤波电路的第一端接收所述整流电路整流后发出的信号，所述滤波电路的第二端与所述第二接线端电连接；
    第一稳压电路，所述第一稳压电路输入端接收所述整流电路输出的电信号，所述第一稳压电路接地端与所述第二接线端电连接，所述第一稳压电路输出端与所述第三接线端电连接；
    第二稳压电路，所述第二稳压电路输入端接收所述整流电路输出的电信号，所述第二稳压电路接地端与所述第二接线端电连接，所述第二稳压电路输出端与所述第四接线端电连接；
    所述第一稳压电路输出电压值的绝对值小于所述第二稳压电路输出电压值的绝对值；
    增设所述电子模块后，将所述第一接线端连接至所述激光打印机的供电模块，将所述第二接线端电连接至所述感光鼓，将所述第三接线端电连接至所述显影器件，将第所述四接线端电连接至所述送粉辊。
  7. 根据权利要求6所述的处理盒改装方法，其特征在于
    所述显影器件是显影辊或磁辊。
  8. 根据权利要求6或7所述的处理盒改装方法，其特征在于
    所述滤波电路具有电容，所述电容的第一端电连接所述二极管的阳极，所述电容的第二端与所述第二接线端电连接。
  9. 根据权利要求6或7所述的处理盒改装方法，其特征在于
    所述第一稳压电路具有第一电阻、第一稳压二极管和第二电容，所述第一电阻的第一端电连接所述二极管的阳极，所述第一电阻的第二端电连接第二电容的第一端和第一稳压二极管的阳极，所述第二电容的第二端电连接第一稳压二极管的阴极和所述第二接电线端，第一电阻的第二端还电连接于第三接电线端。
  10. 根据权利要求6或7所述的处理盒改装方法，其特征在于
    所述第二稳压电路具有第二电阻、第二稳压二极管和第三电容，所述第二电阻的第一端电连接所述二极管的阳极，所述第二电阻的第二端电连接第三电容的第一端和第二稳压二极管的阳极，第三电容的第二端电连接第二稳压二极管的阴极和所述第二接电线端，第二电阻的第二端还电连接于第四接电线端。
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