阅读说明：本技术 成像设备的工作方法、可读存储介质和成像设备 (Method of operating image forming apparatus, readable storage medium, and image forming apparatus ) 是由 杨晓锋 汤付根 于 2019-09-29 设计创作，主要内容包括：本发明提供一种成像设备的工作方法、可读存储介质和成像设备,成像设备的工作方法包括当所述成像设备进入故障状态,向转印辊施加与转印带上的带电调色剂极性相同的偏压。该成像设备的工作方法可避免在打印纸背面粘上调色剂。(The invention provides an operating method of an image forming apparatus, a readable storage medium, and an image forming apparatus. The image forming apparatus operates to prevent toner from sticking to the back surface of the printing paper.)

1. an operating method of an image forming apparatus, comprising:

When the image forming apparatus enters a failure state, a bias voltage of the same polarity as that of the charged toner on the transfer belt is applied to the transfer roller.

2. The method of operating an image forming apparatus according to claim 1, characterized in that:

and when the imaging equipment receives the paper shortage signal output by the paper detection part, the imaging equipment enters a fault state.

3. The method of operating an image forming apparatus according to claim 2, characterized in that:

The paper detection component is a pressure sensor.

4. The operating method of an image forming apparatus according to any one of claims 1 to 3, characterized in that:

The fault states include a paper out state, a paper jam state, an offline state, and a powder out state.

5. The operating method of an image forming apparatus according to any one of claims 1 to 3, characterized in that:

after applying a bias voltage with the same polarity as the charged toner on the transfer belt to the transfer roller, the working method further includes removing the toner on the surface of the transfer belt.

6. An imaging device comprising a processor for implementing the method of operation of any one of claims 1-5 when executing a computer program stored in a memory.

7. A readable storage medium having stored thereon a computer program, characterized in that: the computer program realizing the steps of the method according to any of claims 1-5 when executed by a processor.

8. An image forming apparatus comprising:

the paper supply box is used for containing printing paper;

The transfer printing device comprises a transfer printing belt, a driving device and a transfer printing roller, wherein the driving device drives the transfer printing belt to rotate, and the transfer printing roller is positioned on one side of the transfer printing belt;

Characterized in that the imaging apparatus further comprises:

A pressure sensor mounted on the paper supply cassette, the pressure sensor being configured to detect an amount of printed paper in the paper supply cassette;

A bias applying device including a metal shaft and a conductive rubber layer wrapped around the metal shaft, the bias applying device being electrically connected to an end of the metal shaft, the bias applying device being configured to apply a bias to the transfer roller having the same polarity as the charged toner on the transfer belt.

9. The imaging apparatus of claim 8, wherein:

The image forming apparatus further includes a cleaning member, the transfer belt including a transfer portion and an image forming portion for forming a toner image, the transfer roller for transferring the toner image onto the printing paper at the transfer portion;

The cleaning member is located downstream of the transfer portion and upstream of the image forming portion in a direction in which the transfer belt rotates, and the cleaning member is configured to remove toner from a surface of the transfer belt.

10. The imaging apparatus according to claim 8 or 9, characterized in that:

a paper bearing piece is arranged in the paper feeding box, and the pressure sensor is installed between the paper bearing piece and the bottom wall of the paper feeding box.

Technical Field

the present invention relates to the field of electrophotographic image formation, and in particular, to an image forming apparatus, a method of operating the image forming apparatus, a readable storage medium, and an image forming apparatus.

Background

An image forming apparatus of an electrophotographic type, such as a laser image forming apparatus, is an apparatus for forming an image on an image forming medium, such as paper, by using the principle of electrophotography through at least processes of charging, exposure, development, transfer, fixing, and cleaning.

in the existing color image forming apparatus, toner in toner cartridges of four colors is adsorbed onto a transfer belt by serial charging and exposure, so as to form an electrostatic latent image on the transfer belt, and when a printing paper moves between the transfer belt and the transfer roller during the operation and rotation of the transfer belt, the toner on the transfer belt is transferred onto the printing paper by the opposite charge effect on the transfer roller, and simultaneously, the toner on the printing paper is fused into fibers of the printing paper by the subsequent pressure roller.

However, when there is no printing paper between the transfer belt and the transfer roller of the image forming apparatus, the transfer roller will absorb a certain amount of toner under the action of electric charge, and after the printing paper is added and printed again, the toner on the transfer roller will adhere to the back of the printing paper, which will affect the aesthetic appearance and printing quality of the printing paper.

Disclosure of Invention

A first object of the present invention is to provide a method of operating an image forming apparatus which prevents toner from sticking to a back surface of a printing paper.

a second object of the present invention is to provide an image forming apparatus that realizes the above-described working method.

a third object of the present invention is to provide a readable storage medium for implementing the above-mentioned working method.

A fourth object of the present invention is to provide an image forming apparatus which prevents toner from sticking to a back surface of a printing paper.

To achieve the first object, the present invention provides an operating method of an image forming apparatus including applying a bias voltage having the same polarity as charged toner on a transfer belt to a transfer roller when the image forming apparatus enters a failure state.

Preferably, the image forming apparatus enters a failure state when the image forming apparatus receives the paper shortage signal output from the paper detecting section.

Further, the paper detection component is a pressure sensor.

Preferably, the method further comprises removing the toner on the surface of the transfer belt after applying a bias having the same polarity as the charged toner on the transfer belt to the transfer roller.

To achieve the second object, the present invention provides an imaging device comprising a processor for implementing the above-mentioned working method when executing a computer program stored in a memory.

To achieve the third object, the present invention provides a readable storage medium, on which a computer program is stored, which, when being executed by a processor, performs the steps of the method.

In order to achieve the fourth object, the present invention provides an image forming apparatus including a paper feeding cassette, a transfer device, a pressure sensor and a bias applying device, wherein the paper feeding cassette is used for holding printing paper, the transfer device includes a transfer belt, a driving device and a transfer roller, the driving device drives the transfer belt to rotate, the transfer roller is located on one side of the transfer belt, the pressure sensor is mounted on the paper feeding cassette, the pressure sensor is used for detecting the amount of printing paper in the paper feeding cassette, the transfer roller includes a metal shaft and a conductive rubber layer wrapped on the metal shaft, the bias applying device is electrically connected with an end of the metal shaft, and the bias applying device is used for applying a bias to the transfer roller, the bias is the same as the polarity of the charged toner on the transfer belt.

It is preferable that the image forming apparatus further includes a cleaning member, the transfer belt includes a transfer portion and an image forming portion, the image forming portion is for forming a toner image, and the transfer roller is for transferring the toner image onto the printing paper at the transfer portion. The cleaning member is located downstream of the transfer portion and upstream of the image forming portion in a direction in which the transfer belt rotates, and the cleaning member is configured to remove toner from a surface of the transfer belt.

The paper feeding box is provided with a paper bearing piece, and the pressure sensor is installed between the paper bearing piece and the bottom wall of the paper feeding box.

the invention has the advantages that by arranging the paper detection part and the bias applying device, when the imaging equipment enters a fault state, such as a paper-out state, a paper jam state, an off-line state or a powder-out state, the driving device drives the transfer belt to stop rotating, and simultaneously, the bias applying device applies bias with the same polarity as the charged toner on the transfer belt to the transfer roller, so that the toner on the transfer belt can not be transferred to the transfer roller under the mutual repulsion action of charges with the same polarity. In addition, after the cleaning component is started, the bias applying device applies bias with the same polarity as that of charged toner on the transfer belt to the transfer roller, and the toner cannot be transferred to the transfer roller in the process of cleaning the transfer belt, so that the toner is prevented from being adhered to the back surface of printing paper, and the printing quality is ensured.

Drawings

Fig. 1 is a block diagram of an embodiment of an image forming apparatus of the present invention.

Fig. 2 is an exploded view of a sheet supply cassette, a sheet carrier, and a sheet feeding assembly in an embodiment of an image forming apparatus of the present invention.

Fig. 3 is a structural view of a sheet carrier in an embodiment of an image forming apparatus of the present invention.

Fig. 4 is a schematic diagram of an embodiment of an imaging device of the present invention.

Fig. 5 is a schematic view of a sub-assembly in a printing state in an embodiment of an image forming apparatus of the present invention.

FIG. 6 is a schematic diagram of a portion of the assembly of an embodiment of the image forming apparatus of the present invention in a state where the sheet feeding cassette is empty or a transfer belt is cleaned.

Fig. 7 is a step of a method of operation of an embodiment of an imaging device of the present invention.

The invention is further explained with reference to the drawings and the embodiments.

Detailed Description

Imaging device and working method embodiment:

Referring to fig. 1 to 4, the image forming apparatus of the present embodiment includes a process cartridge 10, a paper supply cartridge 1, a transfer device, a paper detection member, a cleaning member 8, a bias applying device 3, a processor, and a readable storage medium.

The transfer device comprises a transfer belt 4, a driving device 5 and a transfer roller 6, the transfer belt 4 is in an annular shape, the driving device 5 comprises two driving rollers 51 and a motor for driving the driving rollers 51 to rotate, the transfer belt 4 is sleeved on the two driving rollers 51, the motor drives the driving rollers 51 to rotate and drives the transfer belt 4 to rotate, the transfer roller 6 is positioned on one side of the transfer belt 4, the extension direction of the transfer roller 6 is parallel to the extension direction of the driving rollers 51, the transfer belt 4 comprises a transfer portion 41 and an image forming portion 42, the image forming portion 42 is used for forming a toner image, and the transfer roller 4 is used for transferring the toner image to printing paper 7 at the transfer portion 41.

Referring to fig. 2 and 3, a sheet bearing member 11 is arranged in the sheet feeding cassette 1, the sheet detecting component is a pressure sensor 2, and the pressure sensor 2 is installed between the sheet bearing member 11 and the bottom wall of the sheet feeding cassette 1. The printing paper 7 is contained in a paper carrier 11 on the paper supply cassette 1, and the pressure sensor 2 is used to detect the number of printing papers 7 in the paper carrier 11.

A paper feed roller 12 is provided above the paper carrier 11, and the paper feed roller 12 feeds the printing paper 7 in the paper carrier to a paper feed gap between the transfer belt 4 and the transfer roller 6. The paper feed roller 12 is movable in the vertical direction, and when it is necessary to feed the printing paper 7 forward, the paper feed roller 12 moves down and abuts against the printing paper 7 in the paper carrier 11, and feeds the printing paper 7 forward by the friction force.

The transfer roller 6 includes a metal shaft and a conductive rubber layer wrapped around the metal shaft, and a bias applying device 3 is electrically connected to an end of the metal shaft, the bias applying device 3 being for applying a bias to the transfer roller 6 having the same polarity as that of the charged toner on the transfer belt 4. The bias applying device 3 adopts a bias circuit, a bias output end of the bias circuit is connected with the end part of the metal shaft through a conductive elastic sheet, and then positive bias can be output to the metal shaft, so that the metal shaft and the conductive rubber layer are charged with positive charges, or negative bias is output to the metal shaft, so that the metal shaft and the conductive rubber layer are charged with negative charges.

the pressure sensor 2 is electrically connected to a processor, which is electrically connected to the driving device 5, and the processor is electrically connected to the bias applying device 3. The pressure sensor 2 outputs a pressure signal to the processor, the processor outputs a first operation signal to the driving device 5 according to the pressure signal, and the processor outputs a second operation signal to the bias voltage applying device 3 according to the pressure signal. The driving device 5 stops the transfer belt 4 according to the first operation signal, and the bias applying device 3 applies a bias to the transfer roller 6 according to the second operation signal.

The cleaning member 8 is located downstream of the transfer portion 41 and upstream of the image forming portion 42 in the direction in which the transfer belt 4 rotates, the cleaning member 8 is a thin plate-like blade, and after the toner image is transferred, the cleaning member 8 is brought into contact with the surface of the transfer belt 4 to remove the toner remaining after the transfer on the surface of the transfer belt 4. The cleaning member 8 is used for cleaning the transfer belt 4, the processor outputs a second working signal to the bias applying device 3 before outputting a cleaning signal to the cleaning member 8, and the bias applying device 3 applies a bias to the transfer roller 6 according to the second working signal.

Referring to fig. 4 to 7, the operating method of the image forming apparatus includes the following steps.

first, step S1 is executed to input the number of print pages to the image forming apparatus.

Next, step S2 is executed, and the pressure sensor 2 detects one weight of the printing paper 7 in the paper feed cassette 1. Further, the detection is continued after each printing of one printing paper 7, and the pressure signal is output to the processor, which checks the number of printing papers 7 set based on the pressure signal.

Next, step S3 is performed, and when the input of the print command is started, the processor compares the number of printing sheets 7 set in the image forming apparatus with the number of input printing sheets, and determines whether the number of prints is smaller than the number of printing sheets.

Next, if so, step S4 is executed until printing is completed.

If not, namely the number of input printing pages is greater than or equal to the number of printing paper 7 in the paper feeding cassette 1, step S5 is executed, after the last printing paper 7 is printed, when the pressure signal output to the processor by the pressure sensor 2 is a paper shortage signal, the image forming apparatus enters a paper shortage state, the processor outputs a first working signal to the driving device 5 and outputs a rotation stop signal to the transfer roller 6, the driving device 5 drives the transfer belt 4 to stop rotating, and the transfer roller 6 stops rotating.

At the same time, the processor outputs a second operation signal to the bias applying device 3, as shown in fig. 6, the bias applying device 3 is activated and applies a bias to the transfer roller 6 with the same polarity as the charged toner on the transfer belt 4, for example, when the polarity of the toner on the transfer belt 4 is positive, the bias applying device 3 applies a bias to the transfer roller 6 with a positive value, so that the toner on the transfer belt 4 is not transferred to the transfer roller 6 under the mutual repulsion of charges with the same polarity. This ensures that the transfer roller 6 does not stick to the toner. And simultaneously, an alarm reminds the user to add printing paper 7.

Next, step S6 is executed until the user addition is completed.

Next, step S2 is executed, the pressure sensor 2 performs weight detection again on the printing paper 7 in the paper feeding cassette 1, and compared with the number of input printing sheets, when the number of input printing sheets is smaller than the number of printing paper 7 in the image forming apparatus, the image forming apparatus normally starts the printing function, as shown in fig. 5, the printing paper 7 moves between the transfer belt 4 and the transfer roller 6, and at the time of normal printing, the bias applying device 3 supplies a bias opposite to the polarity of the toner on the transfer belt 4 to the transfer roller 6, for example, when the polarity of the toner on the transfer belt 4 is positive, the bias applying device 3 applies a negative bias to the transfer roller 6, so that the toner on the transfer belt 4 is transferred to the printing paper 7 due to the attraction of the opposite charges.

In addition, when the cleaning member 8 starts cleaning the transfer belt 4, no printing paper 7 passes between the transfer belt 4 and the transfer roller 6, and the processor outputs a second operation signal to the bias applying device 3, as shown in fig. 6, the bias applying device 3 is activated and applies a bias having the same polarity as that of the charged toner on the transfer belt 4 to the transfer roller 6, so that the toner on the transfer belt 4 is not transferred to the transfer roller 6 by the repulsion of charges having the same polarity. This ensures that the transfer roller 6 does not stick to the toner. After the bias applying device 3 applies a bias to the transfer roller 6, the cleaning member 8 removes the toner on the surface of the transfer belt 4.

Further, the number of the bias applying devices may be two, and both the bias applying devices are electrically connected to the transfer roller, one of the bias applying devices is for applying a bias to the transfer roller with the same polarity as the charged toner on the transfer belt, and the other bias applying device is for applying a bias to the transfer roller with the opposite polarity to the charged toner on the transfer belt. When the image forming apparatus enters a jammed state, an offline state, or a toner-out state other than the paper-out state, a bias voltage having the same polarity as that of the charged toner on the transfer belt may also be applied to the transfer roller by the bias voltage applying device. The paper detection means may be a detection means such as a photoelectric sensor capable of detecting the remaining amount of paper. The above-described modifications also achieve the object of the present invention.

As can be seen, by arranging the pressure sensor and the bias applying device, after the paper in the paper supply box is printed, the processor controls the driving device and drives the transfer belt to stop rotating, and meanwhile, the bias applying device applies bias with the same polarity as the charged toner on the transfer belt to the transfer roller, so that the toner on the transfer belt can not be transferred to the transfer roller under the mutual repulsion action of charges with the same polarity. In addition, after the cleaning component is started, the bias applying device applies bias with the same polarity as that of charged toner on the transfer belt to the transfer roller, and the toner cannot be transferred to the transfer roller in the process of cleaning the transfer belt, so that the toner is prevented from being adhered to the back surface of printing paper, and the printing quality is ensured.

The imaging device of the embodiment has a housing, a circuit board is arranged in the housing, a processor and a memory are arranged on the circuit board, a computer program which can run on the processor is stored in the memory, and each step of the working method of the imaging device is realized when the processor executes the computer program.

for example, a computer program may be partitioned into one or more modules that are stored in a memory and executed by a processor to implement the modules of the present invention. One or more of the modules may be a series of computer program instruction segments capable of performing certain functions, which are used to describe the execution of the computer program in the terminal device.

the Processor may be a Central Processing Unit (CPU), or may be other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the appliance and connected to the various parts of the overall appliance by various interfaces and lines.

The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the appliance by operating or executing the computer programs and/or modules stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the appliance, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.

Readable storage medium embodiments:

The computer program stored in the memory of the image forming apparatus may be stored in a readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, all or part of the processes in the method of the above embodiments may be implemented by a computer program, which may be stored in a readable storage medium and used by a processor to implement the steps of the method of the above imaging apparatus.

Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, not limitations, and various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention, and any changes, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be embraced therein.