CN116184787A - Image forming assembly, process cartridge and image forming apparatus - Google Patents

Abstract

The embodiment of the invention provides an imaging component, a processing box and an image forming device. The image forming assembly includes a photosensitive drum; a magnetic member that is displaced in accordance with rotation of the photosensitive drum; the magnetic piece is used for generating induction current by moving relative to the magnetic induction piece when the photosensitive drum rotates; the induced current is used to determine whether the imaging assembly is expected. The embodiment of the invention realizes that whether the photosensitive drum works normally or not is determined by the induced current, whether the imaging component accords with the expectation or not is determined, and whether the processing box accords with the expectation or not is further determined.

Description

Image forming assembly, process cartridge and image forming apparatus

[ field of technology ]

The embodiment of the invention relates to the technical field of electronic imaging, in particular to an imaging assembly, a processing box and an image forming device.

[ background Art ]

With the development of electronic imaging technology, image forming apparatuses have been widely used, and imaging assemblies are detachably mounted on the image forming apparatuses. The imaging assembly may include a photosensitive drum (Optical Photoconductor, OPC for short). The influence of the photosensitive drum on the image quality is large, if the photosensitive drum cannot work normally, the image quality is poor, but the prior art cannot judge whether the photosensitive drum works normally or not, and cannot determine whether the imaging component meets the expectations or not.

[ invention ]

In view of the above, an embodiment of the present invention provides an image forming assembly, a process cartridge, and an image forming apparatus for determining whether a photosensitive drum is operating properly by an induced current, whether the image forming assembly is expected, and further whether the process cartridge is expected.

A first aspect provides an imaging assembly comprising:

a photosensitive drum;

a magnetic member that is displaced in accordance with rotation of the photosensitive drum;

the magnetic piece is used for generating induction current by moving relative to the magnetic induction piece when the photosensitive drum rotates; the induced current is used to determine whether the imaging assembly is expected.

In one possible implementation, the imaging assembly further includes a detecting member for outputting a detecting current corresponding to the induced current, the detecting current increasing with an increase in the rotational speed of the photosensitive drum, the detecting current being used to determine whether the imaging assembly meets an expectation.

In one possible implementation, the imaging assembly further includes a power cancellation member for receiving the induced current and canceling power from the outer surface of the photosensitive drum.

In one possible implementation, the electricity-eliminating member is an electricity-eliminating lamp, and the electricity-eliminating lamp is used for receiving the induced current and emitting light to irradiate the outer surface of the photosensitive drum so as to eliminate electricity from the outer surface of the photosensitive drum.

In one possible implementation, the detecting element is a photoresistor, and the detection current increases with an increase in the intensity of the extinction lamp.

In one possible implementation, the imaging assembly further includes a light guide bar disposed along an axial direction of the photosensitive drum, the light guide bar configured to receive light emitted by the extinction lamp to illuminate an outer surface of the photosensitive drum.

In one possible implementation manner, the light guide strip includes a first light guide portion and a second light guide portion, where the first light guide portion and the photosensitive drum are disposed opposite to each other, and the second light guide portion and the detecting member are disposed opposite to each other.

In one possible implementation, a plurality of light guide points are arranged on one side of the light guide strip, which is close to the photosensitive drum, and the light guide points comprise protrusions and/or depressions.

In one possible implementation manner, the imaging assembly further includes a light focusing element, the light focusing element is located between the power cancellation element and the light guiding strip, the light focusing element includes a light inlet end and a light focusing end, the light focusing element is configured to converge light entering from the light inlet end to the light focusing end and guide out the light, the light inlet end is configured to receive light emitted from the power cancellation element, and the light focusing end is configured to guide out the light to the light guiding strip.

In one possible implementation manner, a reflecting member is disposed on a side of the light guide strip away from the photosensitive drum, and the reflecting member is used for reflecting light.

In one possible implementation, the imaging assembly further includes a magnetic induction element, the magnetic induction element cooperating with the magnetic element, the magnetic induction element generating an induced current by relative displacement of the magnetic induction element and the magnetic element.

In one possible implementation, the imaging assembly further includes a driving circuit, and the magnetic induction element is electrically connected to the power cancellation element through the driving circuit.

In one possible implementation, the driving circuit includes a rectifying and filtering circuit.

In one possible implementation, the imaging assembly further includes a carrier, and the magnetic induction element and the driving circuit are both disposed on the carrier.

In one possible implementation, the carrier includes a body portion and an extension portion extending from the body portion, the magnetic induction element is disposed in the body portion, and the drive circuit is disposed in the extension portion.

In one possible implementation, the number of the magnetic induction pieces is plural, and the plural magnetic induction pieces are disposed around the center point of the body portion and are sequentially arranged along the circumferential direction of the center point of the body portion.

In one possible implementation manner, the carrier further includes a power recovery device, where the power recovery device is electrically connected to the magnetic induction element and the power cancellation element, and the magnetic induction element transmits the induced current to the power cancellation element through the power recovery device, and the power recovery device is configured to store the induced current or prevent the induced current from being transmitted to the power cancellation element when the photosensitive drum does not need to perform power cancellation.

In one possible implementation manner, the imaging assembly further includes a housing, the photosensitive drum is rotatably disposed on the housing, and the magnetic induction member is disposed on the housing, and when the photosensitive drum rotates, the magnetic member and the magnetic induction member relatively move to generate an induction current.

In one possible implementation, the imaging assembly further includes a driving member, at least one of the magnetic members is disposed on the driving member, and the magnetic induction member is disposed opposite to the magnetic member and is capable of relative displacement;

the driving member rotates in synchronization with the photosensitive drum.

In one possible implementation, the driving component is a gear.

In one possible implementation, the magnetic member rotates about the same axis as the photosensitive drum.

A second aspect provides a process cartridge comprising: the imaging assembly of the first aspect or any possible implementation of the first aspect.

A third aspect provides an image forming apparatus comprising the imaging assembly of the first aspect or any possible implementation of the first aspect.

In a possible implementation manner, the imaging assembly adopts the imaging assembly of the first aspect, the image forming apparatus further includes a main body and a detecting member, the imaging assembly is configured to be detachably mounted on the main body, the detecting member is disposed on the main body, the detecting member is configured to output a detecting current corresponding to the induced current, the detecting current increases with an increase of a rotation speed of the photosensitive drum, and the detecting current is configured to determine whether the imaging assembly meets an expectation.

In one possible implementation, the imaging assembly further includes a power cancellation member for receiving the induced current and canceling power from the outer surface of the photosensitive drum.

According to the technical scheme provided by the embodiment of the invention, the magnetic part is displaced along with the rotation of the photosensitive drum, and the magnetic part is used for generating induction current by moving relatively to the magnetic induction part when the photosensitive drum rotates, so that whether the photosensitive drum works normally or not is determined by the induction current, whether the imaging component accords with the expectation or not is realized, and whether the processing box accords with the expectation or not is further determined.

[ description of the drawings ]

FIG. 1 is a schematic diagram of an imaging assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a driving component according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of another imaging assembly according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of another imaging assembly according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another imaging assembly according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the magnetic induction element and the current eliminating element in FIG. 5;

fig. 7 is a flowchart of a power cancellation method according to an embodiment of the present invention;

fig. 8 is a schematic diagram of the working principle of the current eliminator in the embodiment of the present invention;

FIG. 9 is a schematic diagram illustrating the working principle of a rectifying and filtering circuit according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another imaging assembly according to an embodiment of the present invention.

[ detailed description ] of the invention

For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one way of describing an association of associated objects, meaning that there may be three relationships, e.g., a and/or b, which may represent: the first and second cases exist separately, and the first and second cases exist separately. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Fig. 1 is a schematic structural view of an image forming assembly according to an embodiment of the present invention, and as shown in fig. 1, the image forming assembly includes a photosensitive drum 20 and a magnetic member 21. The magnetic member 21 is displaced in accordance with the rotation of the photosensitive drum 20. The magnetic member 21 is configured to generate an induced current by relative movement with the magnetic induction member when the photosensitive drum 20 rotates, and the induced current is used to determine whether the image forming assembly is in line with expectations.

As an alternative, at least one magnetic member 21 may be provided on the photosensitive drum 20, for example, the at least one magnetic member 21 may be located at a first end of the photosensitive drum 20. The magnetic member 21 rotates about the same axis as the photosensitive drum 20. In an embodiment of the present invention, the magnetic member 21 may include a permanent magnet or an electromagnet.

The image forming assembly further comprises a driving part 22, at least one magnetic element 21 is arranged on the driving part 22, the magnetic induction element and the magnetic element 21 are oppositely arranged and can relatively displace, and the driving part 22 and the photosensitive drum 20 synchronously rotate, so that transmission fit with the photosensitive drum 20 is realized. Fig. 2 is a schematic structural diagram of a driving component according to an embodiment of the present invention, as shown in fig. 1 and 2, a driving component 22 is disposed at a first end of a photosensitive drum 20, and a magnetic member 21 is disposed on the driving component 22. The photosensitive drum 20 is cylindrical in shape; the driving member 22 is a gear, and is designed to match the shape of the photosensitive drum 20, and the driving member 22 is also cylindrical in shape. In practical applications, the photosensitive drum 20 and the driving member 22 may be provided in other shapes, which are not listed here. As shown in fig. 2, the number of the magnetic members 21 provided on the driving part 22 may be plural, and as an alternative, the plurality of magnetic members 21 may be uniformly arranged around the center point of the driving part 22. In fig. 2, eight magnetic pieces 21 are shown, the eight magnetic pieces 21 being uniformly arranged around the center point of the driving part 22.

In the technical scheme of the imaging component provided by the embodiment of the invention, the magnetic part is displaced along with the rotation of the photosensitive drum, and is used for generating the induction current by relatively moving with the magnetic induction part when the photosensitive drum rotates, but not generating the induction current when the photosensitive drum does not rotate, so that the induction current can characterize whether the photosensitive drum rotates, thereby realizing the purpose of determining whether the photosensitive drum normally works or not through the induction current, and determining whether the imaging component accords with the expectation or not, and further determining whether the processing box accords with the expectation or not.

When the photosensitive drum is in the working stage or the testing stage, the photosensitive drum is required to rotate, if no induction current is generated at the moment, the photosensitive drum does not rotate, the photosensitive drum does not work normally, the working or testing cannot be completed, and the imaging component and the processing box are not in line with expectations.

In addition, according to the rotation speed of the photosensitive drum, the magnitude of the induced current formed can also change correspondingly, for example, the rotation speed of the photosensitive drum can change from low speed to high speed along with the change of working or testing stages, if the photosensitive drum works normally or tests, the speed of the induction coil for cutting the magnetic induction line is increased, and the generated induced current can also increase, but if the photosensitive drum does not work normally or tests, the change trend of the generated induced current can not meet expectations, for example, the induced current does not change; or the induced current decreases; or the amount of induced current increase is not expected, can be used to determine that the photosensitive drum is not operating properly and that the imaging assembly and the process cartridge are not expected.

In addition, when the image forming device is in different working or testing stages, the rotation speeds of the photosensitive drums are different, and the induced currents also have corresponding numerical ranges, so that the values of the induced currents when the image forming device is in a certain working or testing stage can be detected and compared with the numerical ranges of the expected induced currents in the working or testing stage, if the detected quantity of the induced currents does not accord with the numerical ranges, the photosensitive drums can be considered to not work normally, and the imaging components and the processing box do not accord with the expected.

Fig. 3 is a schematic structural diagram of another imaging assembly according to an embodiment of the present invention, as shown in fig. 3, where the imaging assembly in this embodiment further includes a detecting member 5 on the basis of the imaging assembly shown in fig. 1, where the detecting member 5 is configured to output a detecting current corresponding to the induced current, and the detecting current increases with an increase in the rotational speed of the photosensitive drum 20, and the detecting current is used to determine whether the imaging assembly meets the expectations.

The detecting member 5 is electrically connected to the cartridge chip 6. The detection member 5 may comprise a photosensitive element, which may comprise a photoresistor or a photodiode, for example. The detecting member 5 may be electrically connected to the cartridge chip 6 through a wire or a metal contact. In the embodiment of the present invention, the process cartridge chip 6 is detachably mounted on the process cartridge, and the process cartridge chip 6 is also electrically connected to the main control chip of the image forming apparatus. It should be noted that: the main control chip is not specifically shown in the figure. In order to enable the light emitted from the electricity eliminating member 1 to irradiate the detecting member 5, the detecting member 5 may be positioned at a second end of the photosensitive drum 20, wherein the second end is disposed opposite to the first end.

As shown in fig. 3, as an alternative, the second end of the photosensitive drum 20 may also be provided with a driving member so as to drive the photosensitive drum 20 to rotate in conjunction with the driving member provided at the first end. The driving part arranged at the second end can be identical to the driving part arranged at the first end, the driving part arranged at the second end is a gear, and the driving part arranged at the second end is not specifically shown in fig. 3.

The detecting member 5 generates a detecting current corresponding to the induced current under irradiation of light, and outputs the detecting current to the cartridge chip 6. Wherein the detection current is a photocurrent. Furthermore, the processing box chip 6 converts the induced current into an analog voltage and outputs the analog voltage to the main control chip, so that the main control chip can detect the state information according to the analog voltage.

The magnitude of the detection current generated by the detection member 5 is proportional to the rotation speed of the photosensitive drum 20, and when the rotation speed of the photosensitive drum 20 is higher, the detection current generated by the detection member 5 is higher, and the analog voltage converted by the induction current is further higher; alternatively, as the rotation speed of the photosensitive drum 20 is smaller, the detection current generated by the detecting member 5 is smaller, and the analog voltage converted by the detection current is smaller. The state information detected by the main control chip is different for different analog voltages, and the state information can comprise first state information or second state information. Specifically, the main control chip can detect first state information corresponding to the analog voltage A according to the larger analog voltage A; and/or the main control chip can detect the second state information corresponding to the analog voltage B according to the smaller analog voltage B. For example, in the process from no rotation to slow rotation of the photosensitive drum 20, the analog voltage received by the main control chip slowly rises from 0V to 5V, and the second state information can be detected according to the analog voltage; and/or, in the process of the photosensitive drum 20 from slow rotation to fast rotation, the analog voltage received by the main control chip slowly rises from 5V to 10V, and the first state information can be detected according to the analog voltage. Therefore, the main control chip indicates that the detection current generated by the detection element 5 is larger when detecting the first state information, and indicates that the detection current generated by the detection element 5 is smaller when detecting the second state information. However, as long as the main control chip can receive the analog voltage, the first state information and/or the second state information can be detected according to the analog voltage, and whether the processing box accords with the expectation or not can be determined no matter the size of the analog voltage.

In the embodiment of the invention, the detection piece is arranged in the processing box, the main control chip can detect the state information according to the detection current generated by the detection piece, and then the processing box can be used according to the state information, and the processing box is matched with the image forming device.

When judging whether the photosensitive drum works normally, the numerical value of the induced current can be directly obtained; the induction current can be used for other functions and the effect generated by the corresponding function can be detected, for example, the induction current is used for emitting light, the intensity of the light is detected, the magnitude of the induction current is indirectly judged, or the induction current is used for heating, and the heating temperature is detected, so that the magnitude of the induction current is indirectly judged. It is understood that the indirect determination of the magnitude of the induced current is not limited to the above two methods.

Fig. 4 is a schematic structural diagram of another imaging assembly according to an embodiment of the present invention, as shown in fig. 4, where the imaging assembly in this embodiment further includes a power cancellation member 1 on the basis of the imaging assembly shown in fig. 3, where the power cancellation member 1 is configured to receive an induced current and cancel power from an outer surface of the photosensitive drum 20.

The electricity eliminator 1 can eliminate electricity to the photosensitive drum 20 in various ways. As an alternative, the erasing member 1 may erase the photosensitive drum 20 by exposing, specifically, the erasing member 1 is an erasing lamp, and when the magnetic induction member transmits an induced current to the erasing member 1, the erasing member 1 emits light and is used for erasing the photosensitive drum 20. As another alternative, the charge eliminator 1 may also charge the photosensitive drum 20 in reverse polarity to eliminate residual charge on the photosensitive drum 20, so as to achieve charge elimination of the photosensitive drum 20.

In the embodiment of the present invention, the electricity eliminating member 1 is described as an example of an electricity eliminating lamp, and the electricity eliminating lamp is used for receiving the induced current and emitting light to irradiate the outer surface of the photosensitive drum 20, so that the outer surface of the photosensitive drum 20 is eliminated.

The power cancellation member 1 irradiates the emitted light to the detection member 5. Since the light intensity of the charge eliminating member 1 is proportional to the rotation speed of the photosensitive drum 20 and the magnitude of the detection current generated by the detection member 5 is proportional to the light intensity of the charge eliminating member 1, the magnitude of the detection current generated by the detection member 5 is proportional to the rotation speed of the photosensitive drum 20. For example, the extinction element 1 is an extinction lamp, the detection element 5 may be a photoresistor, and the detection current increases with the increase of the intensity of the extinction lamp.

The image forming assembly further includes a light guide bar 301, the light guide bar 301 being disposed along an axial direction of the photosensitive drum 20. The current eliminating member 1 is disposed opposite to the light guiding strip 301, and the current eliminating member 1 can irradiate the emitted light to the detecting member 5 through the light guiding strip 301. The light guide 301 is for conducting light emitted from the erasing member 1 to the photosensitive drum 20 and for erasing, and specifically, the light guide 301 is for receiving light emitted from the erasing lamp to irradiate the outer surface of the photosensitive drum 20. The light guide strip 301 is disposed opposite to the outer surface of the photosensitive drum 20, wherein, since the photosensitive drum 20 is in the shape of a cylinder, the outer surface of the photosensitive drum 20 is a side surface of the cylinder. The material of the light guide bar 301 may include polymethyl methacrylate (polymethyl methacrylate, PMMA), polycarbonate (PC), or Polyurethane (PU). In the embodiment of the invention, the shape of the light guide strip 301 can be set to be flat, so that the occupied space is reduced, and the miniaturized design of the processing box is further realized. In the embodiment of the present invention, compared with the scheme of adopting a light guide column in the prior art, the light guide strip 301 adopts a flat light guide strip to replace the light guide column, and no hole for placing the light guide column is required to be added on the processing box, thereby further realizing the miniaturized design of the processing box.

The light guide bar 301 is provided with a plurality of light guide points including protrusions and/or depressions on one side thereof adjacent to the photosensitive drum 20. The light guide points are integrally formed with the light guide strips 301. The light guide points are used for converting incident light into a surface light source after carrying out numerous refraction in the light guide strip 301, and then the light uniformly exits from one side of the light guide strip 301 close to the photosensitive drum 20 and irradiates the outer surface of the photosensitive drum 20, so that the light is refracted and diffused in the light guide strip 301 to form a surface light source uniform light state, the coating on the outer surface of the photosensitive drum 20 is uniformly charged and discharged, and the service life of the photosensitive drum 20 is prolonged.

The imaging assembly further comprises a light gathering piece 302, the light gathering piece 302 is located between the electricity eliminating piece 1 and the light guide strip 301, the light gathering piece 302 comprises a light inlet end and a light gathering end, the light gathering piece 302 is used for gathering light entering from the light inlet end to the light gathering end and guiding out the light, the light inlet end is used for receiving the light emitted by the electricity eliminating piece 1, and the light gathering end is used for guiding out the light to the light guide strip 301. The light guide strip 301 guides light to irradiate the light to the outer surface of the photosensitive drum 20, and residual charges on the outer surface of the photosensitive drum 20 after the light is irradiated are uniformly guided away, so that the residual charges on the outer surface of the photosensitive drum 20 are eliminated. In the embodiment of the invention, the structures of the power cancellation member 1, the light condensation member 302 and the light guide strip 301 can be almost completely matched, thereby preventing the light leakage phenomenon. As an alternative, the light collector 302 may be a lens.

The light guide 301 is provided with a reflecting member 303 on a side away from the photosensitive drum 20, and the reflecting member 303 is configured to reflect light. The reflecting member 303 can reflect the light within the light guide 301 that is not directed to the photosensitive drum 20, so that the light guide 301 can irradiate as much light as possible onto the photosensitive drum 20, thereby enhancing the light intensity of the outer surface of the photosensitive drum 20. In addition, if the light of the light guide bar 301 overflows, abnormal exposure of the photosensitive drum 20 can be caused to generate a print defect, but in the embodiment of the invention, the reflecting member 303 is arranged at one side of the light guide bar 301, so that the light can be reflected back to the light guide bar 301, and the light is effectively prevented from overflowing, thereby avoiding the print defect generated by abnormal exposure of the photosensitive drum 20. As an alternative, the reflecting member 303 is a reflecting film.

The light guide bar 301 includes a first light guide portion and a second light guide portion, the first light guide portion being disposed opposite to the photosensitive drum 20, the second light guide portion being disposed opposite to the detecting member 5. The light guiding strip 301 is divided into two parts by taking a dotted line as a boundary, wherein one part is a first light guiding part, the other part is a second light guiding part, the second light guiding part is a structure that the first light guiding part extends out along the length direction of the photosensitive drum 20, and the first light guiding part and the second light guiding part can be integrally formed. The light emitted from the first light guide portion may be irradiated onto the photosensitive drum 20, and the light emitted from the second light guide portion may be irradiated onto the detecting member 5.

As shown in fig. 4, when the photosensitive drum 20 and the magnetic member 21 rotate, the charge eliminating member 1 emits light and irradiates the emitted light to the light converging member 302, the light converging member 302 converges the light to the light guiding strip 301, the light guiding strip 301 guides the light so that the light emitted from the first light guiding portion in the light guiding strip 301 irradiates onto the photosensitive drum 20 and the light emitted from the second light guiding portion in the light guiding strip 301 irradiates onto the detecting member 5. When light is irradiated onto the detecting element 5, the optical characteristics of the detecting element 5 are changed. The detecting element 5 generates a detecting current under the irradiation of light and transmits the detecting current to the processing box chip 6, and the light detecting circuit of the processing box chip 6 converts the detecting current into an analog voltage and outputs the analog voltage to the main control chip.

As an alternative, as shown in fig. 4, the process cartridge further includes a cleaning blade including a transparent adhesive tape 304 and a metal member, the transparent adhesive tape 304 being disposed on a side of the light guide strip 301 near the photosensitive drum 20, for example, the transparent adhesive tape 304 being made of PU. The light emitted from the light guide bar 301 is irradiated to the outer surface of the photosensitive drum 20 through the transparent adhesive tape 304. It should be noted that: the metal member is not specifically shown in fig. 4, and the location of the metal member does not affect the light propagation.

Fig. 5 is a schematic structural view of another imaging assembly according to an embodiment of the present invention, fig. 6 is a schematic structural view of the magnetic induction element and the current eliminator in fig. 5, and as shown in fig. 5 and 6, the imaging assembly in this embodiment further includes a magnetic induction element 2 on the basis of the imaging assembly shown in fig. 4, the magnetic induction element 2 is matched with the magnetic element 21, and the magnetic induction element 2 generates induced current through the relative displacement between the magnetic induction element 2 and the magnetic element 21.

The electricity eliminating piece 1 is electrically connected with the magnetic induction piece 2, the magnetic induction piece 2 transmits induction current to the electricity eliminating piece 1, and the electricity eliminating piece 1 is used for eliminating electricity of the photosensitive drum 20.

The imaging assembly further comprises a driving circuit 4, and the magnetic induction element 2 is electrically connected with the electricity eliminating element 1 through the driving circuit 4.

The imaging assembly further comprises a carrier 3, and the magnetic induction pieces 2 and the driving circuit 4 are all arranged on the carrier 3. As shown in fig. 6, the magnetic induction element 2 and the driving circuit 4 are disposed on the carrier 3, the positive phase terminal (+) and the negative phase terminal (-) of the magnetic induction element 2 are connected to the input terminal of the driving circuit 4, and the output terminal of the driving circuit 4 is connected to the charge eliminating element 1. As shown in fig. 6, the current eliminator 1 is provided on the carrier 3.

As shown in fig. 5 and 6, the carrier 3 includes a body portion 31 and an extension portion 32 extending from the body portion 31, the magnetic induction element 2 is provided to the body portion 31, and the driving circuit 4 is provided to the extension portion 32. Wherein, the part structure of the extension portion 32 is disposed on the body portion 31, and another part of the extension portion 32 extends out of the body portion 31. The current eliminator 1 is provided at one end of the extension portion 32 extending out of the body portion 31, and thus the current eliminator 1 is provided outside the body portion 31, and the position of the current eliminator 1 is adjusted by adjusting the length of the extension portion 32.

As shown in fig. 6, the number of magnetic induction pieces 2 is plural, and the plural magnetic induction pieces 2 are disposed around the center point of the body portion 31 and are sequentially arranged in the circumferential direction of the center point of the body portion 31. The shape of the body portion 31 may be set according to the design requirement of the product, for example, the shape of the cross section of the body portion 31 may be circular or square, as shown in fig. 5, in the embodiment of the present invention, in order to match the shape of the driving member of the photosensitive drum 20, the shape of the cross section of the body portion 31 is circular, preferably, fig. 6 shows six magnetic induction pieces 2, and the six magnetic induction pieces 2 are uniformly arranged around the center point of the body portion 31. Each magnetic induction piece 2 includes a positive phase terminal (+) and a negative phase terminal (-), and the positive phase terminal (+) and the negative phase terminal (-) of each magnetic induction piece 2 are connected to the input terminal of the driving circuit 4, which should be explained: the connection lines between the positive (+) and negative (-) phase terminals of the magnetic induction element 2 and the driving circuit 4 are not shown in detail in fig. 6.

As shown in fig. 5 and 6, the carrier 3 is a flexible circuit board (Flexible Printed Circuit, FPC), and the body portion 31 and the extension portion 32 are both FPCs. The magnetic induction piece 2 is a magnetic induction coil, a plurality of printed circuit board (Printed Circuit Board, PCB) coils are uniformly and densely etched on the body portion 31, and the PCB coils are used as the magnetic induction coils; the drive circuit 4 can be miniaturized and attached to the extension portion 32. In the embodiment of the invention, the flexible circuit board is adopted for the circuit board, so that the flattening design of the power elimination component 1 can be realized, and the structural space of the processing box is reduced.

As shown in fig. 6, the driving circuit 4 includes a rectifying filter circuit. The magnetic induction elements 2 may generate an induced electromotive force E, for example, the plurality of magnetic induction elements 2 may generate n induced electromotive forces including induced electromotive forces E1, E2, … …, en, where n is a positive integer. The rectification filter circuit rectifies and filters the induced electromotive force generated by the magnetic induction piece 2 to form direct current power supply voltage, and outputs the direct current power supply voltage to the power elimination piece 1, and the power elimination piece 1 emits light under the drive of the direct current power supply voltage. As an alternative, the current eliminator 1 is an LED.

The number of magnetic pieces 21 and the number of magnetic induction pieces 2 may be the same or different, and in the embodiment of the present invention, eight magnetic pieces 21 and six magnetic induction pieces 2 are described as an example. As shown in fig. 2, 5 and 6, the magnetic member 21 may be embedded in the driving member 22, and when the driving member 22 rotates, the magnetic member 21 and the photosensitive drum 20 rotate around the same axis, and when the magnetic member 21 rotates, a magnetic field is generated, and the magnetic induction member 2 cuts the magnetic field to generate an induced electromotive force, that is, the magnetic induction member 2 cuts the magnetic field to generate an induced current.

As shown in fig. 5 and 6, the carrier 3 is disposed opposite to the first end of the photosensitive drum 20 so that the magnetic induction member 2 is disposed opposite to the magnetic member 21, and specifically, the body portion 31 of the carrier 3 is disposed opposite to the first end of the photosensitive drum 20 so that the magnetic induction member 2 is disposed opposite to the magnetic member 21. The end of the extension portion 32 of the carrier 3, where the current eliminating member 1 is disposed, extends to the light entrance of the light guide bar 301, so that the current eliminating member 1 is disposed at the light entrance of the light guide bar 301. It should be noted that: the magnetic induction element 2 is not shown in detail in fig. 5.

As shown in fig. 5 and 6, the center point of the carrier 3 and the center point of the driving member 22 are both located on an extension of the center line of the photosensitive drum 20.

The imaging component further comprises a shell, the photosensitive drum 20 is rotatably arranged on the shell, the magnetic induction piece 2 is arranged on the shell, and when the photosensitive drum 20 rotates, the magnetic piece 2 and the magnetic induction piece 21 relatively move to generate induction current. It should be noted that: the housing is not specifically shown in the figures.

The following describes in detail the method of power cancellation of an imaging assembly in an embodiment of the present invention. Fig. 7 is a flowchart of a power cancellation method according to an embodiment of the present invention, fig. 8 is a schematic diagram of an operating principle of a power cancellation component according to an embodiment of the present invention, and fig. 9 is a schematic diagram of an operating principle of a rectifying and filtering circuit according to an embodiment of the present invention. The method of power cancellation of the imaging assembly is described in detail below in conjunction with fig. 7-9. As shown in fig. 7, the power cancellation method includes:

step 102, the magnetic induction element and the magnetic element are relatively displaced, so that the magnetic induction element generates induced current.

As shown in fig. 6 and 8, the driving member 22 rotates to drive the photosensitive drum 20 to rotate and the magnetic member 21 to rotate. As the magnetic member 21 rotates, the magnetic induction member 2 and the magnetic member 21 are relatively displaced, so that the magnetic induction member 2 generates an induced current.

Specifically, as shown in fig. 5, 6 and 8, a varying magnetic field is generated when the magnetic member 21 rotates, and the magnetic induction member 2 cuts the magnetic field to generate an induced electromotive force E, that is, the magnetic induction member 2 cuts the magnetic field to generate an induced current, that is, the magnetic force lines in the magnetic field are cut by the magnetic induction member 2 to generate an induced current, wherein the induced current is an alternating current.

As an alternative, as shown in fig. 5 and 8, the driving circuit 4 includes a rectifying and filtering circuit, and the power cancellation member 1 is an LED. The driving circuit 4 performs rectifying and filtering processing on the induced current to generate a supply voltage VCC, where the supply voltage is a dc supply voltage. The driving circuit 4 supplies power to the current eliminator 1 through the power supply voltage VCC, so that the magnetic induction element 2 outputs an induction current to the current eliminator 1 through the driving circuit 4. Specifically, as shown in fig. 8, the driving circuit 4 and the current limiting resistor R are connected in series with the current eliminator 1, the driving circuit 4 outputs the power supply voltage VCC and supplies power to the current eliminator 1 through the current limiting resistor R, so that the magnetic induction element 2 outputs an induced current to the current eliminator 1 through the driving circuit 4 to drive the current eliminator 1 to emit light.

The driving circuit 4 may further include an amplifying circuit and/or a voltage stabilizing circuit, and is capable of amplifying and stabilizing a current.

As shown in fig. 5, 6 and 9, after the photosensitive drum 20 rotates one turn, the number n of induced electromotive forces E generated by the magnetic induction elements 2 is a×b, where a is the number of the magnetic induction elements 2 and b is the number of the magnetic elements 21. The driving circuit 4 rectifies the a×b induced electromotive forces E generated by the magnetic induction element 2 to obtain 2a×b induced electromotive forces E, and the driving circuit 4 filters the 2a×b induced electromotive forces E to obtain a power supply voltage VCC. The more the number of induced electromotive forces E per unit time, the more stable the power supply voltage VCC outputted after the filtering process. The induced electromotive force E is determined by the amount of change in magnetic flux per unit time of the magnetic induction element 2, that is: e= Δq/Δt, where Δq is the amount of change in magnetic flux, and Δq is related to the magnetic pole strength of the magnetic member 21 and the rotational speed of the photosensitive drum 20. The amount of change Δq in magnetic flux is proportional to the rotational speed of the photosensitive drum 20, and therefore, the induced electromotive force E is proportional to the rotational speed of the photosensitive drum 20, that is: the induced current is proportional to the rotational speed of the photosensitive drum 20, and the higher the rotational speed of the photosensitive drum 20, the higher the induced electromotive force E (induced current) is, and the higher the intensity of the outgoing light of the charge eliminating element 1 is, and the higher the luminance of the outgoing light is. That is, the light emission luminance of the erasing member 1 is proportional to the rotation speed of the photosensitive drum 20. For example, the faster the rotation speed of the photosensitive drum 20, the higher the light emission luminance of the charge eliminator 1, the faster the charge eliminating speed of the residual charge on the outer surface of the photosensitive drum 20; alternatively, when the rotational speed of the photosensitive drum 20 is reduced (for example, when the image forming apparatus is in the intermittent printing mode or the silent printing mode), the light intensity of the erasing member 1 is reduced as the rotational speed of the photosensitive drum 20 is reduced, and the speed of erasing the residual electric charges on the outer surface of the photosensitive drum 20 is also reduced. Therefore, the light intensity of the charge eliminating member 1 varies with the rotation speed of the photosensitive drum 20, and the luminance of the charge eliminating member 1 is controlled. Thereby realizing the matching of the rotating speed and the electricity eliminating degree of the photosensitive drum 20, effectively preventing the excessive electricity eliminating of the photosensitive drum 20 by the electricity eliminating piece or insufficient electricity eliminating of the photosensitive drum 20, and further realizing the matching electricity eliminating of the electricity eliminating piece and the photosensitive drum.

Step 104, the current eliminator receives the induction current and starts.

As an alternative method, when the current eliminator 1 is an LED, the induced current is used to drive the current eliminator 1 to emit light, so as to realize the starting of the current eliminator 1.

And 106, eliminating residual charges on the outer surface of the photosensitive drum by an eliminating part.

As shown in fig. 5, the light emitted from the charge eliminating member 1 is irradiated to the photosensitive surface of the photosensitive drum 20 to eliminate residual charges on the outer surface of the photosensitive drum 20. The light emitted by the electricity eliminating part 1 irradiates the light condensing part 302, the light condensing part 302 converges the light to the light guiding strip 301, the light guiding strip 301 guides the light to irradiate the outer surface of the photosensitive drum 20, and the reflecting part 303 can reflect the redundant light emitted by the light guiding strip 301 back to the light guiding strip 301, so that the redundant light can be irradiated on the photosensitive drum 20 by the light guiding strip 301, the residual charges on the outer surface of the photosensitive drum 20 are uniformly guided away after the light is irradiated, and the electricity eliminating of the residual charges on the outer surface of the photosensitive drum 20 is realized.

In the technical scheme provided by the embodiment of the invention, the magnetic induction piece and the magnetic piece are relatively displaced so that the magnetic induction piece generates induction current, the electricity eliminating piece receives the induction current and is started, the electricity eliminating piece eliminates residual charges on the outer surface of the photosensitive drum, and the electricity eliminating piece eliminates electricity on the photosensitive drum without additionally configuring a power supply, so that the occupied space of the electricity eliminating piece is reduced, the structure of the electricity eliminating piece is simple, the passive design is adopted, and external power supply is not needed; when the magnetic induction piece and the magnetic piece relatively displace, the magnetic induction piece generates induction current to drive the electricity eliminating piece to eliminate electricity, so that the electricity eliminating degree of the electricity eliminating piece changes along with the speed of the relative displacement of the magnetic induction piece and the magnetic piece, the matching of the speed of the relative displacement of the magnetic induction piece and the magnetic piece and the electricity eliminating degree is realized, the phenomenon that the electricity eliminating piece excessively eliminates electricity or eliminates electricity insufficiently to the photosensitive drum is effectively prevented, and the electricity eliminating piece and the photosensitive drum are matched.

The embodiment of the invention effectively prevents the excessive electricity elimination of the electricity elimination part on the photosensitive drum, avoids the optical fatigue phenomena of overcharge, overdischarge and the like of the photosensitive drum, and prolongs the service life of the photosensitive drum; the embodiment of the invention effectively prevents insufficient electricity elimination of the photosensitive drum, avoids the phenomenon of ghost image generated by the printed image, and improves the quality of the printed image.

In the technical scheme of the embodiment of the invention, the induced current generated by the magnetic induction piece is in direct proportion to the rotating speed of the photosensitive drum, so that the light intensity of the electricity eliminating piece is in direct proportion to the rotating speed of the photosensitive drum, and the light intensity of the electricity eliminating piece is matched with the rotating speed of the photosensitive drum, so that the dark decay curve of the electricity eliminating piece and the photosensitive drum can be matched, the outer surface of the photosensitive drum can be effectively eliminated, the charge and discharge capacity of the photosensitive drum is improved, the fatigue phenomena of double image, overcharge, overdischarge and the like are prevented, and the service life of the photosensitive drum is prolonged.

According to the technical scheme provided by the embodiment of the invention, the outer surface of the photosensitive drum is subjected to electricity elimination through the passive electricity elimination piece and the light guide strip, so that the residual charge on the outer surface of the photosensitive drum is reduced, the optical fatigue is reduced, the ghost phenomenon in the printing process is avoided, and the quality of the printed image is improved.

Fig. 10 is a schematic structural diagram of another imaging assembly according to an embodiment of the present invention, as shown in fig. 10, where, based on the imaging assembly shown in fig. 5, the carrier 3 further includes a power recovery device 33, the power recovery device 33 is electrically connected to the magnetic induction element 2 and the power cancellation element 1, respectively, the magnetic induction element 2 transmits an induced current to the power cancellation element 1 through the power recovery device 33, and the power recovery device 33 is used for storing the induced current or preventing the induced current from being transmitted to the power cancellation element 1 when the photosensitive drum 20 does not need to perform power cancellation.

The extension of the carrier 3 may be a selective switch 32. The selective switch 32 is connected to the first end a of the power recovery device 33 to electrically connect the power recovery device 33 with the magnetic induction element 2, and the selective switch 32 may be configured to charge the power recovery device 33 or prevent the induced current from being supplied to the power cancellation element 1, at which time the photosensitive drum 20 does not need to perform power cancellation, and the power recovery device 33 stores the induced current or prevents the induced current from being supplied to the power cancellation element 1. The selective switch 32 is configured such that when the power recovery device 33 is charged, the power recovery device 33 may be a battery or other device for storing energy. The selective switch 32 is connected to the second end b of the power recovery device 33 so that the power recovery device 33 is electrically connected to the electricity-consuming element 1, the selective switch 32 may be arranged to directly supply electricity to the electricity-consuming element 1, in which case the magnetic induction element 2 may deliver an induced current to the electricity-consuming element 1 via the power recovery device 33.

In the image forming process including charging, developing and transferring, the photosensitive drum 20 is required to rotate to realize the operation of forming the developer image on the paper, but the photosensitive drum 20 does not need to use the charge eliminating member 1 at this time, when the image forming control unit controls the driving member 22 to rotate, the magnetic member 21 generates a magnetic field when rotating, the magnetic induction member 2 cuts magnetic lines of force in the magnetic field to generate induced current, and the driving circuit still continues to generate the power supply voltage. The present embodiment provides the power recovery device 33 to perform power recovery on the power supply voltage generated by the rotation of the photosensitive drum 20 when the photosensitive drum 20 does not need to use the power cancellation member 1, so as to protect the photosensitive drum 20 and avoid the situations of false power cancellation, overexposure or excessive power cancellation on the photosensitive drum 20. In addition, after a certain amount of electric power is collected, the power recovery device 33 can also provide an electric power source for the electricity-eliminating member 1, so that energy consumption is saved, and electric power is enhanced for the electricity-eliminating member 1. Therefore, with the embodiment of the present invention, when the photosensitive drum 20 does not need to use the electricity-eliminating member 1, the image forming control unit controls the selective switch to be connected to the power recovery device 33, so that the power recovery can be performed on the power supply voltage generated by the driving circuit; when the photosensitive drum 20 needs to be subjected to the power-off operation by the power-off member 1, the image forming control unit controls the selective switch to be connected with the power-off member 1 to directly supply power, so that the power-off member 1 performs the matching power-off operation for the photosensitive drum 20.

Embodiments of the present invention provide a process cartridge including an image forming assembly, wherein a description of the image forming assembly may be taken in the description of the embodiments of fig. 1 to 10, and the description is not repeated herein. The process cartridge is detachably mounted to the image forming apparatus.

An embodiment of the present invention provides an image forming apparatus including an image forming assembly, wherein a description of the image forming assembly may be taken into consideration in the embodiments of fig. 1 to 10, and will not be repeated here.

The embodiment of the invention provides another image forming device, which comprises an imaging component, a main body and a detection piece, wherein the imaging component can comprise a photosensitive drum and a magnetic piece, the magnetic piece is displaced along with the rotation of the photosensitive drum, the magnetic piece is used for generating induced current through relative movement with the magnetic induction piece when the photosensitive drum rotates, and the induced current is used for determining whether the imaging component accords with expectations.

The imaging component is used for being detachably mounted on the main body, the detection piece is arranged on the main body and used for outputting detection current corresponding to the induction current, the detection current is increased along with the increase of the rotating speed of the photosensitive drum, and the detection current is used for determining whether the imaging component accords with expectations.

The imaging assembly further includes a charge removing member for receiving the induced current and removing charge from the outer surface of the photoreceptor drum.

The description of the imaging assembly may be referred to the description of the embodiment in fig. 1 to 10, and will not be repeated here.

In the field of print imaging, examples of image forming apparatuses include: inkjet printers, laser printers, LED printers, copiers, scanners or multifunctional all-in-one fax machines, and multifunctional peripherals (MFPs) that perform the above functions in a single device. The image forming apparatus includes an image forming control unit for controlling the entire image forming apparatus, and an image forming unit for forming an image on a conveyed sheet under the control of the image forming control unit based on image forming data and a developer such as toner stored in a process cartridge.

In the field of print imaging, a process cartridge is used to contain developer. For example, the process cartridge is an ink cartridge, and the developer is ink, the ink cartridge is for accommodating the ink; the processing box is a selenium drum, and the developer is carbon powder, so that the selenium drum is used for containing the carbon powder; the processing box is a powder box or a powder cylinder, and the developer is carbon powder, so that the powder box is used for containing the carbon powder, and the powder cylinder is used for containing the carbon powder.

In the technical scheme of the processing box and the image forming device provided by the embodiment of the invention, the magnetic part is displaced along with the rotation of the photosensitive drum, the magnetic part is used for generating induction current by relatively moving with the magnetic induction part when the photosensitive drum rotates, and the induction current is not generated when the photosensitive drum does not rotate, so that the induction current can characterize whether the photosensitive drum rotates, thereby realizing that whether the photosensitive drum works normally or not by the induction current, and the imaging group DD222639I

Whether the piece meets the expectations and further whether the process cartridge meets the expectations is determined.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Claims (25)

1. An imaging assembly, comprising:

a photosensitive drum;

a magnetic member that is displaced in accordance with rotation of the photosensitive drum;

the magnetic piece is used for generating induction current by moving relative to the magnetic induction piece when the photosensitive drum rotates; the induced current is used to determine whether the imaging assembly is expected.

2. The image forming assembly according to claim 1, further comprising a detecting member for outputting a detecting current corresponding to the induced current, the detecting current increasing with an increase in a rotational speed of the photosensitive drum, the detecting current being used to determine whether the image forming assembly meets an expectation.

3. The imaging assembly of claim 2, further comprising a power cancellation member for receiving the induced current and canceling power from the outer surface of the photoreceptor drum.

4. The imaging assembly of claim 3, wherein said charge-depleting member is a charge-depleting lamp, said charge-depleting lamp being configured to receive said induced current and emit light to illuminate said outer surface of said photoreceptor drum to deplete said outer surface of said photoreceptor drum.

5. The imaging assembly of claim 4, wherein the sensing member is a photoresistor and the sensing current increases as the intensity of the extinction lamp increases.

6. The imaging assembly of claim 4 or 5, further comprising a light guide bar disposed along an axial direction of the photoreceptor drum, the light guide bar configured to receive light from the extinction lamp to illuminate an outer surface of the photoreceptor drum.

7. The imaging assembly of claim 6, wherein the light guide bar includes a first light guide portion and a second light guide portion, the first light guide portion and the photosensitive drum being disposed opposite one another, the second light guide portion and the detector being disposed opposite one another.

8. The imaging assembly of claim 6, wherein a side of the light guide bar adjacent to the photoreceptor drum is provided with a plurality of light guide points, the light guide points comprising protrusions and/or depressions.

9. The imaging assembly of claim 6, further comprising a light gathering member positioned between the power cancellation member and the light guide bar, the light gathering member comprising a light entrance end and a light gathering end, the light gathering member configured to gather light entering from the light entrance end to the light gathering end and to guide the light out, the light entrance end configured to receive light emitted from the power cancellation member, and the light gathering end configured to guide the light out to the light guide bar.

10. The imaging assembly of claim 6, wherein a side of the light guide strip remote from the photosensitive drum is provided with a reflective member for reflecting light.

11. The imaging assembly of any of claims 1-10, further comprising a magnetic induction element, the magnetic induction element cooperating with the magnetic element, the magnetic induction element generating an induced current by relative displacement of the magnetic induction element and the magnetic element.

12. The imaging assembly of claim 11, further comprising a drive circuit, the magnetic induction element being electrically connected to the charge cancellation element through the drive circuit.

13. The imaging assembly of claim 12, wherein the drive circuit comprises a rectifying and filtering circuit.

14. The imaging assembly of claim 12, further comprising a carrier, the magnetic induction element and the drive circuit being disposed on the carrier.

15. The imaging assembly of claim 14, wherein the carrier includes a body portion and an extension portion extending from the body portion, the magnetic induction element being disposed in the body portion, the drive circuit being disposed in the extension portion.

16. The imaging assembly of claim 15, wherein the number of magnetic induction elements is a plurality, the plurality of magnetic induction elements being disposed about and sequentially arranged circumferentially about a center point of the body portion.

17. The imaging assembly of claim 14, wherein the carrier further comprises a power recovery device electrically connected to the magnetic induction element and the power cancellation element, respectively, the magnetic induction element delivering the induced current to the power cancellation element through the power recovery device, the power recovery device for storing the induced current or preventing the induced current from being delivered to the power cancellation element when the photosensitive drum does not need to be powered down.

18. The imaging assembly of claim 11, further comprising a housing, wherein the photosensitive drum is rotatably disposed on the housing, wherein the magnetic inductive element is disposed on the housing, and wherein the magnetic inductive element and the magnetic inductive element move relative to each other to generate an induced current when the photosensitive drum rotates.

19. The imaging assembly of any of claims 1-10, further comprising a drive member, at least one of the magnetic members being disposed on the drive member, the magnetic induction member being disposed opposite the magnetic member and being capable of relative displacement;

the driving member rotates in synchronization with the photosensitive drum.

20. The imaging assembly of claim 19, wherein the drive component is a gear.

21. The imaging assembly of claim 19, wherein the magnetic member rotates about the same axis as the photosensitive drum.

22. A process cartridge comprising the imaging assembly of any one of claims 1-21.

23. An image forming apparatus comprising the imaging assembly of any one of claims 1-21.

24. The image forming apparatus according to claim 23, wherein the image forming apparatus further comprises a main body to which the image forming apparatus is detachably attached, and a detecting member provided on the main body to output a detecting current corresponding to the induced current, the detecting current increasing with an increase in a rotation speed of the photosensitive drum, the detecting current being used to determine whether the image forming apparatus meets an expectation.

25. The image forming apparatus according to claim 24, wherein the image forming assembly further comprises a power cancellation member for receiving the induced current and canceling power to the photosensitive drum outer surface.

Images