CN116184787A - Image forming assembly, process box and image forming device - Google Patents

Abstract

Embodiments of the present invention provide an image forming assembly, a process cartridge, and an image forming apparatus. The imaging assembly includes a photosensitive drum; a magnetic part, the magnetic part is displaced with the rotation of the photosensitive drum; the magnetic part is used to move relative to the magnetic induction part to generate an induced current when the photosensitive drum rotates; The sense current is used to determine if the imaging component is as expected. The embodiment of the present invention can determine whether the photosensitive drum is working normally, whether the imaging assembly meets expectations, and then determines whether the process cartridge meets expectations through the induction current.

Description

Image forming assembly, process box and image forming device

【Technical field】

The embodiments of the present invention relate to the technical field of electronic imaging, and in particular, to an imaging component, a process box and an image forming device.

【Background technique】

With the development of electronic imaging technology, image forming devices have been widely used, and imaging components are detachably installed on the image forming devices. The imaging component may include a photosensitive drum (Optical Photoconductor, OPC for short). The photosensitive drum has a great impact on the image quality. If the photosensitive drum does not work normally, the image quality will be poor. However, in the current related technology, it is impossible to judge whether the photosensitive drum is working normally, and it is impossible to determine whether the imaging component meets expectations.

【Content of invention】

In view of this, the embodiments of the present invention provide an imaging assembly, a process cartridge and an image forming device, which are used to determine whether the photosensitive drum is working normally, whether the imaging assembly meets expectations, and then determine whether the process cartridge meets expectations through induced current.

A first aspect provides an imaging assembly, comprising:

Photosensitive drum;

a magnetic member that is displaced as the photosensitive drum rotates;

The magnetic element is used to generate an induced current by moving relative to the magnetic induction element when the photosensitive drum rotates; the induced current is used to determine whether the imaging assembly meets expectations.

In a possible implementation manner, the imaging assembly further includes a detection element, the detection element is used to output a detection current corresponding to the induced current, and the detection current increases as the rotation speed of the photosensitive drum increases. Large, the detection current is used to determine whether the imaging component meets expectations.

In a possible implementation manner, the imaging assembly further includes a dissipating element, and the dissipating element is configured to receive the induced current and dissipate electricity on the outer surface of the photosensitive drum.

In a possible implementation manner, the neutralizing member is a neutralizing lamp, and the neutralizing lamp is configured to receive the induced current and emit light to irradiate the outer surface of the photosensitive drum, so as to eliminate electricity on the outer surface of the photosensitive drum.

In a possible implementation manner, the detection element is a photoresistor, and the detection current increases as the light intensity of the discharge lamp increases.

In a possible implementation manner, the imaging assembly further includes a light guide bar, the light guide bar is arranged along the axial direction of the photosensitive drum, and the light guide bar is used to receive the light emitted by the discharge lamp to Irradiates the outer surface of the photosensitive drum.

In a possible implementation manner, the light guide strip includes a first light guide part and a second light guide part, the first light guide part is arranged opposite to the photosensitive drum, and the second light guide part and the The detection parts are arranged oppositely.

In a possible implementation manner, a side of the light guide strip close to the photosensitive drum is provided with a plurality of light guide points, and the light guide points include protrusions and/or depressions.

In a possible implementation manner, the imaging assembly further includes a light concentrating member, the light concentrating member is located between the power dissipating member and the light guide strip, and the light concentrating member includes a light entering end and a concentrating The light end, the light concentrating part is used to converge the light entering from the light entering end to the light concentrating end and guide it out, the light entering end is used to receive the light emitted by the power dissipating part, and the light concentrating The end is used to guide the light to the light guide strip.

In a possible implementation manner, a reflective member is provided on a side of the light guide bar away from the photosensitive drum, and the reflective member is used to reflect light.

In a possible implementation manner, the imaging assembly further includes a magnetic induction element, the magnetic induction element cooperates with the magnetic element, and the magnetic induction element generates an induced current through the relative displacement between the magnetic induction element and the magnetic element .

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

In a possible implementation manner, the driving circuit includes a rectification and filtering circuit.

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

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

In a possible implementation manner, there are multiple magnetic induction elements, and the plurality of magnetic induction elements are arranged around the center point of the body part and arranged in sequence along the circumference of the center point of the body part.

In a possible implementation manner, the carrier further includes a power recovery device, the power recovery device is electrically connected to the magnetic induction element and the power dissipating element, and the magnetic induction element transfers the power recovery device to the The induced current is delivered to the power dissipating member, and the power recovery device is used to store the induced current or prevent the induced current from being delivered to the dissipating member when the photosensitive drum does not need to be dissipated.

In a possible implementation manner, the imaging assembly further includes a casing, the photosensitive drum is rotatably arranged on the casing, the magnetic induction element is arranged on the casing, and when the photosensitive drum rotates, When , the relative movement of the magnetic element and the magnetic induction element generates an induced current.

In a possible implementation manner, the imaging assembly further includes a driving part, at least one of the magnetic parts is arranged on the driving part, and the magnetic induction part is arranged opposite to the magnetic part and can be relatively displaced;

The drive member rotates synchronously with the photosensitive drum.

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

In a possible implementation manner, the magnetic member and the photosensitive drum rotate around the same axis.

A second aspect provides a process cartridge, including: the first aspect or the imaging component in any possible implementation manner of the first aspect.

A third aspect provides an image forming apparatus, including the imaging component in the first aspect or any possible implementation manner of the first aspect.

In a possible implementation manner, the imaging component adopts the imaging component of the first aspect, and the image forming device further includes a main body and a detection part, and the imaging component is used to be detachably installed on the main body, and the The detection part is arranged on the main body, and the detection part is used to output a detection current corresponding to the induction current, the detection current increases with the increase of the rotation speed of the photosensitive drum, and the detection current is used to determine if the imaging component is as expected.

In a possible implementation manner, the imaging assembly further includes a dissipating element, and the dissipating element is configured to receive the induced current and dissipate electricity on the outer surface of the photosensitive drum.

In the technical solution provided by the embodiment of the present invention, the magnetic part is displaced with the rotation of the photosensitive drum, and the magnetic part is used to generate an induced current by moving relative to the magnetic induction part when the photosensitive drum rotates, thereby realizing whether the photosensitive drum is determined by the induced current. Working properly, the imaging components are as expected, which in turn determines whether the process cartridge is as expected.

【Description of drawings】

FIG. 1 is a schematic structural diagram of an imaging component provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a driving component provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another imaging component provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another imaging component provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another imaging component provided by an embodiment of the present invention;

Fig. 6 is a structural schematic diagram of the magnetic induction element and the current dissipating element in Fig. 5;

FIG. 7 is a flow chart of a power elimination method provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of the working principle of the power dissipating device in the embodiment of the present invention;

9 is a schematic diagram of the working principle of the rectification and filtering circuit in the embodiment of the present invention;

FIG. 10 is a schematic structural diagram of another imaging component provided by an embodiment of the present invention.

【Detailed ways】

In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

It should be understood that the term "and/or" used herein is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which may mean that A exists alone, and A and B exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

FIG. 1 is a schematic structural diagram of an imaging assembly provided by an embodiment of the present invention. As shown in FIG. 1 , the imaging assembly includes a photosensitive drum 20 and a magnetic member 21 . The magnetic member 21 is displaced as the photosensitive drum 20 rotates. The magnetic part 21 is used to move relative to the magnetic induction part to generate an induced current when the photosensitive drum 20 rotates, and the induced current is used to determine whether the imaging assembly meets expectations.

As an optional solution, at least one magnetic member 21 can be disposed on the photosensitive drum 20 , for example, at least one magnetic member 21 can be located at the first end of the photosensitive drum 20 . The magnetic member 21 and the photosensitive drum 20 rotate around the same axis. In the embodiment of the present invention, the magnetic member 21 may include a permanent magnet or an electromagnet.

The imaging assembly also includes a driving part 22, at least one magnetic part 21 is arranged on the driving part 22, the magnetic induction part is arranged opposite to the magnetic part 21 and can be relatively displaced, and the driving part 22 rotates synchronously with the photosensitive drum 20, so as to realize the synchronous rotation with the photosensitive drum 20. transmission fit. FIG. 2 is a structural schematic diagram of a driving part provided by an embodiment of the present invention. As shown in FIGS. The shape of the photosensitive drum 20 is cylindrical; the driving part 22 is a gear, designed to match the shape of the photosensitive drum 20, the shape of the driving part 22 is also cylindrical. In practical applications, the photosensitive drum 20 and the driving component 22 can also be arranged in other shapes, which will not be listed here. As shown in FIG. 2 , there may be multiple magnetic pieces 21 disposed on the driving component 22 . As an alternative, multiple magnetic pieces 21 are uniformly arranged around the center point of the driving component 22 . Eight magnetic pieces 21 are shown in FIG. 2 , and the eight magnetic pieces 21 are evenly arranged around the central point of the driving part 22 .

In the technical solution of the imaging assembly provided by the embodiment of the present invention, the magnetic part is displaced with the rotation of the photosensitive drum, and the magnetic part is used to move relative to the magnetic induction part to generate an induced current when the photosensitive drum rotates, and if the photosensitive drum does not rotate Then no induced current will be generated, so the induced current can represent whether the photosensitive drum is rotating, so as to realize whether the photosensitive drum is working normally, whether the imaging component meets expectations, and then determine whether the process cartridge meets expectations through the induced current.

Wherein, when in the working stage or testing stage, the photosensitive drum needs to be rotated. If there is no induction current at this time, it means that the photosensitive drum is not rotating. In line with expectations.

In addition, according to the rotation speed of the photosensitive drum, the size of the induced current will also change accordingly. For example, with the change of the working or testing stage, the rotation speed of the photosensitive drum may change from low speed to high speed. The speed at which the coil cuts the magnetic induction line is accelerated, and the generated induced current will also increase. However, if the photosensitive drum is not working normally or during the test, the change trend of the generated induced current may not meet expectations, for example, the induced current does not change; or the induced current Decrease; or the increase of the induced current does not meet expectations, both can be used to judge that the photosensitive drum is not working normally, and the imaging components and process cartridges are not as expected.

In addition, when the image forming device is in different working or testing stages, the rotation speed of the photosensitive drum is different, and the induced current also has a corresponding value range at this time, so the induced current can be detected by detecting the value of the induced current when the image forming device is in a certain working or testing stage value, and compare it with the value range of the expected induced current during the above work or test stage. If the detected amount of induced current does not meet the above value range, it can be considered that the photosensitive drum is not working normally, and the imaging component and the process box Not as expected.

Fig. 3 is a schematic structural diagram of another imaging assembly provided by an embodiment of the present invention. As shown in Fig. 3, the imaging assembly in this embodiment further includes a detection part 5 on the basis of the imaging assembly shown in Fig. The component 5 is used to output a detection current corresponding to the induced current, the detection current increases with the increase of the rotation speed of the photosensitive drum 20, and the detection current is used to determine whether the imaging assembly meets expectations.

The detection part 5 is electrically connected with the process cartridge chip 6 . The detection element 5 may include a photosensitive element, for example, the photosensitive element may include a photoresistor or a photodiode. The detection part 5 can be electrically connected with the processing cartridge chip 6 through wires or metal contacts. In the embodiment of the present invention, the process cartridge chip 6 is detachably installed on the process cartridge, and the process cartridge chip 6 is also electrically connected with the main control chip of the image forming device. It should be noted that the main control chip is not specifically drawn in the figure. In order to enable the light emitted by the dissipating element 1 to irradiate the detecting element 5 , the detecting element 5 may be located at the second end of the photosensitive drum 20 , wherein the second end is opposite to the first end.

As shown in FIG. 3 , as an optional solution, the second end of the photosensitive drum 20 may also be provided with a driving component, so as to jointly drive the photosensitive drum 20 to rotate with the driving component provided at the first end. The driving part arranged at the second end can be the same as the driving part arranged at the first end, and 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 detection element 5 generates a detection current corresponding to the induced current under the irradiation of light, and outputs the detection current to the process cartridge chip 6 . Wherein, the detection current is 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 state information according to the analog voltage.

The magnitude of the detection current generated by the detection part 5 is proportional to the rotation speed of the photosensitive drum 20. When the rotation speed of the photosensitive drum 20 is larger, the detection current generated by the detection part 5 is larger, and then the analog voltage converted by the induced current is larger; The smaller the rotation speed of the drum 20 is, the smaller the detection current generated by the detection part 5 is, and the smaller the analog voltage converted by the detection current is. For different analog voltages, the state information detected by the main control chip is also different, and the state information may include first state information or second state information. Specifically, the main control chip can detect the 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 status information corresponding to the analog voltage B according to the smaller analog voltage B. status information. For example, when the photosensitive drum 20 rotates from no rotation to slow rotation, the analog voltage received by the main control chip will slowly rise from 0V to 5V, and then the second state information can be detected according to the analog voltage; and/or, During the process of the photosensitive drum 20 rotating from slow to fast, the analog voltage received by the main control chip will slowly rise from 5V to 10V, and the first state information can be detected according to the analog voltage. Therefore, when the main control chip detects the first state information, it indicates that the detection current generated by the detection part 5 is relatively large, and when the main control chip detects the second state information, it indicates that the detection current generated by the detection part 5 is small. However, as long as the main control chip can receive the analog voltage, and then can detect the first state information and/or the second state information according to the analog voltage, it can determine whether the process cartridge meets expectations regardless of the magnitude of the analog voltage.

In the embodiment of the present invention, by setting the detection element in the process box, the main control chip can detect the state information according to the detection current generated by the detection element, and then determine that the process box can be used according to the state information. The process box and the image forming device are matched.

When judging whether the photosensitive drum is working normally, the value of the induced current can be obtained directly; the induced current can also be used for other functions, and the effect of the corresponding function can be detected, for example, the induced current can be used for lighting, and the light intensity can be measured The detection is performed to indirectly judge the magnitude of the induced current, or the induced current is used for heating, and the magnitude of the induced current is indirectly judged by detecting the heating temperature. It can be understood that the methods for indirectly judging the magnitude of the induced current are not limited to the above two methods.

Fig. 4 is a schematic structural diagram of another imaging component provided by an embodiment of the present invention. As shown in Fig. The electric element 1 is used for receiving the induced current and dissipating electricity on the outer surface of the photosensitive drum 20 .

The dissipating member 1 can dissipate the photosensitive drum 20 in various ways. As an optional solution, the dissipating element 1 can dissipate electricity to the photosensitive drum 20 through exposure. Specifically, the dissipating element 1 is a dissipating lamp. Lights up and is used to discharge electricity from the photosensitive drum 20 . As another optional solution, the electricity dissipating member 1 can also charge the photosensitive drum 20 with reverse polarity, so as to eliminate the residual charge on the photosensitive drum 20 , so as to realize the electricity elimination of the photosensitive drum 20 .

In the embodiment of the present invention, it will be described by taking the neutralizer 1 as a neutralizer lamp as an example. The neutralizer lamp is used to receive the induced current and emit light to irradiate the outer surface of the photosensitive drum 20 to eliminate electricity from the outer surface of the photosensitive drum 20 .

The dissipating element 1 irradiates the emitted light to the detecting element 5 . Because the light intensity of the electricity dissipating part 1 is proportional to the rotating speed of the photosensitive drum 20, and the magnitude of the detection current produced by the detection part 5 is proportional to the light intensity of the power elimination part 1, therefore, the magnitude of the detection current produced by the detection part 5 is proportional to the rotation speed of the photosensitive drum 20. The rotational speed of the photosensitive drum 20 is proportional. For example, the dissipating element 1 is a dissipating lamp, and the detecting member 5 may be a photoresistor, and the detection current increases as the light intensity of the dissipating lamp increases.

The imaging assembly further includes a light guide bar 301 , and the light guide bar 301 is arranged along the axial direction of the photosensitive drum 20 . The dissipating element 1 is arranged opposite to the light guide strip 301 , and the dissipating element 1 can irradiate the emitted light to the detecting element 5 through the light guide strip 301 . The light guide strip 301 is used to transmit the light emitted by the discharge element 1 to the photosensitive drum 20 and used for discharge. 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 strip 301 may include polymethyl methacrylate (polymethyl methacrylate, PMMA), polycarbonate (Polycarbonate, PC) or polyurethane (polyurethane, PU). In the embodiment of the present invention, the shape of the light guide bar 301 can be set to be flat, which reduces the occupied space, thereby further realizing the miniaturization design of the process box. In the embodiment of the present invention, compared with the solution of using the light guide rod in the prior art, the light guide bar 301 adopts a flat light guide bar instead of the light guide rod, and there is no need to add a pair of holes for placing the light guide rod on the process box, thereby further realizing Miniaturized design of the process box.

A side of the light guide strip 301 close to the photosensitive drum 20 is provided with a plurality of light guide points, and the light guide points include protrusions and/or depressions. The light guide point and the light guide strip 301 are integrally formed. The function of the light guide point is to convert the incident light into a surface light source after countless times of refraction in the light guide strip 301, and then the light uniformly exits from the side of the light guide strip 301 close to the photosensitive drum 20 and irradiates the surface of the photosensitive drum 20. The outer surface realizes the refraction and diffusion of light in the light guide strip 301 into a uniform light state of the surface light source, so that the coating on the outer surface of the photosensitive drum 20 is evenly charged and discharged, thereby prolonging the service life of the photosensitive drum 20 .

The imaging assembly also includes a light concentrating part 302, which is located between the power dissipating part 1 and the light guide strip 301. The light concentrating part 302 includes a light entering end and a light concentrating end. The incoming light converges to the light concentrating end and is exported. The light entering end is used to receive the light emitted by the power dissipating device 1 , and the light concentrating end is used to guide the light to the light guide strip 301 . The light guide strip 301 guides the light so that the light irradiates the outer surface of the photosensitive drum 20, and the residual charge on the outer surface of the photosensitive drum 20 is uniformly guided away after the outer surface of the photosensitive drum 20 is illuminated, so that the residual charge on the outer surface of the photosensitive drum 20 is realized. Dissipate electricity. In the embodiment of the present invention, the structures of the current dissipating element 1 , the light concentrating element 302 and the light guide strip 301 can almost completely fit together, thereby preventing light leakage. As an optional solution, the light concentrating member 302 may be a lens.

A reflector 303 is provided on the side of the light guide bar 301 away from the photosensitive drum 20 , and the reflector 303 is used to reflect light. The reflector 303 can reflect back the light in the light guide strip 301 that is not radiated to the photosensitive drum 20, so that the light guide strip 301 can irradiate as much light as possible to the photosensitive drum 20, thereby enhancing the brightness of the outer surface of the photosensitive drum 20. light intensity. In addition, if the light from the light guide strip 301 overflows, it will cause abnormal exposure of the photosensitive drum 20 and produce print defects. However, in the embodiment of the present invention, a reflector 303 is provided on one side of the light guide strip 301, which can reflect back to the light guide The bar 301 effectively prevents the light from spilling out, thereby avoiding the printing defect caused by the abnormal exposure of the photosensitive drum 20 . As an optional solution, the reflective member 303 is a reflective film.

The light guide strip 301 includes a first light guide part and a second light guide part, the first light guide part is arranged opposite to the photosensitive drum 20 , and the second light guide part is arranged opposite to the detection element 5 . Divide the light guide bar 301 into two parts with the dotted line as the boundary, wherein one part is the first light guide part, and the other part is the second light guide part, and the second light guide part is the first light guide part along the direction of the photosensitive drum 20. In the structure extending in the length direction, the first light guiding part and the second light guiding part can be integrally formed. The light emitted from the first light guide part can be irradiated onto the photosensitive drum 20 , while the light emitted from the second light guide part can be irradiated onto the detection element 5 .

As shown in Figure 4, when the photosensitive drum 20 and the magnetic member 21 rotate, the electricity dissipating member 1 emits light and irradiates the emitted light to the light concentrating member 302, and the light concentrating member 302 converges the light to the light guide bar 301, and the light guide bar 301 The light is guided so that the light emitted from the first light guide part of the light guide bar 301 is irradiated onto the photosensitive drum 20 and the light emitted from the second light guide part of the light guide bar 301 is irradiated onto the detection element 5 . When the light irradiates on the detection element 5 , the optical characteristics of the detection element 5 are changed. The detection part 5 generates a detection current under the irradiation of light, and transmits the detection current to the processing box chip 6, and the light detection circuit of the processing box chip 6 converts the detection current into an analog voltage, and outputs the analog voltage to the main control chip.

As an optional solution, as shown in Figure 4, the process cartridge also includes a cleaning blade, the cleaning blade includes a transparent rubber strip 304 and a metal part, the transparent rubber strip 304 is arranged on the side of the light guide strip 301 close to the photosensitive drum 20, For example, the material of the transparent adhesive strip 304 is PU. The light emitted from the light guide strip 301 is irradiated to the outer surface of the photosensitive drum 20 through the transparent rubber strip 304 . It should be noted that the metal parts are not specifically shown in FIG. 4 , and the location of the metal parts will not affect the propagation of light.

Fig. 5 is a schematic structural diagram of another imaging assembly provided by an embodiment of the present invention. Fig. 6 is a schematic structural diagram of the magnetic induction element and the current dissipating element in Fig. 5. As shown in Fig. 5 and Fig. 6, the imaging assembly in this embodiment On the basis of the imaging assembly shown in FIG. 4 , a magnetic induction element 2 is also included. The magnetic induction element 2 cooperates with the magnetic element 21 , and the magnetic induction element 2 generates an induced current through the relative displacement between the magnetic induction element 2 and the magnetic element 21 .

The current dissipating element 1 is electrically connected to the magnetic induction element 2 , and the magnetic induction element 2 transmits an induced current to the current dissipating element 1 , and the current dissipating element 1 is used for dissipating electricity from the photosensitive drum 20 .

The imaging assembly also includes a drive circuit 4 , and the magnetic induction element 2 is electrically connected to the current dissipating element 1 through the drive circuit 4 .

The imaging assembly also includes a carrier 3 on which the magnetic induction element 2 and the driving circuit 4 are both arranged. As shown in Figure 6, the magnetic induction element 2 and the drive circuit 4 are arranged on the carrier 3, the positive phase end (+) and the negative phase end (-) of the magnetic induction element 2 are connected to the input end of the drive circuit 4, and the output of the drive circuit 4 The end is connected to the power dissipator 1. As shown in FIG. 6 , the power dissipating element 1 is disposed on the carrier 3 .

As shown in FIG. 5 and FIG. 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 disposed on the body portion 31 , and the driving circuit 4 is disposed on the extension portion 32 . Wherein, part of the structure of the extension part 32 is disposed on the body part 31 , and another part of the extension part 32 extends out of the body part 31 . The current dissipating element 1 is arranged at one end of the extension part 32 extending out of the body part 31 , therefore, the dissipating element 1 is arranged outside the main body part 31 , and the position of the dissipating device 1 can be adjusted by adjusting the length of the extending part 32 .

As shown in FIG. 6 , there are multiple magnetic induction elements 2 , and the plurality of magnetic induction elements 2 are arranged around the central point of the body part 31 and arranged in sequence along the circumference of the central point of the main body part 31 . The shape of the body part 31 can be set according to product design needs, for example, the shape of the cross section of the body part 31 can be circular or square, as shown in Figure 5, in the embodiment of the present invention, for matching the driving part of the photosensitive drum 20 Shape design, the cross-section of the body part 31 is circular. Preferably, FIG. 6 shows six magnetic induction elements 2 , and the six magnetic induction elements 2 are evenly arranged around the central point of the body part 31 . Each magnetic induction element 2 includes a positive phase terminal (+) and a negative phase terminal (-), and the positive phase terminal (+) and negative phase terminal (-) of each magnetic induction element 2 are connected to the input end of the drive circuit 4, It should be noted that in FIG. 6 , the connection lines between the positive phase terminal (+) and the negative phase terminal (−) of the magnetic induction element 2 and the driving circuit 4 are not specifically drawn.

As shown in FIGS. 5 and 6 , the carrier 3 is a flexible printed circuit (FPC), and the body part 31 and the extension part 32 are both FPCs. The magnetic induction part 2 is a magnetic induction coil, and a plurality of printed circuit board (Printed Circuit Board, PCB) coils are uniformly and densely etched on the body part 31, and the PCB coils are used as the magnetic induction coil; the drive circuit 4 can be miniaturized and designed, and SMD the driving circuit 4 on the extension part 32 . In the embodiment of the present invention, the circuit board adopts the flexible circuit board to realize the flat design of the power dissipating element 1, thereby reducing the structural space of the process box.

As shown in FIG. 6 , the driving circuit 4 includes a rectification and filtering circuit. The magnetic induction element 2 can generate an induced electromotive force E, for example, a plurality of magnetic induction elements 2 can generate n induced electromotive forces, and the n induced electromotive forces include induced electromotive forces E1, E2, . . . , En, where n is a positive integer. The rectification and filtering circuit rectifies and filters the induced electromotive force generated by the magnetic induction element 2 to form a DC power supply voltage, and outputs the DC power supply voltage to the power dissipating element 1, and the power dissipating element 1 emits light under the drive of the DC power supply voltage. As an optional solution, the power dissipating element 1 is an LED.

The number of magnetic elements 21 and the number of magnetic induction elements 2 may be the same or different. In the embodiment of the present invention, eight magnetic elements 21 and six magnetic induction elements 2 are taken as an example for description. As shown in Figure 2, Figure 5 and Figure 6, the magnetic part 21 can be embedded in the driving part 22, when the driving part 22 rotates, the magnetic part 21 and the photosensitive drum 20 rotate around the same axis, and the magnetic part 21 generates a magnetic field when rotating, The magnetic induction element 2 cuts the magnetic field to generate an induced electromotive force, that is, the magnetic induction element 2 cuts the magnetic field to generate an induced current.

As shown in FIGS. 5 and 6 , the carrier 3 is arranged opposite to the first end of the photosensitive drum 20 so that the magnetic induction element 2 is opposite to the magnetic element 21 , specifically, the body portion 31 of the carrier 3 is opposite to the first end of the photosensitive drum 20 Relatively arranged so that the magnetic induction element 2 and the magnetic element 21 are oppositely arranged. The end of the extension part 32 of the carrier 3 where the dissipating element 1 is provided extends to the light incident place of the light guide bar 301 , so that the dissipating element 1 is disposed at the light incident place of the light guide bar 301 . It should be noted that the magnetic induction element 2 is not specifically shown in FIG. 5 .

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

The imaging assembly also includes a casing on which the photosensitive drum 20 is rotatably mounted and the magnetic induction element 2 is disposed on the casing. When the photosensitive drum 20 rotates, the magnetic element 2 and the magnetic induction element 21 move relative to each other to generate an induced current. It should be noted that the housing is not specifically drawn in the figure.

The following specific example will describe in detail the power dissipation method of the imaging component in the embodiment of the present invention. Fig. 7 is a flow chart of a power elimination method provided by the embodiment of the present invention, Fig. 8 is a schematic diagram of the working principle of the power eliminating device in the embodiment of the present invention, and Fig. 9 is a schematic diagram of the working principle of the rectification and filtering circuit in the embodiment of the present invention. The method for dissipating power of the imaging component will be described in detail below with reference to FIGS. 7 to 9 . As shown in Figure 7, the power elimination method includes:

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

As shown in FIGS. 6 and 8 , the driving component 22 rotates to drive the photosensitive drum 20 to rotate and to drive the magnetic member 21 to rotate. As the magnetic element 21 rotates, the magnetic induction element 2 and the magnetic element 21 are displaced relative to each other, so that the magnetic induction element 2 generates an induced current.

Specifically, as shown in FIG. 5, FIG. 6 and FIG. 8, when the magnetic member 21 rotates, a changing magnetic field is generated, 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, in other words, The magnetic induction element 2 cuts the lines of force in the magnetic field to generate an induced current, wherein the induced current is an alternating current.

As an optional solution, as shown in FIG. 5 and FIG. 8 , the driving circuit 4 includes a rectification and filtering circuit, and the power dissipating element 1 is an LED. Then the driving circuit 4 rectifies and filters the induced current to generate a power supply voltage VCC, wherein the power supply voltage is a DC power supply voltage. The drive circuit 4 provides power to the current dissipating element 1 through the power supply voltage VCC, so that the magnetic induction element 2 outputs an induced current to the current dissipating element 1 through the driving circuit 4 . Specifically, as shown in FIG. 8, the driving circuit 4, the current limiting resistor R and the power dissipating element 1 are connected in series, the driving circuit 4 outputs the power supply voltage VCC, and supplies power to the dissipating element 1 through the current limiting resistor R, thereby realizing the magnetic induction element 2. Output the induction current to the current dissipating device 1 through the drive circuit 4 to drive the dissipating device 1 to emit light.

In addition, the drive circuit 4 may also include an amplification circuit and/or a voltage stabilization circuit, capable of amplifying and stabilizing the current.

As shown in Fig. 5, Fig. 6 and Fig. 9, after the photosensitive drum 20 rotates one circle, the number n of induced electromotive force E generated by the magnetic induction element 2 is a × b, wherein, a is the number of the magnetic induction element 2, and b is The number of magnetic pieces 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 then the driving circuit 4 filters the 2a×b induced electromotive forces E to obtain the supply voltage VCC. The greater the number of induced electromotive forces E per unit time, the more stable the output power supply voltage VCC after filtering. The induced electromotive force E is determined by the magnetic flux variation per unit time of the magnetic induction element 2, that is, E=ΔQ/Δt, where ΔQ is the magnetic flux variation, and ΔQ is related to the magnetic pole strength of the magnetic element 21 and the magnetic pole strength of the photosensitive drum 20. speed dependent. The amount of change in magnetic flux ΔQ is proportional to the rotational speed of the photosensitive drum 20. 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. The faster the rotational speed of the photosensitive drum 20, the The greater the induced electromotive force E (induced current), the stronger the light intensity of the emitted light from the current dissipating element 1 , and the higher the brightness of the emitted light. That is to say, the luminous brightness of the current dissipating element 1 is directly proportional to the rotation speed of the photosensitive drum 20 . For example, the faster the rotating speed of the photosensitive drum 20, the higher the luminance of the electricity dissipating part 1, the faster the speed of eliminating the residual charge on the outer surface of the photosensitive drum 20; or, the slower the rotating speed of the photosensitive drum 20 (for example, The image forming apparatus is in the intermittent printing mode or silent printing mode), the light intensity of the dissipating member 1 decreases as the rotation speed of the photosensitive drum 20 slows down, and the speed of dissipating the residual charge on the outer surface of the photosensitive drum 20 also decreases. Therefore, the light intensity of the current dissipating element 1 changes with the rotation speed of the photosensitive drum 20 , realizing the controllable brightness of the current dissipating element 1 . Thereby, the matching between the rotating speed of the photosensitive drum 20 and the degree of de-energization is realized, which effectively prevents the excessive de-energization of the photosensitive drum 20 by the de-energizer or the insufficient de-energization of the photo-sensitive drum 20, thereby enabling the de-energizer and the photosensitive drum to realize Match power elimination.

Step 104, the power dissipating element receives the induced current and starts up.

As an optional method, when the dissipating device 1 is an LED, the induced current is used to drive the dissipating device 1 to emit light, so as to start the dissipating device 1 .

Step 106 , the neutralizer eliminates the residual charge on the outer surface of the photosensitive drum.

As shown in FIG. 5 , the light emitted by the dissipating member 1 is irradiated onto the photosensitive surface of the photosensitive drum 20 to dissipate the residual charges on the outer surface of the photosensitive drum 20 . The light emitted by the power dissipating part 1 is irradiated to the light concentrating part 302, and the light concentrating part 302 gathers the light to the light guide bar 301, and the light guide bar 301 guides the light so that the light irradiates the outer surface of the photosensitive drum 20, and reflects The component 303 can reflect the excess light emitted by the light guide strip 301 back to the light guide strip 301, so that the light guide strip 301 can also irradiate the excess light to the photosensitive drum 20, and the residual charge on the outer surface of the photosensitive drum 20 is absorbed by the light. uniform conduction, so as to realize the elimination of residual charges on the outer surface of the photosensitive drum 20 .

In the technical solution provided by the embodiment of the present invention, the magnetic induction part and the magnetic part are relatively displaced so that the magnetic induction part generates an induced current, and the current elimination part receives the induced current and starts, and the current elimination part eliminates the residual charge on the outer surface of the photosensitive drum, The power dissipating part can dissipate electricity to the photosensitive drum without additional power supply, thereby reducing the occupied space of the dissipating part, and the structure of the dissipating part is simple, adopting a passive design, and no external power supply is required; the magnetic induction part and the magnetic part During the relative displacement, the magnetic induction part generates an induced current to drive the current elimination part to eliminate electricity. Therefore, the degree of electricity elimination of the current elimination part changes with the relative displacement speed of the magnetic induction part and the magnetic part, thus realizing the relative displacement between the magnetic induction part and the magnetic part. The matching of the displacement speed and the degree of de-energization effectively prevents the phenomenon of excessive or insufficient de-energization of the photosensitive drum by the de-energizer, and then realizes matching de-energization of the de-energizer and the photosensitive drum.

The embodiment of the present invention effectively prevents the excessive power dissipation of the photosensitive drum by the power-dissipating member, avoids the photo-fatigue phenomenon such as overcharging and over-discharging of the photosensitive drum, thereby improving the life of the photosensitive drum; the embodiment of the present invention effectively prevents the photosensitive drum from being damaged Insufficient power dissipation, avoiding the phenomenon of ghosting in printed images, thereby improving the quality of printed images.

In the technical solution of the embodiment of the present invention, the induced current generated by the magnetic induction element is proportional to the rotation speed of the photosensitive drum, and the light intensity of the current elimination element is proportional to the rotation speed of the photosensitive drum. Therefore, the light intensity of the electricity elimination element is proportional to the rotation speed of the photosensitive drum. Speed matching, so that the dark decay curve of the power dissipating part and the photosensitive drum can also match, so that the outer surface of the photosensitive drum can effectively dissipate electricity, thereby improving the charge and discharge capacity of the photosensitive drum, preventing ghosting and overcharging and overdischarging, etc. Fatigue phenomenon, prolonging the life of the photosensitive drum.

In the technical solution of the embodiment of the present invention, the external surface of the photosensitive drum is eliminated by the passive electricity dissipating parts and the light guide strip, which reduces the residual charge on the outer surface of the photosensitive drum, reduces light fatigue, and thus avoids printing The ghosting phenomenon that occurs during the process improves the quality of the printed image.

Figure 10 is a schematic structural diagram of another imaging component provided by the embodiment of the present invention, as shown in Figure 10, the imaging component in this embodiment is based on the imaging component shown in Figure 5, and the carrier 3 also includes a power recovery device 33. The power recovery device 33 is electrically connected to the magnetic induction part 2 and the current dissipating part 1 respectively, and the magnetic induction part 2 transmits the induced current to the power dissipating part 1 through the power recovery device 33. Store the induced current or prevent the induced current from being delivered to the power dissipating part 1 when the power is eliminated.

An extension of the carrier 3 may be a selector switch 32 . The selective switch 32 is connected to the first end a of the power recovery device 33 so that the power recovery device 33 is electrically connected to the magnetic induction element 2. The selective switch 32 can be set to charge the power recovery device 33 or prevent the induced current from being sent to the consumer. Electric component 1 , at this time, the photosensitive drum 20 does not need to be de-energized, and the power recovery device 33 stores the induced current or prevents the induced current from being delivered to the power-dissipating component 1 . Wherein, when the selective switch 32 is set to charge the power recovery device 33, the power recovery device 33 may be a storage battery or other energy storage devices. 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 power dissipating device 1. The selective switch 32 can be set to directly supply power to the power dissipating device 1. At this time, the magnetic induction device 2. The induced current can be sent to the power dissipating element 1 through the power recovery device 33.

During the imaging process, including charging, developing, and transferring, the photosensitive drum 20 needs to rotate to realize the operation of forming the developer image on the paper, but at this time the photosensitive drum 20 does not need to use the power dissipating member 1, when the image When the control unit controls the rotation of the drive part 22, the magnetic element 21 generates a magnetic field when it rotates, the magnetic induction element 2 cuts the lines of force in the magnetic field to generate an induced current, and the drive circuit continues to generate a supply voltage. This embodiment provides a power recovery device 33 to recover the power supply voltage generated by the rotation of the photosensitive drum 20 when the photosensitive drum 20 does not need the power dissipating member 1, so as to protect the photosensitive drum 20 and avoid damage to the photosensitive drum 20. Mis-discharge, overexposure or excessive discharge. Moreover, after the power recovery device 33 collects a certain amount of power, it can also provide a source of power for the power dissipating element 1 , saving energy consumption and increasing the power for the dissipating element 1 . Therefore, through the embodiment of the present invention, when the photosensitive drum 20 does not need the power dissipating element 1, the image forming control unit controls the selective switch to connect the power recovery device 33, so that the power supply voltage generated by the driving circuit can be recovered; When the photosensitive drum 20 needs to be de-energized by the de-energizing element 1 , the image forming control unit controls the selective switch to connect the de-energizing element 1 for direct power supply, so that the de-energizing element 1 performs matching de-energizing operation for the photosensitive drum 20 .

An embodiment of the present invention provides a process cartridge, which includes an imaging assembly, wherein the description of the imaging assembly can refer to the description of the embodiment in FIG. 1 to FIG. 10 , and will not be repeated here. The process cartridge is detachably mounted on the image forming device.

An embodiment of the present invention provides an image forming apparatus, and the image forming apparatus includes an imaging component. The description of the imaging component may refer to the description of the embodiments in FIG. 1 to FIG. 10 , which will not be repeated here.

An embodiment of the present invention provides another image forming device, the image forming device includes an imaging assembly, a main body and a detection part, wherein the imaging assembly may include a photosensitive drum and a magnetic part, and the magnetic part is displaced as the photosensitive drum rotates, The magnetic part is used to move relative to the magnetic induction part to generate an induced current when the photosensitive drum rotates, and the induced current is used to determine whether the imaging assembly meets expectations.

The imaging component is used for detachable installation on the main body, and the detection part is arranged on the main body. The detection part is used to output the detection current corresponding to the induced current. The detection current increases with the increase of the rotation speed of the photosensitive drum. The detection current is used for Determine if the imaging components are as expected.

The image forming assembly also includes a dissipating element, which is used to receive the induced current and dissipate the electricity on the outer surface of the photosensitive drum.

Wherein, the description of the imaging component can refer to the description of the embodiment in FIG. 1 to FIG. 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 all-in-one facsimile machines, and multifunction peripherals (Multifunction peripherals) that perform the above functions in a single device. -Functional Peripheral, MFP). The image forming apparatus includes an image forming control unit for controlling the image forming apparatus as a whole, and an image forming unit for forming developer such as toner stored in a cartridge based on image data and processing , forming an image on the conveyed paper under the control of the image forming control unit.

In the field of print imaging, process cartridges are used to contain developer. For example, if the processing box is an ink cartridge, and the developer is ink, the ink cartridge is used to hold the ink; Toner, the powder cartridge is used to hold the toner, and the powder cartridge is used to hold the toner.

In the technical solution of the process cartridge and the image forming apparatus provided by the embodiments of the present invention, the magnetic member is displaced with the rotation of the photosensitive drum, and the magnetic member is used to move relative to the magnetic induction member to generate an induced current when the photosensitive drum rotates. When the drum is not rotating, no induction current will be generated, so the induction current can represent whether the photosensitive drum is rotating, so as to realize whether the photosensitive drum is working normally through the induction current, the imaging group DD222639I

Parts are as expected, which in turn determines whether the process cartridge is as expected.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

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