Processing cartridge

Abstract

The present invention discloses a processing cartridge detachably installed in an electrophotographic apparatus. The processing cartridge includes: a developing roller and a toner cartridge for supporting the developing roller; a photosensitive drum and a waste toner cartridge for supporting the photosensitive drum. The toner cartridge is rotatably connected to the waste toner cartridge relative to the waste toner cartridge. The processing cartridge further includes a pushed portion and a first power receiving portion. The first power receiving portion receives a driving force for driving the pushed portion. The pushed portion receives the driving force of the first power receiving member to move the developing roller from a position separated from the photosensitive drum to a position in contact with the photosensitive drum. The processing cartridge of the present invention does not rely on a pushing structure outside the electrophotographic apparatus. By providing the pushed portion to receive the rotational driving force received by the first power receiving member from the electrophotographic apparatus, the toner cartridge can be driven to rotate to achieve contact between the developing roller and the photosensitive drum, making the compatibility and versatility of the processing cartridge better.

Description

Technical Field

[0001] The present invention belongs to the technical field of imaging devices, and particularly relates to a processing cartridge. Background Art

[0002] An electrophotographic imaging device is a device that forms an image on a recording material through electrophotographic imaging processing technology, such as: electrophotographic copiers, laser printers, electrophotographic printers, fax machines, word processors, etc. An electrophotographic imaging device generally includes a monochromatic electrophotographic imaging device and a color electrophotographic imaging device.

[0003] Existing electrophotographic imaging devices include a main body and a processing cartridge detachably installed in the main body. Side walls are provided at both ends of the processing cartridge along its length direction. The inside of the processing cartridge usually contains one or more rotating components, such as a photosensitive element, a developing element, a charging element, a powder feeding element, a gear component, etc. Such rotating components can receive driving force from a power receiving component. The power receiving component is usually provided on one side wall of the processing cartridge and rotates by receiving driving force from the main body of the electrophotographic imaging device.

[0004] In the prior art, in order to protect the processing cartridge, a structure for separating the roller and the drum is provided in the processing cartridge. That is, when the processing cartridge does not perform electrophotographic imaging work, in order to protect the developing element (developing roller) and the photosensitive element (photosensitive drum), the two are usually separated, that is, the developing element and the photosensitive element do not contact each other when electrophotographic imaging is not performed, and when electrophotographic imaging is required, the developing element (developing roller) and the photosensitive element (photosensitive drum) contact each other again to complete the imaging process. The processing cartridge thus arranged is generally divided into a developing cartridge (powder cartridge) containing a developing element (developing roller) and a waste powder cartridge containing a photosensitive element (photosensitive drum), and these two parts are rotatably connected.

[0005] Figure 1 is a schematic structural diagram of a color electrophotographic imaging device, Figure 2 is a schematic diagram of the principle of separating a set of processing cartridges installed in the color electrophotographic imaging device by the roller and the drum. As Figure 1 、 Figure 2 shown, the electrophotographic imaging device 900 includes a tray 910 for placing the processing cartridge, a first pushing portion 920 and a second pushing portion 930 for the roller-drum separation structure. When electrophotographic imaging is not performed, the first pushing portion 920 and the second pushing portion 930 push the developing cartridge (powder cartridge) or the waste powder cartridge of the processing cartridge, thereby separating the roller and the drum.

[0006] However, the positions of the pushing portions for the roller-drum separation are different for different models of electrophotographic imaging devices. As Figure 1In some cases, the position where the processing cartridge is pushed by the electrophotographic apparatus is located at the top of the processing cartridge; there are also cases where the pushing position is set at the bottom of the processing cartridge and other positions of the processing cartridge. Therefore, designing a solution that can be compatible with different models of electrophotographic apparatuses can effectively increase the production scale and reduce the production cost. Summary of the Invention

[0007] To solve the technical problem that the processing cartridge depends on the external pushing structure of the electrophotographic apparatus to achieve separation of the roller drum, the present invention provides a processing cartridge that is detachably installed in the electrophotographic apparatus, and the processing cartridge includes:

[0008] A developing roller and a powder hopper that supports the developing roller;

[0009] A photosensitive drum and a waste powder hopper that supports the photosensitive drum, and the powder hopper is rotatably connected to the waste powder hopper relative to the waste powder hopper;

[0010] It further includes a pushed part and a first power receiving component, the first power receiving component receives a driving force for driving the pushed part, and the pushed part receives the driving force of the first power receiving component to move the developing roller from a position separated from the photosensitive drum to a position in contact with the photosensitive drum.

[0011] Further, the pushed part is provided at one end of the powder hopper; when the pushed part receives the driving force from the first power receiving component, the pushed part drives the powder hopper to rotate relative to the waste powder hopper so that the developing roller moves from a position separated from the photosensitive drum to a position in contact with the photosensitive drum.

[0012] Further, the pushed part and the first power receiving component are provided at the same end in the length direction of the powder hopper.

[0013] Further, it further includes a bracket for supporting the pushed part, the bracket is provided at one end in the length direction of the powder hopper and is fixedly connected to the powder hopper; after the pushed part receives the driving force from the first power receiving component, it drives the powder hopper to rotate through the bracket so that the developing roller moves from a position separated from the photosensitive drum to a position in contact with the photosensitive drum.

[0014] Further, the pushed part includes a force receiving wheel and a damping bearing, the damping bearing is connected to the powder hopper, the force receiving wheel is rotatably sleeved on the damping bearing, and when the force receiving wheel rotates by receiving the driving force of the first power receiving component, the resistance generated between the damping bearing and the force receiving wheel can drive the powder hopper to rotate.

[0015] Further, the pushed part further includes a fixed shaft fixedly connected to the bracket, the damping bearing is sleeved on the fixed shaft, and the resistance received by the force receiving wheel when rotating in a preset direction is greater than the resistance when rotating in the opposite direction of the preset direction.

[0016] Further, the outer circumferential surface of the force receiving wheel interacting with the first power receiving component is a helical gear structure or a friction surface.

[0017] Further, the pushed part further includes an adjusting part, and the adjusting part is inserted into the damping bearing to adjust the interference fit degree between the damping bearing and the force receiving wheel.

[0018] Further, the pushed part includes a pushed part elastic member and a reed for pushing the force receiving wheel to contact the bracket; the pushed part elastic member is restricted between the reed and the force receiving wheel.

[0019] Further, an elastic member is further included. When the first power receiving component does not receive the rotational driving force from the electrophotographic device, the elastic member separates the developing roller from the photosensitive drum.

[0020] Further, the elastic member is a compression spring or a tension spring. The elastic member is arranged between the powder cartridge and the waste powder cartridge, one end of the elastic member is connected to the powder cartridge, and the other end is connected to the waste powder cartridge; or, the elastic member is a coil spring or a torsion spring, one end of the elastic member is connected to an end cover fixedly connected to the waste powder cartridge, and the other end is connected to the powder cartridge.

[0021] Advantages of the present invention: The processing cartridge of the present invention does not rely on a pushing structure outside the electrophotographic device. By setting a pushed part to receive the rotational driving force received by the first power receiving component from the electrophotographic device, the powder cartridge can be driven to rotate to make the developing roller contact the photosensitive drum, so that the compatibility and versatility of the processing cartridge are better. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a color electrophotographic device in the prior art;

[0023] Figure 2 It is a schematic principle diagram of a group of processing cartridges installed in the color electrophotographic device being separated by a roller and a drum in the prior art.

[0024] Figure 3 It is a three-dimensional view of the processing cartridge in the first embodiment of the present invention;

[0025] Figure 4 It is an exploded view of the positional relationship between the end cover and the processing cartridge in the first embodiment of the present invention;

[0026] Figure 5Exploded view of the positional relationship between the cover plate and the processing cartridge in Embodiment 1 of the present invention;

[0027] Figure 6 Schematic structural view of the processing cartridge observed from one end in the length direction of the processing cartridge in Embodiment 1 of the present invention;

[0028] Figure 7 Exploded view of the end cap of the processing cartridge in Embodiment 2 of the present invention;

[0029] Figure 8 Exploded view of the structure of the first power receiving member after the end cap of the processing cartridge is removed in Embodiment 2 of the present invention;

[0030] Figure 9 A pushed portion structure provided in Embodiment 2 of the present invention. Detailed implementation manners

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Embodiment 1

[0033] This embodiment provides a processing cartridge capable of separating and contacting a roller drum (i.e., a developing roller and a photosensitive drum), which can complete the contact and separation of the roller drum without relying on a pushing mechanism for drum-roller separation in an electrophotographic imaging device, and can complete the contact and separation of the roller drum by receiving a driving force or not receiving a driving force from the electrophotographic imaging device.

[0034] As Figures 3 - 6 shown, the processing cartridge includes a toner cartridge A10, a waste toner cartridge A20, an end cap A30, a first power receiving member A11, a cover plate A12, a pushed portion A13, a developing roller A14, a bracket A15, a second power receiving member A21, and a photosensitive drum A22; there are two end caps A30, which are respectively located at both ends in the length direction of the processing cartridge. The toner cartridge A10 and the waste toner cartridge A20 are located between the two end caps A30. The two end caps A30 support the toner cartridge A10 and the waste toner cartridge A20. The end cap A30 is fixedly connected to the waste toner cartridge A20. The toner cartridge A10 is rotatably connected to the waste toner cartridge A20 relative to the waste toner cartridge A20. An elastic member A31 for forcing the developing roller A14 and the photosensitive drum A22 to separate is further provided between the toner cartridge A10 and the waste toner cartridge A20. Specifically, such as a tension spring, the tension spring is provided on the side of the processing cartridge away from the developing roller and the photosensitive drum, and its two ends are respectively connected to the toner cartridge A10 and the waste toner cartridge A20. Optionally, the elastic member A31 can also be a compression spring, and the two ends of the compression spring are respectively connected to the toner cartridge A10 and the waste toner cartridge A20 and are provided on the side of the processing cartridge away from the developing roller and the photosensitive drum.

[0035] The toner cartridge A10 is used to store a developer (such as toner) and, during the printing operation of the processing cartridge, transfer the developer to the photosensitive drum A22 through a toner feeding roller (not shown in the figure) and a developing roller A14, so that the electrostatic latent image formed on the surface of the photosensitive drum A22 is developed and transformed into a developed image. The toner cartridge A10 is provided with a first power receiving member A11 and a developing roller A14. The first power receiving member A11 is arranged on the outer side surface at one end of the toner cartridge A10 in the length direction. The length direction of the toner cartridge A10 is the same as the length direction of the processing cartridge. A part of the first power receiving member A11 can be exposed from the end cap A30. The first power receiving member A11 is preferably a twisted protrusion structure or can also be a helical gear structure, as long as it can receive a driving force from the imaging device. In the state where the processing cartridge is installed in an electrophotographic device (such as a laser printer), the first power receiving member A11 can receive a rotational driving force from the electrophotographic device. The developing roller A14 is rotatably supported on the toner cartridge A10 and can move along with the movement of the toner cartridge A10. The rotational axis direction of the developing roller A14 is the same as the length direction of the toner cartridge A10. The developing roller A14 can be connected to the first power receiving member A11 directly or indirectly, so that the rotational driving force of the electrophotographic device is indirectly transmitted to the developing roller A14, causing the developing roller A14 to rotate and transfer the developer.

[0036] The waste toner cartridge A20 is provided with a second power receiving member A21 and a photosensitive drum A22. The second power receiving member A21 is arranged at one end of the photosensitive drum A22 in the length direction or can also be arranged on the outer side surface at one end of the waste toner cartridge A20 in the length direction. The length of the photosensitive drum A22 and the length direction of the waste toner cartridge A20 are the same as the length direction of the processing cartridge. A part of the second power receiving member A21 can be exposed from the end cap A30. The second power receiving member A21 is preferably constructed as a twisted protrusion structure. In the state where the processing cartridge is installed in an electrophotographic device, the second power receiving member A21 can receive a rotational driving force from the electrophotographic device. The photosensitive drum A22 is rotatably supported in the waste toner cartridge A20. The rotational axis direction of the photosensitive drum A22 is the same as the length direction of the waste toner cartridge A20. The photosensitive drum A22 can be connected to the second power receiving member A21 directly or indirectly, so that the rotational driving force of the electrophotographic device is indirectly transmitted to the photosensitive drum A22; after the processing cartridge completes one printing operation, a cleaning device (not shown in the figure) provided in the waste toner cartridge A20 scrapes off the residual developer attached to the surface of the photosensitive drum A22 and transports it into the waste toner cartridge A20.

[0037] In this embodiment, the first power receiving member A11 and the second power receiving member A21 are located at the same end of the processing cartridge. The waste toner bin A20 is fixedly connected to the end cap A30. The toner cartridge A10 is supported by the end cap A30 and can swing within a certain range, that is, the toner cartridge A10 can swing relative to the waste toner bin A20. Specifically, it swings between a position close to the waste toner bin A20 and a position far from the waste toner bin A20. During this swinging process, there is at least one position where the photosensitive drum A22 contacts the developing roller A14.

[0038] As Figure 4 and 5 shown, the cover plate A12 is arranged inside the end cap A30 and is fixedly connected to the end cap A30. Specifically, it is arranged inside the end cap A30 at the same end as the first power receiving member A11 and the second power receiving member A21. During the separation of the roller drum or the process from separation to contact, the cover plate A12 can move relative to the toner cartridge A10.

[0039] Furthermore, a first through hole A121 is also provided on the cover plate A12 to limit the degree of freedom of the pushed part A13. Specifically, the pushed part A13 can pass through the first through hole A121, and the movement of the pushed part A13 is restricted by the first through hole A121. That is, during the separation of the roller drum, the swinging range of the toner cartridge A10 is also restricted by the first through hole A121. The first through hole A121 is preferably configured as a strip-shaped hole or an arc-shaped hole.

[0040] Optionally, the cover plate A12 and the end cap A30 can be of a split structure or an integral structure.

[0041] As Figure 6 shown, the bracket A15 is used to support the pushed part A13. The bracket A15 is fixedly connected to the toner cartridge A10. Specifically, it is fixedly arranged on the outer side surface of one end of the toner cartridge A10 along the length direction and is at the same end of the toner cartridge A10 as the first power receiving member A11. The bracket A15 is located between the toner cartridge A10 and the cover plate A12. The bracket A15 can be fixed to the toner cartridge A10 by means of clamping, pasting, etc. Optionally, the bracket A15 can also be integrally provided with the toner cartridge A10.

[0042] In some other embodiments, the bracket A15 can be omitted, and the pushed part A13 can be provided on the toner cartridge A10 in a split or integral manner.

[0043] As Figures 4 - 6As shown, the pushed part A13 is arranged on the bracket A15. After receiving the rotational driving force of the electro-imaging device, the pushed part A13 can move the developing roller A14 from the position separated from the photosensitive drum A22 to the position in contact with the photosensitive drum A22, that is, after the pushed part A13 receives the driving force of the first power receiving member A11, the processing cartridge is changed from the state of being separated from the roller drum to the state of being in contact with the roller drum. Specifically, after the pushed part A13 contacts the first power receiving member A11 and receives the rotational driving force, the powder cartridge A10 is driven by the bracket A15 to rotate in the direction close to the waste powder cartridge A20, so that the developing roller A14 completes the contact with the photosensitive drum A22. Preferably, the pushed part A13 includes a force receiving wheel A131, a damping bearing A132 and a fixed shaft A133. The fixed shaft A133 is fixedly arranged on the outer side surface of the bracket A15, and the fixed shaft A133 protrudes from the outer side surface of the bracket A15 in the direction away from the outer side surface of the bracket A15; the fixed shaft A133 can be integrally arranged with the bracket A15 or can be separately arranged and fixed on the outer side surface of the bracket A15 by means of clamping, pasting, etc. The damping bearing A132 is sleeved on the fixed shaft A133, and the damping bearing A132 is relatively fixedly arranged with the fixed shaft A133. The damping bearing A132 can be selected from elastic rubber and cotton glue. The force receiving wheel A131 is rotatably supported on the outer circumferential surface outside the damping bearing A132. The rotation axis direction of the force receiving wheel A131 is parallel to the rotation axis direction of the developing roller A14. The outer circumferential surface of the force receiving wheel A131 contacts the outer circumferential surface of the first power receiving member A11 to receive the driving force of the first power receiving member A11 and rotate; preferably, the outer circumferential surface of the force receiving wheel A131 and the outer circumferential surface of the first power receiving member A11 are of a helical gear structure (i.e., a gear).

[0044] The pushed part A13 may further include adjusting parts, such as screws, inserts, pins, etc. The adjusting parts are used to adjust the interference fit degree between the damping bearing and the force receiving wheel. For example, the screw is arranged at one end of the damping bearing A132. When the screw is tightened, the interference fit degree between the damping bearing A132 and the force receiving wheel A131 increases, and the frictional force received by the force receiving wheel A131 during rotation increases, and vice versa. The setting of this structure is beneficial to adjusting the frictional force between the damping bearing A132 and the force receiving wheel A131, and further adjusting the force required by the powder cartridge A10.

[0045] When the force receiving wheel A131 receives the driving force of the first power receiving member A11 and rotates in one direction (such as the clockwise direction), a large resistance (frictional force) is generated between the force receiving wheel A131 and the damping bearing A132. This resistance can generate torsion on the pushed part A13, the bracket A15 supporting the pushed part A13, and the powder cartridge A10 fixedly connected to the bracket A15, so as to drive the entire powder cartridge A10 to rotate relative to the waste powder cartridge A20, and move the developing roller A14 from the position separated from the photosensitive drum A22 to the position in contact with the photosensitive drum A22.

[0046] Optionally, it can be set such that when the force-bearing wheel A131 rotates in the other direction (e.g., counterclockwise), the frictional force between the force-bearing wheel A131 and the damping bearing A132 is small (or a similar ratchet structure is adopted).

[0047] Reference Figure 6 , during the process of the processing cartridge transitioning from the initial state of separation from the roller drum to the state of contact with the roller drum, the cooperation relationship among components such as the first power receiving member A11, the pushed portion A13, and the powder cartridge A10 can be that the first power receiving member A11 meshes with the driving member of the electrophotographic device and receives a driving force to rotate in the clockwise direction. The force-bearing wheel A131 of the pushed portion A13 receives a driving force to rotate in the counterclockwise direction, and a frictional force is generated between the damping bearing A132 and the force-bearing wheel A131. As a result, under the action of the driving force torque, the pushed portion A13 drives the powder cartridge A10 to rotate relative to the waste powder cartridge A20 until the pushed portion A13 is restricted by the first through hole A121. The developing roller A14 moves from the position separated from the photosensitive drum A22 to the position in contact with the photosensitive drum A22, and development operation can be performed. Additionally, after the pushed portion A13 is restricted by the first through hole A121 (specifically, the part of the fixed shaft A133 extending into the first through hole A121 moves in the first through hole A121 to achieve the restriction of the pushed portion A13), the force-bearing wheel A131 can rotate in a state where there is resistance with the damping bearing A132.

[0048] Optionally, such a fixed shaft A133 can be selected to have an irregular circumferential surface, such as a cam structure.

[0049] Optionally, the outer circumferential surface of the damping bearing A132 can be a friction surface, such as a rubber surface, etc. Correspondingly, a friction surface that cooperates with the damping bearing A132 is also provided on the first power receiving member A11 to be able to transmit a driving force to the damping bearing A132.

[0050] In some other embodiments, a ratchet structure can also be used to replace the damping bearing A132, which can achieve the effect of generating a large resistance on the force-bearing wheel in one direction and a small resistance in the other direction, thereby facilitating the return of the developing roller A14 to the separated position more easily after moving to the position in contact with the photosensitive drum A22.

[0051] Alternatively, in some other embodiments, the pushed part A13 may also omit the structure of the force-receiving wheel A131. The damping bearing A132 directly contacts the first power-receiving component A11 to receive the driving force. The damping bearing A132 is configured to be rotatable relative to the fixed shaft A133. When the damping bearing A132 rotates in one direction, a large resistance is generated between the damping bearing A132 and the fixed shaft A133 to drive the entire powder cartridge A10 to rotate relative to the waste powder cartridge A20. Specifically, the powder cartridge A10 rotates in the direction close to the waste powder cartridge A20, so that the developing roller A14 contacts the photosensitive drum A22.

[0052] Furthermore, an elastic member A31 is provided between the powder cartridge A10 and the waste powder cartridge A20, so that when the first power-receiving component A11 does not receive the rotational driving force transmitted by the electrophotographic apparatus, the processing cartridge is in a state where the roller and the drum are separated, that is, the developing roller A14 does not contact the photosensitive drum A22. Preferably, the elastic member A31 is a compression spring, one end of which is connected to the powder cartridge A10 and the other end is connected to the waste powder cartridge A20. When the rotational driving force received by the first power-receiving component A11 is transmitted to the pushed part A13 and drives the powder cartridge A10 to move toward the waste powder cartridge A20 to make the developing roller A14 contact the photosensitive drum A22, the elastic member A31 is compressed. When the first power-receiving component A11 does not receive the rotational driving force of the electrophotographic apparatus, the elastic member A31 deforms and recovers, pushing the powder cartridge A10 to move away from the waste powder cartridge A20, so that the developing roller A14 is separated from the photosensitive drum A22. Alternatively, the elastic member A31 may also be set as a tension spring, a spring sheet, an elastic rubber, etc., and the same effect can be achieved.

[0053] For the processing cartridge in the state where the roller and the drum are separated, when the first power-receiving component A11 does not receive the rotational driving force transmitted by the electrophotographic apparatus, the powder cartridge A10 rotates relative to the waste powder cartridge A20 under the elastic restoring force of the elastic member A31, and the pushed part A13 returns to the initial state under the drive of the powder cartridge A10. Since the resistance received by the pushed part A13 in the other direction is small, it helps the pushed part A13 to return to the initial state (i.e., the state where the roller and the drum are separated) when the first power-receiving component A11 does not receive the rotational driving force transmitted by the electrophotographic apparatus.

[0054] Alternatively, multiple elastic members A31 may be provided and respectively arranged at different positions between the powder cartridge A10 and the waste powder cartridge A20.

[0055] It should be noted that when the force-receiving wheel A131 receives the driving force of the first power-receiving component A11 and rotates in one direction, the torque generated by the resistance between the force-receiving wheel A131 and the damping bearing A132 on the entire powder cartridge A10 is greater than the elastic restoring force of the elastic member A31.

[0056] Optionally, the first power receiving component A11 can be an intermediate gear that receives driving force from other rotating components of the processing cartridge, such as receiving driving force from a component that meshes with the electrophotographic device, receiving driving force from the toner supply roller gear, etc.

[0057] In the processing cartridge of this embodiment, by setting the pushed portion A13 to receive the driving force of the first power receiving component A11 and then driving the powder cartridge A10 to rotate so that the developing roller A14 contacts the photosensitive drum A22, it does not rely on the pushing structure (or separating mechanism) of the electrophotographic device to achieve drum-roller separation. The processing cartridge can be compatible with different models of electrophotographic devices, improving the compatibility and versatility of the processing cartridge, effectively increasing the production scale, and reducing the production cost.

[0058] Embodiment Two

[0059] In this embodiment, some parts are further simplified on the basis of Embodiment One, and alternative solutions are also provided for some structures.

[0060] Such as Figure 7 As shown, the elastic member B31 for maintaining the processing cartridge in a drum-roller separated state without receiving the rotational driving force transmitted by the electrophotographic device can be a coil spring. Specifically, one end of the elastic member B31 is connected to the end cap B30, and the other end is connected to the powder cartridge B10, that is, the elastic member B31 is located between the inner side surface of the end cap B30 and the outer side surface of one end of the powder cartridge B10. Preferably, the elastic member B31 and the first power receiving component B11 are located at the same end of the powder cartridge B10. In the natural state of the elastic member B31, the powder cartridge B10 and the waste powder cartridge B20 are maintained at a position where the photosensitive drum B22 and the developing roller B14 are in a separated state. When the rotational driving force received by the first power receiving component B11 is transmitted to the pushed portion B13 and then drives the powder cartridge B10 to move, causing the developing roller B14 to contact the photosensitive drum B22, the elastic member B31 deforms; that is, it is compressed. When the first power receiving component B11 does not receive the rotational driving force of the electrophotographic device, the deformation of the elastic member B31 recovers, pushing the powder cartridge B10 in a direction away from the waste powder cartridge B20, causing the developing roller B14 to separate from the photosensitive drum B22.

[0061] Optionally, one end of the elastic member B31 can be connected to the end cap B30, and the other end can be connected to the bracket B15; one end of the elastic member B31 can be connected to the fixed shaft B134, and the other end can be connected to the end cap B30.

[0062] Optionally, the elastic member B31 can also be located at a different end of the powder cartridge B10 from the first power receiving component B11.

[0063] Optionally, the elastic member B31 can also use a torsion spring with a similar setting instead of the coil spring, and it can also play the same role.

[0064] Optionally, the elastic member B31 may include both a compression spring and a coil spring.

[0065] As Figure 8 shown, the support B15 is further provided with a support hole B151 and a second through hole B152. The first power receiving member B11 is rotatably supported by a support shaft B101 provided on the powder cartridge B10. The support shaft B101 is provided on the outer side surface of one end of the powder cartridge B10, and the support shaft B101 protrudes from the outer side surface of one end of the powder cartridge B10 in a direction away from the outer side surface of the powder cartridge B10. Different from the first embodiment, in this embodiment, the first power receiving member B11 is also constrained by the support hole B151 on the support B15. After being supported and constrained, the first power receiving member B11 can rotate freely relative to the powder cartridge B10, that is, the support shaft B101, the first power receiving member B11 and the support hole B151 are coaxially arranged. A part of the gear portion of the first power receiving member B11 is exposed from the second through hole B152 of the support B15, and the pushed portion B13 can be engaged with the first power receiving member B11 through the second through hole B152. When the first power receiving member B11 rotates, on the one hand, the first power receiving member B11 is engaged with a plurality of rotating rollers on the powder cartridge (such as the developing roller B14, the powder feeding roller, etc.) to drive these rotating rollers to rotate. On the other hand, the first power receiving member B11 is engaged with the pushed portion B13, and the powder cartridge B10 is driven to move in the direction of the waste powder cartridge B20 through the transmission of the pushed portion B13, so that the developing roller B14 is in contact with the photosensitive drum B22. Preferably, the pushed portion B13 is rotatable and is installed on the fixed shaft B153 of the support B15 with damping. After the installation is completed, the support B15 is fixedly installed on the outer side surface of one end of the powder cartridge B10. Preferably, the method selected in this embodiment is to use an inverted buckle to connect the support B15 and the powder cartridge B10.

[0066] Optionally, as Figure 8 shown, helical teeth are provided on the outer circumferential surface of the first power receiving member B11, and corresponding helical teeth are provided on the outer circumferential surface of the pushed portion B13 that are engaged with the helical teeth on the outer circumferential surface of the first power receiving member B11. Through the meshing process between the helical teeth, the pushed portion B13 can move in the direction close to the waste powder cartridge B20 under the action of the force of the first power receiving member B11, thereby driving the powder cartridge B10 to move in the direction close to the waste powder cartridge B20. As a result, the developing roller B14 and the photosensitive drum B22 are in contact.

[0067] As Figure 9 shown, this embodiment also discloses a pushed portion B13. Of course, various pushed portions in the first embodiment can also be used for replacement, but the overall cost of the pushed portion B13 in this embodiment is lower.

[0068] The pushed part B13 may include a fixed shaft B134 fixedly arranged on the bracket B15, a reed B131 fixed on the fixed shaft B134, a force-receiving wheel B133 rotatably supported by the fixed shaft B134, and a pushed part elastic member B132 that pushes the force-receiving wheel B133 into contact with the bracket B15. The force-receiving wheel B133, the pushed part elastic member B132, and the reed B131 are arranged in sequence along the direction away from the outer surface of the bracket B15, that is, the force-receiving wheel B133 is closer to the outer surface of the bracket B15 than the reed B131. The pushed part elastic member B132 is restricted between the force-receiving wheel B133 and the reed B131. The elastic expansion and contraction direction of the pushed part elastic member B132 is along the axial direction of the force-receiving wheel B133. The pushed part elastic member B132 is preferably a compression spring and is constructed to always be in a compressed state and always apply a force to the force-receiving wheel B133. The gear part of the force-receiving wheel B133 is preferably a helical gear structure and can be meshed with the gear part of the first power receiving member B11 through the second through hole B152, so as to receive the rotational driving force of the first power receiving member B11 and rotate. During the process of the force-receiving wheel B133 meshing with and rotating with the first power receiving member B11, a torsion force acting on the entire powder cartridge B10 can be generated, forcing the powder cartridge B10 to rotate in the direction close to the waste powder cartridge B20, so that the developing roller B14 contacts the photosensitive drum B22. In addition, a frictional force can also be generated between the force-receiving wheel B133 and the bracket B15. Specifically, the end face in the axial direction of the force-receiving wheel B133 contacts the outer surface of the bracket B15 to generate a frictional force. Preferably, the elastic force of the pushed part elastic member B132 is used to push the force-receiving wheel B133 and the bracket B15 to rub against each other, thereby generating a frictional force.

[0069] When the processing cartridge is installed in the electrophotographic apparatus and the electrophotographic apparatus drives the first power receiving member B11 to rotate, a plurality of rotating rollers meshed with the first power receiving member B11 start to rotate self-driven. At the same time, the force-receiving wheel B133 meshed with the first power receiving member B11 also starts to rotate, generating a torsion force on the powder cartridge B10 to drive the powder cartridge B10 to rotate, and completing the contact between the developing roller B14 and the photosensitive drum B22. Synchronously, due to the push of the pushed part elastic member B132, a frictional force is generated between the force-receiving wheel B133 and the bracket B15, thereby driving the bracket B15 and even the entire powder cartridge B10 to move in the direction of the waste powder cartridge B20, and completing the contact between the developing roller B14 and the photosensitive drum B22. After that, the first power receiving member B11 continues to rotate, and the tendency of the powder cartridge B10 to move towards the waste powder cartridge B20 generates a relative pressure between the developing roller B14 and the photosensitive drum B22, ensuring that the developing roller B14 can smoothly coat the developer on the photosensitive drum B22 during the printing process.

[0070] The pushed part elastic member B132 is provided to generate a frictional force between the force receiving wheel B133 and the bracket B15 as an additional force to drive the toner cartridge B10 to rotate, which can reduce the force borne by the fixed shaft B134, avoid breakage of the fixed shaft B134, and extend the service life of the fixed shaft B134. During the process of the processing cartridge transitioning from the initial state of separation from the drum to the state of contact with the drum, the torque generated by the meshing rotation of the force receiving wheel B133 and the first power receiving member B11 to drive the toner cartridge B10 to rotate needs to overcome the elastic force of the elastic member B31 to make the toner cartridge B10 rotate. This torque is loaded on the fixed shaft B134, and the fixed shaft B134 bearing the torque of B134 is prone to damage. Therefore, adding a frictional force generated by the pushed part elastic member B132 between the force receiving wheel B133 and the bracket B15 as an additional force to drive the toner cartridge B10 to rotate can reduce the force borne by the fixed shaft B134, reduce the possibility of damage to the fixed shaft B134, and extend the service life.

[0071] Optionally, the force receiving wheel B133 in this embodiment can be replaced by the force receiving wheel and the damping bearing in Embodiment 1, and its structure and working principle are the same as those in Embodiment 1; on the other hand, based on Embodiment 1, setting the pushed part elastic member B132 and the reed B131 in this embodiment can also achieve the technical effects of the present invention and reduce the force acting on the fixed shaft.

[0072] When the electro-imaging device stops working, the elastic member B31 (such as a coil spring and / or a compression spring) that drives the toner cartridge B10 away from the waste toner cartridge B20 separates the drum. In some cases, the first power receiving member B11 needs to rotate in reverse to complete the separation process.

[0073] Optionally, on the basis of setting this embodiment, the elastic member A31 described in Embodiment 1 can be set as long as the torque applied by the first power receiving member on the pushed part is large enough.

[0074] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0075] The above embodiments are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. There are many variations according to the shape, structure and principle of the present invention. Therefore, any variations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A processing cartridge detachably installed in an electrophotographic apparatus, the processing cartridge comprising: A developing roller and a toner cartridge supporting the developing roller; A photosensitive drum and a waste toner container supporting the photosensitive drum, the toner cartridge being rotatably connected to the waste toner container relative to the waste toner container; Characterized in that it further comprises a pushed part and a first power receiving member, the first power receiving member being capable of receiving a driving force from the electrophotographic apparatus, the driving force driving the pushed part, and the pushed part receiving the driving force of the first power receiving member to move the developing roller from a position separated from the photosensitive drum to a position in contact with the photosensitive drum, It further comprises an elastic member, when the first power receiving member does not receive a rotational driving force from the electrophotographic apparatus, the elastic member separates the developing roller from the photosensitive drum.

2. The processing cartridge according to claim 1, wherein The pushed part is provided at one end of the toner cartridge; when the pushed part receives a driving force from the first power receiving member, the pushed part drives the toner cartridge to rotate relative to the waste toner container so that the developing roller moves from a position separated from the photosensitive drum to a position in contact with the photosensitive drum.

3. The processing cartridge according to claim 1, wherein The pushed part and the first power receiving member are provided at the same end in the length direction of the toner cartridge.

4. The processing cartridge according to claim 1, wherein It further comprises a bracket for supporting the pushed part, the bracket being provided at one end in the length direction of the toner cartridge and fixedly connected to the toner cartridge; after the pushed part receives a rotational driving force from the first power receiving member, the pushed part drives the toner cartridge to rotate through the bracket so that the developing roller moves from a position separated from the photosensitive drum to a position in contact with the photosensitive drum.

5. The processing cartridge according to any one of claims 1-3, characterized in that, The pushed part comprises a force-receiving wheel and a damping bearing, the damping bearing is connected to the toner cartridge, the force-receiving wheel is rotatably sleeved on the damping bearing, and when the force-receiving wheel rotates by receiving the driving force of the first power receiving member, the resistance generated between the damping bearing and the force-receiving wheel drives the toner cartridge to rotate.

6. The processing cartridge according to claim 4, wherein The pushed part comprises a force-receiving wheel and a damping bearing, the damping bearing is connected to the toner cartridge, the force-receiving wheel is rotatably sleeved on the damping bearing, and when the force-receiving wheel rotates by receiving the driving force of the first power receiving member, the resistance generated between the damping bearing and the force-receiving wheel drives the toner cartridge to rotate.

7. The processing cartridge according to claim 6, characterized in that, The pushed part further comprises a fixed shaft fixedly connected to the bracket, the damping bearing is sleeved on the fixed shaft, and the resistance received by the force-receiving wheel when rotating in a preset direction is greater than the resistance when rotating in the opposite direction of the preset direction.

8. The processing cartridge according to claim 6, wherein The outer circumferential surface of the force-receiving wheel acting on the first power receiving member is a gear structure or a friction surface.

9. The processing cartridge according to claim 6, wherein The pushed part further comprises an adjusting member, the adjusting member is inserted into the damping bearing to adjust the interference degree between the damping bearing and the force-receiving wheel.

10. The processing cartridge according to any one of claims 7-9, characterized in that, The pushed part comprises a pushed part elastic member and a reed for pushing the force-receiving wheel into contact with the bracket, and the pushed part elastic member is restricted between the reed and the force-receiving wheel.

11. The processing cartridge according to claim 1, wherein The elastic member is a compression spring or a tension spring, and the elastic member is disposed between the powder bin and the waste powder bin. One end of the elastic member is connected to the powder bin, and the other end is connected to the waste powder bin; or, the elastic member is a coil spring or a torsion spring, one end of the elastic member is connected to an end cover fixedly connected to the waste powder bin, and the other end is connected to the powder bin.

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