Process cartridge

Abstract

The application provides a processing box, which comprises a drum frame, a photosensitive drum, a developing frame, a developing roller, an elastic pushing piece, a separation driving piece and an elastic reset piece. The developing roller and the photosensitive drum are located at a first side of the processing box. The elastic pushing piece is connected between the drum frame and the developing frame and is located at a second side of the processing box opposite to the first side. The elastic pushing piece forces the outer peripheral wall of the developing roller to abut against the outer peripheral wall of the photosensitive drum. The separation driving piece is arranged at one end of the processing box. The separation driving piece comprises a force receiving part and an abutting piece. The abutting piece is mounted on the developing frame and is provided with an abutting part. The force receiving part is exposed to the processing box and is arranged close to a photosensitive drum driving head. After the force receiving part is subjected to a force parallel to the extension direction of the photosensitive drum, the abutting piece is driven to move to a pushing position. The restoring force of the elastic reset piece forces the force receiving part and the abutting piece to reset. The processing box can avoid the abutting piece from interfering with the structure in the imaging device and causing damage to the related structure.

Description

Technical Field

[0001] This invention relates to the field of consumables for electronic imaging devices, and more specifically, to a processing cartridge. Background Technology

[0002] Imaging devices typically use a removable processing cartridge to supply toner, developing the electrostatic latent image on the photosensitive element, which is then transferred to a medium such as paper to form a visible image. The processing cartridge consists of a photosensitive drum unit and a developing unit. The photosensitive drum unit includes a drum frame and a photosensitive drum, which is rotatably supported on the drum frame. The developing unit includes a developing roller and a developing frame, which is rotatably supported on the developing frame.

[0003] During imaging, the developing roller in the processing cartridge is kept pressing against the photosensitive drum, and the developing roller remains in contact with the outer peripheral surface of the photosensitive drum. If a developing roller with an elastic layer is used, and the elastic layer of the developing roller remains in contact with the outer peripheral surface of the photosensitive drum for an extended period without supervision, the elastic layer of the developing roller may permanently deform. This can lead to uneven development of the latent image on the photosensitive drum, thus affecting the printing quality. Furthermore, when the developing roller is not used for development, the photosensitive drum and developing roller rotate in contact with each other. In this case, the photosensitive drum, developing roller, and developer may prematurely degrade due to friction between the photosensitive drum and the developing roller.

[0004] To address the aforementioned issues, existing imaging devices incorporate a pushing mechanism that acts on each processing cartridge. When no image is being formed, this mechanism pushes an abutment on the developing frame, separating the photosensitive drum and developing roller from each other. Typically, the processing cartridge is installed in a drawer within the main assembly of the imaging device. When the drawer is pushed into the main assembly, the processing cartridge is precisely positioned for imaging. When the drawer is pushed into or pulled out of the main assembly to install or remove the processing cartridge, the developing roller separates from the photosensitive drum. The pushing mechanism remains retracted from the installation / removal path of the processing cartridge to prevent interference. The abutment is a fixed component, positioned near the end of the cartridge. Because this fixed abutment protrudes outward from the bottom wall of the processing cartridge, it can easily press against the locking protrusions on both sides of the drawer in the main assembly during installation, potentially damaging the corresponding components of the imaging device or processing cartridge. Summary of the Invention

[0005] The purpose of this invention is to provide a processing box that can avoid interference between the contacting component and the structure in the imaging device, thus preventing damage to the related structure.

[0006] To achieve the above objectives, the present invention provides a processing cartridge, comprising a drum frame; a photosensitive drum rotatably mounted on the drum frame, with a photosensitive drum drive head at one end of the photosensitive drum; a developing frame connected to the drum frame and rotatable relative to the drum frame; a developing roller rotatably mounted on the developing frame, with both the developing roller and the photosensitive drum located on a first side of the processing cartridge; an elastic pusher connected between the drum frame and the developing frame and located on a second side of the processing cartridge opposite to the first side, the elastic pusher forcing the outer peripheral wall of the developing roller to abut against the outer peripheral wall of the photosensitive drum; a separation drive member disposed at one end of the processing cartridge, the separation drive member comprising a force receiving portion and an abutting portion, the abutting portion being mounted on the developing frame, the abutting portion having an abutting portion, the force receiving portion being exposed outside the processing cartridge and disposed near the photosensitive drum drive head, the force receiving portion being driven to move to the pusher position after being subjected to a force parallel to the extension direction of the photosensitive drum; and an elastic reset member, the restoring force of the elastic reset member forcing the force receiving portion and the abutting portion to reset.

[0007] As can be seen from the above scheme, before the processing cartridge is inserted into the imaging device, the restoring force of the elastic reset member forces the force receiving part and the abutment part to reset, and keeps the abutment part in the retracted position or the avoidance position. In this way, when the processing cartridge is inserted into the imaging device, interference between the abutment part and the locking protrusion on the imaging device can be avoided, which would cause damage to the related structures. After the processing cartridge is inserted into the imaging device, the first transmission head used to drive the photosensitive drum drive head to rotate extends outward after the imaging device is working. During the process of the first transmission head engaging with the photosensitive drum drive head, it will abut against the force receiving part, thereby driving the abutment part to extend from the first side of the processing cartridge to or move to the abutment position. The abutment part in the abutment position is used to cooperate with the pushing mechanism in the imaging device.

[0008] In a preferred embodiment, the processing cartridge further includes an end cap, which is located at one end of the processing cartridge near the photosensitive drum drive head, with the separation drive component and the elastic reset component both located between the end cap and the developing frame; the end cap is integrally formed with the drum frame; or the end cap is fixedly connected to the drum frame.

[0009] As can be seen from the above, by placing both the separation drive component and the elastic reset component on the end cover, the internal space of the end cover can be made reasonable use.

[0010] A further embodiment includes a pressing member located between the abutment and the end cap. The pressing member can move relative to the end cap in a direction parallel to the photosensitive drum. A force receiving part is located on the pressing member. A guide slope is provided on the side wall of the pressing member facing the abutment, and the guide slope is inclined towards the first side of the processing cartridge. The abutment is hinged to the developing frame. The abutment also includes a force receiving part adjacent to and slidingly engaged with the guide slope. The force receiving part can slide along the extension direction of the guide slope and drive the abutment to rotate from a hidden position to a forced position.

[0011] As can be seen, when the force receiving part is subjected to an external force, the pressing part moves in a direction parallel to the photosensitive drum, and the guide slope applies a force to the force receiving part of the abutment, forcing the force receiving part to slide along the guide slope, thereby driving the abutment to rotate around the hinge position. The abutment rotates from the hidden position to the pushing position to receive the force applied by the pushing mechanism of the imaging device, so that the developing roller and the photosensitive drum are separated.

[0012] A further embodiment includes a connecting arm, an abutting arm, and a force-bearing arm; the fixed ends of the abutting arm and the force-bearing arm are respectively connected to the two ends of the connecting arm, the force-bearing part is located at the free end of the force-bearing arm, and the abutting part is located at the free end of the abutting arm; the extension direction of the abutting arm is set at an acute angle to the extension direction of the force-bearing arm, and the abutting part is closer to the first side of the processing box than the force-bearing part; the abutting arm is also provided with a hinge part, and the abutting member is hinged to the developing frame through the hinge part; the elastic reset member abuts against the side wall of the force-bearing arm opposite to the force-bearing part.

[0013] As can be seen, the abutment is roughly U-shaped, which can ensure stable rotation while saving materials. At the same time, the extension direction of the abutment arm is set at an acute angle to the extension direction of the force arm. The abutment part is closer to the first side of the processing box than the force-bearing part, which can ensure that the abutment part can be rotated to the pushing position more easily.

[0014] A further embodiment is that a stop is provided on the first side wall of the force arm facing the extruder, and the stop extends from the first side wall of the force arm in a direction away from the abutting arm; a support protrusion is provided on the side wall of the extruder facing the abutting member, a guide slope is located on the support protrusion, the stop and the connecting arm are respectively located on opposite sides of the support protrusion, and the stop and the support protrusion form a limiting fit in the extension direction of the force arm.

[0015] It can be seen that the limiting fit between the stop and the support protrusion can prevent the force-bearing part from separating from the guide slope when it slides along the guide slope, thereby ensuring the stability of the connection between the components of the separation drive.

[0016] In a preferred embodiment, the extruder includes a columnar portion and a support plate, the support plate being connected to the axial end of the columnar portion, the axis of the columnar portion being parallel to the axis of the photosensitive drum, a force receiving portion being located at the free end of the columnar portion away from the support plate, and a guide ramp being located on the side wall of the support plate opposite to the columnar portion.

[0017] This ensures that when the force receiving part is subjected to external force, the pressing part can move along the axis of the photosensitive drum, thereby applying a force to the abutting part to force it to rotate to the pushing position.

[0018] A preferred embodiment is that a limiting part is also provided on the side wall of the support plate opposite to the columnar part. The limiting part is connected to one end of the guide slope extending in the direction of the guide slope and is set at an angle to the guide slope. The elastic force of the elastic reset member forces the abutting member to abut against the limiting part so that the abutting part is in a hidden position.

[0019] Therefore, the elastic reset component allows the abutment to abut against the limiting part, keeping the abutment in a concealed position. This ensures that the abutment will not interfere with the locking protrusions on both sides of the drawer inside the imaging device when handling the box-packing machine. Simultaneously, the limiting part also provides support to the force-bearing part before sliding to the guide ramp.

[0020] A preferred embodiment is to have a limiting groove on the end cap, and to install the extruder in the limiting groove, which restricts the extruder to move only in a direction parallel to the photosensitive drum.

[0021] It can be seen that the limiting groove and the extrusion part are matched to prevent the extrusion part from rotating during the movement, so that the force-bearing part will separate from the guide slope.

[0022] A preferred embodiment includes an abutment block and a pressing post, the pressing post extending in a direction parallel to the photosensitive drum, an mounting hole on the abutment block, a support post on the developing frame, the support post slidingly engaging with the mounting hole; a force receiving part located at the free end of the pressing post, and an abutment part located on the abutment block; an elastic reset member forces the abutment block away from the developing frame in a direction parallel to the photosensitive drum.

[0023] Therefore, when the force receiving part is not subjected to external force, the elastic reset member forces the abutment block away from the developing frame along a direction parallel to the photosensitive drum, so as to translate it to a position where it does not interfere with the locking protrusions on both sides of the drawer inside the imaging device. After processing the cassette, during the extension of the first drive head of the imaging device, the first drive head applies a force to the force receiving part, and the squeezing column drives the abutment block to move along a direction parallel to the photosensitive drum, while the abutment block moves along the support column to the pushing position.

[0024] In a preferred embodiment, the photosensitive drum drive head is used to engage with the first drive head in the imaging device to receive the driving force transmitted by the first drive head; the force receiving part is capable of abutting against the first drive head in a direction parallel to the photosensitive drum.

[0025] Therefore, it can be seen that by applying force to the force receiving part through the first transmission head, there is no need to set up an additional drive mechanism, and the overall structure is simple and easy to implement. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the driver end of the first embodiment of the processing box of the present invention.

[0027] Figure 2This is an assembly diagram of the drum frame and the separation drive component in the first embodiment of the processing box of the present invention.

[0028] Figure 3 This is an exploded view of the drum frame and the separation drive component in the first embodiment of the processing box of the present invention.

[0029] Figure 4 This is an exploded view of the structure of the first transmission head, torsion spring, and separation drive component in the first embodiment of the processing box of the present invention.

[0030] Figure 5 This is an exploded view of the torsion spring and the separation drive component in the first embodiment of the processing box of the present invention.

[0031] Figure 6 These are a diagram and a partial enlarged view showing the state of the contact portion in the retracted position in the first embodiment of the processing box of the present invention.

[0032] Figure 7 This is a left view of the first transmission head, torsion spring, and separation drive member in the first embodiment of the processing box of the present invention, with the abutment portion in the retracted position.

[0033] Figure 8 This is a front view of the first transmission head, torsion spring, and separation drive member in the retracted position at the contact portion in the first embodiment of the processing box of the present invention.

[0034] Figure 9 These are a diagram and a partial enlarged view showing the state of the contact portion in the pushing position in the first embodiment of the processing box of the present invention.

[0035] Figure 10 This is a left view of the first transmission head, torsion spring, and separation drive member in the first embodiment of the processing box of the present invention, with the abutment portion in a forced pushing position.

[0036] Figure 11 This is a front view of the first transmission head, torsion spring, and separation drive member in the first embodiment of the processing box of the present invention, with the abutment portion in a forced pushing position.

[0037] Figure 12 This is a structural diagram of the driver end of the second embodiment of the processing box of the present invention.

[0038] Figure 13 This is a partial view of the second embodiment of the processing box of the present invention, with the abutment portion in a forced-pushing position.

[0039] Figure 14 This is an exploded view of the structure of the separation drive component and the elastic reset component in the second embodiment of the processing box of the present invention.

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0041] Processing box first embodiment:

[0042] See Figure 1 and Figure 2 The processing box includes a drum frame 11, a photosensitive drum 12, a developing frame 13, a developing roller (not shown), a separation drive 2, an elastic pusher, and an elastic resetter. Preferably, the elastic pusher is a spring. The elastic resetter is a torsion spring 16.

[0043] The photosensitive drum 12 is rotatably mounted on the drum frame 11. A photosensitive drum drive head 121 is provided at the axial end of the photosensitive drum 12. The photosensitive drum drive head 121 is used to engage with the first transmission head 100 in the imaging device to receive the driving force transmitted by the first transmission head 100. The developing frame 13 is connected to the drum frame 11 and can rotate relative to the drum frame 11. The developing roller is rotatably mounted on the developing frame 13. A developing roller drive head 130 is provided at the axial end of the developing roller. The developing roller drive head 130 is used to engage with the second transmission head in the imaging device to receive the driving force transmitted by the second transmission head. The developing roller and the photosensitive drum 12 are both located on the first side 101 of the processing cartridge and are arranged in parallel. An elastic pusher is connected between the drum frame 11 and the developing frame 13 and is located on the second side 102 of the processing cartridge opposite to the first side 101. During the imaging process, the elastic pusher forces the outer peripheral wall of the developing roller to abut against the outer peripheral wall of the photosensitive drum 12. The processing cartridge also includes an end cap 17, which is disposed at one end of the processing cartridge near the photosensitive drum drive head and integrally formed with the drum frame 11. The separation drive member 2 and the torsion spring 16 are both installed between the end cap 17 and the developing frame 13. The photosensitive drum drive head 121 and the developing roller drive head 130 both protrude from the end cap 17. In other embodiments, the end cap 17 may also be fixedly connected to the drum frame 11.

[0044] See Figures 2 to 5 The separation drive unit 2 includes an abutment 3 and a squeezing member 4. The abutment 3 is mounted on the developing frame 13, and the squeezing member 4 is mounted on the end cap 17 and located between the abutment 3 and the end cap 17.

[0045] The abutment 3 includes a connecting arm 31, an abutment arm 32, and a force-receiving arm 33. The fixed ends of the abutment arm 32 and the force-receiving arm 33 are respectively connected to the two ends of the connecting arm 31. The connecting arm 31 extends in a direction parallel to the photosensitive drum 12. The free end of the force-receiving arm 33 is provided with a force-receiving part 331, and the free end of the abutment arm 32 is provided with an abutment part 321. The abutment part 321 is used to receive the pushing force of the pushing mechanism in the imaging device, thereby causing the developing roller to move away from the photosensitive drum 12. The extending direction of the abutment arm 32 is set at an acute angle to the extending direction of the force-receiving arm 33. The abutment part 321 is closer to the first side 101 of the processing cartridge than the force-receiving part 331. A hinge part 322 is provided in the middle of the abutment arm 32. The hinge part 322 is a through hole that passes through the abutment arm 32 along the axial direction parallel to the photosensitive drum 12. A support shaft 131 is provided on the side wall of the developing frame 13. Figure 1(As shown), the support shaft 131 passes through the hinge part 322 to realize the rotational connection between the abutment 3 and the developing frame 13. The first torsion arm 161 of the torsion spring 16 abuts against the inner wall of the end cover 17, and the second torsion arm 162 of the torsion spring 16 abuts against the side wall of the force arm 33 opposite to the force receiving part 331.

[0046] like Figure 3 As shown, a limiting groove 171 is formed on the end cap 17, and the extruder 4 is installed in the limiting groove 171. The limiting groove 171 restricts the extruder 4 to move only in a direction parallel to the photosensitive drum 12. The extruder 4 includes a columnar portion 41, a support plate 42, and a support protrusion 43. The support plate 42 is connected to the axial end of the columnar portion 41. The axis of the columnar portion 41 is parallel to the axis of the photosensitive drum 12. The free end of the columnar portion 41 passes through the end cap 17 in a direction parallel to the axis of the photosensitive drum 12. A force receiving portion 411 is provided at the free end of the columnar portion 41 away from the support plate 42. The force receiving portion 411 is exposed in the processing box and is located near the photosensitive drum drive head 121. The force receiving portion 411 can abut against the first drive head 100 in a direction parallel to the photosensitive drum 12. After the force receiving portion 411 is subjected to the force applied by the first drive head 100 in a direction parallel to the photosensitive drum 12, it can drive the abutment portion 321 to move to the pushing position (e.g., Figure 9 (as shown in the diagram). In other embodiments, the force receiving unit 411 may also receive a force applied by the second drive head that is parallel to the photosensitive drum 12.

[0047] The sidewall 420 of the support plate 42, opposite to the columnar portion 41, is positioned towards the abutment 3. A support protrusion 43 is provided on this sidewall 420 of the support plate 42. The support protrusion 43 is provided with a guide slope 431 and a limiting portion 432 that are interconnected. The guide slope 431 is inclined towards the first side 101 of the processing box. The force-bearing portion 331 is adjacent to and slides with the guide slope 431. The force-bearing portion 331 can slide along the extending direction of the guide slope 431 and drive the abutment portion 321 from a hidden position (e.g., Figure 6 Rotate to the forced push position (as shown in the image).

[0048] The limiting part 432 is connected to one end of the guide slope 431 in the extending direction and is set at an obtuse angle to the guide slope 431. The elastic force of the torsion spring 16 forces the abutting member 3 to abut against the limiting part 432 so that the abutting part 321 is in the hidden position.

[0049] A stop 332 is provided on the first side wall 330 of the force arm 33 facing the extruder 4. The stop 332 extends from the first side wall 330 of the force arm 33 in a direction away from the abutting arm 32. The stop 332 and the connecting arm 31 are located on opposite sides of the supporting protrusion 43, and the stop 332 and the supporting protrusion 43 form a limiting fit in the extending direction of the force arm 33.

[0050] See Figure 1 as well as Figures 6 to 11 Before the processing box is inserted into the imaging device, the force receiving part 411 is not subjected to the force of the first transmission head 100. The elastic force of the torsion spring 16 forces the force receiving part 331 of the abutment 3 to abut against the limiting part 432 of the extrusion part 4, thereby driving the abutment part 321 to be in a hidden position. In this way, when the processing box is inserted into the imaging device, interference between the abutment part 321 and the locking protrusion on the imaging device can be avoided, thus preventing damage to the related structures. After the cassette is loaded into the imaging device, the imaging device starts working and the first drive head 100 extends and engages with the photosensitive drum drive head 121. The end wall of the first drive head 100 abuts against the force receiving part 411 in a direction parallel to the photosensitive drum 12. As the first drive head 100 continues to move, it continues to apply force to the force receiving part 411. The force receiving part 411 drives the pressing member 4 to move in a direction parallel to the photosensitive drum 12. Under the action of the guide slope 431, the force-receiving part 331 of the abutment member 3 moves away from the limiting part 432 along the guide slope 431. Thus, the abutment member 3 rotates around the support shaft 131 of the developing frame 13, and the abutment part 321 moves from... Figure 6 The hidden position shown extends to Figure 9 The device is positioned in the push-pull position and held in that position. Thus, the abutment portion 321 in the push-pull position can cooperate with the push-pull mechanism in the imaging device.

[0051] When no image is formed, the pushing mechanism in the imaging device pushes the abutment part 321 and drives the developing roller to move away from the photosensitive drum 12, thereby causing the developing frame 13 to rotate around the position where it is hinged to the drum frame 11, thereby separating the developing roller from the photosensitive drum 12.

[0052] Second embodiment of the processing box:

[0053] As an explanation of the second embodiment of the processing box of the present invention, the following description only focuses on the differences from the first embodiment of the processing box described above.

[0054] See Figures 12 to 14 In this embodiment, the separation drive component 20 includes only the abutment component 21, and the abutment component 21 includes an abutment block 22 and a pressing column 23. The pressing column 23 extends in a direction parallel to the photosensitive drum 212. The abutment block 22 has a mounting hole 221, and the developing frame 213 is provided with a support column 2131, which slides in conjunction with the mounting hole 221. The force receiving part 2411 is located at the free end of the pressing column 23, and the abutment part 2321 is located on the abutment block 22.

[0055] The elastic reset element is a spring 216. The two ends of the spring 216 abut against the developing frame 213 and the abutment block 22, respectively. The restoring force of the spring 216 forces the abutment block 22 away from the developing frame 213 in a direction parallel to the photosensitive drum 212. A mounting groove 222 is provided on the side wall of the abutment block 22, and a mounting post 223 is provided in the mounting groove 222. The spring 216 is installed in the mounting groove 22 and sleeved on the mounting post 223.

[0056] Before the cassette is inserted into the imaging device, the force receiving part 2411 is not subjected to the force of the first drive head 200. The elastic force of the spring 216 forces the abutment block 22 away from the developing frame 213 in a direction parallel to the photosensitive drum 212, thereby moving the abutment part 2321 to a clearance position. This prevents interference between the abutment part 2321 and the locking protrusion on the imaging device, thus avoiding damage to related structures. After the cassette is inserted into the imaging device, the imaging device starts operating, and the first drive head 200 extends and engages with the photosensitive drum drive head 2121. The end wall of the first drive head 200 abuts against the force receiving part 2411 in a direction parallel to the photosensitive drum 212. As the first drive head 200 continues to move, it continues to apply force to the force receiving part 2411. The force receiving part 2411 drives the abutment 21 to move in a direction parallel to the photosensitive drum 212, and the abutment part 2321 moves from the clearance position to the pushing position. Figure 13 (as shown in the figure) and remain in the pushing position. Thus, the abutment portion 2321 in the pushing position can cooperate with the pushing mechanism in the imaging device.

[0057] As can be seen from the above, before the processing cartridge is inserted into the imaging device, the restoring force of the elastic reset member forces the force receiving part and the abutment part to reset, and keeps the abutment part in the retracted or avoidance position. In this way, when the processing cartridge is inserted into the imaging device, interference between the abutment part and the locking protrusion on the imaging device can be avoided, which would cause damage to the related structures. After the processing cartridge is inserted into the imaging device, the first transmission head used to drive the photosensitive drum drive head to rotate extends outward after the imaging device is working. During the engagement of the first transmission head with the photosensitive drum drive head, it will abut against the force receiving part, thereby driving the abutment part to extend from the first side of the processing cartridge to or move to the abutment position. The abutment part in the abutment position is used to cooperate with the pushing mechanism in the imaging device.

[0058] Finally, it should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A process cartridge, comprising: a drum frame; a photosensitive drum rotatably mounted on the drum frame, the photosensitive drum being provided with a photosensitive drum driving head at one end thereof; a developing frame connected with the drum frame and rotatable relative to the drum frame; a developing roller rotatably mounted on the developing frame, the developing roller and the photosensitive drum being located at a first side of the process cartridge; a resilient urging member connected between the drum frame and the developing frame and located at a second side of the process cartridge opposite to the first side, the resilient urging member urging an outer peripheral wall of the developing roller to abut against an outer peripheral wall of the photosensitive drum; characterized in that: a separation driving member is provided at one end of the process cartridge, the separation driving member comprising a force receiving portion and an abutting member, the abutting member being mounted on the developing frame, the abutting member being provided with an abutting portion, the force receiving portion being exposed to the process cartridge and being provided close to the photosensitive drum driving head, the force receiving portion being driven to move to an urging position after being subjected to a force parallel to an extending direction of the photosensitive drum; a resilient restoring member, a restoring force of the resilient restoring member urging the force receiving portion and the abutting member to restore; the photosensitive drum driving head being configured to engage with a first driving head in an image forming apparatus to receive a driving force transmitted by the first driving head; the force receiving portion being capable of abutting against the first driving head along a direction parallel to the photosensitive drum. 2.The process cartridge according to claim 1, characterized in that: the process cartridge further comprises an end cover provided at one end of the process cartridge close to the photosensitive drum driving head, the separation driving member and the resilient restoring member being located between the end cover and the developing frame; the end cover is integrally formed with the drum frame; or the end cover is fixedly connected with the drum frame. 3.The process cartridge according to claim 2, characterized in that: the separation driving member further comprises a pressing member located between the abutting member and the end cover, the pressing member being movable relative to the end cover along a direction parallel to the photosensitive drum, the force receiving portion being located on the pressing member, a guide inclined surface being provided on a side wall of the pressing member facing the abutting member, the guide inclined surface being inclined toward the first side of the process cartridge; the abutting member is hinged with the developing frame, the abutting member further comprising a force receiving portion, the force receiving portion being adjacent to and slidingly fitted with the guide inclined surface; the force receiving portion is capable of sliding along an extending direction of the guide inclined surface and driving the abutting member to rotate from a hidden position to the urging position. 4.The process cartridge according to claim 3, characterized in that: the abutting member comprises a connecting arm, an abutting arm and a force receiving arm; fixed ends of the abutting arm and the force receiving arm are connected at two ends of the connecting arm respectively, the force receiving portion is located at a free end of the force receiving arm, the abutting portion is located at a free end of the abutting arm; an extending direction of the abutting arm and an extending direction of the force receiving arm are arranged at an acute angle, the abutting portion is closer to the first side of the process cartridge relative to the force receiving portion. The abutting arm is also provided with a hinge portion, and the abutting member is hinged to the developing frame through the hinge portion; The elastic reset member abuts against the side wall of the force-bearing arm opposite to the force-bearing part.

5. The processing box according to claim 4, characterized in that: A stop is provided on the free end of the force-bearing arm facing the first side wall of the extruder, and the stop extends from the first side wall of the force-bearing arm in a direction away from the abutting arm. The extrusion member has a support protrusion on its side wall facing the abutment member. The guide slope is located on the support protrusion. The stop member and the connecting arm are located on opposite sides of the support protrusion. The stop member and the support protrusion form a limiting fit in the extension direction of the force-bearing arm.

6. The processing box according to any one of claims 3 to 5, characterized in that: The extrusion member includes a columnar portion and a support plate. The support plate is connected to the axial end of the columnar portion. The axis of the columnar portion is parallel to the axis of the photosensitive drum. The force receiving portion is located at the free end of the columnar portion away from the support plate. The guide slope is located on the side wall of the support plate opposite to the columnar portion.

7. The processing box according to claim 6, characterized in that: A limiting part is also provided on the side wall of the support plate opposite to the columnar part. The limiting part is connected to one end of the guide inclined surface in the extension direction and is set at an angle to the guide inclined surface. The elastic force of the elastic reset member forces the abutment to abut against the limiting part, so that the abutment is in the hidden position.

8. The processing box according to any one of claims 3 to 5, characterized in that: The end cap has a limiting groove, and the extruder is installed in the limiting groove. The limiting groove restricts the extruder to move only in a direction parallel to the photosensitive drum.

9. The processing box according to claim 1, characterized in that: The abutting member includes an abutting block and a squeezing column. The squeezing column extends in a direction parallel to the photosensitive drum. The abutting block has a mounting hole. The developing frame is provided with a support column. The support column is slidably engaged with the mounting hole. The force receiving part is located at the free end of the squeezing column. The abutting part is located on the abutting block. The elastic reset member forces the abutment block away from the developing frame along a direction parallel to the photosensitive drum.

Images