Developing cartridge

Abstract

The utility model discloses a developing box, which is detachably installed to a drum box and is loaded into an electrophotographic imaging device together with the drum box. The developing box comprises a first box body and a developing roller arranged in the first box body. The developing roller rotates around an axis extending in a longitudinal direction. The developing layer has a left end of a driving end, a right end of a non-driving end and a developer bearing area between the left end and the right end. The developing box further comprises a separation member located at the driving end and configured to receive a separation force applied by the device, and a range increasing member located at the non-driving end and configured to abut against an acting part outside the developing box. At least a part of the range increasing member is located outside the bearing area. An abutment point between the range increasing member and the acting part is farther away from a photosensitive drum surface than a contact point between the right end and the photosensitive drum in a direction perpendicular to the longitudinal direction. This structure makes the two ends of the developing roller synchronously move away from the photosensitive drum during the separation process, realizes complete separation and effectively prevents the developing layer from deforming or the photosensitive drum from being contaminated when left idle for a long time.

Description

[0001] Case Separation Statement

[0002] This divisional application is a divisional application of Chinese utility model patent application filed on October 19, 2024, with application number 202422536719.9 and entitled "Developer Box".

[0003] This utility model application includes: application date 2023.10.19, application number 202322821160.X, invention title "Developer Box"; application date 2023.11.04, application number 202323073548.2, invention title "Developer Box"; application date 2023.12.05, application number 202323314191.2, invention title "Developer Box"; and application date 2024.01.12. Priority is claimed in the following Chinese applications: application number 202420091801.2, entitled "Developer Box"; application date 2024.07.30; application number 202421823793.2, entitled "Developer Box"; and application date 2024.08.15, entitled "Developer Box". All contents of the aforementioned earlier applications are cross-referenced in this application. Technical Field

[0004] This utility model relates to the field of electrophotographic imaging, and more specifically to a developing cartridge for detachable installation in an electrophotographic imaging device. Background Technology

[0005] In electrophotographic imaging equipment, the developing cartridge is usually used in conjunction with the drum cartridge and can be installed or removed together with the drum cartridge. To avoid deformation of the developing layer or contamination of the drum cartridge due to prolonged contact between the developing roller and the photosensitive drum when not printing, the equipment often uses a separation mechanism to apply a separation force, causing the developing roller to rotate around a fulcrum, thereby detaching it from the photosensitive drum.

[0006] In existing technologies, the separation force typically acts only on the drive end of the developing cartridge (e.g., through a separation component), causing the developing cartridge to rotate around the drive end as a fulcrum. In this case, although the end of the developing roller at the drive end can effectively move away from the photosensitive drum, the non-drive end still remains in contact with the photosensitive drum or has a very small gap. Especially during long-term idle periods, this contact area is prone to crushing and deformation of the developing layer or toner transfer to the surface of the photosensitive drum, leading to image defects or even component damage.

[0007] Therefore, there is an urgent need for a developing cartridge structure that can simultaneously increase the separation gap between the driving end and the non-driving end when receiving separation force, ensuring that both ends of the developing roller are separated from the photosensitive drum, thereby fundamentally avoiding contact damage and contamination problems. Utility Model Content

[0008] This utility model provides a developing cartridge to solve any of the above-mentioned technical problems, enabling the developing roller and photosensitive drum to be effectively separated when the processing cartridge is not performing imaging work. The specific solution is as follows:

[0009] A developing cartridge, detachably mounted to a drum cartridge and installable together with the drum cartridge into an electrophotographic imaging device, the developing cartridge comprising a first housing, the drum cartridge comprising a second housing and a photosensitive drum rotatably disposed within the second housing, characterized in that the developing cartridge comprises: a developing roller rotatably disposed within the first housing, the developing roller rotating about a rotation axis parallel to the longitudinal direction, the developing roller comprising a developing layer, the developing layer comprising a left end located at a driving end and a right end located at a non-driving end, a carrying area for carrying developer formed between the left and right ends. The non-driving end and the driving end are arranged opposite each other in the longitudinal direction; a separation member is arranged at the driving end of the developing cartridge for receiving the separation force applied by the electrophotographic imaging device to separate the developing roller from the photosensitive drum; and a range extender is arranged at the non-driving end of the developing cartridge, the range extender being used to abut against the action part outside the developing cartridge to completely separate the developing roller from the photosensitive drum; wherein, at least a portion of the range extender is located outside the bearing area, in a direction perpendicular to the longitudinal direction, the point where the range extender abuts against the action part is further away from the surface of the photosensitive drum than the point where the right end contacts the photosensitive drum.

[0010] In some embodiments, the actuating part is disposed on the drum housing or in the imaging device.

[0011] In some embodiments, the photosensitive drum is configured as an active part.

[0012] In some embodiments, the drum box includes a first intermediate portion and a first upper extension and a first lower extension spaced apart in the vertical direction. The first intermediate portion connects the first upper extension and the first lower extension. In the front-back direction, the first upper extension and the first lower extension both extend rearward from the first intermediate portion. The developing roller is disposed in front of the developing box in the front-back direction. The first intermediate portion is configured as the working part. The front-back direction, the vertical direction and the longitudinal direction are perpendicular to each other.

[0013] In some embodiments, the developing cartridge has a right positioning portion at the non-driving end, which abuts against the first upper extension portion.

[0014] In some embodiments, when the separating member receives the separating force and the developing roller rotates about the point where the extender abuts against the actuating part, in the separated state, the angle formed between the rotation axis of the developing roller and the rotation axis of the photosensitive drum is greater than the angle formed between the rotation axis of the developing roller and the rotation axis of the photosensitive drum in the separated state when the developing roller rotates at the contact point where its right end contacts the photosensitive drum.

[0015] In some embodiments, the range extender is disposed on the first housing.

[0016] In some embodiments, the developing cartridge includes a support disposed at the non-drive end, the support rotatably supporting the developing roller, and the range extender is disposed on the support.

[0017] In some embodiments, the separating member is provided with a force receiving surface that is not parallel to the longitudinal direction, and the force receiving surface is configured as an inclined surface or a spiral surface.

[0018] In some embodiments, in the longitudinal direction, the point where the range extender abuts against the actuating part is further away from the drive end than the point where the right end contacts the photosensitive drum.

[0019] The beneficial effects of this utility model are as follows: by setting the extension component, the left and right ends of the developing layer are separated from the photosensitive drum. Even if the developing cartridge is not used for a long time, the developing layer will not come into contact with the photosensitive drum, and neither the developing roller nor the photosensitive drum will be damaged or contaminated. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a processing box having the developing box according to Embodiment 1 of this utility model.

[0021] Figure 2 This is a side view of the processing box having the developing box according to Embodiment 1 of this utility model.

[0022] Figure 3 This is a side view of the processing box having the developing box according to Embodiment 1 of this utility model.

[0023] Figure 4 This is a cross-sectional schematic diagram of the processing box according to Embodiment 1 of this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the drum box involved in Embodiment 1 of this utility model.

[0025] Figure 6 This is an exploded schematic diagram of the separation component of the developing cartridge after it is separated from the first cartridge body according to Embodiment 1 of this utility model.

[0026] Figure 7 This is a schematic diagram of the structure of a processing box having the developing box according to Embodiment 2 of this utility model.

[0027] Figure 8 This is a side view of the processing box having the developing box according to Embodiment 2 of this utility model.

[0028] Figure 9This is a cross-sectional structural diagram of the processing box having the developing box according to Embodiment 2 of this utility model.

[0029] Figure 10 This is a schematic diagram of the connecting rod in the developing cartridge according to Embodiment 2 of this utility model.

[0030] Figure 11 This is a diagram showing the state of the developing cartridge and drum cartridge after separation, according to Embodiment 3 of this utility model.

[0031] Figure 12A This is a perspective view of the developing cartridge involved in Embodiment 3 of this utility model.

[0032] Figure 12B This is a perspective view of the driving force transmission component in the developing cartridge according to Embodiment 3 of this utility model.

[0033] Figure 13 This is a side view of the developing cartridge involved in Embodiment 3 of this utility model, viewed along the longitudinal direction.

[0034] Figure 14 This is a side view of the processing box having the developing box according to Embodiment 3 of this utility model, viewed along the longitudinal direction.

[0035] Figure 15 This is a perspective view of the developing cartridge involved in Embodiment 4 of this utility model.

[0036] Figure 16 This is a side view of the developing roller and photosensitive drum in the developing cartridge according to Embodiment 4 of this utility model when they are separated.

[0037] Figure 17 This is an exploded schematic diagram of the separation component of the developing cartridge after it is separated from the first cartridge body according to Embodiment 4 of this utility model.

[0038] Figure 18 This is a schematic diagram of the state of the second longitudinal end of the developing cartridge when the developing roller and the photosensitive drum are separated in the developing cartridge according to Embodiment 4 of this utility model.

[0039] Figure 19 This is a perspective view of the first longitudinal end of the developing cartridge according to Embodiment 5 of this utility model.

[0040] Figure 20 This is a schematic diagram of the state of the first longitudinal end of the developing cartridge when the developing roller and the photosensitive drum are separated in the developing cartridge according to Embodiment 5 of this utility model.

[0041] Figure 21 This is a schematic diagram of the state of the second longitudinal end of the developing cartridge when the developing roller and the photosensitive drum are separated in the developing cartridge according to Embodiment 5 of this utility model.

[0042] Figure 22A and Figure 22B This is a perspective view of the drum box involved in this utility model.

[0043] Figure 23 This is a perspective view of the end of the developing cartridge where the second force-applying part is located, according to Embodiment 6 of this utility model.

[0044] Figure 24 This is a perspective view of the developing cartridge in its first state when it is installed into the drum cartridge according to Embodiment 6 of this utility model.

[0045] Figure 25 This is a perspective view of the developing cartridge in its second state when it is installed into the drum cartridge according to Embodiment 6 of this utility model.

[0046] Figure 26 This is a perspective view of the developing roller and photosensitive drum in the developing cartridge according to Embodiment 7 of this utility model when they are separated from each other.

[0047] Figure 27A This is a perspective view of the end where the second force-applying part is located when the developing roller and the photosensitive drum in the developing cartridge of Embodiment 8 of this utility model are in a state of close proximity.

[0048] Figure 27B This is a perspective view of the end where the second force-applying part is located when the developing roller and the photosensitive drum in the developing cartridge according to Embodiment 8 of this utility model are in a state of separation from each other.

[0049] Figure 28 This is a perspective view of the developing cartridge involved in Embodiment 9 of this utility model.

[0050] Figure 29A This is a perspective view of the end where the second force-applying part is located when the developing roller and the photosensitive drum in the developing cartridge are in a close-to-each-other state, according to Embodiment 9 of this utility model.

[0051] Figure 29B This is a perspective view of the end where the second force-applying part is located when the developing roller and the photosensitive drum in the developing cartridge according to Embodiment 9 of this utility model are in a state of separation.

[0052] Figure 30 This is a perspective view of the developing cartridge involved in Embodiment 10 of this utility model.

[0053] Figure 31 This is a partial perspective view of the developing cartridge according to Embodiment 10 of this utility model, showing the developing roller and the photosensitive drum approaching each other after the developing cartridge is installed into the drum cartridge.

[0054] Figure 32A This is a plan view of the developing cartridge according to Embodiment 10 of this utility model, when the developing roller and the photosensitive drum are close to each other after the developing cartridge is installed into the drum cartridge.

[0055] Figure 32BThis is a plan view of the developing cartridge according to Embodiment 10 of this utility model, after it has been installed into the drum cartridge, with the developing roller and the photosensitive drum separated from each other.

[0056] Figure 33 This is a simplified diagram showing the change in the angle between the rotation axis of the developing roller and the rotation axis of the photosensitive drum when the developing roller and the photosensitive drum are separated in the developing cartridge according to Embodiment 10 of this utility model.

[0057] Figure 34 This is a partial perspective view of the developing cartridge according to Embodiment 11 of this utility model, after it has been installed into the drum cartridge, showing the developing roller and the photosensitive drum separated from each other.

[0058] Figure 35 This is a perspective view of the developing cartridge according to Embodiment 12 of this utility model, after it has been installed into the drum cartridge, with the developing roller and the photosensitive drum separated from each other.

[0059] Figure 36 This is a perspective view of the developing cartridge involved in Embodiment 13 of this utility model.

[0060] Figure 37 This is a side view of the developing cartridge involved in Embodiment 13 of this utility model, viewed along the longitudinal direction.

[0061] Figure 38A This is a side view taken along the longitudinal direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are close to each other, according to Embodiment 13 of this utility model.

[0062] Figure 38B This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are separated from each other, according to Embodiment 13 of this utility model.

[0063] Figure 39 This is a schematic diagram of the non-driving end of the developing cartridge according to Embodiment 14 of this utility model.

[0064] Figure 40A This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are close to each other, according to Embodiment 14 of this utility model.

[0065] Figure 40B This is a side view taken along the longitudinal direction when the developing roller in the developing box and the photosensitive drum in the drum box are separated from each other, according to Embodiment 14 of this utility model.

[0066] Figure 41 This is a perspective view of the developing cartridge involved in Embodiment 14 of this utility model, viewed from bottom to top.

[0067] Figure 42 This is a schematic diagram of the non-driving end of the developing cartridge according to Embodiment 15 of this utility model.

[0068] Figure 43A This is a side view taken in the vertical direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are close to each other, according to Embodiment 15 of this utility model.

[0069] Figure 43B This is a side view taken in the vertical direction when the developing roller in the developing cassette and the photosensitive drum in the drum cassette are separated from each other, according to Embodiment 15 of this utility model. Detailed Implementation

[0070] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, it will be readily apparent to those skilled in the art that the present invention may be implemented in other ways different from those described herein. Therefore, other possible implementations that can be obtained by those skilled in the art based on the embodiments described herein are all within the scope of protection of this application.

[0071] In this invention, the imaging material cartridge includes a processing cartridge and an ink cartridge, as detailed in the specific embodiments.

[0072] Example 1

[0073] like Figures 1 to 4 As shown, the processing cartridge 100 includes a developing cartridge 11 and a drum cartridge 12. The developing cartridge 11 can be installed onto the drum cartridge 12 and can be removed from the drum cartridge 12. In actual use, the developing cartridge 11 can be installed into the electrophotographic imaging device together with the drum cartridge 12 and can be removed from the electrophotographic imaging device together. With the developing cartridge 11 installed into the drum cartridge 12, the developing roller and the photosensitive drum are parallel to each other and face each other. After the developer contained in the developing cartridge 11 is used up, the developing cartridge 11 can be removed from the drum cartridge 12 and a new developing cartridge 11 can be replaced. When the photosensitive drum or other components installed in the drum cartridge 12 reach the end of their service life, a new drum cartridge 12 can also be replaced. The drum cartridge 12 includes a second cartridge body 121 and a photosensitive drum 14. The developing cartridge 11 includes a first cartridge body 111, a separation member 13, a developing roller 15, a powder feeding roller 16, and a stirring mechanism 17. The first cartridge body 111 has a developing agent receiving portion for containing developing agent. The stirring member 17 is disposed in the developing agent receiving portion for stirring the developing agent. The powder feeding roller 16 is used to convey the developing agent to the developing roller 15. The developing roller 15 is used to carry the developing agent.

[0074] like Figure 5As shown, the drum cartridge 12 includes a photosensitive drum 14 and a second housing 121, wherein the photosensitive drum 14 is rotatably mounted on the second housing 121. The second housing 121 has a first abutment portion 1211 and a second abutment portion 1212 at its longitudinal ends, respectively. The first abutment portion 1211 and the second abutment portion 1212 abut against the separation member 13 of the developing cartridge 11, so that when the separation member 13 receives a force applied by the electrophotographic imaging device, the developing roller 15 separates from the photosensitive drum 14. A pusher 123 is disposed at both longitudinal ends of the second housing 121. The second housing 121 also has an elastic mechanism 122 for applying an elastic force to the pusher 123; a spring is shown in the figure, but it is understood that other structures for applying elastic force may be used. The free end of the pusher 123 abuts against the first housing 111 of the developing cartridge 11 and applies a pushing force to the first housing 111 to bring the developing roller 15 into contact with the photosensitive drum 14. In some embodiments, at least a portion of the pusher 123 is made of a conductive material, capable of receiving power from the electrophotographic imaging device and supplying it to the developing cartridge 11. A guide positioning structure may also be provided on the second cartridge 121 to guide the installation of the developing cartridge 11 onto the drum cartridge 12. During installation, the developing cartridge 11 is installed onto the drum cartridge 12 with the developing roller 15 positioned in front, along the installation direction. When in place, the developing roller 15 contacts the photosensitive drum 14.

[0075] like Figure 6 As shown, the separation member 13 is disposed on the first housing 111, preferably on the upper side of the first housing 111, to facilitate the installation of the separation member 13. The separation member 13 includes a force receiving member 131, a connecting rod 132, and a force applying part. The connecting rod 132 extends from the first longitudinal end of the developing cartridge to the second longitudinal end. The force receiving member 131 can receive the force from the electrophotographic imaging device and move accordingly. The force applying part moves in response to the movement of the force receiving member 131 / force receiving part 1311 relative to the drum cassette 12 / second housing 121 / photosensitive drum 14. The developing roller 15 is separated from the photosensitive drum 14. The connecting rod 132 can be driven directly or indirectly by the force applying part.

[0076] Specifically, the separating component 13 includes a force receiving member 131 disposed at the first longitudinal end of the developing cartridge and a connecting rod 132 connected to the force receiving member 131 via a gear and rack mechanism. The connecting rod 132 can be disposed in the recess 1111 of the first cartridge body 111 (e.g., Figure 4 As shown, the connecting rod 132 extends longitudinally along the developing cartridge 11 and from the first longitudinal end of the developing cartridge 11 to the second longitudinal end. It is understood that the connecting rod 132 can also be installed on the first cartridge 111 in other ways. The first force-applying part 1321 and the second force-applying part 1326 are fixedly disposed on the connecting rod 132 and are respectively disposed at the first longitudinal end and the second longitudinal end of the developing cartridge 11.

[0077] Force receiver 131 includes a force receiving part 1311, a rack portion (one embodiment of the active part) 1312, and a guide part 1313, wherein the force receiving part 1311 is used to interact with a force-applying member 1 (such as...) within an electrophotographic imaging device. Figure 2 The rack portion 1312 is fixedly connected to the force receiving portion 1311 and is used to mesh with the gear portion (one embodiment of the driven portion) 1322 on the connecting rod 132. The rack portion 1312 can move with the movement of the force receiving portion 1311. The guide portion 1313 extends partially into the guide channel 1112 provided on the first housing 111. It is understood that the guide channel can also be provided on the force receiving member 131 and the guide portion that cooperates with the guide channel can be provided on the first housing 111. In some embodiments, for example, when the developing cartridge 11 includes an end cap, the guide channel / guide portion that guides the force receiving member 131 can also be provided on the end cap. Along the direction from the first longitudinal end to the second longitudinal end, the connecting rod 132 is provided with a first force applying portion 1321, a gear portion 1322, a limiting portion 1323, 1325 and a second force applying portion 1326 as a first limiting structure, and a rod body 1324 as a connecting portion that is fixedly connected to or integrally formed with each part. The first force-applying part 1321 and the second force-applying part 1326 are both configured as cam-shaped structures. The center of the large-radius arc portion is located at the center of the rod 1324, and the small-radius arc portion extends outward away from the rod 1324. It can be understood that the first force-applying part 1321 and the second force-applying part 1326 may be different from the structure shown in the figure, as long as they protrude radially outward relative to the rod 1324 and can contact the first abutting part 1211 and the second abutting part 1212 of the drum box 12. The limiting parts 1323 and 1325 cooperate with the second limiting structure provided on the first box 111 to restrict the longitudinal movement of the connecting rod 132. The recess 1111 of the first box 111 restricts the movement of the connecting rod 132 in the direction perpendicular to the longitudinal direction. That is, the connecting rod 132 is mounted on the first box 111 in a manner that allows it to rotate relative to the first box 111. This ensures that when the force-applying member 1 applies force to the force-receiving part 1311, the first force-applying part 1321 and the second force-applying part 1326 can respectively abut against the first abutting part 1211 and the second abutting part 1212 of the drum box 12.

[0078] When the processing cartridge 100 begins imaging, the developing roller 15 contacts the photosensitive drum 14 to perform developing and imaging operations. When the processing cartridge 100, installed in the electrophotographic imaging equipment, is not performing imaging operations, for example, when cleaning the photosensitive drum 14 is required, the force-applying member 1 applies a force F to the force receiving part 1311, and pushes the force receiving member 131 to move towards the photosensitive drum 14 in a manner that the guide part 1313 moves along the guide channel 1112. The rack part 1312 drives the gear part 1322 to rotate, thereby causing the first force-applying part 1321 and the second force-applying part 1326 located at both ends of the connecting rod 132 to abut against the first abutting part 1211 and the second abutting part 1212 of the second cartridge body 121, respectively. As the force-applying member 1 further applies force... Force is applied to the force receiving part 1311, and the connecting rod 132 rotates further. The rotation of the connecting rod 132 is restricted because the first force applying part 1321 and the second force applying part 1326 abut against the first abutting part 1211 and the second abutting part 1212, respectively. The reaction force applied by the first abutting part 1211 and the second abutting part 1212 causes the first housing 111 to drive the separating member 13 to move in the opposite direction to the force applied by the force applying member 1, thereby causing the first housing 111 to move away from the photosensitive drum 14. At the same time, the elastic force of the elastic mechanism 122 is overcome to make the pushing member 123 move in this direction, and the developing roller 15 separates from the photosensitive drum 14. When the force-applying member 1 does not apply force to the force-receiving part 1311, the developing cartridge 11 is pushed back to the initial position where the developing roller 15 contacts the photosensitive drum 14 by the pusher 123 under the elastic force of the elastic mechanism 122. The first abutting part 1211 and the second abutting part 1212 respectively push the first force-applying part 1321 and the second force-applying part 1326 to rotate in opposite directions. Due to the meshing of the gear part 1322 and the rack part 1312, the force-receiving member 131 also returns to its initial position, and the processing cartridge 100 can start working.

[0079] In this embodiment, the separation member 13 has a simple structure. By providing a force receiving part at one end of the developing cartridge and transmitting the force that separates the developing roller 15 from the photosensitive drum 14 to the force applying parts provided at both ends of the developing cartridge through the connecting part, the developing roller 15 separates from the photosensitive drum 14 in a direction perpendicular to the longitudinal direction. Compared to the case where force receiving parts are provided at both ends of the developing cartridge, the present invention has a simpler structure and makes the developing cartridge structure more compact. In addition, no other structures are required on the drum box 12. As long as the second box body 121 can abut against the first force applying part 1321 and the second force applying part 1326 of the developing cartridge, the structure of the drum box can also be simplified, thereby simplifying the structure of the processing cartridge. Furthermore, the electrophotographic imaging device only needs to provide a force applying member at one end of the developing cartridge, thereby simplifying the structure of the electrophotographic imaging device.

[0080] In this embodiment, the connecting rod of the separation member transmits the force that separates the developing roller from the photosensitive drum to the first force-applying part and the second force-applying part by rotating. It is understood that in other embodiments, the connecting rod can also transmit the separation force to the first force-applying part and the second force-applying part that abuts against the drum housing by means of translation or other means. In this case, a guide mechanism can be provided on the first housing to guide the connecting part to move in a direction perpendicular to the longitudinal direction, so as to guide the movement of the connecting part in this direction. In addition, the connection between the first force-applying part 1321 and the second force-applying part 1326 and the connecting part can also be achieved by other means, as long as the force can be transmitted.

[0081] In this embodiment, the force-applying member 1 applies force to the developing cartridge in the direction from the rear side of the developing cartridge to the front side of the developing cartridge.

[0082] In this embodiment, the force receiving part 1311 may be disposed at the first longitudinal end or the second longitudinal end of the developing cartridge.

[0083] Example 2

[0084] like Figures 7 to 10 As shown, the processing cartridge 100 includes a developing cartridge 21 and a drum cartridge 22 that can be mounted together. The developing roller 25 and the photosensitive drum 24 are parallel to each other and face each other. After the developer contained in the developing cartridge 21 is used up, the developing cartridge 21 can be removed from the drum cartridge 22 and replaced with a new developing cartridge 21. When the photosensitive drum 24 or other components installed in the drum cartridge 22 reach the end of their service life, a new drum cartridge 22 can also be replaced. The drum cartridge 22 includes a second cartridge body 221 and a photosensitive drum 24. The developing cartridge 21 includes a first cartridge body 211, a separation member 23, a developing roller 25, a powder feeding roller 26, and a stirring mechanism 27. The first cartridge body 211 has a developer container for containing developer, and the stirring member 27 is disposed in the developer container.

[0085] The drum housing 22 includes a photosensitive drum 24 and a second housing 221, wherein the photosensitive drum 24 is rotatably mounted on the second housing 221. The second housing 221 has a first abutment portion 2211 and a second abutment portion (not labeled in the figure, corresponding to the first abutment portion 2111) at its longitudinal ends. The first abutment portion 2211 and the second abutment portion abut against the separation member 23 of the developing cartridge 21, so that when the separation member 23 receives a force F applied by the electrophotographic imaging device, the developing roller 25 separates from the photosensitive drum 24. The second housing 221 may also be provided with a pushing member and an elastic mechanism, which apply a pushing force to the first housing 211 to bring the developing roller 25 into contact with the photosensitive drum 24. The second housing 221 can also be provided with a guide positioning structure to guide the installation of the developing housing 21 onto the drum housing 22. When the developing housing 21 is installed onto the drum housing 22, it is installed along the installation direction with the developing roller 25 positioned on the front side. When it is installed in place, the developing roller 25 contacts the photosensitive drum 24.

[0086] The separating component 23 includes a connecting rod 231 and a spring 232 sleeved on the connecting rod 231 and abutting against the first housing 211. The spring 232 is a torsion spring and is provided as a reset mechanism. It is understood that the reset mechanism may also be provided in other ways. The connecting rod 231 is disposed in the recess 2111 of the first housing 211 and extends longitudinally along the developing cartridge 21, extending from the first longitudinal end of the developing cartridge 21 to the second longitudinal end. The force receiving part 2311 is disposed at the first longitudinal end of the connecting rod 231, and the first force applying part 2312 is also disposed at this end and has a certain angle with the force receiving part 2311. The rod body 2313, which is the connecting part, is also provided with a limiting part 2314 as a first limiting structure. The second force applying part 2315 is disposed at the second longitudinal end of the rod body 2313. The second force-applying part 2315 is configured as a cam-shaped structure, with the center of its large-radius arc portion located at the center of the rod 2313, and the small-radius arc portion extending outward away from the rod 2313. The limiting part 2314 cooperates with the second limiting structure provided on the first box 211 to restrict the longitudinal movement of the connecting rod 231. The recess 2111 of the first box 211 restricts the movement of the connecting rod 231 in a direction perpendicular to the longitudinal direction. That is, the connecting rod 231 is mounted on the first box 211 in a manner that allows it to rotate relative to the first box 211. This ensures that when the force-applying member 1 applies force to the force-receiving part 2311, the first force-applying part 2312 and the second force-applying part 2315 can respectively abut against the first abutting part 2211 and the second abutting part of the drum box 22.

[0087] When the processing cartridge 200 starts working, the developing roller 25 contacts the photosensitive drum 24 to perform developing and imaging operations. When the processing cartridge 200 installed in the electrophotographic imaging equipment is not performing imaging work (such as when cleaning the photosensitive drum 24 is required), the force-applying member 1 applies a force F to the force receiving part 2311 and pushes the connecting rod 231 to rotate against the elastic force / restoring force of the spring 232. This causes the first force-applying part 2312 and the second force-applying part 2315 located at both ends of the connecting rod 231 to abut against the two abutting parts of the drum cassette 221. As the force-applying member 1 further applies force to the force receiving part 2311, the connecting rod 231 rotates further. The rotation of the connecting rod 231 is restricted because the first force-applying part 2312 and the second force-applying part 2315 abut against the first abutting part 2211 and the second abutting part, respectively. The reaction force applied by the two abutting parts causes the first cassette 211 to drive the connecting rod 231 to move in the opposite direction to the force F applied by the force-applying member 1. This causes the first cassette 211 to move away from the photosensitive drum 24, and the developing roller 25 separates from the photosensitive drum 24. When the force-applying member 1 does not apply force to the force receiving part 2311, under the action of the elastic force of the elastic mechanism, the developing cartridge 21 is pushed back to the initial position where the developing roller 25 contacts the photosensitive drum 24 by the pusher. Under the action of the elastic force, the spring 232 causes the connecting rod 231 to rotate in the opposite direction, so that the connecting rod 231 returns to the initial position when it is not subjected to the force applied by the force-applying member 1, and the processing cartridge 200 can start working.

[0088] It is understood that, in Embodiment 1, the developing cartridge may also be provided with a reset mechanism to return the force receiving element or connecting rod to its initial position.

[0089] Example 3

[0090] In this embodiment, the component names that are the same as those in the above embodiments will continue to be used, and the same components will not be described again here, but the corresponding numbers of each component will be the same as in Embodiment 1.

[0091] In the above embodiments and this embodiment, the developing roller 15 rotates around the rotation axis L. The longitudinal direction is parallel to the direction in which the rotation axis L extends. The developing cartridge 11 also includes a driving head 18. Along the longitudinal direction, the driving head 18 is located at one end of the first cartridge body 111. The driving head 18 is used to receive driving force from the electrophotographic imaging device (hereinafter referred to as "imaging device") to drive the developing roller 15 to rotate. Therefore, the first longitudinal end can also be regarded as the driving end of the developing cartridge 11 / processing cartridge 100. Along the longitudinal direction, the second longitudinal end is arranged opposite to the first longitudinal end. The second longitudinal end can be regarded as the non-driving end of the developing cartridge 11 / processing cartridge 100.

[0092] like Figure 11 and Figure 14As shown, the drum housing 12 also includes a housing-side force-applying member 124. The housing-side force-applying member 124 is rotatably disposed on the second housing 121 in such a way that it can rotate about an axis extending in the longitudinal direction. The housing-side force-applying member 124 has a first part 124a, a second part 124b and a third part 124c. The first part 124a and the second part 124b are both connected to the third part 124c. The housing-side force-applying member 124 rotates about the third part 124c. The first part 124a is used to receive the force F applied by the force-applying member 1 in the imaging device, and the second part 124b is used to transmit the force F to the separation member 13.

[0093] like Figure 12A As shown, in this embodiment, the force receiving member 131 is configured to rotate about an axis parallel to the longitudinal direction, in conjunction with... Figure 13 and Figure 14 When the force-applying member 1 applies force F to the first part 124a, the force-applying member 124 on the box side moves around the third part 124c along... Figure 14 Rotating in the direction shown by r2, the second part 124b pushes the force receiving part 1311, causing the force receiving member 131 to rotate along... Figure 13 When the force receiver 131 rotates in the direction indicated by r1, the protrusion 1312 (another embodiment of the active part) on the force receiver 131 moves along with the force receiver 1311 and transmits the force F to the abutted part 1322 (another embodiment of the driven part) on the first force-applying part 1321. Subsequently, the first force-applying part 1321 abuts against the second abutting part 1212 on the drum box 12. At the same time, the force is also transmitted to the second force-applying part 1326 through the rod 1324. The second force-applying part 1326 abuts against the first abutting part 1211 on the drum box 12. In this embodiment, the protrusion 1312 transmits the force by directly abutting against the abutted part 1322.

[0094] Similarly, during processing cartridge 100 operation / imaging, developing roller 15 contacts photosensitive drum 14. When processing cartridge 100 is not performing imaging, for example, when cleaning photosensitive drum 14 is required, force-applying member 1 begins to apply force F to first part 124a, ultimately causing first force-applying part 1321 and second force-applying part 1326 to abut against second abutting part 1212 and first abutting part 1211 respectively, thus restricting the rotation of connecting rod 132. The reaction force applied by first abutting part 1211 and first abutting part 1212 causes first cartridge body 111 to move. The developing roller 15 moves away from the photosensitive drum 14, and the developing roller 15 separates from the photosensitive drum 14. That is, the first force-applying part 1321 and the second force-applying part 1326 move in response to the force receiving part 1311 relative to the movement of the drum cassette 12 / second cassette 121 / photosensitive drum 14. Preferably, the first cassette 111 moves in the opposite direction to the force F applied by the force-applying member 1. At the same time, the elastic force of the elastic mechanism 122 is overcome, and the pushing member 123 also moves away from the photosensitive drum 14. Thus, the developing roller 15 separates from the photosensitive drum 14.

[0095] When the force-applying member 1 does not apply force F to the first part 124a, the developing cartridge 11 is pushed back to the initial position where the developing roller 15 contacts the photosensitive drum 14 by the pusher member 123 under the elastic force of the elastic mechanism 122. The second abutting part 1212 and the first abutting part 1211 respectively push the first force-applying part 1321 and the second force-applying part 1326 to rotate in opposite directions. Through the abutment of the first force-applying part 1321 and the protrusion 1312, the force receiving member 131 also returns to its initial position. At the same time, the cartridge-side force-applying member 124 is also reset, and the processing cartridge 100 can start imaging.

[0096] In some embodiments, the developing cartridge 11 may also be provided with a reset member for resetting at least one of the force receiver 131 and the cartridge-side force applicator 124, so as to ensure that the force receiver 131 and the cartridge-side force applicator 124 can return to their respective initial positions.

[0097] Similar to Embodiment 1, in the developing cartridge 11 of this embodiment, only a force receiving member 131 needs to be provided at the driving end. The force that separates the developing roller 15 and the photosensitive drum 14 is transmitted to the non-driving end through the connecting part 1324, so as to realize the separation of the developing roller 15 and the photosensitive drum 14. The structure of the developing cartridge 11 in this embodiment is also simple and compact. Correspondingly, only a cartridge-side force applying member 124 needs to be provided at the driving end of the drum cartridge 12. Therefore, the structure of the processing cartridge 100 is also simple. Furthermore, the imaging device only needs to provide a force applying member 1 at the driving end of the processing cartridge 100 / developing cartridge 11. Thus, the structure of the imaging device is also simplified.

[0098] Based on the above-mentioned inventive concept, the force-applying member 124 and the force-receiving member 131 can also be provided only at the non-driving end. Through the connecting part 1324, the first force-applying part 1321 provided at the driving end can also receive the force F, thereby realizing the separation of the developing roller 15 and the photosensitive drum 14. The developing cartridge 11 with this structure also has the advantages of simple and compact structure, and the structure of the processing cartridge 100 and the imaging device can also be simplified.

[0099] In some embodiments, the developing cartridge 11 further includes a chip assembly 300, which includes a chip holder 31 connected to the first cartridge body 111 and a chip 32 supported by the chip holder 31. When the developing cartridge 11 is installed in an imaging device, the chip 32 interacts with the stylus 403 (e.g., in the imaging device). Figure 13 (As shown) Electrical connection, thereby establishing a communication connection between the developing cartridge 11 / processing cartridge 100 and the imaging device.

[0100] Furthermore, the developing cartridge 11 also includes a drive force transmission assembly 5 for transmitting the drive force received by the drive head 18 to various components in the developing cartridge 11, such as... Figure 12B As shown, the driving force transmission assembly 5 includes a driving force transmission section 51, an intermediate component, a first driving force receiving section 54, a second driving force receiving section 55, and a third driving force receiving section 57. The driving force transmission section 51 is coaxially arranged with the driving head 18. The intermediate component is used to transmit the driving force of the driving force transmission section 51. The first driving force receiving section 54 is coaxially arranged with the powder feeding roller 16 as a powder feeding roller driving component. The second driving force receiving section 55 is coaxially arranged with the developing roller 15 as a developing roller driving component. The third driving force receiving section 57 is coaxially arranged with the stirring mechanism 17 as a stirring mechanism driving component. In this way, the developing roller 15, the powder feeding roller 16, and the stirring mechanism 17 can be driven respectively.

[0101] Specifically, the drive force transmission unit 51, the first drive force receiving unit 54, the second drive force receiving unit 55, and the third drive force receiving unit 57 are all configured as gears. The intermediate component includes at least one idler wheel. More specifically, the intermediate component includes a first idler wheel / first intermediate component 52, a second idler wheel / second intermediate component 53, and a third idler wheel / third intermediate component 56. The first idler wheel / first intermediate component 52 simultaneously meshes with the drive force transmission unit 51 and the second idler wheel / second intermediate component 53, that is, the first idler wheel / first intermediate component 52 is connected to the second idler wheel. The second idler wheel / second intermediate part 53 and the driving force transmission part 51 are also connected. The second idler wheel / second intermediate part 53 also meshes with the developing roller gear / second driving force receiving part 55 and the powder feeding roller gear / first driving force receiving part 54. The third idler wheel / third intermediate part 56 includes a large gear / large diameter part 561 and a small gear / small diameter part 562 arranged coaxially. The driving force transmission part 51 also meshes with the large gear / large diameter part 561, and the small gear / small diameter part also meshes with the stirring mechanism gear / third driving force receiving part 57. This gear arrangement is beneficial for the miniaturization design of the developing cartridge.

[0102] In some embodiments, the driving force transmission part 51 may also be configured as a ratchet, friction wheel, etc., and each driving force receiving part may also be configured as a ratchet, friction wheel, etc. Therefore, the above-mentioned meshing is only one way of connecting the corresponding components.

[0103] In some embodiments, the driving force transmission component 5 can also transmit driving force via a belt.

[0104] In some embodiments, the third idler wheel / third intermediate part 56 and the stirring mechanism gear / third driving force receiving part 57 may be omitted, thus making the driving force transmission assembly 5 simpler.

[0105] Example 4

[0106] Unlike Embodiment 3, in this embodiment, the rod 1324 is configured to move at least along a straight line, the direction of which the straight line extends only as long as it is not perpendicular to the longitudinal direction. Preferably, the rod 1324 moves along a direction parallel to the longitudinal direction.

[0107] like Figures 15-18 As shown, the force receiving member 131 is also configured to rotate about an axis parallel to the longitudinal direction, wherein a force receiving part 1311 and a protrusion 1312 are provided, and the connecting rod 132 includes a rod body 1324 and a contacting part 1322 and a second force applying part 1326 located at both ends of the rod body 1324; as Figure 17As shown, the abutting portion 1322 is provided with an abutting surface 1328 that is inclined relative to the longitudinal direction, and the protrusion 1312 is provided with an abutting surface 1314 for abutting against the abutting surface 1328. The shape of the abutting surface 1314 should not be restricted, as long as the abutting surface 1314 can transmit force to the abutting surface 1328. Conversely, the abutting surface 1314 is set to be inclined relative to the longitudinal direction, while the shape of the abutting surface 1328 is not restricted. That is, at least one of the abutting surface 1314 and the abutting surface 1328 can be set to be an inclined surface that is inclined relative to the longitudinal direction. Specifically, the abutting surface 1314 transmits force by pressing against the abutting surface 1328. Preferably, the abutting surface 1314 is set to be able to match the abutting surface 1328, so that the transmission of force will be smoother.

[0108] Preferably, the developing cartridge 11 is provided with a guide path 1122, and the first force-applying part 1321 in the separating member 13 is disposed on the force receiving member 131, or the first force-applying part 1321 is configured to move with the force receiving member 131; when the force-applying member 1 of the imaging device applies a force F to the first part 124a, the cartridge-side force-applying member 124 moves along Figure 16 Rotating in the direction shown by r2, the second part 124b pushes the force receiving part 1311, causing the force receiving member 131 to rotate along... Figure 16 When the protrusion 1312 rotates in the direction indicated by r1, it moves in accordance with the movement of the force receiving part 1311. The contact surface 1314 abuts against the contact surface 1328. Under the constraint of the guide path 1122, the connecting part 1324 translates along the predetermined path. In this way, the force can be transmitted to the non-driving end / second longitudinal end.

[0109] Continue as Figure 17 As shown, the second force-applying part 1326 is also provided with a pressing surface 1327 that is inclined relative to the longitudinal direction. As the force is transmitted to the non-drive end / second longitudinal end, the second force-applying part 1326 is pushed by the rod 1324, and the pressing surface 1327 abuts against the first abutting part 1211 and is pressed. At this time, at the drive end / first longitudinal end of the developing cartridge 11, the first force-applying part 1321 abuts against the second abutting part 1212, and at the non-drive end / second longitudinal end of the developing cartridge 11, the second force-applying part 1326 / pressing surface 1327 abuts against the first abutting part 1211. The reaction force applied by the first abutting part 1211 and the second abutting part 1212 causes the first cartridge body 111 to drive the developing roller 15 to move away from the photosensitive drum 14. Therefore, the developing roller 15 and the photosensitive drum 14 separate from each other.

[0110] Furthermore, the separating member 13 in this embodiment also includes a first reset member (part of the reset mechanism) 133. When the force-applying member 1 applies force F, the first reset member 133 accumulates reset force. When the force F is removed, the first reset member 133 releases the reset force, and the connecting part 1324 resets. At the same time, under the action of the abutting surface 1328 and the abutting surface 1314, the force receiving member 131 also resets.

[0111] Preferably, the developing cartridge 11 further includes a second reset member (part of the reset mechanism) 134 connected to the force receiving member 131. When the force applying member 1 applies force F, the second reset member 134 accumulates reset force. When the force F is removed, the second reset member 134 releases the reset force, so that the force receiving member 131 can be reset more smoothly.

[0112] In some embodiments, the developing cartridge 11 also includes a guide plate 19 for guiding the movement of the second force-applying part 1326. When the pressing surface 1327 is pressed, causing the second force-applying part 1326 to move away from the photosensitive drum 14, the direction of movement of the second force-applying part 1326 can be guided by the guide plate 19 to ensure that the developing cartridge 11 / second force-applying part 1326 moves in a predetermined direction.

[0113] As described above, in the developing cartridge 11 of this embodiment, only one force receiving member 131 needs to be provided at the driving end and the non-driving end. The force that separates the developing roller 15 and the photosensitive drum 14 is transmitted to the other end through the connecting part 1324, so as to realize the separation of the developing roller 15 and the photosensitive drum 14. The structure of the developing cartridge 11 in this embodiment is also simple and compact. Correspondingly, only one cartridge-side force applying member 124 needs to be provided at the driving end in the drum cartridge 12. Therefore, the structure of the processing cartridge 100 is also simple. Furthermore, the imaging device only needs to provide the force applying member 1 at the driving end of the processing cartridge 100 / developing cartridge 11. Thus, the structure of the imaging device is also simplified.

[0114] Example 5

[0115] Based on Example 4, this example further simplifies the separation component 13, such as... Figures 19-21 As shown, in this embodiment, the force receiving part 1311 is provided with a force receiving surface that is not parallel to the longitudinal direction. The force receiving surface is set as an inclined surface / spiral surface. According to the rotation direction r2 of the box-side force-applying member 124 after being driven by force F, the force receiving surface extends along the rotation direction r2. In the longitudinal direction, the force receiving surface extends gradually away from the first box body 111. The structure of the separation member 13 at the non-driving end is the same as in embodiment 4, such as... Figure 21 As shown, at the non-driving end, the developing cartridge 11 is also provided with a second force-applying part 1326, which has a pressing surface 1327 that is inclined relative to the longitudinal direction.

[0116] When the force-applying component 1 of the imaging device applies a force F to the force-applying component 124 on the cartridge side, the second part 124b begins to abut against the force-receiving surface. The force-receiving surface decomposes the force F into a first component force along the longitudinal direction and a second component force along the direction intersecting the longitudinal direction. The first component force forces the developing cartridge 11 to move as a whole along the longitudinal direction. The force is transmitted from the driving end to the non-driving end through the first cartridge body 111. The pressing surface 1327 located at the non-driving end abuts against the first abutting part 1211, thereby causing the developing roller 15 to contact the photosensitive drum 14. At least at the end where the extrusion surface 1327 is provided, the two components of force force the end of the developing cartridge 11 where the force receiving part 1311 is provided to move away from the photosensitive drum 14, thereby causing the developing roller 15 and the photosensitive drum 14 to separate at least at the end where the force receiving part 1311 is provided. Thus, at both the driving end and the non-driving end of the developing cartridge 11, the developing roller 15 and the photosensitive drum 14 are separated from each other. At the same time, the elastic force of the elastic mechanism 122 is overcome, and the pushing member 123 moves away from the photosensitive drum 14.

[0117] When force F is removed, elastic mechanism 122 releases elastic force, and pusher 123 forces the developing cartridge 11 to move closer to the photosensitive drum 14, and the developing roller 15 and the photosensitive drum 14 move closer to each other again.

[0118] Compared to Embodiment 4, the separating member 13 in this embodiment does not need to be provided with the connecting part 1324. In other words, the connecting part 1324 in this embodiment is the first box body 111 itself, and the force receiving part 1311 can be regarded as the first force applying part 1321. Correspondingly, the box-side force applying member 124 can be regarded as the second abutting part 1212. It can be seen that the structure of the developing box 11 and the drum box 12 in this embodiment can be further simplified. Preferably, in this embodiment, the force receiving member 131 is fixedly disposed on the first housing 111. When the force applying member 124 applies force F to the force receiving part 1311, the force receiving part 1311, which is equivalent to the first force applying part 1321, will move along with the movement of the first housing 111 relative to the drum housing 12 / second housing 121 / photosensitive drum 14. In other words, the first force applying part 1321 moves in response to the movement of the force receiving part 1311 relative to the drum housing 12 / second housing 121 / photosensitive drum 14. At the same time, the second force applying part 1326 also moves along with the movement of the first housing 111 relative to the drum housing 12 / second housing 121 / photosensitive drum 14. In other words, the second force applying part 1326 also moves in response to the movement of the force receiving part 1311 relative to the drum housing 12 / second housing 121 / photosensitive drum 14. The developing roller 15 and the photosensitive drum 14 are separated from each other.

[0119] Example 6

[0120] like Figure 22A , Figure 22B , Figure 23 , Figure 24 and Figure 25 As shown, for clarity in the following description, the direction parallel to the longitudinal direction is defined as the left-right direction, the direction intersecting with the longitudinal direction is defined as the front-back / lateral direction, and the direction intersecting with both the longitudinal and front-back directions is defined as the up-down / vertical direction. Preferably, the left-right, front-back, and up-down directions are perpendicular to each other. Specifically, along the left-right direction, the drive end is located to the left of the developing cartridge 11, and the opposite of the left is the right. Along the front-back direction, the developing roller 15 is located in front of the developing cartridge 11, and the opposite of the front is the rear. Along the up-down direction, the exposed side of the developing roller 15 is the upper side, and the opposite of the upper side is the lower side.

[0121] First, the structure of the drum box 12 will be further described, such as... Figure 22A As shown, the drum cartridge 12 also includes a first support member 141 and a second support member 142 disposed in the second cartridge body 121. The first support member 141 and the second support member 142 are disposed at intervals opposite to each other along the longitudinal direction of the developing cartridge. The photosensitive drum 14 is supported by the first support member 141 and the second support member 142. The first support member 141 includes a first support body 141a and a first extension 141b connected to each other. The first support body 141a is used to support the photosensitive drum 14, and the first extension 141b extends from the first support body 141a and is used to support at least a part of the developing cartridge 11.

[0122] The first extension 141b includes a first upper extension 141d and a first lower extension 141c spaced apart in the vertical direction. A first intermediate portion 141g connects the first upper extension 141d and the first lower extension 141c. In the front-rear direction, both the first upper extension 141d and the first lower extension 141c extend rearward from the first intermediate portion 141g. In the front-rear direction, at least a portion of the first intermediate portion 141g faces rearward. In the vertical direction, a first mounting space 141e is formed between the first upper extension 141d and the first lower extension 141c. The first mounting space 141e opens rearward. The first upper extension 141d has a first lower surface 141f facing the first mounting space 141e.

[0123] The second support member 142 has a structure that is basically the same as that of the first support member 141, such as Figure 22B As shown, the second support member 142 includes a second support body 142a and a second extension 142b connected to each other. The second support body 142a is used to support the photosensitive drum 14, and the second extension 142b extends from the second support body 142a to support at least a portion of the developing cartridge 11.

[0124] The second extension 142b includes a second upper extension 142d and a second lower extension 142c spaced apart in the vertical direction. A second intermediate portion 142g connects the second upper extension 142d and the second lower extension 142c. In the front-rear direction, both the second upper extension 142d and the second lower extension 142c extend rearward from the second intermediate portion 142g. In the front-rear direction, at least a portion of the second intermediate portion 142g faces rearward. In the vertical direction, a second mounting space 142e is formed between the second upper extension 142d and the second lower extension 142c. The second mounting space 142e opens rearward. The second upper extension 142d has a second lower surface 142f facing the second mounting space 142e.

[0125] Furthermore, along the left-right direction, the second box body 121 also has a left side wall 1210L and a right side wall 1210R spaced apart. A first support member 141 is disposed near the right side wall 1210R, and a second support member 142 is disposed near the left side wall 1210L. The first support member 141 and the second support member 142 are disposed between the left side wall 1210L and the right side wall 1210R. The box-side force-applying member 124 is exposed from the left side wall 1210L.

[0126] Continue as Figure 22A and Figure 22B As shown, the pusher 123 includes a left pusher 123L and a right pusher 123R spaced apart in the left-right direction. In the front-back direction, the left pusher 123L is opposite to the left support 142, and the right pusher 123R is opposite to the right support 141.

[0127] In the developing cartridge 11 involved in this embodiment, the structure of the force receiving part 1311 located at the driving end is the same as that in embodiment 5, and will not be described again here. The structure of the second force applying part 1326 located at the non-driving end has been changed.

[0128] like Figure 23 As shown, the developing cartridge 11 also includes a bracket 1113, a right forced push portion 1115R, a second force application portion 1326, and a third reset member (part of the reset mechanism) 135 disposed at the non-drive end. The developing roller 15 is rotatably supported by the bracket 1113, which is connected to the first cartridge body 111. The second force application portion 1326 and the right forced push portion 1115R are disposed on the bracket 1113, which can improve the versatility of the first cartridge body 111. The second force application portion 1326 is also provided with a pressing surface 1327. The pressing surface 1327 is configured such that the distance between the pressing surface 1327 and the rotation axis L in the direction perpendicular to the rotation axis gradually decreases from left to right. When the developing cartridge 11 is installed on the drum cartridge 12, the pressing surface 1327 is opposite to the first lower surface 141f in the up-down direction and opposite to the first support member 141 in the left-right direction.

[0129] This embodiment, as well as the following embodiments 7 and 8, focuses on describing the extrusion surface 1327 being disposed at the non-driving end, and the developing cartridge 11 receiving the separation force applied by the force-applying member 1 of the imaging device at the driving end. However, it is understood that the extrusion surface 1327 may also be disposed at the driving end, and the developing cartridge 11 receiving the separation force applied by the force-applying member 1 of the imaging device at the non-driving end.

[0130] A right-hand pusher portion 1115R protrudes from the support 1113 and abuts against the right pusher 123R, keeping the developing roller 15 and the photosensitive drum 14 in contact / close proximity. In some embodiments, when a portion of the right pusher 123R is made of a conductive material, the right pusher 123R can also supply power to the developing roller 15. Figure 22B As shown, a power receiver 125 is provided on the non-driving side of the drum box 12, and the right pusher 123R contacts the power receiver 125 to receive power.

[0131] The third reset member 135 includes at least an elastic member 1351. When the force receiving part 1311 receives the separation force, the developing roller 15 and the photosensitive drum 14 separate from each other at the first longitudinal end of the developing cartridge 11. At the same time, the developing cartridge 11 moves to the right, the elastic member 1351 undergoes elastic deformation, and the pressing surface 1327 presses against the first support member 141. Conversely, the first support member 141 applies a reaction force to the pressing surface 1327. Under the action of this reaction force, the developing cartridge 11 moves backward. At the second longitudinal end, the developing roller 15 and the photosensitive drum 14 also separate from each other. Finally, along the left and right direction, the developing roller 15 and the photosensitive drum 14 complete the separation from each other. At the same time, the pusher 123 (including the left pusher 123L and the right pusher 123R) is pushed by the developing cartridge 11, causing the elastic mechanism 122 to accumulate elastic force. When the separation force is removed, the elastic member 1351 releases the elastic force, and the developing cartridge 11 moves to the left. At the same time, the elastic mechanism 122 releases the elastic force, and the pusher 123 pushes the developing cartridge 11 forward to reset.

[0132] In this embodiment, the first support member 141 has a portion for pressing against the pressing surface 1327, such as... Figure 22A and Figure 24As shown, the portion used for pressing against the extrusion surface 1327 is the edge / face (first abutment portion) 1211 of the first support member 141. The edge / face 1211 (first abutment portion) is adjacent to the first lower surface 141f. In the front-back direction, the extrusion surface 1327 is located in front of the rotation axis L of the developing roller 15. When both the extrusion surface 1327 and the developing roller 15 are projected along a direction perpendicular to the rotation axis L, at least a portion of the developing roller 15 overlaps with the extrusion surface 1327. As can be seen from the description of this embodiment and the above embodiments, the first abutment portion 1211 can be provided on the second housing 121 or on the first support member 141.

[0133] In some embodiments, the third reset member 135 further includes an abutment block 1352. Preferably, the elastic member 1351 is disposed between the abutment block 1352 and the first housing 111 / support 1113. On the one hand, the abutment block 1352 can protect the elastic member 1351. On the other hand, the abutment block 1352 can also limit the movement trajectory of the elastic member 1351 to ensure that the developing cartridge 11 moves along a predetermined path. More preferably, the abutment block 1352 is also provided with a mating part 1353. Through the mating part 1353, the position of the abutment block 1352 in the developing cartridge 11 can be accurately positioned, so that the movement trajectory of the elastic member 1351 can be effectively controlled by the abutment block 1352. Correspondingly, the right side wall 1210R is provided with a mating part 121a for mating with the mating part 1353.

[0134] In one embodiment of the mating part 1353, such as Figure 24 As shown, both the mating part 1353 and the mating part 121a are configured as stepped parts that can mate with each other; it is also possible that the mating part 1353 and the mating part 121a can be configured as a shaft hole mating structure, a keyway mating structure, etc.

[0135] In a deformable embodiment, at least one of the right-hand pushing portion 1115R and the second force-applying portion 1326 may also be provided on the first housing 111. As described above, in this embodiment, the pressing surface 1327 is configured to face upwards. When the developing cartridge 11 is installed into the drum housing 12, preferably, there is a first gap between the pressing surface 1327 and the first abutting portion 1211, which is between 0.5mm and 3mm, to ensure that the developing roller 15 and the photosensitive drum 14 maintain stable contact during imaging operation; more preferably, there is a second gap g between the second force-applying portion 1326 and the photosensitive drum 14, which is between 1mm and 5mm, to prevent the photosensitive drum 14 from colliding with the second force-applying portion 1326 and being damaged.

[0136] Furthermore, when the first force-applying part 1321 receives the force applied by the force-applying member 1, the developing cartridge 100 will move to the right, and the pressing surface 1327 will begin to abut against the first abutting part 1211 and be pressed. The developing cartridge 11 has a tendency to be pressed downward. That is to say, the upward movement that the developing cartridge 11 may generate is stopped. Under the guidance of the first lower extension 141c, the developing cartridge 11 moves backward, and the developing roller 15 and the photosensitive drum 14 separate from each other.

[0137] The following is combined Figure 24 and Figure 25 The installation process of the developing cartridge 11 toward the drum cartridge 12 in this embodiment is described.

[0138] First, the developing cartridge 11 approaches the drum cassette 12 in an inverted position (with the developing roller 15 located downstream in the installation direction). The developing cartridge 11 is provided with a left positioning part 1116L and a right positioning part 1116R at the driving end and the non-driving end, respectively. The left positioning part 1116L and the right positioning part 1116R abut against the second upper extension part 142d and the first upper extension part 141d, respectively. In this way, the developing cartridge 11 is initially positioned in the drum cassette 12, and the developing cartridge 11 is in the first state.

[0139] Subsequently, the right forced push portion 1115R begins to slide and abut against the right forced push member 123R. The developing cartridge 11 rotates with the abutment position of the right forced push portion 1115R and the right forced push member 123R as the support point until the mating part 1353 and the mating part 121a complete the mating. At this time, the extrusion surface 1327 is opposite to the first abutment part 1211. At the driving end of the developing cartridge 11, the developing cartridge 11 can also rotate with the sliding abutment position of the left forced push portion 1115L and the left forced push member 123L as the support point. The developing cartridge 11 is forced by the forced push member 123, causing the developing roller 15 and the photosensitive drum 14 to approach / contact each other. The developing cartridge 11 is in the second state.

[0140] In some embodiments, the extrusion surface 1327 can also be configured such that when the developing cartridge 11 is installed onto the drum cartridge 12, the extrusion surface 1327 is opposite to the first intermediate portion 141g in the front-back direction, that is, the extrusion surface 1327 is set to face forward. The part of the first support member 141 used to extrude the extrusion surface 1327 is still the edge / face (first abutment portion) 1211 of the first support member 141, which is adjacent to the first mounting space 141e. When the developing cartridge 11 moves to the right so that the extrusion surface 1327 abuts against the first abutment portion 1211, the developing cartridge 11 will move directly backward, and the developing roller 15 and the photosensitive drum 14 will separate from each other. In this structure, the upward movement that the developing cartridge 11 may generate can also be blocked by the first upper extension portion 141d.

[0141] Example 7

[0142] like Figure 26 As shown, the same components and structures as in the above embodiments will not be described again here. In this embodiment, the second force-applying part 1326 is configured as a protrusion protruding from the first housing 111 or the bracket 1113, and the extrusion surface 1327 is an inclined surface provided on the second force-applying part 1326. Its inclination direction is such that the distance between the extrusion surface 1327 and the rotation axis L of the developing roller 15 gradually increases in the front-back direction along the left-to-right direction. The first abutting part 1211 for abutting against the extrusion surface 1327 extends to the left from the right side wall 1210R.

[0143] Compared to Embodiment 6, in this embodiment, the extrusion surface 1327 is positioned further away from the developing roller 15 along the front-back direction. Preferably, the extrusion surface 1327 is positioned on the rear side of the developing roller 15, thereby preventing the second force-applying part 1326 with the extrusion surface 1327 from contacting the photosensitive drum 14 during the installation of the developing cartridge 11 toward the drum cartridge 12. Preferably, a gap is formed between the extrusion surface 1327 and the first abutment part 1211 before the driving end of the developing cartridge 11 receives the separation force, to ensure that the developing roller 15 and the photosensitive drum 14 maintain stable contact.

[0144] Example 8

[0145] like Figure 27A and Figure 27B As shown, in this embodiment, the second force-applying part 1326 / compression surface 1327 provided at the non-driving end is configured to abut against a component in the imaging device. That is, the first abutting part 1211 is no longer provided in the drum box 12, or in other words, the first abutting part 1211 for mutual compression with the compression surface 1327 is provided in the imaging device.

[0146] like Figure 27A As shown, the imaging device is equipped with a guide rail 9. During the installation or removal of the developing cartridge 11 / processing cartridge 100 from the imaging device, the developing cartridge 11 / processing cartridge 100 is guided by the guide rail 9. Specifically, the imaging device also includes a guided protrusion / second force-applying part 1326 disposed at the non-drive end. A pressing surface 1327 is disposed on the guided protrusion 1326. Preferably, the pressing surface 1327 is an inclined surface disposed on the guiding protrusion 1326. The inclined surface can be either an inclined plane or an inclined arc surface. Figure 27A An embodiment is shown in which the extrusion surface 1327 is configured as a conical surface.

[0147] When the driving end of the developing cartridge 11 receives a separating force and causes the developing cartridge 11 to move to the right, the pressing surface 1327 presses against the guide surface 91 provided on the guide rail 9 or the edge / face adjacent to the guide surface 91 until at least a portion of the pressing surface 1327 reaches above the guide surface 91.

[0148] Example 9

[0149] like Figure 28 , Figure 29A and Figure 29B As shown, the force-applying member 1 can be disposed at the driving end of the developing cartridge 11, or at the non-driving end of the developing cartridge 11, or at both the driving end and the non-driving end of the developing cartridge 11. That is, the force-applying member 1 includes at least one of a left force-applying member located at the driving end of the developing cartridge 11 and a right force-applying member located at the non-driving end of the developing cartridge 11.

[0150] In some embodiments, when the force-applying member 1 is simultaneously disposed at the driving end and the non-driving end of the developing cartridge 11, the left force-applying member applies a separation force to the cartridge-side force-applying member 124, and then the cartridge-side force-applying member 124 applies the separation force to the developing cartridge 11, while the right force-applying member directly applies a separation force to the developing cartridge 11.

[0151] like Figure 28 As shown, the imaging device also includes a driving force output component 92 for engaging with the driving head 18 in the developing cartridge 11 to transmit driving force, and an elastic component 93 abutting against the driving force output component 92. That is, the driving force output component 92 is used to output driving force to the developing cartridge 11, and the elastic component 93 is used to push the driving force output component 92 toward the developing cartridge 11. In this way, the driving force output component 92 can form a stable engagement with the driving head 18. Therefore, after the developing cartridge 11 completes its engagement with the driving force output component 92, under the pushing action of the elastic component 93, the developing cartridge 11 has a tendency to move to the right. Based on the above inventive concept, when the non-driving end of the developing cartridge 11 is provided with a pressing surface 1327, it is possible that even if the left force-applying component does not apply a separation force to the developing cartridge 11, the developing roller 15 and the photosensitive drum 14 will separate from each other due to the rearward movement of the developing cartridge 11.

[0152] Therefore, in this embodiment, the developing cartridge 11 will achieve the separation of the developing roller 15 and the photosensitive drum 14 by receiving the separation force applied by the right force-applying member.

[0153] Specifically, such as Figure 28 As shown, the developing cartridge 11 includes a second force-applying part 1326 disposed at the drive end and a first force-applying part 1321 disposed at the non-drive end. The second force-applying part 1326 is further provided with a left pressing surface 1327L, and the first force-applying part 1321 is further provided with a right pressing surface 1327R. That is, along the left-right direction, the second force-applying part 1326 and the drive head 18 are disposed at the same end of the developing cartridge 11. The left pressing surface 1327L is used to contact the second abutment part 1212 disposed at the drive end (e.g., ...). Figure 22BAs shown, the right extrusion surface 1327R abuts against the first abutment portion 1211 provided at the non-drive end, thereby allowing the developing roller 15 and the photosensitive drum 14 to separate from each other simultaneously at both the drive end and the non-drive end.

[0154] Specifically, the structure of the second force-applying part 1326 / left extrusion surface 1327L in this embodiment is basically the same as the structure of the extrusion surface in embodiment 6. The difference is that the second force-applying part 1326 / left extrusion surface 1327L in this embodiment is provided at the drive end, and the distance between the left extrusion surface 1327L and the rotation axis L of the developing roller 15 gradually increases in the front-back direction along the direction from left to right. The first force-applying part 1321 in this embodiment is a protrusion protruding from the first housing 111 or the bracket 1113. The right extrusion surface 1327R provided on the first force-applying part 1321 is formed such that the distance between the right extrusion surface 1327R and the rotation axis L of the developing roller 15 gradually increases in the front-back direction along the direction from left to right.

[0155] Force receiving part 1311 is provided at the non-driving end. The right force applying member 1 moves forward and squeezes the force receiving part 1311. The developing cartridge 11 begins to move to the left. The right squeezing surface 1327R abuts against the first contact part 1211 provided at the non-driving end (e.g., ...). Figure 22A As shown, the left extrusion surface 1327L abuts against the second abutment portion 1212 (as shown) located at the drive end. Figure 22B As shown, the elastic element 93 in the imaging device is overcome, or in other words, the elastic element 93 accumulates elastic force. Through the reaction force applied by the drum box 12 to the left extrusion surface 1327L and the right extrusion surface 1327R respectively, the developing box 11 moves backward, and the developing roller 15 and the photosensitive drum 14 separate from each other.

[0156] When the right force-applying member 1 no longer applies separation force, the elastic member 93 releases its elastic force, pushing the developing cartridge 11 to the right. At the same time, the pushing member 123 pushes the developing cartridge 100 forward to reset it.

[0157] Preferably, when the developing cartridge 11 is installed onto the drum cartridge 12, the left pressing surface 1327L in this embodiment is opposite to the second lower surface 142f. In this way, the upward movement tendency of the driving end of the developing cartridge 11 can be stopped. That is, the second abutting part 1212 in this embodiment can also be provided on the second support member 142. Specifically, the second abutting part 1212 is an edge / surface adjacent to the second lower surface 142f. The second abutting part 1212 can be provided on one of the first cartridge body 111 and the bracket 1113.

[0158] Preferably, when the developing cartridge 11 is installed into the drum cartridge 12, gaps are formed between the left extrusion surface 1327L and the second abutment portion 1212, and between the right extrusion surface 1327R and the first abutment portion 1211, to ensure that the developing roller 15 and the photosensitive drum 14 maintain stable contact.

[0159] As can be seen from the above description, the separation member 13 in this embodiment does not need to be equipped with a reset member / reset mechanism. Instead, the elastic member 93 in the imaging device used for the push driving force output member 92 is used to force the developing cartridge 11 to reset. Thus, the structure of the separation member 13 becomes simpler. It can be understood that in the above embodiments 6, 7, and 8, the elastic force of the third reset member 135 should be greater than the elastic force of the elastic member 93 in the imaging device to ensure that the developing cartridge 11 can be reset smoothly.

[0160] Example 10

[0161] Based on the structure described in the above embodiments, this embodiment further optimizes the structure of the developing cartridge 11 to ensure that the developing roller 15 and the photosensitive drum 14 are completely separated.

[0162] like Figure 30 As shown, the developing cartridge 11 also includes a range extender 1114, which is used to abut against an active part other than the developing cartridge 11, so that the developing roller 15 and the photosensitive drum 14 are completely separated. The active part may be disposed on the drum box 12 or disposed in the imaging device.

[0163] As described above, the separation member 13 can be disposed on either the driving end or the non-driving end. In the longitudinal direction, the range extender 1114 is disposed on the end opposite to the end where the separation member 13 is located. That is, the range extender 1114 is not disposed on the same side as the separation member 13. When the separation member 13 is disposed on the driving end, the range extender 1114 is disposed on the non-driving end. When the separation member 13 is disposed on the non-driving end, the range extender 1114 is disposed on the driving end.

[0164] Continue as Figure 30 As shown, the developing roller 15 includes a developing layer 151 and a developing roller shaft 152. The developing roller shaft 152 is rotatably supported by a bracket 1113. In the longitudinal direction, the developing roller shaft 152 protrudes from the developing layer 151, and the dimension of the developing roller shaft 152 between the driving end and the non-driving end is greater than the dimension of the developing layer 151 between the driving end and the non-driving end. The developing layer 151 has a left end 151a located at the driving end and a right end 151b located at the non-driving end. The area (carrying area) S between the left end 151a and the right end 151b is used to carry developer. That is, a carrying area S for carrying developer is formed between the two ends of the developing layer 151. When the developing roller 15 and the photosensitive drum 14 approach each other, the developing layer 151 and the photosensitive drum 14 come into contact.

[0165] Along the longitudinal direction, at least a portion of the range extender 1114 is located outside the bearing area S. Specifically, at least a portion of the range extender 1114 is located to the left of the left end 151a, or to the right of the right end 151b.

[0166] In a specific implementation, at least a portion of the contact position (contact point, contact surface, or contact line) between the range extender 1114 and the actuating part is located outside the bearing area S. In this case, at least a portion of the contact position is located to the left of the left end 151a, or in other words, at least a portion of the contact position is located to the right of the right end 151b.

[0167] Figure 31 An embodiment is given in which the active part is located in the drum housing 12, the range extender 1114 is located on the bracket 1113, and the active part is the first intermediate part 141g. In some embodiments, the range extender 1114 may also be located on the first housing 111.

[0168] When the developing cartridge 11 is installed into the drum cartridge 12, the extension member 1114 is opposite to the first intermediate portion 141g, and the separating member 13, before receiving the force F, ... Figure 32A As shown, the developing roller 15 and the photosensitive drum 14 are kept in contact / close to each other. The developing roller 15 rotates around the rotation axis L, and the photosensitive drum 14 rotates around the rotation axis X. The right end 151b contacts the photosensitive drum 14 at the contact point P1.

[0169] It should be noted that the range extender 1114 and the first intermediate part 141g are opposite each other in the front-back direction. The range extender 1114 faces the first intermediate part 141g. The two can be in a state of maintaining a gap or in a state of just contact without generating a squeezing force.

[0170] In existing products, when the separation member 13 receives force F, the developing roller 15 rotates with the developing cartridge 11 around point P1 relative to the photosensitive drum 14 in the direction shown by r. At the drive end, the developing roller 15 and the photosensitive drum 14 are separated from each other, or in other words, the left end 151a is separated from the photosensitive drum 14, but at least the right end 151b may still remain in contact with the photosensitive drum 14. When the developing cartridge 11 is in a state of long-term non-use, at least at the location of the right end 151b, the developing layer 151 may be deformed, or the photosensitive drum 4 may be contaminated.

[0171] like Figure 32BAs shown, in the developing cartridge 11 of this embodiment, at least a portion of the range extender 1114 is located to the right of the right end 151b along the longitudinal direction, or in other words, at least a portion of the range extender 1114 is further away from the left end 151a than the right end 151b. When the separating member 13 receives force F, at the non-driving end, the range extender 1114 and the first intermediate portion 141g abut at point P2 (one embodiment of the contact position, when the range extender 1114 and the first intermediate portion 141g form a surface bond or a line bond, the midpoint of the surface or the line is taken), and point P1 disengages from the photosensitive drum 14.

[0172] To facilitate understanding of this plan, Figure 33 The diagram illustrates the angle formed between the developing roller 15 and the photosensitive drum 14 during the separation process of the developing roller 15 and the photosensitive drum 14. The developing roller 15's rotation axis L moves relative to the photosensitive drum 14's rotation axis X. In the diagram, L1 represents the rotation axis of the developing roller in the conventional developing cartridge, and L2 represents the rotation axis of the developing roller in the developing cartridge of this embodiment.

[0173] When the separation component 13 receives force F, in the existing developing cartridge, the developing roller 15 / developing cartridge 11 rotates around point P1. In the separated state, the included angle between the rotation axis L1 of the developing roller 15 and the rotation axis X of the photosensitive drum 14 is a1. In the developing cartridge involved in this embodiment, the developing roller 15 / developing cartridge 11 rotates around point P2. In the separated state, the included angle between the rotation axis L2 of the developing roller 15 and the rotation axis X of the photosensitive drum 14 is a2, where a2 > a1.

[0174] Therefore, in one embodiment, point P2 is located to the right of point P1, or in other words, point P2 is farther away from the driving end (the end where the separating member 13 is located, or the end of the separating member 13 used to receive force F) than point P1; conversely, when the separating member 13 is located at the non-driving end, or when the separating member 13 receives force F at the non-driving end, point P2 will be located to the left of point P1, or in other words, point P2 is farther away from the non-driving end than point P1.

[0175] In one embodiment, points P1 and P2 are both located in a plane that passes through the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14 simultaneously. In this way, the motion trajectory of the developing roller 15 and the photosensitive drum 14 when they separate will be more stable.

[0176] In one embodiment, in the plane, along a direction perpendicular to the longitudinal direction, point P2 is farther away from the rotation axis X of the photosensitive drum 14 than point P1, or in other words, point P2 is farther away from the surface of the photosensitive drum 14 than point P1.

[0177] Example 11

[0178] Based on the inventive concept of Embodiment 10, such as Figure 34 As shown, in this embodiment, the range extender 1114 is still mounted on the bracket 1113. In the longitudinal direction, the range extender 1114 is still located outside the bearing area S. However, when the developing cartridge 11 is installed on the drum cartridge 12, the range extender 1114 is directly opposite the photosensitive drum 14. Therefore, the functional part in this embodiment is the photosensitive drum 14.

[0179] The aforementioned range extender 1114 directly facing the photosensitive drum 14 means that in the front-to-back direction, the range extender 1114 faces the photosensitive drum 14, and the two can be in a state of maintaining a gap or in a state of just contact without generating a squeezing force.

[0180] In some implementations, the range extender 1114 may also be disposed on the first housing 111.

[0181] When the separating member 13 receives force F, the developing roller 15 will rotate relative to the photosensitive drum 14 along with the developing cartridge 11. The extension member 1114 will contact the photosensitive drum 14 at point P2. Similarly, in the longitudinal direction, since point P2 is located to the right of point P1, or in other words, point P2 is farther away from the driving end (the end where the separating member 13 is located, or the end of the separating member 13 used to receive force F) than point P1; conversely, when the separating member 13 is located at the non-driving end, or when the separating member 13 receives force F at the non-driving end, point P2 will be located to the left of point P1, or in other words, point P2 is farther away from the non-driving end than point P1. In this embodiment, the developing roller 15 will be completely separated from the photosensitive drum 14.

[0182] In one embodiment, points P1 and P2 are both located in a plane that passes through the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14 simultaneously. In this way, the motion trajectory of the developing roller 15 and the photosensitive drum 14 when they separate will be more stable.

[0183] In one embodiment, both the developing layer 151 and the range extender 1114 are in contact with the surface of the photosensitive drum 14, so that in the plane, along the direction perpendicular to the longitudinal direction, the distance of point P2 from the rotation axis X is equal to the distance of point P1 from the rotation axis X.

[0184] In one embodiment, the developing layer 151 is in contact with the surface of the photosensitive drum 14, but the range extender 1114 is not in contact with the photosensitive drum 14 and the two are spaced apart from each other, which helps to prevent the surface of the photosensitive drum 14 from being worn.

[0185] Example 12

[0186] Based on the inventive concept of Embodiment 10, such as Figure 35As shown, in this embodiment, the range extender 1114 is disposed on the bracket 1113 or the first housing 111. When the developing cartridge 11 is installed on the drum housing 12, the range extender 1114 is opposite to the second housing 121. Therefore, in this embodiment, the function part 126 is a part of the second housing 121 itself.

[0187] The term "range extender 1114 and second housing 121 are opposite" means that in the front-back direction, range extender 1114 faces second housing 121, and the two can be in a state of maintaining a gap or in a state of just contact without generating a squeezing force.

[0188] Along the longitudinal direction, the range extender 1114 is still located outside the bearing area S. When the separation member 13 receives force F, the point P2 where the range extender 1114 abuts against the action part 126 is located to the right of point P1, or in other words, point P2 is farther away from the driving end (the end where the separation member 13 is located, or the end of the separation member 13 used to receive force F) than point P1. Conversely, when the separation member 13 is located at the non-driving end, or when the separation member 13 receives force F at the non-driving end, point P2 will be located to the left of point P1, or in other words, point P2 is farther away from the non-driving end than point P1. In this embodiment, the developing roller 15 will be completely separated from the photosensitive drum 14.

[0189] In one embodiment, points P1 and P2 are both located in a plane that passes through the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14 simultaneously. In this way, the motion trajectory of the developing roller 15 and the photosensitive drum 14 when they separate will be more stable.

[0190] In one embodiment, in the plane, along a direction perpendicular to the longitudinal direction, point P2 is farther away from the rotation axis X of the photosensitive drum 14 than point P1, or in other words, point P2 is farther away from the surface of the photosensitive drum 14 than point P1.

[0191] In summary, in the plane, along the direction perpendicular to the longitudinal direction, point P2 is no closer to the rotation axis X of the photosensitive drum 14 than point P1.

[0192] As described above, in the developing cartridges of Embodiments 10, 11, and 12, by providing the range extender 1114, when the separation member 13 receives the force F, the left end 151a and the right end 151b in the longitudinal direction are both disengaged from the photosensitive drum 14. The distance at which the developing roller 15 and the photosensitive drum 14 disengage from each other at one end (drive end) of the developing cartridge is different from the distance at the other end (non-drive end) of the developing cartridge. The distance between the developing roller 15 and the photosensitive drum 14 disengages from each other can gradually decrease from left to right or gradually increase from left to right. Even if the developing cartridge 11 is in a state of long-term non-use, the developing layer 151 will not contact the photosensitive drum 14, and neither the developing roller 15 nor the photosensitive drum 14 will be damaged or contaminated.

[0193] Example 13

[0194] This embodiment provides another separable component 13, such as Figure 36 , Figure 37 , Figure 38A and Figure 38B As shown, the separating component 13 includes a main body 1310, a force receiving member 131, and a force applying member 1326. The main body 1310 is fixedly disposed relative to the first housing 111. The force receiving member 131 is connected to the main body 1310 and is used to receive the force F applied by the force applying member 1 of the electrophotographic imaging device. The force applying member 1326 is also connected to the main body 1310. Through the force applying member 1326, the force F is applied to the force receiving part outside the developing cartridge 11, and then the force receiving part reacts to the force applying member 1326, causing the first housing 111 to move relative to the drum cassette 12 / second housing 121 / photosensitive drum 14. The force receiving part can be, for example, the first abutment part 1211 and the second abutment part 1212 (e.g., ...). Figure 5 (as shown) at least one of them, or it can be another component disposed in the drum box 12 or a component in the electrophotographic imaging device PM.

[0195] This embodiment will focus on describing a component located in an electrophotographic imaging device PM as the force-bearing part. First, refer to... Figure 38A and Figure 38B The electrophotographic imaging device PM is also provided with a laser PM1 for emitting a laser beam carrying imaging information onto the surface of the photosensitive drum 14. When the developing cartridge 11 / processing cartridge 100 is installed in a predetermined position of the electrophotographic imaging device PM, the laser PM1 is opposite to the photosensitive drum 14. In this way, the laser PM1 can emit a laser beam onto the surface of the photosensitive drum 14, so that an electrostatic latent image is formed on the surface of the photosensitive drum 14. The force-bearing part is the laser PM1.

[0196] The force receiving member 131 is provided with a force receiving part 1311 for receiving force F. The force applying part 1326 can be integrally formed with the force receiving part 131 or separately formed, as long as the force applying part 1326 can move in response to the movement of the force receiving part 1311 relative to the drum box 12 / second box 121 / photosensitive drum 14.

[0197] In some embodiments, the force receiving part 1311 is a plane disposed on the force receiving member 131, and the plane is configured such that when the force applying member 1 begins to apply force F to the separating member 13, the plane is perpendicular to the direction of force F, which can ensure that force F is applied to the plane more effectively, thereby improving the separation efficiency.

[0198] In some embodiments, the laser PM1 is configured to move with the movement of the door cover; for example, when the door cover gradually closes, the laser PM1 moves towards the photosensitive drum 14, and when the door cover gradually opens, the laser PM1 moves away from the photosensitive drum 14; the force-applying member 1 has, for example, Figure 37 The first position A, the second position B, and the third position C are shown. In the first position A, the door cover is open. In the second position B, the door cover is closed and the developing roller 15 and the photosensitive drum 14 are close to each other. In the third position C, the door cover is closed and the force-applying member 1 is about to apply force F to the separating member 13.

[0199] The main body 1310, force receiving member 131, and force applying member 1326 can be formed integrally or separately, but the force applying member 1326 always protrudes from the main body 1310, such as... Figure 37 As shown, when viewed along the longitudinal direction, the force-applying part 1326 protrudes from the first box body 111.

[0200] In some embodiments, the force-applying part 1326 has an arc-shaped force-applying surface 1329, which helps protect the force-receiving part and prevents it from being damaged due to excessive force concentration; the force-applying part 1326 and the force-receiving part will form a line contact, and when viewed along the longitudinal direction, the position where the force-applying part 1326 / force-applying surface 1329 abuts against the force-receiving part will form an abutment point D, such as Figure 38A As shown, when the developing cartridge 11 / processing cartridge 100 is installed in the predetermined position of the imaging device, the force-applying part 1326 / force-applying surface 1329 contacts the laser PM1, which is the force-receiving part, so that the force F applied by the force-applying member 1 can be transmitted to the laser PM1 more efficiently.

[0201] In some embodiments, when the developing cartridge 11 / processing cartridge 100 is installed in a predetermined position of the imaging device, the force-applying part 1326 / force-applying surface 1329 and the laser PM1, which is the force-receiving part, may not be in contact, and the gap between them may be in the range of 0.1mm-10mm. In this way, as the laser PM1 moves toward the photosensitive drum 14, interference between the laser PM1 and the force-applying part 1326 can be prevented.

[0202] As described above, when the force-applying member 1 applies force F to the separation member 13, the force-applying part 1326 transmits force F to the laser PM1. Subsequently, the laser PM1 applies a reaction force to the force-applying part 1326. This reaction force forces the separation member 13 to move the first housing 111 relative to the drum housing 12 / second housing 121 / photosensitive drum 14, thereby causing the developing roller 15 and the photosensitive drum 14 to change from a state of being close to each other to a state of being separated from each other.

[0203] Specifically, in some embodiments, under the action of the reaction force, the first box 111 will move around the contact point D along... Figure 38B The roller rotates in the direction shown by r4, that is, the part behind the contact point D moves upward and the part in front of the contact point D moves downward, the developing roller 15 and the photosensitive drum 14 separate from each other, and a second gap g is formed between them.

[0204] In some embodiments, under the action of the reaction force, in the first mounting space 141e (e.g. Figure 22A and Figure 22B Under the guidance of the first housing 111 (as shown), the developing roller 15 and the photosensitive drum 14 move backward as a whole, and the developing roller 15 and the photosensitive drum 14 separate from each other, forming a second gap g between them.

[0205] Thus, under the action of the reaction force, the first cartridge 111 is guided by the guide part outside the developing cartridge, and can rotate or slide, but ultimately can separate the developing roller 15 and the photosensitive drum 14. The guide part can be, for example, the first mounting space 141e mentioned above, or a guide space set in the imaging device. Specifically, the specific shape of the guide part should not be limited, and it can be either straight or curved.

[0206] In some embodiments, the force-applying surface 1329 extends in the longitudinal direction, thereby increasing the contact area between the force-applying surface 1329 and the force-receiving part and improving the separation efficiency.

[0207] In some embodiments, a first auxiliary line m1 is defined as a straight line passing through the contact point D and parallel to the direction of force F. A second auxiliary line m2 and a third auxiliary line m3, parallel to the first auxiliary line m1, are drawn along the front and rear directions, respectively passing through the front and rear end points of the developing cartridge 11. A first region Q1 is formed between the first auxiliary line m1 and the second auxiliary line m2, and a second region Q2 is formed between the first auxiliary line m1 and the third auxiliary line m3. The developing roller 15 is located in the first region Q1, and the force receiving part 1311 is located in the second region Q2. Along a direction perpendicular to the direction of force F (e.g., the front and rear direction), the length of the first region Q1 is n1, and the length of the second region Q2 is n2.

[0208] In some implementations, n2 > n1, so that the imaging device only needs to apply a small force F to change the developing roller 15 and the photosensitive drum 14 from a state of being close to each other to a state of being separated from each other; for example Figure 38A As shown, along the front-to-back direction, the force receiving part 1311, the force applying part 1326 / force applying surface 1329 / contact point D, and the developing roller are arranged sequentially from back to front. Obviously, the closer the force receiving part 1311 is to the third auxiliary line m3, the higher the separation efficiency of the developing roller 12 and the photosensitive drum 22.

[0209] In some embodiments, the separation component 13, the first box 111, and the support 113 can be formed as a single unit, any two of them can be formed as a single unit, or they can be formed separately as three independent components.

[0210] As described above, when the developing cartridge 11 is installed into the drum cartridge 12, the pushing member in the drum cartridge 12 applies a pushing force to the pushing portion in the developing cartridge 11, allowing the developing roller 15 and the photosensitive drum 14 to remain close to each other. Therefore, under the action of the reaction force, when at least a portion of the first cartridge 111 moves backward, causing the developing roller 15 and the photosensitive drum 14 to change from a close-to-each-other state to a separated state, the drum cartridge 12 may also move along with the developing cartridge 11. This could potentially cause the photosensitive drum 14 to deviate from the recording medium. For this reason, in some embodiments, the developing cartridge 11 further includes a drum cartridge limiting portion 136 for restricting the movement of the drum cartridge 12 along with the developing cartridge 11. The drum cartridge limiting portion 136 is movable along with the movement of the first cartridge 111. Figure 38A and Figure 38B As shown, under the action of the reaction force, when the first cartridge 111 rotates or slides, causing the developing roller 15 and the photosensitive drum 14 to change from a state of being close to each other to a state of being separated from each other, the drum box limiting part 136 abuts against the drum box 12, thereby restricting the movement of the drum box 12 following the developing cartridge 11.

[0211] In some embodiments, a power transmission element 144 is also provided at the longitudinal end of the photosensitive drum 14. The power transmission element 144 receives power from the imaging device through electrical contact with the imaging device and supplies it to the photosensitive drum. When the drum box 12 is restricted by the drum box limiting part 136, the power transmission element 144 will be able to maintain stable electrical contact with the imaging device.

[0212] In some embodiments, at least one of at least a portion of the developing roller 15 and at least a portion of the photosensitive drum 14 overlaps with the force-applying portion 1326 in the front-back direction, thereby controlling the size of the developing cartridge 11 in the direction intersecting the front-back direction. This design is beneficial for miniaturizing the developing cartridge 11 / processing cartridge 100.

[0213] In some embodiments, the separating member 13 may be disposed at least on one of the driving end and the non-driving end. When the separating member 13 is disposed only on one of the driving end and the non-driving end, under the action of force F, the developing roller 15 and the photosensitive drum 14 may present a separation as follows: Figure 32B As shown, under sufficiently large force F, the developing roller 15 and the photosensitive drum 14 will completely separate in the longitudinal direction.

[0214] In some embodiments, the force-bearing part can also be other components of the imaging device, such as the top cover or side cover of the imaging device. The force-bearing part can also be part of the drum box 12, such as an extension protrusion extending from the second box body 121, and the force-applying part 1326 can abut against the extension protrusion.

[0215] During the movement of the developing cartridge 11 relative to the drum cartridge 12, causing the developing roller 15 and the photosensitive drum 14 to change from a state of close proximity to a state of separation, the chip 32 may move towards the contact pin 403, further compressing the contact pin 403. Over time, not only may the contact pin 403 undergo irreversible deformation, but the force exerted on the chip 32 by the contact pin 403 will also increase, resulting in unstable electrical contact between the chip 32 and the contact pin 403, and damage to the chip 32. When an elastic element 33 is provided between the chip 32 and the chip holder 31, not only can the chip 32 and the contact pin 403 be kept in an elastic electrical contact state, but also during the movement of the first cartridge 111 relative to the second cartridge 121, the chip 32 can move away from the contact pin 403, thereby reducing the compressive force exerted on the contact pin 403 by the chip 32. Conversely, the force exerted on the chip 32 can also be reduced, thereby extending the service life of the contact pin 403 and the chip 32.

[0216] Example 14

[0217] like Figure 39As shown, the developing cartridge 11 involved in this embodiment is still provided with a separation mechanism 13. Similarly, the separation mechanism 13 can be provided at least one of the driving end and the non-driving end.

[0218] As described above, the developing cartridge 11 and the drum cartridge 12 are compatible. The drum cartridge 12 is provided with a cartridge-side force-applying member 124. The specific structure of the cartridge-side force-applying member 124 is as described above and will not be repeated here. When the force-applying member 124 rotates around... Figure 40A When the rotation axis L4 rotates in the direction shown by r3, the force-applying member 1 abuts against the first part 124a, and force F is applied to the first part 124a. The force-applying member 124 on the box side rotates around... Figure 40A The rotation axis L3 rotates along the direction shown by r2, and the second part 124b pushes the separation member 13, thereby causing the first housing 111 to move away from the photosensitive drum 14. Both the rotation axis L3 and the rotation axis L4 are parallel to the left-right direction. Figure 40B As shown, a second gap g is formed between the developing roller 15 and the photosensitive drum 14.

[0219] Continue as Figure 40A As shown, when viewed along the longitudinal direction, the second part 124b is formed as a polygonal body, including a first side 124b1, a second side 124b2, and a third side 124b3. The two ends of the second side 124b2 are connected to the first side 124b1 and the third side 124b3, respectively. The first side 124b1 and the second side 124b2 intersect at the first intersection point D1, and the second side 124b2 and the third side 124b3 intersect at the second intersection point D2. Along the rotation direction r2 of the box-side force-applying member 124, the first intersection point D1 is located downstream of the second intersection point D2 / second side 124b2.

[0220] In this embodiment, the separating member 13 includes a force receiving member 131 having a force receiving portion 1311, wherein the force receiving portion 1311 is configured as a plane that at least partially faces forward, such as... Figure 40A As shown, when the developing cartridge 11 is developing in the imaging device, the developing roller 15 and the photosensitive drum 14 are close to each other, and the plane of the force receiving part 1311 is opposite to the first intersection point D1.

[0221] In some embodiments, when the developing cartridge 11 is being developed in the imaging device, the force receiving part 1311 may also be opposite to the second side 124b2.

[0222] like Figure 40BAs shown, when the developing cartridge 11 does not need to be developed in the imaging device, the force-applying member 1 rotates around the rotation axis L4 in the direction shown by r3, thereby driving the cartridge-side force-applying member 124 / second part 124b to rotate around the rotation axis L3 in the direction shown by r2, until the force receiving part 1311 is opposite to the second intersection point D2. As the cartridge-side force-applying member 124 continues to rotate, the second part 124b pushes the force receiving member 131, causing the first cartridge body 111 to drive the developing roller 15 to move away from the photosensitive drum 14. The state in which the developing roller 15 and the photosensitive drum 14 are close to each other changes to a state in which they are separated, and a second gap g is formed between them.

[0223] As described above, by setting the force receiving part 1311 to be at least partially facing forward, during the rotation of the second part 124b in the direction indicated by r2, the force receiving part 1311 changes from being opposite to the first intersection point D1 to being opposite to the second intersection point D2, without having to completely cross the second intersection point D2, so that the force receiving part 1311 is opposite to the third side 124b3. This helps to reduce the force F required to be applied to the force applying member 1. As a result, the developing roller 15 and the photosensitive drum 14 can more smoothly change from a state of being close to each other to a state of being separated from each other. That is, when the developing roller 15 and the photosensitive drum 14 are in a state of being close to each other and a state of being separated from each other, respectively, the force receiving part 1311 is opposite to both ends of the same surface of the cartridge-side force applying member 124.

[0224] In some embodiments, when the developing roller 15 and the photosensitive drum 14 are in a state of being close to each other and a state of being separated from each other, the force receiving part 1311 may not be opposite to the first intersection point D1 and the second intersection point D2, but rather opposite to two different positions of the second side 124b2, which are located between the first intersection point D1 and the second intersection point D2. Thus, the force receiving part 1311 can also be regarded as being opposite to the two ends of the same surface of the cartridge-side force-applying member 124.

[0225] It should be noted that when the developing roller 15 and the photosensitive drum 14 are close to each other, the force receiving part 1311 facing the first intersection point D1 and the force receiving part 1311 facing the second side 124b2 should be understood as either being in contact with each other or being spaced apart from each other. When the developing roller 15 and the photosensitive drum 14 are separated from each other, the force receiving part 1311 facing the second intersection point D2 and the force receiving part 1311 facing the second side 124b2 should be understood as either being in contact with the second intersection point D2 or the second side 124b2. In some embodiments, such as Figure 39As shown, the developing cartridge 11 also includes an end cap (right end cap) 110 disposed at the right end (non-driving end) of the first cartridge body 111. The end cap 110 is fixedly disposed relative to the first cartridge body 111, and the separating member 13 is also fixedly disposed relative to the first cartridge body 111. For example, the end cap 110 is fixedly installed on the first cartridge body 111, and the separating member 13 is fixedly installed on at least one of the first cartridge body 111 and the end cap 110.

[0226] In some embodiments, the developing cartridge 11 further includes a powder filling port cover 1119a for sealing the powder filling port 111b, which allows developer to be added to the first cartridge 111; the powder filling port cover 1119a includes a cover body 1119a1 and at least one of a locking part 101 and a forced push part (e.g., a right forced push part 1115R) disposed on the cover body 1119a1, wherein the locking part 101 is used to cooperate with a locking member in the drum cartridge 12 such that the developing cartridge 11 is locked in the drum cartridge 12, and the right forced push part 1115R is forced by the right forced push member 123R such that the developing roller 15 and the photosensitive drum 14 are kept in a close proximity to each other.

[0227] In some embodiments, to facilitate easier installation of the developing cartridge 11 into or removal of the drum cartridge 12, the drum cartridge 12 is further provided with an auxiliary mounting component (not shown), such as a rotating wheel. Correspondingly, the developing cartridge 11 is provided with a mating mounting component for engaging with the auxiliary mounting component, such as... Figure 41 As shown, the mating mounting component includes at least one of a left auxiliary component 1117e disposed on the end cover 1117 and a right auxiliary component 1101 disposed on the end cover 110. During the installation and removal of the developing cartridge 11 in the drum housing 12, both the left auxiliary component 1117e and the right auxiliary component 1101 mate with the auxiliary mounting component. Specifically, the left auxiliary component 1117e and the right auxiliary component 1101 are configured as protrusions or ribs. Through the mating of the left auxiliary component 1117e and the right auxiliary component 1101 with the rotating wheel, the rolling action of the rotating wheel makes it easier to install the developing cartridge 11 into the drum housing 12, or to remove the developing cartridge 11 from the drum housing 12.

[0228] In some embodiments, at least a portion of the force receiving portion 1311 faces forward, and preferably, the force receiving portion 1311 is parallel to the longitudinal direction.

[0229] In some embodiments, the direction in which the force receiving part 1311 faces is not parallel to the line L0 connecting the center of the developing roller 15 and the center of the photosensitive drum 14, as long as the force receiving part 1311 can receive the force F.

[0230] In some embodiments, the force receiving section 1311 is oriented in a direction perpendicular to the line L0 connecting the center of the developing roller 15 and the center of the photosensitive drum 14, so that the force F required by the force receiving section 1311 is minimized.

[0231] Example 15

[0232] Based on Examples 6 and 9, this example further optimizes the structure of the separation component 13.

[0233] First refer to Figure 43A As shown, the force-applying member 1 is configured as a cylinder. The end of the force-applying member 1 used to apply force F to the separating member 13 has a corner portion 1a. The end face 1b of the force-applying member is arranged adjacent to the corner portion 1a. On the one hand, during the process of the developing roller 15 and the photosensitive drum 14 separating and approaching each other multiple times, the separating member 13 will continuously rub against the corner portion 1a, which may lead to wear of the separating member 13, resulting in a reduction in the force F applied by the force-applying member 1 to the separating member 13. Finally, the developing roller 15 and the photosensitive drum 14 fail to separate from each other. On the other hand, in the existing solution, the separating member 13 abuts against the force receiving portion 1311 through the corner portion 1a to keep the developing roller 15 and the photosensitive drum 14 separated from each other. However, after the corner portion 1a abuts against the force receiving portion 1311 for a long time, scratches may appear on the force receiving portion 1311, which may result in the separation of the developing roller 15 and the photosensitive drum 14 being insignificant after the force-applying member 1 applies a separation force to the separating member 13.

[0234] like Figure 42 As shown, the force receiving part 1311 in this embodiment includes a first surface 1311a, a second surface 1311b, and a third surface 1311c. The third surface 1311c is located between the first surface 1311a and the second surface 1311b. In the longitudinal direction, the second surface 1311b is at least a portion further away from the first housing 111 than the first surface 1311a. When the developing roller 15 and the photosensitive drum 14 are close to each other, the force applying member 1 is opposite to the first surface 1311a in the longitudinal direction. When the developing roller 15 and the photosensitive drum 14 are separated from each other, the force applying member 1 is opposite to the second surface 1311b in the longitudinal direction, and the end face 1b of the force applying member abuts against the second surface 1311b.

[0235] In some embodiments, the third surface 1311c is configured to be non-planar, thereby enabling the force-applying member 1 to more smoothly transition from a state opposite to the first surface 1311a to a state opposite to the second surface 1311b.

[0236] In some embodiments, the first surface 1311a is configured as a curved surface. The distances between the two ends of the first surface 1311a in the lateral direction (the front end and the rear end, which are spaced apart from each other) and the first housing 111 in the longitudinal direction are different. Specifically, the distance between the front end of the first surface 1311a and the first housing 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first housing 111 in the longitudinal direction. The front end and the rear end are spaced apart from each other. During the process of the developing roller 15 and the photosensitive drum 14 changing from a state of separation to a state of proximity, this design can prevent the first surface 1311a from interfering with the force-applying member 1, and avoid the contact between the force-applying member 1 and the first surface 1311a affecting the normal contact between the developing roller 15 and the photosensitive drum 14 during the imaging process.

[0237] In some implementations, continue as Figure 42 As shown, in the vertical direction, the first surface 1311a has an upper end 1311d and a lower end 1311e spaced apart from each other. In the longitudinal direction, the distance from the upper end 1311d to the first housing 111 is less than the distance from the lower end 1311e to the first housing 111, thereby further preventing the first surface 1311a from interfering with the force-applying member 1 during the process of the developing roller 15 and the photosensitive drum 14 changing from a state of separation to a state of proximity.

[0238] like Figure 43A As shown, when the developing roller 15 and the photosensitive drum 14 are close to each other, the force-applying member 1 / corner portion 1a is opposite to the first surface 1311a. The corner portion 1a can either be spaced apart from the first surface 1311a or in contact with it; as Figure 43B As shown, as the force-applying component 1 moves forward, the corner portion 1a and the first surface 1311a press against each other. Through the force-applying component 1, the first box 111 moves to the left in the longitudinal direction, the right pressing surface 1327R abuts against the first contact portion 1211, the first box 111 moves backward, and the developing roller 15 and the photosensitive drum 14 gradually separate from each other.

[0239] As described above, since the third surface 1311c is set to be non-planar, the force-applying member 1 can smoothly pass over the third surface 1311c from the first surface 1311a, and the developing roller 15 and the photosensitive drum 14 are separated from each other. Finally, the end face 1b of the force-applying member is opposite to the second surface 1311b in the longitudinal direction, and the first housing 111 is held away from the photosensitive drum 14. Accordingly, the developing roller 15 and the photosensitive drum 14 remain in a state of separation from each other.

[0240] In some embodiments, the second surface 1311b is configured as a plane that matches the end surface 1b of the force-applying member, thereby enabling the developing roller 15 and the photosensitive drum 14 to be held more stably in a state of separation from each other, while also preventing scratches from appearing on the force receiving part 1311, so that the developing roller 15 and the photosensitive drum 14 can be held in an effective state of separation from each other.

[0241] In some embodiments, the first surface 1311a may also be configured as an inclined surface that is tilted relative to the longitudinal direction. Preferably, the distance between the front end of the first surface 1311a and the first box 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first box 111 in the longitudinal direction.

Claims

1. A developing cartridge, detachably mounted to a drum housing and capable of being installed together with the drum housing into an electrophotographic imaging device, the developing cartridge comprising a first housing body, the drum housing comprising a second housing body and a photosensitive drum rotatably disposed within the second housing body, characterized in that, The developing cartridge includes: A developing roller is rotatably disposed in the first housing. The developing roller rotates about a rotation axis parallel to the longitudinal direction. The developing roller includes a developing layer, which includes a left end located at the driving end and a right end located at the non-driving end. A carrying area for carrying developer is formed between the left end and the right end. The non-driving end is disposed opposite to the driving end in the longitudinal direction. A separation component, disposed at the drive end of the developing cartridge, is used to receive the separation force applied by the electrophotographic imaging device, thereby separating the developing roller from the photosensitive drum; and An extender is disposed at the non-driving end of the developing cartridge. The extender is used to abut against the working part other than the developing cartridge to completely separate the developing roller and the photosensitive drum. Wherein, at least a portion of the range extender is located outside the bearing area, and in a direction perpendicular to the longitudinal direction, the point where the range extender abuts against the actuating part is further away from the surface of the photosensitive drum than the point where the right end contacts the photosensitive drum.

2. The developing cartridge according to claim 1, characterized in that, The functional part is located on the drum box or in the imaging device.

3. The developing cartridge according to claim 2, characterized in that, The photosensitive drum is configured as the active part.

4. The developing cartridge according to claim 2, characterized in that, The drum box includes a first intermediate portion and a first upper extension and a first lower extension that are spaced apart in the vertical direction. The first intermediate portion connects the first upper extension and the first lower extension. In the front-back direction, the first upper extension and the first lower extension both extend backward from the first intermediate portion. The developing roller is disposed in front of the developing box in the front-back direction. The first intermediate portion is configured as the working part. The front-back direction, the vertical direction and the longitudinal direction are perpendicular to each other.

5. The developing cartridge according to claim 4, characterized in that, The developing cartridge has a right positioning part at the non-driving end, and the right positioning part abuts against the first upper extension.

6. The developing cartridge according to claim 1, characterized in that, When the separating member receives the separating force, and the developing roller rotates around the point where the extender abuts against the actuating part, in the separated state, the angle formed between the rotation axis of the developing roller and the rotation axis of the photosensitive drum is greater than the angle formed between the rotation axis of the developing roller and the rotation axis of the photosensitive drum when the developing roller rotates at the contact point where its right end contacts the photosensitive drum in the separated state.

7. The developing cartridge according to claim 1, characterized in that, The range extender is mounted on the first housing.

8. The developing cartridge according to claim 1, characterized in that, The developing cartridge includes a bracket disposed at the non-drive end, the bracket rotatably supporting the developing roller, and the range extender is disposed on the bracket.

9. The developing cartridge according to claim 1, characterized in that, The separating component is provided with a force receiving surface that is not parallel to the longitudinal direction, and the force receiving surface is set as an inclined surface or a spiral surface.

10. The developing cartridge according to claim 1, characterized in that, In the longitudinal direction, the point where the range extender abuts against the actuating part is farther from the drive end than the point where the right end contacts the photosensitive drum.

Images