Developing cartridge

Abstract

The developing box is detachably arranged on a drum box, the drum box is detachably arranged on an electrophotographic imaging device provided with a force application component, the developing box comprises a first box body and a developing roller, and the drum box comprises a second box body and a photosensitive drum; the developing roller and the photosensitive drum can be switched between a mutual contact state and a mutual separation state, in the mutual contact state, the developing box performs imaging, and in the mutual separation state, the developing box does not perform imaging; the developing cartridge further comprises a separating member, one longitudinal end part of the developing cartridge directly or indirectly receives the force applied by the force applying member through the separating member, and the other longitudinal end part does not directly receive the force applied by the force applying member, so that the developing roller and the photosensitive drum are forced to be converted into a mutually separated state from a mutually contacted state; the developing roller and the photosensitive drum are separated from each other at the two longitudinal ends of the developing box in the longitudinal direction of the developing box, the structure of the developing box can be simplified, and the developing roller and the photosensitive drum can be prevented from being damaged.

Description

[0001] The utility model requires the priority of China's earlier application of the application date for 2023.10.19, the application number for 202322821160.X, the invention name for "developing box", the application date for 2023.11.14, the application number for 202323073548.2, the invention name for "developing box", the application date for 2023.12.5, the application number for 202323314191.2, the invention name for "developing box", the application date for 2024.1.12, the application number for 202420091801.2, the invention name for "developing box", the application date for 2024.7.30, the application number for 202421823793.2, the invention name for "developing box", and the application date for 2024.8.15, the application number for 202421983858.X, the invention name for "developing box", the contents of the earlier application are cross-referenced in the present application. TECHNICAL FIELD

[0002] The utility model relates to the field of electrophotographic imaging, and in particular to a developing box for detachable installation in an electrophotographic imaging device. BACKGROUND

[0003] The existing processing box is of split type, comprising a developing box and a drum box which are detachably connected, the developing box comprises a first box body and a developing roller rotatably arranged in the first box body, the drum box comprises a second box body and a photosensitive drum rotatably arranged in the second box body, the developing roller contacts the photosensitive drum and is used to supply the developer stored in the developing box to the photosensitive drum, after the developer in the developing box is used up, a new developing box is replaced, and when each component in the drum box does not reach its service life, the drum box does not need to be replaced.

[0004] Because the photosensitive drum or the developing roller is easy to be damaged in the case that the developing roller and the photosensitive drum keep contacting without imaging work for a long time, the processing box needs to be provided with a separation component, so that the developing roller and the photosensitive drum keep in a separated state when not performing imaging work, and contact when performing imaging work. When the processing box does not perform imaging work (such as cleaning the photosensitive drum), a force applying component arranged in the electrophotographic imaging device needs to apply a force to the separation component to separate the developing roller and the photosensitive drum, so that the developing roller and the photosensitive drum are completely separated. Utility model content

[0005] The utility model provides a kind of developing box, to continue to develop prior art, when processing box does not perform imaging work, so that developing roller and photosensitive drum can be effectively separated, specific scheme is as follows:

[0006] The developing cartridge is detachably mounted to a drum cartridge which is detachably arranged to an electrophotographic image forming apparatus provided with a force applying member, the developing cartridge comprising a first cartridge body and a developing roller rotatably arranged in the first cartridge body, and the drum cartridge comprising a second cartridge body and a photosensitive drum rotatably arranged in the second cartridge body; the developing roller and the photosensitive drum are capable of being transformed between a mutual contact state in which the developing cartridge is in image forming, and a mutual separation state in which the developing cartridge is not in image forming; the developing cartridge further comprises a separation member arranged such that one longitudinal end of the developing cartridge directly or indirectly receives a force applied by the force applying member, and the other longitudinal end does not directly receive the force applied by the force applying member, thereby forcing the developing roller and the photosensitive drum to be transformed from the mutual contact state to the mutual separation state; along a longitudinal direction of the developing cartridge, at both longitudinal ends of the developing cartridge, the developing roller and the photosensitive drum are mutually separated.

[0007] Specifically, after receiving the force applied by the force applying member, the separation member, by contacting a component in the drum cartridge or the image forming apparatus, causes the first cartridge body to move in a direction away from the photosensitive drum, and the developing roller and the photosensitive drum are mutually separated.

[0008] In some embodiments, the separation member is arranged on the first cartridge body, and the separation member comprises a force receiving member and a force applying portion; the force receiving member is arranged at one longitudinal end of the developing cartridge, for contacting the force applying member and moving relative to the photosensitive drum under the action of the force applying member; the force applying portion comprises a first force applying portion arranged at the one longitudinal end and a second force applying portion arranged at the other longitudinal end, and the first force applying portion and the second force applying portion move relative to the photosensitive drum in response to the movement of the force receiving member.

[0009] In some embodiments, the force applying member further comprises a connecting portion extending between the two longitudinal ends of the developing cartridge, and the first force applying portion and the second force applying portion are respectively arranged at two ends of the connecting portion; the first force applying portion transmits the force received by the force receiving member to the second force applying portion through the connecting portion; the first force applying portion and the second force applying portion are both caused to separate the developing roller and the photosensitive drum from each other by abutting against the second cartridge body.

[0010] In some embodiments, the force receiving member and the connecting portion are integrally arranged, the force receiving member comprises a force receiving portion, a driving portion and a guiding portion, and the connecting portion is provided with a driven portion; the force receiving portion is used for abutting against the force applying member to receive the force, the guiding portion is used for guiding the movement of the force receiving member, and the driving portion is used for driving the driven portion.

[0011] In some embodiments, the force receiving member and the connecting portion are integrally provided, the force receiving member has a force receiving portion for receiving the force applied by the force applying member, the first force applying portion and the force receiving portion are provided at the same end of the developing cartridge and form an included angle therebetween.

[0012] In some embodiments, the force receiving member and the connecting portion are provided separately, and the force receiving member is provided to rotate around an axis parallel to the longitudinal direction of the developing cartridge.

[0013] In some embodiments, when the first force applying portion receives the force applied by the force applying member, the developing cartridge as a whole moves in the longitudinal direction, the developing cartridge moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

[0014] In some embodiments, the drum cartridge further comprises a first support and a second support provided on the second cartridge body, and the photosensitive drum is supported by the first support and the second support.

[0015] When the first force applying portion receives the force applied by the force applying member, the second force applying portion abuts against the first support.

[0016] In some embodiments, the second force applying portion is provided with a pressing surface, the pressing surface is provided such that the distance between the pressing surface and the rotation axis of the developing roller in a direction perpendicular to the rotation axis gradually decreases from the one longitudinal end portion to the other longitudinal end portion.

[0017] In some embodiments, the image forming apparatus further comprises a guide rail for guiding the installation or removal of the developing cartridge, and the second force applying portion moves the developing cartridge relative to the photosensitive drum by abutting against the guide rail, and the developing roller and the photosensitive drum are separated from each other.

[0018] In some embodiments, the separating member comprises a main body portion, a force receiving member, and a force applying portion; the main body portion is fixedly provided relative to the first cartridge body; the force receiving member is connected to the main body portion and is used to receive the force applied by the force applying member; and the force applying portion is connected to the main body portion, the force is applied to a force receiving portion outside the developing cartridge through the force applying portion, and the force receiving portion reacts on the force applying portion, so that the first cartridge body moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

[0019] In some embodiments, the developing cartridge further comprises a range increasing member for abutting against an acting portion outside the developing cartridge, and the range increasing member and the separating member are provided on different sides of the developing cartridge in the longitudinal direction of the developing cartridge.

[0020] In some embodiments, the drum cartridge is provided with a cartridge-side force applying member provided on the second cartridge body, the cartridge-side force applying member has a first portion, a second portion and a third portion, wherein the first portion and the second portion are both connected with the third portion, the first portion is used to receive a force applied by the force applying member so that the cartridge-side force applying member rotates around the third portion in a direction r2, and the second portion is used to transmit the force to the separating member; the second portion is formed as a polygonal body including a first side edge, a second side edge and a third side edge, wherein two ends of the second side edge are connected with the first side edge and the third side edge respectively, the first side edge intersects with the second side edge at a first intersection point D1, the second side edge intersects with the third side edge at a second intersection point D2, and along the rotation direction r2, the first intersection point D1 is located downstream of the second intersection point D2; when the developing roller and the photosensitive drum are in the state of contacting with each other, the portion of the force receiving member used to receive the force is opposite to the first intersection point D1; when the developing roller and the photosensitive drum are in the state of separating from each other, the portion of the force receiving member used to receive the force is opposite to the second intersection point D2.

[0021] In some embodiments, the drum cartridge is provided with a cartridge-side force applying member provided on the second cartridge body, the cartridge-side force applying member has a first portion, a second portion and a third portion, wherein the first portion and the second portion are both connected with the third portion, the first portion is used to receive a force applied by the force applying member so that the cartridge-side force applying member rotates around the third portion in a direction r2, and the second portion is used to transmit the force to the separating member; the second portion is formed as a polygonal body including a first side edge, a second side edge and a third side edge, wherein two ends of the second side edge are connected with the first side edge and the third side edge respectively, the first side edge intersects with the second side edge at a first intersection point D1, the second side edge intersects with the third side edge at a second intersection point D2, and along the rotation direction r2, the first intersection point D1 is located downstream of the second intersection point D2; when the developing roller and the photosensitive drum are in the state of contacting with each other, the portion of the force receiving member used to receive the force is opposite to the first intersection point D1; when the developing roller and the photosensitive drum are in the state of separating from each other, the portion of the force receiving member used to receive the force is opposite to the second intersection point D2.

[0022] In some embodiments, the separating member includes a first surface, a second surface and a third surface, wherein the third surface is located between the first surface and the second surface, and along the longitudinal direction of the developing cartridge, the second surface is farther away from the first cartridge body than at least a portion of the first surface; when the developing roller and the photosensitive drum are in the state of contacting with each other, along the longitudinal direction of the developing cartridge, the force applying member is opposite to the first surface; when the developing roller and the photosensitive drum are in the state of separating from each other, along the longitudinal direction of the developing cartridge, the force applying member is opposite to the second surface, and the end surface of the force applying member abuts against the second surface. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1is a structure schematic view of the process cartridge with the developing cartridge related to the embodiment 1 of the utility model.

[0024] Figure 2 is a lateral structure schematic view of the process cartridge with the developing cartridge related to the embodiment 1 of the utility model.

[0025] Figure 3 is a lateral structure schematic view of the process cartridge with the developing cartridge related to the embodiment 1 of the utility model in another direction.

[0026] Figure 4 is a cross-sectional schematic view of the process cartridge with the developing cartridge related to the embodiment 1 of the utility model.

[0027] Figure 5 is a structure schematic view of the drum cartridge related to the embodiment 1 of the utility model.

[0028] Figure 6 is a disassembled schematic view of the developing cartridge related to the embodiment 1 of the utility model after the separating member and the first cartridge body are separated.

[0029] Figure 7 is a structure schematic view of the process cartridge with the developing cartridge related to the embodiment 2 of the utility model.

[0030] Figure 8 is a lateral structure schematic view of the process cartridge with the developing cartridge related to the embodiment 2 of the utility model.

[0031] Figure 9 is a cross-sectional structure schematic view of the process cartridge with the developing cartridge related to the embodiment 2 of the utility model.

[0032] Figure 10 is a structure schematic view of the connecting rod in the developing cartridge related to the embodiment 2 of the utility model.

[0033] Figure 11 is a state view of the developing cartridge and the drum cartridge related to the embodiment 3 of the utility model after being separated.

[0034] Figure 12A is a perspective view of the developing cartridge related to the embodiment 3 of the utility model.

[0035] Figure 12B is a perspective view of the driving force transmission assembly in the developing cartridge related to the embodiment 3 of the utility model.

[0036] Figure 13 is a side view of the developing cartridge related to the embodiment 3 of the utility model in a longitudinal direction.

[0037] Figure 14 is a side view of the process cartridge with the developing cartridge related to the embodiment 3 of the utility model in a longitudinal direction.

[0038] Figure 15 is a perspective view of the developing cartridge according to the embodiment 4 of the present application.

[0039] Figure 16 is a side view of the developing cartridge according to the embodiment 4 of the present application when the developing roller and the photosensitive drum are separated from each other.

[0040] Figure 17 is an exploded view of the developing cartridge according to the embodiment 4 of the present application when the separating member and the first cartridge body are separated from each other.

[0041] Figure 18 is a state view of the second longitudinal end of the developing cartridge according to the embodiment 4 of the present application when the developing roller and the photosensitive drum are separated from each other.

[0042] Figure 19 is a perspective view of the first longitudinal end of the developing cartridge according to the embodiment 5 of the present application.

[0043] Figure 20 is a state view of the first longitudinal end of the developing cartridge according to the embodiment 5 of the present application when the developing roller and the photosensitive drum are separated from each other.

[0044] Figure 21 is a state view of the second longitudinal end of the developing cartridge according to the embodiment 5 of the present application when the developing roller and the photosensitive drum are separated from each other.

[0045] Figure 22A and Figure 22B is a perspective view of the drum cartridge according to the present application.

[0046] Figure 23 is a perspective view of the second force applying part of the developing cartridge according to the embodiment 6 of the present application.

[0047] Figure 24 is a perspective view of the developing cartridge according to the embodiment 6 of the present application when the developing cartridge is installed to the drum cartridge and the developing cartridge is in the first state.

[0048] Figure 25 is a perspective view of the developing cartridge according to the embodiment 6 of the present application when the developing cartridge is installed to the drum cartridge and the developing cartridge is in the second state.

[0049] Figure 26 is a perspective view of the developing cartridge according to the embodiment 7 of the present application when the developing roller and the photosensitive drum are separated from each other.

[0050] Figure 27A is a perspective view of the second force applying part of the developing cartridge according to the embodiment 8 of the present application when the developing roller and the photosensitive drum are in the state of approaching to each other.

[0051] Figure 27B is a perspective view of the end where the second force applying part is located when the developing roller and the photosensitive drum are in a state of being separated from each other in the developing box related to the embodiment 8 of the utility model.

[0052] Figure 28 is a perspective view of the developing box related to the embodiment 9 of the utility model.

[0053] Figure 29A is a perspective view of the end where the second force applying part is located when the developing roller and the photosensitive drum are in a state of being close to each other in the developing box related to the embodiment 9 of the utility model.

[0054] Figure 29B is a perspective view of the end where the second force applying part is located when the developing roller and the photosensitive drum are in a state of being separated from each other in the developing box related to the embodiment 9 of the utility model.

[0055] Figure 30 is a perspective view of the developing box related to the embodiment 10 of the utility model.

[0056] Figure 31 is a partial perspective view when the developing roller and the photosensitive drum are close to each other after the developing box related to the embodiment 10 of the utility model is installed to the drum box.

[0057] Figure 32A is a plan view when the developing roller and the photosensitive drum are close to each other after the developing box related to the embodiment 10 of the utility model is installed to the drum box.

[0058] Figure 32B is a plan view when the developing roller and the photosensitive drum are separated from each other after the developing box related to the embodiment 10 of the utility model is installed to the drum box.

[0059] Figure 33 is a variation simplification diagram 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 from each other in the developing box related to the embodiment 10 of the utility model.

[0060] Figure 34 is a partial perspective view when the developing roller and the photosensitive drum are separated from each other after the developing box related to the embodiment 11 of the utility model is installed to the drum box.

[0061] Figure 35 is a perspective view when the developing roller and the photosensitive drum are separated from each other after the developing box related to the embodiment 12 of the utility model is installed to the drum box.

[0062] Figure 36 is a perspective view of the developing box related to the embodiment 13 of the utility model.

[0063] Figure 37 is a side view of the developing box related to the embodiment 13 of the utility model observed along the longitudinal direction.

[0064] Figure 38A is a side view of the developing roller in the developing cartridge and the photosensitive drum in the drum cartridge when they are close to each other, viewed in the longitudinal direction.

[0065] Figure 38B is a side view of the developing roller in the developing cartridge and the photosensitive drum in the drum cartridge when they are separated from each other, viewed in the longitudinal direction.

[0066] Figure 39 is a schematic view of the non-driving end of the developing cartridge according to the embodiment 14 of the present application.

[0067] Figure 40A is a side view of the developing roller in the developing cartridge and the photosensitive drum in the drum cartridge when they are close to each other, viewed in the longitudinal direction.

[0068] Figure 40B is a side view of the developing roller in the developing cartridge and the photosensitive drum in the drum cartridge when they are separated from each other, viewed in the longitudinal direction.

[0069] Figure 41 is a perspective view of the developing cartridge according to the embodiment 14 of the present application, viewed from bottom to top.

[0070] Figure 42 is a schematic view of the non-driving end of the developing cartridge according to the embodiment 15 of the present application.

[0071] Figure 43A is a side view of the developing roller in the developing cartridge and the photosensitive drum in the drum cartridge when they are close to each other, viewed in the vertical direction.

[0072] Figure 43B is a side view of the developing roller in the developing cartridge and the photosensitive drum in the drum cartridge when they are separated from each other, viewed in the vertical direction. DETAILED DESCRIPTION

[0073] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein. In other instances, well-known methods have not been described in detail in order to avoid unnecessarily obscuring the present application. Accordingly, other implementations can be derived by combining, sub-combining, modifying, or omitting features of the methods disclosed hereinafter, in conjunction with other current or future technologies, while still staying within the scope of the present application.

[0074] In the present application, the imaging material cartridge comprises a process cartridge and an ink cartridge, which will be described in detail in the embodiments.

[0075] Embodiment 1

[0076] As Figures 1-4As 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.

[0077] like Figure 5 As 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.

[0078] like Figure 6As shown, the separating member 13 is arranged on the first cartridge body 111, preferably on the upper side of the first cartridge body 111, to facilitate installation of the separating member 13. The separating member 13 comprises a force receiving member 131, a connecting rod 132 extending from the first longitudinal end to the second longitudinal end of the developing cartridge, and a force applying portion, the force receiving member 131 being movable in response to a force from the electrophotographic image forming apparatus, the force applying portion being movable in response to movement of the force receiving member 131 / force receiving portion 1311 relative to the drum cartridge 12 / second cartridge body 121 / photoreceptor drum 14, the developing roller 15 being separated from the photoreceptor drum 14, the connecting rod 132 being directly or indirectly driven by the force applying portion.

[0079] In particular, the separating member 13 comprises the force receiving member 131 arranged at the first longitudinal end of the developing cartridge and the connecting rod 132 connected to the force receiving member 131 via a gear rack mechanism, the connecting rod 132 being arranged in the recess 1111 of the first cartridge body 111 and extending in the longitudinal direction of the developing cartridge 11 from the first longitudinal end to the second longitudinal end of the developing cartridge 11. It is understood that the connecting rod 132 can also be mounted on the first cartridge body 111 in other ways. The first force applying portion 1321 and the second force applying portion 1326 are fixedly arranged on the connecting rod 132 and are arranged at the first longitudinal end and the second longitudinal end of the developing cartridge 11, respectively. Figure 4

[0080] The force receiving member 131 comprises a force receiving portion 1311, a rack portion (one embodiment of a driving portion) 1312, and a guide portion 1313, wherein the force receiving portion 1311 is configured to receive a force from the force applying member 1 (such as a spring) in the electrophotographic image forming apparatus, the rack portion 1312 is configured to be engaged with the gear portion 1212 of the second cartridge body 121, and the guide portion 1313 is configured to be engaged with the guide portion 1213 of the second cartridge body 121. Figure 2 ​The rack portion 1312 is fixedly connected with the force receiving portion 1311 and is used to engage with the gear portion (one embodiment of the driven portion) 1322 on the connecting rod 132, the rack portion 1312 can move following the movement of the force receiving portion 1311, the guide portion 1313 partially extends into the guide channel 1112 provided on the first cartridge body 111, it can be understood that the guide channel can also be provided on the force receiving member 131 and the guide portion cooperating with the guide channel is provided on the first cartridge body 111; in some embodiments, for example, when the developing cartridge 11 includes an end cover, the guide channel / guide portion guiding the force receiving member 131 can also be provided on the end cover. In the direction from the first longitudinal end to the second longitudinal end, the connecting rod 132 is provided with the first force applying portion 1321, the gear portion 1322, the limiting portions 1323, 1325 as the first limiting structure, the second force applying portion 1326, and the rod body 1324 as the connecting portion are fixedly connected or integrally formed with each other. The first force applying portion 1321 and the second force applying portion 1326 are both provided as cam structures, the center of the large radius arc portion is located at the center position of the rod body 1324, and the small radius arc portion extends outward away from the rod body 1324, it can be understood that the first force applying portion 1321 and the second force applying portion 1326 can be different from the structures shown in the figure, as long as they protrude radially outward relative to the rod body 1324 and can contact the first abutting portion 1211 and the second abutting portion 1212 of the drum cartridge 12. The limiting portions 1323, 1325 cooperate with the second limiting structure provided on the first cartridge body 111 to limit the longitudinal movement of the connecting rod 132, the recess 1111 of the first cartridge body 111 limits the movement of the connecting rod 132 in the direction perpendicular to the longitudinal direction, that is, the connecting rod 132 is rotatably mounted on the first cartridge body 111, so that when the force applying member 1 applies force to the force receiving portion 1311, the first force applying portion 1321 and the second force applying portion 1326 can abut against the first abutting portion 1211 and the second abutting portion 1212 of the drum cartridge 12, respectively.

[0081] When the process cartridge 100 starts to work, the developing roller 15 contacts the photosensitive drum 14 to develop an image and the like. When the process cartridge 100 installed in the electrophotographic image forming apparatus does not work, for example, when the photosensitive drum 14 needs to be cleaned, the force applying member 1 applies the force F to the force receiving portion 1311 and moves the force receiving member 131 in a manner that the guide portion 1313 moves along the guide passage 1112 toward the direction close to the photosensitive drum 14, the rack portion 1312 drives the gear portion 1322 to rotate, so that the first force applying portion 1321 and the second force applying portion 1326 provided at both ends of the connecting rod 132 respectively abut against the first abutting portion 1211 and the second abutting portion 1212 of the second cartridge body 121, and as the force applying member 1 further applies the force to the force receiving portion 1311, the connecting rod 132 further rotates, and the first force applying portion 1321 and the second force applying portion 1326 respectively abut against the first abutting portion 1211 and the second abutting portion 1212 to limit the rotation of the connecting rod 132, the reaction force applied by the first abutting portion 1211 and the second abutting portion 1212 drives the separating member 13 to move along the direction opposite to the direction in which the force F is applied by the force applying member 1, so that the first cartridge body 111 moves along the direction away from the photosensitive drum 14, and the urging member 123 moves along the direction under the elastic force of the elastic mechanism 122, so that the developing roller 15 is separated from the photosensitive drum 14. When the force applying member 1 does not apply the force to the force receiving portion 1311, the developing cartridge 11 is pushed back to the initial position in which the developing roller 15 contacts the photosensitive drum 14 under the elastic force of the elastic mechanism 122, the first abutting portion 1211 and the second abutting portion 1212 respectively push the first force applying portion 1321 and the second force applying portion 1326 to rotate reversely, and the force receiving member 131 also returns to the initial position due to the engagement between the gear portion 1322 and the rack portion 1312, so that the process cartridge 100 can start to work.

[0082] In the embodiment, the separating member 13 has a simple structure, the force separating the developing roller 15 from the photosensitive drum 14 is transmitted to the first force applying portion 1321 and the second force applying portion 1326 provided at both ends of the developing cartridge through the connecting portion, so that the developing roller 15 is separated from the photosensitive drum 14 along the direction perpendicular to the longitudinal direction, and compared with the case in which the force receiving portions are provided at both ends of the developing cartridge, the structure of the present application is simple and the developing cartridge has a compact structure. In addition, the drum cartridge 12 does not need to have other structures, and the second cartridge body 121 can abut against the first force applying portion 1321 and the second force applying portion 1326 of the developing cartridge, so that the structure of the drum cartridge is also simple, and the structure of the process cartridge is simple. Further, the electrophotographic image forming apparatus only needs to have the force applying member provided at one end of the developing cartridge, so that the structure of the electrophotographic image forming apparatus can also be simple.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] Example 2

[0087] like Figures 7-10 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.

[0088] 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.

[0089] The separating member 23 comprises a connecting rod 231 and a spring 232 sleeved on the connecting rod 231 and abutting against the first box body 211. The spring 232 is a torsion spring and is arranged as a reset mechanism. It can be understood that the reset mechanism can also be arranged in other ways. The connecting rod 231 is arranged in the recess 2111 of the first box body 211 and extends along the longitudinal direction of the developing cartridge 21, and extends from the first longitudinal end of the developing cartridge 21 to the second longitudinal end. The force receiving portion 2311 is arranged at the first longitudinal end of the connecting rod 231, and the first force applying portion 2312 is also arranged at the end and has a certain included angle with the force receiving portion 2311. The rod body 2313 serving as a connecting portion is further provided with a limiting portion 2314 serving as a first limiting structure, and the second force applying portion 2315 is arranged at the second longitudinal end of the rod body 2313. The second force applying portion 2315 is arranged in a cam structure, the center of the large radius arc portion thereof is located at the center position of the rod body 2313, and the small radius arc portion extends outward away from the rod body 2313. The limiting portion 2314 cooperates with the second limiting structure arranged on the first box body 211 to limit the longitudinal movement of the connecting rod 231. The recess 2111 of the first box body 211 limits the movement of the connecting rod 231 along the direction perpendicular to the longitudinal direction, that is, the connecting rod 231 is rotatably arranged on the first box body 211, so that it can be ensured that the first force applying portion 2312 and the second force applying portion 2315 can abut against the first abutting portion 2211 and the second abutting portion of the drum cartridge 22, respectively, when the force applying member 1 applies force to the force receiving portion 2311.

[0090] When the process cartridge 200 starts to work, the developing roller 25 contacts the photosensitive drum 24 to develop an image and so on. When the process cartridge 200 installed in the electrophotographic image forming apparatus does not work to develop an image (e.g., to clean the photosensitive drum 24), the force applying member 1 applies the force F to the force receiving portion 2311 and pushes the connecting rod 231 to rotate against the elastic force / recovery force of the spring 232, so that the first force applying portion 2312 and the second force applying portion 2315 provided at both ends of the connecting rod 231 respectively contact the two abutting portions of the drum cartridge 221, and as the force applying member 1 further applies the force to the force receiving portion 2311, the connecting rod 231 further rotates, and the two abutting portions apply the reaction force to restrict the rotation of the connecting rod 231, so that the first cartridge body 211 drives the connecting rod 231 to move in the direction opposite to the direction in which the force applying member 1 applies the force F, so that the first cartridge body 211 moves in the direction away from the photosensitive drum 24, and the developing roller 25 is separated from the photosensitive drum 24. When the force applying member 1 does not apply the force to the force receiving portion 2311, the developing cartridge 21 is pushed back to the initial position in which the developing roller 25 contacts the photosensitive drum 24 by the urging member under the elastic force of the elastic mechanism, and the spring 232 reversely rotates the connecting rod 231 under the elastic force to return the connecting rod 231 to the initial position before the force applying member 1 applies the force, and the process cartridge 200 can start to work.

[0091] It can be understood that in Embodiment 1, the developing cartridge can also be provided with a reset mechanism to return the force receiving member or the connecting rod to the initial position.

[0092] Embodiment 3

[0093] In this embodiment, the same component names as in the above embodiments will continue to be used, and the same components will not be repeatedly described herein, but the numbers corresponding to the components will be the same as in Embodiment 1.

[0094] 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 further includes a driving head 18, which is located at one end of the first cartridge body 111 in the longitudinal direction, and the driving head 18 is used to receive a driving force from an electrophotographic image forming apparatus (hereinafter referred to as “image forming apparatus”) to drive the developing roller 15 to rotate, so that the above first longitudinal end can also be regarded as a driving end of the developing cartridge 11 / process cartridge 100, and the second longitudinal end opposite to the first longitudinal end in the longitudinal direction can be regarded as a non-driving end of the developing cartridge 11 / process cartridge 100.

[0095] As 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.

[0096] 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.

[0097] Similarly, when the process cartridge 100 is working / imaging, the developing roller 15 is in contact with the photosensitive drum 14, when the process cartridge 100 is not working / imaging, for example, when the photosensitive drum 14 needs to be cleaned, the force applying member 1 starts to apply the force F to the first part 124a, and finally makes the first force applying part 1321 and the second force applying part 1326 abut against the second abutment part 1212 and the first abutment part 1211 respectively to limit the rotation of the connecting rod 132, the reaction force applied by the first abutment part 1211 and the second abutment part 1212 makes the first cartridge body 111 drive the developing roller 15 to move away from the photosensitive drum 14, and the developing roller 15 and the photosensitive drum 14 are separated from each other, i.e. the first force applying part 1321 and the second force applying part 1326 move in response to the movement of the force receiving part 1311 relative to the drum cartridge 12 / the second cartridge body 121 / the photosensitive drum 14; preferably, the first cartridge body 111 moves in the direction opposite to the direction in which the force applying member 1 applies the force F, at the same time, the elastic force of the elastic mechanism 122 is overcome, and the urging member 123 also moves away from the photosensitive drum 14, so that the developing roller 15 and the photosensitive drum 14 are separated from each other.

[0098] When the force applying member 1 does not apply the force F to the first part 124a, the developing cartridge 11 is pushed back to the initial position in which the developing roller 15 and the photosensitive drum 14 are in contact by the urging member 123 under the elastic force of the elastic mechanism 122, the second abutment part 1212 and the first abutment part 1211 push the first force applying part 1321 and the second force applying part 1326 to rotate reversely, the force receiving part 131 returns to the initial position through the abutment between the first force applying part 1321 and the protruding part 1312, at the same time, the cartridge side force applying part 124 is also reset, and the process cartridge 100 can start to work / imaging.

[0099] In some embodiments, the developing cartridge 11 can further be provided with a resetting member for resetting at least one of the force receiving part 131 and the cartridge side force applying part 124, to ensure that the force receiving part 131 and the cartridge side force applying part 124 can return to the respective initial positions.

[0100] Similarly to the embodiment 1, in the developing cartridge 11 of the present embodiment, only the force receiving part 131 needs to be arranged at the driving end, and the force for separating the developing roller 15 and the photosensitive drum 14 is transmitted to the non-driving end through the connecting part 1324 to realize the separation of the developing roller 15 and the photosensitive drum 14, and the structure of the developing cartridge 11 of the present embodiment is also simple and compact; correspondingly, only the cartridge side force applying part 124 needs to be arranged at the driving end in the drum cartridge 12, and thus the structure of the process cartridge 100 is also simple; further, the imaging device only needs to be provided with the force applying member 1 at the driving end of the process cartridge 100 / the developing cartridge 11, and thus the structure of the imaging device is also simplified.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] Specifically, the driving force transmission part 51, the first driving force receiving part 54, the second driving force receiving part 55 and the third driving force receiving part 57 are all arranged as gears, the intermediate parts include at least one idler gear, more specifically, the intermediate parts include a first idler gear / first intermediate part 52, a second idler gear / second intermediate part 53 and a third idler gear / third intermediate part 56, wherein the first idler gear / first intermediate part 52 is engaged with the driving force transmission part 51 and the second idler gear / second intermediate part 53 at the same time, i.e. the first idler gear / first intermediate part 52 connects the second idler gear / second intermediate part 53 and the driving force transmission part 51, the second idler gear / second intermediate part 53 is also engaged with the developing roller gear / second driving force receiving part 55 and the powder feeding roller gear / first driving force receiving part 54 at the same time, the third idler gear / third intermediate part 56 includes a large gear part / large diameter part 561 and a small gear part / small diameter part 562 arranged coaxially, the driving force transmission part 51 is also engaged with the large gear part / large diameter part 561, and the small gear part / small diameter part 562 is engaged with the stirring mechanism gear / third driving force receiving part 57. This kind of gear arrangement is beneficial to the miniaturization design of the developing cartridge.

[0105] In some embodiments, the driving force transmission part 51 can also be arranged as a ratchet wheel, a friction wheel or the like, and each driving force receiving part can also be arranged as a ratchet wheel, a friction wheel or the like, thus the above engagement is only one of the combination modes between the corresponding parts.

[0106] In some embodiments, the driving force transmission assembly 5 can also transmit driving force through a belt.

[0107] In some embodiments, the third idler gear / third intermediate part 56 and the stirring mechanism gear / third driving force receiving part 57 can also be omitted, thus the driving force transmission assembly 5 will be more concise.

[0108] Embodiment 4

[0109] Different from Embodiment 3, the rod body 1324 in this embodiment is arranged to move at least along a straight line, the straight line extends in a direction which is not perpendicular to the longitudinal direction, preferably, the rod body 1324 moves along a direction parallel to the longitudinal direction.

[0110] As shown in Figures 15-18 the force receiving part 131 is also arranged to rotate around an axis parallel to the longitudinal direction, wherein the force receiving part 1311 and the protruding part 1312 are arranged, the connecting rod 132 includes the rod body 1324 and the abutting part 1322 and the second force applying part 1326 respectively 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.

[0111] 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.

[0112] 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.

[0113] Further, the separating member 13 in this embodiment also includes a first reset member (part of the reset mechanism) 133, which accumulates a reset force when the force applying member 1 applies the force F, and releases the reset force when the force F is removed, so as to reset the connecting portion 1324, and at the same time, under the action of the abutting surface 1328 and the abutting surface 1314, the force receiving member 131 is also reset.

[0114] Preferably, the developing cartridge 11 also includes a second reset member (part of the reset mechanism) 134 connected with the force receiving member 131, which accumulates a reset force when the force applying member 1 applies the force F, and releases the reset force when the force F is removed, so as to make the force receiving member 131 reset more smoothly.

[0115] In some embodiments, the developing cartridge 11 also includes a guide plate 19 for guiding the movement of the second force applying portion 1326, when the pressing surface 1327 is pressed so that the second force applying portion 1326 moves away from the photosensitive drum 14, the moving direction of the second force applying portion 1326 can be guided by the guide plate 19, ensuring that the developing cartridge 11 / second force applying portion 1326 moves in a predetermined direction.

[0116] As described above, in the developing cartridge 11 in this embodiment, it is also only necessary to provide the force receiving member 131 at one of the driving end and the non-driving end, and the force separating the developing roller 15 and the photosensitive drum 14 is transmitted to the other end through the connecting portion 1324, so as to separate the developing roller 15 and the photosensitive drum 14 from each other, and the structure of the developing cartridge 11 in this embodiment is also simple and compact; accordingly, the cartridge 12 also only needs to provide the cartridge-side force applying member 124 at the driving end, and thus the structure of the process cartridge 100 is also simple; further, the image forming apparatus also only needs to provide the force applying member 1 at the driving end of the process cartridge 100 / developing cartridge 11, so that the structure of the image forming apparatus is also simplified.

[0117] Embodiment 5

[0118] On the basis of Embodiment 4, this embodiment further simplifies the separating member 13, as shown in Figures 19-21 In this embodiment, the force receiving portion 1311 is provided with a force receiving surface that is not parallel to the longitudinal direction, and the force receiving surface is provided as an inclined surface / spiral surface, which extends along the rotation direction r2 of the cartridge-side force applying member 124 after being driven by the force F, and the force receiving surface extends away from the first cartridge body 111 along the longitudinal direction; the structure of the separating member 13 at the non-driving end is the same as that of Embodiment 4, as shown in Figure 21 At the non-driving end, the developing cartridge 11 is also provided with a second force applying portion 1326, which has a pressing surface 1327 inclined with respect to the longitudinal direction.

[0119] When the force applying member 1 of the imaging device applies a force F to the cartridge side force applying piece 124, the second part 124b starts to abut against the force receiving surface which decomposes the force F into a first component force along the longitudinal direction and a second component force along a direction intersecting the longitudinal direction, the first component force forces the developing cartridge 11 as a whole to move 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 at the non-driving end abuts against the first abutting part 1211, and in turn makes the developing roller 15 and the photosensitive drum 14 separate from each other at least at the end where the pressing surface 1327 is arranged, the second component force forces the end of the developing cartridge 11 where the force receiving part 1311 is arranged to move away from the photosensitive drum 14, and in turn makes the developing roller 15 and the photosensitive drum 14 separate from each other at least at the end where the force receiving part 1311 is arranged, so that at 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 urging piece 123 moves away from the photosensitive drum 14.

[0120] When the force F is removed, the elastic mechanism 122 releases the elastic force, and the urging piece 123 again forces the developing cartridge 11 to move towards the photosensitive drum 14, and the developing roller 15 and the photosensitive drum 14 again move close to each other.

[0121] Compared with the embodiment 4, the separating member 13 in the present embodiment does not necessarily need to be provided with the connecting part 1324, or in other words, the connecting part 1324 in the present embodiment is the first cartridge body 111 itself, and the force receiving part 1311 can be regarded as the first force applying part 1321, correspondingly, the cartridge side force applying piece 124 can be regarded as the second abutting part 1212, it can be seen that the structure of the developing cartridge 11 and the structure of the drum cartridge 12 in the present embodiment can be further simplified. Preferably, the force receiving piece 131 in the present embodiment is fixedly arranged on the first cartridge body 111, when the cartridge side force applying piece 124 applies a force F to the force receiving part 1311, the force receiving part 1311 equivalent to the first force applying part 1321 will move along with the movement of the first cartridge body 111 relative to the drum cartridge 12 / second cartridge body 121 / photosensitive drum 14, or 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 cartridge 12 / second cartridge body 121 / photosensitive drum 14, at the same time, the second force applying part 1326 also moves along with the movement of the first cartridge body 111 relative to the drum cartridge 12 / second cartridge body 121 / photosensitive drum 14, or 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 cartridge 12 / second cartridge body 121 / photosensitive drum 14, and the developing roller 15 and the photosensitive drum 14 separate from each other.

[0122] Embodiment 6

[0123] As Figure 22A , Figure 22B , Figure 23 ,Figure 24 and Figure 25 For the sake of making the following description clearer, it is defined here that the direction parallel to the longitudinal direction is the left-right direction, the direction intersecting with the longitudinal direction is the front-rear direction / lateral direction, and the direction intersecting with the longitudinal direction and the front-rear direction is the up-down direction / vertical direction, preferably, the left-right direction, the front-rear direction and the up-down direction are perpendicular to each other, specifically, along the left-right direction, the driving end is located at the left of the developing cartridge 11, and the right is opposite to the left, along the front-rear direction, the developing roller 15 is arranged at the front of the developing cartridge 11, and the rear is opposite to the front, along the up-down direction, the side exposed by the developing roller 15 is the upper side, and the lower side is opposite to the upper side.

[0124] First, the structure of the drum cartridge 12 is further described, as shown in Figure 22A The drum cartridge 12 further comprises a first support 141 and a second support 142 arranged at the second cartridge body 121, the first support 141 and the second support 142 are oppositely arranged along the longitudinal direction of the developing cartridge, and the photosensitive drum 14 is supported by the first support 141 and the second support 142, the first support 141 comprises a first support main body 141a and a first extension 141b connected with each other, wherein the first support main body 141a is used for supporting the photosensitive drum 14, and the first extension 141b is formed by extending from the first support main body 141a and is used for supporting at least a part of the developing cartridge 11.

[0125] The first extension 141b comprises a first upper extension 141d and a first lower extension 141c spaced apart in the up-down direction, a first intermediate portion 141g connecting the first upper extension 141d and the first lower extension 141c, along the front-rear direction, the first upper extension 141d and the first lower extension 141c both extend backward from the first intermediate portion 141g, along the front-rear direction, at least a part of the first intermediate portion 141g faces the rear, along the up-down direction, a first mounting space 141e is formed between the first upper extension 141d and the first lower extension 141c, and the first mounting space 141e opens toward the rear, and the first upper extension 141d has a first lower surface 141f facing the first mounting space 141e.

[0126] The second support 142 has substantially the same structure as the first support 141, as shown in Figure 22B The second support 142 comprises a second support main body 142a and a second extension 142b connected with each other, wherein the second support main body 142a is used for supporting the photosensitive drum 14, and the second extension 142b is formed by extending from the second support main body 142a and is used for supporting at least a part of the developing cartridge 11.

[0127] The second extending portion 142b includes a second upper extending portion 142d and a second lower extending portion 142c which are spaced apart in the up-down direction, a second intermediate portion 142g connecting the second upper extending portion 142d and the second lower extending portion 142c, both of the second upper extending portion 142d and the second lower extending portion 142c extending rearward from the second intermediate portion 142g in the front-rear direction, at least a portion of the second intermediate portion 142g facing rearward in the front-rear direction, a second mounting space 142e being formed between the second upper extending portion 142d and the second lower extending portion 142c in the up-down direction, the second mounting space 142e being open toward the rear, and the second upper extending portion 142d having a second lower surface 142f facing the second mounting space 142e.

[0128] Further, the second cartridge body 121 has left and right side walls 1210L and 1210R spaced apart in the left-right direction, the first support member 141 is disposed close to the right side wall 1210R, the second support member 142 is disposed close to the left side wall 1210L, and 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, and the cartridge-side urging member 124 is exposed from the left side wall 1210L.

[0129] Continuing as shown in Figure 22A and Figure 22B , the urging member 123 includes a left urging member 123L and a right urging member 123R which are spaced apart in the left-right direction, the left urging member 123L opposes the left support member 142 in the front-rear direction, and the right urging member 123R opposes the right support member 141 in the front-rear direction.

[0130] The developing cartridge 11 according to the present embodiment has the same structure of the force receiving portion 1311 at the driving end as that of the embodiment 5, and thus the description thereof will not be repeated here. The structure of the second urging portion 1326 at the non-driving end is changed.

[0131] As shown in Figure 23 , the developing cartridge 11 further includes a bracket 1113, a right urging portion 1115R, the second urging portion 1326, and a third return member (part of the return mechanism) 135 which are provided at the non-driving end, the developing roller 15 is rotatably supported by the bracket 1113, the bracket 1113 is connected to the first cartridge body 111, the second urging portion 1326 and the right urging portion 1115R are provided on the bracket 1113, and the bracket 1113 can improve the versatility of the first cartridge body 111, the second urging portion 1326 is also provided with a pressing surface 1327, the pressing surface 1327 is provided such that the distance between the pressing surface 1327 and the rotational axis L in the direction perpendicular to the rotational axis gradually decreases from left to right, when the developing cartridge 11 is mounted to the drum cartridge 12, the pressing surface 1327 opposes the first lower surface 141f in the up-down direction, and the pressing surface 1327 opposes the first support member 141 in the left-right direction.

[0132] The embodiment, and the following embodiments 7 and 8, focus on the description that the pressing surface 1327 is arranged at the non-driving end, and the developing cartridge 11 receives the separating force applied by the force applying member 1 of the image forming device at the driving end. However, it can be understood that the pressing surface 1327 can also be arranged at the driving end, and the developing cartridge 11 receives the separating force applied by the force applying member 1 of the image forming device at the non-driving end.

[0133] The right forced pushing part 1115R protrudes from the bracket 1113, and is arranged to abut against the right forced pushing member 123R, so that the developing roller 15 and the photosensitive drum 14 are kept in contact / mutual proximity. In some embodiments, when a part of the right forced pushing member 123R is made of a conductive material, the right forced pushing member 123R can also serve to supply power to the developing roller 15. As shown in FIG. 1, the non-driving side of the drum cartridge 12 is provided with a power receiving member 125, and the right forced pushing member 123R is in contact with the power receiving member 125 to receive power. Figure 22B

[0134] The third reset member 135 at least includes an elastic member 1351. When the force receiving part 1311 receives the separating force, the developing roller 15 and the photosensitive drum 14 are separated from each other at the first longitudinal end of the developing cartridge 11, and at the same time, the developing cartridge 11 moves to the right, the elastic member 1351 is elastically deformed, the pressing surface 1327 is pressed against the first support member 141, and conversely, the first support member 141 applies a counter force to the pressing surface 1327. Under the action of the counter force, the developing cartridge 11 moves backward, and at the second longitudinal end of the developing cartridge 11, the developing roller 15 and the photosensitive drum 14 are also separated from each other. Finally, the developing roller 15 and the photosensitive drum 14 are separated from each other in the left-right direction, and at the same time, the forced pushing member 123 (including the left forced pushing member 123L and the right forced pushing member 123R) is forced to move by the developing cartridge 11, so that the elastic mechanism 122 accumulates elastic force. When the separating force is removed, the elastic member 1351 releases the elastic force, the developing cartridge 11 moves to the left, and at the same time, the elastic mechanism 122 releases the elastic force, and the forced pushing member 123 forces the developing cartridge 11 to move forward to reset.

[0135] In the embodiment, the first support member 141 has a part for pressing against the pressing surface 1327, as shown in FIG. 1. Figure 22A and Figure 24 ​As shown, the part for extruding with the extruding surface 1327 is the edge / surface (first abutting part) 1211 provided on the first support 141, the edge / surface 1211 (first abutting part) is adjacent to the first lower surface 141f, along the front-rear direction, the extruding surface 1327 is located in front of the rotation axis L of the developing roller 15, when the extruding surface 1327 and the developing roller 15 are both projected along the direction perpendicular to the rotation axis L, at least a part of the developing roller 15 overlaps with the extruding surface 1327; according to the description of the present embodiment and the above-mentioned embodiments, the first abutting part 1211 can be provided on the second box body 121 or the first support 141.

[0136] In some embodiments, the third reset member 135 further comprises an abutting block 1352, preferably, the elastic member 1351 is arranged between the abutting block 1352 and the first box body 111 / bracket 1113, on the one hand, the abutting block 1352 can protect the elastic member 1351, on the other hand, the abutting block 1352 can also limit the movement track of the elastic member 1351, to ensure that the developing cartridge 11 moves along the predetermined path; more preferably, the abutting block 1352 is further provided with a cooperated part 1353, through the cooperated part 1353, the position of the abutting block 1352 in the developing cartridge 11 can be accurately positioned, so that the movement track of the elastic member 1351 can be effectively controlled by the abutting block 1352, accordingly, the right side wall 1210R is provided with a cooperated part 121a for cooperating with the cooperated part 1353.

[0137] In one embodiment of the cooperated part 1353, as shown in Figure 24 The cooperated part 1353 and the cooperated part 121a are both arranged as step parts which can cooperate with each other; the cooperated part 1353 and the cooperated part 121a can also be arranged as shaft hole cooperation structure, key groove cooperation structure, etc.

[0138] In one deformable embodiment, at least one of the right forced pushing part 1115R and the second force applying part 1326 can also be arranged on the first box body 111. As described above, the extruding surface 1327 in the present embodiment is arranged to face upward, when the developing cartridge 11 is mounted to the drum cartridge 12, preferably, the extruding surface 1327 and the first abutting part 1211 have a first gap therebetween, the first gap is between 0.5mm-3mm, to ensure that the developing roller 15 and the photosensitive drum 14 keep stable contact during the imaging operation; more preferably, the second force applying part 1326 and the photosensitive drum 14 have a second gap g therebetween, the second gap g is between 1mm-5mm, to prevent the photosensitive drum 14 from being damaged by colliding with the second force applying part 1326.

[0139] Further, 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, the pressing surface 1327 starts to abut against the first abutting part 1211 and is pressed, the developing cartridge 11 has the tendency to be pressed downward, that is, the upward movement of the developing cartridge 11 is prevented, under the guidance of the first lower extension part 141c, the developing cartridge 11 moves backward, the developing roller 15 and the photosensitive drum 14 are separated from each other.

[0140] The installation process of the developing cartridge 11 toward the drum cartridge 12 will be described below. Figure 24 and Figure 25 The installation process of the developing cartridge 11 toward the drum cartridge 12 will be described below.

[0141] Firstly, the developing cartridge 11 approaches the drum cartridge 12 in an upside-down posture (the developing roller 15 is 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, so that the developing cartridge 11 is preliminarily positioned in the drum cartridge 12, and the developing cartridge 11 is in the first state.

[0142] Subsequently, the right forced pushing part 1115R starts to slide against the right forced pushing piece 123R, the developing cartridge 11 rotates at the abutting position of the right forced pushing part 1115R and the right forced pushing piece 123R as the support point until the cooperating part 1353 and the cooperating part 121a are cooperated, at this time, the pressing surface 1327 is opposite to the first abutting part 1211, at the driving end of the developing cartridge 11, the developing cartridge 11 can also rotate at the slide abutting position of the left forced pushing part 1115L provided at the driving end and the left forced pushing piece 123L as the support point, the developing cartridge 11 is forced to move by the forced pushing piece 123 so that the developing roller 15 and the photosensitive drum 14 are close to / come into contact with each other, and the developing cartridge 11 is in the second state.

[0143] In some embodiments, the pressing surface 1327 can also be arranged to be opposite to the first intermediate part 141g in the front-back direction when the developing cartridge 11 is installed to the drum cartridge 12, that is, the pressing surface 1327 is arranged to face the front, the part of the first support piece 141 used to press the pressing surface 1327 is still the edge / surface (the first abutting part) 1211 of the first support piece 141, the edge / surface 1211 is adjacent to the first installation space 141e, when the developing cartridge 11 moves to the right so that the pressing surface 1327 abuts against the first abutting part 1211, the developing cartridge 11 will directly move backward, the developing roller 15 and the photosensitive drum 14 are separated from each other, in this structure, the upward movement of the developing cartridge 11 can also be blocked by the first upper extension part 141d.

[0144] Embodiment 7

[0145] As Figure 26 shown, the same components and structures as in the above embodiments are not described here again, in this embodiment, the second force applying part 1326 is provided as a protrusion protruding from the first cartridge body 111 or the bracket 1113, and the pressing surface 1327 is provided as an inclined surface on the second force applying part 1326, the inclined direction of which is along the direction from left to right, and the distance between the pressing surface 1327 and the rotation axis L of the developing roller 15 gradually increases in the front-rear direction; the first abutting part 1211 for abutting against the pressing surface 1327 is formed by extending from the right side wall 1210R to the left.

[0146] Compared with embodiment 6, in the front-rear direction, the pressing surface 1327 in this embodiment is arranged farther away from the developing roller 15, preferably, the pressing surface 1327 is arranged at the rear side of the developing roller 15, so that during the installation of the developing cartridge 11 towards the drum cartridge 12, the second force applying part 1326 provided with the pressing surface 1327 can be prevented from contacting the photosensitive drum 14; preferably, a gap is formed between the pressing surface 1327 and the first abutting 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.

[0147] Embodiment 8

[0148] As Figure 27A and Figure 27B shown, in this embodiment, the second force applying part 1326 / pressing surface 1327 arranged at the non-driving end is arranged to abut against a component in the image forming device, that is, the first abutting part 1211 is no longer arranged in the drum cartridge 12, or the first abutting part 1211 for mutual pressing with the pressing surface 1327 is arranged in the image forming device.

[0149] As Figure 27A shown, the guide rail 9 is arranged in the image forming device, and during the installation or removal of the developing cartridge 11 / processing cartridge 100 towards the image forming device, the developing cartridge 11 / processing cartridge 100 is guided by the guide rail 9; specifically, the image forming device further includes a guided protrusion / second force applying part 1326 arranged at the non-driving end, and the pressing surface 1327 is arranged on the guided protrusion 1326, preferably, the pressing surface 1327 is an inclined surface arranged on the guided protrusion 1326, which can be an inclined plane or an inclined arc surface, Figure 27A An embodiment in which the pressing surface 1327 is provided as a conical surface is shown.

[0150] When the driving end of the developing cartridge 11 receives the separation force and moves the developing cartridge 11 to the right, the pressing surface 1327 is pressed against the guide surface 91 or the edge / surface adjacent to the guide surface 91 arranged on the guide rail 9, until at least a part of the pressing surface 1327 reaches above the guide surface 91.

[0151] Example 9

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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 is used to abut against the first abutment portion 1211 provided at the non-drive end, so that the developing roller 15 and the photosensitive drum 14 are simultaneously separated from each other at the drive end and the non-drive end.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] Preferably, when the developing cartridge 11 is mounted to the drum cartridge 12, a gap is formed between the left pressing surface 1327L and the second abutting portion 1212 and between the right pressing surface 1327R and the first abutting portion 1211, to ensure that the developing roller 15 and the photosensitive drum 14 maintain stable contact.

[0162] As can be known from the above description, the separating member 13 in the present embodiment does not need to be provided with a reset member / reset mechanism any more, but uses the elastic member 93 in the image forming apparatus for urging the driving force output member 92 to urge the developing cartridge 11 to reset, so that the structure of the separating member 13 will become simpler; it can be understood that, in the above-mentioned 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 image forming apparatus, to ensure that the developing cartridge 11 can be reset smoothly.

[0163] Embodiment 10

[0164] Based on the structure described in the above embodiments, the present embodiment continues to optimize the structure of the developing cartridge 11, to ensure that the developing roller 15 and the photosensitive drum 14 are completely separated.

[0165] As shown in Figure 30 , the developing cartridge 11 further comprises a range-extending member 1114, which is used to abut against an acting portion other than the developing cartridge 11, so that the developing roller 15 and the photosensitive drum 14 are completely separated, the acting portion can be provided on the drum cartridge 12 or in the image forming apparatus.

[0166] As described above, the separating member 13 can be provided at the driving end or at the non-driving end, and the range-extending member 1114 is provided at the end opposite to the end where the separating member 13 is located, that is, the range-extending member 1114 is not provided at the same side as the separating member 13, when the separating member 13 is provided at the driving end, the range-extending member 1114 is provided at the non-driving end, and when the separating member 13 is provided at the non-driving end, the range-extending member 1114 is provided at the driving end.

[0167] Continuing as shown in Figure 30 , the developing roller 15 comprises a developing layer 151 and a developing roller shaft 152, the developing roller shaft 152 is rotatably supported by the bracket 1113, and along the longitudinal direction, the developing roller shaft 152 protrudes from the developing layer 151, and the size of the developing roller shaft 152 between the driving end and the non-driving end is greater than the size of the developing layer 151 between the driving end and the non-driving end, the developing layer 151 has a left end 151a at the driving end and a right end 151b at the non-driving end, and the area (carrying area) S between the left end 151a and the right end 151b is used to carry the developer, that is, the two ends of the developing layer 151 form a carrying area S for carrying the developer, and when the developing roller 15 and the photosensitive drum 14 approach each other, the developing layer 151 and the photosensitive drum 14 are in contact.

[0168] At least a part of the range extender 1114 is located outside the bearing area S in the longitudinal direction, specifically, at least a part of the range extender 1114 is located left of the left end 151a, or at least a part of the range extender 1114 is located right of the right end 151b.

[0169] In specific embodiments, at least a part of the contact position (contact point or contact surface or contact line) between the range extender 1114 and the acting part is located outside the bearing area S, and at least a part of the contact position is located left of the left end 151a, or at least a part of the contact position is located right of the right end 151b.

[0170] Figure 31 In the embodiment where the acting part is the first intermediate part 141g, the range extender 1114 is arranged on the bracket 1113, and in some embodiments, the range extender 1114 can also be arranged on the first cartridge 111.

[0171] When the developing cartridge 11 is mounted to the drum cartridge 12, the range extender 1114 is opposite to the first intermediate part 141g, and before the separation member 13 receives the force F, as shown in Figure 32A The developing roller 15 and the photosensitive drum 14 remain in contact / are close to each other, the developing roller 15 rotates around the rotation axis L, the photosensitive drum 14 rotates around the rotation axis X, and the right end 151b is in contact with the photosensitive drum 14 at the contact point P1.

[0172] It should be noted that the range extender 1114 opposite to the first intermediate part 141g means that the range extender 1114 faces the first intermediate part 141g in the front-rear direction, and the two can be in a state of maintaining a gap or in a state of just contacting but not generating extrusion force.

[0173] In existing products, when the separation member 13 receives the force F, the developing roller 15 rotates around the point P1 relative to the photosensitive drum 14 along the direction r with the developing cartridge 11 as a whole, and at the driving end, the developing roller 15 and the photosensitive drum 14 are separated from each other, or the left end 151a and the photosensitive drum 14 are separated from each other, but at least the right end 151b and the photosensitive drum 14 can still remain in contact. In the case where the developing cartridge 11 is in a long-term non-use state, the developing layer 151 can be deformed at least at the position of the right end 151b, or the photosensitive drum 4 can be contaminated.

[0174] As shown in Figure 32BAs shown, in the developing cartridge 11 involved in the present embodiment, along the longitudinal direction, at least a part of the range-extending member 1114 is located right of the right end 151b, or in other words, at least a part of the range-extending member 1114 is farther away from the left end 151a than the right end 151b, when the separating member 13 receives the force F, at the non-driving end, the range-extending member 1114 abuts against the first intermediate portion 141g at a point P2 (an embodiment of the contact position, when the range-extending member 1114 forms a surface joint or a line joint with the first intermediate portion 141g, the middle point of the surface or the line is taken), the point P1 is out of contact with the photosensitive drum 14.

[0175] For the purpose of facilitating the understanding of the present solution, Figure 33 As shown, in the developing cartridge and the developing cartridge involved in the present embodiment, during the process of separating the developing roller 15 and the photosensitive drum 14 from each other, the rotation axis L of the developing roller 15 moves relative to the rotation axis X of the photosensitive drum 14, and the included angle formed between the two is compared, L1 in the figure represents the rotation axis of the developing roller in the existing developing cartridge, and L2 in the figure represents the rotation axis of the developing roller in the developing cartridge involved in the present embodiment.

[0176] When the separating member 13 receives the force F, in the existing developing cartridge, the developing roller 15 / developing cartridge 11 rotates around the point P1, the included angle formed 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 the present embodiment, the developing roller 15 / developing cartridge 11 rotates around the point P2, the included angle formed between the rotation axis L2 of the developing roller 15 and the rotation axis X of the photosensitive drum 14 is a2, and a2>a1.

[0177] Therefore, in an embodiment, the point P2 is located right of the point P1, or in other words, the point P2 is farther away from the driving end (the end where the separating member 13 is located, or the end where the separating member 13 is used to receive the force F) than the point P1; on the contrary, when the separating member 13 is arranged at the non-driving end, or the separating member 13 receives the force F at the non-driving end, the point P2 will be located left of the point P1, or in other words, the point P2 is farther away from the non-driving end than the point P1.

[0178] In an embodiment, the point P1 and the point P2 are both located in a plane that simultaneously passes through the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14, in this way, the movement trajectory of the developing roller 15 and the photosensitive drum 14 when they are separated will be more stable.

[0179] In an embodiment, in the plane, along the direction perpendicular to the longitudinal direction, the point P2 is farther away from the rotation axis X of the photosensitive drum 14 than the point P1, or in other words, the point P2 is farther away from the surface of the photosensitive drum 14 than the point P1.

[0180] Embodiment 11

[0181] Based on the inventive concept of Embodiment 10, as Figure 34As shown, the range-extending member 1114 in this embodiment is still arranged on the bracket 1113, and in the longitudinal direction, the range-extending member 1114 is still located outside the bearing area S, but when the developing cartridge 11 is installed to the drum cartridge 12, the range-extending member 1114 is directly opposite the photosensitive drum 14, and thus the acting part in this embodiment is the photosensitive drum 14.

[0182] The direct opposite of the range-extending member 1114 to the photosensitive drum 14 means that in the front-rear direction, the range-extending member 1114 faces the photosensitive drum 14, and the two can be in a state of keeping a gap or in a state of just contacting but not generating a pressing force.

[0183] In some embodiments, the range-extending member 1114 can also be arranged on the first cartridge body 111.

[0184] When the separating member 13 receives the force F, the developing roller 15 will rotate with the developing cartridge 11 as a whole relative to the photosensitive drum 14, and the range-extending member 1114 contacts 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 where the separating member 13 receives the force F) than point P1; conversely, when the separating member 13 is arranged at the non-driving end, or the separating member 13 receives the 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, and the developing roller 15 in this embodiment will be completely separated from the photosensitive drum 14.

[0185] In an embodiment, both point P1 and point P2 are located in a plane that simultaneously passes through the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14, so that the motion trajectory of the developing roller 15 and the photosensitive drum 14 when they are separated will be more stable.

[0186] In an embodiment, both the developing layer 151 and the range-extending member 1114 contact the surface of the photosensitive drum 14, and thus in the plane, in 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.

[0187] In an embodiment, the developing layer 151 contacts the surface of the photosensitive drum 14, but the range-extending member 1114 does not contact the photosensitive drum 14, and the two are spaced apart from each other, which is beneficial to prevent the surface of the photosensitive drum 14 from being worn.

[0188] Embodiment 12

[0189] Based on the inventive concept of embodiment 10, as Figure 35As shown, the range-extending member 1114 in the present embodiment is arranged on the bracket 1113 or the first cartridge body 111, and when the developing cartridge 11 is installed to the drum cartridge 12, the range-extending member 1114 is opposite to the second cartridge body 121, and thus the acting portion 126 in the present embodiment is a part of the second cartridge body 121 itself.

[0190] The opposite of the range-extending member 1114 to the second cartridge body 121 means that the range-extending member 1114 faces the second cartridge body 121 along the front-rear direction, and the two can be in a state of keeping a gap or in a state of just contacting but not generating a pressing force.

[0191] Along the longitudinal direction, the range-extending member 1114 is still located outside the bearing area S, and when the separation member 13 receives the force F, the point P2 at which the range-extending member 1114 abuts against the acting portion 126 is located to the right of the point P1, or in other words, the point P2 is farther away from the driving end (the end where the separation member 13 is located or the end where the separation member 13 receives the force F) than the point P1; conversely, when the separation member 13 is arranged at the non-driving end or the separation member 13 receives the force F at the non-driving end, the point P2 will be located to the left of the point P1, or in other words, the point P2 is farther away from the non-driving end than the point P1, and the developing roller 15 in the present embodiment will be completely separated from the photosensitive drum 14.

[0192] In an embodiment, the points P1 and P2 are both located in a plane that simultaneously passes through the rotation axis L of the developing roller 15 and the rotation axis X of the photosensitive drum 14, and thus the movement track of the developing roller 15 and the photosensitive drum 14 when they are separated will be more stable.

[0193] In an embodiment, in the plane, along a direction perpendicular to the longitudinal direction, the point P2 is farther away from the rotation axis X of the photosensitive drum 14 than the point P1, or in other words, the point P2 is farther away from the surface of the photosensitive drum 14 than the point P1.

[0194] In summary, in the plane, along a direction perpendicular to the longitudinal direction, the point P2 is not closer to the rotation axis X of the photosensitive drum 14 than the point P1.

[0195] As described above, in the developing cartridge related to Embodiment 10, Embodiment 11 and Embodiment 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 are both out of contact with the photosensitive drum 14 in the longitudinal direction, the distance at which the developing roller 15 and the photosensitive drum 14 are out of contact with each other at one end (the driving end) of the developing cartridge is different from the distance at which the developing roller 15 and the photosensitive drum 14 are out of contact with each other at the other end (the non-driving end) of the developing cartridge, and the distance at which the developing roller 15 and the photosensitive drum 14 are out of contact with each other can gradually decrease from left to right or gradually increase from left to right, so that the developing layer 151 does not come into contact with the photosensitive drum 14 even when the developing cartridge 11 is in a state of long-term non-use, and neither the developing roller 15 nor the photosensitive drum 14 is damaged or contaminated.

[0196] Embodiment 13

[0197] This embodiment provides another separation member 13, as shown in Figure 36 , Figure 37 , Figure 38A and Figure 38B , the separation member 13 includes a main body portion 1310, a force receiving member 131 and a force applying portion 1326, the main body portion 1310 is fixedly arranged relative to the first cartridge body 111, the force receiving member 131 is connected with the main body portion 1310 and is used to receive the force F applied by the force applying member 1 of the electrophotographic image forming apparatus, the force applying portion 1326 is also connected with the main body portion 1310, through the force applying portion 1326, the force F is applied to a force receiving portion outside the developing cartridge 11, and then the force receiving portion reacts on the force applying portion 1326, so that the first cartridge body 111 moves relative to the drum cartridge 12 / second cartridge body 121 / photosensitive drum 14; the force receiving portion can be at least one of the first abutting portion 1211 and the second abutting portion 1212 (as shown in Figure 5 ), and can also be a component arranged in the drum cartridge 12 or a component in the electrophotographic image forming apparatus PM.

[0198] This embodiment will be described by taking the force receiving portion as a component arranged in the electrophotographic image forming apparatus PM, first referring to Figure 38A and Figure 38B , the electrophotographic image forming apparatus PM is further provided with a laser PM1 for emitting a laser beam carrying image information to the surface of the photosensitive drum 14, when the developing cartridge 11 / treatment cartridge 100 is installed to a predetermined position of the electrophotographic image forming apparatus PM, the laser PM1 is opposite to the photosensitive drum 14, so that the laser PM1 can emit the laser beam to the surface of the photosensitive drum 14, so that the surface of the photosensitive drum 14 forms an electrostatic latent image, and the force receiving portion is the laser PM1.

[0199] The force receiving member 131 is provided with a force receiving portion 1311 for receiving the force F, and the force applying portion 1326 can be formed integrally with the force receiving portion 131 or formed separately, as long as the force applying portion 1326 can move in response to the movement of the force receiving portion 1311 relative to the drum cartridge 12 / second cartridge body 121 / photographic drum 14.

[0200] In some embodiments, the force receiving portion 1311 is a plane provided on the force receiving member 131, and the plane is arranged to be perpendicular to the direction of the force F when the force applying member 1 starts to apply the force F to the separation member 13, so that the force F can be more effectively applied to the plane, thereby improving the separation efficiency.

[0201] In some embodiments, the laser PM1 is arranged to move with the movement of the door cover, for example, when the door cover is gradually closed, the laser PM1 moves towards the direction close to the photographic drum 14, and when the door cover is gradually opened, the laser PM1 moves towards the direction away from the photographic drum 14; the force applying member 1 has a first position A, a second position B and a third position C as shown in Figure 37 , in the first position A, the door cover is in an open state, in the second position B, the door cover is in a closed state, and the developing roller 15 and the photographic drum 14 are in a state of approaching each other, and in the third position C, the door cover is in a closed state, and the force applying member 1 is about to start to apply the force F to the separation member 13.

[0202] The main body portion 1310, the force receiving member 131 and the force applying portion 1326 can be formed integrally or separately, but the force applying portion 1326 always protrudes from the main body portion 1310, as shown in Figure 37 , the force applying portion 1326 protrudes from the first cartridge body 111 when viewed along the longitudinal direction.

[0203] In some embodiments, the force applying portion 1326 has a force applying surface 1329 formed in an arc shape, which is beneficial to protect the force receiving portion and prevent the force receiving portion from being damaged due to excessive force concentration; the force applying portion 1326 and the force receiving portion will form a line contact, and the position where the force applying portion 1326 / force applying surface 1329 and the force receiving portion abut will form an abutment point D, as shown in Figure 38A , when the developing cartridge 11 / processing cartridge 100 is installed to the predetermined position of the image forming apparatus, the force applying portion 1326 / force applying surface 1329 contacts the laser PM1 as the force receiving portion, so that the force F applied by the force applying member 1 can be more efficiently transmitted to the laser PM1.

[0204] In some embodiments, when the developing cartridge 11 / processing cartridge 100 is installed to the predetermined position of the image forming apparatus, the force applying portion 1326 / force applying surface 1329 can not be in contact with the laser PM1 as the force receiving portion, and the gap therebetween can range from 0.1 mm to 10 mm, so that the laser PM1 can be prevented from interfering with the force applying portion 1326 during movement of the laser PM1 toward the direction of the photosensitive drum 14.

[0205] As described above, when the force applying member 1 applies the force F to the separation member 13, the force applying portion 1326 transmits the force F to the laser PM1, and then the laser PM1 applies a reaction force to the force applying portion 1326, which forces the separation member 13 to move the first cartridge body 111 relative to the drum cartridge 12 / second cartridge body 121 / photosensitive drum 14, and thus the developing roller 15 and the photosensitive drum 14 change from the state of approaching each other to the state of separating from each other.

[0206] Specifically, in some embodiments, under the action of the reaction force, the first cartridge body 111 will rotate around the abutting point D along the direction indicated by r4, i.e., the rear part of the abutting point D moves upward, and the front part of the abutting point D moves downward, and the developing roller 15 and the photosensitive drum 14 separate from each other, and a second gap g is formed therebetween. Figure 38B

[0207] In some embodiments, under the action of the reaction force, the first cartridge body 111 moves backward as a whole under the guidance of the first mounting space 141e (as shown in FIG. 14B), and the developing roller 15 and the photosensitive drum 14 separate from each other, and a second gap g is formed therebetween. Figure 22A Figure 22B In some embodiments, under the action of the reaction force, the first cartridge body 111 moves backward as a whole under the guidance of the first mounting space 141e (as shown in FIG. 14B), and the developing roller 15 and the photosensitive drum 14 separate from each other, and a second gap g is formed therebetween.

[0208] Therefore, under the action of the reaction force, the first cartridge body 111 is guided by the guiding portion other than the developing cartridge, which can rotate or slide, but ultimately achieves the separation of the developing roller 15 and the photosensitive drum 14 from each other. The guiding portion can be the above-mentioned first mounting space 141e, or a guiding space provided in the image forming apparatus. Specifically, the specific shape of the guiding portion should not be limited, which can be linear or curved.

[0209] In some embodiments, the force applying surface 1329 extends along the longitudinal direction, so that the contact area of the force applying surface 1329 and the force receiving portion can be increased, and the separation efficiency can be improved.

[0210] ​​In some embodiments, a straight line passing through the abutting point D and parallel to the direction of the force F is set as a first auxiliary line m1, a second auxiliary line m2 and a third auxiliary line m3 parallel to the first auxiliary line m1 are made along the front-rear direction, respectively passing through the front end point and the rear end point of the developing cartridge 11, a first region Q1 is formed between the first auxiliary line m1 and the second auxiliary line m2, a second region Q2 is formed between the first auxiliary line m1 and the third auxiliary line m3, wherein the developing roller 15 is located in the first region Q1, the force receiving portion 1311 is located in the second region Q2, the length of the first region Q1 is n1 along a direction perpendicular to the direction of the force F (for example, the front-rear direction), and the length of the second region Q2 is n2.

[0211] In some embodiments, n2>n1, so that the imaging device only needs to apply a smaller force F to make the developing roller 15 and the photosensitive drum 14 change from the state of approaching each other to the state of separating from each other; as shown in the figure, along the front-rear direction, the force receiving portion 1311, the force applying portion 1326 / force applying surface 1329 / abutting point D, and the developing roller are arranged in sequence from back to front. Obviously, the closer the force receiving portion 1311 is to the third auxiliary line m3, the higher the separation efficiency of the developing roller 12 and the photosensitive drum 22. Figure 38A

[0212] In some embodiments, the separation member 13, the first cartridge body 111, and the bracket 113 can be formed integrally in three, or integrally in any two, or separately into three independent components.

[0213] As described above, when the developing cartridge 11 is installed to the drum cartridge 12, the urging member in the drum cartridge 12 applies an urging force to the urged portion in the developing cartridge 11, so that the developing roller 15 and the photosensitive drum 14 can be kept in the state of approaching each other, and thus, under the action of the reaction force, when at least a part of the first cartridge body 111 moves backward to make the developing roller 15 and the photosensitive drum 14 change from the state of approaching each other to the state of separating from each other, the drum cartridge 12 can also move together with the developing cartridge 11, which may make the photosensitive drum 14 deviate from the recording medium. Therefore, in some embodiments, the developing cartridge 11 further comprises a drum cartridge limiting portion 136 for limiting the movement of the drum cartridge 12 together with the developing cartridge 11, as shown in the figure, the drum cartridge limiting portion 136 can move together with the movement of the first cartridge body 111. Figure 38A Figure 38B As shown in the figure, under the action of the reaction force, when the first cartridge body 111 rotates or slides to make the developing roller 15 and the photosensitive drum 14 change from the state of approaching each other to the state of separating from each other, the drum cartridge limiting portion 136 abuts against the drum cartridge 12, so that the movement of the drum cartridge 12 together with the developing cartridge 11 is limited.

[0214] ​​In some embodiments, power transmission member 144 is further provided at the longitudinal end of photosensitive drum 14, which receives power from the image forming apparatus through electrical contact with the image forming apparatus and supplies the power to the photosensitive drum. When drum cartridge 12 is limited by drum cartridge limiting portion 136, power transmission member 144 will be able to maintain stable electrical contact with the image forming apparatus.

[0215] In some embodiments, at least one of at least a portion of developing roller 15 and at least a portion of photosensitive drum 14 overlaps with force applying portion 1326 in the front-rear direction, so that the size of developing cartridge 11 in the direction intersecting the front-rear direction can be controlled, which is conducive to the miniaturization of developing cartridge 11 / treatment cartridge 100.

[0216] In some embodiments, separation member 13 can be provided at at least one of the driving end and the non-driving end. When separation member 13 is provided only at one of the driving end and the non-driving end, under the action of force F, developing roller 15 and photosensitive drum 14 can present a state as shown in FIG. 8A. When force F is large enough, developing roller 15 and photosensitive drum 14 will be completely separated in the longitudinal direction. Figure 32B

[0217] In some embodiments, the force receiving portion can also be other components of the image forming apparatus, for example, the force receiving portion is the upper cover, side cover, etc. of the image forming apparatus. The force receiving portion can also be a part of drum cartridge 12, for example, the force receiving portion is an extension protrusion formed extending from second cartridge body 121, and force applying portion 1326 is able to abut against the extension protrusion.

[0218] In the process of moving developing cartridge 11 relative to drum cartridge 12 so that developing roller 15 and photosensitive drum 14 change from the state of approaching each other to the state of separating from each other, chip 32 can move towards contact pin 403, so that contact pin 403 is further pressed by chip 32. In the long run, not only can contact pin 403 be irreversibly deformed, but the force acting on chip 32 from contact pin 403 will also increase, so that the electrical contact between chip 32 and contact pin 403 becomes unstable, and chip 32 is damaged. When elastic member 33 is provided between chip 32 and chip holder 31, not only can chip 32 and contact pin 403 be kept in the state of elastic electrical contact, but also in the process of moving first cartridge body 111 relative to second cartridge body 121, chip 32 can move away from contact pin 403, so as to reduce the pressing force of contact pin 403 from chip 32. In turn, the force acting on chip 32 can also be reduced, thereby prolonging the service life of contact pin 403 and chip 32.

[0219] Example 14

[0220] As Figure 39 ​As 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] like Figure 40BAs shown, when the developing cartridge 11 does not need to develop in the image forming device, the force applying member 1 rotates around the rotation axis L4 in the direction indicated by r3, and further drives the cartridge-side force applying piece 124 / second portion 124b to rotate around the rotation axis L3 in the direction indicated by r2 until the force receiving part 1311 is opposite to the second intersection D2. With the continuous rotation of the cartridge-side force applying piece 124, the second portion 124b pushes the force receiving part 131, so that the first cartridge body 111 drives the developing roller 15 to move away from the photosensitive drum 14. The state of the developing roller 15 and the photosensitive drum 14 approaching each other changes to the state of separating from each other, and the second gap g is formed between them.

[0226] As described above, by setting the force receiving part 1311 as a plane at least partially facing forward, in the process of the rotation of the second portion 124b in the direction indicated by r2, the force receiving part 1311 changes from being opposite to the first intersection D1 to being opposite to the second intersection D2 without having to completely pass through the second intersection D2, so that the force receiving part 1311 is opposite to the third side edge 124b3. This is beneficial to reduce the requirement of the force F applied to the force applying member 1, so that the developing roller 15 and the photosensitive drum 14 can more smoothly change from the state of approaching each other to the state of separating from each other. That is, when the developing roller 15 and the photosensitive drum 14 are in the state of approaching each other and the state of separating from each other respectively, the force receiving part 1311 is opposite to two ends of the same surface of the cartridge-side force applying piece 124 respectively.

[0227] In some embodiments, when the developing roller 15 and the photosensitive drum 14 are in the state of approaching each other and the state of separating from each other respectively, the force receiving part 1311 can also not be opposite to the first intersection D1 and the second intersection D2, but be opposite to two different positions of the second side edge 124b2 respectively, which are between the first intersection D1 and the second intersection D2. Thus, the force receiving part 1311 can also be regarded as being opposite to two ends of the same surface of the cartridge-side force applying piece 124 respectively.

[0228] It should be noted that when the developing roller 15 and the photosensitive drum 14 are in the state of approaching each other, the force receiving part 1311 being opposite to the first intersection D1 and the force receiving part 1311 being opposite to the second side edge 124b2 should be understood as that the force receiving part 1311 and the first intersection D1 can be in the state of abutting each other or the state of being spaced apart from each other. When the developing roller 15 and the photosensitive drum 14 are in the state of separating from each other, the force receiving part 1311 being opposite to the second intersection D2 and the force receiving part 1311 being opposite to the second side edge 124b2 should be understood as that the force receiving part 1311 and the second intersection D2 or the second side edge 124b2 abut each other. In some embodiments, as shown in FIG. 6, the force receiving part 1311 and the second side edge 124b2 abut each other. Figure 39As shown, the developing cartridge 11 further comprises an end cover (right end cover) 110 arranged at the right end (non-driving end) of the first cartridge body 111, the end cover 110 is fixedly arranged relative to the first cartridge body 111, and the separation member 13 is also fixedly arranged relative to the first cartridge body 111, for example, the end cover 110 is fixedly mounted on the first cartridge body 111, and the separation member 13 is fixedly mounted on at least one of the first cartridge body 111 and the end cover 110.

[0229] In some embodiments, the developing cartridge 11 further comprises a powder filling port cover 1119a for sealing a powder filling port 111b for allowing replenishment of the developing agent into the first cartridge body 111; the powder filling port cover 1119a comprises a cover body 1119a1 and at least one of a locking portion 101 and a forced pushing portion (for example, a right forced pushing portion 1115R) arranged on the cover body 1119a1, wherein the locking portion 101 is configured to cooperate with a locking piece in the drum cartridge 12, so that the developing cartridge 11 is locked in the drum cartridge 12, and the right forced pushing portion 1115R is forced by the right forced pushing piece 123R, so that the developing roller 15 and the photosensitive drum 14 are kept in a state of close proximity to each other.

[0230] In some embodiments, in order to make the developing cartridge 11 more smoothly installed into the drum cartridge 12 or more smoothly removed from the drum cartridge 12, the drum cartridge 12 is further provided with an auxiliary installation piece (not shown) such as a rotating wheel, and correspondingly, the developing cartridge 11 is provided with a cooperating installation piece for cooperating with the auxiliary installation piece, such as Figure 41 As shown, the cooperating installation piece comprises at least one of a left auxiliary piece 1117e arranged on the end cover 1117 and a right auxiliary piece 1101 arranged on the end cover 110, and the left auxiliary piece 1117e and the right auxiliary piece 1101 are both configured to cooperate with the auxiliary installation piece during installation and removal of the developing cartridge 11 in the drum cartridge 12; specifically, the left auxiliary piece 1117e and the right auxiliary piece 1101 are arranged as protrusions or ribs, and the left auxiliary piece 1117e and the right auxiliary piece 1101 are respectively configured to cooperate with the rotating wheel, so that the developing cartridge 11 is more smoothly installed into the drum cartridge 12 or more smoothly removed from the drum cartridge 12 due to the rolling action of the rotating wheel.

[0231] In some embodiments, at least a portion of the force receiving portion 1311 is directed towards the front, preferably, the force receiving portion 1311 is parallel to the longitudinal direction.

[0232] In some embodiments, the direction in which the force receiving portion 1311 is directed 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 portion 1311 can receive the force F.

[0233] 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.

[0234] Example 15

[0235] Based on Examples 6 and 9, this example further optimizes the structure of the separation component 13.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] In some embodiments, the first surface 1311a is arranged in a curved shape, and the distance between the first surface 1311a and the first cartridge 111 in the longitudinal direction is different at two ends (front end and rear end) in the transverse direction, specifically, the distance between the front end of the first surface 1311a and the first cartridge 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first cartridge 111 in the longitudinal direction, and the front end and the rear end are spaced apart from each other. During the process of changing the developing roller 15 and the photosensitive drum 14 from the state of being separated from each other to the state of approaching each other, 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.

[0240] In some embodiments, as shown in Figure 42 the vertical direction, the first surface 1311a has an upper end 1311d and a lower end 1311e spaced apart from each other, and in the longitudinal direction, the distance between the upper end 1311d and the first cartridge 111 is less than the distance between the lower end 1311e and the first cartridge 111, thereby further preventing the first surface 1311a from interfering with the force applying member 1 during the process of changing the developing roller 15 and the photosensitive drum 14 from the state of being separated from each other to the state of approaching each other.

[0241] As shown in Figure 43A when the developing roller 15 and the photosensitive drum 14 are in the state of approaching each other, the force applying member 1 / corner portion 1a is opposite to the first surface 1311a, and the corner portion 1a can be spaced apart from the first surface 1311a or in contact with the first surface 1311a; as shown in Figure 43B as the force applying member 1 gradually moves forward, the corner portion 1a is pressed against the first surface 1311a, the first cartridge 111 moves left in the longitudinal direction by the force applying member 1, the right pressing surface 1327R abuts against the first abutting portion 1211, the first cartridge 111 moves backward, and the developing roller 15 and the photosensitive drum 14 gradually separate from each other.

[0242] As described above, since the third surface 1311c is arranged in a non-planar shape, the force applying member 1 can smoothly pass through the third surface 1311c from the first surface 1311a, the developing roller 15 and the photosensitive drum 14 complete the separation from each other, finally, the end surface 1b of the force applying member is opposite to the second surface 1311b in the longitudinal direction, the first cartridge 111 is kept away from the photosensitive drum 14, and correspondingly, the developing roller 15 and the photosensitive drum 14 are kept in the state of being separated from each other.

[0243] In some embodiments, the second surface 1311b is arranged as a plane matching the end surface 1b of the force applying member, so that the developing roller 15 and the photosensitive drum 14 can be kept in a state of being separated from each other more stably, and at the same time, the force receiving portion 1311 can be prevented from being scratched, so that the developing roller 15 and the photosensitive drum 14 can be kept in an effective state of being separated from each other.

[0244] In some embodiments, the first surface 1311a can also be arranged as an inclined surface inclined with respect to the longitudinal direction, and preferably, the distance between the front end of the first surface 1311a and the first cartridge body 111 in the longitudinal direction is greater than the distance between the rear end of the first surface 1311a and the first cartridge body 111 in the longitudinal direction.

Claims

1. An image forming cartridge detachably mountable to a drum cartridge detachably installed to an electrophotographic image forming apparatus provided with a force applying member, the image forming cartridge comprising a first cartridge body and a developing roller rotatably provided in the first cartridge body, the drum cartridge comprising a second cartridge body and a photosensitive drum rotatably provided in the second cartridge body; the developing roller and the photosensitive drum being transitable between a mutual contact state in which the image forming cartridge performs image forming and a mutual separation state in which the image forming cartridge does not perform image forming; the image forming cartridge further comprising a separation member configured to force the developing roller and the photosensitive drum to transit from the mutual contact state to the mutual separation state by directly or indirectly receiving a force applied by the force applying member at one longitudinal end portion of the image forming cartridge and not directly receiving the force applied by the force applying member at the other longitudinal end portion of the image forming cartridge; the developing roller and the photosensitive drum being mutually separated at both longitudinal end portions of the image forming cartridge in a longitudinal direction of the image forming cartridge. The separation member, upon receiving the force applied by the force applying member, moves the first cartridge body in a direction away from the photosensitive drum by contacting a component in the drum cartridge or the image forming apparatus, and the developing roller and the photosensitive drum are mutually separated. characterized in that The separation member is provided on the first cartridge body, and the separation member comprises a force receiving member and a force applying portion. The force receiving member is provided at one longitudinal end portion of the image forming cartridge, configured to contact the force applying member and move relative to the photosensitive drum under the action of the force applying member. The force applying portion comprises a first force applying portion provided at the one longitudinal end portion and a second force applying portion provided at the other longitudinal end portion, and the first force applying portion and the second force applying portion move relative to the photosensitive drum in response to the movement of the force receiving member.

2. The process cartridge according to claim 1, wherein, The force applying member further comprises a connecting portion extending between the two longitudinal end portions of the image forming cartridge, and the first force applying portion and the second force applying portion are respectively provided at both ends of the connecting portion, and the first force applying portion transmits the force received by the force receiving member to the second force applying portion through the connecting portion.

3. The process cartridge of claim 2 wherein, The first force applying portion and the second force applying portion are both configured to mutually separate the developing roller and the photosensitive drum by abutting against the second cartridge body. The force receiving member and the connecting portion are integrally provided, the force receiving member comprises a force receiving portion, a driving portion and a guiding portion, and the connecting portion is provided with a driven portion. The force receiving portion is configured to abut against the force applying member to receive the force, the guiding portion is configured to guide the movement of the force receiving member, and the driving portion is configured to drive the driven portion.

4. The process cartridge of claim 3 wherein, The force receiving member and the connecting portion are integrally provided, the force receiving member has a force receiving portion for receiving the force applied by the force applying member, the first force applying portion and the force receiving portion are provided at the same end of the image forming cartridge, and an included angle is formed between the first force applying portion and the force receiving portion. The force receiving member and the connecting portion are integrally provided, and the force receiving member is configured to rotate about an axis parallel to the longitudinal direction of the image forming cartridge.

5. The process cartridge of claim 4 wherein, When the first force applying portion receives the force applied by the force applying member, the image forming cartridge as a whole moves in the longitudinal direction, the image forming cartridge moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are mutually separated. ​ 6. The process cartridge of claim 4 wherein, ​ 7. The process cartridge of claim 4 wherein, ​ 8. The process cartridge of claim 4 wherein, ​ 9. The process cartridge of claim 8 wherein, The drum cartridge further comprises a first support and a second support arranged on the second cartridge body, the photosensitive drum being supported by the first support and the second support; When the first force applying portion receives the force applied by the force applying member, the second force applying portion abuts against the first support.

10. The process cartridge of claim 4, wherein, The second force applying portion is provided with a pressing surface, the distance between the pressing surface and the rotation axis of the developing roller in a direction perpendicular to the rotation axis gradually decreases from the one longitudinal end to the other longitudinal end.

11. The process cartridge of claim 4, wherein, The image forming apparatus further comprises a guide rail for guiding the installation or removal of the developing cartridge, the second force applying portion abuts against the guide rail to move the developing cartridge relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

12. The process cartridge of claim 2, wherein, The separating member comprises a main body portion, a force receiving member and a force applying portion; The main body portion is fixedly arranged relative to the first cartridge body; The force receiving member is connected with the main body portion and is used for receiving the force applied by the force applying member; The force applying portion is connected with the main body portion, the force is applied to a force receiving portion outside the developing cartridge through the force applying portion, and the force receiving portion reacts on the force applying portion, so that the first cartridge body moves relative to the photosensitive drum, and the developing roller and the photosensitive drum are separated from each other.

13. The process cartridge of claim 1, wherein, The developing cartridge further comprises a range increasing member for abutting against an acting portion outside the developing cartridge, the range increasing member and the separating member are arranged on different sides of the developing cartridge in the longitudinal direction of the developing cartridge.

14. The process cartridge according to any one of claims 1-13 wherein, The drum cartridge is provided with a cartridge side force applying member arranged on the second cartridge body, the cartridge side force applying member has a first portion, a second portion and a third portion, wherein the first portion and the second portion are both connected with the third portion, the first portion is used for receiving the force applied by the force applying member, so that the cartridge side force applying member rotates around the third portion in the direction r2, and the second portion is used for transmitting the force to the separating member; The second portion is formed as a polygonal body, comprising a first side edge, a second side edge and a third side edge, wherein the two ends of the second side edge are respectively connected with the first side edge and the third side edge, the first side edge intersects with the second side edge at a first intersection point D1, the second side edge intersects with the third side edge at a second intersection point D2, and along the rotation direction r2, the first intersection point D1 is located downstream of the second intersection point D2; When the developing roller and the photosensitive drum are in the state of contacting each other, the part of the force receiving member for receiving the force is opposite to the first intersection point D1; When the developing roller and the photosensitive drum are in the state of being separated from each other, the part of the force receiving member for receiving the force is opposite to the second intersection point D2.

15. The process cartridge according to any one of claims 1-13, wherein, The drum cartridge is provided with a cartridge side force applying member arranged on the second cartridge body, the cartridge side force applying member has a first portion, a second portion and a third portion, wherein the first portion and the second portion are both connected with the third portion, the first portion is used for receiving the force applied by the force applying member, so that the cartridge side force applying member rotates around the third portion in the direction r2, and the second portion is used for transmitting the force to the separating member; The second portion is formed as a polygonal body, comprising a first side edge, a second side edge and a third side edge, wherein the two ends of the second side edge are respectively connected with the first side edge and the third side edge, the first side edge intersects with the second side edge at a first intersection point D1, the second side edge intersects with the third side edge at a second intersection point D2, and along the rotation direction r2, the first intersection point D1 is located downstream of the second intersection point D2; The portion of the force receiving member for receiving the force is opposite to two different positions of the second side edge respectively when the developing roller and the photosensitive drum are in the state of approaching each other and in the state of separating from each other, and the two different positions are between the first intersection D1 and the second intersection D2.

16. The process cartridge according to any one of claims 1-13, wherein, The separating member includes a first surface, a second surface, and a third surface, wherein the third surface is between the first surface and the second surface, and the second surface is farther away from the first surface than at least a portion of the first surface in the longitudinal direction of the developing cartridge; The force applying member is opposite to the first surface in the longitudinal direction of the developing cartridge when the developing roller and the photosensitive drum are in the state of contacting each other; The force applying member is opposite to the second surface in the longitudinal direction of the developing cartridge when the developing roller and the photosensitive drum are in the state of separating from each other, and the force applying member end face and the second surface abut each other.

Images